JPH10181545A - Brake fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a brake freely in a suitable position of a support rod by providing a brake body fitted with a wire for operating a brake shoe, and a holding piece closably provided at the brake body, and holding the support rod removably by the brake body and the holding piece. SOLUTION: A brake fitting device 1 is formed of a brake body 2 for fitting a brake drum, and a holding piece closably provided at the brake body 2. The brake drum is fitted between a brake shoe 8 and the side wall of a plate part 5 of the brake fitting device 1, and a fitting shaft is inserted in a fitting hole 11. A locking protrusion is hooked to an engaging step part 12 of the fitting hole 11, and a tire is rotatably mounted to a frame, thus constituting a brake for braking the tire. The brake body and the holding piece are therefore held by a support rod so as to be able to mount the brake in any position of the support rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a brake mounting device suitable for a wheelchair or the like.

[0002]

2. Description of the Related Art Conventionally, the base ends of large arches and small arches whose distal ends are normally urged away from each other are connected to the lower ends of brake wires, and brake shoes are respectively opposed to the distal ends of the large arches and small arches. And installed
When the brake wire is pulled, the ends of the large arch and the small arch come close to each other, and the brake shoe clamps the tire, and a caliber brake that stops the rotation is proposed as a registered utility model No. 3008043.

Although such a caliber brake has a simple structure, it is mounted on a vehicle body by a single bolt passing through a bolt insertion hole formed in a head pipe, so that not only the brake mounting position is limited. , The mounting part was fragile and unstable.

[0004] A drum brake is known in which a brake shoe is opened and pressed against a brake drum provided integrally with a tire axle to stop the rotation of the tire. Although such a drum brake has a high braking effect and is highly safe, it is usually incorporated in the vehicle body and the mounting position on the brake drum is limited, so that the structure of the brake support portion, for example, the frame structure of a wheelchair changes. Each time, a brake having a different fitting had to be prepared.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a brake mounting device which can easily and firmly mount a brake on a vehicle body and can cope with a change in the structure of a support rod for supporting the brake. And

[0006]

According to the present invention, there is provided a brake mounting device comprising: a brake body to which a part of a brake wire for operating a brake shoe is mounted; The support rod is detachably held by the brake body and the holding piece. By holding the support rod between the brake body and the holding piece, the brake can be freely mounted at an appropriate position on the support rod.

There is a case where an operating portion is provided on the supporting rod, and another portion of the brake wire is attached to the operating portion.
In this way, the structure is simplified since one support rod is provided with the brake and the operation unit for operating and releasing the brake.

[0008] An operation part has a grip attached to a support rod, and one end is pivotally attached to a base end of the grip.
The other end comprises a rotating portion having a brake wire fixed thereto, and an operating rod facing the side edge of the rotating portion and rotatably attached to a base end portion of the grip, wherein the rotating portion includes a brake. The operating rod is urged in the direction opposite to the wire pulling direction, and the operating rod is held in a state where the rotating part is pushed up at one end when its longitudinal axis is substantially orthogonal to the longitudinal axis of the rotating part, A protrusion may be formed on a side edge of the operating rod facing the rotating portion, when the operating rod approaches the grip, which temporarily pushes up the rotating portion.

With this structure, the operating rod can be turned toward the grip, the turning portion can be pushed up by the projection, and the brake wire fixed to the other end can be pulled to operate the brake temporarily. The operating rod is rotated in the opposite direction to make it substantially perpendicular to the grip, and the rotating part is pushed up by one end of the operating rod, and the brake wire fixed to the other end is pulled, and in this state, that is, the state in which the brake is operated Can be held.

[0010]

FIG. 1 shows a brake mounting device 1 for mounting a brake on a vehicle body of a wheelchair. The brake mounting device 1 includes a brake body 2 to which a brake drum 22 (see FIG. 6) is fitted, and a holding piece 4 provided on the brake body 2 so as to be openable and closable.

As shown in FIGS. 2 and 3, the brake body 2 has a dish-shaped portion 5 having a shallow cylindrical shape and an open front surface, a projecting body 6 provided on the back surface of the dish-shaped portion 5, and a projecting body 6. And a holding wall 7 integrally formed on one side surface. Dish 5
As shown in FIG. 1, a pair of substantially semicircular brake shoes 8 are pivotally mounted at one end thereof so as to be openable.
These brake shoes 8 are urged in a contracting direction by a spring 9 mounted along an inner peripheral portion thereof, that is, in a direction away from the side wall of the dish-shaped portion 5.

Further, between the other ends of the brake shoes 8,
The front end of the rotating shaft 10 penetrating the dish-shaped portion 5 and the projecting main body 6 protrudes, and the other end of the brake shoe 8 is
Is pressed into contact with the front end. As shown in FIGS. 4 and 5, the front end of the rotating shaft 10 has a small diameter in one direction of the cross section and a large diameter in the other direction crossing the one direction.
In a normal state, the other end of the brake shoe 8 sandwiches a small-diameter portion as shown in FIG. 4, and when the rotating shaft 10 rotates, a large-diameter portion is placed between the other ends of the brake shoe 8 as shown in FIG. The brake shoe 8 is pushed and spread by the large diameter portion.

Further, a mounting hole 11 is formed through the projecting main body 6 from the center of the dish 5, and an engaging step 12 is formed at the rear end of the mounting hole 11 on the back surface of the projecting main body 6. As shown in FIG. 1, a concave groove 13 having a semicircular cross section is formed on the outer surface of the sandwiching wall 7 in parallel with the bottom surface of the dish-shaped portion 5.
As shown in FIGS. 2 and 3, a brake wire guide portion 14 is formed to protrude at the rear end of the sandwiching wall 7 at the end opposite to the portion where the rotary shaft 10 is inserted.

A holding piece 4 is attached to the outer surface of the holding wall 7 so as to be openable and closable. A concave groove 13 ′ having a semicircular cross section is formed on the inner surface of the holding piece 4. The holding piece 4 is closed, a screw 15 is screwed into the holding wall 7 from the outer surface thereof, and the holding piece 4 is inserted into the side of the brake body 2. When fixed, the concave groove 13 and the concave groove 13 'face each other. The swing arm 3 is arranged on the back surface of the projecting main body 6, and its base end is fixed to the rear end of the rotating shaft 10. A through hole (not shown) is formed at the tip of the swing arm 3, and a cap nut 17 is screwed into the tip of the brake wire fixing tool 16 inserted into the through hole.

The brake mounting device 1 is mounted on a support rod 18 constituting a frame of a wheelchair as follows. As shown in FIG. 1, the support rod 18 is made of a round pipe, and its upper part stands upright. Then, the intermediate portion of the support rod 18 is formed in a concave groove 13 formed on the opposing surface of the holding wall 7 and the holding piece 4.
After fitting to 13 ′, a screw 15 is screwed into the holding wall 7 from the outer surface of the holding piece 4, and the support rod 18 is detachably held between the brake body 2 and the holding piece 4.

A flexible outer tube 19 is inserted into the inside of the support rod 18, and a brake wire 20 is slidably inserted into the outer tube 19, and the lower part of the outer tube 19 and the brake wire 20 is supported. Rod 18
Exposed to the outside. Then, the lower end of the outer tube 19 is fixed to the brake wire guide portion 14 of the brake mounting device 1 via the fixing tool 21. The lower end of the brake wire 20 is connected to the brake wire guide 1.
4 and fixed to a brake wire fixture 16 attached to the tip of the swing arm.

A brake drum 22 as shown in FIG. 6 is fitted to the brake body 2 of the brake mounting device 1. The brake drum 22 is integrally provided on a central inner side surface of the tire 23, and a mounting shaft 24 inserted into the mounting hole 11 of the brake mounting device 1 protrudes rotatably from a central portion thereof. A pair of locking projections 25 are provided on both sides of the outer periphery of the distal end portion of the mounting shaft 24 so as to be able to protrude and retract, respectively. These locking projections 25 are immersed in the mounting shaft 24 by operation from the front side of the tire 23. Is available.

Then, when the brake drum 22 is fitted between the side wall of the dish-shaped portion 5 of the brake mounting device 1 and the brake shoe 8 and the mounting shaft 24 is inserted into the mounting hole 11, the locking projection 25 becomes The tire 23 is rotatably mounted on the frame of the wheelchair by being hooked on the engagement step portion 12 of 11, and a brake for braking the tire 23 is configured. In addition, the tire 23 can be easily pulled out from the brake mounting device 1 and the frame by immersing the locking projection 25 inside the mounting shaft 24.

As described above, the center of the dish-shaped portion 5 of the brake mounting device 1 must coincide with the center of the tire 23, but the holding wall 7 and the holding piece 4 can be moved in any direction, up, down, left, or right. Since the support rod 18 can be held between the two, the brake mounting device 1 can be easily rotated and mounted even if the support rod 18 is bent halfway. Further, the brake main body 2 of the brake mounting device 1 serves as a tire supporting portion for supporting the tire 23, and the brake can be configured simultaneously with the mounting of the tire 23.

As shown in FIG. 1, an operation section 26 for operating the brake wire 20 is provided at the upper end of the support rod 18. As shown in FIG. 7, the operation unit 26 has a grip 27 attached so that a longitudinal axis thereof intersects the direction of the brake wire 20, and is pivotally attached to a base end of the grip 27. It includes a rotating portion 28 that is fixed, and an operating rod 29 that is rotatably provided facing the lower edge of the rotating portion 28, that is, the side edge on the side where the brake wire is disposed. Also, the upper end of the support rod 18 and the grip 2
7, a connecting member 30, which constitutes the base end of the grip 27 and has an open upper and lower surface, is interposed.

One end of a turning portion 28 is pivotally connected to the base end of the grip 27 via a pin 31. The upper end of the turning portion 28 is moved from the upper end of the grip 27 toward the inside of the connecting member 30. Is formed. At the base end of the grip 27, one end of a coil spring 33 is attached below the pin 31. The other end of the coil spring 33 is fixed to a fin 34 protruding from a lower edge of one end of the rotating portion 28, whereby the rotating portion 28 is urged downward, that is, in a direction opposite to the pulling direction of the brake wire 20. ing.

A stopper 35 is provided at the lower edge of the other end of the rotating portion 28 so as to contact the upper end surface of the support rod 18 and regulate the lower limit position of the rotating portion 28. Further, the upper end of the brake wire 20 is fixed to the other end of the rotating portion 28. Further, a substantially triangular projection 36 is formed at the lower edge intermediate portion of the rotating portion 28.

The operating rod 29 is connected to a base 27 of a grip 27 comprising a connecting member 30 via a pivot shaft 37 provided between the projecting portion 36 and an upper end fixing portion of the brake wire 20 below the rotating portion 28. Pivoted to the end. The operating rod 29 projects outside through the open lower surface of the connecting member 30 so that it can rotate between the grip 27 and the supporting rod 18. Further, the rotating part 2 of the operating rod 29
On the upper edge facing the projection 8, a projection 38 abutting on the projection 36 is provided.
Is formed. A tapered portion 39 is formed at one end of the operating rod 29 inserted into the connecting member 30. When the rotating portion 28 is in a normal state, the upper edge of the tapered portion 39 is attached to the lower edge of the rotating portion 28. Abut.

By operating the operating section 26, the brake and brake mounting device 1 operates as follows.
As shown in FIG. 7, the upper edge of the tapered portion 39 of the operating rod 29 abuts on the lower edge of the rotating portion 28, and the projection 38 is
When the rotating part 28 is in contact with the protrusion 36 of the ninth, the rotating part 28 is pulled by the coil spring 33 and is at the lower limit position. As a result, the brake wire 20 connected to the rotating portion 28 is at the lowered position, and the tip of the swing arm 3 to which the lower end of the brake wire 20 is attached also swings downward.

In this state, as shown in FIG. 4, since the small diameter portion of the rotating shaft 10 is interposed between the tips of the brake shoes 8, the brake shoes 8 are narrowed and separated from the inner surface of the side wall of the brake drum 22. . Therefore, the rotation of the brake drum 23 is not suppressed, and the tire 23 can rotate freely.

As shown in FIG. 8, when the operating rod 29 is pulled toward the grip 27, the tip of the projection 38 of the operating rod 29 slides toward the top of the projecting portion 36, whereby the rotating portion 28 is moved by the coil spring 33. Is pushed upward against the urging force of (1), and rotates about the pin 31. As a result, the brake wire 20 fixed to the other end of the rotating part 28 is pulled upward, and the upper edge of the one end of the rotating part 28 is
Stop at the position where it comes into contact with 2.

When the brake wire 2 rises in this way, the tip of the swing arm 3 is pulled and moves upward,
Accordingly, the rotation shaft 10 rotates. Then, as shown in FIG. 5, the large-diameter portion of the rotating shaft 10 is interposed between the tips of the brake shoes 8 to expand the brake shoes 8, and the outer surface thereof is pressed against the inner surface of the side wall of the brake drum 22, and The rotation of the drum 22 and thus the rotation of the tire 23 are restricted.

However, when the operating rod 29 is released, there is no longer any force to push up the rotating part 28, so that the operating rod 29 returns to its original position and the rotating part 28 is supported by the stopper 35 by the urging force of the coil spring 33. It rotates downward until it comes into contact with the upper end surface of the rod 18. Then, the brake wire 20 descends again, and the brake is released.

