JP2017093710A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair, when the wheelchair is used or stored, capable of avoiding such a trouble that wire ropes are caught by or entangled with some objects.SOLUTION: The wheelchair includes: footrests having low-frictional turning parts; reels that can rotate only in one direction normally and, when being released, can rotate in the inverse direction; and wire ropes having one ends attached to the footrests and the other ends attached to the reels. The base end of each wire rope is inserted in a pipe-like frame constituting a wheelchair body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wheelchair, and more particularly to a wheelchair including a footrest opening / closing device.

  Patent Document 1 has various materials, dimensions, and safety devices that can be easily installed without sacrificing design, functionality, and safety in consideration of the standards and dimensions of various wheelchairs that are generally manufactured and marketed. In order to provide a device that allows people with disabilities to remotely open and close the foot plate in a comfortable and comfortable posture, install the operation lever on either the left or right or both sides, eliminate the frictional resistance of the mounting part with the footrest, There is disclosed a footplate opening / closing operation device for a wheelchair in which left and right footplates having free rotation are connected by wire ropes and fixedly guided by a guide hardware.

JP 2005-192959 A

  However, the foot plate opening / closing operation device of Patent Document 1 has all the wire ropes outside, and because of its length, when using a wheelchair, storing it, etc. It can be tangled. In this case, there is also a risk of a wheelchair falling, so improvement is necessary.

  Therefore, an object of the present invention is to provide a wheelchair that avoids the above-mentioned inconvenience.

In order to solve the above problems, the wheelchair of the present invention is
A footrest having a low friction rotating part;
A reel that can only rotate in one direction (normally) in the first state and can rotate in the reverse direction (when released);
A wire rope having one end attached to the footrest and the other end attached to the reel; and
The base end portion of the wire rope is passed through a pipe-shaped frame constituting the wheelchair body.

  Furthermore, when it has a legrest between a footrest and a seat, the base end of the said wire rope may be let the inside of the said legrest pass.

  The wire rope may pass through an opening provided in the frame or may pass through an end of the frame. Further, when an opening is provided, the distance between the pivoting portion of the footrest and the opening is substantially the same as the distance between the rotating portion and the connection position of the wire ropes 30a and 30b in the footrest. It is good to do.

  Moreover, you may implement | achieve rotation with low friction by providing a bearing in the rotation part of the said footrest. The reel may be positioned, for example, such that a wheelchair passenger can reach the hand while sitting on a seat, or a position where the wheelchair caregiver can reach without moving when the wheelchair caregiver moves.

It is a typical block diagram which shows the structure of the wheelchair of embodiment of this invention. FIG. 2 is an enlarged view of the vicinity of a footrest rotating shaft 26b and a reel 50b in FIG. It is the disassembled perspective view which looked at the reel shown in FIG. 1 from diagonally upward. It is the disassembled perspective view which looked at the reel shown in FIG. 1 from diagonally downward.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part. Moreover, the wheelchair provided with the footrest opening / closing device of the present invention is not limited to the one described in this embodiment.

  FIG. 1 is a schematic configuration diagram of a wheelchair according to an embodiment of the present invention. For the sake of explanation, explanations of front, rear, left, and right are given from the viewpoint of a passenger sitting in a wheelchair.

  The wheelchair 10 according to the present embodiment includes a seat seat 40 in which the passenger sits down in a substantially horizontal plane when in use, a back seat 60 that is slightly inclined with respect to the seat seat 40 and receives the back of the passenger, and an upper portion of the back seat 60. Grips 62a and 62b that are held by the assistant when the wheelchair is transported, and footrests 25a that are positioned on the opposite side of the back seat 60 with respect to the seat seat 40 and serve as a rest for the passenger. 25b, front wheel portions 82a, 82b provided in the vicinity of the footrests 25a, 25b, rear wheel portions 84a, 84b located behind the front wheel portions 82a, 82b, frames 21a, 21b connecting these portions, etc. With.

