JP3872801B2 - Folding bike - Google Patents

Description

  The present invention relates to a folding bicycle.

Conventionally, there is a folding bicycle as shown in FIG. 6 (see, for example, Patent Document 1). When folding the folding bicycle, the frame 2 must be folded, the handle 12 folded, the saddle 7 removed, the wheels 15 and 16 removed, and so on. There was a problem that it could not be folded easily. In addition, carrying a folded bicycle is carried out by carrying it together with a bag or the like, and there is a problem that carrying a heavy bicycle requires a lot of labor.
JP 2004-58912 A

  The present invention has been made in view of the above-described conventional problems, and provides a folding bicycle that can be easily folded and can be carried in a folded state stably and easily with a small force. The issue is to provide.

  In order to solve the above problems, in the folding bicycle of the present invention, the handle 12 and the front wheel 15 are connected by the head lug 3, the saddle 7 and the rear wheel 16 are held by the main body frame 20, and the head lug 3 The lower part and the front end of the main frame 2 are rotatably connected, the rear end of the main frame 2 and the upper part of the main body frame 20 are rotatably connected, the main frame 2 is in a substantially vertical state, and the head lug 3 and the main body frame 20 are connected. Before the subframe 1 is constructed by hanging a saddle connecting rod 8 whose upper end is rotatably connected to a saddle 7 whose vertical position is adjustable. The sub-frame 1a, the center sub-frame 1b, and the rear sub-frame 1c are rotatably connected so that the sub-frame 1 can be bent. The front end of a and the upper part of the head lug 3 are rotatably connected, the rear part of the rear subframe 1c and the lower part of the saddle connecting rod 8 are rotatably connected, and the rear subframe 1c is rotatably connected to the main body frame 20. In addition, the central sub-frame 1b is connected to the main frame 2 so as to be rotatable.

  According to this, when the saddle 7 is pushed downward, the rear portion of the rear subframe 1c is pushed downward by the saddle connecting rod 8, and the front end of the rear subframe 1c is centered on the connection point to the main body frame 20. The rear sub-frame 1c is rotated upward together with the rear end of the central sub-frame 1b, and the rear sub-frame 1c is in a substantially vertical state. Accordingly, the front end of the central sub-frame 1b is the front sub-center with the connection point to the main frame 2 as the rotation center. The center sub-frame 1b and the front sub-frame 1a are turned downward together with the rear end of the frame 1a to be in a substantially vertical state, that is, the sub-frame 1 is bent, and the main frame 2 is brought into a substantially vertical state accordingly. The head lug 3 and the main body frame 20 are brought close to each other and the bicycle is folded. In this way, the bicycle is folded at once in conjunction with the pressing operation of the saddle 7, and the folding operation can be performed very easily. Further, when the head lug 3 and the main body frame 20 are folded close to each other, the front wheel 15 and the rear wheel 16 can roll to the ground in the front-rear position, so that the folded bicycle can be carried around the front wheel 15 and the rear wheel. The wheel 16 can be rolled to the ground and performed stably and with a small force.

It is also preferable that a clamp 11 is mounted on the rear portion of the rear subframe 1c so as to be slidable in the length direction, and the lower portion of the saddle connecting rod 8 whose length is adjustable is rotatably connected to the clamp 11. According to this, can enable the height adjustment clause of the saddle 7, also, it is possible to achieve a small type of the folded state.

Also, a plurality of through holes 27 are drilled at appropriate positions in the longitudinal direction in the rear part of the rear subframe 1c and in the lower part of the saddle connecting rod 8, respectively. It is also preferable that the through hole 27 is communicated and is connected rotatably by a fixing tool 28 such as a screw. According to this, a simple structure, can enable the height regulatory the saddle 7, also, it is possible to downsizing of the folded state.

  Further, it is preferable that the upper frame 4 constituting the upper part of the main body frame 20 is provided with a gripping portion 26 for gripping the folded bicycle horizontally. According to this, it is possible to easily carry a bicycle that is gripped by the grip portion 26 that is easy to grip.

