JPH09142111A - Tire and skid stopping member for tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a road surface from being damaged by a tire, make the tire give high anti-skid performance in a snow-covered road or a frozen road, and manufacture the tire easily. SOLUTION: A belt-like anti-skid member 10 consisting of a synthetic resin is buried in a tread 2 of a tire 1 in such a manner that it extends along the circumferential direction of the tire 1. The anti-skid member 10 is provided with a slender, belt-like base part 11 and a great many of pectinate projections 12 projecting almost vertically from both sides of the base part 11. The respective projections 12 extend along the direction almost perpendicular to the ground touch surface of the tread 2, and their tip ends are projected a little from the ground touch surface of the tread 2. Since the projections 12 pierce into the snow-covered road or ice-frozen road, high anti-skid performance is given when the tire 1 runs on such a road. Since the anti-skid member 10 is made of a synthetic resin, it scarcely cause damage to an ordinary asphalted road surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire suitable for traveling on a snowy road, an icy road or the like, and a non-slip member for a tire.

[0002]

2. Description of the Related Art Conventionally, when a vehicle travels on a snowy road, an icy road, or the like, a tire chain is attached to a tire or a spike tire is used.

[0003]

However, although the tire chain and the spike tire have excellent anti-slip performance, they have the following problems. Tire chains are disadvantageous in terms of useful life, noise, and riding comfort of automobiles for running on a normal road surface, and are difficult to attach and detach to and from tires. On the other hand, the spiked tire has an excellent anti-slip performance especially on an icy road surface, but the road surface is damaged by the metal spike pin, and the dust caused by the damage is a problem.
Moreover, the work of driving a large number of spike pins into the tread portion of the tire is troublesome.

Therefore, in order to solve the above problems,
In recent years, studless tires have been actively developed. This studless tire has a tread portion made of rubber that does not cure even at low temperatures, and has a unique tread pattern such as a very thin sipe. The soft rubber of the tread portion increases the contact area with the road surface to increase the adhesive frictional force, and the edge effect of the tread pattern improves the anti-slip performance on a snowy road or an icy road.

However, with the studless tires, the anti-slip performance on snowy roads was quite close to that of the above-mentioned tire chains and spike tires, but the anti-slip performance on icy roads was not yet sufficient.

An object of the present invention is to provide a tire and an anti-skid member for a tire, which can not only damage the road surface but also exhibit high anti-slip performance in a snowy road and an icy road, and can be easily manufactured. It is in.

[0007]

In order to achieve the above object, in the tire invention of claim 1, in the tread portion,
A belt-shaped non-slip member made of a non-metallic material and harder than the tread rubber is embedded so as to extend along the circumferential direction of the tire, and the anti-slip member extends along a direction substantially orthogonal to the ground contact surface of the tread portion. Equipped with a large number of tooth-shaped protrusions,
The tip of each protrusion is projected from the grounding surface of the tread portion.

[0008] In the invention of claim 2, in claim 1,
The anti-slip members are arranged in a plurality of rows in the axial direction of the tire. According to a third aspect of the present invention, in the first or second aspect, the anti-slip member is made of synthetic resin.

According to a fourth aspect of the present invention, there is provided a tire non-slip member, which is made of a non-metallic material and has a belt-shaped base portion and a large number of comb-teeth-shaped projections protruding from the base portion. Therefore, according to the invention of claim 1, the projection of the anti-slip member protruding from the ground contact surface of the tread portion pierces the snowy road surface or the icy road surface, thereby exhibiting high anti-slip performance. Moreover, even if the tread rubber is worn, the anti-slip performance is maintained for a long time. In addition, since the anti-slip member is made of a non-metallic material, it hardly damages a normal asphalt road surface. Further, unlike driving a large number of protrusions into the tread portion, it is sufficient to embed a belt-shaped non-slip member having a large number of protrusions in the tread portion prior to molding the tire, which facilitates tire manufacturing. become.

According to the invention of claim 2, the anti-slip performance is further improved by the anti-slip members of a plurality of rows. According to the invention of claim 3, the anti-slip member can be easily molded from synthetic resin.

According to the invention of claim 4, by embedding such an anti-slip member in the tread portion of the tire, a tire having high anti-slip performance can be easily obtained without damaging the road surface. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tire and a non-slip member for a tire embodying the present invention will be described below with reference to FIG.
~ It demonstrates based on FIG.

FIG. 1 is a partially cutaway perspective view showing a tire 1 according to this embodiment. As shown in the figure, tire 1
Has a tread portion 2, a sidewall portion 3 and a bead portion 4. An annular bead wire 5 is provided in each bead portion 4.
Are arranged. The carcass cord 6 is the tread portion 2,
The beads 3 are arranged over the sidewall portion 3 and the bead portion 4, and both ends thereof are wound around and fixed to the bead wire 5. A breaker belt 7 is arranged on the outer periphery of the carcass cord 6 in the tread portion 2. A plurality of grooves 8 are formed on the outer circumference of the tread portion 2, and the grooves 8 form a tread pattern 9.

A belt-shaped non-slip member 10 made of a synthetic resin harder than tread rubber is embedded in the tread portion 2 so as to extend along the circumferential direction of the tire 1. The anti-slip members 10 are arranged in a plurality of rows (four rows in this embodiment, in other words four) in the axial direction of the tire 1. The slip prevention member 10 will be described in detail with reference to FIG.
Further, as shown in FIG. 3, the anti-slip member 10 has an elongated belt-shaped base portion 11 and a large number of comb-teeth-shaped projections 12 that project substantially vertically from both sides of the base portion 11. Each protrusion 1
The reference numeral 2 extends along a direction substantially orthogonal to the ground contact surface of the tread portion 2, and the tip thereof slightly projects from the ground contact surface of the tread portion 2. A large number of through holes 13 are formed in the base 11. By providing the through hole 13, the slip prevention member 10 embedded in the tread portion 2 is firmly integrated with the tread rubber.

Next, a method for manufacturing the tire 1 having the tread portion 2 as described above will be briefly described. As shown in FIG. 2, a belt-shaped rubber material 14 for forming the outer peripheral side portion of the tread portion 2 is prepared. This rubber material 14
Two wide belt-shaped second rubber members 16 each having two embedded anti-slip members 10 are attached to a wide belt-shaped first rubber member 15. The second rubber material 16 is configured, for example, by pouring liquid rubber into a mold (not shown) and curing the liquid rubber while the two anti-slip members 10 are arranged in the mold. At this time, the liquid rubber is the anti-slip member 1
It is hardened in a state where it enters into the large number of through holes 13 formed in the base portion 0 of 0. Therefore, the anti-slip member 10 is firmly integrated with the rubber forming the second rubber material 16.
Alternatively, the second rubber member 16 may be formed by sandwiching the two anti-slip members 10 from above and below with a band-shaped rubber and pressing them from above and below with a roller or the like.
Also in this case, the rubber enters the through hole 13 and the anti-slip member 10 is firmly integrated with the rubber. Next, the raw tire before vulcanization, which is formed by sticking the rubber material 14 configured as described above to the outer periphery, is vulcanized and molded using a known tire vulcanizer. As a result, as shown in FIG. 1, the tire 1 having the non-slip member 10 embedded in the tread portion 2 is completed.

Now, the tire 1 constructed as described above.
Is mounted on, for example, an automobile in order to appropriately travel on a snowy road or an icy road. In this embodiment, since the anti-slip member 10 made of synthetic resin is embedded in the tread portion 2, the following operational effects are achieved.

(1) The projections 12 of the anti-slip member 10 projecting from the ground contact surface of the tread portion 2 pierce a snowy road surface or an icy road surface, so that a high anti-slip performance is exhibited when traveling on those road surfaces.

(2) The tips of the protrusions 12 of the anti-slip member 10 are always maintained in a state of protruding from the ground contact surface of the tread portion 2 due to wear of the tread rubber. Therefore, even if the tread rubber is worn, the anti-slip performance is maintained for a long time.

(3) Since the anti-slip member 10 is made of synthetic resin, unlike the conventional metal spike pin in the spike tire, the projection 12 of the anti-slip member 10 damages a normal asphalt road surface. Almost never. In addition, noise when traveling on a normal road surface is suppressed.

(4) Different from driving a large number of protrusions on the tread portion, a belt-shaped non-slip member 10 having a large number of protrusions 12 is provided along the circumferential direction of the tire 1 prior to molding the tire 1. The tire 1 can be easily manufactured because it only needs to be embedded in the tread portion 2 so as to extend in the vertical direction.

