JPH10127697A - Foot rest structure of wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change the angle of a foot placing table by freely rotatably attaching the foot rest table to a pivotally attaching axis provided at the tip of a supporting arm to be freely rotated and adjustably providing a regulating member restricting the rotating range of a connecting piece on a locus for the rotation of a pivotally attaching axis. SOLUTION: In a wheelchair where a foot rest 6 with a foot placing table 6a is provided by projecting downward on the front sides of a pair of side frames, supporting arms 6c for adjusting the height of the table 6a are attached to both sides of the front end of a seat. At the tip of these arms 6c, a pivotally attaching axis 6e freely rotated in a vertical direction with a horizontal axis 6d orthogonal with the arms 6c is provided to attach the table 6a at a horizontal foot placing position and an upper/external housing position at the axis 6e to be freely rotated. In addition the connecting piece 6a is extended behind the axis 6d and a screw member 20 in contact with a screw tip 21 is screwed to its upper side so as to position a screw head 22 at the arm 6c to vary the angle of the table 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair footrest structure on which a user of a wheelchair can place his / her feet in an easy posture of an ankle.

[0002]

2. Description of the Related Art A wheelchair is provided with a footrest on which a user of the wheelchair places his or her feet when moving.
This footrest has a footrest position in which the front of each side frame on both sides of the wheelchair body projects diagonally downward, and at each end, the footrest is almost horizontally opened inside the footrest on which the foot is placed. Like the wheelchair body, it is foldably provided so as to open upward from the outside.

[0003]

The angle of attachment of the footrest to the wheelchair in the footrest is set so that elderly people who use the wheelchair or people with physical disabilities, such as those with physical disabilities, can easily sit on the wheelchair. desirable. The angle from the end of the seat surface to the footrest when the occupant extends his / her legs,
It is not perpendicular to the ground, but at the same angle as the front of the side frame. The pivot axis of the footrest extends perpendicularly to the front part of the side frame as shown in the related art, and the angle of the ankle is 90 degrees when the foot is placed on the footrest. Because of this, some people may have a comfortable posture at other angles, and a wheelchair that can change the angle of the footrest has been desired.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a footrest structure in which the angle of a footrest can be changed. In a wheelchair, a support arm is attached by projecting diagonally forward and downward, and a footrest is attached to the tip of each of the support arms so as to be rotatable between an inner footrest position and an upper outer storage position. At the tip of the support arm, a pivot shaft is provided which is rotatable vertically about a horizontal axis orthogonal to the support arm, and the footrest is rotatably attached to the pivot shaft, and By providing a regulating member that restricts the rotation range of the connecting piece on the locus of rotation of the shaft in an adjustable manner, the footrest position of the footrest can be set to an arbitrary angle with respect to each support arm. So on a footrest The angle of the ankle, which was can be set so as to be comfortable posture. The restricting member is screwed to a connecting piece provided in front of or behind the horizontal axis of the pivot shaft or to the support arm, and to the support arm itself or the support arm integrally provided with the extension member. A screw member having a tip contacting the upper side or the lower side of the connecting piece, and in particular, a connecting piece provided on the horizontal axis rear side of the pivot shaft, and screwed to the support arm, It is preferable that a screw member having a tip contacting the upper side of the connecting piece is provided. With the screw member, the footrest position of the footrest can be set to an arbitrary angle with respect to each support arm, and the screw Since the head is located on the occupant side, adjustment of the regulating member can be easily performed. Further, the regulating member is provided with a connecting piece provided in front of, behind, or below the horizontal axis of the pivot shaft, and is screwed to the connecting piece, and a tip of the restricting member is above or below a mounting member of the pivot shaft. A screw member may be provided on the side or in contact with the support arm, but preferably, the restricting member is provided with a connecting piece provided on the horizontal axis rear side of the pivot shaft, and is screwed to the connecting piece, and has a tip. Is a footrest structure including a screw member that contacts the lower side of the mounting member of the pivot shaft, and the screw member sets the footrest position of the footrest at an arbitrary angle with respect to each support arm, The upper surfaces of the footrest and the mounting member become smooth, and the foot can be freely moved by the footrest.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wheelchair footrest according to the present invention will be described with reference to the drawings. FIG. 1 shows a wheelchair equipped with a footrest according to the present invention. A body 1 of the wheelchair is composed of a pair of side frames 1a, 1a formed symmetrically through processes such as cutting, bending and welding of a pipe frame. Are connected by X-shaped links 2 and 2 so that the side frames 1a and 1a can be folded while maintaining the parallel standing state until the side frames 1a and 1a come into close contact with each other from the state where the interval between the side frames 1a and 1a is widened. A mode of use in which the distance between the side frames 1a, 1a is widened will be described. Between the side frames 1a, 1a, a seat 3 is formed by extending a seat portion 3a and a backrest 3b, which are formed of seating material, horizontally and vertically, respectively, and the main body 1 having such a seat 3 is provided. On both sides, auxiliary wheels 4 and 4 are respectively mounted on the front part so as to be rotatable and the mounting shaft is turned freely in the horizontal direction, and driving wheels 5 and 5 are provided on the rear part.
Each is provided rotatably. Each side frame 1
A footrest 6 having a footrest 6a at the end thereof is projected forward and obliquely downward, and a sheet material as an inflatable shin support 6b is stretched at an intermediate portion of the footrest 6 in front of the footrest 6a. At the rear, handles 7, 7 for an attendant to push and move the wheelchair are provided so as to protrude rearward from above, and grip levers 8a, 8a are attached to the handles 7, 7, respectively. The grip lever 8a enables the operation of the drum type brake mechanism 8 mounted on the rotating shaft of the driving wheel 5.

