JP2021000947A - Damping force generating device and bicycle parking stand - Google Patents

Abstract

To provide a damping force generating device that can be used as a parking bicycle stand excellent in safety and a component thereof.SOLUTION: A parking bicycle stand 10 includes a fixation member 20, a support part 30 disposed movable to the fixation member 20 to support a bicycle 12, and a housing mechanism 40 allowing the support part 30 to be stored in the fixation part 20 so as not to protrude outward. The housing mechanism 40 includes a housing speed changing part 44 configured to change speed for housing the support part 30. The support part 30 jumps up when the bicycle 12 is removed, and the housing speed changing part 44 changes the jumping up speed of the support part 30 from a first speed V1 to a second speed V2 higher than the first speed V1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a damping force generator and a bicycle parking stand.

Patent Document 1 describes a bicycle parking device having a configuration that can be easily and independently installed and can be easily used without requiring a large installation space.
This bicycle parking device is characterized in that a sideways arm is attached to the upper part of a support column erected at a required height dimension, and a clamp with a lock mechanism for gripping the bicycle frame is provided at the tip of the arm. There is.

Japanese Unexamined Patent Publication No. 2001-151178

An object of the present invention is to provide a bicycle parking stand having excellent safety and a damping force generator that can be used as a component thereof.

The invention according to claim 1 comprises a fixing member, a support portion movably provided with respect to the fixing member to support the bicycle, and a storage mechanism for storing the support portion in the fixing member so as not to project outward. It is a bicycle parking stand equipped with.

According to the second aspect of the present invention, in the bicycle parking stand according to the first aspect, the storage mechanism has a storage speed changing portion for changing the speed at which the support portion is stored.

The invention according to claim 3 is the bicycle parking stand according to claim 2, wherein the support portion jumps up when the bicycle is removed, and the storage speed changing portion jumps up at a speed at which the support portion jumps up. The speed is changed from the speed to the second speed, which is faster than the first speed.

According to a fourth aspect of the present invention, in the bicycle parking stand according to the third aspect, the storage speed changing portion includes a cylinder and a piston formed with an orifice extending in a moving direction and moving inside the cylinder. ..

The invention according to claim 5 includes, in the bicycle parking stand according to claim 2, the storage speed changing portion includes a cylinder and a piston formed with an orifice extending in a moving direction and moving inside the cylinder. However, the inner diameter of the first inner diameter portion of the cylinder is set to be smaller than the inner diameter of the second inner diameter portion located on one side of the first inner diameter portion.

The invention according to claim 6 further includes a valve body that closes the orifice and is deformable in a direction away from the orifice in the bicycle parking stand according to claim 5.

The invention according to claim 7 comprises a cylinder in which a first inner diameter portion and a second inner diameter portion having different inner diameters are formed, and a piston in which an orifice extending in a moving direction is formed and moves inside the cylinder. It is a damping force generator provided.

The invention according to claim 8 further includes a valve body that closes the orifice and is deformable in a direction away from the orifice in the damping force generator according to claim 7.

According to the present invention, it is possible to provide a bicycle parking stand having excellent safety and a damping force generator that can be used as a component thereof.

(A) to (C) are explanatory views showing a usage state of a bicycle parking stand according to an embodiment of the present invention, and are a plan view, a side view, and a front view, respectively. (A) to (C) are explanatory views showing the internal structure of the bicycle parking stand, and are explanatory views showing the operation when the support portion falls down, respectively. (A) and (B) are an internal structural view and an external view of the damping force generator provided in the bicycle parking stand, respectively. (A) to (D) are a plan view, a one-sided sectional view, a side view, and a bottom view of the piston of the damping force generator provided in the bicycle parking stand, respectively.

Subsequently, an embodiment embodying the present invention will be described with reference to the attached drawings, and the present invention will be understood. In the figure, parts not related to the description may be omitted.

As shown in FIGS. 1 (A) to 1 (C), the bicycle parking stand 10 according to the embodiment of the present invention can support the saddle 122 and park the bicycle 12.
As shown in FIGS. 2 (A) to 2 (C), the bicycle parking stand 10 includes a support column 20, a support portion 30, and a storage mechanism 40.

The support column (an example of a fixing member) 20 is a hollow cylindrical member extending in the vertical direction. The lower end of the support column 20 is fixed to the installation surface.
A through hole H1 for passing a wire lock for fixing the bicycle 12 is formed in the central portion of the support column 20. The through hole H1 is provided below the storage mechanism 40.

