JPH07106682B2 - Tire anti-skid device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tire slip prevention device which is mounted on the outer periphery of a tire and prevents the tire from slipping when the vehicle is traveling.

BACKGROUND ART AND MEASURES TO BE SOLVED As a vehicle tire anti-skid device used during snowfall or the like, a metal chain mounted on the outer circumference of a tire is generally used. However, the metal chain has drawbacks that it is cumbersome to install, makes a lot of noise during traveling, and causes the chain to hit the vehicle body during traveling and damage the vehicle body.

In order to eliminate this defect, a tire anti-slip device made of rubber, synthetic resin or the like is used. In these anti-skid devices, it is preferable to attach spikes in order to reduce slippage on the road surface.

However, since the tire anti-slip device wound around the tire outer circumference has a slight gap between the tire outer circumference and the tire outer circumference when traveling, the rear surface of the tire anti-slip device wears due to relative movement with the tire outer circumference, and The wall thickness is reduced and the spike support strength is reduced. If a canvas is embedded to reinforce the spike, it will be exposed.

The present invention has been made in view of the above facts, and an object thereof is to obtain a tire anti-skid device that can maintain the strength of a spike support portion.

[Summary and Action of the Invention] The present invention is a tire anti-slip device including an anti-slip body arranged on the outer periphery of a tire, which is embedded in the anti-slip body and integrally formed with a flange portion and the flange portion. Is provided at a portion corresponding to the flange portion of the tire contact surface of the anti-slip body, and the mountain-shaped spike having a pin body portion having a tip protruding toward the road surface contact surface side of the anti-slip body. And a thick projection. Therefore, even if the tire contact surface of the non-slip body is worn due to friction with the tire, the spike support portion can maintain a sufficient thickness and the spike support strength can be secured.
The present invention is particularly suitable when the anti-slip body is made of rubber.

[Embodiment of the Invention] FIGS. 1 and 2 show a tire slip prevention device 10 according to a first embodiment of the present invention. As shown in FIG. 3, the tire anti-skid device 10 has rubber filled in the outer peripheries of the outer frame forming reinforcing cords 12 and 14 and the small frame forming reinforcing cords 16 and 18,
It is adapted to form a body 20 in which these cords are encapsulated. As the reinforcing cord, a synthetic resin such as nylon or tetron or a metallic cord can be applied.

The main body 20 is continuously formed in a hexagonal shape in the direction of arrow A, and is wound around the tire outer periphery (not shown). Further, a rubber protrusion 22 is extended at the tip of the tortoise shell in a direction perpendicular to the direction of arrow A of the main body 20, and a mounting hole is attached to the protrusion 22.
24 are drilled. The mounting hole 24 is for inserting a mounting wire, a hook, or the like (not shown) at the time of mounting to the tire.

Explaining the arrangement shape of the reinforcing cords in this embodiment, the outer frame forming reinforcing cords 12 and 14 are the outer frame portion 2 of the main body 20.
Reinforcement cords 12 and 14 for forming outer frame that pass through only 0A
Are arranged in a sine curve at the same cycle. In this sine curve-shaped maximum amplitude portion, it goes around the mounting hole 24 and proceeds. Mounting holes 24 when molding the tire anti-skid device 10
Since the pin is projected from a molding die (not shown), it is possible to easily enclose it in the rubber by arranging the intermediate portion of the reinforcing cords 12 and 14 for forming the outer frame around the pin in a loop shape. In the sine curve-shaped minimum amplitude portion, the outer frame forming reinforcing cords 12 and 14 are arranged so as to intersect with each other.

In the outer frame part 20A, a small hexagonal shape similar to the outer frame part 20A is formed, and a small frame forming reinforcing cord 16 is formed in the pair of first small frame parts 20B partially overlapping the outer frame part 20A. 18 are arranged. The small frame forming reinforcing cords 16 and 18 are also arranged in the main body 20 in a sine curve shape like the outer frame forming reinforcing cords 12 and 14, but the amplitude thereof is the outer frame forming reinforcing cords.
Reinforcement cord 1 for outer frame formation that is smaller than 12,14 and has a cycle
It is about 1/2 of 2,14.

