JP2001294160A - Anti-skidding device for wheel-chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-skidding device for a wheel-chair capable of fixing stably the wheel-chair to a floor face with an own operation by a user of the wheel-chair, so as to make the user of the wheel-chair safely use a moving walk and the like arranged slopedly with a required slope, without an assistant. SOLUTION: This device for fixing the wheel-chair 1 to the floor face 5 is constituted of a vertically expandable link mechanism 4 (expandable mechanism) of which the upper end part is fixed to a base pipe 3 (fixed part) positioned substantially just in a downside of an axle 2 of the wheel-chair 1, and in the lower end part of which a friction plate 6 is provided to generate required frictional force against the floor face 5, an operation lever 8 provided in the vicinity of a seating part of the wheel-chair 1, and a connection rod 17 (interlocking means) provided between the operation lever 8 and the friction plate 6 to change an inclining operation of the lever 8 into an expanding or contracting operation of the link mechanism 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-slip device for a wheelchair.

[0002]

2. Description of the Related Art For example, in a facility such as an airport, a moving walkway of a rubber belt circulation type has conventionally been used, and there is a moving walkway of this kind which is arranged at a required gradient and is inclined. In the case of a non-slip structure such as the formula, an inclined arrangement with a maximum slope of 15 ° is permitted.

[0003]

However, assuming the use of a wheelchair user, if the gradient of the moving sidewalk is close to 15 °, the wheelchair brake alone will stably fix the moving sidewalk on the road surface. It becomes difficult to obtain the condition, the wheelchair wheel slides down while being locked by the brake, the caster (auxiliary wheel) in front of the wheelchair becomes easy to rotate, the wheelchair rotates, May fall backward.

The present invention has been made in view of the above circumstances, and provides a wheelchair non-slip device capable of stably fixing a wheelchair to a floor by a user of the wheelchair. It is an object of the present invention to make it possible for a wheelchair user to use a moving sidewalk or the like inclined at a required gradient without a caretaker.

[0005]

SUMMARY OF THE INVENTION The present invention is a non-slip device for a wheelchair for fixing a wheelchair to a floor,
A vertically extendable telescopic mechanism having an upper end fixed to an appropriate fixed portion located substantially immediately below the axle of the wheelchair and having a lower end provided with a friction plate capable of generating a required frictional force against the floor surface; An operation lever provided in the vicinity of the seating portion of the wheelchair; and an interlocking means provided between the operation lever and the friction plate so as to convert the tilting operation of the operation lever to the expansion and contraction operation of the expansion and contraction mechanism. It is characterized by the following.

Thus, the user of the wheelchair operates the operating lever while sitting on the seat to extend the expansion mechanism via the interlocking means, thereby pressing the friction plate at the lower end of the expansion mechanism against the floor. The wheelchair is firmly fixed to the floor by the frictional force generated by the friction plate against the floor, so that the wheelchair can be stably fixed, for example, when using a moving walkway inclined and arranged at a required gradient. It is possible to obtain the state, and it is possible to avoid the occurrence of troubles such as slipping and rotation of the wheelchair and falling backward.

Further, in the present invention, it is preferable that a lock means for locking the operation lever at an appropriate tilt position is provided. In this case, the expansion and contraction mechanism is extended to press the friction plate against the floor surface. The operation lever can be locked in the operated state, or the operation lever can be locked in a stored state in which the friction plate is separated from the floor surface by shortening the expansion and contraction mechanism.

The telescopic mechanism used in the present invention can be constituted by, for example, a link mechanism that bends and expands in the vertical direction. The telescopic mechanism includes an elastic body that urges such a telescopic mechanism in the direction in which the telescopic mechanism extends. It is also possible to provide an elastic body that urges the expansion mechanism in a direction to shorten it.

Here, when the elastic mechanism is provided with a resilient body which urges the elastic mechanism in the extending direction, the elastic mechanism can be automatically operated by the elastic force of the elastic body. If you have an elastic body that urges in the direction to shorten
The elastic mechanism can be automatically stored by the elasticity of the elastic body.

[0010] The operating lever used in the present invention is preferably configured so that it can be operated also by a rear caregiver. In this case, the caretaker pushing the wheelchair rearward operates the operation lever to lift the wheelchair. It can be fixed to the floor.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention. As shown in FIG. 1 when the wheelchair 1 is viewed from the side, in this embodiment, the axle 2 of the wheelchair 1 is substantially omitted. The upper end of a vertically extendable link mechanism 4 (extendable mechanism) is fixed to the left and right base pipes 3 (fixed portions) located immediately below, and a floor 5 is attached to the lower end of the link mechanism 4.
A friction plate 6 capable of generating a required frictional force is provided, and an operation lever 8 for operating the extension and contraction operation of the link mechanism 4 is provided near the seating portion of the wheelchair 1. .

