JPH0245289A - Brake - Google Patents

Abstract

PURPOSE: To precisely perform a braking operation in a brake for a bicycle or the like by providing, on the pin of the cantilever of the brake, a regulating means for varying the axial position of a lever to the pin. CONSTITUTION: When the position of a brake lever is regulated, a screw 19 is released from a pin 4, and a second tubular member 12 is fastened and loosened to a first tubular member 11 to set the brake lever to a position required for the brake lever. The first and second tubular members 11, 12 are then fixed to mutually relative positions by the screw 19. Then, the head 19a of the screw 19 cooperates with the annular shoulder part 12a of the second tubular member 12 to fix the joint bush 9 of the brake lever in a new axial position. According to this structure, the lever can be regulated so as to be surely operable without trouble, and the braking operation can be correctly performed.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a pair of L-shaped cantilever pins that are connected to a frame through joints of cantilever pins that have shafts that are approximately parallel to the center plane of the bicycle and arranged on both sides of the center plane. bicycles and similar levers, each lever having a first arm connected to an operating cable and a second arm to which a friction block arranged to cooperate with the rim of the wheel is fixed. Regarding the brakes of things. [Prior Art and Technical Problems of the Invention] This type of brake is mainly used on "mountain pike" type bicycles, and is applied near the wheel, from the center of rotation of the wheel to the rim or radially inward. It has articulation pins located radially outwardly apart. The first of the former
In the latter case, the brake is known as a "cantilever" brake, and in the latter second case, i.e. when the radial distance of the articulation pin with respect to the center of rotation of the wheel is greater than the radial distance of the rim, the actuating end of both levers The portions are arranged crosswise to each other across the midplane. As is well known, the articulation pin is fixed to the front wheel by welding to the tube of the fork, while for the rear wheel it is fixed to the horizontal or vertical tube of the rear triangular frame. This welding of the pins to the frame does not ensure that the axes of the pins are parallel, creating the problem of interference between each pair of levers. This is particularly evident in the second type of brake mentioned above, in which the first arm of the first lever is provided with a hole through which the first arm of the second lever passes. In practice, it is possible to avoid this obstruction problem to some extent with conventional levers by making the actuating surfaces of the two levers considerably wobbly, but this arrangement
This cannot be used in brakes with crossed levers in which one lever is inserted into a hole formed in the other lever. Furthermore, in the first and second type of cantilever brakes described above, wobbling of the actuating surface creates new problems with respect to the correct operation of the friction block connected to the lever. The object of the invention is to provide a brake of the above-mentioned type, which does not have the problems mentioned above and is simple and inexpensive to manufacture.

[Means to solve the problem]

According to the present invention, the above object is achieved by the following characteristic configurations. That is, at least one pin is provided with adjustment means for varying the axial position of the lever relative to the articulation pin. In particular, the adjustment means includes a first threaded tubular member that is tightened and fixed to the pin, and a second threaded tubular member that is threadedly engaged with the first tubular member, which are rotatable but restrained in the axial direction. an articulated bushing which is attached to the second tubular member and is configured with a lever; and means for securing the first and second threaded tubular members.

[Action and effect of the invention]

These features enable the above-mentioned movement from a position in such a frame where the respective articulation pins are coupled by moving the lever forward or by acting on the second threaded tubular member with a key or similar tool. It becomes possible to move the lever away. Any deviation between the two levers is thus eliminated and their relative position can be adjusted in such a way that they operate within one cross-section, allowing correct operation of the brake.

【Example】

A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3, but the present invention is not limited to this embodiment. FIG. 1 is a front view showing the shape of the brake according to the present invention attached to a bicycle, FIG. 2 is a sectional view taken along the line ■-■ in FIG.
It is a sectional view taken along the line -III. In these figures, the brakes of the bicycle are indicated by l, the second lever 2 and the second lever 3.
It is equipped with Each of these levers is articulated to a pin 4, generally in the form of an ellipse, welded to a portion of the bicycle frame, for example a tube of a fork (not shown). The pins 4 are arranged opposite to each other on both sides of the center plane of the bicycle, indicated by P, and are arranged further apart in the radial direction from the center of the wheel than the rim C. The pin 4 connects the first and second levers 2 and 3 to the first
Divided into arms 2g, 3a and second arms 2b, 3b,
The first arm 2 a, 3 a is connected in a known manner to the end of an intermediate operating cable 5 which in turn is connected at 6 parts to a tension cable 7, and the second arm 2 b, 3 b brakes the wheels. It is connected to a friction flock A which is mounted to cooperate with a rim C to do this. The second lever 3 includes a hole 8 formed in the first arm 3a,
Each brake lever, through which the first arm 2a of the first lever 2 passes, also has a bush-like part 9 in the middle, which is articulated with the respective pin 4. Each pin has a base part 4a that is welded to the bicycle frame and a second part connected to a first part by an annular shoulder lO and having a smaller diameter than the first part. 1st
The tubular member II is formed with a male thread at its end 11a and is slidably mounted in the axial direction on the second portion 4b of the pin 4 and adjacent to the annular shoulder 10. The female threaded portion 12a of the second tubular member 12 is coaxial with the pin 4 and threadedly engaged with the male threaded end 11a, and a central portion 9 (hereinafter referred to as a bushing) of each lever 2 or 3 is attached above the female threaded portion 12a. The angle friction sleeve 13, which is pushed into and fixed to the bushing 9, is sandwiched between the second tubular member 12 and the bushing 9 of the lever. An end 13a is provided to cooperate with the annular shoulder 12c of the member 12 to restrict movement of the bushing 9. It is provided with a cylindrical seat 9a coaxial with the axis X-x.This coil spring 4 biases the brake lever when it is not operated by the tension cable 7.One end 14a of the spring 14 is fixed to a disk member 15 which is fastened and fixed to the first tubular member 11, and a spring 14 is attached to the disk member 15.
Articulated bush 9 to allow initial loading of
A radial appendage 15a is formed which cooperates with each notch [6]. The second tubular member 12 has a second portion opposite to the first portion 12a.
The first tubular member If has a second portion 12b.
A hexagonal seat 17 is provided on the inside for inserting a key for rotating the tubular member I2 so as to be screwed into the tubular member I2. The second member 4b of each pin 4 is also provided with a blind hole 18 coaxial with the axis XX of the pin 4 and formed with a female thread,
A shank 19a of a screw 19 is screwed into this blind hole I8. This screw 19 then has a head +9b adjacent to the end 12b of the second tubular member 12. This head 19b also cooperates with the front recessed seat 9b of the articulating bushing 9 to restrain the articulating bushing 9 on the second tubular member 12 in the axial direction. Instead of the screw I9, a threaded shank having a nut on which the head 19b is screwed may be provided fixed to the pin 4. In FIG. 1, two pins 4 are welded to the frame of the bicycle and prevent the first arm 2a of the first lever 2 from being inserted into the 68 of the first arm 3a of the second lever 3. A case is shown in which the axial directions of these pins 4 do not match within a range that would cause the following problem. In order to eliminate these blockage problems, the operator can move one or both of the levers 2 and 3 forward or backward to center the arm 2a in the hole 8, so that one of the pins 4 Or both, and in this way it is possible to limit the width of the hole at the design stage. To enable its adjustment, the operator removes the screw 19 from the pin 4 and uses a suitable key to adjust the second tubular member I.
2 relative to the first tubular member 11 and loosening it. Once the required position of the lever is obtained, the two tubular members 11 and 12 are fixed in position relative to each other by a screw 19, the head 19a of which screws into the annular shoulder 12c of the second tubular member 12. In cooperation with this, provision is made for fixing the articulating bush 9 of the lever axially in its new position. Tightening of the screw 19 into the pin 4 results in a frictional clamping fixation of the first tubular member 11 through cooperation with the annular shoulder 10 of the pin 4 . The lever position described above as an embodiment of the present invention is
The adjustment device can also be advantageously used for cantilever type brakes.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the shape of the brake according to the present invention attached to a bicycle, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 2. It is an arrow sectional view. A...Friction block, C...Rim, P...Central surface,
X-X...pin shaft, 2...first lever, 3...second lever, 2a, 3a-first arm, 2b,
3 b - Second arm, 4 Pin, 5 Intermediate operating cable as operating cable, 7 Pulling cable as operating cable, 8 Hole, 9 Joint bush, 9b... First end of joint bush, 10... Annular shoulder of pin, 11... First tubular member as adjusting means, 11a... Threaded portion of first tubular member, 12... As adjusting means Second tubular member, 12a... Threaded portion of the second tubular member, 12c... Annular shoulder portion of the second tubular member, 13
a...Second end of joint bushing, 17. Hexagonal seat, 18..Threaded hole, I9..First and second
Screw as a fixing means for a tubular member, 19a Screw head Patent Applicant: Campagnolo Esse, Ltd.
Shi/Technology, Shiro Attorney, Patent Attorney Maede Ao (1 other person)

Claims (7)

[Claims] (1), articulated to the frame at the position of the cantilever pin (4), which is arranged opposite to both sides of the central plane (P) of the bicycle and has an axis (X-X) approximately parallel to the central plane (P); It comprises a pair of coupled levers (2, 3), which levers are connected to a first arm (2a, 3a) provided to be connected to an operating cable (5, 7) and a wheel rim (C). ) and a second arm (2b, 3b) on which a friction block (A) is fixed, which is arranged to cooperate with the adjustment means (11, 3b).
12) at least one pin (4) for axial position change of the levers (2, 3) relative to the articulation pin (4).
) Brakes for bicycles or similar objects, characterized in that they are combined with (2) The adjustment means includes a first tubular member (11) which is tightened by the pin (4) and includes a threaded portion (11a);
a second tubular member (12) equipped with a threaded portion (12a) that is screwed into the second tubular member (12), which is rotatable but axially constrained and attached to the second tubular member (12); Claim characterized in that it comprises: an articulation bush (9) configured with the levers (2, 3); and means (19) for fixing the first and second threaded tubular members (11, 12). 1
Brakes as described. (3), the first and second threaded tubular members (11,
12), the means (19) for fixing the joint pin (4)
a hole (18) coaxially threaded with the hole (18); and a head (18) provided to be screwed into the hole (18) and to clamp the first and second tubular members to the pin (4).
3. Brake according to claim 2, characterized in that it comprises a screw (19) having a thread (19a). (4) The joint bushing (9) has a first end (9b) and a second end (13a), and the first end (9b) and the second end (13a) are connected to the screw. (19) head (19a
) and an annular shoulder (12c) of the second tubular member (12).
4. Brake according to claim 3, characterized in that said bushing (9) is axially restrained on said second end (13a), respectively, in cooperation with said second end (13a). (5), the first tubular member (
11) is tightened and fixed by the annular shoulder (1) of the pin (4).
The axial force necessary for said tightening fixation is achieved by friction with said screw (19) into said pin (4).
4. The brake according to claim 2, wherein the brake is secured by tightening the brake. 6. Brake according to claim 1, characterized in that the second tubular member (12) has a hexagonal seat (17) for inserting an operating key. (7) The first arm (3a) of one of the two levers (2, 3) has a hole ( 8)
The brake according to any one of claims 1 to 6, comprising: