JPH0439834Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Field of Use In the present invention, a support member facing the rim of a wheel is fixed to an actuating member that is interlocked and connected to a brake lever, and the support member The present invention relates to a bicycle brake device in which a slidable block is fixed to the rim.

(2) Prior Art Conventionally, in such bicycle brake devices, the entire block is generally made of hard synthetic resin.

(3) Problems to be solved by the invention However, as mentioned above, if the entire block is made of a hard material, the elastic force of the block is relatively small, and slippage between the rim and the block is likely to occur during brake operation, resulting in difficulty in braking. It is difficult to say that the distance is short enough. Furthermore, if the brake lever is strongly pulled to force the block into contact with the wheel rim in order to shorten the braking distance, the wheel is likely to lock. When the wheels become locked, slippage occurs between the wheels and the road surface, increasing the braking distance, and there is a risk that the vehicle may skid or the vehicle may lose control of the vehicle.

In order to solve this problem, it is conceivable to make the block elastic. However, if the entire block is made of a soft material in order to have elasticity, the sliding surface of the block with the rim will also be soft, resulting in a large amount of wear, which is impractical.

The present invention has been made in view of the above circumstances, and aims to provide a bicycle brake device that exhibits satisfactory braking performance by giving elasticity to the blocks while minimizing the amount of wear. purpose.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above-mentioned object, according to the invention, the block includes a hard part made of a hard material and arranged on the rim side, and a hard part made of a hard material. and an elastic part interposed between the support members.

(2) Effects According to the above structure, since the hard part is in sliding contact with the rim, the amount of wear can be kept relatively small, and the elastic part can provide elastic force to the entire block.

(3) Examples Examples of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention applied to a brake device for the front wheel of a bicycle. FIG. 1 is a front view of the bicycle brake device, and FIG. 2 is a support member and FIG. 3 is an enlarged perspective view of the block.

First, in FIG. 1, a base 2a of a front fork 2 that supports a front wheel W is connected to a head pipe 1 at the front of a bicycle body frame, and a steering handle 3 is supported so as to be steerable. A grip part 4 is provided at one end of the steering handle 3, and a brake lever 6 is attached to the brake lever 6 by a bracket 5 fixed to the steering handle 3 in proximity to the grip part 4.
is supported so as to be rotatable toward and away from the grip portion 4.

A support shaft 7 is fixed to the base 2a of the front fork 2, and first and second actuating members 8, 9 are swingably supported on this support shaft 7 so as to straddle the front wheel W. . first and second actuating members 8,
Each of the actuating members 9 is formed into an arcuate shape, and the base end portions of the actuating members 8 and 9 are swingably supported by the support shaft 7. Further, a spring 10 is interposed between the two operating members 8 and 9, which exerts a spring force in a direction in which the tips of the operating members 8 and 9 move away from the front wheel W.

The first actuating member 8 is integrally provided with a connecting arm portion 8a extending outward from its intermediate portion, and the second actuating member 8 is
The actuating member 9 is integrally provided with a connecting arm 9a extending outward from the base end, the distal end of which is located below the connecting arm 8a.

The first and second actuating members 8 and 9 and the brake lever 6 are interlocked and connected via a brake cable 13 in which an inner cable 12 is movably inserted into an outer cable 11. That is,
One end of the outer cable 11 is connected to the bracket 5, and one end of the inner cable 12 protruding from one end of the outer cable 11 is connected to the brake lever 6.
connected to. Further, an adjuster 14 is connected to the tip of the connecting arm 8a of the first actuating member 8 so as to be movable forward and backward, and the other end of the outer cable 11 is fitted into the adjuster 14. The other end of the inner cable 12 protruding from the other end of the outer cable 11 passes through the adjuster 14 and is connected to the tip of the connecting arm 9a of the second actuating member 9. Therefore, when the brake lever 6 is operated, the inner cable 12 is pulled, the connecting arm 8a is pushed downward, and the connecting arm 9a is pulled upward.
The first and second actuating members 8 and 9 rotate in a direction that brings their tips closer to the front wheel W.

At the tips of the first and second actuating members 8, 9,
Metal supporting members 16, 16 facing the side surfaces of the rim 15 of the front wheel W are fixed in a vertically adjustable manner, and these supporting members 1
Blocks 17 and 17 that can be slidably contacted with the side surfaces of the rim 15 are fixed to the rims 6 and 16, respectively.

