JP2011116256A - Caster for bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily replace a caster for a bag at low cost without reducing the strength of the caster. <P>SOLUTION: The caster for the bag includes a wheel 10, a wheel attachment plate 20, a bag-side board 30, and the like. The wheel 10 is attached to the wheel attachment plate 20 via an axle 13, a fork part 14, a turning shaft 17, and a bearing 15. The fork part 14 rotatably holds the wheel 10. The wheel attachment plate 20 turnably holds the fork part 14. The bag-side board 30 is fixed to a bag body using four screws 23. A circular central recess 31 which detachably accommodates the wheel attachment plate 20 to support the load is provided in the center of the bag-side board 30. Four screws 22 are provided every 90 degrees on the wheel attachment plate 20. Four female screws 32 are provided every 90 degrees on the central recess 31. The wheel attachment plate 20 is fixed to the bag-side board 30 with the four screws 23 while the wheel attachment plate 20 is fitted to the central recess 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heel caster, and more particularly to a heel caster that can be easily attached to and replaced by a heel body.

  Conventionally, when the caster is attached to the heel, the caster mounting plate is fastened to the heel with a screw or heel from the inside of the heel. However, since this method requires time and effort for installation and replacement, a method of attaching the caster to the guide frame of the attachment plate or a method of attaching the caster attachment shaft into the hole of the attachment plate has come to be adopted. The following are some examples of the related art.

  The “caster caster mounting structure” disclosed in Patent Document 1 allows a caster mounted on a cart to be easily replaced. As shown to Fig.9 (a), a metal caster mounting plate is fixed to the base frame of a trolley | bogie. A guide member for inserting the base plate of the caster is welded to the lower surface of the mounting plate. A positioning stop plate is provided so that the base plate inserted into the guide member stops at an appropriate position. Provide a stopper to prevent the base plate inserted at the proper position from coming off. The stopper stopper is formed by plastically deforming a part of the mounting plate so as to be elastically restored to the stopper release position.

  The “cart” disclosed in Patent Document 2 is such that an old caster is easily removed and replaced with a new one so that it can be used repeatedly. As shown in FIG. 9B, a plurality of casters are provided below the main body on which the load is placed. The caster is welded to a plate-shaped caster mounting member. A plate-like base member is welded to the lower surface of the main body. The caster mounting member is locked to the base member by the engaging member (slit and rivet).

  The “double wheel caster” disclosed in Patent Document 3 is configured such that the worn parts can be replaced and reused. As shown in FIG. 9C, the main shaft in the metal support bracket is detachably fixed to a support object such as a chair and serves as a center of rotation. A pair of wheels in the caster body is rotatably attached to the main shaft of the support bracket and rotates. The caster body can be separated from the support bracket, and the metal parts can be separated from the rubber and resin parts.

  The “caster” disclosed in Patent Document 4 can easily replace the main body and wheels. As shown in FIG.9 (d), the wheel support part which supports a wheel, and an attachment member are provided in the caster main body which supports a cabinet etc. The mounting member is detachably fixed to the front surface portion of the wheel support portion with screws, and can be separated in the front-rear direction with respect to the wheel support portion. A fitting groove extending from the upper end to the lower end is formed in the front surface portion of the wheel support portion. Fitting grooves are formed in the upper plate portion and the lower plate portion of the attachment member. A fitting hole is formed by the fitting groove, and the fitting shaft portion of the support shaft is inserted into the fitting hole. Thus, the main body is attached to the support shaft.

  The “suitcase caster” disclosed in Patent Document 5 is low in cost and easy to replace and repair the caster head portion. As shown in FIG.8 (e), a caster part assembly is comprised with a wheel assembly, a wheel shaft, and a caster head. The caster base, caster shaft and base plate constitute a base assembly. A caster shaft is fitted into the center hole of the caster head to form a caster. Attach the caster to the suitcase with screws through the screw holes on the caster base and base plate. The caster head is held by a recess at the tip of the caster shaft.

