JPH09301241A - Saddle seat structure for bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To locate the saddle seat of a bicycle in helt at a lower position than at in running, and prevent impact from a road from transmitting to the saddle seat during running. SOLUTION: The piston rod 6 of an air cylinder 4 fitted on a bicycle body 3 and a seat supporting shaft 2 are jointed. An opening/closing valve 9 is communicated with an air compression chamber 8 formed at the lower position of the piston rod 6 in the air cylinder 4 to open and close it freely. A saddle seat upward movement spring 7 which forces the piston rod 6 upwards is also formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle seat structure for bicycles and motorcycles, which holds the saddle seat at a low position when the motorcycle is stopped and raises the saddle seat during traveling to facilitate driving. Regarding

[0002]

2. Description of the Related Art As a saddle for a bicycle that moves up and down while traveling, Japanese Utility Model Laid-Open No. 3-75087 has been proposed. In this saddle, a hydraulic cylinder and a hydraulic cylinder are arranged in parallel and connected to each other by a pipe so that oil is stored in the lower part of the hydraulic cylinder and compressed air remains in the upper part thereof. Then, the saddle is fixed to the upper end of the piston rod of the hydraulic cylinder, a valve is provided between the hydraulic cylinder and the hydraulic cylinder, the valve is opened, and the saddle is raised by the expansion action of the compressed air in the hydraulic tank. Is. Further, by putting the driver's weight on the saddle in the open state, the air in the hydraulic cylinder is compressed to bring the saddle to the lowest position.

[0003]

However, such a bicycle saddle has a drawback that it requires a hydraulic cylinder and a hydraulic cylinder, the size of the device becomes large, and it is too large to be attached to the bicycle. Further, when the saddle is raised while the bicycle is running and the valve is closed to maintain the height, the seat support shaft of the saddle does not move in the vertical direction. Therefore, the bumps on the bicycle body due to the unevenness of the road surface are directly transmitted to the saddle, resulting in a bad riding comfort. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a compact, comfortable seat in which the impact of traveling is not applied to the saddle seat, and the following configuration is adopted to solve the problem.

[0004]

A saddle seat structure for a two-wheeled vehicle according to the present invention comprises a saddle seat body 1, a seat support shaft 2 projecting from a lower surface of the saddle seat body 1, and a shaft line of the seat support shaft 2. Air cylinder 4 provided in the two-wheeled vehicle main body 3 having a different axis, and the air cylinder 4
5 mounted on the piston 5 and a piston rod 6 connected to the piston 5, and the piston rod 6 so as to urge the piston rod 6 upward.
A saddle seat raising spring 7 connected to the air cylinder 4 and an air compression chamber 8 formed below the piston 5 in the air cylinder 4 are connected to each other, and the air compression chamber 8 and the outside are opened and closed to open and close. Valve 9 and connecting means 10 for connecting the piston rod 6 and the seat support shaft 2
And

Next, in the second aspect of the present invention, in the first aspect of the present invention, a communication passage 6b is provided inside the piston rod 6, and a lower end portion of the communication passage 6b communicates with the air compression chamber 8. At the same time, the upper end is connected to the on-off valve 9. Further, in a third aspect of the present invention according to the second aspect of the present invention, the piston rod 6 having a cross-section outer periphery other than a circular shape and the seat support shaft 2 are fixed in series, and the outer periphery of the piston rod 6 is A spring seat 12 having a detent hole 11 aligned with the outer periphery is penetrated in the air compression chamber 8, and the saddle seat raising spring 7 is interposed between the spring seat 12 and the piston 5. is there. In a fourth aspect of the present invention, in the first aspect of the present invention, the seat support shaft 2 is vertically movably fitted to a standpipe 13 of the motorcycle body 3, and the air cylinder 4 is arranged in parallel with the standpipe 13. Is fixed to the upright pipe 13, and the piston rod 6 and the seat support shaft 2 are connected to each other.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of a saddle seat structure for a motorcycle according to the present invention, and FIG. 2 is a schematic sectional view taken along the line II-II of FIG. In this example, the standing pipe itself, which is provided at the center of a motorcycle main body 3 made up of a bicycle, protrudes to form an air cylinder 4, and a piston 5 and a piston rod 6 are mounted in the air cylinder 4 and the piston rod 6 is attached to the piston rod 6. The seat support shaft 2 is fixed via the connecting means 10. The saddle seat body 1 is provided on the upper end of the seat support shaft 2. Air cylinder 4
The closing plate 22 is airtightly welded and fixed to the lower end portion thereof, and the spring seat 12 is welded and fixed to the intermediate portion near the lower end portion. As shown in FIG. 2, the spring seat 12 is formed in a rectangular shape with four corners protruding, and the four corners are welded and fixed to the inner circumference of the air cylinder 4. An air communication opening 19 is provided between the four sides other than the welded portion and the inner circumference of the air cylinder 4.
Are formed. At the center of the spring seat 12, there is provided a detent hole 11 consisting of a square opening, and a piston rod 6 having an outer circumference that matches the inner circumference thereof penetrates the detent hole 11 so as to be movable in the axial direction. .

