JPS6327033Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on a caliper brake, in particular, an operating lever is pivotally supported on one side of a pair of brake arms equipped with a brake shoe, and a brake operating wire or the wire is guided to this lever. This invention relates to a caliper brake that supports a receiver on an outer cylinder.

Generally, this type of caliper brake has one brake shoe located on both sides of the wheel rim.
A receiver of an outer cylinder that has a pair of brake arms, and a control lever is swingably supported on one of the brake arms via a pivot, and a control wire or a receiver for guiding the wire is provided at the free end of the lever. For example, when replacing a bicycle wheel, the brake shoe is configured to widen the distance between the two brake shoes with a single touch by swinging the operating lever, thereby allowing the wheel to be replaced quickly. There is.

By the way, in the case of the caliper brake having the above structure, when the bicycle is taken out from a parking lot, for example, the outer cylinder is caught on the handlebar of an adjacent bicycle and is pulled outward, and as a result, the above-mentioned outer tube is pulled outward. There was a problem in that the operating lever would swing on its own, causing the shoe spacing to widen, and if the driver continued to ride the vehicle, the brakes would no longer operate properly, leading to an accident.

The present invention was devised in view of these circumstances, and its purpose is to provide a caliper brake that will not cause the operating lever to operate automatically even if the outer tube or operating wire is pulled carelessly. It is not intended to be provided.

Therefore, the present invention pivots an operating lever to one of a pair of brake arms having a brake shoe,
In a caliper brake in which the lever supports an operating wire or a receiver of an outer tube that guides the wire, the receiver is rotatably supported on the operating lever, and the receiver and the operating lever are connected to the support lever. An engaging portion is provided on one side of the brake arm that supports the brake arm, and an engaging protrusion that engages with the engaging portion by rotation of the receiver is provided on the other side.

An embodiment of the caliper brake of the present invention will be described below based on the drawings.

The illustrated caliper brake is equipped with a C-shaped brake arm 1 having a brake shoe 3 at one end, a brake shoe 4 at one end of a curved main rod 21, and a branch rod 22 in the middle of the curved main rod 21. Y with
The other end of the curved main rod 21 of the brake arm 2 is swingably supported by a pivot bolt 5 attached to the front fork or back fork of the bicycle frame, and a return spring 6 is attached to these arms 1 and 2.
is installed, and the spacing between the shoes 3 and 4 is widened by the spring 6, while the C-shaped brake arm 1
A first support 7 for fixing one end of the operating wire W is supported at the free end of the arm, and an operating lever 9 is freely swingable via a pivot 90 at the free end of the branch rod 22 of the Y-shaped brake arm 2. The second receiver 8 of the outer cylinder O is pivotally supported and guides the wire W to the free end of the operating lever 9, and these first and second receivers 7, 8
The two arms 1 and 2 are vertically opposed to each other with a predetermined distance apart, and the two arms 1 and 2 are oscillated and braked by pulling the wire W.

The operating lever 9 includes a pair of side plates 91 and 92 that face each other at a predetermined interval, and these side plates 91 and 92.
92, and an operating piece 94 integrally formed with the connecting plate 93, with the free ends of the branch rods 22 interposed between the side plates 91 and 92, and connected by the pivot shaft 90. are doing.

Further, the second holder 8 of the outer tube O is composed of a holder 81 that holds one end of the outer tube O, and a mounting shaft 82 that attaches the holder 81 to the free end of the operating lever 9. A screw hole 83 is formed at one end of the mounting shaft 82, and the holding body 81 is inserted into the screw hole 83.
It's like screwing on.

In the caliper brake configured as above, the second support 8 is rotatably supported with respect to the operating lever 9, and one of the brake arms 2 supporting the support 8 and the operating lever 9 is An engaging portion 11 is provided on one side, and an engaging protrusion 12 that engages with the engaging portion 11 when the receiver 8 rotates is provided on the other side.

That is, in the embodiment shown in the figure, the outer circumferential wall surface of the mounting shaft 82 in the second receiver 8 is chamfered in two to form a non-circular cross section, while the regulating plate 13 provided with the engaging protrusion 12 is separately formed. , a non-circular hole 1 having the same cross-sectional shape as the mounting shaft 82 is formed in the regulating plate 13.
3a, and the regulating plate 13 is non-rotatably supported on the mounting shaft 82 via the non-circular hole 13a.

