JPH0742814Y2 - Spike pin for anti-skid device for automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a spike pin of an anti-skid device for an automobile.

[Conventional technology]

Conventionally, a spike pin of an anti-skid device for an automobile of this type has a cylindrical chip 1 fixed to the upper surface of a columnar body 2 as shown in FIG. 4, and is formed on the body 2 and its lower part. Since the shank 4 including the flange portion 3 was formed by integrally forging a metal round bar, the body portion 2
Is solid.

[Problems to be solved by the device]

FIG. 4 shows a state in which the spike pin shown in FIG. 3 is integrally molded (insert molded) and fixed to a slip preventing (tread) member of an automobile tire slip preventing device.

Two kinds of forces, a driving force and a vehicle weight, are applied to the tip of the chip 1 during traveling.

The driving force is applied to the chip 1 in a direction perpendicular to the axis of the body portion 2, and at this time, the force that the spike pin tries to come out to the front side of the tread 5 is the outer diameter B of the flange portion 3 and the body portion 2. 2C, which is the difference between the outer diameters A, and the upper dimension D of the flange portion 3 of the tread 5 in the thickness direction. If this catch is weak, the spike pin will drop out on the front side of the tread 5 during driving.

Further, the vehicle weight is applied to the tip 1 in the same direction as the axis of the body portion 2, and at this time the spike pin is pushed to the back side of the tread 5, but at this time, the entire bottom surface of the flange portion 3 is tread 5. The lower dimension E portion of the flange portion 3 in the thickness direction can be received. If this dimension E is small, cracks occur in the tread member on the lower outer peripheral portion of the flange portion 3 and the spike pin is pulled out on the back side of the tread 5.

That is, since the body 2 and the flange 3 of the shank 4 are an integral structure of a solid metal, the outer diameter A of the body 2 has a negative effect on the holding of the tread 5 of the spike pin, and the spike pin is treaded. The holding strength when held in 5 is the outer diameter B of the flange portion 3, the dimension 2C which is the difference between the outer diameter B of the flange portion 3 and the outer diameter A of the body portion 2, and the flange portion of the tread 5 in the thickness direction. 3 is determined by the upper dimension D and the lower dimension E.

As described above, the outer diameter A of the body portion 2 has a negative effect on the holding of the tread 5 of the spike pin.
The diameter is set to the minimum necessary and sufficient to fix the joints, but since the body 2 and the flange 3 of the shank 4 are integrally forged, the outer diameter B of the flange 3 is smaller than the outer diameter A of the body 2. About 2
It can only be doubled.

Therefore, in order to increase the holding strength of the spike pin in the tread, the dimensions D and E have to be increased to some extent, and the length H of the spike pin must be increased and the thickness of the tread 5 must be increased. .

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a spike pin for an automobile tire anti-skid device that can be retained in the tread with sufficient strength even when the tread is thin.

[Means for Solving the Problems]

A spike pin of an anti-skid device for an automobile tire according to the present invention comprises a hollow body having a hole formed integrally by pressing a thin plate having a hole, and an annular flange portion on the lower outer periphery of the hollow body. A tip fixed to the hollow body so as to project from the upper surface of the hollow body, and the other parts except the head of the chip are embedded in the tread of the tire antiskid device. To do.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

The spike pin of the anti-skid device for an automobile of the present invention is insert-molded into a tread 5 formed of an elastic body such as rubber or synthetic resin with a required width that can be fitted to the outer peripheral surface and both side surfaces of the tire. Things
As shown in FIG. 1, a body 2 made of a thin plate-like tubular body, and a cylindrical tip 1 fixed in the axial direction of the body 2 so that a part of the body 2 projects from the upper surface of the body 2, The body 2 includes a disc-shaped flange 3 integrally formed on the lower surface of the body 2.
Has a lateral through hole 6.

The shank 4 including the body portion 2 and the flange portion 3 can be integrally formed from a thin metal plate by pressing.

Since the press working of the shank 4 can be performed by a normal progressive type method, by making a necessary hole in a portion corresponding to the body 2 in the stage before the bending process, the body 2 can be finished at the end of the bending of the shank 4. The holes 6 can be simultaneously formed on the side surfaces of the.

FIG. 1 shows a spike pin when the cylindrical tip 1 is fixed to the upper surface of the body 2 by brazing.

FIG. 2 shows a state when the spike pin shown in FIG. 1 is insert-molded in the tread 5.

The spike pin of the anti-skid device for a vehicle tire according to the present invention is formed by pressing a single thin plate having the through hole 6 at a desired position as described above. Can be increased regardless of the outer diameter of the tread 5, and thus the thickness of the tread 5 can be reduced.

Further, when this is embedded in the tread 5, the material of the tread 5 is filled through the hollow portion and the hole 6 inside the body portion 2 made of a thin plate-shaped tubular body, and therefore, in FIG. Unlike the conventional holding of the spike pin only by the flange portion 3 as shown, since the entire shank 4 takes charge of holding, the holding strength is dramatically increased.

Since the tread material continuously penetrates the hole 6 on the side surface of the body portion 2, the spike pin is completely fixed in the tread 5, and the upper dimension of the flange portion 3 in the thickness direction of the tread 5 is larger than that of the conventional spike pin. Even if D ′ and the lower dimension E ′ are reduced, the same holding strength as that of the conventional spike pin can be obtained. Therefore, the length H ′ of the spike pin can be shortened and the thickness of the tread 5 can be reduced. Becomes

The chip 1 may have a columnar shape or any other shape.

The spike pin of the anti-skid device for automobiles according to the present invention also has the effect of reducing the weight of the shank as compared with the conventional spike pin, reducing the damage to the road surface when driving on a dry road and rotating the tire. Since the centrifugal force of the tread generated with the above can be reduced and the load applied to the fastening portion can be reduced, the weight of the entire apparatus can be reduced.

[Effect of device]

The spike pin of the vehicle tire anti-skid device of the present invention has the following effects and eliminates the drawbacks of the conventional spike pin.

(1) The holding strength of the spike pin in the tread can be dramatically increased.

(2) The thickness of the tread for holding the spike pin can be reduced.

(3) The weight of the spike pin can be reduced, and the damage to the road surface during traveling on a dry road can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a spike pin of an anti-skid device for a vehicle tire according to the present invention, and FIG. 2 is a sectional view of a spike pin of an anti-skid device for an automobile according to the present invention arranged in a tread. FIG. 4 is a sectional view of a spike pin of a conventional automobile tire anti-skid device, and FIG. 4 is a sectional view of a conventional automobile tire anti-skid device in which the spike pin is arranged in a tread. 1 ... Chip, 2 ... Body, 3 ... Flange, 4 ...
Shank, 5 ... Tread, 6 ... Through hole.

Claims (1)

[Scope of utility model registration request] 1. A hollow body having a hole integrally formed by pressing a thin plate having a hole, an annular flange portion on the lower outer periphery of the body, and a hollow body protruding from the upper surface of the hollow body. Thus, a spike of an automobile tire anti-skid device, characterized in that it comprises a chip fixed to the hollow body, and other parts except the head of the chip are embedded in the tread of the tire anti-skid device. pin.