JPH0357595Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is applicable to bicycle brakes in which suspension wires are hooked to a pair of left and right brake arms, and particularly to suspension wires used in cantilever type or center-pull type brakes. This invention relates to a wire holder.

(Prior Art) Conventionally, cantilever type brakes shown in FIGS. 5 to 8 are known as an example of a bicycle brake equipped with this type of hanging wire receiving fitting.

In this cantilever type brake, a bearing part 2 of a brake arm (commonly known as a cantilever) 1, which has an approximately dogleg shape when viewed from the front of a pair of left and right, is brazed to a predetermined position of a bicycle front fork 3 via a bush (not shown). It is freely inserted into a female threaded shaft (not shown) of the mounting base 4 and supported by a retaining bolt 5 fixed to the end of the female threaded portion.
A coiled return spring 6 is wound between the mounting base 4 on the female threaded shaft and the brake arm bearing portion 2, and one end of the return spring 6 is inserted and fixed into the base 4, and the other end 6A is fixed to the mounting bolt 8 of the brake shoe 7 fixed to the brake arm 1, and the brake shoe 7 is constantly braked so that the elastic force of the return spring 6 separates the brake shoe 7 from the rim 10 of the bicycle tire 9. A reversing force is applied to the arm 1 in the direction indicated by arrow A in FIG. 6 with the female screw shaft as the center. In addition, at each tip of the brake arm 1,
Both ends of the hanging wire 11 are detachably connected, and the approximately central portion of the hanging wire 11 is relatively movable into an upwardly bulging arcuate groove 13 formed at the lower end of the hanging wire receiving fitting 12. It is hung. The hanging wire holder 12 has a substantially staggered shape, and the lower part of the widening hem is bent upward to form the arcuate groove 13 that bulges upward, and the upper part has an insertion hole 17.
is provided. A coupling bolt 19 having an inner wire coupling hole 18 is inserted into the insertion hole 17 with the washer 2.
A cap nut 22 is screwed onto the shaft of the coupling bolt 19 via a flat washer 21, and the inner wire 16 is inserted through the coupling hole 18 to connect the coupling bolt head 19A and the washer 20. is sandwiched in between.

Therefore, by operating the brake lever (not shown),
When the inner wire 16 is pulled upward, the brake arm 1 rotates about the female threaded shaft in the direction of arrow B in FIG. 6, and the brake shoe 7 comes into pressure contact with the rim 10 to apply braking.

In addition, as shown in FIG. 9, the hanging wire holder 1
2, the other end of the suspension wire 11 connected to one end of one brake arm 1 is locked, and the inner wire 16 whose end is connected to the end of the other brake arm 1
There is also an example in which the middle part is fixed by a fixture 23.

(Problem to be solved by the invention) Since a conventional bicycle brake equipped with a hanging wire holder is equipped with a pair of independent return springs 6 on the left and right, there is a possibility that the left and right return springs 6 may be out of balance. In this example, the relationship between brake shoe 7 and rim 10 is as follows.
The distance between the left and right sides is no longer equal, and a one-sided effect occurs.
Furthermore, the mounting base 4 that supports the bearing portions 2 of the left and right brake arms 1 is positioned relative to the center of the hawk 3.
It is conceivable that the rims 10 are not mounted in symmetrical positions with high precision, or that the center of the rim 10 itself does not completely coincide with the center between the forks 3. However, under such conditions, in most cases, it was inevitable that the brakes would be on one side, although there were differences in size, and there was currently no appropriate means to easily solve this problem. It is.

The latter hanging wire receiving fitting 12 is
The length ₂ of the suspension wire 11 can be changed from the locking position of the brake arm 1 to the end joining position of the brake arm 1, thereby making it possible to slightly correct the one-side effect condition. ₂ and the length ₁ from the inner wire connection position of the brake arm 1 to the fixture 23 of the metal fitting 12 changes at the same time, so the brake lever pulling distance, so-called lever stroke, changes greatly. There were flaws. In addition, inner wire 1
If the suspension wire fixing part 6 is insufficiently fixed and the inner wire 16 moves inadvertently with respect to the suspension wire holder 12, the stroke of the brake lever will momentarily increase and the braking will be interrupted. There is a risk that half of the functionality will be lost, leading to a very dangerous situation.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a hanging wire holder that can eliminate the one-sided brake condition.

(Means for solving the problems) In order to achieve the above object, the present invention takes the following technical measures.

That is, in the present invention, the hanging wire 11 whose both ends are removably connected to the ends of the pair of left and right brake arms 1 is suspended from the lower part, and the inner wire 1
In the hanging wire receiving fitting 12 formed by inserting and fixing the connecting bolt 19 connecting the six ends into the upper part, the hanging wire hooking part 24 formed at the lower part of the hanging wire receiving fitting 12 is configured so that the hanging wire 11 is relatively moved. It is characterized in that it includes a hanging wire fixing means 28 that can be fixed at any desired position.

(Function) According to the present invention, when the brake lever is operated and one side is working, the suspension wire 11 is moved to the side where one side is working with respect to the hanging wire receiving fitting 12, and then the brake lever is operated. Then, when the brake is in a state where the brake does not work on one side, the suspension wire 11 is immovably fixed to the suspension wire receiving fitting 12 by the suspension wire fixing means 28, and henceforth, the state where the brake does not work on one side is maintained.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2 show a cantilever type brake showing a first embodiment of the present invention, with a hanging wire holder 1
Components other than 2 are the same as those in the conventional example shown in FIG. 5, so the same reference numerals are given and detailed explanations are omitted.

