JP6655874B2 - Chemical solution tank and boom sprayer using the same - Google Patents

Description

  The present invention relates to a chemical tank and a boom sprayer using the same, and for example, relates to a chemical tank for storing a chemical such as an agricultural chemical sprayed on crops, and a boom sprayer for spraying the chemical stored in the chemical tank.

  2. Description of the Related Art A boom sprayer (also referred to as a chemical sprayer or a boom sprayer) is conventionally known as a machine for spraying a chemical such as a pesticide or a herbicide in a field such as a paddy field or a field. The boom sprayer includes a boom extending laterally with respect to the traveling direction of the traveling machine, and a plurality of spray nozzles arranged along a longitudinal direction of the boom in a traveling process in a field to a chemical solution tank. By spraying (spraying) the stored medicine in a mist state, the medicine can be efficiently sprayed over a wide range corresponding to the boom length.

  The boom sprayer generally includes a mechanism that folds the boom to a predetermined storage position when not working (when not spraying a medicine). Various forms of the folding mechanism are known, but as a relatively simple mechanism, a boom extending laterally with respect to the traveling direction of the traveling body is arranged along the traveling direction of the traveling body. Mechanisms that fold approximately 90 degrees in the direction are known. Also, when the boom is folded in the direction along the traveling direction of the traveling body in this way, the tip of the boom should be moved backward in consideration of interference with the traveling body, getting on and off the traveling body, and storing in the warehouse. It is known that the boom is folded obliquely upward or forward diagonally upward, that is, inclined forward or backward with respect to the traveling direction of the traveling body (see Patent Documents 1 and 2).

  In addition, the boom sprayer includes a self-propelled boom sprayer in which a traveling body, a boom, and a chemical solution tank are integrally mounted (Patent Document 1), and a boom and a chemical solution tank behind a traveling body such as a tractor. Mounted boom sprayers mounted (mounted), and traction type boom sprayers (Patent Documents 2 and 3), which use a tractor or other traveling machine to pull a boom or chemical tank, are used for various applications. It is also known that a towed boom sprayer is generally used to replace the working part in order to perform the work.

  In this type of boom sprayer, an injection port is generally provided at the ceiling of a chemical tank, and in a state where the boom is folded and stored as described above (when not working), a chemical solution (drug is added to water) through the injection port. Is performed (injection). In addition, in order to replace or clean the strainer provided at the inlet, an attaching / detaching operation of attaching / detaching the strainer from the inlet, a cleaning operation of cleaning the inside of the chemical solution tank, and the like are also performed.

  In order to ensure the operability of such a chemical solution injection operation and a strainer attaching / detaching operation, in a conventional boom sprayer, a floor as a working table is arranged around a chemical solution tank. For example, in the self-propelled boom sprayer described in Patent Document 1, a side floor is provided so as to protrude to the side of the body frame, and in the towed boom sprayer described in Patent Document 3, the front part of the body frame is used. A floor is provided above a traction device (such as a universal shaft) provided in the vehicle. The worker ascends to the floor via the elevating step provided toward the floor, opens the lid for closing the injection port provided on the ceiling from there, and performs the above-described chemical liquid injection operation. And the work of attaching and detaching the strainer.

JP 2014-076789 A JP 2013-252105A JP 2014093977 A

  By the way, in recent years, for the purpose of improving the efficiency of agricultural work, for example, the above-mentioned towed boom sprayer is used, and a large field is sprayed with a pesticide or the like using a large boom to collectively manage the large field. Agricultural forms are being studied. In such an agricultural form, the capacity of the chemical solution tank is increased to cope with the large boom as described above, and the outer shape such as the height of the chemical solution tank is inevitably increased. Therefore, for example, in the above-described chemical liquid injection work, in a state in which the worker has risen to the ceiling of the chemical liquid tank, a chemical such as an agrochemical is pre-loaded on the ceiling of the chemical liquid tank, and the liquid is supplied to the chemical liquid tank via the injection port. An operation mode in which the medicine is introduced from the injection port while supplying water occurs.

  However, in the above-mentioned conventional boom sprayer, only the floor for performing the above-mentioned operation is disposed around the chemical solution tank, particularly, at a lower portion around the chemical solution tank, and the large capacity ( It is not possible to cope with the work form for the (large) chemical liquid tank.