The support portion 30 is provided so as to be movable with respect to the support column 20. The support portion 30 can be tilted from the support column 20 during use to support the front lower side of the saddle 122 of the bicycle 12. As shown in FIG. 1B, the bicycle 12 supported by the support portion 30 is stably supported with the front wheels touching the ground and the rear wheels floating.
As shown in FIG. 2 (B), the support portion 30 rotates around the rotation axis AX1 that rotatably supports the base end portion and jumps up, and in an unused state, as shown in FIG. 2 (A). , Stored in the column 20.
The outer peripheral surface of the support column 20 and the contact surface of the support portion 30 with the saddle 122 are covered with resin in order to prevent the bicycle 12 from being damaged. This resin is, for example, rubber.

The storage mechanism 40 is provided inside the support column 20 and can be stored in the support column 20 so that the support portion 30 does not protrude outward.
The storage mechanism 40 has a link 42 and a damping force generator (an example of a storage speed changing unit) 44.
The link 42 is a rod-shaped member that connects the support portion 30 and the damping force generator 44. The upper end portion of the link 42 is connected to the base end portion of the support portion 30 by a rotation shaft AX2.

The damping force generator 44 can change the speed at which the support portion 30 connected to the link 42 is housed (the speed at which the support portion 30 jumps up).
As shown in FIG. 3A, the damping force generator 44 has a rod 442, a cylinder 444, a piston 446, and a compression coil spring 449.

The rod 442 is a rod-shaped member extending in the vertical direction. As shown in FIGS. 2A to 2C, the upper end portion of the rod 442 is connected to the lower end portion of the link 42 by a rotation shaft AX3.

As shown in FIGS. 3 (A) and 3 (B), the cylinder 444 is a hollow cylindrical member, and contains oil and air inside.
The inside of the cylinder 444 is composed of a first inner diameter portion 444a located on the upper side and a second inner diameter portion 444b located on the lower side (one side) of the first inner diameter portion 444a, and the first inner diameter portion 444a. And the inner diameter of the second inner diameter portion 444b are different. Specifically, the inner diameter Da of the first inner diameter portion 444a is set to be smaller than the inner diameter Db of the second inner diameter portion 444b.

The piston 446 is fixed to the lower end of the rod 442. The piston 446 can move up and down inside the cylinder 444 according to the force applied from the rod 442.
As shown in FIGS. 4 (A) to 4 (C), the piston 446 is formed with one orifice (hole) H2 penetrating in the vertical direction and a plurality of (for example, six) orifices (holes) H3. There is. As shown in FIG. 4B, the diameter of the orifice H2 is set to be smaller than that of each orifice H3.
As shown in FIG. 4C, grooves GRV1 and GRV2 into which O-rings 447a and 447b (see FIG. 3A) are fitted are formed on the upper side and the lower side of the piston 446, respectively, along the outer peripheral surface. ing.

The lower surface of the piston 446 is covered with a valve body 448 as shown in FIG. 3 (A). The valve body 448 is a flexible resin having a thickness of about 1 mm, and is made of, for example, silicon. As shown by the alternate long and short dash line in FIG. 4D, a through hole H4 having a diameter larger than that of the orifice H2 is formed at a position corresponding to the orifice H2 of the valve body 448. Therefore, the valve body 448 is provided so as to be able to block the orifice H3, although it does not block the orifice H2.
Since the valve body 448 has flexibility, it can be deformed as shown by the alternate long and short dash line in FIG. 3A when the piston 446 rises and a force acts in the direction away from the orifice H3. That is, when the piston 446 rises, the closed orifice H3 is opened.

The compression coil spring 449 is arranged on the outer circumference of the rod 442 so that the rod 442 passes through the inside. The upper end of the compression coil spring 449 is in contact with the upper inner surface of the cylinder 444, and the lower end is in contact with the upper surface of the piston 446.

Next, the operation of the bicycle parking stand 10 will be described. The bicycle parking stand 10 operates according to the following steps S1 to S3. Note that steps S1 and S2 are operations when the user parks the bicycle, and step S3 is an operation when the bicycle is parked.

(Step S1)
The user tilts the support portion 30 of the support column 20 from the state shown in FIG. 2 (A). The rod 442 moves upward against the force of the compression coil spring 449, and as shown in FIG. 2C, the upper half of the piston 446 has a first inner diameter portion 444a (FIG. 4) in which the diameter of the cylinder 444 is small. 3 (see (A))).
At that time, the valve body 448 receives a downward force due to the action of the oil inside the cylinder 444, and is deformed so as to be separated from the blocking orifice H3 as shown by the alternate long and short dash line in FIG. 3 (A). Therefore, since the orifice H3 is opened and the oil mainly passes through the six large-diameter orifices H3, the resistance generated by the oil (the force that hinders the rise of the piston 446) is reduced, and the user can press the support portion 30 with a light force. Can be defeated.
That is, by the action of the valve body 448, the user can tilt the support portion 30 with a light force.

(Step S2)
When the user releases the tilted support portion 30, the upper side (O-ring 447a) of the piston 446 pushes the first inner diameter portion 444a by the action of the compression coil spring 449 until a predetermined time elapses. As it passes and descends, the oil inside the cylinder 444 mainly passes through the small diameter orifice H2, and the piston 446 passes through the first inner diameter portion 444a at low speed. That is, the support portion 30 jumps up very slowly at the first speed V1.
In the meantime, the user can place the front side of the saddle 122 of the bicycle 12 on the support portion 30.
When the bicycle 12 is placed on the support portion 30, the piston 446 rises again due to the weight of the bicycle 12, the rotation of the support portion 30 is restricted by a stopper (not shown), and the piston 446 is at the highest position in the movable range. Stop.

(Step S3)
When the user lowers the bicycle 12 from the support portion 30, the support portion 30 slowly jumps up at the first speed V1 until a predetermined time elapses, as in step S2 described above.
When the upper side of the piston 446 descends from the first inner diameter portion 444a to the second inner diameter portion 444b, the inner diameter dimension expands from the inner diameter Da to the inner diameter Db, so that the oil inside the cylinder 444 is added to the orifice H2 and the outer circumference of the piston 446. It becomes possible to pass through the side as well, and descends the second inner diameter portion 444b at high speed.
That is, the support portion 30 jumps up from the middle at a second speed V2 faster than the first speed, and is housed in the support column 20 as shown in FIG. 2 (A).

The bicycle parking stand 10 described above is excellent in safety because the support portion 30 that protrudes outward during use can be stored so as not to protrude significantly outward when not in use.
Further, since the bicycle parking stand 10 is provided with the damping force generating device 44 and the fallen support portion 30 is stored faster from the middle, the state in which the support portion 30 protrudes to the outside of the outer periphery of the support column 20 is shortened, and more. Increased safety.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions that do not deviate from the gist are within the scope of the present invention.
The damping force generator described in the above-described embodiment can also be used for applications other than the bicycle parking stand.

10 Bicycle parking stand 12 Bicycle 20 Support 30 Support 40 Storage mechanism 42 Link 44 Damping force generator 122 Saddle 442 Rod 444 Cylinder 444a First inner diameter 444b Second inner diameter 446 Piston 447a, 447b O-ring 448 Valve body 449 Compression coil springs AX1, AX2, AX3 Rotating shaft GRV1, GRV2 Groove H1 Through hole H2, H3 O-ring H4 Through hole

Claims (8)

Fixing member and
A support portion that is movable with respect to the fixing member and supports the bicycle,
A bicycle parking stand including a storage mechanism for storing the support portion in the fixing member so as not to project outward. In the bicycle parking stand according to claim 1.
A bicycle parking stand having a storage speed changing portion in which the storage mechanism changes the speed at which the support portion is stored. At the bicycle parking stand according to claim 2.
The support pops up when the bicycle is removed,
A bicycle parking stand in which the storage speed changing portion changes the speed at which the supporting portion jumps from a first speed to a second speed faster than the first speed. At the bicycle parking stand according to claim 3,
The storage speed changing part is a cylinder and
A bicycle parking stand having an orifice extending in a moving direction and having a piston moving inside the cylinder. At the bicycle parking stand according to claim 2.
The storage speed changing part is a cylinder and
An orifice extending in the moving direction is formed, and a piston moving inside the cylinder and a piston
Have,
A bicycle parking stand in which the inner diameter of the first inner diameter portion of the cylinder is set smaller than the inner diameter of the second inner diameter portion located on one side of the first inner diameter portion. In the bicycle parking stand according to claim 5.
A bicycle parking stand further provided with a valve body that closes the orifice and is deformable in a direction away from the orifice. A cylinder in which a first inner diameter portion and a second inner diameter portion having different inner diameters are formed,
A damping force generator comprising an orifice extending in a moving direction and a piston moving inside the cylinder. In the damping force generator according to claim 7,
A damping force generator further including a valve body that closes the orifice and is deformable in a direction away from the orifice.