JPH076073U - Bicycle slide frame - Google Patents

Abstract

(57) [Summary] [Purpose] The overall structure is compact with a simple handle structure that prevents the frame from twisting and bending. [Structure] The bicycle frame 2 includes a front hawk 6, a head pipe 5, a handle post 20, an upper pipe 8, a lower pipe 9, a stand pipe 11, and a main frame 12. The front hawk 6 supports the front wheel 3. Head pipe 5
Rotatably supports the front fork 6. The handle post 20 is rotatably supported by the head pipe 5 together with the front fork, and has a bent portion 22 in the middle thereof. The upper pipe 8 and the lower pipe 9 are fixed to the head pipe 5 so as to be arranged in parallel vertically. The upper end of the standpipe 11 supports the saddle 10. The main frame 12 is a vertical pipe 1
1 and the upper pipe 8 and the lower pipe 9 are slidably fixed, and the rear wheel 4 is supported at the rear end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide frame, and more particularly, to a bicycle slide frame that can change a distance between a front wheel and a rear wheel.

[0002]

[Prior art]

 There is a bicycle disclosed in Japanese Examined Patent Publication No. 52-14500 as a bicycle that has a compact appearance by shortening the distance between the front wheel and the rear wheel during storage or transportation. This bicycle has a main guide pipe that supports a drive mechanism such as a drive gear and a rear wheel, a main frame that is slidably fitted to the main guide pipe and that supports a front wheel, and a main guide frame and a main frame, respectively. It is provided with a guide pipe in which a saddle support pipe and a pair of handle pipes are slidably fitted. In addition, between the handle pipes, a connecting member for rotatably holding both handle pipes is provided, and at a corresponding portion of each handle pipe, a pair of flanges for restricting the position of the connecting members are provided respectively. ing. Further, fixing means are provided at the sliding portions between the main guide pipe and the main frame, the supporting pipes of the saddle, and the sliding portions of the handle pipe with the respective guide pipes.

In this bicycle, the handle pipe, the saddle support pipe, and the lateral main frame are slidable relative to the respective guide pipes and can be fixed at arbitrary positions, so that the height of the saddle and the handle can be improved. , The distance between the saddle and the steering wheel (the distance between the front and rear wheels) can be adjusted almost steplessly so that it can be in a compact posture during storage and transportation.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional structure, two handle pipes are required in the handle portion in order to avoid interference with the front wheels, so that the structure of the handle portion is complicated and its adjustment is also complicated. In addition, since the main pipe and the main guide pipe are composed of a single pipe, the positional relationship around their axes is not fixed, and the positional relationship may shift during sliding and the frame may be twisted. Moreover, since the load is supported by the single main pipe and the main guide pipe, the rigidity of the frame is low, and the main frame may be bent due to the load.

An object of the present invention is to make the entire frame compact with a simple handle structure in which the frame is less likely to be twisted and bent.

[0006]

[Means for Solving the Problems]

 The bicycle slide frame according to the present invention includes a front hawk, a head pipe, a handle post, an upper pipe, a lower pipe, a stand pipe, and a main frame. The front hawk supports the front wheels. The head pipe rotatably supports the front fork. The handle post is rotatably supported by the head pipe together with the front fork, and has a bent portion in the middle. The upper pipe and the lower pipe are fixed to the head pipe side by side in parallel with each other. The upper end of the standpipe supports the saddle. The main frame has a standpipe, an upper pipe, and a lower pipe slidably fixed to each other, and a rear end thereof supports a rear wheel.

[0007]

[Action]

 In the bicycle slide frame according to the present invention, the upper pipe, the lower pipe, and the vertical pipe are slid in the main frame and the handle post is bent at the bent portion during storage or transportation. Thereby, the whole can be made compact. Moreover, since the upper pipe and the lower pipe are arranged, twisting is unlikely to occur between the upper pipe and the lower pipe and the main frame. In addition, the upper and lower pipes are fixed in parallel with each other, so they are strong against the load from above. Therefore, it has high rigidity and is hard to bend. Furthermore, the structure of the handle post is simple because it is only necessary to bend the handle post.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a bicycle 1 according to an embodiment of the present invention includes a frame 2, a front wheel 3 supported on a front portion of a frame 2, and a rear wheel supported on a rear portion of the frame 2. It is mainly composed of four. The frame 2 includes a head pipe 5, a front hawk 6 that is rotatably supported by the head pipe 5, supports the front wheel 3, and a handle portion that is connected to the front hawk 6 and is rotatably supported by the head pipe 5. 7, the upper pipe 8 and the lower pipe 9 which are vertically arranged on the head pipe 5 and fixed in parallel, the stand pipe 11 supporting the saddle 10, and the stand pipe 11, the upper pipe 8 and the lower pipe 9 can slide. The main frame 12 is fixed to.

