JP2021172315A - Center stand and bicycle having the same - Google Patents

Abstract

To provide a center stand capable of highly precisely adjusting an angle when rising, and bicycle having the same.SOLUTION: A center stand 10 is fitted at the lower part of a bicycle. The center stand 10 includes a fitting part 1 fitted onto the bicycle. The bicycle and the fitting part 1 of the center stand 10 are connected through a fastening member 1a penetrating through a spherical washer 5 and a substantially central part of the spherical washer 5. Desirably, the center stand 10 may further include: a leg part 2 rotating between a rising position and a flip-up position; and a retaining part 1b including a rotation central axis extending in an orthogonal direction to a rotating shaft 2a of the leg part 2 and rotatably retaining the center stand 10 on the bicycle 100.SELECTED DRAWING: Figure 3

Description

The present invention relates to a center stand (hereinafter, also simply referred to as a "stand") and a bicycle provided with the center stand, and more particularly to a center stand capable of accurately adjusting an angle when standing up and a bicycle provided with the center stand.

Generally, a bicycle is provided with a stand for keeping the vehicle body upright when the bicycle is parked. The stand is often attached to the axle of the rear wheel. For example, a one-legged stand or a two-legged stand surrounding the rear wheel is widely known. In addition, in bicycles equipped with child seats and electrically power assisted bicycles, a center stand is also known, which is attached between the crank shaft and the rear wheel when the bicycle is viewed from the side, and the left and right legs are integrally molded.

As a technique related to the stand, for example, in Patent Document 1, the length of the leg can be adjusted by using a nut, and a side stand device for a two-wheeled vehicle prevents a direct impact from acting on the length adjusting mechanism when the stand is operated by the foot. Has been proposed. Further, Patent Document 2 proposes a bicycle stand vertical angle adjusting device capable of adjusting the angle of a stand by using an angle adjusting plate having a thin wall on one side and a thick wall on the other side. .. Specifically, this vertical angle adjusting device sandwiches the upper and lower sides of the horizontal frame between the upper plate and the lower plate in the vicinity of the pedal axis of the horizontal frame, and fixes the upper plate and the lower plate with bolts and nuts. At the time, the angle of the stand is adjusted by interposing an angle adjustment plate with a thin wall on one side and a thick wall on the other side through the bolt between the lower plate and the frame. ..

Jikkenhei 01-033486 Jikkensho No. 48-0222929

However, the two-wheeled vehicle side stand device proposed in Patent Document 1 is a one-legged stand, although the length of the legs can be adjusted, so that the device cannot be applied to the center stand. Further, the angle adjusting plate of the vertical angle adjusting device of the bicycle stand proposed in Patent Document 2 has a central square hole fitted on the square axis of the bolt so that the angle cannot be adjusted unless the angle adjusting plate is removed. It has become. Therefore, the angle of the angle adjusting plate is limited, and it is not possible to perform delicate angle adjustment.

Therefore, an object of the present invention is to provide a center stand capable of accurately adjusting the angle at the time of standing and a bicycle provided with the center stand.

As a result of diligent studies to solve the above problems, the present inventor has found that the above problems can be solved by setting the fastening member and the angle adjusting member for fastening the bicycle and the center stand to predetermined ones. , The present invention has been completed.

That is, the center stand of the present invention is a center stand attached to the lower part of the bicycle.
The center stand has a mounting portion to be attached to the lower portion of the bicycle, and the lower portion of the bicycle and the mounting portion of the center stand have a spherical washer and a fastening member penetrating a substantially central portion of the spherical washer. It is characterized in that it is connected via.

In the stand of the present invention, the center stand further extends between a leg portion that rotates between an upright position and a flip-up position and a rotation center axis that extends in a direction orthogonal to the rotation axis of the leg portion. It is preferable to have a holding portion that rotatably holds the center stand on the bicycle. In the bicycle of the present invention, it is preferable that the holding portion holds a portion of the bicycle extending in the front-rear direction.

The bicycle of the present invention is characterized by comprising the center stand of the present invention.

The bicycle of the present invention is suitable for a bicycle having a rear wheel diameter of 18 to 20 inches, and is particularly suitable for an electrically assisted bicycle.

According to the present invention, it is possible to provide a center stand capable of accurately adjusting the angle at the time of standing and a bicycle provided with the center stand. Since the center stand of the present invention is a double-legged center stand, it is suitable for a bicycle having a relatively large body weight such as an electrically assisted bicycle, a bicycle equipped with a child seat, and a bicycle carrying a heavy object.

It is a schematic perspective view of the state in which the leg portion of the center stand according to one preferred embodiment of the present invention is flipped up. It is an exploded perspective view of the center stand which concerns on one preferred embodiment of this invention. It is an exploded perspective view of the attachment part of the center stand which concerns on one preferred embodiment of this invention. It is a schematic side view of the bicycle which concerns on one preferred embodiment of this invention, and is the state which the center stand of this invention stands upright.

Hereinafter, the center stand of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a state in which the legs of the center stand according to the preferred embodiment of the present invention are flipped up, and FIG. 2 is a schematic perspective view of the center stand according to the preferred embodiment of the present invention. It is an exploded perspective view, FIG. 3 is an exploded perspective view of a mounting portion of a center stand according to one preferred embodiment of the present invention, and FIG. 4 is an exploded perspective view of a bicycle according to one preferred embodiment of the present invention. It is a schematic side view. In the explanation, when viewed from the driver sitting on the saddle 111, the front and rear (left and right in FIG. 4) are in the front and rear direction, the left and right (front and back sides of the paper in FIG. 4) are in the left and right direction, and the top and bottom (up and down in FIG. 4). ) Is described as the vertical direction.

The stand 10 of the present invention has a mounting portion 1 to be attached to the bicycle 100, and in the illustrated example, the leg portion 2 is rotatably attached to the mounting portion 1, and the leg portion 2 in the mounting portion 1 is attached. A lock portion 3 that holds (locks) the leg portion 2 in a flip-up state is rotatably attached to a position different from the above. The leg portion 2 is rotatable around the rotation shaft 2a, and the lock portion 3 is rotatable around the rotation shaft 3a. Further, in the illustrated example, the spring 4 which is a tension spring is formed between the spring mounting portion 3b provided on the upper side of the lock portion 3 and the spring mounting portion 2b provided at the substantially central portion of the leg portion 2. It is hung and both are connected. In the illustrated example, the lock portion 3 has a lever-shaped operation portion 3c, and the lock portion 3 is rotated by using the operation portion 3c.

As described above, the stand 10 of the present invention has a mounting portion 1 to be attached to the bicycle 100, and the mounting portion 1 is a fastening member 1a (bolt 1a in the illustrated example) for attaching the stand 10 to the lower portion of the bicycle 100. )have. Then, the stand 10 of the present invention is provided with a hole corresponding to the bolt 1a in a plate member fixed by sandwiching the chain stay 106 of the bicycle 100 from above and below, or in a mounting bracket fixed to the chain stay 106 by welding or the like. It is attached to the lower part of the bicycle 100 with bolts 1a.

In the stand 10 of the present invention, the fastening member 1a penetrates the spherical washer 5 composed of the concave washer 5a and the convex washer 5b, and the bicycle and the mounting portion 1 of the stand 10 are connected. That is, since the stand 10 of the present invention is attached to the bicycle via the spherical washer 5, the angle of the stand 10 can be adjusted more accurately than before. Further, the spherical washer 5 has an advantage that it is easily available because it is not a dedicated part like the angle adjusting plate proposed in Patent Document 2. In the illustrated example, two spherical washers 5 are provided, but in the stand 10 of the present invention, the number of spherical washers 5 may be one or two or more.

In the stand 10 of the present invention, as shown in the drawing, it is preferable that the lower portion of the bicycle and the mounting portion 1 are further mounted via a flat washer 6. That is, it is preferable that the fastening member 1a penetrates the flat washer 6 in addition to the spherical washer 5 between the lower part of the bicycle and the mounting portion 1. By arranging the flat washer 6 in this way, the height of the stand 10 (the distance between the upper surface of the mounting portion 1 and the lower surface of the mounting bracket, which will be described later) can be adjusted. In the stand 10 of the present invention, the number of flat washers 6 is not particularly limited, and the number of flat washers 6 may be used so as to have an appropriate height. In the illustrated example, three flat washers 6 are arranged above and below the spherical washers 5.

The stand 10 of the present invention further includes a rotation center axis extending in a direction orthogonal to the rotation axis 2a of the leg portion 2, and has a holding portion 1b that rotatably holds the center stand 10 on the bicycle. It is preferable to do so. As described above, the stand 10 of the present invention is connected to the lower part of the bicycle 100 by a fastening member 1a such as a bolt 1a, but when the stand 10 is attached to the lower part of the bicycle with only the fastening member 1a, the stand 10 is fastened. It may rotate around the member 1a. Therefore, it is preferable that the stand 10 of the present invention is provided with such a holding portion 1b to prevent the stand 10 from rotating around the fastening member 1a.

Further, as described above, the stand 10 of the present invention is attached to a plate member fixed by sandwiching the chain stay 106 of the bicycle 100 from above and below, or to a mounting bracket fixed to the chain stay 106 by welding or the like. The plate member or the mounting bracket is provided with, for example, a portion extending in the front-rear direction of the bicycle 100, and the holding portion 1b of the stand 10 holds this portion. The illustrated stand 10 can swing in the left-right direction of the bicycle 100 about the rotation center axis of the holding portion 1b, and can balance the left and right sides of the stand. The holding portion 1b may hold a portion of the plate member or the mounting bracket that extends in the front-rear direction of the bicycle 100, or may hold the chain stay 106.

Next, an embodiment in which the stand 10 is attached to the mounting bracket of the bicycle 100 will be described in detail. In adjusting the angle of the stand 10 with respect to the bicycle 100, first, the holding portion 1b of the stand 10 is attached to a portion of the mounting bracket extending in the front-rear direction of the bicycle. Then, a flat washer 6 and a spherical washer 5 are sandwiched between the mounting portion 1 of the stand 10 and the mounting bracket of the bicycle 100, and the distance between the upper surface of the mounting portion 1 and the lower surface of the mounting bracket is adjusted by the number of these. At this time, the flat washer 6 and the flat surface of the concave washer 5a are brought into contact with each other, and the concave spherical surface of the concave washer 5a and the convex spherical surface of the convex washer 5b are brought into contact with each other. To abut.

After that, the spherical washer 5 and the flat washer 6 are sandwiched between the head of the bolt 1a and the mounting bracket, and the bolt 1a is passed through the mounting portion 1, the spherical washer 5, and the flat washer 6. Then, the bolt 1a is fastened to the mounting portion 1. At this time, the flat surface of the mounting bracket and the flat surface of the convex washer 5b are brought into contact with each other, the convex spherical surface of the convex washer 5b and the concave spherical surface of the concave washer 5a are brought into contact with each other, and the flat surface portion of the concave washer 5a and the flat washer 6 are brought into contact with each other. Make a contact.

By attaching the stand 10 to the bicycle 100 in this way, even if there is an angle between the mounting portion 1 of the stand 10 and the mounting bracket of the bicycle 100 when the angle of the stand 10 when standing is adjusted. The concave spherical surface of the concave washer 5a and the convex spherical surface of the convex washer 5b allow an angle to be formed between the flat surface portion of the concave washer 5a and the flat surface portion of the convex washer 5b, whereby the respective flat surface portions come into contact with each other without a gap. can. Therefore, since the stand 10 can be securely fixed, the accuracy of the angle adjustment of the stand 10 can be improved. Then, by appropriately changing the numbers of the spherical washers 5 and the flat washers 6, the stand 10 swings in the left-right direction with respect to the bicycle 100 about the rotation center axis of the holding portion 1b, so that the stand 10 The angle of is able to be adjusted accurately.

The stand 10 of the present invention has a mounting portion 1 to be attached to the lower part of the bicycle, and the bicycle and the mounting portion 1 of the stand 10 have a spherical washer 5 and a fastening member 1a penetrating a substantially central portion of the spherical washer 5. It is only important to be connected via, and known configurations can be adopted for other configurations. In the stand 10 of the present invention, the spring 4 is attached to the leg 2 of the stand 10, and depending on the displacement of the spring 4 with respect to the rotation shaft 2a accompanying the rotation of the leg 2, either the flip-up position or the standing position is obtained. The legs 2 of the stand 10 may be fixed by the urging force of the spring 4, but as shown in the figure, the legs are not only the urging force of the spring 4 but also the legs when the legs 2 are upright and flipped up. A lock portion 3 for fixing the position of 2 may be provided. The stand 10 of the present invention may be a double-legged type as shown in the figure, but may be a single-legged type.

As shown in FIG. 2, the lock portion 3 of the stand 10 of the present invention opens upward toward the upper end side of the leg portion 2 in a state where the leg portion 2 is flipped up, and is concave downward. The concave portion 2d to be provided can be provided, the cam follower 3d can be arranged inside the lock portion 3, and the cam follower 3d can be engaged with and detached from the concave portion 2d. That is, when the operation unit 3c is rotated clockwise with the leg portion 2 flipped up, the cam follower 3d moves downward, and the cam follower 3d enters the recess 2d provided at the upper end of the leg portion 2. As a result, the rotation of the leg portion 2 is restricted, and the leg portion 2 can be prevented from rotating in the upright direction.

Next, the bicycle of the present invention will be described.
FIG. 4 is a schematic side view of a bicycle according to a preferred embodiment of the present invention, in which the center stand of the present invention is erected. The bicycle 100 of the present invention includes the stand 10 of the present invention. In the bicycle 100 of the present invention, by using the stand 10 of the present invention as a double-legged stand, a bicycle having a relatively large body weight such as an electrically assisted bicycle, a bicycle equipped with a child seat, and a bicycle loaded with heavy objects. Etc. can be parked in a stable state.

In the illustrated bicycle 100, the body frame 102 includes a head tube 103, a down tube 104 extending diagonally downward from the head tube 103, a seat tube 105 extending diagonally upward from the rear end of the down tube 104, and a seat tube 105. A pair of left and right chain stays 106 extending rearward from the vicinity of the lower end of the chain stay 106, and a pair of left and right seat stays 107 for connecting the rear ends of both chain stays 106 and the upper portion of the seat tube 105 are provided. A front fork 108 extending diagonally forward and downward is provided at the lower end of the head tube 103, and a front wheel 109 is rotatably attached to the lower end of the front fork 108. A handle 110 is attached to the upper end of the head tube 103, and a saddle 111 is attached to the upper end of the seat tube 105. Further, a rear wheel 112 is rotatably attached to the rear end portion of the chain stay 106.

The bicycle 100 of the present invention includes the center stand 10 of the present invention under the body frame 102. As long as the stand 10 of the present invention is attached to the lower part of the bicycle 100, there is no particular limitation on the front and rear positions thereof. Preferably, when the bicycle in which the stand 10 is in an upright position is viewed from the side, the center of gravity of the bicycle 100 is in front of the vertical line passing through the ground contact portion of the stand 10. By attaching the stand 10 to such a position, the front wheel 109 comes into contact with the ground when the bicycle is parked, and the bicycle can be parked in a stable state. The mounting position of the center stand 10 is D1 / when the horizontal distance from the axle of the front wheel 109 to the mounting position of the stand 10 is D1 and the horizontal distance from the mounting position of the stand 10 to the axle of the rear wheel 112 is D2. D2 is in the range of 2.9 to 4.0. By satisfying such conditions, it is possible to park the bicycle in a more stable state, and it is possible to prevent the stand 10 from interfering with the crank 113 and the pedal while the bicycle is running.

Further, in the illustrated bicycle, the child seat 115 is attached to the rear carrier 114, but a child seat (front child seat) may also be attached to the handlebar and the handle stem so that two children can be carried. The illustrated bicycle 100 has a structure in which the rear wheels 112 have a smaller diameter than the front wheels 109, and the burden of loading and unloading a child on the attached child seat 115 is reduced. Further, since the rear wheel 112 has a small diameter, the rear wheel 112 side has a low center of gravity, and it is possible to prevent wobbling during traveling. Further, where it is necessary to keep the total length of the bicycle 100 in the front-rear direction to be less than the legal length, by reducing the diameter of the rear wheel 112, the distance from the front end of the rear wheel 112 to the rotation center of the crank 113 is increased. doing. As a result, the degree of freedom of installation regarding the mounting position of the stand 10 is improved.

Further, in the illustrated bicycle 100, the diameter of the front wheel 109 is larger than the diameter of the rear wheel 112. By making the front wheel 109 larger in diameter than the rear wheel 112, the step running performance is improved, and by making the front wheel 109 larger in diameter, the distance between the pedal and the child seat is improved even when the front child seat is attached. Because of the wider size, even a large user will not have his feet in contact with the front child seat when pedaling, improving driving comfort. Further, by making the front wheel 109 a large diameter, the user's choices will increase in terms of design. In the bicycle 100 of the present invention, the diameter of the rear wheel 112 is preferably 18 to 20 inches. In the bicycle 100 of the present invention, the front wheel 109 is preferably 24 inches or less. Although not shown, the bicycle on which a heavy object is loaded is the type shown in FIG. 4, and the heavy object is loaded on the upper part of the rear wheel 112 in the horizontal portion of the rear carrier 114 instead of the child seat 115. An example is a bicycle with a luggage basket installed.

In the bicycle 100 of the present invention, when the driver steps on the pedal with his / her foot to rotate the crank 113, the main driving force is transmitted by a power transmitting means such as a chain or a belt, and the driving force is transmitted to the rear wheels 112. Therefore, the rear wheels 112 are configured to be driven. In the illustrated bicycle, a motor 116 is provided on the front wheel 109, and the battery 117 that supplies electric power to the motor 116 can be detachably attached to the rear of the seat tube 105. Further, inside the electric motor 116, an electric motor that supplies an auxiliary driving force to the front wheels 109 can be arranged. Therefore, by arranging the electric motor on the front wheel 109, the heavy electric motor including the magnet and the coil is arranged on the front side of the bicycle 100, so that the center of gravity can be further on the front side.

1 Mounting part 1a Fastening member 1b Holding part 2 Leg part 2a Rotating shaft 2b Spring mounting part 2d Recessed 3 Locking part 3a Rotating shaft 3b Spring mounting part 3c Operation part 3d Cam follower 4 Spring 5 Spherical washer 5a Concave washer 5b Convex washer 6 Flat washer 10 Center stand (stand)
100 Bicycle 102 Body frame 103 Head tube 104 Down tube 105 Seat tube 106 Chain stay 107 Seat stay 108 Front fork 109 Front wheel 110 Handle 111 Saddle 112 Rear wheel 113 Crank 114 Rear carrier 115 Child seat (rear child seat)
116 Motor 117 Battery

Claims (6)

At the center stand attached to the bottom of the bicycle
The center stand has a mounting portion to be attached to the lower portion of the bicycle, and the lower portion of the bicycle and the mounting portion of the center stand have a spherical washer and a fastening member penetrating a substantially central portion of the spherical washer. A center stand characterized by being connected via. The center stand further
The legs that rotate between the standing position and the flip-up position,
A holding portion having a rotation center axis extending in a direction orthogonal to the rotation axis of the leg portion and holding the center stand rotatably on the bicycle.
The center stand according to claim 1. The center stand according to claim 2, wherein the holding portion holds a portion of the bicycle extending in the front-rear direction. A bicycle comprising the center stand according to any one of claims 1 to 3. The bicycle according to claim 4, wherein the diameter of the rear wheel is 18 to 20 inches. The bicycle according to claim 4 or 5, which is an electrically assisted bicycle.

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