JP2000201979A - Footrest fitting structure for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure excellent appearance while having no anxiety about pinching a finger or the like when fitting a footrest pipe to a support pipe. SOLUTION: The other end 4b of a footrest pipe 4 with a footrest F fitted to one end 4a is retractably inserted in a support pipe 5 provided at the front part of a side face frame of a wheelchair body. A clamping member 6 inserted in the other end 4b of the footrest pipe 4 is pressed to the inner peripheral surface of the footrest pipe 4 by a tightening knob 8 through a clamping bolt 7 inserted through the support pipe 5 and the footrest pipe 4, to clamp the footrest pipe 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a footrest mounting structure for a wheelchair.

[0002]

2. Description of the Related Art Conventionally, a footrest for supporting a caregiver's foot is projected from a distal end portion of a body frame of a wheelchair. The footrest is detachably attached to the main body frame so as not to obstruct the caregiver from getting up from the wheelchair or to move the caregiver to the bed or the like. The mounting structure of the footrest is disclosed, for example, in Japanese Utility Model Publication No. 57-10660. As shown in FIG. 8, the footrest mounting structure disclosed in this publication mounts a footrest 91 at one end of a footrest pipe 90 and a bracket 92 at the other end thereof.
2 is detachably attached to a leg pipe 94 of a side frame by a lock device 93. The lock device 93 is attached to the leg pipe 94 so as to be able to advance and retreat in the front-rear direction, and a hook portion 93a urged backward by a spring
And a cam lever 93 for moving the clamp shaft 93b forward and backward by a rotating operation.
c, and the clamp shaft 93b is inserted into a dharma hole 92a formed in the bracket 92 so that a hook 93
When the cam lever 93c is rotated and the clamp shaft 93b is pulled rearward while the a is locked on the front surface of the bracket 92, the hook 93a and the pedestal 96 fixed to the leg pipe 94 are pulled. With this, the bracket 92 can be sandwiched and attached to the leg pipe 94.

[0003]

According to the above-mentioned conventional footrest mounting structure, the footrest pipe 90 can be mounted on the leg pipe 94 without looseness, but since the lock device 93 is exposed to the outside, the footrest pipe 90 When attaching to the leg pipe 94, there is a problem that the safety is inferior and the appearance is deteriorated, for example, a finger is packed between the bracket 92 and the pedestal 96. The present invention has been made in view of the above problems, and has as its object to provide a footrest mounting structure for a wheelchair that can ensure safety and does not impair the appearance.

[0004]

According to the present invention, there is provided a footrest mounting structure for a wheelchair according to the present invention, wherein a support pipe provided at a front portion of a side frame of a wheelchair main body and one end are connected to the footrest. The other end of the footrest pipe is removably inserted into the support pipe, the clamp member inserted inside the other end of the footrest pipe, the support pipe and the footrest pipe are inserted through, and the tip is A tightening bolt engaged with the clamp member, and a tightening bolt engaged with the other end of the tightening bolt and pressing and clamping the footrest pipe against the inner peripheral surface of the support pipe via the tightening bolt and the clamp member. And an attached knob. According to the footrest mounting structure having the above-described configuration, the footrest pipe can be clamped inside the support pipe, so that there is no risk of pinching a finger or the like when clamping the footrest pipe. Further, the clamp member is inserted into the footrest pipe, and only the tightening knob is exposed on the surface of the support pipe.

[0005] In the footrest mounting structure, the fastening bolt is inserted through a through hole formed in the support pipe and a slit formed in the footrest pipe and opening at the end face of the other end of the footrest pipe. Preferably, the relative rotation between the tightening bolt and the clamp member is restricted, and the tightening knob is screwed into the tightening bolt so as to be relatively rotatable. In this case, when the clamp of the footrest pipe is released, the tightening bolt can be locked in the through hole of the support pipe, and the clamp member is also locked to the support pipe through the tightening bolt. Can be kept. Therefore, the clamp member can be held inside the footrest pipe with the clamp of the footrest pipe released. Further, since the slit of the footrest pipe is opened at the end face of the other end of the footrest pipe, the footrest pipe can be pulled out of the support pipe without any trouble in a state where the clamp is released.

[0006] Preferably, the clamp member is in line contact with two points along the circumferential direction of the inner peripheral surface of the footrest pipe (claim 3). In this case, the clamp member is in contact with the footrest pipe. Can be surely and firmly contacted.

In the footrest mounting structure for a wheelchair according to the third aspect, it is preferable that the clamp member is formed of a cylindrical body having a flat surface on a part of an outer peripheral surface (claim 4). The member can be easily and reliably brought into line contact with two locations along the circumferential direction of the inner peripheral surface of the footrest pipe.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a side view showing a frame portion of a wheelchair to which the present invention is applied, and FIG. 3 is a rear view thereof. The wheelchair is of an electric type in which a driving force corresponding to a pressing force applied to the wheelchair body 1 by a caregiver is applied to a pair of left and right driving wheels 2 as auxiliary power, and the driving wheels 2 are rotationally driven. .