(5) By disposing the anti-slip members 10 in a plurality of rows in the axial direction of the tire 1, the anti-slip performance is further improved. (6) The anti-slip member 10 can be easily molded from synthetic resin.

(7) By providing a large number of through holes 13 in the base portion 11 of the anti-slip member 10, the anti-slip member 10 embedded in the tread portion 2 can be firmly integrated with the tread rubber.

The present invention can be modified and embodied as follows. (1) For example, as shown in FIGS. 4 to 8, the shape of the non-slip member is different from that of the above-described embodiment. The anti-slip member 20 shown in FIG. 4 is provided with the protrusions 12 on both left and right sides of the base 11 displaced from each other as compared with the embodiment shown in FIG. In the anti-slip member 30 shown in FIG. 5, the protrusion 12 is substantially L-shaped as compared with the embodiment shown in FIG. FIG.
The non-slip member 40 shown in FIG.
Compared to 0, the protrusions 12 on the left and right sides of the base 11 are provided in a state of being displaced from each other. In the anti-slip member 50 shown in FIG. 7, the base portion 11 has a zigzag shape as compared with that of the embodiment shown in FIG. In the anti-slip member 60 shown in FIG. 8, the protrusions 12 are provided in one row with respect to the base 11 as compared with the embodiment shown in FIG. The tire 1 is provided with the anti-slip member shown in FIGS.
Even when it is embedded in the tread portion 2, the same effect as that of the above-described embodiment can be obtained.

(2) In each of the above anti-slip members,
The width of the base portion 11, the pitch of the protrusions 12 or the length of the protrusions 12 may be changed as appropriate according to the size of the tire 1. In addition, the number of arrangements of the anti-slip members 10 with respect to the tread portion 2 should be changed appropriately.

The technical ideas that can be understood from the above embodiment will be described below. (1) The tire according to any one of claims 1 to 3, wherein a large number of through holes are formed in the non-slip member.

With this configuration, the slip preventing member embedded in the tread portion can be firmly integrated with the tread rubber.

[0027]

As described in detail above, the present invention has the following excellent effects. According to the invention of claim 1, a high anti-slip performance is exhibited on a snowy road and an icy road, and the anti-slip performance is maintained for a long period of time. In addition, the normal asphalt road surface is hardly damaged, and noise during traveling is suppressed. Further, the tire is easy to manufacture.

According to the invention of claim 2, the anti-slip performance is further improved by the anti-slip members of a plurality of rows. According to the invention of claim 3, the anti-slip member can be easily molded from synthetic resin.

According to the invention of claim 4, by embedding such an anti-slip member in the tread portion of the tire, a tire having high anti-slip performance can be easily obtained without damaging the road surface. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment embodying the present invention.

FIG. 2 is a partial perspective view showing a rubber material for forming a tread portion.

FIG. 3 is a partial perspective view showing a non-slip member.

FIG. 4 is a partial perspective view showing another embodiment of the non-slip member.

FIG. 5 is a partial perspective view showing another embodiment of the anti-slip member.

FIG. 6 is a partial perspective view showing another embodiment of the non-slip member.

FIG. 7 is a partial perspective view showing another embodiment of the non-slip member.

FIG. 8 is a partial perspective view showing another embodiment of the non-slip member.

[Explanation of symbols]

1 ... Tire, 2 ... Tread part, 10 ... Anti-slip member, 1
DESCRIPTION OF SYMBOLS 1 ... Base part, 12 ... Protrusion, 13 ... Through hole, 20 ... Anti-slip member, 30 ... Anti-slip member, 40 ... Anti-slip member, 50 ...
Anti-slip member, 60 ... Anti-slip member.

Claims (4)

[Claims] 1. A belt-shaped non-slip member made of a non-metallic material and harder than tread rubber is embedded in the tread portion so as to extend along the circumferential direction of the tire, and the anti-slip member serves as a ground contact surface of the tread portion. A tire having a large number of comb-teeth-shaped projections extending in a direction substantially orthogonal to each other, and the tips of the projections protruding from the ground contact surface of the tread portion. 2. The tire according to claim 1, wherein the anti-slip members are arranged in a plurality of rows in the tire axial direction. 3. The tire according to claim 1, wherein the anti-slip member is made of synthetic resin. 4. A non-slip member for a tire, which is made of a non-metallic material and has a strip-shaped base and a large number of comb-teeth-shaped projections protruding from the base.