JPH011669A - bicycle stand - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Field of Industrial Application) The present invention relates to a stand that is attached to the rear end of a bicycle frame to maintain the bicycle in an upright position when the bicycle is stopped.

(Prior art) This type of stand has four legs that can be tilted freely in the front and back direction of the bicycle to lock or unlock the leg members in the upright position, and the stand is in the jump position. When the leg member is moved to the upright position and then locked in that state, there is a problem in that the lock piece must be operated each time.

(Problems to be Solved by the Invention) This invention eliminates the above conventional problems and allows the lock piece to be automatically locked by simply moving the leg member from the jumping position to the standing position. The purpose of the present invention is to provide a bicycle stand that can perform such operations stably over a long life.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) During the initial process of moving the leg member from the jumping position to the standing position, the cam surface of the mounting body moves the locking piece from the backward tilting position to the forward tilting position, and the tension axis of the tension spring is approximately Move the lock piece to a position above the pivot point of the lock piece. Therefore, when the rear leg member is further rotated toward the upright position, the biasing force of the tension spring against the lock piece becomes a force that biases the lock piece toward the locked position, and this biasing force causes the lock piece to move to the forward tilted position. be moved towards.

(Example) Below, drawings showing examples of the present application will be described. 1 is a bicycle frame, 2 is a rear hub axle, and 3 is a nut screwed onto the hub axle 2.

Next, in the stand 4, reference numeral 5 denotes a mounting body, which, as is well known, is provided with one for the left side of the wheel and one for the right side (only the left side is shown in the figure). The mounting body 5 is fixed to the frame 1 with a nut 3. Reference numeral 6 denotes a guide hole, which is formed in an arc shape centered on a pivot point of a leg member, which will be described later. 7 is a locking portion, and 8 is a spring-mounted portion, and this spring-mounted portion 8 is located above a pivot point of a leg member, which will be described later.

Next, 10 shows a U-shaped leg member, and the upper connecting part 10a
is formed into a flat plate shape, and the other parts are formed into a round bar shape. 10b is a facing piece, which faces the connecting part 10a with the mounting body 5 in between, and which will be described later on in the bins 11, 12, .
14, it is integrated with the connecting portion 10a. The upper end portions of the connecting portion 10a and the opposing piece 10b are pivotally connected to the mounting body 5 using a pin 11, and the leg member 10 is attached to the first
It is possible to change the position between the standing position shown in the figure and the jumping position shown in FIG. 8 which is located behind the standing position. Reference numeral 12 denotes a bottle fixed to the connecting portion 10a and the opposing piece 10b, and is configured to move along the guide hole 6.

Next, reference numeral 13 denotes a lock piece, which is formed by press-molding a metal material, and is pivotally connected to the connecting portion 10a of the leg member 10 with the pin 2 (pivot fitting) 14, as shown in FIG. It is possible to change the position between the locked position (also called #head position) shown in Figures 6 and 7-8 and the unlocked position (also called backward tilted position) shown in Figures 6 and 7-8. . This lock piece 13 is significantly shorter than the leg member 10 (for example, 1
73) is a well-known retaining part 615 provided on the lock piece, and is provided so as to engage with the locking part 7 in the lock position. The retaining portion 15 includes a covering 15a made of a material with high wear resistance, such as steel,
It is less susceptible to wear due to sliding with the receiving surface 27, which will be described later.

Reference numeral 23 denotes a positioning piece provided at an intermediate position of the locking piece 13, which abuts against a receiving part 24 constituted by a part of the leg member 10 to determine the unlocking position of the locking piece 13. It is set up like this. 20 is the lock piece 13
An unlocking protrusion 22 protruding forward at the lower end of the lever indicates a tread surface formed by the upper surface of the unlocking protrusion 22.

Next, the tension spring 16 is tensioned between the spring top mounting part 8 and a spring top mounting part 17 provided at a lower position of the lock piece 13, and urges the lock piece 13 to the lock position or the unlock position. It is supposed to be done.

