JPH0439107Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a caliper brake for a bicycle, and particularly relates to an improvement of an outer wire holding portion for holding an outer wire of a brake wire at one end of a brake arm.

<Prior Art> The outer wire of the brake wire in a bicycle caliper brake is generally inserted into and held by the head of an adjustment screw provided at one end of the brake arm. Since it is simply inserted through an insertion hole drilled at one end of the arm, when shipping and packaging the caliper brake, it was necessary to secure it with a rubber band or the like to prevent the adjustment screw from falling off.

<Problem to be solved by the invention> Therefore, one end of the brake arm where the insertion hole is provided is covered with a synthetic resin covering, and a hole communicating with the insertion hole of the arm is provided in the center of the covering.
The inner diameter of the hole is made slightly smaller than the outer diameter of the adjustment screw, and the adjustment screw is inserted into the hole of the covering and the insertion hole so that it does not fall out (Jet Kaisho).
(See Publication No. 64-1093, etc.).

However, when attaching an adjustment screw to an outer wire holding part provided with this type of sheath, the nut screwed into the adjustment screw is located outside the sheath, and the outer periphery of the adjustment screw is placed in the hole of the sheath. Since it only engages with the periphery, if the error in the hole diameter of the sheath varies to the positive side, the engagement between the adjustment screw and the sheath will be very small, and vibrations during product transportation may cause the adjustment screw to There was an issue where the tube could fall off the arm.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a bicycle caliper brake in which the adjustment screw can be easily and reliably fixed at one end of the arm.

<Means for Solving the Problems> In order to achieve the above object, the bicycle caliper brake of the present invention is a bicycle caliper brake in which a cover is placed on the arm end where the adjustment screw for holding the outer wire is provided. In caliper brakes for
An accommodating chamber for accommodating the nut inside the covering body is formed continuously with an insertion chamber for inserting the arm end, the accommodating chamber is formed to prevent rotation of the nut, and the accommodating chamber is formed so as to prevent rotation of the nut. With the nut placed in the chamber, the covering is placed over the arm end of the brake arm, and the adjustment screw is inserted through the insertion hole of the covering and screwed onto the nut.

<Operation> When attaching the adjustment screw for holding the outer wire to the arm end of the brake arm, first accommodate the nut in the accommodation chamber inside the sheathing, and in that state, cover the arm end at the fixed position. , insert the end of the arm into the insertion chamber within the sheath. Then, the adjustment screw is inserted through the insertion hole of the cover and screwed into the internal nut. In this state, if the adjustment screw is screwed in as far as it will go, the adjustment screw will be inserted into the insertion hole at the end of the arm, and the top wall of the covering will be sandwiched between the nut and the head of the adjustment screw. As a result, the cover and adjustment screw are securely attached to the end of the arm and will not fall off. Furthermore, since the nut is also covered with the covering, the nut is less likely to rust.

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

As shown in FIG. 1, a bicycle caliper brake is composed of a substantially C-shaped brake arm 1 and a substantially Y-shaped brake arm 2, whose centers are pivoted by a bolt shaft 3. A brake shoe 4 is attached to the tip of the brake arm 1 and the tip of the brake arm 2 so as to face each other.

The two brake arms 1 and 2 are biased by a spring 5 in a direction to separate the brake shoe 4 at the tip thereof.

A hole is formed in the other end of the brake arm 1, and a fixing bolt 6 for fixing the inner wire of the brake wire is inserted into the hole and is tightened and fixed with a nut.

The other end of the approximately Y-shaped brake arm 2 is an arm end 2a bent approximately perpendicularly from the arm surface.
The arm end 2a is formed with an insertion hole 2b through which the adjustment screw 8 for holding the outer wire is loosely inserted.

This arm end 2a is covered with a cover 10 for holding the adjustment screw 8 and nut 9. The cover 10 is made of synthetic resin and is formed into a box shape so as to be placed over the arm end 2a, as shown in FIGS. 2 to 5.

An insertion chamber 11 into which the arm end 2a is inserted is formed inside the covering 10, and an accommodation chamber above the insertion chamber 11 into which a nut 9 to be screwed into the adjustment screw tube 8 is accommodated. 12 is formed continuously with the insertion chamber 11. The storage chamber 12 is formed into a hexagonal shape that allows the nut 9 to fit therein so as to prevent the nut 9 from rotating, and the screw portion of the adjustment screw tube 8 is inserted into the upper wall portion of the storage chamber 12, and its head is inserted into the upper wall thereof. An insertion hole 13 having a diameter that cannot be penetrated is bored. Further, on the lower side of the covering 10, that is, on the opposite side of the upper wall where the insertion hole 13 is located,
An opening hole 14 large enough to insert the nut 9 is provided.

When attaching the adjustment screw 8 for holding the outer wire to the arm end 2a of the brake arm 2, first,
A nut is accommodated in the accommodation chamber 12 within the covering body 10,
In this state, the covering 10 is placed over the arm end 2a at a fixed position, and the arm end 2a is inserted into the insertion chamber 11 within the covering 10. Then, the adjustment screw 8 is inserted through the insertion hole 13 in the upper wall of the covering 10, and its threaded portion is screwed into the nut 9 inside. In this state, if the adjustment screw 8 is screwed all the way, the adjustment screw 8 will be inserted into the insertion hole 2b of the arm end 2a.
The upper wall of the covering 10 is sandwiched between the nut 9 and the head of the adjusting screw 8, and the covering 10 and adjusting screw 8 are securely attached to the arm end 2a and will not come off.

Therefore, when transporting the caliper brake product, there is no fear that the adjusting screw tube 8 will fall off due to vibration or the like.

When a caliper brake is attached to a bicycle and a brake wire is connected, the outer wire tip is inserted into the head of the adjustment screw tube 8, and the inner wire tip is passed through the adjustment screw tube 8 before connecting the brake wire. Insert it into the hole of the fixing bolt 6 at the end of the arm 1, and tighten and fix it with a nut. When adjusting the brake by turning the adjustment screw 8, since the nut 9 is prevented from rotating within the insertion chamber 11 of the cover 10, the adjustment can be easily made by turning the adjustment screw 8.

<Effects of the invention> As explained above, according to the bicycle caliper brake of the invention, the accommodation chamber for accommodating the nut inside the covering body is continuous with the insertion chamber for inserting the arm end. The accommodation chamber is formed to prevent rotation of the nut, and with the nut inserted into the accommodation chamber of the covering, the covering is placed over the arm end of the brake arm, and the adjustment screw is inserted into the covering. Since it is configured to be installed by screwing it onto the insertion nut through the insertion hole, when the adjustment screw is installed, the upper wall of the cover is sandwiched between the nut and the head of the adjustment screw. Therefore, the covering body and the adjusting screw are securely attached to the end of the arm, and there is no fear that the adjusting screw will fall off due to vibration or the like when transporting the caliper brake product. Furthermore, since the nut is covered with the covering, there is an advantage that the nut does not easily rust even after long-term use.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a front view of a caliper brake, Fig. 2 is a side view of the covering, Fig. 3 is a plan view of the covering, and Fig. 4 is a bottom view thereof. FIG. 5 is a cross-sectional view taken from FIG. 3, and FIG. 6 is an assembled perspective view of the cover and the adjustment screw. DESCRIPTION OF SYMBOLS 1, 2...Brake arm, 2a...Arm end, 2b...Insertion hole, 8...Adjustment screw, 9...Nut, 10...Coating, 11...Insertion chamber, 12...
...Containment chamber, 13...Insertion hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A bicycle caliper brake in which a covering is placed over the end of an arm provided with an adjustment screw for holding an outer wire, and a housing chamber for accommodating a nut inside the covering. is formed continuously with an insertion chamber for inserting the end of the arm, the housing chamber is formed to prevent rotation of the nut, and when the nut is inserted into the housing chamber of the covering body, The bicycle caliper brake is configured such that the covering body is placed over an arm end of a brake arm, and the adjustment screw is inserted through an insertion hole of the covering body and screwed onto the nut.