The pair of drive wheels 2 are mounted on both sides of the rear of the wheelchair main body 1 via drive unit units U provided corresponding to the respective drive wheels. In addition, caster wheels 3 are provided on both sides of the front portion of the wheelchair body 1. The wheelchair main body 1 includes a pair of left and right side frames 10 formed by metal pipes. The side frame 10 is erected at a rear portion of the wheelchair main body 1 and has a back pipe 11 on which a backrest seat is stretched, an arm pipe 12 extending forward from the back pipe 11, and substantially horizontal from the back pipe 11 forward. , A caster pipe 14 to which the caster wheel 3 is attached and extending downward from a front end of the seat support pipe 13, and a base pipe 15 having a front end connected to the caster pipe 14. ing.

To the pair of left and right seat support pipes 13, seat pipes 16 for attaching a seat are attached. One end of each seat pipe 16 is rotatably connected to the back pipe 11 via a link 17, and the middle portion is connected to the seat support pipe 1.
3 rotatably received. The wheelchair body 1 is foldable by connecting the pair of left and right side frames 10 by an X-shaped crossbar 10a whose center is rotatably fixed to the center (see FIG. 4). . The crossbar 10a is formed continuously with the front end of each sheet pipe 16. In addition, the rear end side of the seat support pipe 13
The arm pipe 12 is curved and connected to the rear end of the arm pipe 12. The drive unit U is interposed between the lower end of the back pipe 11 and the base pipe 15, and an armrest (elbow support) AL is attached to the upper surface of the arm pipe 12.

Referring also to FIG. 1, a plate-shaped footrest F on which a caregiver's foot rests is projected in front of a pair of left and right caster pipes 14. This footrest F
Is attached to the caster pipe 14 via the footrest pipe 4 and the support pipe 5. The footrest pipe 4 is a main pipe 4 bent in a substantially inverted U-shape.
1 and a reinforcing pipe 42 connecting the legs of the main pipe 41 to each other.
Is attached to one end 4a of the main pipe 41 via a bracket 43 fixed to the one end 4a.

The support pipe 5 is welded to the caster pipe 14 in a state where the axis is directed vertically, and the other end 4 of the footrest pipe 4 is provided inside the support pipe 5.
b is removably inserted through the upper end opening of the support pipe 5. A clamp member 6 is inserted into the other end 4b of the footrest pipe 4 with a gap (see FIG. 1B). The clamp member 6 is formed of a cylindrical body having a flat surface 61 on the front side and the back side of the outer peripheral surface, and a taper guide 62 is formed at the upper end thereof (see FIGS. 6 and 7). ). This taper guide 62
Is to guide the footrest pipe 4 downwardly even when the lower end of the footrest pipe 4 comes into contact with the clamp member 6 when the footrest pipe 4 is inserted into the support pipe 5 so that the footrest pipe 4 can be inserted into a fixed position without any trouble. is there.

The clamp member 6 is formed with a female screw 63 which is open on one flat surface 61 and the other flat surface 61. The female screw 63 is screwed with the tip of a tightening bolt 7. The fastening bolt 7 reaches the clamp member 6 from the outside in the vehicle width direction of the support pipe 5 through the through hole 51 of the support pipe 5 and the slit 44 of the footrest pipe 4. Male screws 71 and 72 are formed in portions exposed to the outside of 5. Further, the tightening bolt 7 has its male screw 71 firmly fastened to the female screw 63 of the clamp member 6, thereby restricting relative rotation with the clamp member 6. The slit 44 of the footrest pipe 4
Is formed along the generatrix of the footrest pipe 4, and its lower end is opened at the lower end surface of the footrest pipe 4 so that the footrest pipe 4 can be inserted and removed without removing the fastening bolt 7. (See FIG. 5).

The male screw 72 of the tightening bolt 7 includes
The tightening knob 8 is screwed so as to be relatively rotatable. The tightening knob 8 presses the clamp member 6 against the inner peripheral surface of the footrest pipe 4 via the tightening bolt 7 by the tightening action, whereby the footrest pipe 4 is connected to the support pipe 5 and the clamp member 6. Between the support pipes 5 to restrict removal. At this time, the clamp member 6 is in line contact with only two places in the circumferential direction of the inner peripheral surface of the footrest pipe 4. That is, in the clamp member 6, the boundary 64 between the outer flat surface 61 and the curved surface is formed by the footrest pipe 4.
(See FIG. 6). Therefore, the clamp member 6 can be brought into strong contact with the inner peripheral surface of the footrest pipe 4, and the footrest pipe 4
Can be securely and firmly clamped. A washer 81 is interposed between the tightening knob 8 and the support pipe 5.

In the footrest mounting structure having the above-described structure, the footrest pipe 4 is clamped inside the support pipe 5, so that there is no possibility that a finger or the like is pinched when the footrest pipe 4 is clamped. Further, since the clamp member 6 is inserted into the footrest pipe 4 and only the tightening knob 8 is exposed on the surface of the support pipe 5, a good appearance can be secured.

When the clamp of the footrest pipe 4 is released, the tightening bolt 7 is inserted into the through hole 5 of the support pipe 5.
1, the clamp member 6 can be held inside the footrest pipe 4. For this reason,
Each time the footrest pipe 4 is attached to the support pipe 5, the trouble of inserting the clamp member 6 into the inside of the footrest pipe 4 becomes unnecessary, and the footrest F can be easily and quickly attached and detached. In addition, the clamp of the footrest pipe 4 can be released only by loosening the tightening knob 8 slightly without removing it from the tightening bolt 7, so that the slit 44 of the footrest pipe 4 is connected to the other end 4b of the footrest pipe 4. In addition to the fact that the footrest pipe 4 is open at the end face, the footrest pipe 4 can be easily and quickly pulled out from the support pipe 5, and the footrest pipe 4 can be easily and quickly attached. Further, since the clamp member 6 has the flat surface 61 formed on a part of the outer periphery of the columnar body, the processing is easy and the contact can be reliably performed.

The flat surface 61 of the clamp member 6
May be provided at least at one position on the outer peripheral surface. Also, the footrest mounting structure of the present invention
Of course, the present invention can be applied to various wheelchairs other than the folding electric wheelchair.

[0018]

As described above, according to the wheelchair footrest mounting structure of the first aspect, the footrest pipe is clamped inside the support pipe.
There is no risk of pinching a finger or the like at the time of the clamp, and safety can be ensured. In addition, since the clamp member is inserted into the footrest pipe and only the tightening knob is exposed on the surface of the support pipe, there is no possibility that the appearance of the wheelchair is impaired.

According to the footrest mounting structure for a wheelchair according to the second aspect, when the clamp of the footrest pipe is released, the clamp member is locked to the support pipe via the tightening bolt and held inside the footrest pipe. Therefore, it is not necessary to insert the clamp member into the footrest pipe every time the footrest pipe is attached or detached. For this reason, the footrest can be easily and quickly attached and detached.

According to the footrest mounting structure for a wheelchair according to the third aspect, since the clamp member is in line contact with two places along the circumferential direction of the inner peripheral surface of the footrest pipe, the clamp member is in contact with the footrest pipe. The clamp member can be brought into strong contact, so that the footrest pipe can be securely and firmly attached to the support pipe.

According to the footrest mounting structure for a wheelchair according to the fourth aspect, since the clamp member is a cylindrical body having a flat surface on a part of the outer peripheral surface, the clamp member is attached to the inner peripheral surface of the footrest pipe. Line contact can be easily and surely made at two locations along the circumferential direction.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a footrest mounting structure of the present invention, wherein a is a side view and b is a cross-sectional view of a main part.

FIG. 2 is a side view showing a frame.

FIG. 3 is a rear view showing a frame.

FIG. 4 is a rear view showing a folded state of the frame.

FIG. 5 is a side view of the footrest pipe.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 1B.

FIG. 7 is a perspective view of a clamp member.

FIG. 8 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheelchair main body 10 Side frame 4 Footrest pipe 4a One end 4b Other end 44 Slit 51 Through hole 6 Clamp member 7 Tightening bolt 8 Tightening knob F Footrest

Claims (4)

[Claims] 1. A support pipe provided at a front portion of a side frame of a wheelchair body, a footrest pipe having one end connected to a footrest and the other end removably inserted into the support pipe. A clamping member inserted into the other end of the clamping bolt, a clamping bolt inserted through the support pipe and the footrest pipe, and a distal end engaged with the clamping member; A footrest mounting structure for a wheelchair, comprising: a fastening knob that is engaged and presses and clamps the footrest pipe against the inner peripheral surface of the support pipe via the fastening bolt and the clamp member. 2. The method according to claim 1, wherein the tightening bolt is inserted through a through hole formed in a support pipe and a slit formed in a footrest pipe and opening at an end face of the other end of the footrest pipe. 2. The wheelchair footrest mounting structure according to claim 1, wherein relative rotation between the tightening bolt and the clamp member is restricted, and the tightening knob is screwed into the tightening bolt so as to be relatively rotatable. 3. The footrest mounting structure for a wheelchair according to claim 1, wherein the clamp member is in line contact with the inner peripheral surface of the footrest pipe at two circumferential positions. 4. The footrest mounting structure for a wheelchair according to claim 1, wherein said clamp member comprises a cylindrical body having a flat surface on a part of an outer peripheral surface.