  In the invention according to claim 1 of the present invention, the handle and the front wheel are connected by the head lug, the saddle and the rear wheel are held by the main body frame, the lower portion of the head lug and the front end of the main frame are rotatably connected, The rear end of the main frame and the upper part of the main body frame are rotatably connected, and the main frame is in a substantially vertical state so that the head lug and the main body frame are brought close to each other. The rear wheel is positioned so that it can roll in the front-rear position, the front wheel and the rear wheel roll on the ground, and it is possible to carry a bicycle that is folded with a stable and small force. In addition, the saddle connecting rod with its upper end rotatably connected to a saddle whose vertical position can be adjusted is suspended, and the sub-flex The front sub-frame, the center sub-frame and the rear sub-frame that constitute the system are rotatably connected so that the sub-frame can be bent, and the front end of the front sub-frame and the upper portion of the head lug are rotatably connected, and the rear sub-frame The rear part and the lower part of the saddle connecting rod are connected rotatably, the rear subframe is connected rotatably to the main body frame, and the center subframe is connected rotatably to the main frame. When pushed down, the sub-frame is bent, and the main frame is brought into a substantially vertical state accordingly, the head lug and the body frame are brought close to each other, and the bicycle is folded. Folds at once, making it very easy and fast to fold. Convenience of increased performance in accordance with the folding of the rolling vehicle is improved. The folded bicycle can be carried by rolling around the station yard like a carrier car, and it is very easy to fold and restore and can be cycled on the bicycle as soon as you get off the station. Therefore, it has the effect of being able to be used as a bicycle that can be easily brought wherever you go.

In addition to the effect of the invention of claim 1, the invention according to claim 2 is a saddle connection in which a clamp is slidably attached to the rear portion of the rear sub-frame in the length direction, and the length can be adjusted to the clamp. having connected the lower rod rotatably, it can enable the height adjustment clause saddle, also has the effect that it is possible to downsizing of the folded state.

In addition to the effect of the invention of claim 1, the invention according to claim 3 has a plurality of through-holes drilled at appropriate positions in the longitudinal direction at the rear part of the rear subframe and the lower part of the saddle connecting rod. The through-hole of the subframe and the through-hole of the lower part of the saddle connecting rod are connected to each other and rotatably connected with a fixing tool such as a screw, so the height of the saddle can be adjusted with a simple structure that can reduce the manufacturing cost. Ki de possible clauses, also has the effect that it is possible to downsizing of the folded state.

  In addition to the effect of the invention of claim 1, the invention according to claim 4 is provided with a grip portion for gripping the folded bicycle on the upper frame constituting the upper portion of the main body frame, so that it is easy to grip. A bicycle that is folded so as to have a bag can be easily carried, and the convenience of carrying the folding bicycle can be improved and the convenience can be improved.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. An example of an embodiment of the present invention is shown in FIGS. 1 and 2 show the usage state of the folding bicycle of this example, and FIGS. 3 and 4 show the folding state of the folding bicycle.

  The folding bicycle of this example (hereinafter abbreviated as “bicycle”) connects the handle 12 and the front wheel 15 with the head lug 3, holds the saddle 7 and the rear wheel 16 with the main body frame 20, The upper part of the main body frame 20 is connected to the main frame 2, and the front end of the main frame 2 is rotatably connected to the lower part of the head lug 3 (connection point b). The rear end is rotatably connected to the upper part of the main body frame 20 (connection point c), and the main frame 2 is brought into a substantially vertical state so that the head lug 3 and the main body frame 20 are brought close to each other to be folded. ing. It should be noted that the direction of rotation when referred to as being freely rotatable means the vertical direction unless otherwise specified. In addition, the bicycle of this example is provided with a sub-frame 1 that allows the bicycle to be folded by bringing the head lug 3 and the main body frame 20 close to each other with the main frame 2 in a vertical state in conjunction with the pushing operation of the saddle 7 downward. It has been. In other words, the bicycle of this example can be folded by a simple operation of pushing the saddle 7 downward. Details will be described below.

