JPH0474640A - Processing for tire slip prevention - Google Patents

Abstract

PURPOSE:To form slits for tire slip prevention by forming slits in a circumferential direction comparatively easily and efficiently with a tooth-like blade applied to a rotating tire. CONSTITUTION:A tire, mounted on a tire drive shaft, is rotated at low speed of about 1 to 10rpm using a motor 6 and reduction gear 5. On the other hand, a tooth-like blade 1, synchronized with the rotation of the motor 6 by a synchronizer device 4, moves forward and backward. The width of a cutting edge 9 of the blade 1 is 'B' and the pitch between the cogs is 'P'. That is, the movement of the tire 7 is synchronized with the blade 1. If the blade 1 is pressed against the tread surface of the tire under this state, slits 10 are formed by the cutting edge 9. The amount of a synchronized movement of the blade 1 in a horizontal and a lateral direction is 'b' to the right and left respectively, and the lateral movement of a variation of 'h'. If the blade 1 moves only laterally, a slit pattern is linear, that is, b = 0. If 'h' = constant, a simple slit pattern can be formed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for anti-slip processing of automobile tires, and is capable of efficiently forming slits in the circumferential direction, which are effective for preventing slips during rain. This is how it was done.

<Prior Art> Conventionally, when the road surface becomes wet during rain, a water belly is formed between the tread surface of an automobile tire and the road surface, which acts as a lubricant and reduces the coefficient of dynamic friction between the two. Furthermore, even when the road surface is dry on a sunny day, if there is sand and dust on the road surface, this will form into particles and reduce the coefficient of dynamic friction in the same way as water belly.

For this reason, when the vehicle brakes suddenly, starts suddenly, or makes a sharp turn, slippage tends to occur between the tire tread surface and the road surface, which may result in loss of control of the vehicle.

As a countermeasure to this problem, there is a method to reduce the influence of water film and dust by forming a large number of slits in the circumferential direction of the tire tread surface, thereby increasing the coefficient of dynamic friction. There was no suitable method of fabrication.

<Problem to be solved by the invention> Providing a large number of slits in the circumferential direction on the tread surface of a tire improves the coefficient of dynamic friction between the road surface and the tire, and is effective in preventing tire slippage. This has been confirmed through experiments, but when trying to form multiple slits, conventional technology chucks the tire with a lathe, etc.
A method of forming a spiral slit by applying cross-feeding with a cutting tool has been considered, but this is inefficient and difficult to perform complex machining such as changing the width and depth of the slit.

<Means for solving the problem> The tire slip prevention processing method of the present invention relatively easily creates a large number of slits in the circumferential direction, which are effective in preventing slip, by pressing a comb-shaped blade against the tire while rotating the tire. This is an efficient method for forming and processing.

<Operation> While the tire is rotating, a comb-shaped blade that moves forward and backward and left and right on the drawing in synchronization with the rotation of the tire is pressed against the tread surface of the tire. A slit can be formed approximately along the .

This slit is advantageous for improving the coefficient of dynamic friction of the tire because a geometric pattern can be obtained by the synchronous movement of the comb-like blades.

An optimal pattern can be obtained by changing functions such as the shape of the comb blades, pitch of synchronous movement, amplitude, and phase shift.

<Example> FIG. 1 shows an example based on the tire slip prevention processing method of the present invention.

A tire 7 is attached to a tire drive shaft and rotated at a low speed of about 1 to 1 Q rpm by a motor 6 and a speed reduction device 5. On the other hand, the comb-shaped blade 1 is moved forward and backward and left and right in the figure in synchronization with the rotation of the motor 6 by the synchronizer 4. The details of the comb-shaped blade 1 are as shown in Figure 2 (front view), the width of the blade 9 is B, and the width of the third blade is B.
As shown in the figure (side view), the pitch of the blade 9 is P.

That is, the movement of the tire 7 and the comb blade 1 is synchronized.

In this state, when the comb-shaped blade 1 is pressed against the tread surface of the tire, a slit is formed by the blade 9 as shown in FIGS. 4 and 5. FIG. 4 shows a case in which the comb-shaped blade 1 is synchronously moved back and forth and left and right, the amount of movement is b on the left and right, and the amount of change in the amount of movement back and forth is h. FIG. 5 shows the slit pattern when only moving forward and backward, and b=o on the left and right, resulting in a straight line. If h- is constant, a simple slit will be formed.

In this way, it is possible to form various slit patterns by adjusting the synchronizer 6, and it is possible to obtain a slit pattern that is optimal for the usage conditions and tread pattern of the tire to be processed.

In the anti-slip processing method according to the present invention, the direction of the tire, the position and direction of the blade may be vertical or horizontal, and the method of driving and synchronizing the tire may be mechanical, electric, hydraulic, or other methods to efficiently perform the process. I can do it. All of these are within the scope of the present invention.

<Effects of the Invention> As described above, the present invention allows slits for tire slip prevention to be formed relatively easily and in a short time, making it easy to process in large quantities and improving the tire production process and repair process. It is possible to incorporate it into In addition, since processing can be performed at low cost, users can obtain the slip prevention effect of slit processing at low cost. In particular, accidents caused by tire slipping during rain can be significantly reduced, contributing to traffic safety.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a front view of the comb-shaped blade, FIG. 3 is a side view of the comb-shaped blade, and FIG. 4 is the A of the comb-shaped blade in FIG. FIG. 5, which is an enlarged view of the slit pattern in detail, is an example of the slit pattern. 111. Comb-shaped blade, 21. , turret, 391. Tire drive shaft, 400. Synchronizer, 511. Reduction device, 616. Motor 719. Tire, 881. Knife holder 911. Knife, 10, slit 11, bottom of the slit.

Claims (1)

[Claims] A processing method in which a large number of slits are formed in the tire tread surface in a direction roughly along the circumferential direction by pressing a comb-shaped blade against the outer circumferential surface of the tire while rotating the tire.