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WO2020184419A1 - Emitter and drip irrigation tube - Google Patents

Emitter and drip irrigation tube Download PDF

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Publication number
WO2020184419A1
WO2020184419A1 PCT/JP2020/009619 JP2020009619W WO2020184419A1 WO 2020184419 A1 WO2020184419 A1 WO 2020184419A1 JP 2020009619 W JP2020009619 W JP 2020009619W WO 2020184419 A1 WO2020184419 A1 WO 2020184419A1
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WO
WIPO (PCT)
Prior art keywords
emitter
pedestal
tube
irrigation liquid
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/009619
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French (fr)
Japanese (ja)
Inventor
好貴 小野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enplas Corp
Original Assignee
Enplas Corp
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Filing date
Publication date
Application filed by Enplas Corp filed Critical Enplas Corp
Publication of WO2020184419A1 publication Critical patent/WO2020184419A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion

Definitions

  • the present invention relates to an emitter and a drip irrigation tube having the emitter.
  • the drip irrigation method has been known as one of the plant cultivation methods.
  • the drip irrigation method is a method in which a drip irrigation tube is placed on the soil in which a plant is planted, and an irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil.
  • an irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil.
  • the drip irrigation method has attracted particular attention because it can minimize the consumption of irrigation liquid.
  • the drip irrigation tube is a tube in which a plurality of through holes for discharging the irrigation liquid are formed, and a plurality of emitters (“) for discharging the irrigation liquid from each through hole, which is joined to the inner wall surface of the tube. Also called “dripper").
  • Fluids such as air and water containing fine soil may flow back from the outside of the tube into the flow path of the emitter. This may cause clogging in the emitter.
  • the invention described in Patent Document 1 solves such a problem by providing a water-sealing accommodating portion in the emitter.
  • the emitter described in Patent Document 1 reduces the occurrence of clogging by preventing the backflow of fluid. However, once fine soil or the like gets into the emitter of the emitter described in Patent Document 1 for some reason, clogging may occur due to the fine soil or the like.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an emitter capable of suppressing the occurrence of clogging even if fine soil or the like gets into the emitter. It is also an object of the present invention to provide a drip irrigation tube using the above emitter.
  • the emitter according to the present invention is joined to a position on the inner wall surface of a tube through which an irrigation liquid flows, corresponding to a discharge port communicating with the inside and outside of the tube, and the irrigation liquid in the tube is quantified from the discharge port.
  • It is an emitter for discharging to the outside of the tube, and has an emitter main body, a pedestal portion accommodated in the emitter main body, and a rotary blade, and the emitter main body takes in the irrigation liquid.
  • the pedestal portion is accommodated by communicating with the water intake part of the above, a decompression flow path groove for forming a decompression flow path for flowing the irrigation liquid while depressurizing the irrigation liquid, and the decompression flow path groove.
  • a diaphragm portion that is flexible and deforms toward the pedestal portion when the pedestal portion is accommodated in the accommodating portion and is subjected to the pressure of the irrigation liquid in the tube.
  • the pedestal portion has a pedestal in which the diaphragm portion under the pressure of the irrigation liquid in the tube comes into contact with the pedestal portion, and one opening of the pedestal portion opens into the pedestal, and the decompression flow path groove is used. It has a communication hole for discharging the irrigation liquid that has flowed into the accommodating portion toward the discharge port, and the rotary blade is arranged between the diaphragm portion and the pedestal portion and around the pedestal. Is configured to rotate.
  • the drip irrigation tube according to the present invention includes a tube having a discharge port for discharging an irrigation liquid, and an emitter according to the present invention joined at a position corresponding to the discharge port on the inner wall surface of the tube. Has.
  • an emitter capable of suppressing the occurrence of clogging even if fine soil or the like gets into the emitter, and a drip irrigation tube using the emitter.
  • FIG. 1 is a diagram showing a drip irrigation tube according to an embodiment of the present invention.
  • 2A to 2D are views showing the configuration of the emitter according to the embodiment of the present invention after the pedestal portion is accommodated in the accommodating portion.
  • FIG. 3A is a bottom view showing the configuration of an emitter (emitter body) according to the embodiment of the present invention before accommodating the pedestal portion in the accommodating portion, and
  • FIGS. 3B to 3E show the pedestal portion after accommodating the rotor blades. It is a figure which shows.
  • 4A to 4E are views showing rotary blades.
  • FIG. 1 is a diagram of a drip irrigation tube 100 according to an embodiment of the present invention. Note that FIG. 1 shows a state in which only the tube 110 is cut and the emitter 120 is not cut.
  • the drip irrigation tube 100 has a tube 110 and an emitter 120.
  • the tube 110 is a pipe for flowing an irrigation liquid.
  • irrigation liquids include water, liquid fertilizers, pesticides and mixtures thereof.
  • the direction in which the irrigation liquid flows in the tube 110 is not particularly limited.
  • the material of the tube 110 is not particularly limited. In this embodiment, the material of the tube 110 is polyethylene.
  • a plurality of discharge ports 111 for discharging the irrigation liquid at predetermined intervals (for example, 200 mm or more and 500 mm or less) in the axial direction of the tube 110 are formed on the tube wall of the tube 110.
  • the diameter of the opening of the discharge port 111 is not particularly limited as long as the irrigation liquid can be discharged. In the present embodiment, the diameter of the opening of the discharge port 111 is 1.5 mm.
  • Emitters 120 are joined to positions of the inner wall surface 112 corresponding to the discharge port 111.
  • the cross-sectional shape and cross-sectional area perpendicular to the axial direction of the tube 110 are not particularly limited as long as the emitter 120 can be arranged inside the tube 110 without leakage.
  • the drip irrigation tube 100 is manufactured by joining the back surface 125 (see FIGS. 2B to D) of the emitter 120 to the inner wall surface 112.
  • the method of joining the tube 110 and the emitter 120 is not particularly limited. Examples of the method of joining the tube 110 and the emitter 120 include welding of the resin material constituting the tube 110 or the emitter 120, and bonding with an adhesive.
  • the discharge port 111 may be formed after joining the tube 110 and the emitter 120, or may be formed before joining.
  • FIG. 2A and 2B are diagrams showing the configuration of the emitter according to the embodiment after accommodating the pedestal portion 122 in the accommodating portion 135.
  • 2A is a plan view of the emitter 120
  • FIG. 2B is a bottom view
  • FIG. 2C is a left side view
  • FIG. 2D is a right side view.
  • FIG. 3A is a bottom view showing the configuration of the emitter 120 (emitter body 121) according to the embodiment before accommodating the pedestal portion 122 in the accommodating portion 135.
  • 3B to 3E are views showing the pedestal portion 122 after accommodating the rotary blade 180.
  • 3B is a plan view of the pedestal portion 122
  • FIG. 3C is a bottom view
  • FIG. 3D is a left side view
  • FIG. 3E is a right side view.
  • the emitter 120 is joined to the inner wall surface of the tube so as to cover the discharge port of the tube.
  • the shape of the emitter 120 is not particularly limited as long as it can be brought into close contact with the inner wall surface of the tube and cover the discharge port.
  • the shape of the back surface 125 joined to the inner wall surface in the cross section of the emitter 120 perpendicular to the axial direction of the tube is a substantially arc shape that is convex toward the inner wall surface along the inner wall surface.
  • the size of the emitter 120 is not particularly limited and may be appropriately determined based on a desired amount of irrigation liquid discharged from the discharge port.
  • the length of the emitter 120 in the long side direction is 19 mm
  • the length in the short side direction is 8 mm
  • the height is 2.7 mm.
  • the emitter 120 is formed of an elastic material.
  • materials for the emitter 120 include resins, elastomers and rubbers.
  • resins include polyethylene and silicone.
  • the flexibility of the emitter 120 can be adjusted by using an elastic material. Examples of methods for adjusting the flexibility of the emitter 120 include selecting an elastic resin and adjusting the mixing ratio of the elastic resin to a hard resin material.
  • the index indicating the hardness of the material of the emitter 120 includes the durometer hardness specified in JIS K6253-3 (2012).
  • the hardness of the material of the emitter 120 is about D60 in terms of durometer hardness.
  • the durometer hardness includes type A, type D, type E, and the like, depending on the type of durometer used for measurement.
  • the durometer hardness D60 is obtained.
  • the durometer hardness is the hardest in type D, and becomes softer in the order of type A and type E.
  • the effect of suppressing the deformation of the pedestal 122 is more exhibited in the material having the durometer hardness of D60 or less.
  • the emitter 120 has an emitter main body 121, a pedestal portion 122 housed in the emitter main body 121, and a rotor blade 180.
  • the rotor 180 is placed in the pedestal 122, which is housed in the accommodating portion 135 of the emitter body 121.
  • the rotor 180 is arranged between the diaphragm portion 153 and the pedestal portion 122.
  • the emitter body 121 and the pedestal portion 122 are molded as one or as separate bodies.
  • the rotary blade 180 is preferably formed as a separate body.
  • the method of integrally molding the emitter body 121 and the pedestal portion 122 is not particularly limited.
  • the emitter body 121 and the pedestal portion 122 are integrally molded, for example, the emitter body 121, the pedestal portion 121, and the hinge portion 123 are integrally molded by injection molding. In the present embodiment, the emitter body 121 and the pedestal portion 122 are molded as separate bodies.
  • the emitter 120 has a water intake portion 131, a first connection groove 132 as a first connection flow path 142, a pressure reduction groove 133 as a decompression flow path 143, and a second connection groove 134 as a second connection flow path 144. ..
  • the rotary blade 180 is arranged between the diaphragm portion 153 and the pedestal portion 122 of the emitter main body 121, and the pedestal portion 122 is accommodated in the accommodating portion 135 of the emitter main body 121, whereby the flow rate adjusting portion 136 and the flow path An opening / closing portion 138 and a discharge portion 137 are formed.
  • a water intake portion 131 is open on the surface 124 of the emitter body 121 (emitter 120).
  • the back surface 125 of the emitter body 121 (emitter 120) has a first connection groove 132, a pressure reducing groove 133, and a second connection groove 134.
  • a discharge groove 172 is opened on the back surface 125 of the pedestal portion 122.
  • the first connection groove 132, the decompression groove 133, and the second connection groove 134 become the first connection flow path 142, the decompression flow path 143, and the second connection flow path 144, respectively.
  • it is composed of a water intake section 131, a first connection flow path 142, a decompression flow path 143, a second connection flow path 144, a flow rate adjustment section 136, and a discharge section 137, and a flow path connecting the water intake section 131 and the discharge section 137. Is formed.
  • the flow path allows the irrigation liquid to flow from the intake section 131 to the discharge section 137.
  • the water intake unit 131 is arranged in a half region of the surface 124 of the emitter body 121.
  • the number of water intake units 131 is not particularly limited. In this embodiment, one water intake unit 131 is arranged on one half surface of the emitter 120 in the long axis direction (FIG. 2A).
  • the flow rate adjusting unit 136 and the flow path opening / closing unit 138 are arranged in the region of the surface 124 where the water intake unit 131 is not arranged (FIG. 2A).
  • the water intake unit 131 has a water intake side screen unit 171 and a water intake through hole 147.
  • the water intake side screen portion 171 prevents suspended matter in the irrigation liquid taken into the emitter 120 from entering the water intake through hole 147.
  • the water intake side screen portion 171 is open in the tube and has a water intake recess 173 and a ridge 174.
  • the water intake recess 173 is a recess formed on the surface 124 of the emitter 120 in almost the entire region of one half surface on which the diaphragm portion 153 is not arranged.
  • the depth of the water intake recess 173 is not particularly limited, and is appropriately set depending on the size of the emitter 120.
  • a ridge 174 is formed on the bottom surface of the water intake recess 173. Further, a water intake through hole 147 is formed on the bottom surface of the water intake recess 173.
  • the ridge 174 is arranged on the bottom surface of the water intake recess 173.
  • the arrangement and number of the ridges 174 are not particularly limited as long as the irrigation liquid can be taken in from the opening side of the water intake recess 173 and the intrusion of suspended matter in the irrigation liquid can be prevented.
  • a plurality of ridges 174 are arranged in the major axis direction of the water intake recess 173.
  • a water intake through hole 147 is formed on the bottom surface of the water intake recess 173.
  • the ridge 174 may be formed so that the width decreases from the surface 124 of the emitter 120 toward the bottom surface of the water intake recess 173, or the same from the surface 124 of the emitter 120 to the bottom surface of the water intake recess 173. It may be formed in a width.
  • the water intake through hole 147 is formed on the bottom surface of the water intake recess 173.
  • the shape and number of the water intake through holes 147 are not particularly limited as long as the irrigation liquid taken into the water intake recess 173 can be taken into the emitter body 121.
  • the water intake through hole 147 is two elongated holes formed along the long axis direction of the bottom surface of the water intake recess 173. Since the elongated hole is covered with a plurality of protrusions 174, when viewed from the front side, the two water intake through holes 147 appear to be divided into a large number of through holes.
  • the irrigation liquid that has flowed through the tube is taken into the emitter 120 while the water intake side screen portion 171 prevents suspended matter from entering the water intake through hole 147.
