JPH0216949Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a trial bicycle.
The present invention relates to a trial bicycle used for competing without losing balance in events such as over logs, ditch riding, slope riding, figure-eight riding, and S-curve riding without losing balance.

Conventionally, as shown in Utility Model Application Publication No. 49-71952,
There is a technique to prevent the handle from falling over by regulating the rotation angle of the handle with a stopper, and this stopper regulates the rotation angle of the handle in the left and right directions in the same way.

However, depending on whether the rider is left-handed or right-handed, the rotation angle that is best for maintaining a stationary state is often different depending on whether the rider is left-handed or right-handed.
This has become difficult to apply to trial bicycles, which particularly require a sense of balance.

The present invention was devised in view of the above points, and the purpose is to provide a stopper structure that can regulate the left and right steering wheel turning angles to be the same or different depending on the rider. It is something.

The structure of the present invention is that the front wheel is supported by a pair of left and right front forks that extend downward from both left and right sides of the upper end of the head pipe, and a pair of left and right triangular stopper mounting plates are provided between the back surface of the head pipe and the lower surface of the down tube. In a trial bicycle, an adjuster stopper is screwed on the rotation locus of the front fork on each stopper mounting plate to regulate the rotation angle of the handlebar. The screws are separately provided on the directional rotation trajectory so that they can be adjusted in and out, and the handle rotation angles in the left and right directions are separately regulated.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Figure 1 is a schematic side view of a trial bicycle, omitting details such as spokes, brake wires, gear cranks, etc. In the figure, 1 is the front wheel. It is supported by a pair of left and right front forks 2, 2 extending downward from both left and right sides of the upper end.

Further, 3 is a rear wheel, 4 is a saddle, 5 is a top tube, 6 is a seat tube, 7 is a down tube, 8 is a handlebar, 9 is a hanger that pivotally supports a gear crank, 10 is a gear, and 11 is a chain.

As shown in FIG. 2, a pair of left and right triangular stopper mounting plates 13, 13 are fixed between the back surface of the head pipe 12 and the lower surface of the down tube 7 by welding means.

Adjustment stoppers 14, 14 are screwed onto the rotation locus of the front forks 2, 2 on these stopper mounting plates 13, 13, and the adjustment stoppers 14, 14 are used to adjust the rotation angle of the handle ( It is configured to regulate the angle θ of the front wheel 1 with respect to the vehicle body.

Here, the adjuster stoppers 14, 14 are attached to the stopper mounting plate 1, as is clear from FIG.
Bolts 15, 15 screwed into threaded portions 13a, 13a of No. 3, 13 so as to be protruding and retractable, and the bolts 15, 15
It consists of protective caps 16, 16 fitted onto the head of the head, and hard rubber or the like is used for the caps 16, 16. Therefore, such an Asian stopper 1
By adjusting angles 4 and 14, the angle θ can be varied from 68 degrees to 70 degrees depending on the rider.

The illustrated embodiment is configured as described above,
The action will be explained below.

Now, when the handle is operated during the trial and the front fork 2 on the right side in FIG. It comes into contact with the adjuster stopper 14 provided. The angle θ at this time is the angle that the rider has adjusted in advance, that is, the angle at which the rider can stand still and maintain balance (around 68 to 70 degrees), so even if the rider stands still, the balance will not be lost, and the rider will not be able to maintain his/her balance. There is no need to return the steering wheel even when moving the vehicle forward.

As is clear from the above embodiments, the present invention supports the front wheel 1 with a pair of left and right front forks 2, 2 extending downward from both left and right sides of the upper end of the head pipe 12, and supports the front wheel 1 on the back surface of the head pipe 12 and the lower surface of the down tube 7. A pair of left and right triangular stopper mounting plates 13, 13 are fixed between the front forks 2, 2 on each of these stopper mounting plates 13, 13.
In a trial bicycle in which adjuster stoppers 14, 14 for regulating the handle rotation angle θ are screwed on the rotation locus of the adjuster stopper 1,
Numerals 4 and 14 are provided with screws that can be adjusted in and out separately on the leftward and rightward rotation loci of the front forks 2, 2, respectively, and configured to separately regulate the leftward and rightward handle rotation angles θ. Therefore, the steering wheel rotation angle α in the left and right directions can be regulated to be the same or different depending on the rider, and when the rider is stationary, the rider can easily maintain the stationary state in the posture that he or she is most comfortable with. It has remarkable effects and is suitable for trial use.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an embodiment of a trial bicycle according to the present invention, and Fig. 2 is a -
FIG. 1...Front wheel, 2...Front fork, 7...Down tube, 12...Head pipe, 13...Stopper mounting plate, 14...Adjustment stopper.

Claims (1)

[Scope of utility model registration request] The front wheel 1 is supported by a pair of left and right front forks 2, 2 extending downward from both left and right sides of the upper end of the head pipe 12, and a pair of left and right triangular stopper mounting plates are provided between the back surface of the head pipe 12 and the lower surface of the down tube 7. 13, 13, and adjuster stoppers 14, 14 are screwed on the rotation locus of the front forks 2, 2 on these stopper mounting plates 13, 13 to regulate the handlebar rotation angle θ. The adjuster stoppers 14, 14 are separately provided on the leftward and rightward rotation loci of the front forks 2, 2 so as to be freely adjustable in and out of the screws, and separately regulate the leftward and rightward handle rotation angles θ. A trial bicycle characterized by being configured to.