JPH08150815A - Spike for rubber chain - Google Patents

Abstract

PURPOSE: To improve the adhesive property of a spike to a rubber chain as well as to secure durability and reliability, in regard to this rubber chain spike in travelling on a snow-clad road and an icy road or the like being installed in a drive wheel tire mainly for an automobile. CONSTITUTION: This rubber chain spike is so constituted that an antiskid member 2 is attached to the upper end of a steel shank 1 and a flange 3 being largely bulged in the diametral direction and functioning as a nonskid action is integrally formed in the lower end, and in this constitution, at least more than one piece of projections consisting in 0.1 to 2.0mm in width and 0.1 to 2.0mm in height are installed in a flange lower surface of this flange 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spike for a rubber chain which is mainly attached to a tire for a driving wheel of an automobile and is used for traveling on a snowy road, an icy road or the like. More specifically, it enhances the adhesion of the spikes to the rubber chain to ensure more durability and reliability.

[0002]

2. Description of the Related Art A rubber chain is generally provided with spikes for securing the traction force of a vehicle on a snowy road, an icy road or the like. One of the problems when a vehicle runs with such a rubber chain is missing of spikes.For this reason, the hole for attaching the spike with the flange to the rubber chain in the vulcanization mold is more than the diameter of the flange in advance. It is set small, and then the spike is mechanically pushed into the hole in the previous term to bury the flange in the rubber, but in this case it takes time to push it one by one and mounted a rubber chain on the vehicle and ran In that case, since the flange is physically buried in the rubber, the spike may sometimes fall out.

There is also a method in which a through hole is provided in a rubber chain, a spike without a flange is passed through the rubber chain, and the lower end of the shank of the spike is stamped and plastically deformed to form a flange surface. In this case, the spike is used. There is a drawback in that a device for forming a flange surface by stamping with a large amount of force is required and, in some cases, the flange portion damages the tire tread portion during traveling.

From the above, it is preferable that another method, that is, a method in which a required number of spikes are preliminarily attached to a vulcanization mold at the time of manufacturing and chemically bonded to rubber, is used. In order to secure the adhesiveness with rubber, it is necessary to perform a surface treatment for adhesion on the spike. As a method of surface treatment, there is a method of arranging spikes in advance and spraying the surface treatment agent, but there is a drawback that the time and labor for arranging the surface treatment agent are scattered. Therefore, it is said that a surface treatment method in which a large amount of flanged spikes are dipped in a surface treatment agent at once and then dried is preferable.

[0005]

However, when a large amount of flanged spikes are dipped in the surface treatment agent at one time and then taken out and dried, the lower surfaces of the flanges adhere to each other due to the surface treatment agent and the spikes are removed. Adhesion to the rubber was unstable because it became difficult for them to come off from each other, and even if they came off, the film of the surface treatment agent peeled off and the thickness was not constant. For this reason, there is a problem in that spikes that have been completely adhered must be selected.

Further, since the quality control marks have not been conventionally engraved on the spikes, there is a drawback that different types of spikes cannot be identified even if they have the same shape, and different types of spikes are mixed and used. .

The present invention has been made as a result of studies aimed at solving such problems of the prior art, and an object of the present invention is to apply a large amount of spikes to a surface treatment agent at a time. The purpose of the present invention is to provide spikes that prevent the lower surfaces of the spike flanges from sticking to each other even after being dipped and dried. In addition, the purpose is to enable management of spike types by identifying spikes.

[0008]

The present invention adopts the following constitution in order to achieve the above object. That is, for a rubber chain in which a non-slip member 2 made of a cemented carbide is attached to the upper end of a steel shank 1, and a flange 3 which is largely bulged in the diametrical direction and has a retaining function is integrally formed at the lower end. Spike, the flange 3
Width of 0.1 to 2.0 mm and height of 0.
It is a spike for a rubber chain in which at least one, preferably 2 to 8 protrusions 5 having a diameter of 1 to 2.0 mm are arranged. Furthermore, it is preferable that the shape of the projection is substantially hemispherical so that the projection does not have a corner.

Further, a width of 0.1 to 2.0 is formed on the lower surface of the flange.
mm, height of 0.1 to 2.0 mm, and at least one character, symbol, or figure having a ridge as an outline provides the effect of preventing the peeling of the adhesive and controlling the type of spike. To be

[0010]

According to the above construction, even if the spikes are dipped in the surface treatment agent and then dried, even if the flange lower surfaces face each other even if they face each other, the protrusions provided on the flange lower surfaces do not cause surface contact. There is no point contact, so there is no close contact, and the film thickness of the surface treatment agent does not vary even if it comes off. Further, the size of the protrusion is width O. 1
mm-2.0 mm, height O. 1 mm to 2.0 mm, particularly preferably 0.3 mm to 1.5 mm in width and 0.3 m in height
m to 1.5 mm is preferable. If the width is less than 0.1 mm, the strength is remarkably reduced and the protrusions are crushed during handling of the spike, which is not preferable, and the width is 2.0 m.
If it is larger than m, the effective bonding area of the lower surface of the flange is reduced, which is not preferable. If the height of the protrusion is 0.1 mm or less, the height may be lower than the film thickness of the surface treatment agent.
If it is more than mm, the total length of the spike will be too long and the protrusion may fly out to the back of the rubber chain. Furthermore, if the projections are hemispherical in shape, the corners are eliminated, so that there is an effect that the lower surfaces of the flanges of the spikes do not damage the coating film of the surface treatment agent.

Further, a width of 0.1 to 2.0 is formed on the lower surface of the flange.
mm and height of 0.1 to 2.0 mm ridges are used to arrange one or more letters / symbols and figures so that the lower surfaces of the flanges will be flush with each other even after being dipped in the surface treatment agent as above. It is possible to prevent close contact by making point contact instead of contact, and to manage the type of spikes by combining letters, symbols and figures.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a spike S according to the first aspect of the present invention, in which a cylindrical anti-slip member 2 made of a superalloy is attached to a recess in the upper portion of a shank 1 made of steel and having a diameter of 6 mm. At the lower end, a flange 3 is formed which has a bulge in the diameter direction, which is approximately twice the diameter of the shank 1 and acts as a retaining member. The flange lower surface 4 of this flange has a radius of 0.5 mm as shown in FIG. The three hemispherical projections are arranged at equal intervals on the same circumference having a diameter of 6 mm. The method of manufacturing the projection is to place a round bar material such as carbon steel in a predetermined mold and perform stamping to plastically deform the shank and flange to form a part corresponding to the projection in advance in the mold. You can leave it. When the spikes were actually soaked in a surface treatment agent and then dried, no adhesion occurred at all, and good surface treatment was performed on all products, and it was not necessary to select good products. The adhesion between the spike and rubber after vulcanization of the rubber chain was also good.

FIG. 3 (a) is a view showing the lower surface of the flange of the second embodiment of the present invention. In this embodiment, as shown in the JJ cross section of FIG. 3B, characters, symbols and figures are arranged in a single letter and double letters on the lower surface of the flange with a ridge having a radius of 0.5 mm to form the protrusion. Similarly, when the spikes were actually soaked in a surface treatment agent and then dried, no adhesion occurred and all products had good surface treatment, and it was not necessary to select good products. Further, in the present embodiment, a non-slip member made of cemented carbide is arranged on the spike, but if there is a request not to damage the road surface, a spike not using this is also used as a spaghetti type spike. You may.

[0014]

As is apparent from the above description, in the spike according to the present invention, the protrusion is provided on the lower surface of the flange, so that the spike is dipped in the surface treatment agent and then dried. Even if the lower surfaces of the flanges do not come into close contact with each other and a uniform surface treatment can be performed, it is not necessary to select defective products as in the conventional case, so that productivity can be improved.

Further, a width of 0.1-2.
Even if the spikes are dipped in the surface treatment agent by arranging one or more letters, symbols and figures with a ridge of 0 mm and a height of 0.1 to 2.0 mm as a contour, the lower surfaces of the flanges are in surface contact with each other. Instead of making point contact with each other to prevent close contact, it is possible to manage the type of spikes by combining letters / symbols and figures, which improves productivity and facilitates quality control.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a lower surface of the flange of the first embodiment of the present invention.

FIG. 3 is a view (a) of a lower surface of a flange showing a second embodiment of the present invention and an enlarged view (b) of a JJ cross section thereof.

[Explanation of symbols]

 S spike 1 shank 2 anti-slip member 3 flange 4 flange lower surface 5 protruding ridge 6 rubber 7 ridge

Claims (3)

[Claims] 1. A tire in which a non-slip member made of cemented carbide is attached to the upper end of a steel shank, and a lower end is integrally formed with a flange that largely bulges in the diametrical direction to prevent slipping out. In a spike for a rubber chain, the width of the flange lower surface of the flange is 0.1 to 0.1 mm.
A spike for a rubber chain, which has a protrusion of 2.0 mm and a height of 0.1 to 2.0 mm. 2. The spike for a rubber chain according to claim 1, wherein the shape of the protrusion is substantially hemispherical. 3. A tire in which a non-slip member made of a cemented carbide is attached to the upper end of a steel shank, and a flange having a large diametrical swelling preventing action is integrally formed at the lower end. In a spike for a rubber chain, a width of 0.1-2.
A spike for a rubber chain, which is characterized by arranging one or more characters, symbols, and figures each having a ridge of 0 mm and a height of 0.1 to 2.0 mm as an outline.