  The handle 12 includes a horizontal handle bar 19 that is gripped by the user and a handle post 13 that is integrally suspended from the center of the handle bar 19. A clamp 14 for fixing the handle post 13 is provided at the upper part of the head lug 3, and a front fork 21 for supporting the front wheel 15 rotatably is suspended from the lower part of the head lug 3. A handle post 13 having an appropriate length is inserted into the head lug 3 and fixed with a clamp 14 so that the height position of the handle 12 can be adjusted.

  The main body frame 20 includes a standing frame 22 into which a seat post 6 suspended from the saddle 7 is inserted, a rear fork 23 projecting obliquely rearward from an upper portion of the standing frame 22, A chain stay 24 that connects the lower part and the lower part of the rear fork 23, an upper frame 4 that projects forward from the upper part of the standing frame 22, and a frame stay that connects the lower part of the standing frame 22 and the front part of the upper frame 4. 5 is a skeleton that is assembled as a unit. The rear wheel 16 is pivotally supported at a connecting portion between the rear fork 23 and the chain stay 24, and a pedal 25 for driving the rear wheel 16 is rotatably provided below the standing frame 22. Note that members not directly related to the present invention, such as a chain for transmitting the rotation of the pedal 25 to the rear wheel 16, are omitted for convenience. Here, a clamp 9 for fixing the seat post 6 is provided at the upper end of the standing frame 22, and the saddle 7 can be secured by inserting the seat post 6 of an appropriate length into the standing frame 22 and fixing it with the clamp 9. The height position is adjustable. Further, the upper frame 4 is formed of a mountain-shaped bent pipe material whose central portion protrudes upward as compared with the rear end and the front end. A portion from the center portion of the upper frame 4 to the front end portion functions as a grip portion 26 described later, and the rear end of the main frame 2 is rotatably connected to the front end portion of the upper frame 4 (connection point c).

  A clamp 17 is attached to the upper end portion of the seat post 6, and the upper end of the saddle connecting rod 8 is rotatably connected to the clamp 17 (connection point h). The saddle connecting rod 8 is composed of two pipes having different diameters that can be put in and out, and the length thereof can be adjusted by tightening a clamp 10 provided at the center. The lower part of the saddle connecting rod 8 is rotatably connected to the rear part of the subframe 1 whose front end is rotatably connected to the upper part of the head lug 3 (connection point g).

  Here, the subframe 1 includes a front subframe 1a, a center subframe 1b, and a rear subframe 1c. The front subframe 1a, the center subframe 1b, and the rear subframe 1c are connected to each other so as to be rotatable, and the subframe 1 is bent. Thus, the subframe 1 that connects the upper part of the head lug 3 (specifically, the position above the connection point b of the main frame 2) and the lower part of the saddle connecting rod 8 is more specifically the front end of the front subframe 1a and the head lug 3. And the rear end of the front subframe 1a and the front end of the central subframe 1b are rotatably connected (connection point e), and the rear end of the central subframe 1b. The front end of the rear subframe 1c is rotatably connected (connection point f), and the rear portion of the rear subframe 1c and the lower portion of the saddle connecting rod 8 are rotatably connected (connection point g). The central portion of the rear subframe 1c is rotatably connected to the central portion of the frame stay 5 of the main body frame 20 (connection point d), and the central portion of the central subframe 1b is rotatable to the central portion of the main frame 2. Connected (connection point p). That is, the sub-frame 1 and the main frame 2 form an X-shaped frame that intersects in an X shape. Further, in this example, the connection to the rear portion of the rear sub-frame 1 c below the saddle connecting rod 8 is performed using the clamp 11. The clamp 11 is slidably attached to the rear portion of the rear subframe 1c in the length direction, and the lower portion of the saddle connecting rod 8 is rotatably connected to the clamp 11 (connection point g). Thus, the lower portion of the saddle connecting rod 8 is connectable to an appropriate position in the longitudinal direction of the rear portion of the rear subframe 1c.

