JP2004136084A - Drum brake mechanism for wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum brake mechanism for a wheelchair capable of braking and parking even if a care-given person gets on the wheelchair alone by providing a drum brake of the wheelchair with two functions of a braking brake and a parking brake. <P>SOLUTION: In this drum brake mechanism for the wheelchair, the drum brake 17 for braking a main wheel 15 of the wheelchair having main wheels 15 and casters, is operable connected to a first lever by a wire 14 from a brake handle 13 provided side by side with a grip part at the upper end of a rear frame 11, and an operating lever 18 is provided for parking as well as braking the main wheel 15 by the drum brake 17 separately from the wire 14. The drum brake 17 is further provided with a second lever connected to the operating lever 18, and the first lever and the second lever are connected by an engaging member. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a drum brake for braking a main wheel of a wheelchair. More specifically, the present invention relates to a drum brake mechanism that can perform braking and parking at two places, that is, a brake operation of a wheelchair, and a brake handle and an operation lever provided near a wheel.

The wheelchair is provided with a brake handle for a drum brake to apply a brake on a slope or the like when an assisting person grips the grip portion from behind the wheelchair and pushes the wheelchair. This drum brake is usually connected to a brake handle provided alongside a grip portion of a wheelchair for operation by an assistant, and the drum brake is operated by a wire from the brake handle. Further, a tackle brake for directly pressing and fixing a tire of a main wheel is provided near a main wheel as a brake for stopping and fixing a wheelchair when a passenger gets on and off the vehicle. As described above, the drum brake is provided for wheelchair braking. To stop and fix the wheelchair, a tackle brake must be provided, and space must be provided for providing two types of brakes. There was inconvenience. In addition, when the occupant runs in a wheelchair by himself, there is an inconvenience that the brake must be applied by a hand rim in order to apply a brake on a slope or the like.

For example, in Patent Document 1, in the second page paragraph ([0006]), "a cylinder having two drums for an anti-retraction device and a brake, which are integrated together, is attached to each of the left and right wheel portions. The drum is provided with a cam-type ratchet to prevent retraction. Hereinafter, this drum will be referred to as a ratchet drum. " For this purpose, a drum band is wound around the remaining drum and tightened to form a drum brake, which is hereinafter referred to as a brake drum. The handle can be operated with the same handle as the handle that is operated. " It is intended to solve the problem of having to apply a key.

Further, the brake device of Patent Document 2 states that, in the second page paragraph ([0005]), "a pair of left and right wheels provided in a wheelchair can be braked independently of left and right and left and right by operating one of the left and right levers as necessary. It is intended to provide a brake interlocking mechanism capable of simultaneously braking the wheels of the vehicle. " In the fourth line of the paragraph ([0014]), "This allows the user to perform the brake operation with one hand and assist with the other hand, so that not only can the operation of the wheelchair be performed safely, but also It is possible to avoid an unstable state. "

As described above, the drum brake is provided for braking the wheelchair. To stop and fix the wheelchair, the drum brake must be provided with a tackle brake, and a space for providing two types of brakes must be provided. There was an inconvenience of following. In particular, the tackle brake is provided near the main wheel to press and fix the tire of the main wheel, and in order to operate the tackle brake, the assistant must turn forward from behind the wheelchair. There was the inconvenience of having to do it. For this reason, the appearance of a brake that can be braked, stopped, and fixed with one brake has been desired.
JP 2001-327543 A JP-A-2003-093448

An object of the present invention is to provide a drum brake mechanism for a wheelchair, in which a drum brake of a wheelchair has two functions of a braking brake and a parking brake, and can brake and park even when an assisted person is alone in the wheelchair. It is in.

The inventor of the present invention has conducted intensive studies to solve the above-described problems, and as a result, in addition to a method of operating the drum brake with a normal wire to apply braking, one operating lever provided near the main wheel has been used. We succeeded in creating a drum brake mechanism that can park with the brakes and wheels fixed using the drum brake.

Means for solving the problem of the present invention is a drum brake for braking a main wheel of a wheelchair having a main wheel and a caster wheel, the drum brake being connected by a wire from a brake handle attached to a grip portion at an upper end of a rear frame. It is possible to operate by being connected to the first lever, and separately provided from the wire, an operation lever for braking and parking the main wheel by the drum brake is provided, and the second lever connected to the operation lever is provided. A drum brake mechanism for a wheelchair, wherein two levers are provided on the drum brake, and the first lever and the second lever are connected by an engaging member. In addition to the brake handle, an operation lever for braking and parking the main wheel is provided on the drum brake for braking the main wheel by a wire connected to a brake handle provided on a grip portion at the rear of the wheelchair. Brake and parking can be done with the brake.

