JPH0744555Y2 - Bicycle brake shoe mounting adjustment cover - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a bicycle brake shoe mounting and adjusting cover, and more particularly to a brake shoe mounting and adjusting cover capable of positioning and adjusting a braking surface of a brake shoe with a predetermined inclination with respect to a rim surface.

[Prior art]

Generally, a caliper brake is, as shown in FIG. 7, a pair of brake arms that are opposed to each other with a rim 1 of a wheel sandwiched therebetween, and are pulled in both directions by pulling a brake wire 2 to squeeze the rim 1 from both sides. Brake shoes 4, 4 are attached to the tip ends of the brake arms 3, 3 so as to face the side surface of the rim 1. The brake shoes 4, 4 include holders 5, 5 having means for attaching to the brake arms 3, 3 and rubber blocks 6, 6 whose bases are fitted and held by the holders 5, 5.
Conventionally, the brake shoes 4, 4 are mounted so that the braking surface 6a of the block 6 is parallel to the rim 1 of the wheel, as shown in FIG. However, in this way, the brake shoe 4 is mounted on the braking surface 6a.
When mounted in parallel with the rim 1, when a braking operation is performed to bring the braking surface 6a into contact with the rim 1 and apply a pressing force,
As shown in Fig. 9, the brake shoes react with the braking reaction force.
4, 4 and the brake arms 3, 3 are dragged in the moving direction of the rim 1 (direction of arrow P), and as shown by phantom lines, the brake shoes 4, 4 and the brake arms 3, 3 are moved in the moving direction of the rim 1. Deflection occurs. Therefore, a phenomenon occurs in which the end of the braking surface 6a on the traveling direction side of the rim 1 floats from the surface of the rim 1, while the end of the braking surface 6a opposite to the traveling direction of the rim 1 strongly presses the surface of the rim 1. The non-uniform contact of the brake shoes 4, 4 with the rim 1 not only makes the braking force unstable, but also causes noise and unpleasant vibration when the brake is operated, and causes the braking surface 6a to move quickly. It causes the problem of uneven wear. In order to solve the above problem, the mounting structure of the brake shoes 4,4 to the brake arms 3,3 is improved so that it is formed between the surface of the rim 1 and the braking surface 6a of the block 6 as shown in FIG. The above-mentioned brake shoes 4, 4
Brake arms have been developed that can be mounted with a tilt. In the improved brake arm, the bending of the brake arms 3,3 and the brake shoes 4,4 during braking operation is canceled by the inclination of the brake shoes 4,4, and the brake shoes 4,4 with respect to the rim 1. Since they can be brought into contact with each other almost uniformly, a stable braking effect can be obtained. Further, as the input of the brake lever is increased, the contact area between the braking surface 6a and the rim 1 is increased, which has the effect of facilitating speed control.

[Problems to be solved by the device]

By the way, in the above-described improved brake arm, the brake shoes 4, 4 are configured so that they can be adjusted in any direction and any position so as to be able to cope with various types of bicycles. ing. Therefore, when the brake shoes 4, 4 are attached to the brake arms 3, 3 with the braking surface 6a of the block 6 inclined with respect to the surface of the rim 1, the positioning adjustment of the brake shoes 4, 4 is performed. There must be. However, the work of attaching the braking surface 6a of the block 6 to the surface of the rim 1 at the optimum angle is performed by the brake shoes 4,
Since the gap between the braking surface 6a of 4 and the rim 1 is small, and the inclination between the braking surface 6a and the rim 1 is also very small, it is a very skilled work. Further, a considerable amount of time for attachment and adjustment is required, which causes a problem of lowering work efficiency. Moreover, it is difficult for a general user or a dealer to correctly adjust the mounting angle, and if the brake shoes are not mounted correctly, the braking performance of the brake may be deteriorated and vibration may occur. There is also. In addition, during the process of shipping and transporting the brake shoe, or when installing and adjusting the brake shoe, the braking surface
There is a risk that the 6a may be damaged or that oil, etc. may adhere to it and reduce braking performance. In particular, as described above, the risk increases when a general user installs the brake shoe. However, the conventional brake shoe does not take any measures to protect the braking surface 6a of the brake shoe, and the brake shoe must be attached with great care. Therefore, the replacement of the brake shoes becomes more troublesome, and the vehicle often travels in a state where the braking performance is deteriorated without replacing the brake shoes. The invention of the present application was conceived under the above-mentioned circumstances, solves the above-mentioned conventional problems, and anyone can easily adjust the attachment of the brake shoe, and the braking surface of the brake shoe can be easily adjusted. It is an object of the present invention to provide a bicycle brake shoe attachment adjustment cover that can protect the brake shoe until the attachment is completed.