On the other hand, side plates 91 and 92 in the operating lever 9
Circular holes 91a and 92a are formed in the free end portions of the mounting shaft 82, and the mounting shaft 82 is inserted into the circular holes 91a and 92a to rotate the mounting shaft 82, in other words, the second support 8 relative to the operating lever 9. The engaging portion 11, which is freely attached and engaged with the engaging protrusion 12 by rotation of the second receiver 8, is attached to the branch rod 2 of the Y-shaped brake arm 2.
2, specifically, a recess 23 is formed at the free end of the branch rod 22 and at a portion facing the regulation plate 13, and one inner side of the recess 23 is formed. is formed as the engaging portion 11, and as the engaging protrusion 12 engages with the engaging portion 11, rotation of the second receiver 8 relative to the operating lever 9 is prevented.

Reference numeral 95 in the figure is a cover that covers the outer periphery of the operating lever 9, and the cover 95 is provided with a boss portion 96 for preventing the regulating plate 13 from moving in the axial direction.

The present invention has the above-mentioned structure, and normally the operating lever 9 is positioned at the solid line position in FIG. 1 to maintain a predetermined distance between the brake shoes 3, 4 and the rim of the wheel A.

For example, when replacing the wheel A, if it is desired to increase the distance between the brake shoes 3 and 4, the operation lever 9 can be rotated about the pivot 90 in the direction of the arrow X in FIG. , the second receiver 8 is moved to the first receiver 7 by the operation of the lever 9.
The relative effective length between the operating wire W and the outer tube O changes as the operating wire W approaches the outer cylinder O, and as a result, the brake arms 1 and 2 move around the pivot bolt 5 at both ends due to the restoring force of the return spring 6. The two parts are mutually expanded.

For example, when taking out a bicycle from a parking lot, the outer tube O may get caught on an adjacent bicycle, etc.
When pulled in the direction of arrow Y in the figure, the second support 8 is rotatably supported relative to the operating lever 9, so the operating lever 9 does not rotate relative to the branch rod 22. , the second holder 8 and the outer cylinder O supported by the holder 8 swing in the direction of arrow Y in FIG. Coupling protrusion 12
immediately engages the engaging portion 11, and
Thereafter, the second receiver 8 to the outer tube O will not swing in the direction of the arrow Y in FIG. 4.

Therefore, even though the outer tube O is pulled as described above, there is no risk that the operating lever 9 will operate on its own and the shoe interval will expand inadvertently, and moreover, once the tension on the outer tube O is released, , the tension acting on the operating wire W causes the second receiver 8 to the outer tube O to move back to their original positions.

Incidentally, in the above embodiment, the engagement protrusion 12 is
The engaging part 11 is attached to the Y-shaped brake arm 2 on the receiver 8 side.
However, the engaging portion 11 is provided on the second receiver 8.
The engagement protrusions 12 may be provided on the Y-shaped brake arm 2, respectively.

Further, in the embodiment described above, the operating lever 9 was pivotally supported on the Y-shaped brake arm 2, and the second support 8 of the outer tube O was rotatably supported on the operating lever 9. The first receiver 7 of the operating wire W may be rotatably supported on the operating lever 9 while being pivotally supported on the C-shaped brake arm 1 .

As described above, the present invention rotatably supports an operating wire or a receiver of an outer tube that guides the wire on an operating lever pivotally supported on a brake arm, and a brake arm that supports the receiver and the operating lever. Since an engaging portion is provided on one side of the holder and an engaging protrusion is provided on the other side to engage with the engaging portion when the receiver rotates, even if the operating wire or the outer tube gets caught on another object, Even if it is pulled, there is no risk that the operating lever will operate on its own and the brake shoe interval will inadvertently widen.
Therefore, normal braking operation can always be expected.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the caliper brake according to the present invention, Fig. 2 is a side view, Fig. 3 is a partially cutaway side view showing an enlarged view of the main parts, and Figs. FIG. 5 is a partially cutaway rear view showing an enlarged main part. 1, 2... Brake arm, 3, 4... Brake shoe, 8... Receiver, 9... Operation lever, 11
...Engagement portion, 12...Engagement protrusion.

Claims (1)

[Scope of utility model registration request] A caliper brake in which an operating lever is pivotally supported on one side of a pair of brake arms having a brake shoe, and an operating wire or a receiver of an outer cylinder for guiding the wire is supported on the lever, and the receiver is mounted on the caliper brake. A brake arm rotatably supported on the operating lever, and an engaging portion on one side of the receiver and a brake arm supporting the operating lever, and an engaging portion on the other side that engages with the engaging portion as the receiver rotates. A caliper brake featuring a mating protrusion.