Referring also to FIG. 2, the block 17 as a whole is formed of hard synthetic resin into a rectangular parallelepiped shape extending in the circumferential direction of the rim 15. A through hole 18 is bored therebetween. The part of the block 17 on the rim 15 side retains the characteristics of the hard material as a hard part 17a, and the through hole 18 is formed between the hard part 17a and the support member 16, so that it has elastic force. The elastic portion 17b is formed as a curved elastic portion 17b.

Furthermore, in the hard part 17a of the block 17,
A plurality of protrusions 19 that come into sliding contact with the rim 15 are protruded from the surface facing the rim 15 .

Next, the operation of this embodiment will be explained. When the brake lever 6 is operated while the bicycle is running, the first and second actuating members 8, 9 move the blocks 17, 17 at the tips of the actuating members to the rim 15 of the front wheel W. The rim 15 and both blocks 17, 1 rotate in the direction of pressure contact.
Braking force is obtained by the frictional force with 7.

Thus, both blocks 17, 17 have elastic portions 17b.
The blocks 17, 17 have elastic force due to the presence of the rim 15, and both blocks 17, 17 come into elastic sliding contact with both sides of the rim 15. Therefore, even if the operating force of the brake lever 6 is relatively weak, both blocks 17, 17 elastically stick to both sides of the rim 15, and slippage between the rim 15 and both blocks 17, 17 is suppressed as much as possible. , it is possible to exhibit sufficient braking performance and shorten the braking distance.

Further, assuming that the brake lever 6 is strongly pulled, both blocks 17 have elastic force, so even if both blocks 17, 17 are pressed against the rim 15 side, the front wheel W will not be locked. Therefore, it is possible to avoid as much as possible the occurrence of slippage between the road surface and the front wheels W, prevent skidding from occurring or the steering wheel being taken, and prevent the braking distance from increasing.

Moreover, since the parts of both blocks 17, 17 on the rim 15 side are hard parts 17a, 17a, the rim 15
It is possible to minimize wear due to friction with the
Durability without any practical problems can be obtained.

FIG. 3 shows another embodiment of the present invention, and parts corresponding to those in the above embodiment are given the same reference numerals.

The block 17' fixed to the support member 16 consists of a hard part 17'a and an elastic part 17'b interposed between the hard part 17'a and the support member 16. It is formed by joining a hard part 17'a made of resin and an elastic part 17'b made of soft synthetic resin to each other.

Even in this embodiment, the block 17' can be given elastic force by the elastic part 17'b while ensuring sufficient wear resistance by using the hard part 17'a on the rim 15 side, which is different from the embodiment described above. A similar effect can be achieved with Qin.

In addition to the caliper brake device of the type described in the above embodiment, the present invention also provides a support member that faces the rim of the wheel and that is fixed to the actuating member that is interlocked and connected to the brake lever, and that the support member is provided with a support member that faces the rim of the wheel. It is widely applicable to bicycle brake devices to which a slidable block is fixed.

C. Effects of the invention As described above, according to the invention, the block consists of a hard part made of a hard material and arranged on the rim side, and an elastic part interposed between the hard part and the support member. By having a hard part in sliding contact with the rim, it is possible to keep the amount of wear to a relatively small amount and improve durability, and by providing elasticity to the entire block with an elastic part, the rim can have a sufficient amount of block. By closely contacting the wheels, excellent braking performance can be obtained and the wheels can be prevented from locking up.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention; Figure 1 is a front view of a bicycle brake device, Figure 2 is an enlarged perspective view of the support member and block, and Figure 3 is an illustration of the bicycle brake system. FIG. 3 is a perspective view corresponding to FIG. 2 of another embodiment of the invention; 6... Brake lever, 8, 9... Operating member,
15... Rim, 16... Support member, 17, 17'
...Block, 17a, 17'a...Hard part, 1
7b, 17'b...Elastic part, W...Wheel.

Claims (1)

[Scope of utility model registration request] A support member 16 facing the rim 15 of the wheel W is fixed to the actuating members 8 and 9 which are interlocked and connected to the brake lever 6, and the support member 16 has the rim 1
5, the blocks 17, 17' are made of a hard material and have hard parts 17a, 17'a disposed on the rim 15 side.
, the hard parts 17a, 17'a and the support member 1
A bicycle brake device characterized by comprising elastic parts 17b and 17'b interposed between two elastic parts 17b and 17'b.