[Means for Solving the Problems]

In order to solve the above problems, the present invention takes the following technical means. That is, the present invention has a cover bottom portion having an inner surface that abuts on the braking surface of the brake shoe and an outer surface that abuts on the rim surface, and is capable of positioning and adjusting the braking surface on the rim surface with a predetermined inclination, and the cover bottom portion. And a side wall portion that is formed to extend from the peripheral edge of the brake shoe and that can be detachably engaged with the side portion of the brake shoe.

[Function and effect of device]

According to the present invention, the brake shoe can be attached to the brake shoe at the shipping stage to protect the braking surface of the brake shoe until the attachment to the brake arm is completed, and when the brake shoe is attached to the brake arm, Provided is a brake shoe attachment adjusting cover that can attach a braking surface to a rim surface with a predetermined gap and a predetermined inclination. The mounting adjustment cover according to the present invention includes a cover bottom portion having an inner surface that contacts the braking surface of the brake shoe and an outer surface that contacts the rim surface, and the cover bottom portion is sandwiched between the braking surface of the brake shoe and the rim surface. In the
A predetermined gap is formed between the braking surface and the surface of the rim, and is formed so as to have a predetermined inclination. The bottom of the cover is formed so that the gap is reduced toward the traveling direction of the rim by changing the thickness of the cover, and the braking reaction force applied by the brake operation causes the brake arm and the brake shoe. The inclination is set so as to cancel the flexure that occurs in the. On the other hand, a side wall portion that can be detachably engaged with a side portion of the brake shoe is formed on the peripheral edge of the cover bottom portion, and the brake is performed with the inner surface of the cover bottom portion being in contact with the braking surface of the brake shoe. It is formed so that it can be attached to the shoe. With the above structure, the brake shoe is held by the brake arm with the attachment adjustment cover still attached, the outer surface of the cover bottom is adjusted to be in contact with the rim, and fixed to the brake arm, and the attachment adjustment cover is removed. With this alone, an optimum gap can be formed between the braking surface of the brake shoe and the surface of the rim, and an optimum inclination can be provided. For this reason, almost no adjustment time is required, and the workability of the brake shoe assembling process in the maker factory can be dramatically improved. further,
Even when a general user replaces the brake shoe, the brake shoe can be installed and adjusted very easily. Further, the attachment adjusting cover according to the present invention is provided with a side wall portion extending to the peripheral edge of the cover bottom portion and detachably engageable with the side portion of the brake shoe. For this reason, if the above installation adjustment cover is installed at the stage of shipping the brake shoes,
It is not necessary to remove the brake shoe until the installation and adjustment of the brake shoe is completed, and it is possible to prevent the braking surface of the brake shoe from being damaged and to prevent oil and the like from adhering to it, and to maximize the braking performance. Also, since the mounting adjustment cover is removably attached to the brake shoe, even if the braking surface wears at a later date and the gap with the rim or the inclination deviates, the inner surface of the mounting adjustment cover should be attached to the brake shoe. It is possible to readjust the gap and inclination between the braking surface and the rim by bringing the braking surface into contact with the braking shoe and reattaching it to the brake shoe so that the outer surface thereof contacts the rim. Therefore, even when the braking surface is worn and the braking performance is deteriorated, the user can easily adjust the braking device. Furthermore, because the gap between the braking surface of the brake shoes located on both sides of the rim and the rim surface can be set very easily,
The adjustment of the brake wire is easy, and the work of installing the brake shoe is much easier than before. As described above, with the mounting adjustment cover of the present invention,
Not only can the brake shoes be installed in the optimum condition, but the brake device can also be maintained in the optimum condition, maximizing the performance of the brakes, greatly improving the safety of cycling. be able to.