  • the first connection groove 132 (first connection flow path 142) connects the water intake through hole 147 (water intake portion 131) and the decompression groove 133 (decompression flow path 143).
  • the first connection groove 132 is formed along the outer edge of the back surface 125 of the emitter 120.
  • a pressure reducing groove 133 is connected to one end of the first connecting groove 132.
  • the decompression groove 133 (decompression flow path 143) connects the first connection groove 132 (first connection flow path 142) and the second connection groove 134 (second connection flow path 144).
  • the decompression groove 133 (decompression flow path 143) reduces the pressure of the irrigation liquid taken in from the water intake unit 131, and guides the irrigation liquid toward the flow rate adjusting unit 136.
  • the pressure reducing groove 133 is arranged along the major axis direction at one end of the back surface 125 in the minor axis direction. The upstream end of the pressure reducing groove 133 is connected to the first connecting groove 132, and the second connecting groove 134 communicating with the flow rate adjusting unit 136 is connected to the downstream end.
  • the shape of the pressure reducing groove 133 is not particularly limited as long as it can exhibit the above-mentioned functions.
  • the plan view shape of the pressure reducing groove 133 is a zigzag shape.
  • substantially triangular prism-shaped convex portions 175 protruding from the inner side surface are alternately arranged along the direction in which the irrigation liquid flows.
  • the convex portion 175 is arranged so that the tip thereof does not exceed the central axis of the pressure reducing groove 133 when viewed in a plan view.
  • the second connection groove 134 (second connection flow path 144) connects the pressure reducing groove 133 (pressure reduction flow path 143) and the notch groove 150.
  • the second connection groove 134 is a groove formed linearly along the long axis direction of the emitter 120 on the back surface 125 side of the emitter 120.
  • the upstream end of the second connection groove 134 is connected to the pressure reducing groove 133, and the downstream end of the second connection groove 134 is connected to the flow rate adjusting unit 136.
  • the second connection flow path 144 is formed by the second connection groove 134 and the inner wall surface of the tube.
  • the irrigation liquid decompressed by the decompression flow path 133 is guided to the flow rate adjusting unit 136 through the second connection flow path 144.
  • the flow rate adjusting unit 136 adjusts the flow rate of the flowing irrigation liquid.
  • the flow rate adjusting unit 136 is arranged in a region where the water intake unit 131 of the emitter 120 is not arranged.
  • the flow rate adjusting unit 136 includes an accommodating unit 135, a pedestal 161, a communication hole 151, a diaphragm portion 153, and a rotary blade 180.
  • the pedestal portion 122 has a pedestal 161 and a communication hole 151, and a connecting groove 162.
  • the pedestal portion 122 has a deformation suppressing portion 152.
  • the rotor 180 is arranged in the accommodating portion 135 so as to be located between the pedestal portion 122 and the diaphragm portion 153. The rotor 180 is arranged so that it can rotate around the pedestal 161.
  • the accommodating portion 135 accommodates a pedestal portion 122 having a pedestal 161 for adjusting the amount of the irrigation liquid flowing from the second connecting flow path 143 discharged from the discharge port of the tube.
  • the rotor 180 is also accommodated in the accommodating portion 135. After the pedestal portion 122 and the rotor blade 180 are accommodated in the accommodating portion 135, the emitter 120 is joined to the inner wall surface of the tube.
  • the pedestal 161 is a region where the diaphragm portion 153 deformed by the pressure of the irrigation liquid comes into contact.
  • the shape of the pedestal 161 is not particularly limited.
  • the shape of the pedestal 161 may be a curved surface or a flat surface. In the present embodiment, the shape of the pedestal 161 is a flat surface.
  • the communication hole 151 is used to discharge the irrigation liquid that has flowed into the accommodating portion 135 toward the discharge port 137.
  • the communication hole 151 is opened in the central portion of the pedestal 161.
  • the size of the opening of the communication hole 151 is not particularly limited and can be set as appropriate.
  • the connecting groove 162 is a groove for guiding the irrigation liquid to the communication hole 151 even when the diaphragm portion 153 is in contact with the pedestal 161.
  • One end of the connecting groove 162 communicates with the communication hole 151.
  • the other end of the connecting groove 162 is arranged outside the outer edge of the contact area of the pedestal 161 in a state where the diaphragm portion 153 is in contact with the pedestal 161.
  • the deformation suppressing portion 152 contacts the tube when the diaphragm portion 153 is in contact with the pedestal 161 under the pressure of the irrigation liquid to suppress the deformation of the pedestal 161.
  • the deformation suppressing portion 152 is arranged so as to project from a surface opposite to the surface of the pedestal 161 to which the diaphragm portion 153 deformed under the pressure of the irrigation liquid comes into contact.
  • the deformation suppressing portion 152 is arranged around the opening of the communication hole 151 on the discharge port 137 side.
  • the shape of the deformation suppressing portion 152 is not limited as long as the deformation of the pedestal 161 can be suppressed.
  • the height of the deformation suppressing portion 152 may be a height that contacts the inner wall surface of the tube when placed on the tube, or may be a height that does not contact the inner wall surface of the tube.
  • the pedestal portion 122 arranged in the accommodating portion 135 and the diaphragm portion 153 facing the pedestal 161 make the emitter 120 depending on the pressure of the irrigation liquid in the tube.
  • a flow rate adjusting unit 136 for adjusting the flow rate of the irrigation liquid discharged from the communication hole 151 of the (pedestal 161) is configured.
  • the diaphragm portion 153 has a circular shape in a plan view.
  • the diaphragm portion 153 is integrally formed with another configuration of the emitter body 121.
  • the diaphragm portion 153 is flexible because it is integrally molded with the other configuration of the emitter body 121.
  • the diaphragm portion 153 is deformed toward the pedestal 161 by the pressure of the irrigation liquid in the tube in a state where the emitter 120 is joined to the inner wall surface of the tube.
  • the emitter body 121 and the pedestal portion 122 may be manufactured in a state of being connected via the hinge portion 123.
  • the hinge portion 123 connects the emitter body 121 and the pedestal portion 122 at the time of manufacturing the emitter 120.
  • the shape and size of the hinge portion 123 can be appropriately set within a range in which the above-mentioned functions can be exhibited.
  • the hinge portion 123 may be connected to the side surface 126 continuous with the back surface 125, may be arranged on the side surface located at both ends in the long axis direction (in the direction in which the irrigation liquid flows) of the emitter body 121, or may be arranged on the side surface of the emitter.
  • the hinge portion 123 is preferably connected to the side surface 126 on the upstream side or the downstream side in the direction in which the irrigation liquid flows.
  • the hinge portion 123 may be bent or may be separated from the emitter main body 121 and the pedestal portion 122 when the pedestal portion 122 is accommodated in the accommodating portion 135.
  • the hinge portion 123 is housed in a groove 164 formed in the back surface 125 of the emitter body 121.
  • the back surface 125 of the emitter 120 is appropriately joined to the inner wall surface of the tube in a state where the hinge portion 123 is housed in the groove 164 formed in the back surface 125 of the emitter body 121.
  • the groove 164 accommodates the hinge portion 123 that has been cut when the pedestal portion 122 is accommodated in the accommodating portion 135.
  • the shape of the groove 164 is not particularly limited as long as the hinge portion 123 can be accommodated and the irrigation liquid does not leak out.
  • the groove 164 is formed to be slightly smaller than the hinge portion 123.
  • the rotor blade 180 is arranged between the pedestal portion 122 and the diaphragm portion 153, and is configured to rotate around the pedestal portion 161.
  • the irrigation liquid that has flowed through the second connecting flow path 144 flows between the diaphragm portion 153 and the pedestal portion 122 through the notch groove 150.
  • the rotor 180 is rotated by the irrigation liquid that has flowed in, and winds up, for example, soil on the pedestal portion 122.
  • the rotary blade 180 suppresses the accumulation of soil and the like in the accommodating portion 135, and suppresses the occurrence of clogging in the emitter.
  • FIGS. 4A to 4E are diagrams showing the configuration of the rotary blade 180.
  • 4A is a plan view of the rotor 180 shown in FIG. 3B
  • FIG. 4B is a front view of the rotor 180 shown in FIG. 3B
  • 4C is a plan view of another rotor 180
  • FIG. 4D is a plan view of yet another rotor 180
  • FIG. 4E is a plan view of yet another rotor 180.
  • the rotary blade 180 has a plurality of blades 181 and a support portion 182 for supporting the plurality of blades 181.
  • the thickness of the support portion 182 is larger than the thickness of the blade 181 in the direction along the central axis (rotation axis) of the rotary blade 180.
  • the support portion 182 comes into contact with the pedestal portion 122, while the blades 181 do not come into contact with the pedestal portion 122.
  • the rotor 180 is easily rotated by the irrigation liquid that has flowed in.
  • the number of support portions 182 is not particularly limited, and may be one or a plurality.
  • the rotor 180 has one support 182.
  • the rotor 180 has two supports 182.
  • the position of the support portion 182 is not limited.
  • the support portion 182 is arranged on the central axis (rotation axis) side of the rotary blade 180.
  • the support portion 182 is arranged on the outer peripheral side of the rotary blade 180.
  • the support portion 182 is arranged at an intermediate point between the central portion and the outer peripheral portion of the rotary blade 180.
  • the discharge unit 137 temporarily stores the irrigation liquid from the communication hole 151.
  • the irrigation liquid that has reached the discharge unit 137 is discharged to the outside from the discharge unit 137.
  • the diaphragm portion 153 was not deformed because the pressure of the irrigation liquid was not applied to the diaphragm portion 153.
  • the diaphragm portion 153 of the flow rate adjusting portion 136 starts to be deformed toward the pedestal 161. In this state, since the diaphragm portion 153 is separated from the pedestal 161, the irrigation liquid taken in from the water intake portion 131 is discharged from the discharge port 111 of the tube 110 to the outside with almost no adjustment of the flow rate by the flow rate adjusting portion 136. It is discharged.
  • the rotor blade 180 arranged between the pedestal portion 122 and the diaphragm portion 153 starts to rotate due to the flowing irrigation liquid, and winds up the soil and the like accumulated on the pedestal portion 122.
  • the rolled up soil is discharged to the outside together with the irrigation liquid.
  • the diaphragm portion 153 When the pressure of the irrigation liquid in the tube increases, the diaphragm portion 153 further deforms toward the pedestal 161 and begins to approach the connecting hole 151. As described above, when the pressure of the irrigation liquid in the tube becomes high enough to deform the diaphragm portion 153 to some extent, the diaphragm portion 153 approaches the pedestal 161 and the amount of the irrigation liquid flowing between the diaphragm portion 153 and the pedestal 161. Is reduced. That is, the irrigation liquid taken in from the water intake unit 131 is discharged to the outside from the discharge port 111 of the tube 110 after the flow rate is adjusted by the flow rate adjusting unit 136.
  • the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.
  • the diaphragm portion 153 When the pressure of the irrigation liquid in the tube becomes higher, the diaphragm portion 153 further deforms toward the pedestal 161 and comes into contact with the pedestal 161 to close the connecting hole 151. However, since the connecting groove 162 is not blocked, the irrigation liquid flows through the connecting groove 162 and reaches the discharging portion 137 from the connecting hole 151, and a certain amount is discharged. That is, the irrigation liquid taken in from the water intake unit 131 is discharged to the outside from the discharge port 111 of the tube 110 after the flow rate is largely adjusted by the flow rate adjusting unit 136.
  • the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.
  • the pressure of the irrigation liquid exceeds the set value, the amount of deformation of the diaphragm portion 153 further increases, and the diaphragm portion 153 comes into close contact with the pedestal 161. Even in such a case, the deformation of the pedestal is suppressed by the deformation suppressing portion. Specifically, the reaction force generated when the bottom surface of the deformation suppressing portion 152 comes into contact with the inner wall surface of the tube cancels the pressure on the pedestal 161 by the diaphragm portion 153.
  • the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.
  • the rotor blade 180 may rotate only when the flow of the irrigation liquid is strong, and may wind up the accumulated soil or the like. The soil that has been rolled up is discharged to the outside of the emitter by the flow of irrigation liquid.
  • the emitter 120 since the rotor 180 rotates in the flow rate adjusting unit 136, even if dirt or the like gets into the emitter 120 (particularly in the flow rate adjusting unit 136), the emitter Accumulation of soil or the like in 120 (particularly in the flow rate adjusting unit 136) is suppressed.
  • the pedestal portion 122 is housed in the emitter main body 121, and the rotary blade 180 is arranged between the diaphragm portion 153 and the pedestal portion 122 of the emitter main body 121.
  • the emitter body and the pedestal may be integrally molded, and the diaphragm portion may be a separate body (for example, an elastic film), and the emitter may be formed by joining these. That is, the emitter may have a configuration including an emitter body, a diaphragm portion, and a rotor blade.
  • the emitter body includes a water intake, a decompression flow path groove, a pedestal, a recess that opens on the surface side of the emitter body where the pedestal is arranged, and a communication hole that discharges irrigation liquid toward the discharge port.
  • the diaphragm portion is formed by joining a film or the like having elasticity on the surface of the emitter body so as to close the concave portion that opens on the surface side.
  • the rotors are arranged to rotate around the pedestal.
  • the present invention it is possible to provide an emitter capable of suppressing clogging and a drip irrigation tube using the emitter. Therefore, it is expected that the emitter and the drip irrigation tube using the emitter will be further spread.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Nozzles (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Abstract

The present invention relates to the provision of an emitter in which clogging can be suppressed even when fine soil or the like enters the emitter. The emitter has an emitter body, a base part accommodated in the emitter body, and a rotary blade. The emitter body comprises a water intake part, a reduced-pressure flow path groove, an accommodating unit, and a diaphragm part. The base part has a base and a communication hole. The rotary blade is disposed between the diaphragm part and the base part and configured to rotate around the base.

Description

エミッタおよび点滴灌漑用チューブEmitter and drip irrigation tube

　本発明は、エミッタおよび当該エミッタを有する点滴灌漑用チューブに関する。 The present invention relates to an emitter and a drip irrigation tube having the emitter.

　以前から、植物の栽培方法の一つとして点滴灌漑法が知られている。点滴灌漑法とは、植物が植えられている土壌に点滴灌漑用チューブを配置し、点滴灌漑用チューブから土壌へ、水や液体肥料等の灌漑用液体を滴下する方法である。近年、点滴灌漑法は、灌漑用液体の消費量を最小限にすることが可能であるため、特に注目されている。 For some time, the drip irrigation method has been known as one of the plant cultivation methods. The drip irrigation method is a method in which a drip irrigation tube is placed on the soil in which a plant is planted, and an irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil. In recent years, the drip irrigation method has attracted particular attention because it can minimize the consumption of irrigation liquid.

　点滴灌漑用チューブは、灌漑用液体が吐出される複数の貫通孔が形成されたチューブと、当該チューブの内壁面に接合され、各貫通孔から灌漑用液体を吐出するための複数のエミッタ（「ドリッパ」ともいう）とを有する。 The drip irrigation tube is a tube in which a plurality of through holes for discharging the irrigation liquid are formed, and a plurality of emitters (“) for discharging the irrigation liquid from each through hole, which is joined to the inner wall surface of the tube. Also called "dripper").

　エミッタの流路には、チューブ外から細かい土を含んだ空気や水などの流体が逆流することがある。これにより、エミッタ内で、目詰まりが生じたりすることがある。例えば、特許文献１に記載の発明は、このような問題を、エミッタに封水収容部を設けることで解決している。 Fluids such as air and water containing fine soil may flow back from the outside of the tube into the flow path of the emitter. This may cause clogging in the emitter. For example, the invention described in Patent Document 1 solves such a problem by providing a water-sealing accommodating portion in the emitter.

特開２０１８－１７４７８８号公報Japanese Unexamined Patent Publication No. 2018-174788

　特許文献１に記載のエミッタは、流体の逆流を防ぐことで目詰まりの発生を低減させている。しかしながら、特許文献１に記載のエミッタには、何らかの理由でエミッタ内に細かい土などが一旦入り込んでしまうと、その細かい土などに起因して目詰まりが発生してしまうおそれがある。 The emitter described in Patent Document 1 reduces the occurrence of clogging by preventing the backflow of fluid. However, once fine soil or the like gets into the emitter of the emitter described in Patent Document 1 for some reason, clogging may occur due to the fine soil or the like.

　本発明は、上記事情に鑑みてなされたものであり、エミッタ内に細かい土などが入り込んでしまっても目詰まりの発生を抑制することができるエミッタを提供することを目的とする。また、本発明は、上記エミッタを用いる点滴灌漑用チューブを提供することも目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an emitter capable of suppressing the occurrence of clogging even if fine soil or the like gets into the emitter. It is also an object of the present invention to provide a drip irrigation tube using the above emitter.

　本発明に係るエミッタは、灌漑用液体を流通させるチューブの内壁面における、前記チューブの内外を連通する吐出口に対応する位置に接合されて前記チューブ内の前記灌漑用液体を前記吐出口から定量的に前記チューブ外に吐出するためのエミッタであって、エミッタ本体と、前記エミッタ本体に収容される台座部と、回転翼と、を有し、前記エミッタ本体は、前記灌漑用液体を取り入れるための取水部と、前記取水部に連通し、前記灌漑用液体を減圧させながら流す減圧流路を形成するための減圧流路溝と、前記減圧流路溝に連通し、前記台座部を収容するための収容部と、可撓性を有し、前記台座部を前記収容部に収容した状態で、前記チューブ内の灌漑用液体の圧力を受けたときに前記台座部に向かって変形するダイヤフラム部と、を有し、前記台座部は、前記チューブ内の灌漑用液体の圧力を受けた前記ダイヤフラム部が接触する台座と、一方の開口部が前記台座に開口し、前記減圧流路溝から前記収容部内に流入した灌漑用液体を前記吐出口に向けて排出するための連通孔と、を有し、前記回転翼は、前記ダイヤフラム部と前記台座部との間に配置され、前記台座の周りを回転するように構成されている。 The emitter according to the present invention is joined to a position on the inner wall surface of a tube through which an irrigation liquid flows, corresponding to a discharge port communicating with the inside and outside of the tube, and the irrigation liquid in the tube is quantified from the discharge port. It is an emitter for discharging to the outside of the tube, and has an emitter main body, a pedestal portion accommodated in the emitter main body, and a rotary blade, and the emitter main body takes in the irrigation liquid. The pedestal portion is accommodated by communicating with the water intake part of the above, a decompression flow path groove for forming a decompression flow path for flowing the irrigation liquid while depressurizing the irrigation liquid, and the decompression flow path groove. A diaphragm portion that is flexible and deforms toward the pedestal portion when the pedestal portion is accommodated in the accommodating portion and is subjected to the pressure of the irrigation liquid in the tube. The pedestal portion has a pedestal in which the diaphragm portion under the pressure of the irrigation liquid in the tube comes into contact with the pedestal portion, and one opening of the pedestal portion opens into the pedestal, and the decompression flow path groove is used. It has a communication hole for discharging the irrigation liquid that has flowed into the accommodating portion toward the discharge port, and the rotary blade is arranged between the diaphragm portion and the pedestal portion and around the pedestal. Is configured to rotate.

　本発明に係る点滴灌漑用チューブは、灌漑用液体を吐出するための吐出口を有するチューブと、前記チューブの内壁面の前記吐出口に対応する位置に接合された、本発明に係るエミッタと、を有する。 The drip irrigation tube according to the present invention includes a tube having a discharge port for discharging an irrigation liquid, and an emitter according to the present invention joined at a position corresponding to the discharge port on the inner wall surface of the tube. Has.

　本発明によれば、エミッタ内に細かい土などが入り込んでしまっても目詰まりの発生を抑制することができるエミッタ、および当該エミッタを用いる点滴灌漑用チューブを提供できる。 According to the present invention, it is possible to provide an emitter capable of suppressing the occurrence of clogging even if fine soil or the like gets into the emitter, and a drip irrigation tube using the emitter.

図１は、本発明の実施の形態に係る点滴灌漑用チューブを示す図である。FIG. 1 is a diagram showing a drip irrigation tube according to an embodiment of the present invention. 図２Ａ～Ｄは、台座部を収容部に収容した後の本発明の実施の形態に係るエミッタの構成を示す図である。2A to 2D are views showing the configuration of the emitter according to the embodiment of the present invention after the pedestal portion is accommodated in the accommodating portion. 図３Ａは台座部を収容部に収容する前の本発明の実施の形態に係るエミッタ（エミッタ本体）の構成を示す底面図であり、図３Ｂ～Ｅは回転翼を収容した後の台座部を示す図である。FIG. 3A is a bottom view showing the configuration of an emitter (emitter body) according to the embodiment of the present invention before accommodating the pedestal portion in the accommodating portion, and FIGS. 3B to 3E show the pedestal portion after accommodating the rotor blades. It is a figure which shows. 図４Ａ～Ｅは回転翼を示す図である。4A to 4E are views showing rotary blades.

