JPS63263108A - Tire anti-skid unit - Google Patents

Abstract

PURPOSE:To improve the installing workability and adaptability of a unit main body to a tire by forming grooves at the unit main body opposite to the shoulders of the tire, in the unit which is made of a flexible material such as rubber. CONSTITUTION:A unit main body 60 is formed by sealing specific reinforcement cords in a rubber material formed in nets. Except the both ends of the unit main body 6 in the longitudinal direction, lozenge-shaped outer frame 60A are connected plurally, and between the outer frames 60A, smaller frames 60B are connected continuously respectively. Moreover, at the both ends of the unit main body 60 in the longitudinal direction, triangular outer frames 60C are formed. In such a composition, on the surface of the lateral ends of the outer frames 60A and 60C, their longitudinal ends are neighbored to the smaller frames 60B to form three parallel grooves 100 extending longitudinally. Each groove 100 is opposed to near the shoulders when the tire is installed to the unit main body 60.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire anti-slip device, and particularly to a tire anti-slip device whose main body is made of a flexible material such as rubber or synthetic resin.

[Prior Art] Tire anti-slip devices are known in which rubber, urethane elastomer, etc. are molded into a ladder shape or a net shape.

FIG. 9 shows an example of this type of tire slip prevention device, in which a plurality of hooks 14 and 16 are respectively engaged along the longitudinal direction at both widthwise ends of the main body 12 of the tire slip prevention device. ing. An inner fitting 18 made of a resin rope or wire rope with a relatively low elongation rate is fixed to the hook 14 fixed to one end. Inside fitting 1
8 has a joint hook 20 that is hooked to the main body 12 at one end, and a joint hook 22 that connects the ends of the inner fittings 18 to each other at the other end.

The main body 12 is placed on the inner side surface of the tire with the side on which the hook 14 is locked, and is placed over the outer periphery of the tire. The inner fitting 18 has a joint hook 22 that is hooked to a loop portion 18A that locks the joint hook 20 and is connected in an annular manner. It is latched.

As shown in FIG. 1θ, two outer fittings 26 made of elastic annular bodies such as rubber rings are attached to the hook 16. As shown in FIG. 11, a joint hook 28 which is bifurcated to form two hook portions 28A is locked to this outer attachment 26. As shown in FIG. The joint hooks 28 have hook portions 28A hooked into two outer joint holes 30 formed in the main body 12, respectively.

As a result, the main body 12 attached to the tire 32
The inner fitting 18 and the outer fitting 26 are tightened to wrap the tire 32 around the tread 32A and shoulder portion 32B of the tire 32.

By the way, in such a tire slip prevention device, the main body 1
2 is largely bent around the shoulder portion 32B of the tire 32.

However, since the main body 12 has high rigidity in order to ensure durability, etc., the above-mentioned bending cannot be easily performed, and there is a problem that the workability of attaching the main body 12 to the tire 32 is poor. Also,
As a result, the suitability of the main body 12 to the tires 32 deteriorates, and the main body 12 sometimes slips from the tires 32 when the vehicle turns, when the vehicle climbs up a hill, or when the tires 32 spin.

[Problems to be Solved by the Invention] In view of the above, the present invention provides a tire slip prevention device that can improve the workability and suitability of attaching the main body to the tire while ensuring the required rigidity. The purpose is to

[Means for Solving the Problems] The tire anti-slip device according to the present invention has a structure in which a groove is formed in the main body around the portion facing the shoulder portion of the tire.

[Function] In the present invention having the above structure, the thickness of the main body is reduced at the groove portion, so that it is easily bent at this portion. Since the thickness reduction is only partial, the required stiffness is ensured.

[Example] Figs. 1 to 3 show an example of the tire slip prevention device according to the present invention.