The handle portion 7 has a handle post 20, a handle 21 fixed to an upper end of the handle post 20 so as to be rotatable about a horizontal axis, and a bent portion 22 arranged in the middle of the handle post 20. ing. As shown in FIG. 3, the handle post 20 has an upper handle post 23 and a lower handle post 24 supported by the head pipe 5. A bent portion 22 is arranged between the upper handle post 23 and the lower handle post 24. The bent portion 22 includes an upper hinge 25 fixed to the lower portion of the upper handle post 23 in a slidable and rotatable manner, a lower hinge 26 screwed to the upper end of the lower handle post 24, and both hinges 25, 26. It comprises a support shaft 27 for rotatably supporting, a sleeve 28 for linearly connecting both hinges 25, 26, and a spring 29 for urging the sleeve 28 downward. The spring 29 is arranged in a compressed state between the lower end of the lower handle post 23 and the upper end of the sleeve 28.

As shown in FIG. 4, on the lower peripheral surface of the upper hinge 25, there is formed a taper portion 30 whose diameter gradually increases as it goes downward. Levis 31 are in a row. A fixing bolt 32 is arranged between the double clevis 31 and along the center axis of the upper hinge 25. As shown in FIG. 3, a taper nut 33 is fastened to the upper end of the fixing bolt 32. The taper nut 33 is for fixing the upper hinge 25 to the upper handle post 23 by expanding the upper end of the upper hinge 25 and pressing the upper hinge 25 against the inner surface side of the upper handle post 23.

Further, on the inner peripheral surface of the sleeve 28 facing the taper portion 30, there is formed an enlarged diameter portion 34 whose inner diameter gradually increases as it goes downward. At the upper end of the lower hinge 26, a single clevis 35 connected to the double clevis 31 by a support shaft 27 is formed. A male screw 36 is formed on the outer peripheral surface of the upper end of the lower handle post 24, and a female screw 37 that is screwed into the male screw 36 is formed on the inner peripheral surface of the lower end of the sleeve 28.

In the handle post 20 thus configured, the sleeve 28 is rotated to release the fastening between the male screw 36 and the female screw 37, and the sleeve 28 is lifted upward against the urging force of the spring 29. Then, the upper handle post 23 and the lower handle post 24 can be bent at the bent portion 22. Further, when the sleeve 28 is rotated and the male screw 36 and the female screw 37 are fastened in a state where the upper handle post 23 and the lower handle post 24 are linearly arranged, the taper portion 30 and the enlarged diameter portion 34 are engaged with each other as they are fastened. The upper handle post 23 is fixed to the lower handle post 24 without rattling.

The upper pipe 8 is composed of two pipes 40 and 41 that expand and contract in the axial direction. One end of the pipe 40 is welded and fixed to the head pipe 5. The pipe 41 has a diameter larger than that of the pipe 40, and slidably fixes the other end of the pipe 40. As shown in FIG. 2, the stand pipe 11 has a structure in which a flat plate is bent into an inverted U shape, and the saddle 10 is fixed to the bent portion at the upper end thereof.

The main frame 12 has a configuration in which two flat plate members 12a and 12b are arranged in parallel. Stand guide portions 42 for slidably supporting the stand pipe 11 are disposed on both sides of the main frame 12. A lock part 43 for fixing the stand pipe 11 is arranged in the stand guide part 42. Further, between the flat plate members 12a, 12b of the main frame 12, horizontal guide portions 44, 45 for horizontally slidably supporting the pipe 41 of the upper pipe 8 and the lower pipe 9, respectively, are arranged vertically. It Locking portions 46, 46 are also arranged on these horizontal guide portions 44, 45. Further, a hanger portion 50 is arranged at the lower center of the main frame 12. A gear crank 51 having a pedal 52 attached to the tip thereof is rotatably supported on the hanger portion 50. The pedal 52 can be folded inward by a folding mechanism (not shown). A rear wheel 4 is supported at the rear end of the main frame 12.

As shown in FIG. 5, the lock portion 43 includes a bracket 53 arranged so as to wind the two vertical guide portions 42, an eccentric cam 54 supported on one end side of the bracket 53, and an eccentric cam 54. And a lever 55 for rotating 180 degrees. The eccentric cam 54 is a member for pressing the standpipe 11 against the side surface of the stand guide portion 42. The eccentric cam 54 enables the vertical pipe 11 to slide up and down when the distance from the center of the eccentric shaft to the peripheral surface is arranged at the shortest, and when it is arranged 3 to 6 ° in front of the maximum displacement, The vertical pipe 11 is pressed against the vertical guide portion 42 to lock the vertical pipe 11.

As shown in FIG. 6, the lock portions 46 arranged on the horizontal guide portions 44 and 45 also have the same structure, and the bracket 56 fixed around the horizontal guide portion 44 and the bracket 56. It has an eccentric cam 57 which is supported so as to be rotatable 180 ° and a lever 58 for rotating the eccentric cam 57 by 180 °. In the lock portion 46 as well, the lever 58 is similarly rotated to press and lock the upper pipe 8 and the lower pipe 9 against the guide portions 44 and 45.

In the bicycle 1 configured in this way, when riding, the lock 43 of the stand pipe 11 is temporarily released and the stand pipe 11 is extended upward. Further, the handle 21 is fixed at a predetermined position. Further, the handle post 20 is linearly fixed by screwing the sleeve 28 into the lower handle post 24. Then, the upper pipe 8 and the lower pipe 9 are extended to a predetermined position and locked.

On the other hand, when storing, the locks of the upper pipe 8 and the lower pipe 9 are released, and the upper pipe 8 and the lower pipe 9 are contracted leftward in FIG. Then, the front wheels 3 and the rear wheels 4 move toward each other. At this time, since the front wheel 3 and the rear wheel 4 are in contact with the ground, the front wheel 3 and the rear wheel 4 can expand and contract in the grounded state. Therefore, the frame 2 can be easily folded without lifting. Then, the lock 43 is released and the standpipe 11 is moved downward to place the saddle 10 on the main frame 11. Further, the handle 21 is rotated downward. Finally, the handle post 20 is bent at the bent portion 22. At this time, the sleeve 28 is rotated to release the fastening of the sleeve 28, and the upper handle post 23 is bent with respect to the lower handle post 24. Then, it can be folded compactly as shown in FIG. Since the upper pipe 8 expands and contracts in two steps, the folded rear ends of the upper pipe 8 and the lower pipe 9 do not project to the rear of the handle 21 in the stored state.

Since the upper pipe and the lower pipe are provided here, the rigidity is high. Further, since the handle portion 7 has a bent structure instead of sliding, the handle structure is simplified and can be easily and compactly folded. Further, since the standpipe 11 is slidably fixed, the height of the standpipe can be reduced, and the bicycle 1 can be made compact as a whole.

Further, since the upper handle post 23 and the lower handle post 24 are firmly fixed by the engagement of the tapered portion 30 and the enlarged diameter portion 34, the handle post 20 does not rattle when extended.

[0021]

[Effect of device]

 In the slide frame according to the present invention, the upper pipe and the lower pipe and the vertical pipe are slidably fixed to the main frame, so that the frame has high rigidity and is less likely to be bent or twisted, and can be stored compactly. Further, since the handle post has a bent portion, the structure of the handle post can be simplified and the handle post can be folded compactly. For this reason, it becomes compact as a whole.

[Brief description of drawings]

FIG. 1 is a side view of a bicycle adopting an embodiment of the present invention.

FIG. 2 is a front view of the line II-II.

FIG. 3 is an enlarged sectional partial view of a handle post.

FIG. 4 is an enlarged cross-sectional view of a bent portion.

FIG. 5 is an enlarged side view of a lock portion.

FIG. 6 is an enlarged cross-sectional view of a lock portion.

FIG. 7 is a side view showing a posture during storage.

[Explanation of symbols]

 1 Bicycle 2 Frame 3 Front Wheel 4 Rear Wheel 5 Head Pipe 6 Front Hawk 7 Handle Part 8 Upper Pipe 9 Lower Pipe 10 Saddle 11 Stand Pipe 12 Main Frame 20 Handle Post 22 Bent Part 42 Stand Guide Part 43, 46 Lock Part 44, 45 Horizontal guide section

Claims (1)

[Scope of utility model registration request] 1. A front fork supporting a front wheel, a head pipe rotatably supporting the front hawk, a handle post rotatably supported by the head pipe together with the front hawk, and having a bent portion in the middle thereof. An upper pipe and a lower pipe fixed in parallel to each other on the head pipe in a vertical direction, a stand pipe having an upper end supporting a saddle, the stand pipe, and the upper pipe and the lower pipe are slidably fixed. , A bicycle slide frame equipped with a main frame which supports a rear wheel at a rear end thereof.