　以下、本発明の実施の形態について、図面を参照して詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

　（点滴灌漑用チューブおよびエミッタの構成）
　図１は、本発明の実施の形態に係る点滴灌漑用チューブ１００の図である。なお、図１では、チューブ１１０のみを切断し、エミッタ１２０は切断していない状態を示している。 (Composition of drip irrigation tube and emitter)
FIG. 1 is a diagram of a drip irrigation tube 100 according to an embodiment of the present invention. Note that FIG. 1 shows a state in which only the tube 110 is cut and the emitter 120 is not cut.

　図１に示されるように、点滴灌漑用チューブ１００は、チューブ１１０およびエミッタ１２０を有する。 As shown in FIG. 1, the drip irrigation tube 100 has a tube 110 and an emitter 120.

　チューブ１１０は、灌漑用液体を流すための管である。灌漑用液体の例には、水、液体肥料、農薬およびこれらの混合液が含まれる。チューブ１１０において、灌漑用液体を流す方向については、特に限定されない。また、チューブ１１０の材料は、特に限定されない。本実施の形態では、チューブ１１０の材料は、ポリエチレンである。 The tube 110 is a pipe for flowing an irrigation liquid. Examples of irrigation liquids include water, liquid fertilizers, pesticides and mixtures thereof. The direction in which the irrigation liquid flows in the tube 110 is not particularly limited. The material of the tube 110 is not particularly limited. In this embodiment, the material of the tube 110 is polyethylene.

　チューブ１１０の管壁には、チューブ１１０の軸方向において所定の間隔（例えば、２００ｍｍ以上５００ｍｍ以下）で灌漑用液体を吐出するための複数の吐出口１１１が形成されている。吐出口１１１の開口部の直径は、灌漑用液体を吐出できれば特に限定されない。本実施の形態では、吐出口１１１の開口部の直径は、１．５ｍｍである。内壁面１１２の吐出口１１１に対応する位置には、エミッタ１２０がそれぞれ接合される。チューブ１１０の軸方向に垂直な断面形状および断面積は、チューブ１１０の内部にエミッタ１２０を液漏れなく配置できれば特に限定されない。 A plurality of discharge ports 111 for discharging the irrigation liquid at predetermined intervals (for example, 200 mm or more and 500 mm or less) in the axial direction of the tube 110 are formed on the tube wall of the tube 110. The diameter of the opening of the discharge port 111 is not particularly limited as long as the irrigation liquid can be discharged. In the present embodiment, the diameter of the opening of the discharge port 111 is 1.5 mm. Emitters 120 are joined to positions of the inner wall surface 112 corresponding to the discharge port 111. The cross-sectional shape and cross-sectional area perpendicular to the axial direction of the tube 110 are not particularly limited as long as the emitter 120 can be arranged inside the tube 110 without leakage.

　点滴灌漑用チューブ１００は、エミッタ１２０の裏面１２５（図２Ｂ～Ｄ参照）を内壁面１１２に接合することによって作製される。チューブ１１０とエミッタ１２０との接合方法は、特に限定されない。チューブ１１０とエミッタ１２０との接合方法の例には、チューブ１１０またはエミッタ１２０を構成する樹脂材料の溶着、接着剤による接着が含まれる。吐出口１１１は、チューブ１１０とエミッタ１２０とを接合した後に形成されてもよいし、接合前に形成されてもよい。 The drip irrigation tube 100 is manufactured by joining the back surface 125 (see FIGS. 2B to D) of the emitter 120 to the inner wall surface 112. The method of joining the tube 110 and the emitter 120 is not particularly limited. Examples of the method of joining the tube 110 and the emitter 120 include welding of the resin material constituting the tube 110 or the emitter 120, and bonding with an adhesive. The discharge port 111 may be formed after joining the tube 110 and the emitter 120, or may be formed before joining.

　（エミッタの構成）
　図２Ａ、Ｂは、台座部１２２を収容部１３５に収容した後の実施の形態に係るエミッタの構成を示す図である。図２Ａはエミッタ１２０の平面図であり、図２Ｂは底面図であり、図２Ｃは左側面図であり、図２Ｄは右側面図である。図３Ａは、台座部１２２を収容部１３５に収容する前の実施の形態に係るエミッタ１２０（エミッタ本体１２１）の構成を示す底面図である。図３Ｂ～Ｅは、回転翼１８０を収容した後の台座部１２２を示す図である。図３Ｂは台座部１２２の平面図であり、図３Ｃは底面図であり、図３Ｄは左側面図であり、図３Ｅは右側面図である。 (Emitter configuration)
2A and 2B are diagrams showing the configuration of the emitter according to the embodiment after accommodating the pedestal portion 122 in the accommodating portion 135. 2A is a plan view of the emitter 120, FIG. 2B is a bottom view, FIG. 2C is a left side view, and FIG. 2D is a right side view. FIG. 3A is a bottom view showing the configuration of the emitter 120 (emitter body 121) according to the embodiment before accommodating the pedestal portion 122 in the accommodating portion 135. 3B to 3E are views showing the pedestal portion 122 after accommodating the rotary blade 180. 3B is a plan view of the pedestal portion 122, FIG. 3C is a bottom view, FIG. 3D is a left side view, and FIG. 3E is a right side view.

　エミッタ１２０はチューブの吐出口を覆うようにチューブの内壁面に接合される。エミッタ１２０の形状は、チューブの内壁面に密着して吐出口を覆うようにできれば特に限定されない。本実施の形態では、チューブの軸方向に垂直なエミッタ１２０の断面における、内壁面に接合する裏面１２５の形状は、内壁面に沿うように、内壁面に向かって凸の略円弧形状である。エミッタ１２０の大きさは、特に限定されず、吐出口から吐出される灌漑用液体の所望の量に基づいて、適宜決定されればよい。本実施の形態では、エミッタ１２０の長辺方向の長さは１９ｍｍであり、短辺方向の長さは８ｍｍであり、高さは２．７ｍｍである。 The emitter 120 is joined to the inner wall surface of the tube so as to cover the discharge port of the tube. The shape of the emitter 120 is not particularly limited as long as it can be brought into close contact with the inner wall surface of the tube and cover the discharge port. In the present embodiment, the shape of the back surface 125 joined to the inner wall surface in the cross section of the emitter 120 perpendicular to the axial direction of the tube is a substantially arc shape that is convex toward the inner wall surface along the inner wall surface. The size of the emitter 120 is not particularly limited and may be appropriately determined based on a desired amount of irrigation liquid discharged from the discharge port. In the present embodiment, the length of the emitter 120 in the long side direction is 19 mm, the length in the short side direction is 8 mm, and the height is 2.7 mm.

　本実施の形態において、エミッタ１２０は、弾性を有する材料で成形されている。エミッタ１２０の材料の例には、樹脂、エラストマーおよびゴムが含まれる。樹脂の例には、ポリエチレンおよびシリコーンが含まれる。エミッタ１２０の可撓性は、弾性を有する材料の使用によって調整できる。エミッタ１２０の可撓性の調整方法の例には、弾性を有する樹脂の選択、硬質の樹脂材料に対する弾性を有する樹脂の混合比の調整が含まれる。エミッタ１２０の材料の硬度を示す指標としては、ＪＩＳ　Ｋ６２５３－３（２０１２年）において規定されているデュロメータ硬さが含まれる。エミッタ１２０の材料の硬さは、デュロメータ硬さで表すと、Ｄ６０程度である。なお、デュロメータ硬さは、測定に使用するデュロメータの種類によって、タイプＡ、タイプＤ、およびタイプＥなどがある。例えば、タイプＤデュロメータを使用して硬さ６０を示した場合、デュロメータ硬さＤ６０となる。そして、デュロメータ硬さは、各タイプにおける数値が同じ場合、タイプＤが最も硬く、タイプＡ、タイプＥの順に柔らかくなる。本実施の形態では、デュロメータ硬さがＤ６０以下である材料において、台座１２２の変形抑制の効果がより発現する。 In the present embodiment, the emitter 120 is formed of an elastic material. Examples of materials for the emitter 120 include resins, elastomers and rubbers. Examples of resins include polyethylene and silicone. The flexibility of the emitter 120 can be adjusted by using an elastic material. Examples of methods for adjusting the flexibility of the emitter 120 include selecting an elastic resin and adjusting the mixing ratio of the elastic resin to a hard resin material. The index indicating the hardness of the material of the emitter 120 includes the durometer hardness specified in JIS K6253-3 (2012). The hardness of the material of the emitter 120 is about D60 in terms of durometer hardness. The durometer hardness includes type A, type D, type E, and the like, depending on the type of durometer used for measurement. For example, when the hardness 60 is shown using a type D durometer, the durometer hardness D60 is obtained. When the numerical value of each type is the same, the durometer hardness is the hardest in type D, and becomes softer in the order of type A and type E. In the present embodiment, the effect of suppressing the deformation of the pedestal 122 is more exhibited in the material having the durometer hardness of D60 or less.

　図２Ａ、Ｂ、図３Ａ、Ｂに示されるように、エミッタ１２０は、エミッタ本体１２１と、エミッタ本体１２１に収容される台座部１２２と、回転翼１８０とを有する。エミッタ１２０がチューブに接合される前に、回転翼１８０は、台座部１２２に配置され、台座部１２２は、エミッタ本体１２１の収容部１３５に収容される。これにより、回転翼１８０はダイヤフラム部１５３と台座部１２２との間に配置される。エミッタ本体１２１および台座部１２２は、一体として成形されるか、または別体として成形される。また、回転翼１８０は別体として成形されることが好ましい。エミッタ本体１２１と、台座部１２２とを一体成形する方法は、特に限定されない。エミッタ本体１２１と、台座部１２２とを一体成形する場合は、たとえば、エミッタ本体１２１と、台座部１２１と、ヒンジ部１２３が、射出成形により一体成形される。本実施の形態では、エミッタ本体１２１と、台座部１２２とは別体として成形されている。 As shown in FIGS. 2A and 2B and 3A and 3B, the emitter 120 has an emitter main body 121, a pedestal portion 122 housed in the emitter main body 121, and a rotor blade 180. Before the emitter 120 is joined to the tube, the rotor 180 is placed in the pedestal 122, which is housed in the accommodating portion 135 of the emitter body 121. As a result, the rotor 180 is arranged between the diaphragm portion 153 and the pedestal portion 122. The emitter body 121 and the pedestal portion 122 are molded as one or as separate bodies. Further, the rotary blade 180 is preferably formed as a separate body. The method of integrally molding the emitter body 121 and the pedestal portion 122 is not particularly limited. When the emitter body 121 and the pedestal portion 122 are integrally molded, for example, the emitter body 121, the pedestal portion 121, and the hinge portion 123 are integrally molded by injection molding. In the present embodiment, the emitter body 121 and the pedestal portion 122 are molded as separate bodies.

　エミッタ１２０は取水部１３１と、第１接続流路１４２となる第１接続溝１３２と、減圧流路１４３となる減圧溝１３３と、第２接続流路１４４となる第２接続溝１３４とを有する。エミッタ本体１２１のダイヤフラム部１５３と台座部１２２との間に回転翼１８０を配置するようにして、エミッタ本体１２１の収容部１３５に台座部１２２が収容されることによって、流量調整部１３６、流路開閉部１３８および吐出部１３７が形成される。エミッタ本体１２１（エミッタ１２０）の表面１２４には、取水部１３１が開口している。一方、エミッタ本体１２１（エミッタ１２０）の裏面１２５には、第１接続溝１３２、減圧溝１３３、第２接続溝１３４が開口している。台座部１２２の裏面１２５には、排出溝１７２が開口している。 The emitter 120 has a water intake portion 131, a first connection groove 132 as a first connection flow path 142, a pressure reduction groove 133 as a decompression flow path 143, and a second connection groove 134 as a second connection flow path 144. .. The rotary blade 180 is arranged between the diaphragm portion 153 and the pedestal portion 122 of the emitter main body 121, and the pedestal portion 122 is accommodated in the accommodating portion 135 of the emitter main body 121, whereby the flow rate adjusting portion 136 and the flow path An opening / closing portion 138 and a discharge portion 137 are formed. A water intake portion 131 is open on the surface 124 of the emitter body 121 (emitter 120). On the other hand, the back surface 125 of the emitter body 121 (emitter 120) has a first connection groove 132, a pressure reducing groove 133, and a second connection groove 134. A discharge groove 172 is opened on the back surface 125 of the pedestal portion 122.

　エミッタ１２０がチューブに接合されることにより、第１接続溝１３２、減圧溝１３３、第２接続溝１３４は、それぞれ第１接続流路１４２、減圧流路１４３、第２接続流路１４４となる。これにより、取水部１３１、第１接続流路１４２、減圧流路１４３、第２接続流路１４４、流量調整部１３６および吐出部１３７によって構成され、取水部１３１と吐出部１３７とを繋ぐ流路が形成される。流路は、取水部１３１から吐出部１３７まで灌漑用液体を流通させる。 By joining the emitter 120 to the tube, the first connection groove 132, the decompression groove 133, and the second connection groove 134 become the first connection flow path 142, the decompression flow path 143, and the second connection flow path 144, respectively. As a result, it is composed of a water intake section 131, a first connection flow path 142, a decompression flow path 143, a second connection flow path 144, a flow rate adjustment section 136, and a discharge section 137, and a flow path connecting the water intake section 131 and the discharge section 137. Is formed. The flow path allows the irrigation liquid to flow from the intake section 131 to the discharge section 137.

　取水部１３１は、エミッタ本体１２１の表面１２４の半分の領域に配置されている。取水部１３１の数は、特に限定されない。本実施の形態では、１つの取水部１３１が、エミッタ１２０の長軸方向の一方の半面に配置されている（図２Ａ）。取水部１３１が配置されていない表面１２４の領域には、流量調整部１３６および流路開閉部１３８が配置されている（図２Ａ）。取水部１３１は、取水側スクリーン部１７１および取水用貫通孔１４７を有する。 The water intake unit 131 is arranged in a half region of the surface 124 of the emitter body 121. The number of water intake units 131 is not particularly limited. In this embodiment, one water intake unit 131 is arranged on one half surface of the emitter 120 in the long axis direction (FIG. 2A). The flow rate adjusting unit 136 and the flow path opening / closing unit 138 are arranged in the region of the surface 124 where the water intake unit 131 is not arranged (FIG. 2A). The water intake unit 131 has a water intake side screen unit 171 and a water intake through hole 147.

　取水側スクリーン部１７１は、エミッタ１２０に取り入れられる灌漑用液体中の浮遊物が取水用貫通孔１４７に侵入することを防止する。取水側スクリーン部１７１は、チューブ内に開口しており、取水用凹部１７３および凸条１７４を有する。 The water intake side screen portion 171 prevents suspended matter in the irrigation liquid taken into the emitter 120 from entering the water intake through hole 147. The water intake side screen portion 171 is open in the tube and has a water intake recess 173 and a ridge 174.

　取水用凹部１７３は、エミッタ１２０の表面１２４において、ダイヤフラム部１５３が配置されていない一方の半面の領域のほぼ全体に形成されている凹部である。取水用凹部１７３の深さは特に限定されず、エミッタ１２０の大きさによって適宜設定される。取水用凹部１７３の底面上には凸条１７４が形成されている。また、取水用凹部１７３の底面には取水用貫通孔１４７が形成されている。 The water intake recess 173 is a recess formed on the surface 124 of the emitter 120 in almost the entire region of one half surface on which the diaphragm portion 153 is not arranged. The depth of the water intake recess 173 is not particularly limited, and is appropriately set depending on the size of the emitter 120. A ridge 174 is formed on the bottom surface of the water intake recess 173. Further, a water intake through hole 147 is formed on the bottom surface of the water intake recess 173.

　凸条１７４は、取水用凹部１７３の底面上に配置されている。凸条１７４の配置および数は、取水用凹部１７３の開口部側から灌漑用液体を取り入れつつ、灌漑用液体中の浮遊物の侵入を防止できれば特に限定されない。本実施の形態では、複数の凸条１７４が取水用凹部１７３の長軸方向に配列されている。また、取水用凹部１７３の底面には取水用貫通孔１４７が形成されている。 The ridge 174 is arranged on the bottom surface of the water intake recess 173. The arrangement and number of the ridges 174 are not particularly limited as long as the irrigation liquid can be taken in from the opening side of the water intake recess 173 and the intrusion of suspended matter in the irrigation liquid can be prevented. In the present embodiment, a plurality of ridges 174 are arranged in the major axis direction of the water intake recess 173. Further, a water intake through hole 147 is formed on the bottom surface of the water intake recess 173.

　また、凸条１７４は、エミッタ１２０の表面１２４から取水用凹部１７３の底面に向かうにつれて幅が小さくなるように形成されていてもよいし、エミッタ１２０の表面１２４から取水用凹部１７３の底面まで同じ幅に形成されていてもよい。 Further, the ridge 174 may be formed so that the width decreases from the surface 124 of the emitter 120 toward the bottom surface of the water intake recess 173, or the same from the surface 124 of the emitter 120 to the bottom surface of the water intake recess 173. It may be formed in a width.

　取水用貫通孔１４７は、取水用凹部１７３の底面に形成されている。取水用貫通孔１４７の形状および数は、取水用凹部１７３の内部に取り込まれた灌漑用液体をエミッタ本体１２１内に取り込むことができれば特に限定されない。本実施の形態では、取水用貫通孔１４７は、取水用凹部１７３の底面の長軸方向に沿って形成された２つの長孔である。長孔は、複数の凸条１７４により覆われているため、表側から見た場合、２つの取水用貫通孔１４７は、それぞれ多数の貫通孔に分かれているように見える。 The water intake through hole 147 is formed on the bottom surface of the water intake recess 173. The shape and number of the water intake through holes 147 are not particularly limited as long as the irrigation liquid taken into the water intake recess 173 can be taken into the emitter body 121. In the present embodiment, the water intake through hole 147 is two elongated holes formed along the long axis direction of the bottom surface of the water intake recess 173. Since the elongated hole is covered with a plurality of protrusions 174, when viewed from the front side, the two water intake through holes 147 appear to be divided into a large number of through holes.

　チューブ内を流れてきた灌漑用液体は、取水側スクリーン部１７１によって浮遊物が取水用貫通孔１４７内への侵入が防止されつつ、エミッタ１２０内に取り込まれる。 The irrigation liquid that has flowed through the tube is taken into the emitter 120 while the water intake side screen portion 171 prevents suspended matter from entering the water intake through hole 147.

　第１接続溝１３２（第１接続流路１４２）は、取水用貫通孔１４７（取水部１３１）と、減圧溝１３３（減圧流路１４３）とを接続する。第１接続溝１３２は、エミッタ１２０の裏面１２５の外縁部に沿って形成されている。第１接続溝１３２の一方の端部に、減圧溝１３３が接続されている。エミッタ１２０がチューブに接合されることにより、第１接続溝１３２とチューブの内壁面とにより、第１接続流路１４２が形成される。取水部１３１から取り込まれ灌漑用液体は、第１接続流路１４２を通って、減圧流路１４３に流れる。 The first connection groove 132 (first connection flow path 142) connects the water intake through hole 147 (water intake portion 131) and the decompression groove 133 (decompression flow path 143). The first connection groove 132 is formed along the outer edge of the back surface 125 of the emitter 120. A pressure reducing groove 133 is connected to one end of the first connecting groove 132. By joining the emitter 120 to the tube, the first connection flow path 142 is formed by the first connection groove 132 and the inner wall surface of the tube. The irrigation liquid taken in from the water intake section 131 flows to the decompression flow path 143 through the first connection flow path 142.

　減圧溝１３３（減圧流路１４３）は、第１接続溝１３２（第１接続流路１４２）と、第２接続溝１３４（第２接続流路１４４）とを接続する。減圧溝１３３（減圧流路１４３）は、取水部１３１から取り入れられた灌漑用液体の圧力を減圧させて、当該灌漑用液体を流量調整部１３６に向けて導く。減圧溝１３３は、裏面１２５の短軸方向の一方の端部に、長軸方向に沿って配置されている。減圧溝１３３の上流端は第１接続溝１３２に接続されており、下流端には流量調整部１３６に連通した第２接続溝１３４が接続されている。減圧溝１３３の形状は、前述の機能を発揮できれば特に限定されない。本実施の形態では、減圧溝１３３の平面視形状は、ジグザグ形状である。減圧溝１３３は、内側面から突出する略三角柱形状の凸部１７５が灌漑用液体の流れる方向に沿って交互に配置されている。凸部１７５は、平面視したときに、先端が減圧溝１３３の中心軸を超えないように配置されている。チューブおよびエミッタ１２０が接合されることにより、減圧溝１３３とチューブの内壁面により、減圧流路１４３が形成される。取水部１３１から取り込まれた灌漑用液体は、減圧流路１４３により減圧されて流量調整部１３６に導かれる。 The decompression groove 133 (decompression flow path 143) connects the first connection groove 132 (first connection flow path 142) and the second connection groove 134 (second connection flow path 144). The decompression groove 133 (decompression flow path 143) reduces the pressure of the irrigation liquid taken in from the water intake unit 131, and guides the irrigation liquid toward the flow rate adjusting unit 136. The pressure reducing groove 133 is arranged along the major axis direction at one end of the back surface 125 in the minor axis direction. The upstream end of the pressure reducing groove 133 is connected to the first connecting groove 132, and the second connecting groove 134 communicating with the flow rate adjusting unit 136 is connected to the downstream end. The shape of the pressure reducing groove 133 is not particularly limited as long as it can exhibit the above-mentioned functions. In the present embodiment, the plan view shape of the pressure reducing groove 133 is a zigzag shape. In the decompression groove 133, substantially triangular prism-shaped convex portions 175 protruding from the inner side surface are alternately arranged along the direction in which the irrigation liquid flows. The convex portion 175 is arranged so that the tip thereof does not exceed the central axis of the pressure reducing groove 133 when viewed in a plan view. By joining the tube and the emitter 120, the decompression flow path 143 is formed by the decompression groove 133 and the inner wall surface of the tube. The irrigation liquid taken in from the water intake unit 131 is decompressed by the decompression flow path 143 and guided to the flow rate adjusting unit 136.

　第２接続溝１３４（第２接続流路１４４）は、減圧溝１３３（減圧流路１４３）と、切り欠き溝１５０とを接続する。第２接続溝１３４は、エミッタ１２０の裏面１２５側においてエミッタ１２０の長軸方向に沿って直線状に形成された溝である。第２接続溝１３４の上流端は減圧溝１３３に接続されており、第２接続溝１３４の下流端は流量調整部１３６に接続されている。チューブ１１０とエミッタ１２０とが接合されることにより、第２接続溝１３４とチューブの内壁面とによって、第２接続流路１４４が形成される。減圧流路１３３により減圧された灌漑用液体は、第２接続流路１４４を通って、流量調整部１３６に導かれる。 The second connection groove 134 (second connection flow path 144) connects the pressure reducing groove 133 (pressure reduction flow path 143) and the notch groove 150. The second connection groove 134 is a groove formed linearly along the long axis direction of the emitter 120 on the back surface 125 side of the emitter 120. The upstream end of the second connection groove 134 is connected to the pressure reducing groove 133, and the downstream end of the second connection groove 134 is connected to the flow rate adjusting unit 136. By joining the tube 110 and the emitter 120, the second connection flow path 144 is formed by the second connection groove 134 and the inner wall surface of the tube. The irrigation liquid decompressed by the decompression flow path 133 is guided to the flow rate adjusting unit 136 through the second connection flow path 144.

　流量調整部１３６は、流れてきた灌漑用液体の流量を調整する。流量調整部１３６は、エミッタ１２０の取水部１３１が配置されていない領域に配置されている。流量調整部１３６は、収容部１３５と、台座１６１と、連通孔１５１と、ダイヤフラム部１５３と、回転翼１８０とを含む。また、台座部１２２は、台座１６１、連通孔１５１と、連絡溝１６２とを有する。本実施の形態では、台座部１２２は変形抑制部１５２を有する。回転翼１８０は、台座部１２２とダイヤフラム部１５３との間に位置するように収容部１３５内に配置されている。回転翼１８０は、台座１６１の周りを回転できるように配置されている。 The flow rate adjusting unit 136 adjusts the flow rate of the flowing irrigation liquid. The flow rate adjusting unit 136 is arranged in a region where the water intake unit 131 of the emitter 120 is not arranged. The flow rate adjusting unit 136 includes an accommodating unit 135, a pedestal 161, a communication hole 151, a diaphragm portion 153, and a rotary blade 180. Further, the pedestal portion 122 has a pedestal 161 and a communication hole 151, and a connecting groove 162. In the present embodiment, the pedestal portion 122 has a deformation suppressing portion 152. The rotor 180 is arranged in the accommodating portion 135 so as to be located between the pedestal portion 122 and the diaphragm portion 153. The rotor 180 is arranged so that it can rotate around the pedestal 161.

　収容部１３５には、第２接続流路１４３から流れてきた灌漑用液体がチューブの吐出口から吐出される量を調整するための台座１６１を有する台座部１２２が収容される。また、収容部１３５には、回転翼１８０も収容される。収容部１３５に台座部１２２および回転翼１８０が収容された後に、エミッタ１２０はチューブの内壁面に接合される。 The accommodating portion 135 accommodates a pedestal portion 122 having a pedestal 161 for adjusting the amount of the irrigation liquid flowing from the second connecting flow path 143 discharged from the discharge port of the tube. The rotor 180 is also accommodated in the accommodating portion 135. After the pedestal portion 122 and the rotor blade 180 are accommodated in the accommodating portion 135, the emitter 120 is joined to the inner wall surface of the tube.

　台座１６１は、灌漑用液体の圧力により変形したダイヤフラム部１５３が接触する領域である。台座１６１の形状は、特に限定されない。台座１６１の形状は、曲面であってもよいし、平面であってもよい。本実施の形態では台座１６１の形状は平面である。 The pedestal 161 is a region where the diaphragm portion 153 deformed by the pressure of the irrigation liquid comes into contact. The shape of the pedestal 161 is not particularly limited. The shape of the pedestal 161 may be a curved surface or a flat surface. In the present embodiment, the shape of the pedestal 161 is a flat surface.

　連通孔１５１は、収容部１３５内に流入した灌漑用液体を吐出口１３７に向けて排出するために使用される。本実施の形態では、連通孔１５１は、台座１６１の中央部分に開口している。連通孔１５１の開口部の大きさも特に限定されず、適宜設定できる。 The communication hole 151 is used to discharge the irrigation liquid that has flowed into the accommodating portion 135 toward the discharge port 137. In the present embodiment, the communication hole 151 is opened in the central portion of the pedestal 161. The size of the opening of the communication hole 151 is not particularly limited and can be set as appropriate.

　連絡溝１６２は、台座１６１にダイヤフラム部１５３が接触した状態でも灌漑用液体を連通孔１５１に導くための溝である。連絡溝１６２の一方の端部は、連通孔１５１に連絡している。連絡溝１６２の他方の端部は、ダイヤフラム部１５３が台座１６１に接触している状態における台座１６１の接触領域の外縁部の外側に配置されている。 The connecting groove 162 is a groove for guiding the irrigation liquid to the communication hole 151 even when the diaphragm portion 153 is in contact with the pedestal 161. One end of the connecting groove 162 communicates with the communication hole 151. The other end of the connecting groove 162 is arranged outside the outer edge of the contact area of the pedestal 161 in a state where the diaphragm portion 153 is in contact with the pedestal 161.

　変形抑制部１５２は、ダイヤフラム部１５３が灌漑用液体の圧力を受けて台座１６１に接触しているときに、チューブに接触して、台座１６１の変形を抑制する。変形抑制部１５２は、灌漑用液体の圧力を受けて変形したダイヤフラム部１５３が接触する台座１６１の面と反対側の面から突出して配置されている。変形抑制部１５２は、吐出口１３７側の連通孔１５１の開口部の周囲に配置されている。変形抑制部１５２の形状は、台座１６１の変形を抑制できれば限定されない。変形抑制部１５２の高さは、チューブに配置したときに、チューブの内壁面に接触する高さであってもよいし、チューブの内壁面に接触しない高さであってもよい。 The deformation suppressing portion 152 contacts the tube when the diaphragm portion 153 is in contact with the pedestal 161 under the pressure of the irrigation liquid to suppress the deformation of the pedestal 161. The deformation suppressing portion 152 is arranged so as to project from a surface opposite to the surface of the pedestal 161 to which the diaphragm portion 153 deformed under the pressure of the irrigation liquid comes into contact. The deformation suppressing portion 152 is arranged around the opening of the communication hole 151 on the discharge port 137 side. The shape of the deformation suppressing portion 152 is not limited as long as the deformation of the pedestal 161 can be suppressed. The height of the deformation suppressing portion 152 may be a height that contacts the inner wall surface of the tube when placed on the tube, or may be a height that does not contact the inner wall surface of the tube.

　エミッタ１２０がチューブの内壁面に接合されたとき、収容部１３５に配置された台座部１２２と、台座１６１に対向したダイヤフラム部１５３とによって、チューブ内の灌漑用液体の圧力に応じて、エミッタ１２０（台座１６１）の連通孔１５１から吐出される灌漑用液体の流量を調整するための流量調整部１３６が構成される。本実施の形態では、ダイヤフラム部１５３の平面視形状は円形状である。本実施の形態において、ダイヤフラム部１５３は、エミッタ本体１２１の他の構成と一体に成形されている。 When the emitter 120 is joined to the inner wall surface of the tube, the pedestal portion 122 arranged in the accommodating portion 135 and the diaphragm portion 153 facing the pedestal 161 make the emitter 120 depending on the pressure of the irrigation liquid in the tube. A flow rate adjusting unit 136 for adjusting the flow rate of the irrigation liquid discharged from the communication hole 151 of the (pedestal 161) is configured. In the present embodiment, the diaphragm portion 153 has a circular shape in a plan view. In the present embodiment, the diaphragm portion 153 is integrally formed with another configuration of the emitter body 121.

　ダイヤフラム部１５３は、エミッタ本体１２１の他の構成と一体に成形されているため、可撓性を有する。ダイヤフラム部１５３はエミッタ１２０がチューブの内壁面に接合された状態において、チューブ内の灌漑用液体の圧力によって台座１６１に向かって変形する。 The diaphragm portion 153 is flexible because it is integrally molded with the other configuration of the emitter body 121. The diaphragm portion 153 is deformed toward the pedestal 161 by the pressure of the irrigation liquid in the tube in a state where the emitter 120 is joined to the inner wall surface of the tube.

　前述したように、エミッタ本体１２１および台座部１２２は、ヒンジ部１２３を介して接続された状態で製造されてもよい。この場合、ヒンジ部１２３は、エミッタ１２０の製造時において、エミッタ本体１２１および台座部１２２を接続する。ヒンジ部１２３の形状および大きさは、前述の機能を発揮できる範囲内において適宜に設定できる。ヒンジ部１２３は裏面１２５と連続した側面１２６に接続されてもよいし、エミッタ本体１２１の長軸方向（灌漑用液体が流れる方向における）の両端に位置する側面に配置されてもよいし、エミッタ本体１２１の短軸方向の両端に位置する側面１２６に配置されていてもよい。ヒンジ部１２３は、灌漑用液体の流れを阻害しない観点から、灌漑用液体が流れる方向における上流側または下流側の側面１２６に接続されていることが好ましい。 As described above, the emitter body 121 and the pedestal portion 122 may be manufactured in a state of being connected via the hinge portion 123. In this case, the hinge portion 123 connects the emitter body 121 and the pedestal portion 122 at the time of manufacturing the emitter 120. The shape and size of the hinge portion 123 can be appropriately set within a range in which the above-mentioned functions can be exhibited. The hinge portion 123 may be connected to the side surface 126 continuous with the back surface 125, may be arranged on the side surface located at both ends in the long axis direction (in the direction in which the irrigation liquid flows) of the emitter body 121, or may be arranged on the side surface of the emitter. It may be arranged on the side surface 126 located at both ends in the minor axis direction of the main body 121. From the viewpoint of not obstructing the flow of the irrigation liquid, the hinge portion 123 is preferably connected to the side surface 126 on the upstream side or the downstream side in the direction in which the irrigation liquid flows.

　ヒンジ部１２３は、台座部１２２を収容部１３５に収容するとき、折り曲げられもよいし、エミッタ本体１２１および台座部１２２から切り離されてもよい。ヒンジ部１２３は、エミッタ本体１２１の裏面１２５に形成された溝１６４に収容される。ヒンジ部１２３がエミッタ本体１２１の裏面１２５に形成された溝１６４に収容された状態で、エミッタ１２０の裏面１２５がチューブの内壁面に対して適切に接合される。 The hinge portion 123 may be bent or may be separated from the emitter main body 121 and the pedestal portion 122 when the pedestal portion 122 is accommodated in the accommodating portion 135. The hinge portion 123 is housed in a groove 164 formed in the back surface 125 of the emitter body 121. The back surface 125 of the emitter 120 is appropriately joined to the inner wall surface of the tube in a state where the hinge portion 123 is housed in the groove 164 formed in the back surface 125 of the emitter body 121.

　溝１６４は、台座部１２２を収容部１３５に収容する際に、切断されたヒンジ部１２３を収容される。溝１６４の形状は、ヒンジ部１２３を収容でき、かつ灌漑用液体が漏れ出さなければ特に限定されない。本実施の形態では、溝１６４は、ヒンジ部１２３よりも僅かに小さく形成されている。エミッタ１２０をチューブに接合するときには、台座１６１を収容部１３５に収容するとともに、ヒンジ部１２３を溝１６４に収容する。このとき、溝１６４はヒンジ部１２３よりも僅かに小さく形成されているため、溝１６４に対してヒンジ部１２３を圧入しながら収容する。 The groove 164 accommodates the hinge portion 123 that has been cut when the pedestal portion 122 is accommodated in the accommodating portion 135. The shape of the groove 164 is not particularly limited as long as the hinge portion 123 can be accommodated and the irrigation liquid does not leak out. In the present embodiment, the groove 164 is formed to be slightly smaller than the hinge portion 123. When the emitter 120 is joined to the tube, the pedestal 161 is accommodated in the accommodating portion 135, and the hinge portion 123 is accommodated in the groove 164. At this time, since the groove 164 is formed to be slightly smaller than the hinge portion 123, the hinge portion 123 is housed while being press-fitted into the groove 164.

