JPH0541993Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention a. Industrial application field The present invention relates to the improvement of a bicycle hangaratsug (also called hangashiel), and has particular characteristics in relation to the attachment of a rear crank for a rear brake. It is something.

b. Prior Art If the rear brake of a bicycle is actuated via a rod, it is necessary to have something that rotatably supports the rear crank on or near the hanger rack itself.
The first conventional example is one in which a shaft support member is attached to a hangarug or a vertical pipe close to it using a tightening band, and the rear crank is supported by this member [for example, JIS Terminology Dictionary Machinery/Metal Bicycle Supplies] (See part name) D9101-1963].

Second, Figure 3 on page 605 of the Practical Bicycle Handbook (3rd edition) [edited and published by the Bicycle Industry Promotion Association],
As described in 4-4a, the rear crank is directly supported by bolts on the lower pipe at or near the hangar plug. Thirdly, as shown in Figures 3 and 4-4b on page 605 of the same handbook, a shaft supporting protrusion is provided on the lower pipe at or near the lower part of the hangarug using screws or brazing, and the rear crank is attached thereto. There is something that supports it.

c. Problems to be solved by the invention Among the conventional techniques mentioned above, the one in which the rear crank is supported by a shaft supporting member attached by the first tightening band has a large number of parts, which increases the cost and also increases the assembly cost. There is a problem that the work is time consuming.
Directly bolting the rear crank to the second hanger lug or the lower pipe near it reduces the number of parts, but requires a specially shaped rear crank, which lacks versatility and increases costs. Furthermore, if the rear crank is supported by screwing, brazing, or spot welding a shaft support piece to the lower pipe at or near the bottom of the third hanging rack, it is time-consuming to install the shaft support piece. In addition, there is also a problem with the mounting strength.

The present invention is an attempt to solve the above-mentioned problems of the prior art with regard to the hanger hook in relation to the rear crank. In other words, the purpose of the present invention is to reduce costs by reducing the number of parts in relation to the installation of the rear crank, to save time and effort on assembly work, and to allow the use of rear cranks of general shape. It is an object of the present invention to provide a hanger hook which has excellent mounting strength and also has an internal water draining function.

B. Structure of the invention a. Means for solving the problems The bicycle hanger lug of the present invention has a hanger lug in which a part of the bottom of the hanger lug is cut downward to form a pivot support piece 1 for the rear crank 4 for the rear brake, and
The hole created at that time is used as a drainage hole 2, and the shaft support piece 1 is formed with a small hole 3 through which a shaft support bolt 5 is inserted.

In the above configuration, the material of the hanger plug is, for example, carbon steel, chromium molybdenum steel, or the like. It is preferable that the shaft support piece 1 is cut and raised downward from the center of the bottom of the hanger hook to the right when viewed from the front. This cutting and bending may be performed, for example, by press working. The small hole 3 of the shaft support piece 1 is formed in the left-right direction so that the rear crank 4 can be rotated in the front-back direction.

In the figure, 6 is the lower pipe, 7 is the vertical pipe, and 8 is the lower pipe.
9 is the chain stay, 9 is the brake rod, and 10 is the control rod.

b. Effect The usage condition of the hangarug of the present invention is as follows. That is, as shown in FIGS. 2 and 3, the rear crank 4 is supported on the shaft support piece 1 at the bottom of the hanger lug, and the shaft support bolt 5 is passed through the small hole 3 so as to be rotatable in the front and rear direction. . Then, a brake rod 9 is connected to the front part of the crank 4 in the same way as a general brake rod,
The control rod 10 may be connected to the rear part and assembled.

According to this hanger plug, even if water or rain enters from the top of the vertical pipe 7, for example, when washing a car, it will be discharged from the drain hole 2 at the bottom once it reaches the lower hanger plug.

C. Effects of the invention As is clear from the above, the bicycle handle of the invention has the following effects.

a) Due to the relationship between the rear brake and the rear crank, the number of parts can be reduced to reduce costs and the assembly work can be simplified. That is, the conventional tightening band in which a shaft supporting member is attached to or near the hangar plug to support the rear crank requires a large number of parts and requires a lot of effort to assemble. However, in the hangarug of the present invention, the shaft support piece is cut and raised at the bottom and is integrally molded.
The number of parts is small, reducing costs, and the rear crank can be assembled easily and quickly.

b. Instead of using a specially shaped rear crank, a conventional rear crank can be used. That is, the conventional method of screwing the rear crank to or near the hangar plug is a simple method, but the rear crank has a special shape and lacks versatility. On the other hand, according to the present invention, it is sufficient to simply support the conventional rear crank as it is, thereby providing versatility and reducing costs.

c. In addition to being easy to manufacture, the shaft support piece also has excellent strength. That is, in the conventional method of screwing, brazing, or spot welding the shaft support piece to the bottom of the hanger hanger, it takes time and effort to attach the shaft support piece, and there is also a problem in the strength of the installation. However, in the present invention, a portion of the bottom of the hanger rug is cut and raised and integrally molded to form the shaft support piece, so manufacturing is easy and the shaft support piece has excellent strength.

d Water can be drained. That is, water from washing a car or rainwater may enter and accumulate in the hangar plug mainly from the upper part of the vertical pipe, so some kind of drainage means is required. In the present invention, as described above, the water drain hole is formed at the same time as the shaft support piece is formed, so there is no need to form a special water drain means.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view from below, FIG. 2 is a bottom view, and FIG. 3 is a right side view. Drawing code: 1...Spindle support piece, 2...Drainage hole, 3...Small hole, 4...Rear crank, 5...Spindle support bolt.

Claims (1)

[Scope of utility model registration request] A part of the bottom is cut downward to form a shaft support piece 1 for the rear brake rear crank 4 and a water drain hole 2, and a shaft support bolt 5 is inserted into the shaft support piece 1. A bicycle hanger with a small hole 3 formed.