As shown in FIG. 9, when the operating rod 29 is rotated in the reverse direction to approach the supporting rod 18, the tapered portion 39 gradually rises and pushes up the rotating portion 28, whereby the brake wire 20 is moved. Will be raised. When the longitudinal axis of the operating rod 29 intersects at right angles with the longitudinal axis of the rotating part 28, the upper edge of one end of the rotating part 28 comes into contact with the locking surface 32 and reaches the upper limit position. The brake wire 20 fixed to the other end of the portion 28 is pulled upward as much as possible, and FIG.
As in the state shown in (1), the brake is in a complete braking state.

In this state, the force for rotating the rotating portion 28 downward by the restoring force of the coil spring 33 acts as an axial force on the operating rod 29, and no rotational moment is applied. For this reason, even if the hand is released from the operating rod 29, it does not return to the original position, and the rotating part 28 is pushed up and the brake wire 20 is held in a raised state. Therefore, unless the operation rod 29 is forcibly rotated in the direction of the grip 27, the brake is reliably held in the braking state.

[0031]

According to the first aspect of the present invention, the support rod can be held at any position of the support rod by holding the support rod between the brake body and the holding piece. Even if the rod is bent in various ways, it can be easily attached.Therefore, there is no need to prepare various types of brake mounting devices to cope with changes in the structure of the supporting rod, and the manufacturing cost can be reduced. It is possible.

According to the second aspect of the present invention, the structure is simplified because the brake and the operating portion for operating and releasing the brake are supported by one support rod.

According to the third aspect of the present invention, a simple operation of rotating the same operating rod in the reverse direction causes the brake wire to be temporarily pulled up to operate the brake, thereby releasing the operating rod. At the same time, the brake can be released, or the brake wire can be held in a tensioned state to continuously operate the brake. Moreover,
The brake wire held in tension can be returned to the original position without performing any special operation such as unlocking, so the structure of the device is simplified and the operation is very simple become.

[Brief description of the drawings]

FIG. 1 is a perspective view of a support rod on which a brake mounting device according to an embodiment of the present invention is mounted.

FIG. 2 is a rear view of the brake mounting device.

FIG. 3 is a side view of the brake mounting device.

FIG. 4 is a front view of main parts of a brake shoe and a rotating shaft when a brake is released.

FIG. 5 is a front view of a main part of a brake shoe and a rotating shaft when a brake is operated.

FIG. 6 is a perspective view of a main part of a tire and a brake drum.

FIG. 7 is a sectional view of the operation unit when the brake is released.

FIG. 8 is a sectional view of the operation unit when the brake is temporarily operated.

FIG. 9 is a cross-sectional view of the operation unit when the brake is held in an operating state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brake mounting device 2 Brake main body 3 Oscillating arm 4 Nipping piece 5 Dish-shaped part 6 Projecting main body 7 Nipping wall 8 Brake shoe 9 Spring 10 Rotary shaft 11 Mounting hole 12 Engagement stepped part 13, 13 'Recessed groove 14 Brake wire guide Part 15 Screw 16 Brake wire fixture 17 Cap nut 18 Support rod 19 Outer tube 20 Brake wire 21 Fixture 22 Brake drum 23 Tire 24 Mounting shaft 25 Locking projection 26 Operating part 27 Grip 28 Rotating part 29 Operating rod 30 Connecting member 31 Pin 32 Locking surface 33 Coil spring 34 Fin 35 Stopper 36 Projection 37 Pivot shaft 38 Projection 39 Tapered part

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[Procedure amendment]

[Submission date] February 18, 1997

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Claims (3)

[Claims] 1. A brake body to which a part of a brake wire for operating a brake shoe is attached, and a holding piece provided to be openable and closable on the brake body, wherein a support rod is provided by the brake body and the holding piece. A brake mounting device characterized in that the brake mounting device is detachably held. 2. The brake mounting device according to claim 1, wherein an operation portion is provided on the support rod, and another portion of the brake wire is mounted on the operation portion. 3. The operating part includes a grip attached to a support rod, a pivot part having one end pivotally attached to a base end of the grip and a brake wire fixed to the other end.
An operating rod rotatably attached to a base end of the grip facing the side edge of the rotating portion, wherein the rotating portion is urged in a direction opposite to a brake wire pulling direction, and When the longitudinal axis of the rod is substantially perpendicular to the longitudinal axis of the rotating part, the rod is held in a state where the rotating part is pushed up at one end, and a side edge facing the rotating part of the operating rod. 3. The brake mounting device according to claim 2, wherein a projection is formed to temporarily push up the rotating portion when the operating rod approaches the grip.