An armrest 9, a guard plate 10 and a mudguard 11 are integrally attached to the side frames 1a, 1a, respectively, and a driving ring 12 is provided integrally with the driving wheels 5. Further, the main body 1 has side levers 13 on both sides of the seat, and tires 5 by rotating the side levers 13.
and a locking device 14 having a W-shaped cross section 14 which is moved toward and away from the center in the center direction. , And the tire 5a turns to be completely locked.

FIG. 2 shows the mounting structure of the footrest 6.6.
This will be described below. At the tip of the footrest 6, support arms 6c capable of adjusting the height of the footrest 6 from the ground are slidably attached to both sides of the front end of the seat of the wheelchair body, and two lower ends of the support arms 6c are provided. 6h of extension members
Are extended in parallel, and a pivot shaft 6e is provided between the extending members 6h so as to be vertically rotatable about a horizontal shaft 6d orthogonal to the support arm 6c. In FIG. 2 and subsequent figures, the extension member on the near side is omitted. The footrest 6 is attached to the pivot 6e.
a is rotatably attached to a footrest position which is indicated by a solid line and is horizontally inward and a storage position which stands upward and outward as indicated by a two-dot chain line 6a1. A cap 6f for preventing stopping is fitted. Pivot 6
e, a connecting piece 6g extends in the longitudinal direction behind the horizontal axis 6d, and a screw member 20 in which a screw tip 21 contacts the upper side of the connecting piece 6g, and a screw head 22 on the support arm 6c has an upper side. It is screwed so that it is located. Thereby, when the screw member 20 is rotated downward, the screw portion tip 21 presses the connecting piece 6g downward, and the footrest 6a located on the opposite side of the horizontal shaft 6d is indicated by a two-dot chain line 6a2. As shown in the figure, the angle between the footrest 6a and the support arm 6c can be set to an acute angle smaller than a right angle. Conversely, screw member 2
When the screw 0 is loosened and turned upward, the screw tip 21 pulls the connecting piece 6 g upward, the tip of the footrest 6 a falls downward as shown by the two-dot chain line 6 a 3, and the footrest 6 a and the support arm 6c can be set to an obtuse angle larger than a right angle.
Therefore, the setting of the footrest on which the occupant puts his / her foot can be set to a setting angle that provides a comfortable posture other than the conventional 90 degrees.

In the above embodiment, the right and left footrests are individually angle-adjusted. However, the left and right set angles can be synchronized, or they can be interlocked with a wheelchair folding mechanism. Further, the footrest structure of the present invention can be applied not only to the left-right folding wheelchair shown in the embodiment but also to a front-rear folding wheelchair, a non-foldable fixed wheelchair, and an electric wheelchair.

The footrest structure according to FIG.
e, a connecting piece 6g provided at the rear of the horizontal axis 6d before and after e.
A screw member 20 that is screwed to the support arm 6c and whose tip contacts the upper side of the connecting piece 6g, and the screw head 22 of the screw member 20 is positioned on the upper side on the occupant side to set the angle. However, as shown in FIG. 3, a connecting piece is provided in front of the horizontal axis 6d of the pivot shaft 6e so as to also serve as the pivot shaft, as shown in FIG.
The screw member 20 is screwed to the extension member 6h integrally extending from the support arm 6c below the horizontal shaft 6d, and the distal end thereof is connected to the connecting piece 6.
By contacting the lower side of g, the protrusion can be removed on the upper surface of the footrest 6a so that the foot can be moved smoothly, and the screw member 20 extends from the support arm 6c which is positioned below the horizontal shaft 6d. Since the member 6h can be fixed to the existing wheelchair, the existing wheelchair can be easily improved and used. Further, as shown in FIG. 4, a connecting piece 6g extending downward from the top and bottom of the horizontal axis 6d of the pivot shaft 6e and a screw hole penetrated by the support arm 6c itself are screwed, and the tip is connected to the connecting piece 6g. And a screw member 20 that contacts the side.

