JPH0529539Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a brake shoe that is attached to a brake arm of a bicycle caliper brake, a cantilever brake, or the like.

(Prior Art) For example, as a brake shoe attached to a brake arm of a bicycle brake, there is a brake shoe as shown in FIG. This is because a boat-shaped support aggregate 32 is buried in the rear surface 31a of the shoe body 31 that is pressed against the rim of the wheel, and the center portion 32a of the bottom wall of this support aggregate 32 is exposed from the rear surface 31a of the shoe body. At the same time, a mounting bolt 33 is projected outward from the center portion 32a of the bottom wall, and the mounting bolt 33 is inserted into the mounting hole 35 of the mounting portion 34 of the brake arm.
The brake arm is fixed to the mounting portion 34 of the brake arm by inserting the brake arm into the mounting bolt 33 and tightening a nut 36 that is screwed onto the tip of the mounting bolt 33.

(Problems to be Solved by the Invention) In the conventional shoe body 31, the shoe body 31 cracks due to aging, that is, deterioration due to oxidation, the influence of sunlight or the adhesion of mud and water, and the shoe body 31 becomes cracked. There is a risk that the main body 31 and the supporting aggregate 32 will separate, and the nut 36 may become loose after long-term use. Furthermore, when fixing the brake shoe to the brake arm, the adjustment work of rotating the shoe body 31 around the mounting bolt 33 so that the rim contacting surface of the shoe body 31 properly contacts the rim is done manually by the operator. It was a complicated process because it had to be carried out by holding the .

Therefore, the present invention protects the supporting aggregate embedded part of the shoe body, prevents the tightening nuts from loosening, and makes adjustments to rotate the shoe body around the mounting bolt so that the shoe body properly contacts the rim. The purpose of the present invention is to provide a brake shoe that can be easily used.

(Means for Solving the Problem) The technical means taken to achieve the above object of the present invention is to embed a supporting aggregate 11 in the back side 10a of the shoe body 10 that is pressed against the rim 8 of the wheel 7. ,
The back surface 10a of the shoe body 10 is attached to this support aggregate 11.
The mounting portion 2 of the brake arms 2 and 3 protrudes from the
A mounting bolt 12 passing through a and 3a is provided, and a nut 14 is screwed onto the tip side of this mounting bolt 12.
In the brake shoe which is fixed to the brake arms 2 and 3 by tightening, a cover body 16 is provided on the rear surface 10a side of the shoe body 10 to cover the embedded part of the supporting aggregate 11,
The cover body 16 is made of an elastic material, and a wall portion 16a of the cover body 16 facing the shoe main body back surface 10a is pressed against the mounting portions 2a and 3a of the brake arms 2 and 3 by tightening the nut 14. The structure is configured to be spaced apart from the back surface 10a of the shoe main body so as to be elastically deformed.

(Function) The support aggregate 11 embedded portion of the shoe body 10 is covered by a cover body 16 provided on the rear side 10a of the shoe body.
is protected from deterioration. Also, when attaching the brake shoe 9 to the attachment parts 2a and 3a of the brake arms 2 and 3, the attachment bolt 12
are passed through the mounting parts 2a and 3a, and the mounting bolt 1
By screwing and tightening the nut 14 on the tip side of the brake shoe 2, the nut 14 and the shoe body 10 compress the mounting portions 2a and 3a, and the brake shoe 9 is fixed. At this time, the wall portion 16a of the cover body 16 facing the back surface 10a of the shoe body is attached to the mounting portions 2a, 3.
a, the nut 14 is elastically deformed toward the rear surface 10a of the shoe body, and this elastic restoring force prevents the nut 14 from loosening. Furthermore, when adjusting the shoe body 10 by rotating it around the mounting bolt 12 so that the shoe body 10 properly contacts the rim 8 of the wheel 7,
The elastic restoring force of the wall portion 16a of the cover body 16 adjusts the tightening force of the nut 14 to hold the shoe body 10 so that it can freely rotate around the mounting bolt 12 but does not rotate naturally. The adjustment can be easily performed.

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

In Figure 3, 1 is a caliper brake,
A pair of brake arms 2 and 3 are provided. Both arms 2, 3 are swingably supported by a support shaft 4 attached to the frame of the bicycle, and the attachment parts 2a, 3a at the ends of the brake arms 2, 3 are connected to the wheels by the traction operation of the Bowden wire 5 and the return spring 6. 7 rim 8
It is now possible to approach and separate from the enemy.