  The frames 21a, 21b, etc. are pipe-shaped made of light alloy such as iron, brass, aluminum, plastic, carbon, titanium, stainless steel, magnesium, duralumin and the like. The arm frames 21a and 21b are mainly attached with elbow pads 29a and 29b which serve as occupant's elbow rests. The arm frames 21a and 21b rise from the front of the seat 40, bend about 90 degrees toward the rear, extend to the frame to which the back seat 60 is attached, and are connected thereto.

  Leg frames 23a and 23b are connected to the arm frames 21a and 21b, respectively. The leg frames 23a and 23b mainly connect the seat 40 and the footrests 25a and 25b. The leg frames 23a and 23b are horizontally bent forward and backward and are bent about 80 degrees in front of the seat 40 and downwardly, and the footrests 25a and 25b are low at the ends. It is connected through the footrest rotating shafts 26a and 26b that can be rotated by friction. Although not limited to this, the footrest rotation shafts 26a and 26b may be provided with bearings to realize low-friction rotation.

  Other frames are not described because they are not related to the present invention and are known.

  The footrests 25a and 25 are made of aluminum, plastic, or the like. When the passenger of the wheelchair 10 gets on and off the wheelchair 10, the footrests 25 a and 25 are turned upward by about 90 ° from the state illustrated with the footrest turning shafts 26 a and 26 b as the center. At the time of boarding, the footrest pivot shafts 26a and 26b are pivoted downward by about 90 ° to obtain the state shown in FIG.

  The footrests 25a and 25b are connected to the reels 50a and 50b via wire ropes 30a and 30b. As will be described later, the reels 50a and 50b can be rotated only in one direction during normal operation, and can be rotated in the reverse direction when released. A weight or the like may be attached to the bottom of the footrest 25a, 25, for example, at a position opposite to the footrest rotating shaft 26a, 26b so that this rotation can be performed smoothly.

  The wire ropes 30a and 30b have one end attached to the footrests 25a and 25b, the other end attached to the reels 50a and 50b, and the base ends to the leg frames 23a and 23b and the arm frames 21a and 21b. Is passed inside.

  The reels 50a and 50b are preferably provided at a position that can be reached by the passenger of the wheelchair so that the passenger of the wheelchair can open and close the footrests 25a and 25b without squatting. Here, as an example, an example is shown in which the rear wheels 84a and 84b are provided in the vicinity of the stopper, but the lower side, for example, the boundary between the arm frames 21a and 21b and the leg frames 23a and 23b. It may be provided in the vicinity. In addition, you may provide in the vicinity of grip 62a, 62b so that a caregiver may operate easily.

  The base ends of the wire ropes 30a and 30b may pass not only inside the leg frames 23a and 23b and the arm frames 21a and 21b but also inside the leg rest 80. Further, the connection destination of the wire ropes 30a and 30b to the footrests 25a and 25b may be the back side of the footrests 25a and 25b so as not to disturb the passenger.

  The wire ropes 30a and 30b are not limited to this, but it is preferable to use a knitted high elastic polyethylene fiber having an extended chain crystal having a diameter of 0.5 mm to 2.0 mm. This is because it has a large strength to weight ratio, is cut resistant, and has a very low elasticity.

  Accordingly, the wire ropes 30a and 30b can be obtained by knitting stainless steel fibers having the same effect, or by adding a solid lubricant such as molybdenum disulfide, graphite, or polytetrafluoroethylene to the stainless steel fibers. Good.

  The arm frames 21a and 21b and the leg frames 23a and 23b may be processed from one pipe or may be connected to another pipe. The arm frames 21a and 21b and the leg frames 23a and 23b are formed with openings 35a and 35b and openings 37a and 37b (FIG. 2) having a size of about 5 mm to 10 mm so as to pass the wire ropes 30a and 30b. ing. It should be noted that the wire ropes 30a, 30b are portions where the wire ropes 30a, 30b are not linear, such as in the vicinity of the openings 35a, 35b, 37a, 37b, near the boundaries between the arm frames 21a, 21b and the leg frames 23a, 23b. A pulley (not shown) is provided so that the wire 30b does not hurt due to friction with the arm frames 21a, 21b and the leg frames 23a, 23b, and the wire frames 30a, 30b are hung on the pulleys. Good.