Next, as shown in FIG. 5, the screw member 20 is screwed to the connecting piece 6g provided on the lower rear side of the horizontal shaft 6d of the pivot shaft 6e with respect to the footrest structure shown in FIG. The tip is brought into contact with the lower side of the extension member 6h to which the pivot shaft 6e is attached, and the upper surfaces of the footrest 6a and the extension member 6h are provided smoothly, thereby eliminating the protrusion on the upper surface of the footrest 6a. You can move your feet smoothly. FIG.
The footrest structure shown in FIG.
6, the screw member 20 comes into contact with the support arm 6c, and the extension member 6h for screwing the screw member 20 extends below the horizontal shaft 6d. Further, in all of the above footrest structures, the pivot shaft 6e is provided on the support arm 6c so that the extending member 6h is integrally rotatable. However, as shown in FIG. 6, the pivot shaft 6e passes through the screw hole. Support arm 6c
The screw member 20 can be screwed as an extension member 6g to a rotation preventing member which is provided rotatably and holds the footrest 6a in a horizontal position. In all of the above footrest structures, a pivot shaft is provided at the tip of the support arm so as to be vertically rotatable around a horizontal axis orthogonal to the support arm, and the footrest is turned around the pivot shaft. Attaching movably, and by providing a screw member that limits the rotation range of the connecting piece on a locus of rotation of the pivot shaft, the footrest position of the footrest can be adjusted by A regulating member which can be set at an arbitrary angle with respect to the support arm, but which can restrict a rotation range of the connecting piece, particularly a footrest position which is a lower limit of the footrest, on a locus of rotation of the pivot shaft. If it is, it is not limited to a screw member.

[0011]

According to the footrest structure of the present invention, the footrest position of the footrest can be set to an arbitrary angle with respect to each support arm, so that the angle of the ankle placed on the footrest can be set to a comfortable posture. Since it can be easily set, it is possible to sit in a wheelchair for a long time without an excessive ankle angle unlike a conventional wheelchair. In particular, by using a screw member as the restricting member, the rotation range of the pivot shaft can be limited by a simple operation, and the connecting arm provided behind the horizontal shaft of the pivot shaft is screwed to the support arm. By bringing the tips of the set screw members into contact, the screw heads of the screw members that can be easily adjusted are located on the occupant side, and the angle setting of the footrest becomes easy. Similarly, the upper surface of the footrest and the mounting member becomes smooth by having the screw member screwed to the connecting piece provided behind the horizontal axis of the pivot shaft contact the mounting member of the pivot shaft, The feet can be moved freely with the footrests.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wheelchair equipped with a footrest according to the present invention.

FIG. 2 is an explanatory view showing a partial cross section of a footrest.

FIG. 3 is an explanatory diagram showing another embodiment.

FIG. 4 is an explanatory diagram showing another embodiment.

FIG. 5 is an explanatory diagram showing another embodiment.

FIG. 6 is an explanatory view showing another embodiment.

FIG. 7 is an explanatory view showing another embodiment.

[Explanation of symbols]

1. Body, 1a, 1a Side frame, 2 X
-Shaped links, 3 seats, 3a seats, 3b backrests, 4 auxiliary wheels, 5 drive wheels, 5a tires, 6 footrests, 6a footrests, 6b・ ・
Inflatable shin support, 6c ... support arm, 6d ... horizontal axis,
6e · · · pivot shaft, 6f · · cap, 6h · · · extending member, 6g · · · connecting piece, 7 · handle, 8 · · drum type brake mechanism, 8a · · grip lever, 9 · elbow rest, 10 guard plate, 11 mudguard, 12 drive ring, 13 side lever, 14 locking body, 20
..Screw member, 21..Screw tip, 22..Screw head.

Claims (3)

[Claims] 1. A support arm is attached to both sides of a front end of a seat portion of a wheelchair body so as to protrude obliquely downward and forward, and the tip of each support arm is rotatable between an inner footrest position and an upper outer storage position. In a wheelchair having a footrest attached to the support arm, a pivot shaft is provided at the tip of the support arm, the pivot shaft being rotatable up and down around a horizontal axis orthogonal to the support arm. A footrest is rotatably mounted, and a regulating member for limiting the rotation range of the connecting piece is provided on a locus of rotation of the pivot shaft so as to be adjustable. A footrest structure for a wheelchair, characterized in that the placement position can be set to any angle with respect to each support arm. 2. The control member according to claim 1, further comprising: a connecting piece provided behind the pivot shaft on a horizontal axis; and a screw member screwed to the support arm and having a tip contacting an upper side of the connecting piece. The footrest structure for a wheelchair according to claim 1, wherein the footrest position of the footrest is set to an arbitrary angle with respect to each support arm by a screw member, and a screw head of the screw member is located on the occupant side. 3. The connecting member provided behind the horizontal axis of the pivot shaft, a screw member screwed to the connecting member, and a tip of which contacts a lower side of the mounting member of the pivot shaft. 2. The method according to claim 1, wherein the footrest position of the footrest is set to an arbitrary angle with respect to each support arm by the screw member, and the upper surfaces of the footrest and the mounting member are provided smoothly. Wheelchair footrest structure.