JPH0213279Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an H-shaped frame that connects a bicycle head pipe and a vertical pipe through a single main pipe.

Figure 1 shows an example of a conventional bicycle (see Utility Model Publication No. 52-50523) with an H-shaped frame and a center hanger. In the figure, 1 is a head pipe, 2 is a vertical pipe, 3 is a main pipe, and 4 is chain stay, 5 is back hawk, 6 is vertical pipe 2 and main pipe 3
7 is a carrier stay whose front end is connected to the back hawk 5, and 8 is a carrier back stay that supports the rear part of the carrier stay 7.

As mentioned above, since the conventional mid-hanger 6 and carrier stay 7 were each attached to the bicycle frame separately, there was a disadvantage that the number of connections increased, and the number of man-hours for processing and assembly increased accordingly.

The present invention was devised to eliminate the above-mentioned drawbacks.Brackets are provided on each of the main pipe and the vertical pipe, and the suspension member is passed between these brackets, and the front end of the carrier stay is attached to the bracket of the vertical pipe. By configuring the rear part of the carrier stay to be supported by the carrier back stay, the structure of the bicycle frame is simplified, reducing the number of man-hours for processing and assembly, as well as improving the strength and reducing the weight of the frame. The purpose of this invention is to provide a bicycle frame that is novel in design.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 7. In the figure, the same reference numerals as the above-mentioned reference numerals indicate equivalent parts.

In the present invention, in an H-shaped frame that connects a head pipe 1 and a vertical pipe 2 through a single main pipe 3, a bracket 9 is provided in the middle of the main pipe 3 to project upward, and a hollow cylindrical frame is provided. A bracket 10 is fixed to the rear part of the vertical pipe 2 by welding 11, and these brackets 9, 10
The middle hanging member 12 is stretched between them, and both ends of the middle hanging member 12 are fixed to the frame with bolts 13 and 14, respectively, and the front end of the carrier stay 15 is fixed to the bracket 10 with the bolt 14, The rear part of the carrier stay 15 is supported by a carrier back stay 16. Note that the carrier stay 15 is preferably made of a hollow pipe material.

What is shown in FIGS. 3 to 5 is the middle hanging member 12.
is formed into left and right halves, and an intermediate member 17 is inserted between them, and this intermediate member 17 is suitably made of an elastic body such as synthetic resin or rubber.

Further, in the embodiment shown in FIGS. 6 and 7, the upper part of the intermediate member 17 has a top lid 18 that can be opened and closed, and the inside of the middle hanging member 12 is hollow as shown in FIG. . In the figure, 18a is a hinge portion formed by partially reducing the wall thickness of the upper lid 18, 18b is a knob portion, and 18c is a projection portion for locking the lid.

As mentioned above, the frame of the present invention has the middle hanging member 1
2 and the carrier stay 15 share the connection part to the frame, the structure is simplified accordingly, reducing the number of man-hours for processing and assembly, and
In addition to reducing the weight of the frame, the main pipe 3
The strength of the frame can be improved by connecting the frame and the vertical pipe 2 in a truss-like manner via the hanging member 12.

Further, as shown in the drawing, if the middle suspension member 12 and the carrier stay 15 are arranged almost in a straight line,
It is also possible to provide a frame that is novel in design. As can be seen from Figure 2, the frame of the present invention is suitable for bicycles with small wheels.

Moreover, as shown in FIGS. 3 to 5, if an intermediate member 17 made of an elastic body is interposed in the middle hanging member 12,
It is easy to hold the handle when holding the handle, and there is no risk of injury. Furthermore, if the color tone of the intermediate member 17 is made different from that of the member 12, this intermediate member 17 becomes an accent, resulting in an excellent design.

Furthermore, in the case of the embodiments shown in FIGS. 6 and 7,
If the upper lid 18 is pulled up via the hinge portion 18a as shown by arrow B with the grip portion 18b, the upper lid 18
Since it opens, it is convenient to store small items such as the saddle cover 19 inside the middle suspension member 12.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a bicycle with a conventional center hanger, Fig. 2 is a side view of a bicycle using the frame of the present invention, and Fig. 3 is a perspective view of its main parts.
Figure 4 is a partial side view showing a part of it in cross section, Figure 5
The drawings are a cross-sectional view taken along the line AA in FIG. 4, FIG. 6 is a perspective view of a main part showing another embodiment, and FIG. 7 is a cross-sectional view of an inner hanging part thereof. 1...head pipe, 2...vertical pipe, 3...
Main pipe, 4...Chain stay, 5...Back hawk, 9, 10...Bracket, 11...Welding, 12...Hanging hand member, 13, 14...Bolt, 15...Carry stay, 16...Carriage Yabaku stay, 17... intermediate member, 18... top lid, 19... saddle cover.

Claims (1)

[Claims for Utility Model Registration] 1. In an H-shaped frame in which a head pipe and a vertical pipe are connected by one main pipe, a bracket is provided on the main pipe, a bracket is provided on the vertical pipe, and the frame is divided into left and right halves between these brackets. A bicycle in which the formed middle hanging member is passed over, an intermediate member is inserted between them, the front end of the carrier stay is fixed to the bracket of the vertical pipe, and the rear part of the carrier stay is supported by the carrier back stay. frame. 2. The bicycle frame according to claim 1, which is a registered utility model, wherein the upper part of the intermediate member is a top lid that can be opened and closed, and the inside of the middle hanging member is hollow.