　回転翼１８０は、台座部１２２とダイヤフラム部１５３との間に配置され、台座１６１の周りを回転するように構成されている。第２接続流路１４４を流れてきた灌漑用液体は、切り欠き溝１５０を通じてダイヤフラム部１５３と台座部１２２との間に流れ込む。回転翼１８０は、流れ込んできた灌漑用液体によって回転し、例えば台座部１２２上にある土などを巻き上げる。これにより、回転翼１８０は土などが収容部１３５内に堆積することを抑制し、エミッタ内で目詰まりが生じることを抑制する。 The rotor blade 180 is arranged between the pedestal portion 122 and the diaphragm portion 153, and is configured to rotate around the pedestal portion 161. The irrigation liquid that has flowed through the second connecting flow path 144 flows between the diaphragm portion 153 and the pedestal portion 122 through the notch groove 150. The rotor 180 is rotated by the irrigation liquid that has flowed in, and winds up, for example, soil on the pedestal portion 122. As a result, the rotary blade 180 suppresses the accumulation of soil and the like in the accommodating portion 135, and suppresses the occurrence of clogging in the emitter.

　図４Ａ～Ｅは、回転翼１８０の構成を示す図である。図４Ａは、図３Ｂに示される回転翼１８０の平面図であり、図４Ｂは、図３Ｂに示される回転翼１８０の正面図である。図４Ｃは、別の回転翼１８０の平面図であり、図４Ｄは、さらに別の回転翼１８０の平面図であり、図４Ｅは、さらに別の回転翼１８０の平面図である。 FIGS. 4A to 4E are diagrams showing the configuration of the rotary blade 180. 4A is a plan view of the rotor 180 shown in FIG. 3B, and FIG. 4B is a front view of the rotor 180 shown in FIG. 3B. 4C is a plan view of another rotor 180, FIG. 4D is a plan view of yet another rotor 180, and FIG. 4E is a plan view of yet another rotor 180.

　図４Ａ～Ｅに示されるように、回転翼１８０は、複数の羽根１８１と、複数の羽根１８１を支えるための支持部１８２とを有する。また、図４Ｂに示されるように、回転翼１８０の中心軸（回転軸）に沿う方向において、支持部１８２の厚さは、羽根１８１の厚さより大きい。これにより、支持部１８２は台座部１２２とは接触するのに対し、羽根１８１は台座部１２２と接触しない。これにより、回転翼１８０は、流れ込んできた灌漑用液体によって回転しやすくなる。 As shown in FIGS. 4A to 4E, the rotary blade 180 has a plurality of blades 181 and a support portion 182 for supporting the plurality of blades 181. Further, as shown in FIG. 4B, the thickness of the support portion 182 is larger than the thickness of the blade 181 in the direction along the central axis (rotation axis) of the rotary blade 180. As a result, the support portion 182 comes into contact with the pedestal portion 122, while the blades 181 do not come into contact with the pedestal portion 122. As a result, the rotor 180 is easily rotated by the irrigation liquid that has flowed in.

　支持部１８２の数は、特に限定されず、１つであってもよいし、複数であってもよい。図４Ａ、Ｄ、Ｅに示される例では、回転翼１８０は、１つの支持部１８２を有している。図４Ｃに示される例では、回転翼１８０は、２つの支持部１８２を有している。また、支持部１８２の位置も限定されない。図４Ａ、Ｃに示される例では、支持部１８２は、回転翼１８０の中心軸（回転軸）側に配置されている。図４Ｃ、Ｄに示される例では、支持部１８２は、回転翼１８０の外周側に配置されている。また、図４Ｅに示される例では、支持部１８２は、回転翼１８０の中心部と外周部との中間地点に配置されている。 The number of support portions 182 is not particularly limited, and may be one or a plurality. In the example shown in FIGS. 4A, D, E, the rotor 180 has one support 182. In the example shown in FIG. 4C, the rotor 180 has two supports 182. Further, the position of the support portion 182 is not limited. In the example shown in FIGS. 4A and 4C, the support portion 182 is arranged on the central axis (rotation axis) side of the rotary blade 180. In the example shown in FIGS. 4C and 4D, the support portion 182 is arranged on the outer peripheral side of the rotary blade 180. Further, in the example shown in FIG. 4E, the support portion 182 is arranged at an intermediate point between the central portion and the outer peripheral portion of the rotary blade 180.

　吐出部１３７は、連通孔１５１からの灌漑用液体を一時的に貯留する。吐出部１３７に到達した灌漑用液体は、吐出部１３７から外部に排出させる。 The discharge unit 137 temporarily stores the irrigation liquid from the communication hole 151. The irrigation liquid that has reached the discharge unit 137 is discharged to the outside from the discharge unit 137.

　（エミッタの動作）
　ここで、チューブ１１０内の灌漑用液体の圧力に応じた流量調整部１３６の動作について説明する。 (Operation of emitter)
Here, the operation of the flow rate adjusting unit 136 according to the pressure of the irrigation liquid in the tube 110 will be described.

　チューブ１１０内に灌漑用液体が送液される前は、ダイヤフラム部１５３に灌漑用液体の圧力が加わらないため、ダイヤフラム部１５３は変形していない。 Before the irrigation liquid was sent into the tube 110, the diaphragm portion 153 was not deformed because the pressure of the irrigation liquid was not applied to the diaphragm portion 153.

　チューブ１１０内に灌漑用液体を送液し始めると、流量調整部１３６のダイヤフラム部１５３は、台座１６１に向かって変形し始める。この状態では、ダイヤフラム部１５３が台座１６１から離れているため、取水部１３１から取り入れられた灌漑用液体は、流量調整部１３６で流量をほとんど調整されることなくチューブ１１０の吐出口１１１から外部に吐出される。 When the irrigation liquid is started to be sent into the tube 110, the diaphragm portion 153 of the flow rate adjusting portion 136 starts to be deformed toward the pedestal 161. In this state, since the diaphragm portion 153 is separated from the pedestal 161, the irrigation liquid taken in from the water intake portion 131 is discharged from the discharge port 111 of the tube 110 to the outside with almost no adjustment of the flow rate by the flow rate adjusting portion 136. It is discharged.

　また、この状態で、台座部１２２とダイヤフラム部１５３との間に配置されている回転翼１８０は、流れてきた灌漑用液体によって回転し始め、台座部１２２に堆積していた土などを巻き上げる。巻き上げられた土は、灌漑用液体と共に外部に吐出される。 Further, in this state, the rotor blade 180 arranged between the pedestal portion 122 and the diaphragm portion 153 starts to rotate due to the flowing irrigation liquid, and winds up the soil and the like accumulated on the pedestal portion 122. The rolled up soil is discharged to the outside together with the irrigation liquid.

　チューブ内の灌漑用液体の圧力が高まると、ダイヤフラム部１５３が台座１６１に向かってさらに変形し、連絡孔１５１に接近し始める。このように、チューブ内の灌漑用液体の圧力がダイヤフラム部１５３をある程度変形させるほど高くなると、ダイヤフラム部１５３が台座１６１に接近し、ダイヤフラム部１５３と台座１６１との間を流れる灌漑用液体の量が減る。すなわち、取水部１３１から取り入れられた灌漑用液体は、流量調整部１３６で流量を調整された上でチューブ１１０の吐出口１１１から外部に吐出される。 When the pressure of the irrigation liquid in the tube increases, the diaphragm portion 153 further deforms toward the pedestal 161 and begins to approach the connecting hole 151. As described above, when the pressure of the irrigation liquid in the tube becomes high enough to deform the diaphragm portion 153 to some extent, the diaphragm portion 153 approaches the pedestal 161 and the amount of the irrigation liquid flowing between the diaphragm portion 153 and the pedestal 161. Is reduced. That is, the irrigation liquid taken in from the water intake unit 131 is discharged to the outside from the discharge port 111 of the tube 110 after the flow rate is adjusted by the flow rate adjusting unit 136.

　この状態でも、回転翼１８０は、ダイヤフラム部１５３と台座部１２２との間で回転し続け、土などが堆積することを抑制する。 Even in this state, the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.

　チューブ内の灌漑用液体の圧力がさらに高くなると、ダイヤフラム部１５３が台座１６１に向かってさらに変形し、台座１６１に接触して連絡孔１５１を閉塞する。しかし、連絡溝１６２は閉塞されないため、灌漑用液体は連絡溝１６２を流れて連絡孔１５１から吐出部１３７へ到達し、一定量は吐出される。すなわち、取水部１３１から取り入れられた灌漑用液体は、流量調整部１３６で流量を大きく調整された上でチューブ１１０の吐出口１１１から外部に吐出される。 When the pressure of the irrigation liquid in the tube becomes higher, the diaphragm portion 153 further deforms toward the pedestal 161 and comes into contact with the pedestal 161 to close the connecting hole 151. However, since the connecting groove 162 is not blocked, the irrigation liquid flows through the connecting groove 162 and reaches the discharging portion 137 from the connecting hole 151, and a certain amount is discharged. That is, the irrigation liquid taken in from the water intake unit 131 is discharged to the outside from the discharge port 111 of the tube 110 after the flow rate is largely adjusted by the flow rate adjusting unit 136.

　この状態でも、回転翼１８０は、ダイヤフラム部１５３と台座部１２２との間で回転し続け、土などが堆積することを抑制する。 Even in this state, the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.

　灌漑用液体の圧力が設定値を超えると、さらにダイヤフラム部１５３の変形量が増大し、ダイヤフラム部１５３が台座１６１と密着する。このような場合でも変形抑制部により台座の変形が抑制される。具体的には、変形抑制部１５２の底面がチューブの内壁面に接触することにより生じる反力で、ダイヤフラム部１５３による台座１６１への圧力を打ち消している。 When the pressure of the irrigation liquid exceeds the set value, the amount of deformation of the diaphragm portion 153 further increases, and the diaphragm portion 153 comes into close contact with the pedestal 161. Even in such a case, the deformation of the pedestal is suppressed by the deformation suppressing portion. Specifically, the reaction force generated when the bottom surface of the deformation suppressing portion 152 comes into contact with the inner wall surface of the tube cancels the pressure on the pedestal 161 by the diaphragm portion 153.

　この状態でも、回転翼１８０は、ダイヤフラム部１５３と台座部１２２との間で回転し続け、土などが堆積することを抑制する。 Even in this state, the rotor blade 180 continues to rotate between the diaphragm portion 153 and the pedestal portion 122, and suppresses the accumulation of soil and the like.

　なお、回転翼１８０は灌漑用液体の流れが強いときのみに回転し、堆積していた土などを巻き上げてもよい。巻き上げられた土などは、灌漑用液体の流れにのりエミッタ外に排出される。 The rotor blade 180 may rotate only when the flow of the irrigation liquid is strong, and may wind up the accumulated soil or the like. The soil that has been rolled up is discharged to the outside of the emitter by the flow of irrigation liquid.

　このように、本実施の形態に係るエミッタ１２０では、回転翼１８０が流量調整部１３６内で回転するため、エミッタ１２０内（特に流量調整部１３６内）に土などが入り込んでしまっても、エミッタ１２０内（特に流量調整部１３６内）に土などが堆積することが抑制される。 As described above, in the emitter 120 according to the present embodiment, since the rotor 180 rotates in the flow rate adjusting unit 136, even if dirt or the like gets into the emitter 120 (particularly in the flow rate adjusting unit 136), the emitter Accumulation of soil or the like in 120 (particularly in the flow rate adjusting unit 136) is suppressed.