  In the bicycle of this example having the above configuration, the bicycle can be folded by a simple operation of pushing the saddle 7 downward as described above. More specifically, when the saddle 7 is pushed down with its weight applied, the rear portion of the rear subframe 1c is pushed downward by the saddle connecting rod 8, and the rear subframe 1c is centered on the connection point d to the main body frame 20. The front end of the rear sub-frame 1b is rotated upward together with the rear end of the central sub-frame 1b so that the rear sub-frame 1c is in a substantially vertical state, and accordingly, the connection point p to the main frame 2 is the center of rotation of the central sub-frame 1b. The front end pivots downward together with the rear end of the front subframe 1a so that the central subframe 1b and the front subframe 1a are in a substantially vertical state, that is, the subframe 1 is bent up and down in a zigzag manner, and the main frame accordingly 2 lifts its rear end upward and becomes substantially vertical, whereby the head lug 3 and the main body frame 20 are brought close to each other, and the front wheel 15 and the rear wheel While ground and 6 to the ground is the bicycle is folded. In this way, the bicycle is folded at a time in conjunction with the pressing operation of the saddle 7, and the folding work can be performed very easily. In order to restore the folded bicycle to the use state, it is only necessary to pull the handle bar 19 forward to separate the head lug 3 and the main body frame 20 from each other. At this time, the subframe 1 moves in the opposite direction to that during folding. Then, the saddle 7 is lifted upward, and the bicycle is restored to the use state shown in FIGS. At this time, the saddle 7 is fixed by the clamp 9 so that the shape of the sub-frame 1 is maintained, and consequently the shape of the bicycle is maintained.

  Here, when the bicycle is folded, as shown in FIGS. 3 and 4, the head lug 3 and the main body frame 20 are close to each other, and the front wheel 15 and the rear wheel 16 are positioned so as to be able to roll on the ground. In the folded bicycle, the front wheel 15 and the rear wheel 16 are rolled to the ground, so that the bicycle can be stably carried with a small force. When the bicycle is folded, the main frame 2 is in a substantially vertical state with its rear end lifted upward, so that the main body frame 20 is inclined so that the front end of the upper frame 4 is located at the upper end. It is in a state. In the bicycle of this example, the front end portion of the upper frame 4 constitutes the grip portion 26, that is, the grip portion 26 is positioned at the upper end when the bicycle is folded. Specifically, the grip portion 26 is configured by a horizontal portion having a total length of about 10 cm in a state where the bicycle is folded. By providing the grip portion 26 that is easy to grip at the upper end of the folded bicycle in this way, the folded bicycle can be carried stably and easily by grasping the grip portion 26 that is easy to grip.

By the way, in the bicycle of this example, a clamp 11 is attached to the rear portion of the rear subframe 1c so as to be slidable in the length direction, and the lower portion of the saddle connecting rod 8 whose length is adjustable is rotatably connected to the clamp 11. by Ru Tei. Thus, in accordance with the physique of use for users A than can enable height regulatory saddle 7, it has been attempted to secure a comfortable usability. Further, the folded bicycle, miniaturization of the folding Ritatami state is achieved. If the handle post 13 is entirely inserted into the head lug 3 as shown in FIG. 4 or the pedal 25 is bent toward the left and right center side of the bicycle, the bicycle can be further miniaturized. In addition, it is preferable that the overall shape of the folded bicycle as shown in FIG. 4 is a small size close to a rectangle so that the folded bicycle can be easily wrapped with the cover 18. Further, as shown in FIG. 4, even when a folded bicycle is wrapped with the cover 18, if the grip 26, the front wheel 15, and the rear wheel 16 are projected outward from the cover 18, the bicycle can be carried. It is preferable because the front wheel 15 and the rear wheel 16 can be rolled stably on the ground by grasping the grip portion 26 that is easy to grip so as to have a hook.

  As described above, in the bicycle of this example, the bicycle is folded at a stroke in conjunction with the pressing operation of the saddle 7, so that the folding work can be performed very easily and in a short time. As a result, the convenience of folding bikes has improved. Further, in the folded state of the bicycle, the front wheel 15 and the rear wheel 16 are positioned so as to be able to roll in the front-rear position, and the grip portion 26 is provided. Therefore, the grip portion 26 that can easily carry the folded bicycle is provided. The front wheel 15 and the rear wheel 16 can be gripped and rolled to the ground stably and with a small force, so that the performance for carrying is improved and the convenience of the folding bicycle is improved. However, the folded bicycle can be carried by rolling around the station premises like a carrier car, and it is very easy to fold and restore, and you can cycle on the bicycle as soon as you get off the station, so it is very convenient Therefore, it can be used as a bicycle that you can easily bring anywhere you go.

FIG. 5 shows another example of the embodiment of the present invention. The folding bicycle of this example is different from the bicycle of the previous example only in the connection structure between the rear portion of the rear subframe 1c and the lower portion of the saddle connecting rod 8. Specifically, the saddle connecting rod 8 of this example is formed of a single pipe material or square member that cannot be expanded and contracted, and a plurality of through holes 27 are drilled at appropriate positions in the length direction below the saddle connecting rod 8. ing. A plurality of through holes 27 are also drilled at appropriate positions in the longitudinal direction at the rear portion of the rear subframe 1c. Then, an arbitrary through hole 27 at the bottom of the saddle connecting rod 8 and an arbitrary through hole 27 at the rear of the rear sub-frame 1c are communicated, and a fixing tool 28 such as a screw is inserted into each of the communicated through holes 27. By fixing, the lower part of the saddle connecting rod 8 and the rear part of the rear sub-frame 1c are rotatably connected (connection point g). According to this, as in the previous example, while ensuring a comfortable use property can enable the height regulatory the saddle 7, downsizing of the folded state is achieved. Moreover, since this example enables this with a simpler structure than the previous example, the manufacturing cost of the folding bicycle can be reduced.

It is a side view of the use condition of the folding bicycle of the example of an embodiment of the invention. It is a front view of the folding bicycle of FIG. It is a side view of the folding state of a folding bicycle same as the above. It is a front view of the folding state of a folding bicycle same as the above. It is a side view of the use condition of the folding bicycle of the other example of embodiment of this invention. It is a side view of the folding state of the folding bicycle of the example of background art.

Explanation of symbols

1 subframe 1a front subframe 1b center subframe 1c rear subframe 2 main frame 3 head lug 4 upper frame 5 frame stay 6 seat post 7 saddle 8 saddle connecting rod 9 clamp 10 clamp 11 clamp 12 handle 13 handle post 14 clamp 15 front Wheel 16 Rear wheel 17 Clamp 18 Cover 19 Handle bar 20 Main body frame 21 Front fork 22 Standing frame 23 Rear fork 24 Chain stay 25 Pedal 26 Grip part 27 Through hole 28 Fixing tool

Claims (4)

  The handle and the front wheel are connected by a head lug, the saddle and the rear wheel are held by the main body frame, the lower part of the head lug and the front end of the main frame are rotatably connected, and the rear end of the main frame and the upper part of the main body frame Is a foldable bicycle that can be folded by connecting the head lug and the main body frame close to each other with the main frame in a substantially vertical state, and its upper end can be freely rotated on a saddle with adjustable vertical position. The saddle coupling rod connected to the bottom is suspended, and the front subframe, the center subframe, and the rear subframe that constitute the subframe are rotatably connected so that the subframe can be bent. The front end of the front subframe and the top of the head lug And the rear subframe and the lower part of the saddle connecting rod are rotatably connected to the rear subframe. Together with rotatably connected to the body frame, folding bicycles, characterized in that connecting the central sub-frame rotatably on the main frame.   2. The folding according to claim 1, wherein a clamp is slidably attached to the rear portion of the rear subframe in the length direction, and a lower portion of a saddle connecting rod whose length is adjustable is rotatably connected to the clamp. Bicycle.   A plurality of through holes are drilled at appropriate positions in the longitudinal direction at the rear part of the rear subframe and the lower part of the saddle connecting rod, and the through holes of the optional rear subframe and the lower through hole of the saddle connecting bar are communicated with each other. The folding bicycle according to claim 1, wherein the folding bicycle is rotatably connected by a fixing tool such as.   2. The folding bicycle according to claim 1, wherein a grip portion for gripping the folded bicycle is provided horizontally on the upper frame constituting the upper portion of the main body frame.

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