As shown in detail in FIG. 2, the link mechanism 4 has a structure in which an upper ceiling plate 9 and a lower friction plate 6 are connected by a pair of front and rear links 10. In particular, in the illustrated example, the bending fulcrums of the links 10 are connected to each other by a tension spring 11 (elastic body). 10 can be pulled in the upright direction to urge the link mechanism 4 in the extending direction.

On the other hand, the operation lever 8 is provided on the bracket 1 mounted on the lower side surface of the left and right back seat frames 12.
3 extend in the front-rear direction while being pivotally attached to the swinging shaft 14 via a swing shaft 14, the front end of which is a grip 15 for a user of the wheelchair 1, and the rear thereof. The side end serves as a grip 16 for an attendant pushing the wheelchair 1 behind.

The position of the operation lever 8 slightly shifted forward from the swing shaft 14 and the position of the link mechanism 4
The pin is connected to the center position of the upper surface of the friction plate 6 by a connecting rod 17 (interlocking means) extending in the vertical direction, and as shown in FIG. Thus, the friction plate 6 is pulled up via the connecting rod 17, and the link mechanism 4 can be stored in a folded state against the elasticity of the tension spring 11 in a lower part of the wheelchair.

Further, as shown in FIGS. 4 and 5, a bracket 13 pivotally supporting the operation lever 8 is provided with a swing shaft 1
A hook 18 (lock means) having a hook shape is formed downward at a position slightly rearward from the position 4.
The tilting position of the operation lever 8 is locked by passing the side of the stopper 18 and lowering the rear portion of the operation lever 8 once below the stopper 18 and then hooking the stopper 18 from below. Thus, the link mechanism 4 can be held in the housed state.

That is, as shown in a plan view in FIG. 6, the pivotal support structure of the operation lever 8 with respect to the swing shaft 14 is provided with a play enough to swing the operation lever 8 slightly right and left.
By utilizing this play, the tilting trajectory of the operation lever 8 is slightly shifted left and right, so that the operation lever 8 can be hooked on the stopper 18 or released.

The connecting rod 17 is connected to the link mechanism 4
A slit 19 opened at the center of the top plate is inserted therethrough, and the horizontal movement range of the connecting rod 17 is limited by the slit 19, so that the horizontal direction between the top plate 9 and the friction plate 6 is reduced. Is suppressed, and the normal bending and stretching operation of the link mechanism 4 is maintained.

The link mechanism 4 is normally housed in the lower part of the wheelchair 1 in a state as shown in FIG. 3, and when the wheelchair 1 needs to be fixed to the floor 5, the wheelchair 1
When the user operates the operation lever 8 while sitting on the seating portion 7 and releases the lock by releasing the operation lever 8 from the stopper 18, as shown in FIG. The front and rear links 10 are pulled in the upright direction by the force, and the link mechanism 4 is automatically extended, whereby the friction plate 6 is pressed against the floor surface 5 by the elastic force of the tension spring 11 and the friction plate 6 is placed on the floor. Since the wheelchair 1 is firmly fixed to the floor 5 by the frictional force generated on the surface 5, a stable fixed state of the wheelchair 1 is obtained, for example, when using a moving sidewalk inclined and arranged at a required gradient. This makes it possible to prevent problems such as the wheelchair 1 from slipping and rotating, falling backward, and the like.

When it is no longer necessary to fix the wheelchair 1 to the floor 5, the user of the wheelchair 1 grasps the grip 15 in front of the operating lever 8 while sitting on the seating portion 7 and pulls up. As a result, the friction plate 6 is pulled up via the connecting rod 17 and the link mechanism 4 is stored under the wheelchair 1 in a folded state against the elastic resilience of the tension spring 11, and the rear portion of the operation lever 8 behind the swing shaft 14 is moved. The state shown in FIG. 3 may be returned by locking the stopper 18 and locking it.

Therefore, according to the above-described embodiment, the wheelchair 1 can be stably fixed to the floor surface 5 by the user of the wheelchair 1 himself. It is possible for the user of the wheelchair 1 to use the wheelchair without any assistance.

Further, in this embodiment, in particular, the link mechanism 4 can be held in the housed state by locking the portion of the operating lever 8 behind the swing shaft 14 with the stopper 18 so as to be locked. Stopper 18 for operating lever 8
The link mechanism 4 can be automatically operated by the resilience of the tension spring 11 only by releasing the lock on the wheelchair, so that the operability of the wheelchair 1 by the user of the wheelchair 1 can be greatly improved.