Both fulcrums 82.17a fix both ends of the tension spring 16
The positional relationship between the pivot point 14C of the lock piece 13 and the pivot point 14C of the lock piece 13 is as shown in FIG. 13 to maintain the locked position of the lock piece 13, and when the leg member 10 is in the upright position and the lock piece 13 is in the unlocked position, Tensile axis 162
is located slightly behind the pivot point 14C of the lock piece 13, and when the leg member 10 is in the jump position and the lock piece 13 is in the unlocked position, the tension axis 16a is located as shown in FIG. It is located at the rear of the pivot point 14c of the lock piece 13 and has a positional relationship such that the leg member 1O is kept biased upward. Note that when the leg member 10 is in the upright position and the lock piece 13 is in the unlocked position, the tension axis 16a may be located directly above the pivot point 14c. Further, when the frictional force between the leg member 10 and the lock piece 13 at the pivot point 14c is large enough to hold the lock piece 13 in the unlocked position, the tension axis 16a is
It may be located slightly forward than directly above. Further, the relationship between the supporting points 8a, 17a of the tension spring 16 and the pivot point 11a of the leg member 10 is such that the leg member 10 is tilted from the upright position to the jump position with the lock piece 13 in the rearward tilted position. At this time, the tension axis 16a of the tension spring 16 moves from the front to the rear of the pivot point 11a in the middle.

Next, a mechanism provided on the mounting body 5 and the lock piece 13 for automatically returning the lock piece will be explained. 26
30.31 is a cam surface provided on a part of the mounting body 5, 30.31 is a support piece provided on the upper part of the lock piece 13, 32 is a roller-shaped contact member, and a through hole is bored in the support piece 30. 30a
, 31a so as to be rotatable.

Both ends 32a of the contact member 32 are provided with through holes 3 as shown in the figure.
It is formed to have a larger diameter than the diameters of 0a and 31a, and is designed to prevent the distance between the supporting pieces 30 and 31 from expanding unexpectedly. The positional relationship between the cam surface 26 and the contact member 32 is such that in the initial process of rotating the leg member 10 from the jump position to the upright position, the contact member 32 contacts the cam surface 26, and the lock piece 1 is inserted through the contact member 32.
3 is in a positional relationship such that the tension axis 16a is moved by the cam surface 26 to a position approximately on the pivot point 14c of the loft piece 13.

27 is a receiving surface provided on a part of the mounting body 5, and the lock piece 13 is tilted from the rearward position to the forward position while the leg member 10 is rotated from the jumping position to the standing position. It is formed so as to receive the retaining part 15 and guide the engaging part 15 to a position where it engages with the locking part 7.

With the above configuration, when starting the bicycle, step on the tread 22 in the direction of the arrow from the state shown in FIG. By pushing in the direction of arrow B, the lock piece 13 is moved to the sixth position.
Move to the rear tilted position shown in the figure. When the lock piece 13 is moved to the rearward tilted position in this manner, the tension axis 16a of the tension spring 16 moves rearward from above the pivot point 14c of the lock piece 13. Therefore, even if the foot is removed from the lock piece 13, the lock piece 13 is maintained in the unlocked position and the leg member 10 is in the unlocked state. Therefore, then simply move the bicycle to arrow C
By simply moving the leg member 10 in the direction shown in FIG. 7, the leg member 10 is moved rearward relative to the mounting body 5, as shown in FIG. 7th above
In the state shown in the figure, the tension axis 16a moves rearward from the pivot point 11a (the position of the pin 11) of the leg member 10 with respect to the mounting body 5, so that the tension force of the tension spring 16 is transferred to the lock piece 13.
is applied to the leg member 10 as a force urging it toward the jumping position. Therefore, after passing through such a state, when the wheels of the bicycle touch the ground and the lower end of the leg member 10 leaves the ground, the leg member 10 moves to the jumping position shown in FIG. 8 by the spring force of the tension spring 16. made and held there. Note that when the leg member 10 is tilted from the state shown in FIG. 7 to the state shown in FIG. Upon contact, the lock piece 13 is rotated slightly forward, and the tension axis 16a moves to almost directly above the pivot point 14e. However, when the leg member 10 moves further rearward, the tension axis 6a again moves rearward from the pivot point 14c, and the lock piece 13 is tilted to the unlocked position.

On the other hand, when it is desired to move the leg member 10 from the jumping position to the standing position to stand up the bicycle, a force in the direction of arrow E is applied to the leg member 10 as is well known in FIG. Make contact, and then move the bicycle backwards around the contact point. At the beginning of this process, the contact member 32 of the lock piece 13 comes into contact with the cam surface 26 and the lock piece 1
3 is rotated forward, and as a result, the tension axis 16a comes close to directly above the pivot point 14c of the lock piece 13, as shown in FIG. Therefore, when the rear leg member 10 is further rotated forward relative to the mounting body 5, the lock piece 13 is integrated with the leg member 10 by the frictional holding force of the pivot fitting 14, as shown in FIG. Move as is. When the leg member 10 is further rotated forward with respect to the mounting body 5, the tension axis 16a of the tension spring 16 is moved further forward than the pivot point 14c of the lock piece 13. As a result, the biasing force of the tension spring 16 is
3 toward the lock position, and the lock piece 1
3 is swung toward the lock position as shown in FIG. After that, when the leg member 10 is further rotated with respect to the mounting body 5, the upper end of the retaining portion 15 slides on the receiving surface 27, and the leg member 10
When the lever reaches the upright position, the engaging portion 15 engages with the locking portion 7 to achieve a locked state.

The locking mechanism as described above may be applied to a single stand attached to a sports car or the like.

(Effects of the Invention) As described above, in the present invention, when the leg member 10 is in the upright position, the lock piece 13 is pulled to the lock position by the tension spring 16, and the lock piece 13 maintains the upright state of the leg member 10. When the leg member 10 is in the raised position, the lock piece 13 is pulled to the unlocked position by the tension spring 16, and the leg member 10 is lifted ( Not only can the leg members 10, which are in the flip-up position as shown in Fig. 8, be turned to the upright position in order to get off the bicycle and park the bicycle, but it is also possible to ride the bicycle comfortably. As the leg member 10 is moved, in the initial stage, the lock piece 1 is moved to a position where the tension axis 16a of the tension spring 16 is approximately on the pivot point 14c of the lock piece 13.
3 is relatively pushed by the cam surface 26, and when the leg member 10 continues to move toward the upright position, the tension axis 16a
is moved forward from the pivot point 14c, and the locking piece 13 moves to the locking position, which has the effect that the locking operation can be performed in conjunction with just the raising operation of the leg member 10.

Moreover, as described above, as the leg member 10 moves, the lock piece 1
3 is pushed relative to each other, so even if this is a load on the movement of the leg member 10, the movement is at the initial stage as described above, that is, when the leg member 10 is moved from top to bottom with the foot. Since the operation is performed at the stage of stepping toward and lowering the pedal, the operation has the effect of being easy to perform.

In addition, in the above case, since the cam surface 26 is in contact with the rotatable roller-shaped contact member 32, there is little wear on both the cam surface 26 and the contact member 32, and the above operation can be maintained stably over a long period of time. It has the effect of making you do it.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, in which Fig. 1 is a partially cutaway side view in a locked state, Fig. 2 is a front view, and Fig. 3 is a partially cutaway side view in a locked state.
-m line sectional view, Figure 4 is a IV-IV line sectional view, Figure 5 is a V-V line sectional view, and Figure 6 is a diagram showing the lock piece in Figure 1 in the unlocked position. , Fig. 7 shows the leg member moved to a position where the tension axis of the tension spring slightly exceeds the pivot point of the leg member, and Fig. 8 shows the leg member moved to the jump position. Figure 9 shows the leg member slightly rotated from the jump position to the standing position, and Figure 10 shows the leg member rotated further towards the standing position than in Figure 9. FIG. 11 is a diagram showing the state in which the leg member is
The figure which shows the state rotated toward the upright position further than the figure. 5... Attachment body, 10... Leg member, 13... Lock piece, 14c... Pivot point, 16... Tension spring, 16a
...Tension axis, 26...Cam surface, 32...Contact member. Figure 4 ia5 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] The upper end of the leg member is pivoted to the mounting body to be attached to the frame of the bicycle so that the position can be freely changed between a standing position and a jumping position rearwardly, and furthermore, the upper end of the leg member has a , the upper part of the lock piece is pivoted so as to be freely changeable between a locked position and an unlocked position rearward thereof, and at a position above the pivot point of the leg member in the mounting body; A tension spring is interposed between the lower position of the lock piece, and the positional relationship between both fulcrums that fix both ends of the tension spring and the pivot point of the lock piece is such that the leg member is in the upright position and as described above. When the lock piece is in the locked position, the tension axis of the tension spring is located in front of the pivot point of the lock piece, and when the leg member is in the upright position and the lock piece is in the unlocked position, the tension axis line is located directly above or further rearward of the pivot point of the lock piece, and on the other hand, when the leg member is in the jump position and the lock piece is in the unlocked position, the above-mentioned tension axis is located rearward than the pivot point of the lock piece. In the bicycle stand, a part of the mounting body is provided with a cam surface, and the lock piece is rotatably provided with a roller-shaped contact member for contacting with the cam surface. Moreover, the positional relationship between the cam surface and the contact member is such that in the initial process of rotating the leg member from the jump position to the upright position with the lock piece in the unlock position, the contact member The lock piece is in a positional relationship in which it contacts the cam surface and is moved by the cam surface through the contact member to a position where the tension axis is substantially on the pivot point of the lock piece. bicycle stand.