  Also, for example, a ladder extending to the ceiling around the chemical solution tank (side surface and front and rear surfaces) may be attached, or the above-described ascent / descent step for ascending to the floor of the related art may be extended to the ceiling. Such measures cause a problem such as an increase in the weight of the boom sprayer and a problem such as poor workability and stability (safety) of work for moving up and down the ladder.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a chemical solution tank that enables an operator to easily ascend and descend to a ceiling portion of a chemical solution tank while suppressing an increase in weight. And a boom sprayer using the same.

  In order to solve the above-mentioned problem, the chemical liquid tank according to the present invention is a chemical liquid tank provided with an inlet for injecting a chemical liquid in a ceiling portion, and the step for ascending to the ceiling portion is performed by the chemical liquid tank. It is characterized by being integrally molded with a part of the.

  In a preferred mode, the step is provided at a corner formed in the chemical solution tank.

  In another preferred embodiment, the step is formed so as to continue from the front surface to the top surface of the chemical solution tank.

  In a further preferred form, the step is provided on at least one of a left end and a right end of a front wall of the chemical liquid tank.

  In another preferred embodiment, the steps are provided at a plurality of locations on the chemical solution tank.

  In a further preferred embodiment, the inlet is provided between the plurality of steps.

  In another preferred embodiment, a handrail is provided on a side of the step to assist in ascending and descending, and to prevent the step from falling or sliding down from the chemical solution tank.

  In another preferred embodiment, a handle that assists in ascending and descending is provided in a portion of the ceiling portion beside the step.

  In another preferred embodiment, the tread of the step is provided with a tread provided with a non-slip.

  In another preferred embodiment, the rising portion of the step is inclined so as to fall in a direction in which the step is formed.

  In addition, the boom sprayer according to the present invention is provided with the chemical solution tank, a boom unit provided behind the chemical solution tank, a part of which is folded and stored on the side of the chemical solution tank, and the boom sprayer for ascending to the step. It is characterized by comprising an intermediate floor provided in front of the chemical liquid tank, and an auxiliary step for ascending to the intermediate floor.

  In a preferred embodiment, the intermediate floor is provided above a traction unit provided in front of the chemical solution tank, and the auxiliary step is provided on at least one of a left side and a right side of the traction unit.

  In a further preferred embodiment, the traction unit is provided at the center in the left-right direction of the chemical liquid tank.

  In another preferred embodiment, the intermediate floor includes a first intermediate floor that can ascend from the auxiliary step, and at least a part of a front wall portion of the chemical solution tank to ascend from the first intermediate floor to the step. And a second intermediate floor provided along.

  According to the present invention, a step-like step for ascending to a ceiling provided with an injection port for injecting a drug solution is formed integrally with a part of the drug solution tank, so that a separate component such as a ladder is used. Since there is no need to attach, and the work of ascending and descending is easier than that of a ladder or the like, the worker can easily ascend and descend to the ceiling of the chemical liquid tank while suppressing an increase in weight. Further, in the case of a ladder, it is necessary for the worker to go up and down while grasping the ladder by hand, but according to the present invention, the worker can basically go up and down without using a hand, in other words, work Since the worker can safely move up and down while holding work tools and the like in his hand, the workability of the worker can be significantly improved.

  In addition, since the step integrally formed with the chemical liquid tank is formed so as to continue from the front surface to the top surface of the chemical liquid tank, the worker can go up and down from the front side, which is the traveling body side, to the ceiling. In addition, the workability when the operator performs the various operations described above can be further improved.

  Further, the step is provided on at least one of the left end and the right end of the front wall of the chemical solution tank, so that the worker can move up and down from the front side, which is the traveling body side, to the ceiling. Since the working space on the ceiling of the chemical solution tank, particularly the working space around the inlet provided on the ceiling, can be effectively secured, it is possible to effectively enhance the workability when the worker performs the above-described various works. Can be.

  In addition, since the steps are provided at a plurality of locations in the chemical solution tank, and furthermore, an injection port is provided between the plurality of steps, it is possible to cope with various field shapes and water place arrangements. However, it is also possible to enhance the convenience when performing various operations as described above.