　（効果）
　本発明によれば、何らかの理由でエミッタ１２０内に細かい土などが入り込んでしまっても、エミッタ１２０内における目詰まりの発生を抑制することができる。 (effect)
According to the present invention, even if fine soil or the like gets into the emitter 120 for some reason, it is possible to suppress the occurrence of clogging in the emitter 120.

　（変形例）
　上述の実施の形態では、エミッタ本体１２１に、台座部１２２が収容され、エミッタ本体１２１のダイヤフラム部１５３と台座部１２２との間に回転翼１８０が配置される例を示して説明したが、これに限定されない。例えば、エミッタ本体と台座が一体成形され、ダイヤフラム部が別体（例えば、弾性を有するフィルムなど）であって、これらを接合することでエミッタを構成してもよい。すなわち、エミッタは、エミッタ本体と、ダイヤフラム部と、回転翼とを有する構成であってもよい。この場合、エミッタ本体は、取水部と、減圧流路溝と、台座と、台座が配置されるエミッタ本体の表面側に開口する凹部と、吐出口に向けて灌漑用液体を排出する連通孔と、を有する。そして、ダイヤフラム部は、エミッタ本体の表面において、表面側に開口する凹部を塞ぐように弾性を有するフィルム等が接合されることで形成される。さらに、回転翼は、台座の周りを回転するように配置される。 (Modification)
In the above-described embodiment, the pedestal portion 122 is housed in the emitter main body 121, and the rotary blade 180 is arranged between the diaphragm portion 153 and the pedestal portion 122 of the emitter main body 121. Not limited to. For example, the emitter body and the pedestal may be integrally molded, and the diaphragm portion may be a separate body (for example, an elastic film), and the emitter may be formed by joining these. That is, the emitter may have a configuration including an emitter body, a diaphragm portion, and a rotor blade. In this case, the emitter body includes a water intake, a decompression flow path groove, a pedestal, a recess that opens on the surface side of the emitter body where the pedestal is arranged, and a communication hole that discharges irrigation liquid toward the discharge port. Has. The diaphragm portion is formed by joining a film or the like having elasticity on the surface of the emitter body so as to close the concave portion that opens on the surface side. In addition, the rotors are arranged to rotate around the pedestal.

　このような構成とすることで、上述の実施の形態と同様の理由から、何らかの理由でエミッタ内に細かい土などが入り込んでしまっても、エミッタ内における目詰まりの発生を抑制することができる。 With such a configuration, for the same reason as in the above-described embodiment, even if fine soil or the like gets into the emitter for some reason, it is possible to suppress the occurrence of clogging in the emitter.

　本出願は、２０１９年３月１２日出願の特願２０１９－０４４７４６に基づく優先権を主張する。当該出願明細書および図面に記載された内容は、すべて本願明細書に援用される。 This application claims priority based on Japanese Patent Application No. 2019-044746 filed on March 12, 2019. The contents described in the application specification and drawings are incorporated herein by reference.

　本発明によれば、目詰まりを抑制することができるエミッタおよび当該エミッタを用いる点滴灌漑用チューブを提供できる。したがって、エミッタおよび当該エミッタを用いる点滴灌漑用チューブのさらなる普及が期待される。 According to the present invention, it is possible to provide an emitter capable of suppressing clogging and a drip irrigation tube using the emitter. Therefore, it is expected that the emitter and the drip irrigation tube using the emitter will be further spread.

　１００　点滴灌漑用チューブ
　１１０　チューブ
　１１１　吐出口
　１１２　内壁面
　１２０　エミッタ
　１２１　エミッタ本体
　１２２　台座部
　１２３　ヒンジ部
　１２４　表面
　１２５　裏面
　１２６　側面
　１３１　取水部
　１３２　第１接続溝
　１３３　減圧溝
　１３４　第２接続溝
　１３５　収容部
　１３６　流量調整部
　１３７　吐出部
　１３８　流路開閉部
　１４２　第１接続流路
　１４３　減圧流路
　１４４　第２接続流路
　１４７　取水用貫通孔
　１５０　切り欠き溝
　１５１　連通孔
　１５２　変形抑制部
　１５３　ダイヤフラム部
　１６１　台座
　１６２　連絡溝
　１６４　溝
　１７１　取水側スクリーン部
　１７２　排出溝
　１７３　取水用凹部
　１７４　凸条
　１７５　凸部
　１８０　回転翼
　１８１　羽根
　１８２　支持部 100 Drip irrigation tube 110 Tube 111 Discharge port 112 Inner wall surface 120 Emitter 121 Emitter body 122 Pedestal part 123 Hinge part 124 Front surface 125 Back surface 126 Side surface 131 Water intake part 132 First connection groove 133 Decompression groove 134 Second connection groove 135 Storage part 136 Flow rate adjustment part 137 Discharge part 138 Flow path opening / closing part 142 1st connection flow path 143 Decompression flow path 144 2nd connection flow path 147 Water intake through hole 150 Notch groove 151 Communication hole 152 Deformation suppression part 153 Diaphragm part 161 Pedestal 162 Communication Groove 164 Groove 171 Water intake side screen part 172 Discharge groove 173 Water intake recess 174 Convex 175 Convex 180 Rotor blade 181 Blade 182 Support

Claims (5)

　灌漑用液体を流通させるチューブの内壁面における、前記チューブの内外を連通する吐出口に対応する位置に接合されて前記チューブ内の前記灌漑用液体を前記吐出口から定量的に前記チューブ外に吐出するためのエミッタであって、
　エミッタ本体と、前記エミッタ本体に収容される台座部と、回転翼と、を有し、
　前記エミッタ本体は、
　前記灌漑用液体を取り入れるための取水部と、
　前記取水部に連通し、前記灌漑用液体を減圧させながら流す減圧流路を形成するための減圧流路溝と、
　前記減圧流路溝に連通し、前記台座部を収容するための収容部と、
　可撓性を有し、前記台座部を前記収容部に収容した状態で、前記チューブ内の灌漑用液体の圧力を受けたときに前記台座部に向かって変形するダイヤフラム部と、を有し、
　前記台座部は、
　前記チューブ内の灌漑用液体の圧力を受けた前記ダイヤフラム部が接触する台座と、
　一方の開口部が前記台座に開口し、前記減圧流路溝から前記収容部内に流入した灌漑用液体を前記吐出口に向けて排出するための連通孔と、を有し、
　前記回転翼は、前記ダイヤフラム部と前記台座部との間に配置され、前記台座の周りを回転するように構成されている、
　エミッタ。 On the inner wall surface of the tube through which the irrigation liquid flows, the irrigation liquid in the tube is quantitatively discharged from the discharge port to the outside of the tube by being joined at a position corresponding to a discharge port communicating the inside and outside of the tube. Emitter for irrigation
It has an emitter body, a pedestal portion housed in the emitter body, and a rotor blade.
The emitter body is
The intake part for taking in the irrigation liquid and
A decompression channel groove for forming a decompression channel that communicates with the water intake and allows the irrigation liquid to flow while depressurizing.
An accommodating portion that communicates with the decompression flow path groove and accommodates the pedestal portion,
It has a diaphragm portion that is flexible and deforms toward the pedestal portion when the pedestal portion is housed in the housing portion and is subjected to the pressure of the irrigation liquid in the tube.
The pedestal is
The pedestal in contact with the diaphragm portion under the pressure of the irrigation liquid in the tube,
One opening opens in the pedestal and has a communication hole for discharging the irrigation liquid flowing into the accommodating portion from the decompression flow path groove toward the discharge port.
The rotor blades are arranged between the diaphragm portion and the pedestal portion, and are configured to rotate around the pedestal.
Emitter. 　前記回転翼は、複数の羽根と、複数の前記羽根を支えるための支持部と、を有する、請求項１に記載のエミッタ。 The emitter according to claim 1, wherein the rotary blade has a plurality of blades and a support portion for supporting the plurality of blades. 　前記回転翼の中心軸に沿う方向において、前記支持部の厚さは、前記羽根の厚さより大きく、
　前記回転翼は、前記支持部は前記台座部と接触し、かつ前記羽根は前記台座部と接触しないように構成される、
　請求項２に記載のエミッタ。 In the direction along the central axis of the rotary blade, the thickness of the support portion is larger than the thickness of the blade.
The rotor blade is configured such that the support portion is in contact with the pedestal portion and the blades are not in contact with the pedestal portion.
The emitter according to claim 2. 　前記台座部は、灌漑用液体の圧力を受けて変形した前記ダイヤフラム部が接触する前記台座と反対側の面から突出して配置され、前記ダイヤフラム部が灌漑用液体の圧力を受けて前記台座に接触しているときに、前記チューブに接触して、前記台座の前記灌漑用液体の圧力による変形を抑制するための変形抑制部をさらに有する、請求項１～請求項３のいずれか一項に記載のエミッタ。 The pedestal portion is arranged so as to project from the surface opposite to the pedestal with which the diaphragm portion deformed by the pressure of the irrigation liquid comes into contact, and the diaphragm portion comes into contact with the pedestal under the pressure of the irrigation liquid. The invention according to any one of claims 1 to 3, further comprising a deformation suppressing portion for suppressing deformation of the pedestal due to pressure by contacting the tube while the irrigation liquid is being used. Emitter. 　灌漑用液体を吐出するための吐出口を有するチューブと、
　前記チューブの内壁面の前記吐出口に対応する位置に接合された、請求項１～請求項４のいずれか一項に記載のエミッタと、を有する、
　点滴灌漑用チューブ。 A tube with a discharge port for discharging irrigation liquid,
The emitter according to any one of claims 1 to 4, which is joined to a position corresponding to the discharge port on the inner wall surface of the tube.
Drip irrigation tube.
PCT/JP2020/009619 2019-03-12 2020-03-06 Emitter and drip irrigation tube Ceased WO2020184419A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019044746A JP2020145945A (en) 2019-03-12 2019-03-12 Emitter and drip irrigation tube
JP2019-044746 2019-03-12

Publications (1)

Publication Number Publication Date
WO2020184419A1 true WO2020184419A1 (en) 2020-09-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138452B2 (en) * 1972-11-30 1976-10-21
JPS59183848A (en) * 1983-02-22 1984-10-19 レイモンド・ジエイ・ナカチヤン Irrigation sprinkler
JP2018046770A (en) * 2016-09-21 2018-03-29 株式会社エンプラス Emitter and drip irrigation tube
US20180343813A1 (en) * 2017-06-06 2018-12-06 Dlhbowles, Inc. Clog resistant in-line vortex element irrigation emitter
JP2018201426A (en) * 2017-06-06 2018-12-27 株式会社エンプラス Emitter and tube for drip arid comprising emitter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138452B2 (en) * 1972-11-30 1976-10-21
JPS59183848A (en) * 1983-02-22 1984-10-19 レイモンド・ジエイ・ナカチヤン Irrigation sprinkler
JP2018046770A (en) * 2016-09-21 2018-03-29 株式会社エンプラス Emitter and drip irrigation tube
US20180343813A1 (en) * 2017-06-06 2018-12-06 Dlhbowles, Inc. Clog resistant in-line vortex element irrigation emitter
JP2018201426A (en) * 2017-06-06 2018-12-27 株式会社エンプラス Emitter and tube for drip arid comprising emitter

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