The hanging wire holder 12 has a substantially staggered shape when viewed from the front, and has a groove-shaped hanging wire hooking part 24 at the bottom of the back surface.
is recessed to pass through in the lateral direction, and the lower inner surface of the hooking portion 24 is an arcuate surface 25 that bulges upward;
Relative movement with the hanging wire 11 can be carried out smoothly, and the hanging wire 11 is not forced to hang. Further, a bolt insertion hole (or screw hole) 27 is provided in the vertical wall surface 26 of the hanging wire hooking portion 24, and extends through the vertical wall surface 26 in the front-rear direction.

28 is a hanging wire fixing means, and the hanging wire pressing plate 2
9, a wire fixing bolt 30, and a nut (or cap nut) 31, the suspension wire pressing plate 29 is provided with a bolt insertion hole 32, and the wire fixing bolt 30 is inserted into the bolt insertion hole 32.
is inserted into the bolt insertion hole 27 of the hanging wire receiving fitting 12 and fixed with a nut 31.

The coupling bolt 19 is provided with an inner wire coupling hole, and the inner wire 16 is inserted into the coupling hole and sandwiched between the back surface of the hanging wire receiver 12 and the washer 21.

According to the first embodiment, after assembling the brake, when the brake lever (not shown) is operated and one side is applied, that is, there is a difference between the left and right brake shoes 7 and the rim 10. For example, when the gap on the left side is large, with respect to the hanging wire holder 12,
Move the hanging wire 11 to the right, and
1 so that the left side L ₁ becomes shorter and the right side L ₂ becomes longer, then tighten the nut 31 of the hanging wire fixing bolt 30 and attach the hanging wire 11 to the vertical wall surface 26 using the hanging wire pressing plate 29. Press and secure.
In this way, even if the brake effectiveness is corrected, the sum of the left and right lengths L ₁ and L ₂ of the suspension wire 11 remains unchanged, so the brake lever pull amount, that is, the lever stroke, hardly changes. Therefore, there is no need to re-adjust the inner wire 16 and the outer wire (not shown).

FIGS. 3 and 4 show a second embodiment of the present invention, which has the same shape as the hanging wire receiving fitting 12 of the conventional example, with a wire fixing means 28 attached thereto.

The wire fixing means 28 of the second embodiment includes a bolt 3
3 and its tightening nut 34, and a bolt 33 is attached to the lower part of the hanging wire holder 12.
An insertion hole 35 is provided at a position close to the wire 1 to the extent that it does not touch the wire 11, and the head 36 of the bolt 33 inserted into the hole 35 presses the hanging wire 11 and fixes it to the hanging fitting.

It goes without saying that the present invention is not limited to this embodiment, and other fixing means may be used.

Note that the brake one-sidedness correction operation in the second embodiment is the same as in the first embodiment.

Further, in the above embodiment, the present invention is applied to a cantilever type brake, but it goes without saying that the invention can also be applied to a suspension wire of a center pull type brake.

The hanging wire hooking portion 24 of the hanging wire receiving fitting 12 includes not only the arcuate groove 13 but also a guide roller.

(Effect of the invention) As described above, in the bicycle brake suspension wire holder according to the present invention, the suspension wire 11 is movable relative to the suspension wire hooking part 24 formed at the lower part, and the suspension wire 11 can be moved in any direction. Since it is provided with the hanging wire fixing means 28 that is fixed in position, the hanging wire receiving fitting 1
The lengths L ₁ and L ₂ of the brake arm 1 and the brake arm 1 can be changed and fixed as desired. Therefore, even if there are manufacturing errors in each brake part or variations in dimensional accuracy of the vehicle body, wheels, etc., the brake system can be fixed. You 7 and Rim 10
It is possible to equalize the distance between the two and easily correct the one-sided brake effect, and to obtain a brake that does not have one-sided effect, so that the brake function can be fully exerted and safety can be improved. , the brake can be adjusted quickly and reliably without readjusting the brake lever stroke.

[Brief explanation of the drawing]

Figures 1 and 2 show a first embodiment of the present invention, with Figure 1 being an overall perspective view and Figure 2 being a side view of main parts.
3 and 4 show the second embodiment, FIG. 3 is a rear view, FIG. 4 is a sectional view taken along line A-A in FIG. 3, and FIG.
9 to 9 show a conventional example, FIG. 5 is an overall perspective view, FIG. 6 is a front view showing the relationship between the brake arm etc. and the rim, and FIG. 7 is an exploded rear perspective view of the hanging wire holder. FIG. 8 is a partially cutaway side view, and FIG. 9 is a front view showing another conventional example. 1... Brake arm, 11... Hanging wire, 1
2... Hanging wire holder, 16... Inner wire,
19... Connection bolt, 24... Hanging wire hanging part,
28... Hanging wire fixing means.

Claims (1)

[Claims for Utility Model Registration] A hanging wire 11 whose both ends are removably connected to the ends of a pair of left and right brake arms 1 is suspended from the lower part, and a connecting bolt 19 is connected to the end of the inner wire 16. In the hanging wire receiving fitting 12 which is inserted and fixed at the upper part, the hanging wire hooking part 24 formed at the lower part of the hanging wire receiving fitting 12 allows the hanging wire 11 to be relatively movable and fixed at any position. A suspension wire holder for a bicycle brake, comprising a suspension wire fixing means 28.