JPH027049Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spike pin attachment structure for a non-slip device for automobile tires. This anti-skid device is an alternative to the metal snow chains that are conventionally used on the circumference of automobile tires on snowy or frozen roads.
It surpasses these in many aspects such as noise, storage, and handling of installation work, and its shape is
A group of mold bodies made of rubber-like elastic bodies are connected in parallel. Due to multifaceted requirements such as securing braking force and driving force, as well as maintaining wear resistance, anti-skid devices made of rubber-like elastic bodies are used at the ground-contacting part of the main body.
It is necessary to secure the spike pin to the grounding part of the non-slip device body. At this time, when a highly stable and strong attachment of the spike pin to the rubber-like elastic body is desired, flanges are provided at both ends, and with this pair of flanges, both sides of the non-slip body are attached. One of the most desirable is a spike pin with a shape that allows it to be pinched.

The present invention proposes a desirable mounting structure for this flanged spike pin to the main body of an automobile tire skid.

(Prior art) When installing a spike pin, the spike pin itself is buried in the anti-slip device body, and the spike pin is fixed to the tire-side contact surface of the anti-slip device body without being exposed at all, or It is very common to have a pair of flanges provided on both sides that sandwich both sides of the non-slip device.

(Problems to be solved by the invention) Regarding a spike pin mounting structure in which the spike pin is buried in the anti-skid device body and the spike pin is not exposed at all on the tire contact surface side of the body, The manufacturing process was quite complicated, and the spike pins tended to come off while driving, which was dangerous, and there were concerns that the anti-skid device would not be able to sufficiently exert the braking and driving force required. .

In addition, in the case of a flanged spike pin mounting structure in which a pair of flanges are sandwiched and exposed on both sides of the anti-skid device body, the presence of one side flange that is largely exposed on the tire contact surface side of the anti-skid device body is particularly important. While driving, especially when driving uphill at low speeds of 20 to 30 km/h, a large misalignment occurs between the anti-skid device and the tire, and in this case, the spike pin located on the tire contact side of the main unit Frequently, the flange of the tire got caught in the tire pattern, siping, main groove, etc., damaging the tire and further damaging the anti-skid device itself.

In this way, although the flange is effective in firmly attaching the spike pin to the anti-skid device body, the existence of the flange, especially the flange located on the tire contact surface side of the main body, leaves problems that need to be solved in other respects. There is. An object of the present invention is to provide a structure for attaching a spike pin to a non-slip device for an automobile tire, which solves the above-mentioned problems of the flanged spike pin.

(Means for solving the problem) In order to achieve this objective, the present invention has the following configuration. That is, the spike pin mounting structure of the anti-skid device for automobile tires according to the present invention is as follows:
A spike pin with a pair of flanges on both ends,
When clamping and fixing both sides of the anti-skid device with the pair of flanges at the ground-contacting part of the anti-skid device body, which has a rubber-like elastic body as a base, the flange of the spike pin located on the tire side touches the anti-skid device main body. It is characterized by being completely inserted into a concave counterbore formed on the tire contact surface side.

(Function) In the present invention, the flange portion of the spike pin is fitted into a counterbore formed on the tire contact surface side of the anti-skid device body, and the flange portion is held by the counterbore. To ensure that the spike pin sinks, or when there is a misalignment between the tire and this anti-skid device, the tire and main groove that occur when the flange directly contacts the tire pattern, siping, main groove, etc. of the tire. By setting the depth of this counterbore to be sufficiently larger than the thickness of the flange, it is possible to avoid damage to the non-slip device, and by setting the depth of this counterbore to be sufficiently larger than the thickness of the flange, the spike pin may suddenly strike the spike pin due to hitting a protrusion or other unexpected cause. When a heavy load is applied to the spike pin, the counterbore absorbs the deformation and can sink to the point where the flange end of the spike pin hits the tire, so the spike pin can cause more damage to the road than necessary. can be avoided.

(Example) Next, a specific example of the spike pin attachment structure of the anti-slip device for automobile tires according to the present invention will be described with reference to the drawings.

FIG. 1 is a central longitudinal cross-sectional view of a spike pin fixed to the main body of the anti-skid device, FIGS. 2 to 4 are views corresponding to FIG. 1 showing other embodiments, and FIG. FIG. 6 is a plan view showing a part of the anti-slip device with pins fixed thereon, and FIG. 6 is a view of the anti-slip device mounted on a tire. The anti-skid device body 1 has a European letter I-shaped body 2 in plan view that provides excellent braking and driving force in the straight-ahead direction, and a European letter X-shaped body 2 in plan view that provides excellent riding comfort and skidding braking force. The mold bodies 3 are arranged alternately in the circumferential direction of the tire, and these mold bodies 2 and 3 are formed in series from a rubber elastic body such as rubber or synthetic resin with a strip-shaped core embedded inside. has been done. On the contact surface side of the non-slip main body 1, which is composed of these molded bodies 2 and 3, there are four groups of convex pieces to improve the gripping force. A flanged spike pin 5 with excellent wear resistance and wear resistance is arranged and fixed. This spike pin 5 has a pair of flanges 7, 7 at both ends of its iron body 6, and of the pair of flanges, the center of the flange 7 located on the ground side is made of wear-resistant cemented carbide. Tapered tip 8
is embedded with its tip partially protruding. Of the flanged spike pins 5, the flange 7 located on the tire side is fitted into a concave counterbore 10 formed on the tire contacting surface side of the antiskid device body 1.

This counterbore 10 is formed by providing a recess 11 in a part of the tire contacting surface of the skid stopper main body made of a rubber-like elastic body (see Fig. 1), or by providing a recess 11 on one surface. By attaching a rubber-like elastic piece 12 to the tire contacting surface side of the anti-skid device main body 1 (see Fig. 2), a lever-shaped annular frame 13 is integrated with the main body 1 on the tire contacting surface side of the main body. By forming a protruding shape (see Fig. 3), or by adhering a protruding annular frame piece 14 made of a rubber-like elastic material to the tire contact surface side of the main body (see Fig. 3). (See Figure 4).

Moreover, the shape of this counterbore 10 is circular in plan view,
An elliptical shape, a polygon including a triangle, etc. can be selected as appropriate, and the partial cross-sectional shape of the annular frames 13 and 14 forming the counterbore shown in FIGS. 3 and 4 can be square, A triangular shape, a semicircular shape, etc. can be selected as appropriate.

Note that among the counterbore 10 and the spike pin 5, the minimum diameter of the counterbore 10 of the flange 7 located on the tire contact surface of the anti-slip device body 1 is W ₁ ,
When the depth is set as H ₁ , the outer diameter of the flange of the spike pin 5 is set as W, and its thickness is set as H, W ₁ and W,
Between H ₁ and H: 1.0≦H ₁ /H≦2.0, 1.0≦W ₁ /W
The condition is set as ≦1.3.

That is, the depth of the counterbore 10 is desirably equal to or greater than the thickness of the flange 7 of the spike pin 5.

In the relational expression 1.0≦H ₁ /H≦2.0, when the ratio of H ₁ /H becomes 2.0 or more, in the embodiment illustrated in FIG. The toughness cannot be ensured, making it easy to damage, and as the thickness of the main body becomes thinner, the lateral tightening force decreases. On the other hand, if the ratio H ₁ /H is less than 1.0, the flange portion will catch on the tire pattern, making the tire more likely to be damaged. Furthermore, in the relational expression 1.0≦W ₁ /W≦1.3,
If the ratio of W ₁ /W is 1.3 or more, the original purpose of providing the counterbore 10 cannot be achieved, the flange tends to get caught in the tire pattern, and foreign matter such as mud and sand can become trapped in this seat. It becomes easy to get clogged in 10 parts of the hole. On the other hand, the ratio of W ₁ /W is 1.0
In the following cases, fixing the spike pin becomes difficult.

The above two relational expressions are based on the JAIS standard dry road of 200 km for automobiles equipped with automobile tire skids equipped with flanged spike pins according to the present invention.
The durability test was carried out at W ₁ /W = 1.3, that is, W ₁ = 13.
mm, W=10mm, H=15mm, counterbore 1
The condition of the tire and skid device was observed at every 0.5 mm from 0.5 mm to 4.0 mm at the depth of the 0 part, and the results were as shown in Figure 7.

(Effects of the invention) The invention provides a counterbore on the tire contact surface side of the anti-skid device body, and the flange of the flanged spike pin located on the tire side is completely enclosed in the counterbore. By inserting the
The presence of this counterbore prevents damage to the flange of the tire, especially the tire pattern and sipes, and damage to the tire due to the movement that occurs between the anti-skid device and the tire, when it gets caught in the main groove, and damage to the anti-skid device itself. In addition, when driving on a hard road surface, the spike pin part sinks easily due to the presence of this counterbore, which reduces road damage caused by the spike pin. You can expect another effect. When forming the counterbore, as shown in FIG. 1, the counterbore can be formed integrally with the main body of the anti-skid tool, so it is easy to form the counterbore, and the rubber-like elastic piece shown in FIG. 2 can be used. As a result, the wall thickness of the anti-skid device body can be reduced accordingly, and its braking performance, driving performance, storage property, and ease of installation work can be improved.
By using the peg-shaped annular frame illustrated in the figure, there is no need to reduce the wall thickness of the skid stopper body more than necessary, so the horizontal tightening force of the spike pin can be secured accordingly. .

[Brief explanation of the drawing]

FIG. 1 is a central longitudinal cross-sectional view of a spike pin fixed to the main body of a skid stop device according to the present invention, and FIGS. 2 to 4 are views corresponding to FIG. 1 showing other embodiments, and FIG. Fig. 5 is a plan view showing a part of the anti-slip device with spike pins fixed thereon, Fig. 6 is a view of the anti-slip device attached to a tire, and Fig. 7 is a plan view of the non-slip device according to the present invention. This is a graph showing the results of a 200 km running test of a tire equipped with a stopper. In the figure, 1 is the non-slip device body, 5 is the spike pin, 7
is a flange, 10 is a counterbore, 11 is a recessed part, 12
is a rubber-like elastic piece, 13 is an annular frame, 14 is an annular frame piece, W ₁ is the minimum diameter of the counterbore, H ₁ is the depth of the counterbore,
W indicates the outer diameter of the flange, and H indicates the thickness of the flange.

Claims (1)

[Claims for Utility Model Registration] (1) A spike pin having a pair of flanges at both ends is held by the pair of flanges at the grounding part of the main body of the skid device whose base is a rubber-like elastic body. When clamping and fixing both sides of the main body, the flange of the spike pin located on the tire side is completely inserted into the concave counterbore formed on the tire contacting surface side of the anti-skid main body. A spike pin mounting structure for a non-slip device for automobile tires. (2) As mentioned above, when the minimum diameter of the counterbore is W ₁ , the depth is H ₁ , the outer diameter of the flange located on the tire side of the spike pin is W, and the thickness is H, W ₁ and W, H ₁ and H 1.0≦H ₁ /H≦2.0 1.0≦W ₁ /W≦1.3 The spike pin mounting structure for an automobile tire skid device according to claim 1, which is a utility model registration claim, has the following relationship between them. (3) The antiskid device for automobile tires according to claim 1 or 2, wherein the counterbore is formed by providing a recessed portion in a main body made of a rubber-like elastic body. Spike pin mounting structure. (4) The counterbore is formed by attaching a rubber-like elastic piece with a recessed portion on one side to the tire-side contact surface of the main body.
A spike pin attachment structure for the anti-slip device for automobile tires according to item 1 or 2. (5) The vehicle according to claim 1 or 2, wherein the counterbore is formed by protruding a lever-shaped annular frame integrally with the main body on the tire-side contact surface of the main body. Spike pin mounting structure for anti-slip devices for tires. (6) The above-mentioned counterbore is on the tire side contact surface of the main body,
A spike pin attachment structure for an automobile tire skid device according to claim 1 or 2, which is formed by adhering a ring-shaped frame piece made of a rubber-like elastic body. (7) The planar shape of the counterbore is circular, oval,
A spike pin mounting structure for an automobile skid stopper according to one of claims 1 to 6 of the utility model registration claim, which is formed to have any one polygonal shape. (8) The partial cross-sectional shape of the fort-shaped annular frame formed protrudingly on the tire-side contact surface of the main body forming the counterbore may have one of a rectangular, triangular, and semicircular shape. A spike pin mounting structure for an automobile tire skid device according to claim 5 or 6 of the utility model registration claim.