Another means for solving the problem of the present invention is a drum brake for braking a main wheel of a wheelchair having a main wheel and a caster wheel, the drum brake being provided from a brake handle provided along with a gripping portion at an upper end of a rear frame. It is possible to operate by being connected to the first lever by a wire, and to provide an operation lever for braking and parking the main wheels by the drum brake separately from the wire, and to be connected to the operation lever. A second lever provided on the drum brake, wherein the first lever and the second lever are connected by an engagement member, and an engagement assisting member is suspended between the first lever and the engagement member. It is a drum brake mechanism for a wheelchair. The first lever can perform only braking, and the second lever can be used as a brake for braking and parking.

Another means for solving the problems of the present invention is the drum brake mechanism for a wheelchair according to claim 2, wherein a first lever adjusting screw is screwed to the engagement assisting member. When the brake drum is worn, the screws can be tightened to maintain a constant dominance.

Another means for solving the problems of the present invention is the drum brake mechanism according to claim 1, wherein the operation lever is provided near the main wheel. By providing the operation lever near the main wheel, the wheelchair can be braked by the drum brake without the occupant of the wheelchair using the hand rim.

Another means for solving the problems of the present invention is a wheelchair drum brake mechanism according to claim 1 or 2, wherein the angle of the operation lever of the drum brake can be changed up and down. By making the operation lever of the drum brake changeable in the up-down direction, the height can be adjusted to be easily operated by the occupant of the wheelchair.

Another means for solving the problem of the present invention is the drum brake according to any one of claims 1 to 3, wherein the operation lever of the drum brake can be changed in the front-rear direction of the wheelchair. By making the operation lever of the drum brake changeable in the front-rear direction of the wheelchair, the operation lever can also be mounted facing the rear of the wheelchair so that the caregiver can easily operate the operation lever from behind. Furthermore, it is also possible to use it as a foot brake by mounting it behind the wheelchair and below the wheelchair.

In order to operate the wheelchair drum brake, an operation lever is provided near the wheel, separately from the brake handle provided on the gripping part, and by linking both levers, one wheelchair braking brake and one parking brake Can be summed up. By combining the brakes, the occupant can also apply the brakes, and can apply the braking brakes or apply the parking brakes when he / she is traveling by himself. By mounting the operation lever toward the rear, it is possible for the caregiver to handle the operation lever, or to adjust the operation lever up and down to adjust the position of the operation lever according to the state of the occupant.

The wheelchair to which the drum brake mechanism of the present invention can be mounted can be mounted, whether it is a self-propelled type or an assist type. For example, in the wheelchair shown in FIG. 1, a grip 12 and a brake handle 13 are provided on a rear frame 11, and the brake handle 13 and the drum brake 17 are connected by a wire 14. This is an example in which the brake mechanism 100 of the present invention is attached to the wheelchair, and the operation lever 18 of the drum brake is provided near the side frame 19 of the wheelchair. In FIG. 1, the occupant can easily operate the operation lever 18 by pointing the operation lever 18 forward.

FIG. 2 shows the positional relationship between the wire 14 connected to the brake handle 13 and the operation lever 18 in the brake mechanism 100 of the present invention. The wire 14 from the brake handle 13 of the wheelchair is connected to a first lever 25, and the operation lever 18 is connected to a second lever 26. Thus, the brake handle 13 and the operating lever 18 can operate the same drum brake 17. The operating lever 18 can be used both for braking the wheelchair and for fixing the wheelchair for parking. Therefore, a single brake system has two functions without adding a tackle brake used for fixing a wheelchair and a drum brake used for braking during traveling as in the related art. Further, when the rider runs on his own, it is not necessary for the rider to apply a brake on the hand rim 16 on a slope or the like, and the rider can pull down the operation lever 18 at hand to apply the brake and go down the slope.

FIG. 3 shows an example in which the operation lever 18 of the brake is mounted at a position substantially parallel to the side frame. By removing the bolt and nut of the locking portion 18a of the operation lever 18 and shifting the adjustment hole 18b, the adjustment lever 18 can be made substantially parallel to the side frame 19 or lower than the side frame 19. By adjusting the height of the operation lever 18, the operation lever 18 can be set to an appropriate position where the operation lever 18 can be easily operated according to the occupant.

FIG. 4 shows an example in which the operation lever 18 of the brake is directed to the rear of the wheelchair. By removing the bolts and nuts of the locking portion 18a of the operation lever 18 and fixing the operation lever 18 with bolts and nuts toward the rear of the wheelchair, the operation lever 18 can be mounted toward the rear of the wheelchair. In this way, by turning the brake operating lever 18 toward the rear of the wheelchair, the braking and parking operation lever 18 comes close to the caregiver, so that the caregiver parks from behind without turning in front of the wheelchair. In order to be able to brake.

FIG. 5 is a view showing the brake mechanism 100 of the present invention. The wire 14 passes from the brake handle 13 to a distal end of the first lever 25 through a wire attachment portion 23 provided at the tip of a base plate 22 fixed to the drum brake 17. It is fixed by the fixing part 24. The first lever 25 moves up and down by the wire 14 to apply a brake to the wheelchair. The brake handle 13 connected to the first lever 25 by the wire 14 is intended to be used for applying a brake to a wheelchair, similarly to a conventional drum brake, and can be used for parking a wheelchair. Can not.

(4) The second lever 26 is rotatably attached via the engaging member 27 provided at the tip of the first lever 25. The rotation of the second lever 26 is made possible by rotatably attaching a rotation part 26a at the center of the second lever 26 to the fixed plate 21. The force of the operation lever 18 is transmitted to the first lever 25 via the engaging member 27 about the turning portion 26a, and the wheelchair is braked.

(6) When the second lever 26 is pulled to the end by the operation lever 18, the end portion 26b of the second lever 26 comes into contact with the locking plate 29 as shown in FIG. In this state, the wheelchair is always in the parked state, which cannot be released by the brake handle 13, but can be released by operating the operation lever 18. As described above, the brake mechanism 100 of the present invention has only the brake on the brake handle 13 operated by the caregiver, and the operation lever 18 has both actions of the braking and the parking brake. The brakes can be applied by the user's own braking, and the vehicle can be parked or stopped.

FIGS. 7 and 8 show another example of the drum brake of the present invention, in which the drum brake is connected to the first lever 24 by a wire from a brake handle attached to a grip portion at the upper end of the rear frame and operated. It is possible to provide an operation lever for braking and parking the main wheels by the drum brake separately from the wire, and connect the second lever 26 connected to the operation lever to the drum brake. The first lever 24 and the second lever 26 are connected by an engagement member 27, and an engagement auxiliary member 25a is suspended between the first lever 24 and the engagement member 27. This is a wheelchair drum brake mechanism. By pivoting the engagement assisting member 25a between the first lever 24 and the engagement member 27, the first lever 24 performs only braking of the drum brake, and the second lever 26 performs braking of the drum brake and parking of the wheelchair. Brake lever for

１A first lever adjusting screw 25b is screwed to the engagement assisting member 25a shown in FIGS. The first lever adjustment screw 25b is used to tighten or loosen the first lever adjustment screw 25b when the brake drum is worn or when the brake is to be used more effectively. Can be adjusted.

FIG. 2 is a perspective view of a wheelchair to which a drum brake mechanism is attached. FIG. 3 is a partial front view with a drum brake mechanism attached. FIG. 4 is a partial front view in which the position of an operation lever of the drum brake mechanism is changed up and down. FIG. 5 is a partial front view in which the position of the operation lever of the drum brake mechanism is changed to the rear. FIG. 3 is a partial front view of the drum brake mechanism. FIG. 3 is a partial front view of the drum brake mechanism. FIG. 4 is a partial front view of a drum brake mechanism on which an engagement assisting member is mounted. FIG. 4 is a partial front view of a drum brake mechanism on which an engagement assisting member is mounted.

Explanation of reference numerals

100: drum brake mechanism 11: rear frame 12: handle 13: brake handle 14: wire 15: main wheel 16: hand rim 17: drum brake 18: operation lever 19: side frame 21: fixed plate 22: base plate 23: wire mounting portion 24: wire end fixing portion 25: first lever 25a: engagement assisting member 25b: adjusting screw 26: second lever 26a: spring member 27: engagement member 28: axle 29: locking plate

Claims (6)

A drum brake for braking a main wheel of a wheelchair having a main wheel and a caster wheel, wherein the drum brake is operated by being connected to a first lever by a wire from a brake handle attached to a grip portion at an upper end of a rear frame. Aside from the wire, an operation lever for braking and parking the main wheels by the drum brake is provided, and a second lever connected to the operation lever is provided on the drum brake, A drum brake mechanism for a wheelchair, wherein a first lever and the second lever are connected by an engagement member. A drum brake for braking a main wheel of a wheelchair having a main wheel and a caster wheel, wherein the drum brake is operated by being connected to a first lever by a wire from a brake handle attached to a grip portion at an upper end of a rear frame. Aside from the wire, an operation lever for braking and parking the main wheels by the drum brake is provided, and a second lever connected to the operation lever is provided on the drum brake, A drum brake mechanism for a wheelchair, wherein a first lever and the second lever are connected by an engagement member, and an engagement auxiliary member is suspended between the first lever and the engagement member. The drum brake mechanism for a wheelchair according to claim 2, wherein a first lever adjusting screw is screwed to the engagement assisting member. The drum brake mechanism according to any one of claims 1 to 3, wherein the operation lever is provided near the main wheel. The drum brake mechanism for a wheelchair according to any one of claims 1 to 4, wherein the angle of the operation lever of the drum brake can be changed up and down. The drum brake mechanism according to any one of claims 1 to 5, wherein an operation lever of the drum brake is changeable in a front-rear direction of the wheelchair.

Images