  The “caster” disclosed in Patent Document 6 is such that the caster holder is disassembled so that the worn rotation support can be replaced. As shown in FIG. 9 (f), a caster body having wheels for a handcart or the like is rotatably supported by a caster holder. Between the caster body and the caster holder, there is a rotation support for allowing the caster body to rotate. Of the caster body and the caster holder, the part that contacts the rotating support or the rotating support is formed of a synthetic resin. The caster holder can be disassembled into a plurality of parts, and the rotating support can be attached and detached.

Japanese Patent Laid-Open No. 10-193909 Japanese Patent Laid-Open No. 11-059432 JP-A-11-227406 JP 2001-334805 Japanese Patent Laid-Open No. 2003-146003 Japanese Patent Laid-Open No. 2003-200703

  However, conventional casters have the following problems. A caster used for a chair or a carriage has a different load application method from a caster for a bag, so that the method for replacing a caster such as a chair cannot be applied to the bag as it is. The method of inserting a caster into the bag cannot withstand overuse because it easily comes off. In the method of disassembling and replacing casters, the number of caster parts increases and the cost increases. When the caster is screwed into the heel, the screw jumps out of the heel when it is attached to the heel.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems so that it can be easily replaced at a low cost without reducing the strength of the anchor caster.

  In order to solve the above problems, in the present invention, a wheel composed of a tire and a hub, a fork portion that rotatably holds the wheel on an axle, a wheel mounting plate that rotatably holds the fork portion with a bearing, On the heel caster that includes the heel side substrate that holds the wheel mounting plate and is fixed to the heel body, a circular central recess is provided in the center of the heel side substrate for detachably storing the wheel mounting plate and supporting the load. And a screw for fixing the wheel mounting plate to the heel side substrate in a state where the wheel mounting plate is fitted in the central recess.

  Four screw holes are provided in the wheel mounting plate every 90 degrees, four female screws are provided in the central recess every 90 degrees, and the four screws are fixed to the base board with the wheel mounting plate fitted in the central recess. Equipped with. Or, three ridges are provided on the outer periphery of the wheel mounting plate every 120 degrees, three grooves are provided on the inner periphery of the central recess every 120 degrees, and the wheel mounting plate is mounted on the heel side substrate with the ridges fitted in the grooves. One screw to be fixed to. Alternatively, a large-diameter male screw is provided in the center of the wheel mounting plate, a large-diameter female screw is provided in the central recess, and the single wheel-fixing plate is fixed to the side board with the large-diameter male screw screwed into the large-diameter female screw. With screws.

  By configuring as described above, it can be easily replaced at a low cost without reducing the strength of the anchor caster.

It is a conceptual diagram of the anchor caster in Example 1 of this invention. It is a disassembled perspective view of the bag caster in Example 1 of this invention. It is a conceptual diagram of the modification of the bag caster in Example 1 of this invention. It is explanatory drawing of the attachment procedure of the anchor caster in Example 1 of this invention. It is a conceptual diagram of the bag caster in Example 2 of this invention. It is explanatory drawing of the attachment procedure of the bag caster in Example 2 of this invention. It is a conceptual diagram of the bag caster in Example 3 of this invention. It is explanatory drawing of the attachment procedure of the anchor caster in Example 3 of this invention. It is a conceptual diagram of the conventional caster.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.

  In the first embodiment of the present invention, the wheel is rotatably held by the fork portion, the fork portion is rotatably held by the wheel mounting plate, and the wheel mounting plate is fitted in the central recess of the heel side substrate fixed to the heel body. A wheel caster for removably fixing the wheel mounting plate to the bag side substrate with four screws.

  FIG. 1 shows a conceptual diagram of a bag caster. Fig.1 (a) is a side view of the bag caster. FIG. 1B is a front view of the bag caster. FIG.1 (c) is the perspective view which looked at the anchor caster from diagonally upward. FIG.1 (d) is the perspective view which looked at the anchor caster from diagonally downward. FIG. 2 shows an exploded perspective view of the bag caster. FIG. 3 shows a modification of the bag caster. FIG. 4 shows a procedure for attaching the anchor caster.

  1 to 4, the wheel 10 is a grounding member including a tire and a hub. The tire 11 is a rubber or plastic tire. The hub 12 is a plastic bearing / rim. The axle 13 is a member that rotatably supports the wheel. The fork portion 14 is a member that holds the wheel via the axle. The bearing 15 is a bearing that supports the turning shaft. The ball 16 is a bearing ball. The turning shaft 17 is a turning center axis of the fork portion. The washer 18 is a buffer member between the fork portion and the wheel mounting plate. The wheel mounting plate 20 is a substrate that holds the fork portion in a rotatable manner. The screw hole 22 is a screw hole for fixing the wheel mounting plate to the side board. The screw 23 is a screw for fixing the wheel mounting plate to the side board. The heel-side substrate 30 is a receiving-side substrate that is integrated with the heel and for mounting the wheel mounting plate. The central recessed portion 31 is a portion that houses the wheel mounting plate of the wheel mounting plate. The female screw 32 is a female screw for fixing the wheel mounting plate to the lower board.

  The function and operation of the bag caster in Embodiment 1 of the present invention configured as described above will be described. First, an outline of the bag caster will be described with reference to FIG. The heel caster includes a wheel 10, a wheel mounting plate 20, a heel side substrate 30, and the like. The wheel 10 includes a tire 11 and a hub 12. The wheel 10 is attached to a wheel mounting plate 20 via a hub 12, an axle 13, a fork portion 14, a turning shaft 17, and a bearing 15. The fork unit 14 holds the wheel 10 so as to be rotatable on the axle 13. The wheel mounting plate 20 holds the fork portion 14 so as to be turnable by a bearing 15. A circular central recess 31 that detachably accommodates the wheel mounting plate 20 and supports a load is provided in the center of the heel side substrate 30. The heel side substrate 30 is fixed to the heel body with four screws.

  The wheel mounting plate 20 is provided with four screw holes 22 every 90 degrees. Four female screws 32 are provided in the central recess 31 of the heel side substrate 30 every 90 degrees. With the wheel mounting plate 20 fitted in the central recess 31, the wheel mounting plate 20 is fixed with four screws 23 to the heel side substrate 30 fixed to the heel body. All screws 23 are loosened with Loctite. Since it is an assembly exchange system in which the wheels 10 to the wheel mounting plate 20 are exchanged as a set, parts management and parts supply are easy, and repair and maintenance services can be performed quickly and stably.

  Next, each component will be described with reference to FIG. As shown in FIG. 2A, the heel side substrate 30 is attached to the heel body with four screws. There is also a female screw 32 for attaching the wheel mounting plate 20 with four screws 23. You may fix with a self-screw. As shown in FIG. 2 (b), the wheel mounting plate 20 is placed in the central recess 31 of the heel side substrate 30 and is attached to the heel side substrate 30 with four screws 23. The screw 23 is suitably attached with a hexagonal screwdriver, but may be a plus or minus screw.

  When the heel side substrate 30 is removed from the heel caster shown in FIG. 2C, the result is as shown in FIG. Further, when the wheel mounting plate 20 is removed, it becomes as shown in FIG. When the washer 18, the pivot shaft 17, the bearing 15, and the ball 16 are sequentially removed, the result is as shown in FIGS. Further, when the fork portion 14 and the axle 13 are removed, the result is as shown in FIG. 2 (j), and when the tire 11 is further removed, only the hub 12 remains as shown in FIG. 2 (k).

  Next, a modified example of the bag caster will be described with reference to FIG. In this modification, the heel side substrate 30 is formed into a simple disk shape. Suitable for mounting on the flat part of the heel. There is no particular difference in other parts.

  Next, with reference to FIG. 4, a procedure for attaching the anchor caster will be described. As shown in FIG. 4A, when the screw hole 22 is aligned with the position of the female screw 32 of the heel side substrate 30 and the wheel mounting plate 20 is fitted in the central recess 31 of the heel side substrate 30, FIG. It will be in the state shown in. In this state, it is fixed with four screws 23 as shown in FIG. When removing, the four screws 23 are first removed as shown in FIG. Next, as shown in FIG. 4A, the wheel mounting plate 20 is removed from the heel side substrate 30.

  Although the four screws 23 have been described as representatives of the detachable fixing means, other means may be used as long as they have the same function. For example, a rivet that is driven and fixed from one side may be used. To remove it, break it with a drill and remove it. Since the caster is replaced when the caster is damaged, the caster may be fixed using a fixing means integrated with the caster. When the caster is replaced, it may be destructively removed and replaced. In this way, loosening can be prevented at a low cost, and the replacement work is not so complicated, so that repair and replacement can be performed at a store without sending it to the factory.

  As described above, in the first embodiment of the present invention, the heel caster is configured so that the wheel is rotatably held by the fork portion, the fork portion is rotatably held by the wheel mounting plate, and is fixed to the heel body. The wheel mounting plate is fitted in the central recess of the board, and the wheel mounting plate is detachably fixed to the heel side board with four screws, so it is easy and low-cost without reducing the strength of the heel casters. To be replaced.

  In the second embodiment of the present invention, the wheel is rotatably held by the fork portion, the fork portion is rotatably held by the wheel mounting plate, and the inner periphery of the central recess of the heel side substrate fixed to the heel body is 120 degrees. Three grooves are provided for each, and three ridges are provided every 120 degrees on the outer periphery of the central convex portion of the wheel mounting plate, and the wheel mounting plate is attached to the ridge side substrate with one screw in a state where the ridge is fitted in the groove. This is a heel caster that is detachably fixed.

  FIG. 5 shows a conceptual diagram of the bag caster. FIG. 6 shows a procedure for attaching the anchor caster. 5 and 6, the wheel 10 is a grounding member made up of a tire and a hub. The tire 11 is a rubber or plastic tire. The hub 12 is a plastic bearing / rim. The axle 13 is a member that rotatably supports the wheel. The fork portion 14 is a member that holds the wheel via the axle. The wheel mounting plate 20 is a substrate that holds the fork portion in a rotatable manner. The screw hole 22 is a screw hole for fixing the wheel mounting plate to the side board. The screw 23 is a screw for fixing the wheel mounting plate to the side board.鍔 24 is a portion for fitting the wheel mounting plate in the groove on the heel side substrate and holding the wheel mounting plate on the heel side substrate. The heel-side substrate 30 is a receiving-side substrate that is integrated with the heel and for mounting the wheel mounting plate. The central recessed portion 31 is a portion that houses the wheel mounting plate of the wheel mounting plate. The female screw 32 is a female screw for fixing the wheel mounting plate to the lower board. The groove 33 is a part that holds the flange of the wheel mounting plate.

  The function and operation of the bag caster in Embodiment 2 of the present invention configured as described above will be described. First, an outline of the bag caster will be described with reference to FIG. The basic configuration of the bag caster is the same as that of the first embodiment. A circular central recess 31 that detachably accommodates the wheel mounting plate 20 and supports a load is provided in the center of the heel side substrate 30. Three flanges 24 are provided on the outer periphery of the wheel mounting plate 20 every 120 degrees. Three grooves 33 are provided every 120 degrees on the inner periphery of the central recess 31 of the heel side substrate 30. The wheel 24 of the wheel mounting plate 20 is fitted into the groove 33 of the wheel-side substrate 30 after being rotated by 60 degrees. The wheel mounting plate 20 is fixed to the heel side substrate 30 with one screw 23 in a state where the heel 24 is fitted in the groove 33.

  As shown in FIG. 5A, the heel side substrate 30 is attached to the heel body with four screws. Further, the heel side substrate 30 has a female screw 32 for fixing the wheel mounting plate 20 with a single screw 23. You may fix with a self-screw. As shown in FIG. 5 (b), the wheel mounting plate 20 is fixed to the heel side substrate 30 with a single screw 23. The screw 23 is a member for preventing the wheel mounting plate 20 from loosening and does not receive a load applied in a direction in which the wheel mounting plate 20 is detached. The load applied in the direction in which the wheel mounting plate 20 is removed is received by the lid of the groove 33 of the heel side substrate 30.

  Next, with reference to FIG. 6, a procedure for attaching the anchor caster will be described. As shown in FIG. 6A, when the wheel mounting plate 20 is fitted into the central recess 31 of the heel side substrate 30 so that the lid of the groove 33 of the heel side substrate 30 and the ridge 24 of the wheel mounting plate 20 do not overlap. Then, the state shown in FIG. In this state, when the heel side substrate 30 is rotated 60 degrees, the state is as shown in FIG. Since the screw hole 22 of the wheel mounting plate 20 and the female screw 32 of the heel side substrate 30 are aligned, the wheel mounting plate 20 is fixed to the heel side substrate 30 with the screw 23 to obtain the state shown in FIG. When removing, as shown in FIG.6 (c), after removing the screw | thread 23, the wheel attachment board 20 is rotated 60 degree | times. Thereafter, as shown in FIG. 6A, the wheel mounting plate 20 is removed from the heel side substrate 30.

  As described above, in the second embodiment of the present invention, the heel caster is configured to hold the wheel rotatably at the fork portion, hold the fork portion to be rotatable at the wheel mounting plate, and is fixed to the heel body. Three grooves are provided every 120 degrees on the inner periphery of the central recess of the board, three ridges are provided every 120 degrees on the outer periphery of the wheel mounting plate, and the wheel mounting plate is mounted on the heel side board with the ridges fitted in the grooves. Since it is configured to be detachably fixed with a single screw, it can be easily replaced at low cost without reducing the strength of the anchor caster.

  In the third embodiment of the present invention, the wheel is rotatably held by the fork portion, the fork portion is rotatably held by the wheel mounting plate, and a large-diameter female screw is provided in the central recess of the heel side substrate fixed to the heel body. This is a caster for heel that is provided with a large-diameter male screw at the center of the wheel mounting plate, and the wheel-mounting plate is detachably fixed to the heel side substrate with one screw in a state where the large-diameter male screw is screwed into the large-diameter female screw. .

  FIG. 7 shows a conceptual diagram of the bag caster. FIG. 8 shows a procedure for attaching the anchor caster. 7 and 8, the wheel 10 is a grounding member made up of a tire and a hub. The tire 11 is a rubber or plastic tire. The hub 12 is a plastic bearing / rim. The axle 13 is a member that rotatably supports the wheel. The fork portion 14 is a member that holds the wheel via the axle. The wheel mounting plate 20 is a substrate that holds the fork portion in a rotatable manner. The screw hole 22 is a screw hole for fixing the wheel mounting plate to the side board. The screw 23 is a screw for fixing the wheel mounting plate to the side board. The large diameter male screw 25 is a male screw provided at the center of the wheel mounting plate for screwing into the heel side substrate. The heel-side substrate 30 is a receiving-side substrate that is integrated with the heel and for mounting the wheel mounting plate. The central recessed portion 31 is a portion that houses the wheel mounting plate of the wheel mounting plate. The female screw 32 is a female screw for fixing the wheel mounting plate to the lower board. The large-diameter female screw 34 is a female screw cut in the center of the central recess of the heel side substrate in order to receive the large-diameter male screw of the wheel mounting plate.

  The function and operation of the bag caster in Embodiment 3 of the present invention configured as described above will be described. First, an outline of the bag caster will be described with reference to FIG. The basic configuration of the bag caster is the same as in the first and second embodiments. A circular central recess 31 that detachably accommodates the wheel mounting plate 20 and supports a load is provided in the center of the heel side substrate 30. A large-diameter male screw 25 is provided at the center of the wheel mounting plate 20. A large-diameter female screw 34 is provided at the center of the central recess 31. Screw the wheel mounting plate 20 into the heel side substrate 30 with a dedicated tool. With the large-diameter male screw 25 screwed into the large-diameter female screw 34, the wheel mounting plate 20 is fixed to the heel side substrate 30 with a single screw 23. Since the large-diameter male screw 25 is flat, it does not protrude toward the inner side of the bag and does not get in the way.

  As shown in FIG. 7A, the heel side substrate 30 is attached to the heel body with four screws. As shown in FIG. 7 (b), the wheel mounting plate 20 is screwed into the heel side substrate 30. The wheel mounting plate 20 is fixed to the heel side substrate 30 with one screw 23 so as not to loosen. The screw 23 does not receive a load applied in a direction in which the wheel mounting plate 20 is detached. The load applied in the direction in which the wheel mounting plate 20 is removed is received by the large-diameter female screw 34 of the heel side substrate 30. When removing, as shown in FIG.7 (c), after removing the screw | thread 23, the wheel attachment board 20 is rotated with the exclusive tool shown in FIG.7 (e). Thereafter, as shown in FIG. 7 (d), the wheel mounting plate 20 is removed from the heel side substrate 30.

  Next, with reference to FIG. 8, a procedure for attaching the anchor caster will be described. As shown in FIG. 8A, the wheel mounting plate 20 is put in alignment with the heel side substrate 30. As shown in FIG. 8B, the wheel mounting plate 20 is screwed onto the heel side substrate 30 for mounting. As shown in FIG. 8 (c), the wheel mounting plate 20 is rotated with a dedicated tool and tightened so that the screw hole 22 matches the female screw 32. As shown in FIG. 8D, the wheel mounting plate 20 is fixed with screws 23 so as not to loosen.

  As described above, in the third embodiment of the present invention, the heel caster is configured so that the wheel is rotatably held by the fork portion, the fork portion is rotatably held by the wheel mounting plate, and is fixed to the heel body. A large-diameter female screw is provided in the central recess of the substrate, a large-diameter male screw is provided in the center of the wheel mounting plate, and the wheel-mounting plate is attached to the bottom substrate with one screw while the large-diameter male screw is screwed into the large-diameter female screw. Since it is configured to be detachably fixed, it can be easily replaced at low cost without reducing the strength of the heel caster.

  The bag caster of the present invention is optimal as a caster attached to the bag. Besides casters, it is also suitable as a caster used for applications that need to be replaced due to overuse.

10 wheels
11 tires
12 Hub
13 axles
14 Fork
15 Bearing
16 balls
17 Rotating axis
18 Washer
20 Wheel mounting plate
22 Screw holes
23 screws
24 鍔
25 Large diameter male screw
30 Side board
31 Center recess
32 Female thread
33 groove
34 Large diameter female thread

Claims (4)

A wheel composed of a tire and a hub; a fork portion for rotatably holding the wheel on an axle; a wheel mounting plate for rotatably holding the fork portion with a bearing; A heel caster comprising a heel side substrate to be fixed, wherein a circular central recess is provided in the center of the heel side substrate for detachably storing the wheel mounting plate and supporting a load, and the wheel mounting is provided in the central recess. A heel caster comprising a screw for fixing the wheel mounting plate to the heel side substrate with the plate fitted. Four screw holes are provided in the wheel mounting plate every 90 degrees, four female screws are provided in the central recess every 90 degrees, and the wheel mounting plate is fitted in the central recess and fixed to the heel side substrate. 4. The bag caster according to claim 1, further comprising four screws. Three ridges are provided on the outer periphery of the wheel mounting plate every 120 degrees, three grooves are provided on the inner periphery of the central recess every 120 degrees, and the wheel mounting plate is mounted in a state where the ridges are fitted in the grooves. The bag caster according to claim 1, further comprising one screw for fixing to the bag-side substrate. A large-diameter male screw is provided in the center of the wheel mounting plate, a large-diameter female screw is provided in the central recess, and the wheel-mounting plate is fixed to the heel side substrate in a state where the large-diameter male screw is screwed into the large-diameter female screw. The bag caster according to claim 1, further comprising a single screw.

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