The main body 60 of the tire slip prevention device is made of a rubber material formed into a net shape and contains organic m! It is formed by enclosing a reinforcing cord made of a, metal, etc., and is formed by four approximately rhombic small frames that share a part with each other, except for the longitudinal ends. A frame portion 60A is formed, and the outer frame portions 60A are formed continuously in the longitudinal direction, and adjacent outer frame portions 60A are small frame portions 6 extending in the longitudinal direction of the main body 60.
It is continuous even through 0B. In addition, at both ends in the longitudinal direction, one approximately diamond-shaped small frame portion and two approximately triangular small frame portions that share a part with each other form one approximately triangular outer frame portion 6.
0C is formed, and this outer frame portion 60C is the same as the outer frame portion 60A.
The outer frame portion BOA and the outer frame portion 60G are also continuous through the same small frame portion SOB as described above.

The small frame portion 60B is flush with the outer frame portions BOA and 60C on the back surface (towards the back of the drawing), but the wall thickness is thin. This small frame portion 60B is provided to prevent twisting of the outer frame portions 60A and 60C, and a reinforcing cord is also enclosed in this portion.

Three parallel grooves 100 extending in the longitudinal direction of the main body 60 are formed on the widthwise end surface of each of the outer frame parts 60A, 60C, with the longitudinal end adjacent to the small frame part 60B. . As shown in FIG. 3, the groove 100 has a substantially U-shaped cross section, and the depths from the surface of the outer frame portions 60A and 60C, which slope downward from the inside to the outside in the width direction, are different from each other. However, the distances from the back surfaces of the outer frame portions 60A and 60C to the bottom of the groove are all equal. Further, the groove 100 is open at the end in the direction of the hand, and the deepest part of the groove bottom is formed by the small frame part 60.
B's surface and the road surface.

Note that, of course, the depths of the three grooves 100 may be the same.

The depth of this groove ioo is preferably 1/4 or more of the thickness of the outer frame portions 60A, 60G, and when the reinforcing cord is enclosed as in this embodiment, the depth is such that the reinforcing cord is not exposed. As a specific example, the reinforcement cord is attached to the outer frame portion 60A,
Enclose between 1/2 the thickness from the back side of 60C, and groove 1
The depth of 00 is 1/4 to 1 of the thickness of outer frame parts 60A and 60G.
/2 is preferable. In this embodiment, the outer frame portion 6
&1100 for thickness 7-8 mm of OA, 60C
The depth is set to 2 mm or more.

At one end in the width direction of the main body 60, one end of a connecting fitting 62 is fixed by caulking to all the outer frame parts 60A and one outer frame part 60C along the longitudinal direction. The other end of the connecting fitting 62 is fixed by caulking to an inner fitting 64 made of a resin rope or wire rope with a relatively low elongation rate. A loop portion 64A is formed at one end of the inner fitting 64, and a joint hook 65 is locked at the other end. This joint hook 65 is attached to the outer frame 6
It is also fixed to 0C by caulking, and the hook portion 65A is hooked to the loop portion 64A.

On the other hand, at the other end of the main body 60 in the width direction, one end of a connecting fitting 66 is fixed by caulking to all the outer frame parts 60A along the longitudinal direction. The other end of this connecting fitting 66 is
The hook portion 66A is bent into a substantially U-shape toward the front side of the main body 60 (the front side in the drawing). Further, a joint hook 68 is fixed to one of the outer frame portions 60C by caulking. As shown in detail in FIG. 4, this joint hook 68 has a hook portion 68A formed at one end, and is bifurcated at the other end. One branch 68B is fixed to the outer frame 60C as described above, and the hook 68C formed on the other branch is hooked to the other outer frame 60C on the same widthwise end side. It has become.

FIGS. 5 and 6 show an outer mount 50 for attaching the main body 60 to a tire. This outer fitting 50 is integrally molded from an elastic material such as rubber or urethane elastomer, and includes an annular connecting portion 52 and 12 equally-shaped arm portions 54 extending radially from the connecting portion 52 at equal intervals. is formed. The arm portion 54 has an annular tip and a central penetrating portion that forms a locking hole 56 . As shown in FIG. 6, a reinforcing material 58 made of cord or canvas may be enclosed in the circumferential direction around the hooking hole 56 and in the connecting portion 52 for reinforcement.

Next, a procedure for attaching the main body 60 of this embodiment to the tire 70 as shown in FIGS. 7 and 8 will be described.

The main body 60 is placed on the inner side surface of the tire 70 with the side on which the inner fitting 64 is disposed, and is placed over the outer periphery of the tire 70. The inner fitting 64 is a joint hook 6.
The hook portion 65A of No. 5 is hooked onto the loop portion 64A and connected in an annular manner.

Next, attach the joint hook 68 on the outer side of the tire 70.
A hook portion 68C is hooked to the outer frame portion 60C. Then, two auxiliary outer fittings 72 made of elastic annular bodies such as rubber rings are hooked onto the hook portion 68A of the connecting fitting 66 and the hook portion 68A of the joint hook 68. Further, the hook portion 66A and the hook portion 68A are hooked into the hook holes 56 of the outer mounting tool 50, so that the outer mounting tool 50
0 is located on the outer side surface of the tire 70 in a state where the arm portion 54 is elastically deformed in the direction of the tensile force.

As a result, one main body 60 has an inner fitting 64. The tire 7 is tightened by the auxiliary outer attachment 72 and the outer attachment 50.
It is wound around the tire 70 so as to wrap around the tread part 70A and shoulder part 70B of the tire 0, and is in a state where it is attached to the tire 70.

In this state, the three grooves 100 face the vicinity of the shoulder portion 70B of the tire 70, and the outer frame portions 60A, 60C are bent the most at this portion. In the groove 100, the outer frame parts BOA and 60G have low bending rigidity and are easily bent, so that the installation work of the main body 60 is facilitated, and the main body 60 fits well to the tire 70. 60, the rigidity is reduced only at the t4100 portion, so the required rigidity is sufficiently ensured as a whole, and durability etc. are not impaired.

In this embodiment, the grooves 100 are formed in three grooves at one end of the outer frame parts 60A, 60C at intervals in the width direction of the tread part 70A. Three easily bendable parts are formed on each side. Therefore, if the outer diameter of the main body 60 of this embodiment is approximately the same as that of the tire 70, it can be used for tires with different tread widths, such as bias structure tires, radial structure tires with different aspect ratios, tires with different inner diameter dimensions, etc. It can also be used with other types of tires without losing the above features.

In the above embodiment, the grooves 100 are arranged to extend in the longitudinal direction of the main body 60, but the grooves 100 are arranged to extend in other directions to reduce the cross-sectional area of the main body 60 near the shoulder portion 70B of the tire 70. The stiffness may be partially reduced.

Further, the shape of the main body 60 is not limited to that of the embodiment, and various shapes can be adopted, and there is no limit to the number of grooves 100.
Furthermore, if the spring constant of the outer fitting 50 is increased, there is no need to use the auxiliary outer fitting 72.

[Effects of the Invention] As explained above, the tire slip prevention device according to the present invention has the effect of improving the workability and suitability of attaching the main body to the tire while ensuring the required rigidity.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main body showing an embodiment of the tire slip prevention device according to the present invention, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is a cross section taken along the line III-III in Fig. 2. Figure 4 is the first
A perspective view of the joint hook attached to the body of the figure,
FIG. 5 is a perspective view of the outer attachment used to attach the main body of FIG. 1 to the tire, and FIG.
VI is a cross-sectional view taken along the line I, FIG. 7 is a side view showing a state in which the tire slip prevention device of this embodiment is attached to a tire, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a perspective view showing an example of a tire anti-slip device main body formed from a flexible material, FIG. 10 is a perspective view showing the tire anti-slip device main body of FIG. 9 attached to a tire, and FIG.
The figure is a perspective view of an outer mounting tool used when attaching the tire anti-skid device main body of FIG. 9 to a tire as shown in FIG. 10. 60...φ tire slip prevention device body, 60A, 60Cφ-・outer frame portion, 60B...φ small frame portion, 70.1 tire, 70A... tread portion. 70B...φ shoulder part, 100...No. groove.

Claims (1)

[Claims] (1) A tire slip prevention device in which a main body made of a flexible material is wrapped around the tire from the tread part to the shoulder part and attached to the tire, and the main body includes a part facing the shoulder part of the tire. A tire slip prevention device characterized by having grooves formed around the periphery of the tire.