Further, the operation lever 8 in this embodiment is
The rear end is a gripping portion 16 for a caretaker pushing the wheelchair 1 behind, and when the caretaker accompanies the back, the caretaker operates the operation lever 8 to operate the wheelchair 1.
Can be fixed to the floor 5, so that there is an advantage that the user sitting on the wheelchair 1 does not have to bother.

FIGS. 7 to 10 show another embodiment of the present invention. In the embodiment shown here, the tension spring 11 in the embodiment shown in FIGS. Instead, the link mechanism 4 can be automatically stored by the elastic force of the compression spring 20, so that the lock of the operation lever 8 is performed in an operating state in which the link mechanism 4 is extended and set. It is.

That is, as shown in FIGS. 9 and 10, a bracket 13 pivotally supporting the operation lever 8 in this embodiment.
A stopper 18 (lock means) having a hook shape is formed upward at a position slightly behind the swing shaft 14, and is passed through the side of the stopper 18 so as to pass through the operation lever 8. By raising the rear portion of the control lever 18 once to the top of the stopper 18 and then hooking the stopper 18 from above, the tilting position of the operation lever 8 can be locked and the link mechanism 4 can be maintained in the operating state. It is.

As shown in FIG. 8, the link mechanism 4 is stored in the lower part of the wheelchair 1 by a resilient force of the compression spring 20 in a free state in which the operation lever 8 is not locked.
When it is necessary to fix the wheelchair 1 to the floor 5, the user of the wheelchair 1 holds the grip 15 on the front side of the operation lever 8 while sitting on the seating portion 7 and pushes down, thereby causing friction via the connecting rod 17. When the plate 6 is pushed down to lock the portion of the operation lever 8 behind the swing shaft 14 with the stopper 18, as shown in FIG. Stand up and link mechanism 4
Is extended, whereby the friction plate 6 is pressed against the floor surface 5 and the wheelchair 1 is firmly fixed to the floor surface 5 by the friction force generated by the friction plate 6 against the floor surface 5. In the case of using a moving sidewalk inclined and arranged on a slope, for example, it is possible to obtain a stable fixed state of the wheelchair 1, thereby avoiding the occurrence of problems such as the wheelchair 1 sliding down, rotating, falling backward, etc. Is done.

When the wheelchair 1 does not need to be fixed to the floor surface 5, the user of the wheelchair 1 operates the operation lever 8 while sitting on the seating portion 7, and the operation lever 8 is stopped by the stopper 18. When the lock is released by releasing the link, the front and rear links 10 are pushed and separated in the refracting direction by the elastic resilience of the compression spring 20 to expand as shown in FIG. 8, and the link mechanism 4 is automatically shortened. Link mechanism 4 is compression spring 2
It is automatically folded and stored in the lower part of the wheelchair 1 by the elastic force of 0.

In this way, the link mechanism 4 can be maintained in the operating state by locking the portion of the operating lever 8 behind the swing shaft 14 by the catch 18 and locking the operating lever 8. By simply releasing the lock on the stopper 18, the link mechanism 4 can be automatically stored by the elasticity of the compression spring 20, so that the operability of the wheelchair 1 by the user of the wheelchair 1 is greatly improved. be able to.

Further, in each of the embodiments described above, in each case, the front and rear links 10 forming the link mechanism 4 are bent outward in the front-rear direction. However, as shown in FIGS. It is also possible to configure so that the front and rear links 10 forming the mechanism 4 bend inward in the front and rear direction,
In this case, if the tension spring 11 is employed as the elastic body, the automatic storage type is obtained, and if the compression spring 20 is employed as the elastic body, the automatic operation type is achieved.

In any of the link mechanisms 4 described above, the link mechanism 4 is extended to move the friction plate 6 to the floor surface 5.
It is possible to set the front and rear links 10 to be in an upright state when the operation state is brought into pressure contact with, but in order to bend the front and rear links 10 in the intended direction surely at the time of storage, It is preferable to set the operation state in a state where a slight bending in the direction to be bent at the time of storage is left.

Further, the anti-slip device of the present invention comprises a tension spring 1
It is also possible to configure without a resilient body such as a compression spring 20 or a compression spring 20. For example, when fixing to the floor surface 5 of the wheelchair 1 is necessary, the grip 15 on the front side of the operation lever 8 is required.
The friction plate 6 is held down by pressing the
It is also possible to use a completely manual type in which the operating state of being pressed against is maintained.