The piston rod 6 is made of a tube having a square cross section, and a notch 12a is formed at the tip thereof. And
The piston 5 is integrally fixed to the outer circumference of the upper end of the piston rod 6, and an airtight O-ring 16 is fitted in one or more annular grooves formed on the outer circumference of the piston 5. And the saddle seat lifting spring 7 is the piston rod 6
It is attached to the outer circumference of the bottom of the piston 5 and the spring seat 12
Is interposed between the upper surface of the piston 5 and the upper surface of the piston 5 and urges the piston 5 upward. A lower end of a valve body 10a made of a circular pipe is fixed to the upper end of the piston rod 6 in a liquid-tight manner.
The lower end of the seat support shaft 2 is fixed to the outer periphery of the intermediate portion of a. The valve body 10a constitutes a connecting means 10 that connects the seat support shaft 2 and the piston rod 6.

A cap 23 is fixed to the upper end of the air cylinder 4, and the seat support shaft 2 penetrates through a circular hole of the cap 23 so as to be vertically movable. A lift stopper 24 is provided on the outer periphery of the lower end of the seat support shaft 2 so as to project. The upper end of the valve body 10a is closed, a through hole for the valve rod 26 is provided in the center thereof, and a valve seat is formed on the inner surface side of the closed end of the valve body 10a. An enlarged portion is formed at the lower end of the valve rod 26 to match the valve seat.
The lower end of the spring 16a is locked to the upper end of 26, and the upper end of the spring 16a is fixed to the upper end of the seat support shaft 2. Further, the upper end portion of the valve rod 26 is pivotally supported by one end of the lever 15, and the lever 15 loosely fits into the slit 25 of the seat support shaft 2 and penetrates therethrough. The intermediate portion of the lever 15 is the seat support shaft 2
The lever 15 is pivotally supported by a bracket 17 protrudingly provided on the lever, and the lever 15 is configured to be rotatable in the up-down direction about the pivotally-supported portion. The lever 15, the bracket 17, the valve rod 26, the connecting means 10 and the spring 16a constitute the on-off valve 9. Further, the spring 16a biases the valve rod 26 upward to maintain the upper end opening of the connecting means 10 in the closed state.
The on-off valve 9 is opened by rotating the lever 15 upward.

[0009]

[Other Embodiments] FIG. 3 differs from the structures of FIGS. 1 and 2 only in that the opening / closing operation of the opening / closing valve 9 is performed by a lever provided on the handle of the motorcycle. Next, FIG. 4 and FIG. 5 show still another example of the saddle seat structure of the motorcycle of the present invention, in which the air cylinder 4 is provided in parallel with the standing pipe 13 of the motorcycle main body 3. The seat support shaft 2 of the saddle seat body 1 is a vertical pipe of the motorcycle body 3.
Fits in 13 so that it can move up and down.
The air cylinder 4 is fixedly attached to 13. Then, the outer periphery of the upper end portion of the piston rod 6 is fixed to the seat support shaft 2 via the connecting means 10. A reinforcing pipe 6a is fixed to the outer periphery of the piston rod 6 inside the air cylinder 4, and a rising stopper 24 is provided at the upper end thereof. A saddle seat lifting spring 7 is interposed between the lower surface of the piston 5 and the closing plate 22 of the air cylinder 4. In this example, by rotating the lever 15, the air compression chamber 8 formed between the piston 5 and the closing plate 22 is openably and closably connected to the outside. Next, FIG. 6 shows another example of the saddle seat raising spring 7 in FIG. 5, and the saddle seat raising spring 7 of this example is composed of a spiral spring, and the height of the spring when compressed is reduced. The feature is that the length of the air cylinder 4 can be shortened accordingly.

[0010]

[How to use] In the example of FIGS. 1 and 2, the on-off valve 9 is closed when the motorcycle is running. In this closed state, the seat support shaft 2 is arranged so as to be slightly movable in the vertical direction. That is, the air inside the air compression chamber 8 is slightly compressed by the weight of the driver sitting on the saddle seat body 1. In addition, the impact force applied to the driver due to the unevenness of the road surface becomes a reaction force that pushes down the seat support shaft 2 to intermittently compress the air inside the air compression chamber 8 and restore it to the original state. It acts to reduce the impact force applied from the saddle seat body 1 to the saddle seat body 1. Next, when the traveling of the motorcycle is stopped by a signal or the like, the opening / closing valve 9 is lifted by lifting the lever 15 upward.
Release. Then, the seat support shaft 2 moves downward due to the weight of the driver applied to the saddle seat body 1.
Then, the lower end of the piston rod 6 contacts the closing plate 22, and the saddle seat body 1 is at the lowest position. The lower end of the piston rod 6 can be separated from the closing plate 22 by a certain distance by increasing the elastic force of the saddle seat raising spring 7.

Next, when the two-wheeled vehicle is run, the lever 15 is lifted upward and the on-off valve 9 is opened so that the weight of the driver is not applied to the saddle seat body 1.
Then, the seat support shaft 2 is raised by the elastic force of the saddle seat raising spring 7. And lift stopper
The seat support shaft 2 rises until 24 abuts on the cap 23. In this case, by adjusting the elastic force of the saddle seat raising spring 7, the raising stopper 24 is moved to the cap 23.
It is also possible to adopt a configuration in which the lifting of the seat support shaft 2 is stopped before the contact with the seat support shaft 2. In addition, in FIG. 3, the on-off valve 9 can be opened and closed by a lever attached to the handle. Further, in the example of FIGS. 4 and 5, the lever 15
Is projectingly provided on the front side of the two-wheeled vehicle, and the on-off valve 9 can be opened by pulling up the tip end thereof.

[0012]

According to the saddle seat structure of the motorcycle of the present invention, the saddle seat lifting spring 7 connected to the piston rod 6 allows the saddle seat body 1 to be lifted to a desired height through the opening / closing valve 9. Can be made. Next, by closing the on-off valve 9, the impact applied to the motorcycle main body 3 due to the unevenness of the road is absorbed by the air pressure in the air compression chamber 8 as an air cushion, and the impact can be prevented from being directly applied to the saddle seat body 1. . Then, by opening the opening / closing valve 9, the seat support shaft 2 can be pulled down against the elastic force of the saddle seat lifting spring 7 by the weight of the driver applied to the saddle seat body 1. This makes it possible to easily ground both feet of the driver on the road surface. When raising the saddle seat body 1, the waist should be lifted so that the weight of the driver does not rest on the saddle seat body 1. As described above, in the saddle seat structure for a two-wheeled vehicle according to the present invention, one air cylinder can serve both as the vertical movement of the saddle seat and as an air cushion, so that a saddle seat with a simple structure and a comfortable ride can be provided.

Next, in the second aspect of the present invention, a communication passage 6b is provided inside the piston rod 6, the lower end of the communication passage 6b communicates with the air compression chamber 8, and the upper end of the opening / closing valve 9 is connected.
Is connected to Therefore, the structure is extremely simple, and the opening / closing operation of the opening / closing valve 9 can be reliably performed. Next, in the third aspect of the present invention, the piston rod 6 and the seat support shaft 2 are fixed, and the lower outer circumference of the piston rod 6 is penetrated by a spring seat 12 having a rotation stop hole 11, and the spring seat 12 and the piston 5 are The saddle seat raising spring 7 is interposed between the two. Therefore, the structure is simple and the stability of the saddle seat body 1 is good. Furthermore, a fourth aspect of the present invention provides a seat support shaft 2
Is vertically movably fitted to the vertical pipe 13 of the motorcycle main body 3,
The air cylinder 4 stands in parallel with the standpipe 13.
It is fixed to 13 and the piston rod 6 and the seat support shaft 2 are connected. Therefore, the existing bicycle can be used as it is and the structure can be adopted.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a saddle seat structure for a motorcycle according to the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG.

FIG. 3 shows a second example of a saddle seat structure for a motorcycle according to the present invention.

FIG. 4 shows a third example of a saddle seat structure for a motorcycle according to the present invention.

FIG. 5 is an enlarged view of the relevant part.

FIG. 6 is a spring 7 for raising a saddle seat in FIG.
FIG. 6 is a vertical cross-sectional view of a main part showing another example.

[Explanation of symbols]

 1 Saddle seat body 2 Seat support shaft 3 Motorcycle body 4 Air cylinder 5 Piston 6 Piston rod 6a Reinforcing pipe 6b Communication passage 7 Saddle seat lifting spring 8 Air compression chamber 9 Open / close valve 10 Connecting means 10a Valve body 11 Rotation hole 12 Spring Seat 12a Notch 13 Standpipe 14 Fastener 15 Lever 16 O-ring 16a Spring 17 Bracket 19 Communication opening 20 Lower pipe 21 Reinforcement pipe 22 Closure plate 23 Cap 24 Lift stopper 25 Slit 26 Valve rod

Claims (4)

[Claims] 1. A two-wheeled vehicle body 3 having a saddle seat body 1, a seat support shaft 2 protruding from a lower surface of the saddle seat body 1, and an axis line parallel to the axis line of the seat support shaft 2. A cylinder 4, a piston 5 mounted on the air cylinder 4 so as to be movable up and down, a piston rod 6 connected to the piston 5, and a piston rod 6 connected to the piston rod 6 so as to urge the piston rod 6 upward. The saddle seat raising spring 7 and the air compression chamber 8 formed below the piston 5 in the air cylinder 4 are connected to each other.
A saddle seat structure for a two-wheeled vehicle, comprising: an opening / closing valve 9 that opens and closes between the vehicle and the outside, and a connecting means 10 that connects the piston rod 6 and the seat support shaft 2. 2. The communication passage 6b according to claim 1, wherein a communication passage 6b is provided inside the piston rod 6.
A saddle seat structure for a two-wheeled vehicle in which the lower end of the communication passage 6b is connected to the air compression chamber 8 and the upper end is connected to the opening / closing valve 9. 3. The piston rod 6 according to claim 2, wherein the cross-section outer periphery is formed in a shape other than circular.
And the seat support shaft 2 are fixed in series, and the outer periphery of the piston rod 6 thereof is aligned with the outer periphery of the detent hole 11
Is pierced in the air compression chamber 8 by a spring seat 12 having
A saddle seat structure for a two-wheeled vehicle in which the saddle seat lifting spring 7 is interposed between the spring seat 12 and the piston 5. 4. The seat support shaft 2 according to claim 1, wherein the seat support shaft 2 is vertically movably fitted to a standing pipe 13 of the motorcycle main body 3, and the air cylinder 4 and the standing pipe 13 are arranged in parallel with the standing pipe 13. A saddle seat structure for a two-wheeled vehicle, which is fixed to 13, and in which the piston rod 6 and the seat support shaft 2 are connected.