Attachment parts 2a, 3a of the brake arms 2, 3
A brake shoe 9 is attached to the brake shoe 9, and the brake shoe 9 includes a block-shaped shoe body 10 that is pressed against the rim 8. The shoe main body 10 is made of hard rubber or the like, and a boat-shaped metal support aggregate 11 is embedded in its back side (the side opposite to the side pressed against the rim 8). Shu main body 1 where 11 is buried
The outer surface of 0 is a fitting part 15 formed in a stepped shape. A bottom wall central portion 11a of the supporting aggregate 11 is exposed in a protruding manner from the back surface 10a of the shoe body 10, and a mounting bolt 12 is provided to protrude outward through the bottom wall central portion 11a. . The head 12a of this mounting bolt 12 is located at the bottom wall central portion 11a.
It is located on the inner surface side of the shoe body 10 and is embedded in the shoe body 10. The shaft portion 12b of the mounting bolt 12 is inserted into a vertically long mounting hole 13 formed in the mounting portions 2a, 3a of the brake arms 2, 3, and a nut 14 is screwed onto the tip end thereof. The brake shoe 9 is attached to the brake arms 2 and 3 by.

Further, a boat-shaped cover body 16 made of an elastic material such as resin is fitted into the fitting portion 15 of the shoe body 10, and this covers the back side of the shoe body 10 and surrounds the support aggregate 11. The thin part of the shoe body 10 is protected. An opening 17 is formed in the center of the bottom wall 16a of the cover body 16,
From the opening 17 of the shaft 1 of the mounting bolt 12
2b stands out. Further, the opening 17 is formed to be slightly larger than the outer end surface of the bottom wall central portion 11a of the support aggregate 11, and the bottom wall portion 16a of the cover body 16 is sloped outward from both longitudinal ends to the central portion. It is isolated from the back surface 10a of the main body 10, and abuts on the mounting portions 2a, 3a of the brake arms 2, 3 at the peripheral edge of the opening 17. By tightening the nut 14 screwed into the mounting bolt 12 of the brake shoe 19, the bottom wall portion 16a of the cover body 16 is attached to the mounting portion 2 of the brake arm 2, 3.
a, 3a, the shoe main body 10 is elastically deformed toward the rear surface 10a, and this elastic restoring force prevents the nut 14 from loosening. Further, the tightening force of the nut 14 is adjusted by the elastic restoring force of the bottom wall portion 16a of the shoe body 10.
0 can be freely rotated around the mounting bolt 12 and held to the extent that it does not rotate naturally, so that the shoe main body 10 can be rotated around the mounting bolt 12 and the shoe main body 10 can properly contact the rim 8 of the wheel 7. This makes it easier to make adjustments.

Note that the cover body 10 may be formed of spring steel or the like. Further, the present invention can be applied to cantilever type brakes and other brakes.

(Effect of the invention) According to the invention, the supporting aggregate 1 of the shoe body 10
1 buried portion is covered and protected by the cover body 16, and deterioration due to aging is prevented. Also,
A wall portion 16a of the cover body 16 facing the rear surface 10a of the shoe main body is configured to have a gap from the rear surface 10a, and the brake shoe 9 is fixed to the mounting portions 2a and 3a of the brake arms 2 and 3 by tightening the nut 14. At this time, the wall portion 16a of the cover body 16 is pressed against the mounting portions 2a, 3a and is elastically deformed, and this elastic restoring force can prevent the nut 14 from loosening. Furthermore, the elastic restoring force of the wall portion 16a of the cover body 16 allows the tightening force of the nut 14 to be adjusted to hold the shoe body 10 to the extent that it can freely rotate around the mounting bolt 12 and does not rotate naturally. This makes it easy to adjust the shoe body 10 by rotating it around the mounting bolt 12 so that the shoe body 10 properly contacts the rim 8 of the wheel 7.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a sectional view taken along the line in FIG. 3, FIG. 2 is a front sectional view of the main parts, and FIG. 3 is an overall front view of the brake. ,
FIG. 4 is a sectional view showing a conventional example. 2...Brake arm, 2a...Mounting part, 3...
... Brake arm, 3a... Mounting part, 9... Brake shoe, 10... Shoe body, 10a... Back, 11... Supporting aggregate, 12... Mounting bolt, 1
6...Cover body, 16a...Bottom wall portion.

Claims (1)

[Claims for Utility Model Registration] A support aggregate 11 is embedded in the rear surface 10a of the shoe body 10 that is pressed against the rim 8 of the wheel 7, and a brake arm is provided in the support aggregate 11 protruding from the rear surface 10a of the shoe body 10. The brake shoe is provided with a mounting bolt 12 passing through the mounting portions 2a, 3a of 2, 3, and is fixed to the brake arm 2, 3 by tightening a nut 14 screwed onto the tip side of the mounting bolt 12. A cover body 16 is provided on the rear surface 10a side of the shoe body 10 to cover the buried portion of the support aggregate 11,
The cover body 16 is made of an elastic material, and a wall portion 16a of the cover body 16 facing the shoe main body back surface 10a is pressed against the mounting portions 2a and 3a of the brake arms 2 and 3 by tightening the nut 14. 1. A brake shoe characterized in that the brake shoe is configured to be spaced apart from the rear surface 10a of the shoe body so as to be elastically deformed.