The wheelchair anti-slip device according to the present invention is not limited to the above-described embodiment, but stops in the middle of a sloping road except when a moving sidewalk inclined at a required gradient is used. It can also be used when using a vehicle such as a train or a train.The telescopic mechanism may be not only a link mechanism but also a bellows mechanism or a telescopic mechanism. It goes without saying that various changes can be made in.

[0033]

According to the anti-slip device for a wheelchair of the present invention described above, the following various excellent effects can be obtained.

(I) Since the wheelchair user can stably fix the wheelchair to the floor by his / her own operation, for example, the wheelchair user can move the sidewalk inclined at a required gradient. It is possible to use it safely without it.

(II) If a structure having a lock means for locking the operation lever at an appropriate tilt position is adopted, the operating state in which the expansion and contraction mechanism is extended and the friction plate is pressed against the floor surface is controlled by the operation lever lock. The storage state in which the friction plate is separated from the floor surface by shortening the expansion / contraction mechanism by holding the expansion / contraction mechanism can be held by locking the operation lever.

(III) By adopting a structure provided with a resilient member for urging the expansion mechanism in the direction in which the elastic member extends, the elastic member can be released simply by releasing the lock means and setting the operating lever to the free state. The elastic mechanism can be automatically operated by the repelling force, and the operability can be greatly improved.

(IV) If a structure provided with a resilient member that urges the expansion mechanism in the direction in which the elastic member is extended is adopted, the elastic member can be released simply by releasing the lock means and setting the operating lever to the free state. The elastic mechanism can be automatically stored by the elasticity, and the operability can be greatly improved.

(V) If the operation lever is configured to be operated also by a rear caregiver, when the caretaker pushing the wheelchair is traveling backward, the caretaker operates the operation lever to move the wheelchair. Since it can be fixed to the floor, there is no need to bother the user sitting in the wheelchair.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part showing details of a non-slip device mounted on the wheelchair of FIG. 1;

FIG. 3 is an operation explanatory view showing a state in which the link mechanism of FIG. 2 is stored in a lower part of a wheelchair.

FIG. 4 is an enlarged side view showing details of the bracket of FIG. 2;

FIG. 5 is a view in the direction of arrows VV in FIG. 4;

FIG. 6 is a plan view showing details of a pivot structure of an operation lever with respect to swinging.

FIG. 7 is an enlarged view of a main part showing another embodiment of the present invention.

8 is an operation explanatory view showing a state in which the link mechanism of FIG. 7 is stored in a lower part of a wheelchair.

FIG. 9 is an enlarged side view showing details of the bracket of FIG. 8;

FIG. 10 is a view as seen in the direction of arrows XX in FIG. 9;

FIG. 11 is an enlarged view of a main part showing a modification of the link mechanism.

12 is an operation explanatory view showing a state in which the link mechanism of FIG. 11 is stored in a lower part of a wheelchair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Axle 3 Base pipe (fixed part) 4 Link mechanism (expansion / contraction mechanism) 5 Floor surface 6 Friction plate 7 Seating part 8 Operation lever 11 Tension spring (elastic body) 17 Connecting rod (interlocking means) 18 Stopper (lock) Means) 20 compression spring (elastic body)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shinichi Saruyama 6-4 Akashi-cho, Chuo-ku, Tokyo Ishikawajima Transport Machinery Co., Ltd. F-term (reference) 3D050 AA04 DD01 DD03 EE08 EE15 HH02 JJ05 JJ07 KK07

Claims (6)

[Claims] An anti-slip device for a wheelchair for fixing a wheelchair to a floor surface, wherein an upper end portion is fixed to an appropriate fixing portion located substantially directly below an axle of the wheelchair, and a floor surface is fixed to a lower end portion. A vertically extendable telescopic mechanism equipped with a friction plate capable of generating a required frictional force, an operation lever provided in the vicinity of a seating portion of a wheelchair, and a telescopic operation of the telescopic mechanism by tilting the operation lever. An interlocking means provided between the operation lever and the friction plate so as to be able to convert to a non-slip state. 2. The wheelchair anti-skid device according to claim 1, further comprising a lock means for locking the operation lever at an appropriate tilt position. 3. The non-slip device for a wheelchair according to claim 1, wherein the extension mechanism is constituted by a link mechanism that bends and expands in a vertical direction. 4. The wheelchair anti-slip device according to claim 1, further comprising an elastic body for urging the expansion mechanism in a direction in which the expansion mechanism extends. 5. The non-slip device for a wheelchair according to claim 1, further comprising an elastic body for urging the expansion mechanism in a direction to shorten the expansion mechanism. 6. The non-slip device for a wheelchair according to claim 1, wherein the operation lever is configured to be operated by a rear caretaker.