JPH0323846Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention The present invention relates to a tire anti-slip device for preventing tires from slipping on snowy roads.

Conventionally, as a tire anti-slip device, a plurality of flexible synthetic resin cross belts are connected at intervals between two parallel side cables, and both side cables are connected to the side part of the tire. A known anti-slip device is one in which the cross belts are placed in close contact with each other across the tread portion of the tire by arranging and tightening the cross belts. Due to the shape of the cross belt, the large sliding force acting between the tire and the road surface during braking or starting could cause the cross belt to flip inside out on the tread surface, causing large stress to be applied to the cross belt and causing it to become torn. For this reason, a proposal was made in which the ends of the cross belt were bifurcated and each end was connected to the side cable, and the connection width was widened to prevent the belt from reversing. It takes time to bend and swage the steel plate connecting fittings around the side cables, and the connecting fittings come into contact with the side of the tire when attached to the tire, causing the cross belt to hit the road surface while driving. It has become clear that there is room for improvement in that the side portions of the tire are easily damaged by being rubbed by the connecting fittings due to displacement on the tread surface.

In view of the above points, the present invention is an anti-slip device for tires in which both ends of the cross belt are bifurcated to prevent front and back flipping, and the work of connecting the cross belt to the side strips is simplified. Another object of the present invention is to provide a tire anti-slip device that does not damage the side portions of the tire.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3.

1 is a cross belt made of flexible synthetic resin such as urethane resin, and has an elongated main body 2
V-shaped legs 3 with bifurcated tips at both ends of the
A large number of diamond-shaped protrusions 4 are formed on the ground surface of the main body 2, and at the center of the protrusions 4, there is a biting protrusion made of carbon steel at one end. A spike 6, which has a collar 8 formed on the other end to prevent it from coming off and is hardened by hardening, is embedded and fixed with its biting protrusion 7 protruding from the upper surface of the protrusion 4. .

Both ends of the leg portion 3 described above are bent inward, and thick mounting portions 3a, 3a are provided at the bent ends.
A flexible pipe 10 in which a flat steel wire 11 is tightly wound in a helical shape is passed between the two mounting parts 3a, 3a, and extends through the mounting parts 3a. Mounting part 3 by embedded molding
a, 3a, and this pipe 1
0 is pre-shaped into a circular arc shape with a curvature approximately equal to the turning curvature of the side cable 15 so that the attachment parts 3a, 3a are not forcibly pulled when the side cable 15 is turned circularly at the side part of the tire a. It is curved, and the corresponding surfaces of the bent portions of the leg portions 3 are connected by integrally molded reinforcing ribs 13.

Note that the cross belt 1 can be easily attached to the tire a by being curved and shaped in advance to match the cross-sectional shape of the tire a.

In this way, a plurality of cross belts 1 having pipes 10 connected to both ends are arranged at regular intervals, and side cables are installed in each pipe 10 so as to connect the ends of the same side of each cross belt 1. 1
5 are inserted one by one, and both ends of each cross belt 1 are fixed to both side cables 15 by caulking the outer peripheral surface of the portion between the attachment parts 3a, 3a of the leg part 3 of each pipe 10. There is.

As shown in Fig. 1, this anti-slip device is placed over the outer periphery of the tire a with the contact surface of the cross belt 1 facing outward, and both side cables 15 are bent circularly at the side portions of the tire a. By connecting and tightening both ends with the fastening band 16, the cross belt 1 is attached tightly across the tread part of the tire a, and the cross belt 1 with the protrusion 4 formed therein is attached.
The spikes 6 bite into the frozen road surface to prevent the tire a from slipping, and bifurcated legs 3 are formed at both ends of the main body 2 and the tips thereof are connected to the side cables 15. Due to the connection, the main body part 2 is pulled from both front and rear sides, and the length of the main body part 2 is shortened, making it difficult to twist, so a slipping force acts between the tire and the road surface. At times, the main body portion 2 is prevented from turning over on the tread surface, and the width of the connecting portion with the side cable 15 is wide, preventing the entire cross belt 1 from turning inside out. However, especially when fixing the bifurcated leg portion 3 to the side cable 15, the pipe 10
Since it is only necessary to caulk at one place, the connection work is easy. When mounted on tire a, the attachment part 3a of the leg part 3 comes into contact with the side part of tire a, and the cross belt 1 is placed on the tread surface. When the tire a is displaced, the side portion is only rubbed by the synthetic resin attachment portion 3a, and the tire a is not damaged.

In order to prevent the pipe 10 and the side cable 15 from rusting, the outer periphery thereof may be plated or coated with a synthetic resin layer.

Further, in the above embodiment, a flat steel wire was spirally wound around a metal pipe connected to the leg portion 3, but instead of this, a general steel pipe may be used.
Further, instead of the cable 15 made of stranded wire, a wire made of a single wire may be used.

Structure and Effects of the Invention As specifically explained in the above embodiments,
The anti-skid device for tires of the present invention is made of flexible synthetic resin that is installed across the tread of the tire between two parallel side strips placed on both sides of the tire. In a tire skid device in which a plurality of cross belts are passed at intervals, both ends of the cross belt are bifurcated, and a flexible pipe in which a metal wire is closely spirally wound is passed between each tip. The cross belt is immovably fixed to the side strips by inserting the side strips into the pipes and fixing them to the pipes. By bifurcating both ends and connecting the tips to the side strips, the cross belt can be prevented from turning over on the tire tread surface, and can be connected by passing a pipe between the bifurcated tips. However, by inserting the side strips through it, the branched ends of the cross belt can be fixed to the side strips by simply fixing one part of the pipe to the side strips, which simplifies the work of installing the cross belt. In addition, since the pipes were joined by embedded molding,
When attached to the tire, the pipe does not come into contact with the side part of the tire, which prevents the tire from being scratched.Furthermore, the pipe is made of a tightly spirally wound metal wire and is flexible. Because of this, it can be bent into an arc shape, which has the effect of preventing the side strips from being bent greatly at the edge of the pipe and being cut at that portion when attached to the tire.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a state in which an anti-slip device according to an embodiment of the present invention is attached to a tire, Fig. 2 is a partially cutaway plan view showing details of the connecting portion between the cross belt and the side cable, and Fig. 3 The figure is a partially cutaway perspective view of the same. 1... Cross belt, 3... Leg, 3a... Mounting part, 10... Pipe, 15... Side cable, a... Tire.

Claims (1)

[Scope of utility model registration request] A plurality of flexible synthetic resin cross belts, which are attached across the tread of the tire, are placed at intervals between two parallel side strips placed on both sides of the tire. In the anti-slip device for tires, both ends of the cross belt are bifurcated, a flexible pipe with a tightly spirally wound metal wire is passed between the tips of each, and the pipes are joined by embedding molding. An anti-slip device for a tire, characterized in that the cross belt is immovably fixed to the side strip by passing through the side strip and fixing to the pipe.