[Explanation of Examples]

An embodiment of the present invention will be specifically described below with reference to FIGS. 1 to 6. The same members as those in the conventional example are designated by the same reference numerals. FIG. 1 is a partial cross-sectional view showing a state in which a brake shoe 4 having a brake shoe attachment adjusting cover 7 according to the present invention is brought into contact with the surface of the rim 1. Further, FIG. 2 is a plan view of the brake shoe attachment adjusting cover of FIG. 1, FIG. 3 is a front view of the same, and FIG. 4 is a side view of the rim advancing direction side. As shown in these drawings, the brake shoe attachment adjusting cover 7 of this embodiment includes a cover bottom portion 10 having an inner surface 8 that abuts the braking surface 6a of the brake shoe 4 and an outer surface 9 that abuts the surface of the rim 1, A side wall portion 11 extending from the peripheral edge of the cover bottom portion 10 and detachably engageable with the side portion of the brake shoe 4 is provided. As shown in FIG. 2, the cover bottom portion 10 is formed in an elliptical shape in plan view substantially corresponding to the braking surface 6a of the block 6, and its thickness is in the traveling direction of the rim 1 (direction of arrow P). ) Is formed so as to decrease toward. Therefore, as shown in FIG. 1, when the cover bottom portion 10 is sandwiched between the braking surface 6a of the block 6 and the surface of the rim 1, a predetermined gap is provided between the braking surface 6a and the surface of the rim 1. And the braking surface 6a can be positioned with a predetermined inclination with respect to the rim surface. On the other hand, on the periphery of the cover bottom portion 10, the side surface of the block 6
A side wall 11 is formed so as to surround 6b, and the side wall 11
A notch 12 for attachment / detachment is formed at the end of the rim 1 in the traveling direction. Further, the side portions of the side wall portion 11 are slightly bent inward to form engagement edges 13 that can engage with both side surfaces 6b of the brake shoe 4, and the cutout portion 12 is formed.
A pair of engaging pieces 14 that elastically abut the longitudinal ends of the blocks 6 to prevent the brake shoe attachment adjustment cover 7 from falling off are also formed on both sides of the. When the brake shoe attachment adjusting cover 7 is inserted into the brake shoe 4 through the notch 12, the engaging edge 13 engages with the side surface 6b of the brake shoe 4 and the braking surface 6a of the block 6 covers the bottom portion 10 of the cover. The brake shoe mounting adjustment cover 7 is attached to the brake shoe 4 by contacting the inner surface 8 of the brake shoe 4 and elastically contacting the engaging piece 14 with the longitudinal end portion of the brake shoe 4. Since the engagement piece 14 elastically contacts the longitudinal end portion of the brake shoe 4, when the brake shoe attachment adjustment cover 7 is displaced in the direction opposite to the mounting direction, the engagement piece 14 will be removed. The brake shoe mounting adjustment cover 7 can be easily removed from the boot shoe 4 by expanding. Next, a method of attaching the brake shoe attachment adjusting cover 7 of the present embodiment to the brake arm of the brake shoe 4 will be described. The brake shoe attachment adjusting cover 7 of the present invention is attached to the brake shoe 4 at the time of factory shipment in order to protect the brake block 6, and is attached to the brake arm in the state shown in FIGS. 2 to 4. . In order to attach the brake shoe 4 to the brake arm, as shown in FIG. 1, the cover bottom portion 10 having the smaller thickness is arranged in the traveling direction of the rim (direction of arrow P), and the outer surface 9 of the cover bottom portion 10 is attached to the rim. The mounting bar 5b of the brake shoe 4 is fixed to the brake arm while being brought into contact with the surface of 1. Then, the brake shoe mounting cover 7 is removed from the brake shoe 4 so as to be displaced in a direction opposite to the traveling direction of the rim 1 (direction of arrow P). Since the notch 12 for attachment / detachment is formed at the end of the brake shoe attachment / adjustment cover 7 on the rim advancing direction side, the brake shoe attachment / adjustment cover 7 can be easily removed from the brake shoe 4. When the brake shoe attachment adjusting cover 7 is removed, a gap 15 having a predetermined inclination is formed between the braking surface 6a of the block 6 and the surface of the rim 1 in accordance with the thickness of the cover bottom portion 10. . With the brake shoe attachment adjusting cover 7, the gap 15 between the braking surface 6a and the surface of the rim 1 can be accurately adjusted, and the braking surface 6a has an optimum inclination with respect to the surface of the rim 1. Can be made to face each other. Therefore, the flexure of the brake arm and the brake shoe 4 due to the braking reaction force during braking can be offset to prevent an unpleasant noise and vibration during braking, and the brake shoe can be brought to its maximum performance. 4 can be mounted and adjusted. Moreover, as described above, the mounting work of the brake shoe 4 is extremely easy, and the adjustment time is hardly required. Therefore, the workability of the assembling process in the factory can be remarkably improved.
Even when a general user replaces the brake shoe 4 by himself / herself, it becomes possible to attach the brake shoe 4 to the brake arm in an optimum state as described above. Further, the brake shoe attachment adjustment cover 7 in the present invention is attached at the shipping stage of the brake shoe 4 and does not need to be removed until the attachment adjustment of the brake shoe 4 to the brake arm is completed.
It is possible to provide the brake shoe 4 which can prevent the braking surface 6a of the vehicle from being damaged and prevent oil or the like from adhering to the braking surface 6a and can maximize the braking performance. Further, the brake shoe attachment adjustment cover 7 is detachably attached to the brake shoe 4. Therefore, even if the braking surface 6a is worn out later and the gap 15 and the inclination of the brake shoe 4 with respect to the rim 1 are changed,
The brake shoe attachment adjustment cover 7 is attached to the inner surface 8 thereof.
Again so that it contacts the braking surface 6a of the block 6,
By re-fixing the outer surface 8 to the rim 1 so as to abut the rim 1, it becomes possible to easily readjust the gap and inclination between the braking surface 6a and the rim 1.
That is, even if the braking surface 6a is worn, the brake can be easily adjusted. In addition, since the gap 15 between the braking surface 6a of the brake shoes located on both sides of the rim 1 and the surface of the rim 1 can be set very easily, the adjustment of the brake wire is easy and the installation work of the brake shoe can be performed conventionally. It is much easier than that. In particular, the effect is remarkable in a cantilever type caliper brake using an arch wire or a center pull type caliper brake. As described above, the brake shoe attachment adjustment cover 7 according to the present invention allows not only the brake shoe to be attached in an optimal state but also the brake to be kept in an optimal state, which greatly improves the safety of cycling. Can be improved. 5 and 6 show another embodiment of the present invention. In the embodiment shown in this figure, the outer surface 9 of the cover bottom 10 is
, A pair of ridges 16a, 16 extending in the direction perpendicular to the longitudinal direction.
b is formed with a predetermined distance. Each ridge 16a, 1
Brake shoe 4 with 6b in contact with the surface of rim 1
By fixing to the brake arm, it becomes possible to position and fix the braking surface 6a of the block 6 with the optimum clearance 15 and the optimum inclination with respect to the surface of the rim 1. The scope of the present invention is not limited to the above embodiments. In the present embodiment, the present invention is applied to a caliper brake at the time of side pulling, but it goes without saying that the present invention can be applied to a bicycle caliper brake such as a center-pull caliper brake or a cantilever caliper brake. Further, in this embodiment, the side wall portion 11 is formed on the periphery of the cover bottom portion 10 so as to surround the block 6, but the side wall portion may be formed on a part of both side portions of the brake shoe 4. Further, in the present embodiment, the thickness of the cover lower portion 10 is formed so as to decrease in the advancing direction of the rim 1, but conversely it may be formed so as to increase in the advancing direction of the rim 1. . Further, in the present embodiment, the engaging edge 13 is formed on the end edge of the side wall portion 11 so that the side wall portion 11 is mounted on the brake shoe 4. However, the side wall portion alone can be mounted on the brake shoe. Further, in the present embodiment, the notch 12 is formed on the side of the rim 1 in the direction of travel, but it may be formed on the opposite side of the direction of travel of the rim 1. If formed in this way, even if the user forgets to remove the mounting adjustment cover of the present invention before traveling, there is no problem because it easily comes off due to friction with the rim 1 due to the braking operation. Further, a disposable type may be manufactured. Further, the brake shoe attachment adjusting cover according to the present invention can be manufactured from various materials, for example, by processing a metal plate into a metal plate or molding a resin.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a state in which a brake shoe equipped with a mounting adjustment cover according to the present invention is fixed to a brake arm. 2 is a plan view of the mounting and adjusting cover according to the present invention, FIG. 3 is a front view of the mounting and adjusting cover according to the present invention, and FIG. 4 is a side view of the mounting and adjusting cover according to the present invention. 6 is a plan view and a front view showing another embodiment of the present invention, FIG. 7 is a front view of a caliper brake, and FIGS. 8 to 10 are views showing a conventional example. 1 ... rim, 4 ... brake shoe, 6a ... braking surface, 7
…… Brake shoe mounting adjustment cover, 8 …… Inner surface, 9
…… Outer surface, 10 …… Cover bottom, 11 …… Sidewall.

Claims (1)

[Scope of utility model registration request] 1. A cover bottom having an inner surface that abuts on a braking surface of a brake shoe and an outer surface that abuts on a rim surface, and is capable of positioning and adjusting the braking surface on the rim surface with a predetermined inclination, and a cover bottom portion. A brake shoe attachment adjustment cover for a bicycle, comprising a side wall portion extending from a peripheral edge and detachably engageable with a side portion of the brake shoe.