JPH06427U - Sitting wheelchair - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sitting position wheelchair with a footrest that allows a caregiver to move and rest while allowing a disabled child with a low sitting capacity to take a correct sitting position. . [Structure] Seat frame 30 having angle adjusting hole 82
The knee angle adjusting plate 81 fixed to the front end of the seat and the calf pad 90 have the upper end pivotally attached to the knee angle adjusting plate 81 and guided in the angle adjusting hole 82 to guide the seat frame 3
A footrest stay 85 provided so as to be capable of being fixed at an arbitrary angle by being folded from the angle substantially orthogonal to 0 to the bottom surface side of the seat frame 30 and rotating between angles substantially parallel to each other. The footrest 80 is composed of a footrest 95 which is pivotally attached to the lower end of the footrest and has a stopper 96 for restricting its rotation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sitting position holding wheelchair having a footrest suitable for a user having an obstacle in the bending angle of a knee joint.

[0002]

[Prior art]

 Conventionally, a wheelchair is generally configured to include a footrest fixed downward at a constant angle on the front side of a seat.

However, when a foot is injured, a wheelchair provided with such a fixed footrest is inconvenient. For this reason, for example, the footrest can be swung forward and upward for a person wearing a cast for treating fractures of the foot, etc., and the footrest can be positioned in front of the seat from a downward angle of about 90 degrees with respect to the seat surface. There has been proposed a wheelchair provided with a footrest configured to rotate to an angle forming substantially the same plane as the above (see, for example, Japanese Utility Model Publication No. 57-8819).

[0004]

[Problems to be solved by the device]

 However, if a child with cerebral palsy or the like who has strong muscle tension and low ability to hold a sitting position uses a wheelchair equipped with the above-mentioned footrest, the tension of the user may be increased, and the chair seat may become unstable. there were.

The present invention has been made in view of the above, and enables a handicapped child having a low sitting ability to take a correct sitting position, and a sitting position with a footrest that allows a caregiver to move and rest. The purpose is to provide a holding wheelchair.

[0006]

[Means for Solving the Problems]

 The present invention has been made to achieve the above object, and has a knee angle adjusting plate having an angle adjusting hole and fixed to the front end of the seat frame, and a calf pad, and the upper end has the knee angle adjusting plate. It is pivotally attached to the plate and guided by the angle adjusting hole, and is rotated between an angle that is substantially orthogonal to the downward direction of the seat frame and an angle that is substantially parallel to the bottom surface of the seat frame. A footrest comprising a footrest stay that can be fixed at an arbitrary angle and a footrest that is pivotally attached to the lower end of the footrest stay and that has a stopper that restricts its rotation This is a wheelchair for maintaining a sitting position.

[0007]

[Action]

 The present invention is configured as described above, and in the footrest of the sitting position holding wheelchair, the footrest stay is engaged and guided in the angle adjusting hole of the knee angle adjusting plate, and is directed downward with respect to the seat frame. Rotate from an angle that is substantially orthogonal to an angle that is substantially parallel to the bottom of the seat frame, and then tighten and fix at any angle to adjust to the optimum knee angle of the user.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a sitting chair according to this embodiment, FIG. 2 is a front view, and FIGS. 3 and 4 are a side view and a front view of a footrest.

A sitting position wheelchair (hereinafter, wheelchair 1) denoted by reference numeral 1 in the drawing has a front frame 10 to which a pair of front wheels 19 are attached, a pair of rear wheels 29, and an upper end portion of which is a front portion. A rear frame 20 pivotally attached to the frame 10, a seat frame 30 having a pair of front sliders 33 and a pair of rear sliders 35, a seat angle locking mechanism 40, a back frame 50 that can be tilted rearward, and an axial direction. A pair of slide pipes 60 that can swing in the direction, an armrest pipe 65 that is fitted in the slide pipe 60 and slides, and a rear end portion of which is pivotally attached to the back frame 50, a back angle lock mechanism 70, The seat frame 30 is mainly composed of a footrest 80 pivotally attached to a front end portion of the seat frame 30.

The front frame 10 has a pair of left and right front pipe portions 11, and the front pipe portion 11 has a plurality of locking holes (not shown) linearly formed at predetermined positions and lateral The shell 13 is fixedly formed on the frame. A pair of front wheels 19 made of caster wheels are attached to the lower end of the front frame 10.

The rear frame 20 has U-shaped bent rear pipe parts 21 and 21 facing each other on the left and right, and a pair of rear wheels 29 are attached to a lower end part thereof. The upper end of the rear frame 20 is pivotally attached to the upper end of the front frame 10 by a shaft 23. When the wheelchair 1 is in use, as shown in FIG. The portion extends forward, and the lower end portion of the rear frame 20 extends rearward to form a divergent shape.

This divergent shape is formed so that it can be held by a stopper 25 that can be bent upward by the bending portion 25 a, and the front end portion of the stopper 25 is pivotally attached to the middle portion of the front pipe portion 11 by a shaft 26. The rear end portion is pivotally attached to the lower end portion of the rear pipe portion 21 by a shaft 27. The stopper 25 bends so that the lower end of the front frame 10 and the lower end of the rear frame 20 come close to each other and are in a folded state. Reference numeral 22 is a stop ring that defines the upper limit of sliding of the rear slider 37.

The seat frame 30 has a pair of seat pipe portions 31 opposed to each other in the front-rear direction, and a horizontal shaft 32 is fixed to the seat pipe portion 31 to form a frame shape. A seat 33 is stretched on the upper surface of the seat frame 30.

The front slider 35 is made of a tubular member which is fitted onto the front pipe portion 11 and is slidable, and a synthetic resin tubular member for smoothing sliding is provided on the inner peripheral surface thereof. There is. A seat angle locking mechanism 40 is attached to the front slider 35, and its locking pin is provided so as to be able to advance and retract into the locking hole 12 of the front pipe portion 11 from the inner peripheral surface of the front slider 35. There is. The front slider 35 is rotatably attached to the left and right side surfaces of the front end portion of the seat frame 30 by a shaft 36 having a horizontal axis line.

The rear slider 37 is made of a tubular member that is fitted onto the rear pipe portion 21 and is slidable, and a synthetic resin tubular member for smoothing sliding is provided on the inner peripheral surface thereof. There is. The rear slider 37 is rotatably attached to the left and right side surfaces of the rear end portion of the seat frame 30 by a shaft 38 having an axis line in the left-right direction. As a result, the seat frame 30 is formed so as to be swingable between the substantially horizontal position and the front end portion of the seat frame 30 at an upward position of about 40 degrees.

The seat angle lock mechanism 40 has a locking pin (not shown) that is always advanced into the locking hole of the front pipe portion 11 and biased so that it can be engaged, and can be operated by the release lever 43. Therefore, the engagement can be released by retreating from the inside of the locking hole through the release wire 44. By selecting the plurality of locking holes, the upper and lower positions of the front slider 35, that is, the seat angle of the seat frame 30 can be selected and fixed. The front frame 10, the rear frame 20, the seat frame 30, and the seat angle locking mechanism 40 constitute a seat angle adjusting mechanism.

The lower portion of the back frame 50 is pivotally attached to the rear end of the seat frame 30 by a shaft 54, and is tiltable between a substantially upright position and a rearward and substantially horizontal position. A backrest 52 is stretched on the front surface of the back frame 50. A handle 55 for a caregiver to push by hand is provided on the upper end of the back frame 50 by a fixing screw 56 so that the vertical position can be adjusted.

The slide pipe 60 is made of a tubular member which is fitted with the armrest pipe 65 and is slidable, and a cylindrical member made of synthetic resin for smoothing sliding is internally provided on the inner peripheral surface thereof. . A back angle lock mechanism 70 is attached to the slide pipe 60, and its locking pin is provided so as to be able to advance and retract from the inner peripheral surface of the slide pipe 60 into a locking hole of an armrest pipe 65 described later. ing. The pair of slide pipes 60 are swingably attached to the shaft 23 with their axes oriented in the front-rear direction.

The armrest pipe 65 is made of a straight tubular member that can be fitted into the slide pipe 60, and has a plurality of locking holes (not shown) linearly formed at predetermined positions. The rear end of the arm rest pipe 65 is pivotally attached to the center of the back frame 50 by a shaft 69, and a pad 67 is fixed to the upper portion of the arm rest pipe 65 via spacers 68, 68.

The back angle lock mechanism 70 has a locking pin (not shown) that is always advanced into the locking hole of the armrest pipe 65 and is urged to be engageable. Thus, the engagement can be released by retreating from the inside of the locking hole of the armrest pipe 65 via the release wire 74. By selecting a plurality of the locking holes, the front and rear positions of the armrest pipe 65, that is, the back angle of the back frame 50 can be selected and fixed. The slide pipe 60, the armrest pipe 65, and the back angle lock mechanism 70 constitute a back angle adjusting mechanism.

The footrest 80 includes a knee angle adjusting plate 81 fixed to a front end portion of the seat frame 30, a footrest stay 85 pivotally attached to the knee angle adjusting plate 81, and a foot end stay 85 pivotally attached to a lower end portion of the footrest stay 85. It is mainly composed of a worn footrest 95.

The knee angle adjusting plate 81 is provided with an arcuate angle adjusting hole 82 at a predetermined position, and a footrest stay 85 is pivotally attached to the center point of the arc by a shaft 91. The footrest station 85 has an arm 87 protruding rearward at the upper end thereof, and has a plurality of height adjustment holes 86 pivotally attached to the footrest 95 having a left-right axis in the lower half portion. Has been done. A bolt 88 is projectingly provided on the arm 87, the bolt 88 penetrates the angle adjusting hole 82, and a fixing knob 89 is screwed to the protruding end portion thereof.

Therefore, in the footrest stay 85, the bolt 88 is guided by the angle adjustment hole 82, and the footrest stay 85 extends from a downward angle substantially orthogonal to the seat frame 30 to an angle substantially parallel to the bottom surface side of the seat frame 30. It is configured to be rotatable, and can be fixed at an arbitrary angle by tightening the fixing knob 89. Reference numeral 90 is a cloth calf pad which is stretched between the footrest stays 85 and 85 and whose lower end is attached to the footrest 95.

The footrest 95 is made of a flat plate-like member and is configured by arranging a pipe member on the outer peripheral edge. The rear end of the footrest 95 is rotatably attached to the height adjusting hole 86 of the footrest stay 85 by a shaft 97, and the footrest 95 rotates forward to be substantially orthogonal to the footrest stay 85. This position is defined by the stopper 96 and a position which is rotated upward and is substantially parallel to the footrest stay 85.

Further, the wheelchair 1 is provided with a brake mechanism 75 and a headrest 98 as shown in the figure.

The brake mechanism 75 is mounted on the lower end of the rear frame 20, and is configured to brake the rotation of the rear wheel 29 via the brake wire 77 by operating a brake lever 76 provided on the handle 55. Has been done. The brake mechanism 75 is configured to be able to maintain the braking state of the rear wheel 29 by pressing the brake bar 78, and this braking state is released by operating the release pedal 79.

The headrest 98 has a head rest 99 and is configured to be adjustable in vertical position, front-back position, and left-right position, and is mounted on the upper portion of the back frame 50.

Next, a usage mode of the wheelchair configured as described above will be described.

FIG. 1 shows one mode of use of the wheelchair 1, in which the lower ends of the front frame 10 and the rear frame 20 have a divergent shape, and the stopper 25 maintains the shape. The seat frame 30 is fixed to a substantially horizontal seat angle by a back angle lock mechanism 40, and the back frame 50 is fixed to a substantially upright back angle by a back angle lock mechanism 70. The armrest pipe 65 is kept parallel to the seat frame 30. The headrest 98 is fixed in position by appropriately adjusting the vertical, front-rear, and left-right positions of the head rest 99.

The angle of the footrest stay 85 of the footrest 80 can be adjusted within a range from an angle substantially orthogonal to the seat frame 30 to an angle substantially parallel to the bottom surface side of the seat frame 30, and a knee suitable for the user. At an angle, it is fixed by tightening the fixing knob 89. The relative angle between the footrest stay 85 and the seat frame 30 does not change even when the seat angle of the seat frame changes, and the footrest 80 tilts while maintaining the set knee angle (see FIG. 5). .

In order to adjust the seat angle of the seat frame 30 of the wheelchair 1, first, the release lever 43 of the seat angle lock mechanism 40 is operated, and the lock pin is retracted to lock the lock currently engaged. Pull out from the hole. Then, the front end of the seat frame 30 is lifted to move the front slider 35 upward. At this time, the seat frame 30 swings about the center of its front-rear direction as the center of rotation, and the rear end portion of the seat frame 30, that is, the rear slider 37 descends by an amount commensurate with the above. Then, at the desired seat angle, the locking pin is advanced into and engaged with the other locking hole, and the seat frame 30 is fixed at that seat angle.

The rear end portion of the armrest pipe 65 is interlocked with the change in the height position of the rear end portion of the seat frame 30, and the axis of the armrest pipe 65 is inclined as the seat frame 30 is inclined. To return the seat frame 30 to the horizontal state, the rear end of the seat frame 30 is lifted opposite to the above.

In order to adjust the back angle of the back frame 50, first, the release lever 73 of the back angle lock mechanism 70 is operated, and the locking pin thereof is retracted and withdrawn from the currently engaged locking hole. . Next, when the back frame 50 is tilted rearward, the armrest pipe 65 moves rearwardly. Then, at a desired back angle, the locking pin is advanced into and engaged with another locking hole, and the back frame 50 is fixed at that back angle. At this time, the armrest pipe 65 is on the side of the inclined back frame 50 and supports the user's body.

When adjusting both angles of the seat frame 30 and the back frame 50 at the same time, the release lever 43 of the seat angle lock mechanism 40 and the release lever 73 of the back angle lock mechanism 70 are simultaneously operated to release the lock. I do. Next, the back frame 50 is pushed down in a substantially vertical direction to tilt the back frame 50 rearward while lowering the rear end of the seat frame 30. As a result, the occupant can take a relaxed posture without changing the relative angle between the seat frame 30 and the back frame 50.

In order to put the wheelchair 1 into the folded state, from the use state of FIG. 1, first, the bending portion 25a of the stopper 25 is lifted upward to bend it, and the release lever 73 of the back angle lock mechanism 70 is operated. The locking of the back frame 50 by the locking pin 71 is released.

When the back frame 50 is pushed down in a substantially vertical direction while the back angle lock mechanism 70 is unlocked, the front slider 35 is moved downward while the rear slider 37 is engaged with the frant pipe 11. As a result, the back frame 50 and the rear frame 20 are brought into a vertical state and come close to each other, and the rear end of the armrest pipe 65 is lowered to be brought into a vertical state along the back frame 50. Further, in the seat frame 30, the rear slider 37 descends and the front slider 35 moves above the seat frame 30 to be in a substantially vertical state, and the front slider 35 draws the front frame 10 rearward, so that the seat frame 30 is positioned most toward the rear frame 20. Move to an adjacent folding position.

In this way, the front frame 10, the rear frame 20, the seat frame 30, the back frame 50, and the armrest pipes 65 are in a substantially vertical state and overlap each other in the front-rear direction, and the pair of front wheels 19 and the pair of rear wheels 29. It is stored in the inner space of the. Then, the knee angle adjusting plate 81 is adjusted to bend the footrest 80 to the seat frame 30 side, and the footrest 81 is rotated upward to form the folded state of the wheelchair 1 (see FIG. 6).

[0038]

[Effect of device]

 As described above, according to the sitting-position holding wheelchair of the present invention, a disabled child having strong muscle tension and low sitting-position holding ability can be adjusted to a suitable knee angle to maintain a proper sitting position.

Further, by providing the seat angle adjusting mechanism in the seat, the footrest can be tilted as the seat angle changes. As a result, even if the seat angle is adjusted, the relative angle between the seat and the footrest is not changed, and the knee angle can be maintained and the resting posture can be taken.

As described above, according to the present invention, the knee angle of the user is adjusted to an optimal angle that does not cause tension, and abnormal tension of the user is suppressed, and training for impaired function recovery can be performed. Produce the effect of.

[Brief description of drawings]

FIG. 1 is a side view of a sitting chair according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged side view of the footrest.

FIG. 4 is a front view of FIG.

FIG. 5 is a side view illustrating a footrest that interlocks with seat angle adjustment.

FIG. 6 is a side view showing a folded state.

[Explanation of symbols]

 1 sitting wheelchair 10 front frame 20 rear frame 30 seat frame 50 back frame 80 footrest 81 knee angle adjusting plate 82 angle adjusting hole 85 footrest stay 90 calf pad 95 footrest 96 stopper

Claims (1)

[Scope of utility model registration request] 1. A knee angle adjusting plate having an angle adjusting hole fixed to a front end of a seat frame, and a calf pad having an upper end pivotally attached to the knee angle adjusting plate and at the angle adjusting hole. A footrest stay that is provided so that it can be fixed at an arbitrary angle by being guided and rotated from an angle that is substantially orthogonal to the seat frame downward to a position that is folded and folded to be substantially parallel to the bottom surface side of the seat frame. A wheelchair for holding a sitting position, comprising: a footrest that is pivotally attached to a lower end portion of the footrest stay and that has a stopper that restricts the rotation of the footrest stay;