JPH0420643Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Application Field) This invention is for use in tires for vehicles running on icy and snowy roads, in which elastic members made of rubber or synthetic resin are connected to each other by connecting fittings to form an endless or bounded band having a large number of meshes. Regarding the improvement of anti-slip equipment. (Prior art) As shown in Japanese Patent Publication No. 57-12689, a string-like rubber member with a core material is used as an anti-slip device to be attached to vehicle tires when the road surface is covered with ice and snow. An endless belt-shaped anti-slip device with a large number of meshes is formed by winding the rubber members in a spiral shape according to the outer diameter of the tire and connecting and fixing adjacent rubber members at appropriate intervals in a staggered manner using metal connecting fittings. Also, in Japanese Patent Application Laid-Open No. 61-257634, the present applicant prepares in advance, for example, 10 to 15 mesh piece unit bodies 1 having a plurality of meshes, as shown in FIGS. By connecting and fixing the connecting parts (dotted circles) of 1 to each other using metal connecting fittings 3 to form an endless belt-shaped anti-slip device with a large number of meshes, the pitch, number, arrangement, etc. of the units can be adjusted. An anti-slip device has been disclosed that can be applied to tires of various sizes simply by providing variations. In FIG. 1, numerals 4 and 5 are a tightening rope and a rubber ring for fixing the anti-slip device to the tire, 6 is a metal fitting for attaching the anti-slip device to the tightening rope and the rubber ring, and 7 is an elastic member. (Problems to be Solved) In the above-mentioned conventional anti-slip device, as shown in FIG. has a structure that protrudes largely from the string-like elastic member on the ground contact side, so when the vehicle runs on a dry road, the coupling fitting 3 wears down and breaks due to friction with the road surface, and as a result, the anti-slip device itself becomes damaged when driving at high speed. There is a problem that it can no longer be used as an anti-slip device after being dismantled. The object of the present invention is to solve this problem and provide a highly durable anti-slip device for vehicle tires. (Means for Solving the Problems) The anti-slip device for vehicle tires of the present invention is formed by connecting elastic members made of rubber or synthetic resin to each other with connecting metal fittings to form an endless or ended band having a large number of meshes. The anti-slip device for a vehicle tire is characterized in that a small groove is provided on the surface of the connection portion of the elastic member, and a ground side of the connection fitting is fitted into the small groove. (Function) Due to the above structure, the anti-slip device of the present invention does not have the problem of the connecting fittings wearing out before the string-like elastic member and losing the essential connection function as in the conventional example, and the wear of the string-like elastic member. The connecting fittings will wear out in a well-balanced manner. (Example) An example of the present invention will be described in detail below with reference to the drawings. 3 to 5, reference numeral 10 denotes a string-like elastic member made of rubber or synthetic resin of a net-type vehicle tire anti-slip device composed of a plurality of net-like pieces;
1 is a core material made of organic or inorganic fiber cord such as nylon, Kevlar, steel, etc. 12 is a connecting portion where the string-like elastic members 10 are in contact with each other;
The surface of the elastic member 10 (grounding side)
A small groove 14 is provided in 13 so as to cross it. If the depth B of the small groove 14 is too large, the thickness E of the string-like elastic member 10 will be insufficient at the connecting part 12, causing problems such as rubber breakage during high-speed running, and conversely, if the depth B is too small, the elasticity of the connecting fitting 15 will be reduced. Surface 1 of member 10
The degree of protrusion from the surface of 3 is increased, and the connecting fitting 1
This will accelerate the wear of the parts. A particularly desirable state in which the grounding side of the connecting fitting 15 fits into the small groove 14 is when the entire thickness A of the connecting fitting 15 on the grounding side fits into the small groove 14. The total thickness A of the side may be the same as the depth B of the small groove 14, or a part of the grounding side of the metal fitting 15 may be in a fitted state in which it projects somewhat from the small groove 14. As an example, a desirable range of the ratio of the thickness A of the connecting fitting 15 to the depth B of the small groove 14 is A/B=1.3 to 0.5. The width C of the small groove 14 is preferably equal to or slightly larger than the width D of the connecting fitting 15. The small grooves 14 can be easily formed by using a mold provided with a small groove forming protrusion when the net-like piece unit is previously manufactured by press molding. Since the connecting fitting 15 is made of a hard material with good wear resistance, such as stainless steel, its thickness is B.
is too large, the connecting portion 1 of the string-like elastic member 10
Not only is it not easy to bend when connecting the two, but it may break during processing and become unusable.
Moreover, if it is too small, the durability of the connecting fitting itself will be insufficient. As a specific example of this thickness A, for example, in the case of stainless steel, it is about 2.0 mm, and about 3.0 mm.
If it exceeds mm, cracks are likely to occur during bending. When using the connecting fitting 15, the connecting parts 12 of a plurality of net-like piece units prepared in advance are butted against each other, and both small grooves 14 are aligned, and then the connecting fitting 15 is bent so as to wrap around the connecting parts. Fit the grounding side into the small groove 14. A string-like rubber member with a core material is wound spirally to match the outer diameter of the tire, and adjacent rubber members are connected and fixed at appropriate intervals in a staggered manner using metal connecting fittings to form a large number of meshes. It goes without saying that the present invention can be applied to an endless belt-shaped anti-slip device having the following characteristics. (Effects) As described above, the present invention has a structure in which a small groove is provided on the surface of the connection part of the net type tire anti-slip device, and the ground side of the connection fitting is fitted into this small groove, so the durability of the connection fitting is improved. As a result, the durability of the anti-slip equipment is improved. Furthermore, vibration and noise during high-speed driving are reduced, contributing to improved ride comfort. Table 1 shows the combination of the thickness of the connecting fitting and the depth of the small groove in the connecting part for a net-type anti-slip device in which a plurality of pre-prepared net-like piece units are connected and fixed to each other using connecting fittings to form an endless strip. The results show the results of an actual vehicle durability test conducted on a dry road surface using two types of comparative examples and two examples. Furthermore, the JAIS (Japan Automobile Industry Parts Association Tire Anti-Slip Committee) standards state that the anti-slip equipment must not be damaged even after driving for 200km.
As shown in this table, the durability of the anti-slip device according to the present invention is improved by about 7 to 13 times compared to the conventional example in which no small groove for connecting metal fittings is provided in the connecting portion.

【table】

【table】 [Brief explanation of drawings]

Fig. 1 is a partial plan view of a net-type anti-slip device formed into a band shape by connecting a plurality of net-like piece units to each other with connecting metal fittings; Fig. 3 is a perspective view of the connecting part of the present invention of the net type anti-slip device, Fig. 4 is a sectional view taken along the line X-X of Fig. 3, Fig. 5 is a sectional view taken along the line Y-Y of Fig. 3, and Fig. 6. is a perspective view of a connecting fitting. 10...Elastic member, 12...Connecting portion, 14...
Small groove, 15... Connecting metal fitting, B... Depth of small groove, A
...Thickness of the connecting metal fittings.

Claims (1)

[Scope of utility model registration request] In an anti-slip device for a vehicle tire in which elastic members made of rubber or synthetic resin are connected to each other by a connecting fitting to form an endless or endless band having a large number of meshes, a small groove is provided on the surface of the connecting portion of the elastic member, An anti-slip device for a vehicle tire, characterized in that a ground side of a connecting fitting is fitted into the small groove.