  The distance between the footrest rotating shafts 26a, 26b and the openings 35a, 35b is substantially the same as the distance between the footrest rotating shafts 26a, 26b and the connection positions of the wire ropes 30a, 30b on the footrests 25a, 25b. Good. This reduces the exposure of the wire ropes 30a and 30b when the footrests 25a and 25b are not used.

  FIG. 2 is an enlarged view of the vicinity of the footrest rotating shaft 26b and the reel 50b in FIG. FIG. 2A shows a state when the footrest 25b is not used. FIG. 2B shows a state when the footrest 25b is used.

  When the footrest 25b is not used, as shown in FIG. 2A, the reel 50b that normally rotates only in one direction may be rotated. Thereby, the wire rope 30b is wound up and moves upward. As a result, the footrest 25b to which the wire rope 30b is connected rotates upward about the footrest rotation shaft 26b.

  Note that the upper limit of the operation of the footrest 25b does not reach the vertical as shown in FIG. Thereby, as will be described below, when the reel 50b is released, the footrest 25b is rotated downward by its own weight.

  That is, when using the footrest 25b, as shown in FIG. 2 (b), the central portion of the reel 50b may be pulled up at the time of release. As a result, the reel 50b rotates in the direction opposite to that during winding. As a result, the winding of the wire rope 30b is also released, and the footrest 25b rotates downward about the footrest rotation shaft 26b by its own weight.

  3 is an exploded perspective view of the reel 50a shown in FIG. 1 as viewed obliquely from above. FIG. 4 is an exploded perspective view of the reel 50a shown in FIG. The reel 50a is roughly divided into a base portion 51a, a spool portion 63a, and a knob portion 71a, which will be described below.

  The base portion 51a has a flange 52a for attaching the reel 50a to the wheelchair 10 main body. The flange 52a can be attached to the main body of the wheelchair 10 using an adhesive, a screw or the like.

  Further, a first wire rope hole 54a1 and a second wire rope hole 54a2 through which the wire rope 50a is passed are formed on the side of the flange 52a. The wire rope 30a enters the reel 50a through the first wire rope hole 54a1 in the base portion, and the tip end portion thereof is connected to a later-described mouth portion 66a of the spool portion 63a.

  A cylindrical housing 53a having a relatively smaller diameter than that of the flange 52a is integrally formed with the flange 52a. The inner wall of the housing 53a meshes with a pawl 73a shown in FIG. 4 so that the reel 50 can rotate only in one direction during normal operation. A plurality of continuous housing teeth 55a, the other of which extends obliquely, are formed. That is, the housing teeth 55a and the pawl 73a realize a ratchet structure. Thereby, the knob part 71a and the spool part 63a rotate in conjunction with each other.

  A cylindrical bearing 56a is located at the center of the housing 53a, and the shaft 74a of the knob portion 71a is inserted therein. Further, a spool portion 63a for winding the wire rope 50a is accommodated in the housing 53a.

  The spool portion 63a includes a groove portion 62a around which the wire rope 50a is wound, and a pair of O-shaped flange portions 61a having a larger diameter than the groove portion 62a. Further, the collar portion 61a is formed with a mouth portion 66a for connecting the tip end portion of the wire rope 30a.

  Further, a through portion 65a through which the shaft 74a of the knob portion 71a is passed is formed in the central portion of the collar portion 61a. Spool teeth 64a that mesh with the knob teeth 72a of the knob portion 71a are formed on the outer periphery of the through portion 65a. These may have a ratchet structure like the housing teeth 55a and the pawls 73a, but it is not necessary to do so, and each tooth portion may have a symmetrical shape toward the tip.

  The reel 50 is normally in a state in which the housing teeth 55a and the pawls 73a are engaged with each other, and in a state in which the knob teeth 72a and the spool teeth 64a are engaged with each other. On the other hand, at the time of release, any of the above meshing states is released by pulling up the knob portion 71a. Thereby, winding of the wire rope 30a is also cancelled.

  As shown in FIG. 4, the knob portion 71a has a double cylindrical structure. The aforementioned pawl 73a is formed on the outer wall of the inner cylindrical portion. The pawl 73a has a shape corresponding to the housing tooth 55a, and thereby meshing with the housing tooth 55a is realized.

  In the present embodiment, the two reels 50a and 50b have been configured to correspond to the two footrests 25a and 25b, respectively, but one reel may be configured to correspond to the two footrests 25a and 25b.

  For example, by passing one of the wire ropes 25a and 25b connected to the footrests 25a and 25b through the legrest 27, the two wire ropes 30a and 30b are connected to the leg frame above the legrest 27. 23a, 23b and the arm frames 21a, 21b can be routed through the same route, so that two wire ropes 30a, 30b can be connected to one reel. That is, the footrests 25a and 25b can be opened and closed with one reel.

  The reel 50a and the like according to the present embodiment are not limited to those having the above-described configuration, and can be connected to one end of the wire rope 30a and the like, and can wind and release the wire rope 30a and the like. If it is.

  Furthermore, in the wheelchair of this embodiment, both the passenger's reel 50a and the assistant's reel 50a can be provided so that both the passenger and the assistant can operate the reel 50a and the like. In particular, when one reel corresponds to the two footrests 25a and 25b, for example, the leg frame 23a and the arm frame 21a are passed through the wire rope 30a connected to the passenger reel 50a. The wire rope connected to the reel 50b for the assistant can be passed through the leg frame 23b and the arm frame 21b side.

10 Wheelchair 21a, 21b Arm frame 23a, 23b Leg frame 25a, 25b Footrest 26a, 26b Footrest rotating shaft 29a, 29b Armrest 30a, 30b Wire rope 35a, 35b Opening 40 Seat seat 50a, 50b Reel 51a Base part 52a Flange 53a Housing 54a1 First wire rope hole 54a2 Second wire rope hole 55a Housing tooth 56a Bearing 60 Back seat 61a Collar part 62a, 62b Grip 63a Spool part 62a Groove part 64a Spool tooth 65a Through part 66a Mouth part 71a Knob part 72a Knob tooth 73a Claw 74a Shaft 80 Leg rest 82a, 82b Front wheel 84a, 84b Rear wheel

Claims (7)

A footrest having a low friction rotating part;
A reel that is rotatable only in one direction in the first state and rotatable in the opposite direction in the second state;
A wire rope having one end attached to the footrest and the other end attached to the reel; and
A wheelchair in which a base end portion of the wire rope is passed through a pipe-shaped frame constituting a wheelchair body.   Furthermore, when it has a legrest between a footrest and a seat, the wheelchair of Claim 1 with which the base end of the said wire rope is passed through the said legrest.   The wheelchair according to claim 1 or 2, wherein the wire rope may pass through an opening provided in the frame or may pass through an end of the frame.   The position of the opening adjacent to the footrest is approximately the same distance as the distance to the connection position where the wire rope is fixed to the footrest with reference to the footrest rotation axis serving as the rotation center of the footrest. The wheelchair according to claim 1 or 2, wherein the wheelchair is positioned in the position.   The wheelchair according to claim 1 or 2, wherein a bearing is provided at a rotating portion of the footrest.   The wheelchair according to claim 1 or 2, wherein the reel is in a position that a wheelchair passenger can reach while sitting on a seat.   The wheelrest footrest opening / closing device according to claim 1 or 2, wherein the reel is located near a grip that a wheelchair caregiver grips when transporting the wheelchair.

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