Therefore, the small frame forming reinforcing cords 16 and 18 move while intersecting with each other at the intersections of the outer frame forming reinforcing cords 12 and 14 and their intermediate points.

Therefore, the first small frame portion 20B forms a pair of tortoise shell portions inside the outer frame portion 20A, and the remaining portion of the first small frame portion 20B in the main body 20 serves as a diamond-shaped second small frame portion 20C. There is.
The second small frame portion 20C is formed so that a part thereof overlaps with the first small frame portion 20B and another part thereof overlaps with the outer frame portion 20A.

A large diameter portion 26 is formed in a part of the main body 20, and a spike 28 is embedded in the large diameter portion 26.

The spike 28 has a cylindrical shape as shown in FIGS.
The large diameter portion 26 projects slightly toward the road surface side end portion to form a ground contact portion. Further, the opposite road surface side of the spike 28, that is, the tip end portion embedded in the large diameter portion 26 is made into the large diameter flange portion 30, and the main body 20
It has been removed from.

Further, a canvas 32 is enclosed in the main body 20 in correspondence with the flange portion 30 to prevent the spike 28 from slipping out to the opposite road surface side.

Corresponding to the flange 30 and canvas 32 of this spike 28, the main body
A protrusion 33 is formed on the back surface of the body 20, and the main body 20 in this portion is made thick. The protrusion 33 has a circular plan shape and a trapezoidal cross section with chamfered portions to prevent the protrusion 33 from entering the tire groove when mounted on the tire. The protrusion height of the protrusion 33 may be about 1 m / m.

As shown in FIG. 5, the body 20 has spike insertion holes 34 formed during molding. It is preferable that the spike insertion hole 34 has a diameter-expanded portion 36 at the bottom thereof in conformity with the shape of the spike 28. However, a straight spike insertion hole 34 that does not have the expanded diameter portion 36 may be used.

In the present embodiment, the spike 28 has a total height of 8 mm and a diameter D ₂ of 5
mm, flange diameter D ₁ is 8 mm, inner diameter d of spike insertion hole 34
₂ is 2 mm, and the inner diameter d ₁ of the expanded diameter portion 36 is 4 mm. The relationship is that the diameter D ₁ is (2-2.5) times the inner diameter d ₁ and the diameter D ₂ is the inner diameter d 1.
It is preferably ₂ (2 to 2.5) times. The relationship between the spike 28 and the outer diameter D ₃ of the main body large diameter portion 26 is preferably such that the outer diameter D ₃ is (2 to 2.5) times the diameter D ₁ .

On the other hand, as shown in FIGS. 6 and 7, the spike 28 is preferably provided with a hook portion 38 at the flange portion 30. This hook
Denoted at 38 are projections protruding from the outer peripheral end of the flange portion 30 toward the road surface side, and a plurality of protrusions 38 are provided around the flange portion 30. Therefore, these hooks 38 engage with the top surface of the expanded diameter portion 36 of the spike insertion hole 34 when a force acts in the direction of withdrawing from the main body 20, and ensure the spike 28 is prevented from coming off.

In the cross section shown in FIG. 4, the outer frame forming reinforcing cord 12 and the small frame forming reinforcing cord 16 are arranged on the road surface side with respect to the flange portion 30 with the spikes 28 attached. Therefore, when the spike 28 receives a pulling force toward the road surface, the outer frame forming reinforcement cord 12 and the small frame forming reinforcement cord 16 correspond to the flange portion 30 and prevent the retaining. Therefore, in addition to the hook portion 38 of the flange portion 30, the spike 28 is more reliably prevented from coming off. The outer frame forming reinforcing cord 12 and the small frame forming reinforcing cord 16 are not limited to both sides of the spike 28 as shown in FIG. 4, but may be arranged on one side of the spike 28.

The spikes 28 are appropriately provided in necessary parts of the main body 20, but depending on the mounting location of the spikes 28, the reinforcing cords may not be arranged on both sides of the spike 28, but even if the reinforcing cords are arranged only on one side, the flange portion Anything can be used as long as it is buried on the road side of 30. Alternatively, the reinforcing cord may be wound around the spike to form a loop.

Next, a procedure for manufacturing the tire antiskid device 10 in this embodiment will be described.

In the molding die of the main body 20, a rubber injection space is formed in a portion corresponding to the main body 20. Further, the pins project in correspondence with the mounting holes 24. Therefore, the reinforcement cords for forming the outer frame 12,1
4 is arranged so as to be hung over these rubber injection spaces and pins, and is also provided with an outer frame forming reinforcement cord 14 and a small frame forming reinforcement cord 16.
Are also placed in the same way.

Here, if the mold is filled with rubber, the main body 20 in which the reinforcing wire is arranged is formed. In particular, the wires 12, 14, 16 and 18 are enclosed over the entire area of the main body 20, so
20 reinforcements are reliable.

In this case, the spike 28 has not yet been inserted into the spike insertion hole 34 in the state after molding as shown in FIG.
The spike insertion hole 34 is formed by protruding a pin having the same shape as the spike from a part of the molding die,
At the time of mold release after filling with rubber, this pin is pulled out from the spike insertion hole 34 to form the spike insertion hole 34 and the enlarged diameter portion 36 of FIG.

For this reason, after molding, the spike insertion hole 34 is expanded by elastic deformation using a jig (not shown), the spike 28 is dropped, and the spike insertion hole 34 is reduced in diameter again, as shown in FIG. Spike 28 is securely inserted into 34. A rubber-based adhesive is dropped into the insertion hole 34 as needed.

The manufacturing procedure is not limited to the above-mentioned means, and the reinforcing cord may be sandwiched between unvulcanized rubber sheets, punched into the shape shown, and then vulcanized in the mold.

At the time of use, the tire anti-slip device 10 is mounted on the outer circumference of the tire, and the tire anti-slip device 10 is installed on the outer circumference of the tire by attaching wires (not shown), hooks or the like to the mounting holes 24.
Reference numeral T shown in FIG. 1 indicates a corresponding position of the tire shoulder portion when the main body 20 is attached to the tire.

The mounting force acting on the mounting hole 24 is the outer frame portion 20A, the first small frame portion 20B.
Since it has a turtle shell shape, it will give appropriate tension,
The tire slip prevention device 10 surely adheres to the outer circumference of the tire.

During traveling, the road surface of the main body 20 and the protrusions of the spikes 28 serve as a ground contact surface to prevent tire slippage. In particular, the ladder portion 20D arranged at right angles to the traveling direction is effective in improving climbing force and braking force. Since the main body 20 is a combination of large and small turtle shells, the step difference on the outer circumference of the tire is small and vibration during traveling is small.

When running on a dry road surface, the spikes are pushed into the main body 20,
The tip pin will be retracted (the rubber on the back side will expand toward the tire), and the pin will be ejected as it was molded during running on snow. Therefore, there is no damage to the dry road surface due to spikes and no dust.

As described above, the spike 28 surely secures the hook portion 38 to the main body 20.
The spike 28 is prevented from falling off the main body 20 because the spike 28 is retained by the reinforcing cord disposed on the road surface side of the flange portion 30. Also the flange part
The canvas 32 is arranged on the side opposite the road surface of 30, so the spike
28 does not sink into the tire. This canvas 32
In place of the above, another slip-out preventing material such as two tire blind cords stacked to achieve the same action as the canvas 32 can be applied.

The main body projection 33 of the canvas 30 portion relieves the stress due to the axial force of the spike 28 during traveling and improves durability.
In addition, the wear margin with the tire is large, which improves durability.

In this embodiment, the tire running direction with respect to the tire anti-skid device 10 is the direction of arrow A, and the longitudinal direction of the outer frame portion 20A is inclined with respect to this, so that the twisting force acting on the spike 28 of the outer frame portion 20A is It acts diagonally with respect to the longitudinal direction and has a great effect of preventing the spike 28 from coming off.

Further, since the main body 20 is provided with the turtle shell type small frame portion 20B and the small frame portion 20C inside the outer frame portion 20A, it is difficult for the main body 20 to be displaced from the tire outer periphery, and even if a displacement occurs, proper mounting is naturally performed. It acts to return to the state.

In this embodiment, the first small frame portion 20B has a hexagonal shape, but the second small frame portion 20C may have a hexagonal shape.

FIG. 8 shows the second embodiment of the present invention, which is a modification of the spike 28. In this embodiment, an indentation 42 is formed on the flange portion 30 of the spike 28 with a chisel (not shown), so that a raised portion 44 is provided. Therefore, these raised portions 44 function as projections similar to the hook portions 38 of the first embodiment.

Further, in the third embodiment of the present invention shown in FIG. 9, chisel driving 46 is driven along the circumferential direction of the flange portion 30, so that the raised portion 48 is tangential to the flange portion 30. Are arranged in the direction. This raised portion 48 also has a function as a protrusion similarly to the raised portion 44 of the above-mentioned embodiment, and can penetrate into the top surface of the expanded diameter portion 36 shown in FIG.

FIG. 10 shows a fourth embodiment of the present invention. The spike 28 of this embodiment differs from the first embodiment in that a hook portion 38 is formed on the entire circumference of the flange portion 30.

In each of these examples, the shape in which the hook portion or the like is formed on the flange portion is shown, but the hook portion may protrude toward the side surface of the flange portion, that is, in the radial direction.

FIG. 11 shows the spike 28 of the fifth embodiment of the present invention. The spike 28 has a ring-shaped protrusion 50 having a diameter slightly smaller than that of the flange portion 30 in the middle portion, so that the attachment strength to the main body 20 is secured.

In the sixth embodiment shown in FIG. 12, the projection 50 is formed continuously in the axial direction and has the same shape as that in which the annular groove is formed.

In the seventh embodiment shown in FIG. 13, the projection 50 has a spiral shape and is in a threaded state.

In each of the above embodiments, the number of reinforcing cords used can be changed arbitrarily. For example, outer frame forming reinforcement cord 12,
14, two small frame forming reinforcing cords 16 and 18 may be used, and in this case, these two cords may be arranged on both sides of the spike as shown in FIG.

Further, the main body is not limited to one filled with rubber, and other elastic elastomer can be used.

[Effects of the Invention] As described above, the tire antiskid device according to the present invention is
Since the back surface of the main body in which the spikes are embedded is partially projected to have a large thickness, it has an excellent effect of maintaining the strength of the spike support portion.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a tire anti-skid device according to the present invention, FIG. 2 is a perspective view of FIG. 1, and FIG. 3 is a plan view showing a wire arrangement state in the first embodiment. 4 is the first
Fig. IV-IV line sectional view, Fig. 5 is a sectional view showing a state before insertion of spikes, Fig. 6 is a front view of spikes, Fig. 7 is a plan view of spikes, and Figs. Second invention
FIG. 10 is a perspective view of a spike showing the embodiment and the third embodiment, FIG. 10 is a sectional perspective view of the spike showing the fourth embodiment, and FIGS.
FIG. 13 is a sectional view corresponding to FIG. 4 showing the fifth to seventh embodiments of the present invention. 10 …… Tire slip prevention device, 20 …… Main body, 28 …… Spike, 30 …… Flange part, 32 …… Saving cloth, 33 …… Protrusion.

Claims (1)

[Claims] 1. A tire anti-skid device comprising an anti-slip body arranged on the outer periphery of a tire, the tire anti-slip device being embedded in the anti-slip body, integrally connected to a flange portion and the flange portion, and having a tip end. A mountain-shaped spike provided with a pin body portion projecting to the road surface contact surface side of the non-slip body, and a thick protrusion provided on a portion of the tire contact surface of the non-slip body corresponding to the flange portion, An anti-skid device for tires, comprising: