JP5696340B2 - Sheet shutter drive device - Google Patents

Description

  The present invention relates to a drive device that rotationally drives a drum of a sheet shutter.

  FIG. 1 shows an example of a sheet shutter. The sheet shutter 100 is often provided at an entrance / exit G of a factory, warehouse, or the like for insectproofing, dustproofing, or blocking air inside and outside. Various types of sheet shutters 100 are recognized, but in recent years, in particular, small and low-priced ones have been demanded.

  The sheet shutter 100 includes a sheet 101 made of cloth or synthetic resin, a shutter case 102, a sheet guide 103, and the like. The shutter case 102 is disposed in the horizontal direction along the upper edge of the entrance / exit G, and the sheet 101 is taken in and out from the sheet outlet on the lower surface of the shutter case 102. The pair of sheet guides 103 are arranged in the vertical direction along the left and right side edges of the doorway G, and guide the loading and unloading of the sheet 101. Inside the shutter case 102 are provided a long cylindrical drum 104 around which the sheet 101 is wound, a driving device for rotating the drum 104, and the like.

  One of such drive devices is a built-in drive device arranged inside a drum (for example, Patent Document 1).

  A reduction gear having a flange-shaped output shaft is known (for example, Patent Document 2). In Patent Document 2, a carrier that also serves as an output shaft of a reduction gear is composed of a disc-shaped main body plate provided with three columns and a cover plate fixed to each column. A planetary gear is rotatably supported between the main body plate and the cover plate.

  Eight mounting holes are formed on the output side surface of the main body plate, and three planetary pin holes into which one end of a pin supporting the planetary gear is inserted are formed on the rear surface. Since both the mounting holes and the planetary pin holes are equally arranged in the circumferential direction, the formation positions of any one of the holes are made to coincide with each other so that the holes do not interfere with each other. I try to shift.

JP-A-2005-240416 JP 2002-181139 A

  FIG. 2 shows an example of a conventional built-in driving device 110 (also simply referred to as the driving device 110) used in the sheet shutter 100. As shown in the figure, most of the distal end side of the driving device 110 is inserted into the inside from one end of the drum 104 that is disposed horizontally, and the base end portion that protrudes from the drum 104 is fixed to the shutter case 102. (Fixed part of the driving device 110). The drive device 110 includes a brake unit 111, a motor unit 112, and a speed reduction unit 113, which are arranged in series along the rotation axis inside the drive device 110. The output shaft 114 protrudes from the tip of the driving device 110 toward the back of the drum 104.

  A shaft fixing member 115 is fixed inside the drum 104. The shaft fixing member 115 has a disk-shaped base portion 115a and a boss portion 115b provided at the center of the base portion 115a. An output shaft 114 is fixed to a hole penetrating through the center of the base portion 115a and the boss portion 115b, and the drum 104 is rotatably connected to the driving device 110 via a shaft fixing member 115. Note that the other end of the drum 104 is rotatably supported by the shutter case 102 via a shaft support portion 116.

  As described above, in the case of the conventional built-in type driving device 110, the driving device 110 itself is configured to be horizontally long, and the shaft fixing member 115 is attached to the output shaft 114 protruding from the driving device 110 to the back of the drum 104. For this reason, the attachment portion (connection portion) of the shaft fixing member 115 is far away from the fixation portion of the drive device 110. Since the load of the drum 104 or the like is applied to the connection part, a large moment of force acts on the fixed part that is separated. As a result, there is a disadvantage in that strength is required for the fixing portion, and it is difficult to ensure durability in reducing the size and price.

  In addition, since it is desired to make the diameter of the drum 104 as small as possible, a sufficient gap cannot be secured between the end portion of the drum 104 and the driving device 110. For this reason, when the drum 104 is bent, the end portion of the drum 104 and the driving device 110 may come into contact with each other. Furthermore, since it is necessary to reduce the weight of the shaft fixing member 115 while ensuring the strength, the shaft fixing member 115 is likely to have a complicated structure such as formation of the boss portion 115b, and the productivity is difficult.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sheet shutter driving device that is excellent in productivity, can support a drum more appropriately, and is advantageous for downsizing and cost reduction.

  The sheet shutter driving device according to the present invention accommodates a sheet, a cylindrical drum around which the sheet is wound, a support member fixed to the inner wall of the drum, and the drum, and the sheet can be taken in and out. And a shutter driving device including a shutter case. The drive device includes a main body portion that is inserted into one end of the drum from the front end side, and a base portion that is provided integrally with the main body portion and is attached to the shutter case.

  The main body portion accommodates a motor portion, a brake portion that controls braking of the rotation of the motor portion, and a speed reduction portion that is disposed at a tip portion of the main body portion and decelerates and outputs the rotation of the motor portion. ing. The speed reduction part has a connection part exposed from the body part, and the connection part is connected to the support member without a shaft.

  According to the drive device having such a configuration, since the connecting portion is directly connected to the support member without interposing the shaft, the drive device is compared with the conventional drive device that supports the drum or the like via the shaft. It is possible to reduce the distance from the base portion on which is supported to the support site such as a drum. As a result, since the torque acting on the base portion is reduced, the strength required for the base portion and the portion for fixing the base portion can be reduced, and downsizing and cost reduction can be promoted. Since a boss portion or the like is not required and the structure of the support member can be simplified, the productivity is excellent.

  Specifically, it can be configured as follows. That is, the motor part has a drive shaft provided with a sun gear. The speed reduction part is arranged in a plurality of planetary gears meshed with the sun gear, non-rotatably arranged on the outer periphery of the planetary gears, and is capable of rotating the planetary gears via pins and meshed with the planetary gears. And a carrier that revolves around the sun gear. The carrier has a connecting surface that is exposed to the tip side of the main body. And the said deceleration part is connected with the said support member by sticking and fixing the said connection surface to the said support member.

  Since the support member is brought into close contact with and fixed to the connecting surface of the speed reduction portion exposed from the distal end side of the main body, the support member can be supported more stably than when supported by the shaft. As a result, the drum is restrained from bending, so that the drive device and the drum are difficult to contact, and the drum can be made smaller in diameter.

  More specifically, the following is preferable. That is, the connection surface is provided with a plurality of fastening holes for fastening the support member. The carrier is provided with a plurality of shaft holes into which the pins are inserted. And the said shaft hole penetrates and it is made to continue coaxially with either of the said fastening holes.

  If it does so, since a shaft hole and a fastening hole can be processed collectively, the man-hour and work load which are required for a process can be reduced, and productivity can be improved.

  In particular, when the main body has a columnar appearance, it is preferable to provide a small diameter portion having a relatively small outer diameter at the tip of the main body. And it is good for the said supporting member to have a flange part fixed to the said drum, and to make the said flange part oppose the said small diameter part.

  If it does so, space can be formed between the front-end | tip part of a main-body part, and a drum by providing a small diameter part. And if the support member is provided with a flange portion and the flange portion is arranged in the space so as to face the small diameter portion, the support member can be firmly fixed by the drum, and the support portion such as the drum approaches the base portion. The burden on the periphery of the base can be further reduced.

  The drive device may support the drum using an internal gear. For example, in such a drive device, the motor unit has a drive shaft provided with a sun gear. The speed reduction part is arranged rotatably on a plurality of planetary gears meshed with the sun gear, on an outer periphery of the plurality of planetary gears, and arranged on a non-rotatable manner with internal gears meshed with the planetary gears, via pins And a carrier that rotatably supports the planetary gear. The internal gear is exposed from the main body and is provided integrally with the support member.

  By supporting the drum using the internal gear, the support portion such as the drum is closer to the base portion, so that the burden on the periphery of the base portion can be further reduced. There is also an advantage that the structure can be relatively simplified.

  As described above, according to the present invention, compared to the conventional drive device, it is excellent in productivity and can support the drum more appropriately, so it is easy to realize downsizing and cost reduction of the seat shutter. become.

It is the schematic which shows an example of a sheet shutter. It is the schematic which shows the conventional drive device. It is a schematic sectional drawing which shows the drive device of embodiment. It is an enlarged view of the principal part in FIG. It is a schematic sectional drawing of a carrier. It is the schematic seen from the arrow X direction in FIG. It is a schematic sectional drawing in the YY line in FIG. It is the schematic corresponding to FIG. 4 which shows the drive device of another embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

  FIG. 3 shows an example of the driving device 1 (built-in type) for the sheet shutter 100A to which the present invention is applied. The sheet shutter 100A of the present embodiment is the same as that of FIG. 1 or FIG. 2 except that the flange wall 2 (support member) is provided inside the drum 104 instead of the driving device 1 and the shaft fixing member 115. The basic configuration is the same as that of the sheet shutter 100 described with reference to FIG.

  That is, as shown in FIG. 1, the sheet shutter 100A includes a sheet 101, a shutter case 102, a sheet guide 103, and the like, and the total length of the shutter case 102 is, for example, 1 m to 4 m. A long cylindrical drum 104 around which the sheet 101 is wound, a driving device 1 that rotates the drum 104, and the like are provided. As shown in FIG. 2, the driving device 1 is disposed at one end of the drum 104, and the shaft support 116 is disposed at the other end of the drum 104, and the drum 104 includes the driving device 1 and the drum 104. The shaft support 116 is rotatably supported.

  The flange wall 2 is a disk-shaped member. The peripheral edge of the flange wall 2 is fixed to the inner wall of the drum 104 and is arranged so as to be orthogonal to the center line A of the drum 104. Details of the flange wall 2 will be described later.

  The drive device 1 according to the present embodiment includes a main body 1a that is inserted into one end of a drum 104 from the front end side, and a base 1b that is integrally provided on the base end side of the main body 1a. The base 1b is fastened and fixed to the shutter case 102 with a bolt or the like. The main body 1a has a columnar (for example, cylindrical) appearance, and is assembled so that the drum 104 and the center line A (rotating axis A) coincide. The maximum outer diameter of the main body 1 a is set smaller than the minimum inner diameter of the drum 104 so that the main body 1 a and the drum 104 do not come into contact with each other.

  The case 3 constituting the outline of the main body 1a and the base 1b is formed by combining a plurality of parts. The motor unit 10, the brake unit 20, and the speed reduction unit 30 are arranged along the rotation axis A in the main body 1 a. In the driving device 1, a rotational driving force is formed by the motor unit 10, and the rotational driving force is output in a state of being decelerated by the reduction unit 30 in order to increase the torque.

  The motor unit 10 includes a drive shaft 11, a rotor 12, a stator 13, and the like, and is disposed at an intermediate portion in the direction of the rotation axis A in the main body unit 1 a. In addition to these, the motor unit 10 is provided with wiring for supplying current to the motor unit 10 from the outside, a substrate for controlling the current, and the like, but the description and illustration thereof are omitted here.

  The drive shaft 11 is supported by the case 3 via two bearings 14a and 14b so that the drive shaft 11 can freely rotate about the rotation axis A. The front end portion of the drive shaft 11 protrudes into the speed reduction portion 30, and the rear end portion of the drive shaft 11 protrudes into the brake portion 20. And the sun gear 15 is being fixed to the front-end | tip part of the drive shaft 11 coaxially (state in which the centerline corresponded).

  The rotor 12 is provided coaxially with the drive shaft 11, and a plurality of neodymium magnets 16 are provided on the outer periphery thereof. The stator 13 is a cylindrical composite member composed of a stator core 17, a plurality of coils 18, and the like, and is fixed to the inner wall of the case 3. The stator 13 is disposed on the outer side in the radial direction of the rotor 12 so as to face the outer peripheral surface of the rotor 12 with a slight gap.

  The brake unit 20 brakes and controls the rotational driving force output by the motor unit 10 in order to hold the sheet 101 at an arbitrary position and prevent the sheet 101 from slipping down. The brake part 20 is disposed at the base end side portion of the main body part 1a. The brake unit 20 is provided with a braking mechanism constituted by, for example, a disc brake or the like.

  As shown in detail in FIG. 4, the speed reduction portion 30 is disposed at a tip side portion of the main body portion 1 a. The speed reduction unit 30 includes three planetary gears 31, 31, 31, one internal gear 32, a carrier 33, and the like.

  The planetary gears 31 are arranged at equal intervals around the sun gear 15 so as to mesh with the sun gear 15. The internal gear 32 is a ring-shaped gear, and is disposed on the outer periphery of the planetary gears 31 so as to mesh with the planetary gears 31. The internal gear 32 is formed integrally with the case 3 and cannot rotate. Each planetary gear 31 is supported by a carrier 33.

  As shown in FIGS. 5, 6, and 7, the carrier 33 is a multistage cylindrical rotating body formed by cutting or the like from one metal block. Specifically, the carrier 33 includes a cylindrical first bearing portion 33a and a second bearing portion 33b that are integrally formed, and a gear support portion that has a larger diameter than the first bearing portion 33a and the second bearing portion 33b. 33c. The gear support portion 33c is located between the first bearing portion 33a and the second bearing portion 33b.

  The protruding end portion of the first bearing portion 33a is a flat surface orthogonal to the rotation axis A (connection surface 34). A meshing space 35 for receiving the sun gear 15 is formed in the center of the protruding end portion of the second bearing portion 33b. Three gear windows 36 are opened on the side surface of the gear support portion 33c corresponding to each planetary gear 31. These gear windows 36 communicate with the meshing space 35 through lateral holes 37 extending radially from the meshing space 35. Each planetary gear 31 is accommodated in each lateral hole 37 such that a part of the teeth of the planetary gear 31 protrudes from both ends of the lateral hole 37.

  Six fastening holes 38,..., 38 for fastening the flange wall 2 are formed in the connecting surface 34. These fastening holes 38, ..., 38 are formed in the first bearing portion 33a along the direction of the rotation axis A, and are arranged at equal intervals in the circumferential direction. A positioning jig hole 39 is formed in the center of the connecting surface 34.

  Three shaft holes 40, 40, 40 are formed in a portion of the carrier 33 extending from a part of the first bearing portion 33a to the gear support portion 33c and the second bearing portion 33b. These shaft holes 40, 40, 40 are formed along the direction of the rotation axis A, and are arranged at equal intervals in the circumferential direction so as to penetrate each lateral hole 37. The shaft hole 40 of the present embodiment is formed so as to pass through and to be coaxial with the fastening hole 38 in order to facilitate processing.

  That is, the three fastening holes 38 are arranged so as to overlap with the respective shaft holes 40 in the circumferential direction, and a pilot hole serving as a base for these holes is formed so as to penetrate the carrier 33. After that, the fastening hole 38 is formed by threading the portion of the lower hole on the first bearing portion 33a side, and the shaft hole 40 is formed by secondary processing on the second bearing portion 33b and the gear support portion 33c side of the lower hole. Is formed.

  A pin 41 is inserted into each shaft hole 40, and each planetary gear 31 is supported by the carrier 33 via the pins 41 so as to be rotatable and supported around the sun gear 15 so as to be revolved.

  The carrier 33 is rotatably supported by the case 3 via a first bearing 42 and a second bearing 43 with the connecting surface 34 facing the front end side of the main body 1a. A larger bearing than the second bearing 43 is used for the first bearing 42 and is disposed on the first bearing portion 33a side. The second bearing 43 is disposed on the second bearing portion 33b side. The connection surface 34 is exposed from the front end side of the main body 1a, and the flange wall 2 is fastened to the connection surface 34.

  The flange wall 2 has a disk-shaped main surface portion 51, and through holes 52 are formed at six locations corresponding to the fastening holes 38 in the main surface portion 51. A jig insertion hole 53 is formed in the central portion of the main surface portion 51 so as to correspond to the jig hole 39. A predetermined jig is inserted into the jig insertion hole 53 and the jig hole 39 and centered. Then, by fastening the bolts to the respective insertion holes 52 and the fastening holes 38, the flange wall 2 is brought into close contact with the connecting surface 34 and fixed at a predetermined position.

  In this way, by directly fixing the flange wall 2 to the connecting surface 34, the flange 1 can be flanged from the base 1b of the driving device 1 fixed to the shutter case 102, as compared with the conventional driving device 110 connected via the shaft. Since the distance to the fastening part with the wall 2 is shortened, the moment of force acting on the base 1b is reduced. As a result, the strength required for the fixing structure of the base portion 1b is reduced, which is advantageous in promoting downsizing and cost reduction.

  In addition, the flange wall 2 disposed so as to be orthogonal to the center line of the drum 104 is received and supported by the surface, so that the bending of the drum 104 can be suppressed, and the end portion of the drum 104 and the driving device 1 can be suppressed. Even if the gap between them is small, it is difficult for the drum 104 and the driving device 1 to come into contact with each other. Accordingly, the diameter of the drum 104 can be further reduced. Since the flange wall 2 does not require a complicated structure such as a boss portion, the productivity is excellent.

  Furthermore, in the drive device 1 of the present embodiment, the burden on the periphery of the base 1b can be further reduced. Specifically, a space (accepting space) is formed between the drum 104 and the small-diameter portion 61 by providing a small-diameter portion 61 having a relatively smaller outer diameter than the other portions at the tip portion of the main body 1a. Has been. The flange wall 2 is provided with a thick flange portion 62 that protrudes from the outer peripheral edge of the main surface portion 51 toward the drive device 1 and is fixed to the drum 104. The flange portion 62 is received in the receiving space and faces the small diameter portion 61.

  In this way, by providing the flange wall 62 with the flange portion 62 projecting to the drive device 1 side, and fixing the flange portion 62 to the drum 104, the base 1b is located at a portion where the load such as the drum 104 acts on the drive device 1. Since it can be brought closer to the side, the moment of force acting on the base 1b can be further reduced.

  Further, in the driving device 1 of the present embodiment, a partition wall portion 63 is provided that projects from the tip end portion of the flange portion 62 toward the center of the drum 104 over the entire circumference. The distal end of the partition wall portion 63 is close to the small diameter portion 61. By providing such a partition wall 63, when the lubricant leaks from the main body 1 a, the lubricant oil is prevented from flowing out by the partition wall 63, so that the lubricant leaks out of the drum 104. Can be prevented. Conversely, it is possible to prevent dust and the like from entering the inside of the driving device 1 from the outside of the drum 104.

(Another embodiment)
FIG. 8 shows a driving apparatus 1A according to another embodiment. In the driving device 1A of the present embodiment, the load on the periphery of the base 1b can be further reduced by using the internal gear. Since the basic configuration of the drive device 1A of the present embodiment is the same as that of the drive device 1 described above, the same reference numerals are used for members having the same functions, and the description thereof is omitted.

  The internal gear 32A of the drive device 1A is exposed from the main body 1a and is fixed to the drum 104 via a support ring 71 (support member). The support ring 71 and the internal gear 32A are integrally formed. The carrier 33 </ b> A of the present embodiment is fixed so as not to rotate by inserting a pin 41 into the main body 1 a (case 3). Therefore, each planetary gear 31 does not revolve even if it rotates.

  A pair of bearings 72, 72 are provided on the outer peripheral side of the carrier 33A. The internal gear 32 </ b> A is supported by the carrier 33 </ b> A via these bearings 72, 72 and is rotatable about the rotation axis A. Therefore, in the case of this driving device 1A, since it is connected to the drum 104 on the base 1b side further than the tip of the main body 1a, the moment of force acting on the base 1b can be further reduced.

  The drive device according to the present invention is not limited to the above-described embodiment, and includes various other configurations. For example, the cross-sectional shape of the drum or the main body may be circular or polygonal.

DESCRIPTION OF SYMBOLS 1 Drive device 1a Main part 1b Base 2 Flange wall (support member)
DESCRIPTION OF SYMBOLS 10 Motor part 15 Sun gear 20 Brake part 30 Deceleration part 31 Planetary gear 32 Internal gear 33 Carrier 34 Connection surface 38 Fastening hole 40 Shaft hole 61 Small diameter part 62 Flange part 100A Sheet shutter 101 Sheet 102 Shutter case 104 Drum 116 Shaft support part A Axis of rotation

Claims (3)

Sheet,
A cylindrical drum around which the sheet is wound;
A plate-like support member disposed so as to be orthogonal to the center line of the drum and having a peripheral edge supported by the inner wall of the drum ;
A shutter case that houses the drum and allows the sheet to be taken in and out;
A driving device for a sheet shutter comprising:
A main body inserted into one end of the drum from the tip side;
A base portion provided integrally with the main body portion and attached to the shutter case;
The main body includes a motor section, a brake section that controls braking of the rotation of the motor section, and a speed reduction section that is disposed at a tip portion of the main body section and decelerates and outputs the rotation of the motor section. And
The motor unit has a drive shaft provided with a sun gear,
The speed reduction part is arranged in a plurality of planetary gears meshed with the sun gear, non-rotatably arranged on the outer periphery of the planetary gears, and is capable of rotating the planetary gears via pins and meshed with the planetary gears. And a carrier that revolves around the sun gear, and
The carrier has a connecting surface exposed on the tip side of the main body,
A driving device in which the speed reducing portion is connected to the support member by fixing the connection surface to the support member . The drive device according to claim 1 ,
The coupling surface is provided with a plurality of fastening holes for fastening the support member,
The carrier is provided with a plurality of shaft holes into which the pins are inserted,
The drive device in which the shaft hole passes through and is coaxially connected to one of the fastening holes. The drive device according to claim 1 or 2 ,
The main body has a columnar appearance,
A small-diameter portion having a relatively small outer diameter is provided at the tip portion of the main body portion,
The support member has a flange portion fixed to the drum,
The drive device in which the flange portion faces the small diameter portion.

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