  Also, a handrail is provided on the side of the step to assist in ascending and descending and preventing falling or slipping from the chemical solution tank, and a handle for assisting in ascending and descending is provided on a side portion of the ceiling in the step. Is provided, it is possible to further improve the safety when the worker goes up and down the steps.

  In addition, since the tread of the step is provided with a tread provided with a non-slip, even when the step is integrally formed with the chemical solution tank, safety when an operator moves up and down the step is ensured. Nature can be secured.

  In addition, since the rising portion of the step is inclined so as to fall in the direction in which the step is formed, when the worker climbs to the ceiling using the step, the foot is raised on the rising portion. It is less likely to be caught, and it is easier for the worker to check the tread of the lower step of the step when descending from the ceiling using the step, so that the work of climbing and descending becomes easier, and the worker can perform the step. There is an advantage that the safety at the time of ascending and descending can be further secured, and the step can be easily formed integrally with the chemical liquid tank.

The perspective view which looked at the embodiment of the boom sprayer concerning the present invention from the left front. The perspective view which looked at the boom sprayer shown in FIG. 1 from the right front. The front view of the boom sprayer shown in FIG. The rear view of the boom sprayer shown in FIG. The left view which looked at the boom sprayer shown in FIG. 1 from the left. The right view which looked at the boom sprayer shown in FIG. 1 from the right. The top view of the boom sprayer shown in FIG. The enlarged view of the A section of FIG. The enlarged view of the B section of FIG.

  Hereinafter, embodiments of a chemical solution tank and a boom sprayer using the same according to the present invention will be described with reference to the drawings.

  In the following, a traction boom sprayer mainly used in a large-sized boom sprayer will be described. However, it is needless to say that the present invention can be applied to a so-called self-propelled boom sprayer and a mounted boom sprayer. In addition, it goes without saying that the chemical liquid tank of the present invention can be applied to various chemical liquid sprayers that spray chemicals such as pesticides or chemical liquids on crops and the like, in addition to boom sprayers.

  Further, in the present specification, expressions indicating positions and directions such as “up and down”, “left and right”, and “front and back” are used in order to avoid complicating the description. Direction).

  1 and 2 are perspective views of a boom sprayer according to an embodiment of the present invention as viewed from the front left and front right. 3 to 7 are a front view, a rear view, a left side view, a right side view, and a plan view of the boom sprayer shown in FIG. 1, respectively. FIG. 8 is an enlarged view of a portion A in FIG. 1, and FIG. 9 is an enlarged view of a portion B in FIG. FIGS. 1 to 7 show a state in which the boom is stored, and a state in which the boom sprayer portion is detached from the traveling machine (tractor). 8 and 9, the boom stored on the side of the chemical tank is omitted so that the main part of the chemical tank can be visually recognized.

  The illustrated boom sprayer 1 sprays a chemical or a chemical solution such as a pesticide on a crop or the like in a field while pulling by a traveling machine (for example, a tractor). , And two wheels 6 on the left and right sides (four in total) are provided on the lower side. In the body frame 5, a chemical liquid tank 20 made of a synthetic resin is mounted on a rear portion (a portion where the wheels 6 are located), a traction unit 10 is mounted on a front portion thereof, and a boom unit 30 is mounted on a rear end thereof. ing. Further, the chemical solution in the chemical solution tank 20 is provided between the chemical solution tank 20 of the body frame 5 and the traction unit 10 (particularly, a space formed by recessing the lower end portion of the front wall portion 25 of the chemical solution tank 20). The pump 7 and the like for pressure-feeding to the boom unit 30 (a plurality of spray nozzles 33 arranged on the center boom 31 and the side boom 32) are provided.

  The boom unit 30 is mounted so as to be able to move up and down with respect to the body frame 5, and is mainly provided on a center boom 31 laid in a direction perpendicular to the front-rear direction and on both left and right sides of the center boom 31. And a pair of side booms 32, 32.

  As can be understood from FIG. 4, a pair of vertically extending rails 4, 4 are fixedly arranged side by side at the rear end of the body frame 5, and A boom mount 30a formed of a substantially rectangular frame in a long rear view is mounted so as to be able to move up and down, and the center boom 31 is mounted substantially parallel to the boom mount 30a (at a position rearward of the boom mount 30a). . The rails 4 provided side by side are connected and held by a plurality of connecting members 4a extending in the left-right direction at appropriate positions in the vertical direction. The boom mount 30a to which the center boom 31 is attached is vertically moved with respect to the machine body frame 5 by an elevating cylinder (not shown) fixed to the rails 4, 4 and a connecting member 4a for connecting the rails 4, 4. By being able to move up and down, the entire boom unit 30 can move up and down with respect to the body frame 5.

  The side booms 32, 32 are rotatably supported on the left and right ends of the boom base 30a via the opening / closing arms 30b, 30b with respect to the center boom 31, so that when the chemical solution is not sprayed (when not working) ) Is folded in a direction along the front-rear direction, and as shown, the front side is obliquely raised to a lateral position with respect to the body frame 5 and the chemical solution tank 20 (in other words, to fall backward). Is stored. In order to elastically support the long side booms 32, 32 in the folded storage state, the body frame 5 (the portion on the front side of the wheels 6) protrudes to the left and right sides of the chemical solution tank 20. A pair of support columns 3, 3 extending in the up-down direction is fixed at the position, and boom receivers 3a, 3a are provided at predetermined positions of the support columns 3, 3. On the other hand, when the chemical solution is sprayed (at the time of work), the side booms 32, 32 are pivoted around the left and right ends of the boom mount 30a and near the left and right ends of the center boom 31, respectively. At a position extending substantially in a straight line with respect to the center boom 31.

  Further, in the illustrated example, the side booms 32 have a telescopic function such that the entire length thereof can be changed stepwise in the longitudinal direction. At the time of work, after being pivoted with respect to the center boom 31 and deployed laterally, it is extended to a length corresponding to the target range where the chemical solution is to be sprayed (slide such a boom. Also called a formula boom).

  A plurality of spray nozzles 33 are provided on the center boom 31 and the side booms 32 at predetermined intervals along the longitudinal direction of each boom. In each of the drawings, the spray nozzles provided on the center boom 31 are omitted.

  Note that the side booms 32 need not have the above-described expansion and contraction function. Further, the center boom 31 may have a tilting function such that the tilt angle with respect to the horizontal direction can be changed around the both ends. Further, the boom unit 30 controls the entire boom unit 30 so that the (side booms 32, 32) of the boom unit 30 does not come into contact with farmland or crops when the traveling body is inclined with respect to the horizontal direction during traveling or the like. More specifically, a tilt angle adjusting mechanism for maintaining the level of the center boom 31) may be provided.

  The chemical liquid tank 20 stores a chemical liquid to be supplied to the spray nozzles 33 provided on the center boom 31 and the side booms 32 of the boom unit 30 (the spray nozzles provided on the center boom 31 are not shown). Are arranged in front of the boom unit 30 and between the side booms 32, which are folded during storage. The chemical liquid tank 20 has a substantially rectangular shape that is slightly longer in the front-rear direction when viewed in a plan view, and is mainly provided with a bottom 21 mounted on the body frame 5 so as to face the bottom 21 and allow an operator to board. It is composed of a ceiling portion 22 having an upper surface (top surface) formed substantially flat, and a left wall portion 23, a right wall portion 24, a front wall portion 25, and a rear wall portion 26 connecting the bottom portion 21 and the ceiling portion 22. ing.

  The rear part of the left and right lower corners (in other words, the lower end parts of the left wall part 23 and the right wall part 24) formed by the bottom part 21 and the left wall part 23 and the right wall part 24 is inside. The recess is formed as a tire house that accommodates a part (upper part) of the wheel 6.

  Also, the front and lower corners formed by the bottom 21 and the front wall 25 (in other words, the lower end portion of the front wall 25) are also formed to be depressed inward, and the depressions The pump 7 and the like are accommodated in the formed space.

  On the other hand, the center of the front end and the rear end of the ceiling portion 22 in the left-right direction (a substantially square portion in plan view) is slightly protruded upward, and the protruding portions are formed by the liquid injection portions 27, 27. Have been. Each injection part 27 has a substantially circular injection port 27a at the center thereof in plan view, and a lid 27b for closing the injection port 27a is attached to be openable and closable.

  Also, the left and right sides of the liquid injection section 27 formed at the center in the left-right direction of the front end of the ceiling section 22, that is, the left and right side ends of the front end of the ceiling section 22 (in other words, the front wall section 25 of the chemical solution tank 20). Are formed stepwise, so that steps 28 and 29 from the front surface to the top surface of the chemical solution tank 20 are integrally formed with the chemical solution tank 20. In the present embodiment, each of the left and right steps 28 and 29 includes a tread surface 28a, 29a formed of a substantially horizontal surface that is one step lower from the upper surface (top surface) of the ceiling portion 22, and a tread surface 28a formed of the upper surface (top surface) of the ceiling portion 22. , 29a.

  Since the front wall portion 25 of the chemical solution tank 20 is slightly curved so as to protrude forward, each tread surface 28a, 29a of each step 28, 29 has a substantially parallelogram shape in plan view. (See FIG. 7). In addition, since the upper half portion of the front wall portion 25 (the portion where the steps 28 and 29 are formed) is slightly inclined so as to fall backward, the kick-up portions 28c and 29c of the steps 28 and 29 also move backward. It is slightly inclined so that it falls down (see FIGS. 5, 6, and 9).

  Each tread surface 28a, 29a of each step 28, 29 has its inner portion slightly higher than the outer edge portion, and the raised portion (mounting surface) suppresses the tread surfaces 28a, 29a from slipping. To secure the rigidity of the treads 28a and 29a and to prevent damage to the treads 28a and 29a due to scratches or the like, metal treadboards 28b and 29b provided with convex portions as slip stoppers are fastened and fixed by bolts. ing. In addition, supporting columns 3 and 3 provided on the sides of the chemical solution tank 20 are used to assist the worker in lifting and lowering and to prevent the steps 28 and 29 (in other words, the chemical solution tank 20) from falling or slipping. Handrails 3b, 3b having a substantially inverted U-shape in side view are attached to positions corresponding to lateral sides on the left and right sides (open sides) of the respective steps 28, 29. Each handrail 3b is composed of an upper side portion, a lower side portion, and a vertical side portion connecting the upper side portion and the lower side portion, and the vertical side portion is connected to the support columns 3, 3 via a connecting member. . Note that the vertical side of each handrail 3b is inclined so as to slightly fall backward in accordance with the inclination angle of the upper half of the front wall 25 (see FIGS. 5 and 6). Furthermore, of the liquid injection part 27 on the front end side of the ceiling part 22 of the chemical liquid tank 20, the inner side in the left-right direction of each of the steps 28 and 29 (the side facing the side of the chemical liquid tank 20 and the side that is not open) A pair of left and right handles 28d, 29d for assisting a worker to move up and down is attached to a portion corresponding to the right side (i.e., left and right sides of the injection port 27a provided in the liquid injection section 27). (Particularly, see FIG. 8).

  Further, in the present embodiment, on the ceiling 22, in particular, above the portions other than the liquid injection sections 27, 27 provided at the front end and the rear end, the operator performs various operations on the ceiling 21. A workbench 2 is arranged. As is well understood by referring to, for example, FIG. 7, the work table 2 is mainly configured such that a metal wire is stretched in a mesh shape on a substantially rectangular metal frame in plan view. . The worktable 2 has a substantially central portion supported by the ceiling portion 22 of the chemical solution tank 20 by a central support member 2a provided on the lower surface, and has a pair of rear support members 2c at its rear left and right ends. 2c is connected to and supported by a connecting member 4a for connecting the rails 4, 4, and the front left and right ends thereof are supported by a pair of front supporting members 2b, 2b, and the supporting pillar 3 is provided on the side of the chemical solution tank 20. , 3 and supported.

  In this specification, ascending to the ceiling portion 22 using the above-described steps 28 and 29 means not only ascending to the upper surface (top surface) of the ceiling portion 22 but also as described above. It goes without saying that climbing to the work table 2 provided in the above is also included.

  The chemical solution tank 20 has a two-part structure including an upper half part and a lower half part, and the front part of the upper half part (that is, the upper half part of the front wall part 25) It is slightly curved so as to protrude forward (see FIG. 7), and is slightly inclined so as to fall backward (see FIGS. 5 and 6). Is provided. A space for accommodating the tire house and the pump 7 described above is provided in the lower half thereof.

  The towing unit 10 is for connecting and pulling the boom sprayer 1 to the traveling machine body, and is arranged in front of the chemical liquid tank 20 and substantially at the center in the left-right direction. The traction unit 10 mainly includes a joint shaft 11 connected to a connecting portion of the traveling body and a power transmission mechanism 12 for transmitting the power of (the engine of) the traveling body to the boom sprayer 1 side. .

  The joint shaft 11 is connected to the center of the front end of the body frame 5 so as to be swingable in the left-right direction. The power transmission mechanism 12 is disposed behind the joint shaft 11, and the pump 7 is driven by the power of (the engine of) the traveling body obtained through the power transmission mechanism 12, so that a chemical liquid tank is provided. The liquid medicine in 20 is pressure-fed to the spray nozzle 33 provided in the center boom 31 and the side boom 32 of the boom unit 30.

  A gate-shaped cover member 13 is attached to a front portion of the body frame 5 so as to cover the periphery (upper side and left and right sides) of the power transmission mechanism 12 in a front view. The substantially horizontal top plate 13a of the cover member 13 is a first intermediate floor 13a on which an operator can rest, and the left and right side plates 13b, 13b of the cover member 13 are slightly inclined in the left-right direction. Auxiliary steps 14, 14 for ascending and descending to the intermediate floor 13a are attached so as to be symmetric with respect to the left and right sides. The front end of the top plate 13a of the cover member 13 assists the worker in ascending and descending using the auxiliary steps 14 and 14 and prevents the worker from falling from the top plate (first intermediate floor) 13a. For this purpose, a handrail 15 made of a substantially rectangular frame in a front view is provided.

  Further, a pair of columnar members 16, 16 arranged in the left-right direction are fixed to the body frame 5 so as to be connected to the left and right ends of the rear end of the top plate 13 a of the cover member 13 and extend in the up-down direction. . The column members 16 extend slightly below the steps 28 and 29 provided in the chemical tank 20 (in the illustrated example, the boundary between the upper half and the lower half of the chemical tank 20). A second intermediate floor 17 is provided at the upper ends of the members 16, 16 and extends in the left-right direction along the front surface shape of the front wall 25 of the chemical solution tank 20. The second intermediate floor 17 has a slight width in the front-rear direction, specifically, a width that allows an operator to place a foot.

  In the illustrated example, the width of the first intermediate floor 13a in the left-right direction is set to be equal to the width of the inlet 27a of the ceiling part 22 of the chemical liquid tank 20, and the width of the second intermediate floor 17 in the left-right direction is , The width of each step 28, 29 is set to be approximately half the width of the treads 28a, 29a, but if the steps 28, 29 can be moved up and down through the first intermediate floor 13a and the second intermediate floor 17, respectively. The width in the left-right direction of the first intermediate floor 13a and the second intermediate floor 17 may be set as appropriate.

  Further, the first intermediate floor 13a and the second intermediate floor 17 are provided with a convex portion as a non-slip.

  In the boom sprayer 1 configured as described above, a chemical liquid injection operation for inputting (injecting) a chemical such as a pesticide through an injection port 27a provided in the ceiling portion 22 of the chemical liquid tank 20, or a strainer (unfitted) from the injection port 27a. In general, the side booms 32, 32 of the boom unit 30 are folded to the side of the body frame 5 and the chemical solution tank 20 (retracted state) for the attachment / detachment work for attaching and detaching the illustrated) and the cleaning operation for cleaning the inside of the chemical solution tank 20. However, the worker rises from the front side (running body side) of the chemical solution tank 20 to the ceiling part 22 (the top surface) thereof so as not to interfere with the folded side booms 32, 32, and on the ceiling part 22. The various operations described above can be performed.

  Specifically, when performing the above-described various operations, the operator grasps the handrail 15, for example, through the auxiliary step 14 provided on the side of the power transmission mechanism 12 of the traction unit 10, It rises on the top plate (first intermediate floor) 13 a of the cover member 13 above the power transmission mechanism 12. Next, while grasping the handrail 3b and the handles 28d and 29d provided on the sides of the steps 28 and 29, the foot is placed on the second intermediate floor 17 from the top plate (first intermediate floor) 13a of the cover member 13. At the same time, it rises to the lower part of the steps 28 and 29 (the treads 28a and 29a which are one step lower than the top surface of the ceiling part 22) provided on the left and right ends of the front wall part 25 of the chemical liquid tank 20. Then, from there, the user can ascend to the upper stage of the steps 28 and 29, that is, the ceiling 22, while using the handrail 3b, for example.

  When the various operations described above are completed on the ceiling 22, the user can descend from the ceiling 22 to the ground without interfering with the folded side booms 32, 32 in a procedure reverse to the above procedure.

  As described above, according to the boom sprayer 1 of the present embodiment, the step-like steps 28 and 29 for ascending (listening) on the ceiling portion 22 provided with the injection port 27 a for injecting the chemical solution are included in the chemical solution tank 20. Since it is integrally molded in one part, there is no need to attach a separate part such as a ladder, and the work of lifting and lowering is easier than that of a ladder, etc. Can easily be moved up and down to the ceiling 22 of the chemical solution tank 20. In the case of a ladder, it is necessary for the worker to go up and down while grasping the ladder with his / her hand, but according to the boom sprayer 1 of the present embodiment, the worker has working tools and the like in his hand. Since it can be safely moved up and down even in the state, the workability of the worker can be remarkably improved.

  In addition, since the steps 28 and 29 formed integrally with the chemical solution tank 20 are formed so as to continue from the front surface to the top surface of the chemical solution tank 20, the worker can move from the front side, which is the traveling body side, to the ceiling 22. Since it is possible to move up and down, it is possible to further enhance the workability when the operator performs the various operations described above.

  Further, the steps 28 and 29 are performed at the left end and the right end of the front wall 25 of the chemical solution tank 20 (the corner formed by the front wall 25 and the left wall 23, and the front wall 25 and the right wall). (A corner formed with the portion 24), the worker can go up and down from the front side, which is the traveling machine body side, to the ceiling 22 and work on the ceiling 22 of the chemical liquid tank 20. Since a space, in particular, a work space around the inlet 27a provided in the ceiling portion 22 can be effectively secured, workability when the operator performs the above-described various works can be effectively improved.

  In addition, the steps 28 and 29 are provided at a plurality of locations of the chemical solution tank 20, and the inlet 27 a is provided between the plurality of steps 28 and 29, so that various field shapes and water can be obtained. It is possible to cope with the place arrangement, and it is also possible to enhance the convenience when the worker performs various kinds of work as described above.

  Further, handrails 3b, 3b are provided on the sides of the steps 28, 29 to assist in ascending and descending and to prevent falling or sliding down from the chemical solution tank 20. By providing the handles 28d and 29d for assisting the lifting and lowering at the side portions, it is possible to further improve the safety of the worker when lifting and lowering the steps 28 and 29.

  Also, the steps 28, 29 are integrally formed with the chemical solution tank 20 by providing the treads 28b, 29b provided with anti-slip on the tread surfaces 28a, 29a of the steps 28, 29. In addition, it is possible to ensure the safety when the worker moves up and down the steps 28 and 29.

  Further, since the kick-up portions 28c and 29c of the steps 28 and 29 are inclined so as to fall toward the direction in which the steps 28 and 29 are formed (rearward), an operator can perform the steps 28 and 29. When climbing to the ceiling portion 22 by utilizing the feet, the feet are less likely to be caught on the rising portions 28c, 29c, and when the worker descends from the ceiling portion 22 by using the steps 28, 29, Since it is easy to check the treads 28a and 29a at the lower stage of 29, the work of ascending and descending becomes easy, and the safety when an operator goes up and down the steps 28 and 29 can be further secured. There is also an advantage that it can be easily formed integrally with the chemical liquid tank 20.

  In the above-described embodiment, the steps 28 and 29 integrally formed with the chemical solution tank 20 are provided on the left end and the right end of the front wall 25 of the chemical solution tank 20. If it can be lifted, the step may be formed at another position of the chemical solution tank 20 (for example, front and rear, left and right, front and left and / or right). Further, in the above-described embodiment, the steps 28 and 29 are provided at a plurality of positions of the chemical liquid tank 20, but the number of the steps can be appropriately selected. In the above-described embodiment, the tread surfaces 28a and 29b of the steps 28 and 29 are provided with the metal tread plates 28b and 29b provided with the protrusions as slip stoppers. , 29a may be integrally formed with a convex portion as a non-slip. Needless to say, the number of steps in steps 28 and 29, the shape of the tread, the dimensions of the tread and the rise, the gradient, and the like can be appropriately changed according to the size of the chemical tank 20 and the demands of the operator.

  In the above-described embodiment, the worker goes up to the ceiling 22 via the first intermediate floor 13a, the second intermediate floor 17, and the steps 28 and 29 in consideration of the size of the chemical solution tank 20 and the like. For example, the first intermediate floor 13a and the second intermediate floor 17 may be omitted as long as a step for ascending from the ground to the ceiling 22 can be formed in the chemical solution tank 20, or the first intermediate floor may be omitted. The first intermediate floor 13a and the second intermediate floor 17 may be formed integrally (as one member) by designing the same height of the first intermediate floor 13a and the second intermediate floor 17.

DESCRIPTION OF SYMBOLS 1 Boom sprayer 2 Work table 2a Central support member 2b Front support member 2c Rear support member 3 Support pillar 3a Boom receiver 3b Handrail 4 Rail 4a Connecting member 5 Body frame 6 Wheels 7 Pump 10 Traction unit 11 Joint shaft 12 Power transmission mechanism 13 Cover member 13a Top plate of cover member (first intermediate floor)
13b Side plate 14 of cover member Auxiliary step 15 Handrail 16 Columnar member 17 Second intermediate floor 20 Chemical tank 21 Bottom 22 Ceiling 23 Left side wall 24 Right side wall 25 Front wall 26 Rear wall 27 Liquid injection part 27a Note Entrance 27b Lid 28, 29 Step 28a, 29a Tread surface 28b, 29b Tread plate 28c, 29c Rising part 28d, 29d Handle 30 Boom unit 30a Boom gantry 30b Open / close arm 31 Center boom 32 Side boom 33 Spray nozzle

Claims (11)

An injection port for injecting a chemical solution is a chemical solution tank provided on a ceiling portion,
The step for ascending to the ceiling is integrally formed with the chemical liquid tank so as to continue from the front surface to the top surface of the chemical liquid tank,
The steps are provided stepwise in at least one of the left end and right end of the front wall of the liquid tank, riser portion of the step, so that to position rearward toward the lateral direction inside outward in the left-right direction A chemical liquid tank characterized by being inclined to the bottom.   The chemical solution tank according to claim 1, wherein the steps are provided at a plurality of locations of the chemical solution tank.   The chemical solution tank according to claim 2, wherein the inlet is provided between the plurality of steps.   The chemical solution tank according to any one of claims 1 to 3, wherein a handrail is provided on a side of the step to assist in ascending and descending, and to prevent falling or sliding down from the chemical solution tank. .   The chemical solution tank according to any one of claims 1 to 4, wherein a handle for assisting elevating and lowering is provided on a side portion of the ceiling portion on a side of the step.   The chemical solution tank according to any one of claims 1 to 5, wherein a tread provided with a non-slip is provided on the tread surface of the step. Riser portion of the step is characterized in that inclined so that to position the rear I follow the direction from the lower side to the upper side, the chemical liquid tank according to any one of claims 1 to 6. A drug solution tank according to any one of claims 1 to 7,
A boom unit that is provided behind the chemical solution tank and a part of which is folded and stored on the side of the chemical solution tank;
An intermediate floor provided in front of the chemical solution tank to ascend to the step,
An auxiliary step for climbing to the intermediate floor.   The intermediate floor is provided above a traction unit provided in front of the chemical solution tank, and the auxiliary step is provided on at least one of a left side and a right side of the traction unit, A boom sprayer according to claim 8.   The boom sprayer according to claim 9, wherein the traction unit is provided at a center of the chemical liquid tank in the left-right direction.   The intermediate floor is provided along at least a part of a first intermediate floor that can ascend from the auxiliary step and a front wall portion of the chemical solution tank to ascend from the first intermediate floor to the step. The boom sprayer according to any one of claims 8 to 10, further comprising: a second intermediate floor.

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