JPH051683U - bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] To make the lower pipe of the bicycle expandable and contractible for compactness. [Configuration] The lower pipe 7 is divided into a front pipe 12 and a rear pipe 13, the front pipe 12 has a smaller diameter than the rear pipe 13, and the front pipe 12 is inserted into the rear pipe 13. An engaging plate 14 is fitted to the tip of the front pipe 12, and the rear pipe 13
An engagement ring 15 is provided inside the tip, and a tightening fitting 16 for reducing the diameter of the rear pipe 13 is provided on the outer periphery of the tip of the rear pipe 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This device is a self-rotating device that can be expanded and contracted over its entire length for convenient carrying and storage. Regarding cars

[0002]

[Prior art]

  Folding bicycles have been used as convenient bicycles for carrying and storing. This fold As shown in FIG. 5, the folding bicycle has a head pad that supports the handle shaft 1 and the front wheel 2. A lower pipe 7 that connects the ip 3 and a stand pipe 6 that supports the saddle 4 and the rear wheel 5. It is divided into two parts and hinged with a hinge plate 8. Open the hinge 7 when carrying or storing. Fold the frame, and close the hinge 7 to extend and fix the frame when using. It

[0003]

[Problems to be solved by the device]

  However, with the above, when folded, the overall length becomes shorter, but the width becomes thicker. For example, when you put it in the trunk of a car, it may be bulky and other luggage may not fit in. is there.

[0004]   Therefore, the problem of this invention is to reduce the total length when carrying or storing without increasing the width and thickness. Comb is more compact than the conventional one.

[0005]

[Means for Solving the Problems]

  In order to solve the above problems, a head pipe and a stand pipe supporting a handle shaft The lower pipe connecting the and is divided into front and rear, and the divided front and rear lower pipes can be expanded and contracted. The connection was made.

[0006]   It is also possible to have a handle rotatably attached to the above handle shaft. It

[0007]

[Action]

  In a bicycle constructed in this way, the divided lower pipe is Shrink to shorten the overall length. On the other hand, at the time of use, extend the contracted lower pipe, Return to the original length and use.

[0008]   Also, if the handle is rotatable, the handle can be Rotate horizontally or vertically so that it is parallel to the front wheels to reduce the protrusion in the width direction.

[0009]

【Example】

  An embodiment of the present invention will be described below with reference to FIGS.   As shown in FIG. 1, the frame of this bicycle has a head pipe 3 and a stand pipe 6. A front fork that supports the front wheel 2 on the head pipe 3 by connecting the lower pipe 7 and 9 is inserted, and the standpipe 6 is fitted with a rear hawk 10 for supporting the rear wheels and a tune. The stay 11 is joined.

[0010]   On the other hand, the lower pipe 7 is divided into a front pipe 12 and a rear pipe 13, and the front pipe 1 2 has a smaller diameter than the rear pipe 13. This front pipe 12 is shown in FIG. As shown in FIG. An engagement plate 14 having an outer diameter slightly smaller than the inner diameter is fitted. Also the rear pipe 1 The inside of the tip of No. 3 has an inner diameter almost the same as the outer diameter of the front pipe 12 and is partially opened. An engagement ring 15 is provided. The engaging plate 14 and the engaging ring 15 are paired with each other. The facing surfaces are provided with teeth, which mesh with each other when the engagement ring 15 contracts in diameter. It is like this.

[0011]   On the outer periphery of the front end of the rear pipe 13, there is an opening in the axial direction as shown in FIG. Tightening fittings 16 are attached. This metal fitting 16 is provided on the brim of the opening. The diameter of the lever 17 is reduced by rotating the lever 17, and the outer circumference of the engagement ring 15 is tightened. The engagement ring 15 is held in a state of being engaged with the engagement plate 14, and the rear pipe 13 and the front pipe are 12 and fixed. The method of fixing the front pipe 12 and the rear pipe 13 is as described above. However, the rear pipe 1 is not limited to the one shown in FIG. The fixing pin 18 screw-engaged with 3 is attached to the back surface of the engagement ring 15 that engages with the engagement plate 14. You may make it engage.

[0012]   In addition, the handle shaft 1 rotatably supported by the head pipe 3 has a handle As shown in FIG. 3, the dollar 19 has the same structure as the tightening fitting 16 of the rear pipe 13. It is attached with the metal fittings 20, and the metal fittings 20 are attached by the levers 21 of the metal fittings. When tightened, the metal fitting contracts in diameter, and the handle 19 is fixed to the handle shaft 1 and conversely loosened. It becomes rotatable and can be rotated until it is parallel to the front wheel 2. There is.

[0013]   This embodiment is configured as described above, for example, when carrying this bicycle. When storing or storing, loosen the lever 17 of the clamp 13 at the end of the rear pipe 13 Push the pipe 12 into the rear pipe 13 to reduce the total length of the bicycle. At the same time, Han Loosen the lever 21 of the tightening bracket 20 of the dollar 19 and move the handle 19 parallel to the front wheel 2. Rotate until When using it, pull the front pipe 12 from the rear pipe 13. The engaging plate 14 and the engaging ring 15 are engaged with each other, and the lever 17 of the tightening fitting 16 is engaged. Tighten the handlebar and rotate the handlebar 19 so that it is orthogonal to the front wheel 2 and Tighten and fix the lever 21 of the tightening fitting 20 of 9.

[0014]   In this way, this bicycle can be shortened without increasing the width and thickness, Always be compact.

[0015]   FIG. 4 shows another connection example of the front pipe 12 and the rear pipe 13. In this example, A groove 22 is provided in the front pipe 12, and a screw 23 whose tip reaches the groove 22 is attached to the rear pipe 1. 3 is provided, and the engaging plate, the engaging ring, and the fixing metal fitting are not used.

[0016]

【effect】   Since this invention is constructed as described above, the total length of the bicycle can be made small without increasing the width and thickness. Wear. For this reason, it can be made more compact than conventional folding bicycles, and can be carried and stored. It is convenient for

[Brief description of drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partially enlarged sectional view of FIG.

FIG. 4 is a partial perspective view of another embodiment.

FIG. 5 is an operation diagram of a conventional example

[Explanation of symbols]

1 handle shaft 3 head pipe 6 Standpipe 7 Lower pipe 19 handle

Claims (2)

[Scope of utility model registration request] 1. A bicycle in which a lower pipe connecting a head pipe supporting a handle shaft and a stand pipe is divided into front and rear parts, and the divided front and rear lower pipes are elastically connected. 2. The bicycle according to claim 1, wherein a handle is rotatably attached to the handle shaft.