JP2001270308A - Tire with claw tool for preventing slip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire with a claw tool for preventing slip by contacting with a road surface at braking and by not contacting therewith at normal travelling. SOLUTION: This tire is provided with the claw tool for preventing slip arranged on the tip end of a tread positioned between two tread grooves. The claw tool is provided with a body part embedded in the tip end of the tread and a claw part with the tip exposed outside of the tread so that the tip end is slightly positioned upward from the road surface at a vehicle stop and normal travelling. At the vehicle braking, the vehicle is applied the brakes by deforming the tread and being engaged the claw part in the road surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates generally to tires. More specifically, the present invention relates to a tire having a slip prevention claw that comes into contact with a road surface during braking and does not contact the road surface during normal running.

[0002]

2. Description of the Related Art Conventionally, in snowy and cold regions where the road surface freezes, vehicles have been running with spiked tires during the winter period. However, when the vehicle is run with spiked tires, the spike pins are always exposed. Therefore, when traveling on a dry road surface or a road surface with little snow, the spike pins scrape the road surface, causing damage such as generation of dust.

[0003] In order to eliminate such adverse effects, the "Law Concerning the Prevention of Spike Tire Dust Generation" was enforced in June 1990, and the use of spike tires was restricted except in some areas. It became a thing. After the use of such spiked tires is regulated, studless tires for braking on snow-covered roads or frozen roads using rubber or tread patterns have been developed and spread.

[0004]

However, studless tires have a lower braking force than spike tires, so that slip accidents on frozen roads are not unending.
In addition, the spread of studless tires has caused a problem that snow that has once melted due to friction between the tires and the road surface is frozen again, that is, black ice burn occurs.

On the other hand, as described in, for example, Japanese Patent Application Laid-Open No. 2-258403, a tire has been proposed in which spike pins are inserted and removed according to the condition of the road surface. However, this tire has a problem that the structure is complicated and the production and mounting are troublesome, resulting in high cost and the like.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tire provided with a slip preventing claw that comes into contact with a road surface during braking and does not contact the road surface during normal running.

[0007]

According to a first aspect of the present invention, there is provided a tire provided with anti-slip pawls provided at a tip of a tread located between two tread grooves. The claw has a body portion embedded at the tip of the tread, and a claw portion exposed to the outside of the tread so that the tip is located slightly above the road surface when the vehicle is stopped and during normal running. In addition, the vehicle is braked by deforming the tread when the vehicle is braked so that the claw bites into the road surface.

According to a second aspect of the present invention, there is provided a tire with anti-slip pawls provided with a pair of anti-slip pawls disposed at a tip of a tread located between two tread grooves, wherein the pawls include: An elongate main body portion formed to be slightly curved downward, a claw portion provided at one end of the main body portion, and a claw support portion provided at the other end of the main body portion. A preventing claw is embedded in the tread at the other end of the main body portion, fixed to the tread by a claw support portion, and the one end of the tread extends through a through hole of the tread facing the tread. The tip of the claw portion is located slightly above the road surface when the vehicle is stopped and the vehicle is traveling normally, and the vehicle is controlled by the tread deforming when the vehicle is braked and the claw portion bites into the road surface. It is characterized in that to.

According to a third aspect of the present invention, there is provided a tire with anti-slip pawls provided with anti-slip pawls mounted in a tread groove. A claw portion provided at the lower portion of the main body, and a road surface contact portion provided at a lower portion of the main body. Is located slightly above the road surface, and when the vehicle is braked, the tread is deformed and the road surface contact portion comes into contact with the road surface, whereby the claw is inclined and the claw portion cuts into the road surface to brake the vehicle. It is characterized by the following.

[0010]

Preferred embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a contact point between a road surface and a tire during braking of a vehicle, and FIG. 2 is a cross-sectional view illustrating a contact point between a road surface and a tire when the vehicle is stopped and during normal running. is there. 1 and 2, the arrow A indicates the traveling direction of the vehicle.

FIG. 3 to FIG. 5 show a tire with anti-slip pawls according to a first embodiment of the present invention. In this embodiment, the tire with the anti-slip claw is
A slip prevention claw tool 10 is provided at the tip of the tread located between the two tread grooves. The tip of the tread in which the anti-slip claw tool 10 is embedded is
As shown in FIG. 3, it is slightly inclined inward toward the tread grooves on both sides. In addition, "the tip of a tread" means the surface of the tread which contacts a road surface, and "inside" means the direction inside a tire.

The slip prevention claw tool 10 has a main body portion embedded at the tip of the tread, and a claw portion 10a extending obliquely downwardly away from both ends of the main body portion. The anti-slip claw 10 is made of a metal material such as steel, and preferably has a body portion and a claw portion 10a.
Are integrally formed. The tip of the claw portion 10a is sharply formed so that it can bite into a frozen road surface when the vehicle is braked, as will be described in detail later.

Since the tip of the tread in which the anti-slip claw 10 is embedded is slightly inclined inward toward the tread grooves on both sides, as shown in FIG. The ten claw portions 10a are exposed to the outside of the tread when the vehicle stops and when the vehicle travels normally. The anti-slip claw tool 10 includes a claw portion 1.
0a is embedded so as to be slightly above the road surface without contacting the road surface when the vehicle is stopped and when the vehicle is traveling normally.

FIG. 5 is a view showing a state in which a braking operation is performed in a vehicle equipped with a tire in which the anti-slip pawl 10 is embedded. When braking,
As shown in FIG. 1, the tread deforms,
As a result, one of the claw portions 10a of the anti-slip pawl 10 (that is, the side in the traveling direction of the vehicle) bites into the frozen road surface, and the vehicle can be braked without slipping.

FIGS. 6 to 9 show a tire with anti-slip pawls according to a second embodiment of the present invention. In this embodiment, the tire with the anti-slip claw is
A slip prevention claw tool 20 is provided in the tread groove. The anti-slip claw tool 20 is a road surface provided between a plate-shaped main body portion, a claw portion 20a extending obliquely downwardly away from both ends of the main body portion, and a claw portion 20a below the main body portion. It has a contact portion 20b and claw support portions 20c extending laterally from both side surfaces above the main body portion. The anti-slip claw 20 is shown in FIG.
As shown in (2), the tip of the claw portion 20a is formed above the lowermost portion of the road contact portion 20b.

The anti-slip claw 20 is made of a metal material such as steel, and preferably includes a main body portion, a claw portion 20a, a road contact portion 20b, and a claw support portion 20.
c is formed integrally. Further, the tip of the claw portion 20a is sharply formed so that it can bite into a frozen road surface when the vehicle is braked, as will be described in detail later. The lower surface of the road surface contact portion 20b has a downwardly convex smooth curved shape. Further, the claw support portion 20c is formed of a bar-like member having an elliptical cross section.

FIG. 7 is a view showing a state of attachment of the anti-slip claw tool 20, and is a cross-sectional view taken along a line 7-7 in FIG. As shown in FIG. 7, a recess having substantially the same size and shape as the claw support portion 20 c of the slip prevention claw 20 is formed in the tread groove to which the slip prevention claw 20 is attached. By fitting the tool support portion 20c into the recess, the slip prevention claw 20
Installed on tires.

The slip prevention claw 20 is mounted on the tire such that the lowermost portion of the road surface contact portion 20b is located slightly above the road surface when the vehicle is stopped and the vehicle is traveling normally.

FIG. 9 is a diagram showing a state in which a braking operation is performed in a vehicle equipped with a tire to which the anti-slip pawl 20 is mounted. When braking,
The tread is deformed and the road contact portion 20b comes into contact with the road surface, whereby one of the slip preventing claws 20 (that is, the side in the traveling direction of the vehicle) bites into the frozen road surface, and the vehicle does not slip. Can be braked. Since the cross section of the claw support portion 20c is formed in an elliptical shape, the claw support portion 20 does not rotate in the concave portion, and the braking operation of the slip prevention claw 20 is released. At this time, the vehicle returns to the normal traveling position shown in FIG.

FIGS. 10 to 12 show a tire with anti-slip pawls according to a third embodiment of the present invention. In this embodiment, the tire with the anti-slip claw includes the anti-slip claw 30 attached to the tip of the tread located between the two tread grooves.
As shown in FIG.
An outer wall portion formed by a pair of opposing first side walls and a pair of opposing second side walls, a claw portion 30a extending diagonally downward away from both ends of the outer wall portion;
And a claw support portion 30c extending between the side walls.
As shown in FIG. 10, the slip prevention claw tool 30 is embedded such that the tip of the claw portion 30a is located slightly above the road surface when the vehicle is stopped and when the vehicle travels normally.

The anti-slip claw 30 is made of a metal material such as steel, and preferably has an outer wall portion and a claw portion 30a integrally formed. In addition, nail part 3
The tip of Oa is sharply formed so that it can bite into a frozen road surface when the vehicle is braked, as will be described in detail later.

The anti-slip claw 30 is fixedly attached to the tread by inserting a claw support portion 30c into a hole provided in the tread.

FIG. 11 is a diagram showing a state in which a braking operation is performed in a vehicle equipped with a tire to which the anti-slip pawl 30 is mounted. At the time of braking, the tread is deformed, and one claw portion 30a of the anti-slip claw tool 30 (that is, the side in the traveling direction of the vehicle) bites into a frozen road surface, and the vehicle can be braked without slipping.

FIGS. 13 to 15 show a tire with anti-slip pawls according to a fourth embodiment of the present invention. In this embodiment, a tire with anti-slip pawls is a pair of anti-slip pawls 4 fixedly attached to the tip of a tread located between two tread grooves.
0 is provided. As shown, each anti-slip claw 40 has an elongated main body formed to be slightly curved downward, and a claw 4 provided at one end of the main body.
0a and a claw support portion 40 provided at the other end of the main body portion
b.

As shown in FIG. 13, each of the slip preventing pawls 40 has the other end of the main body portion embedded in the tread and is fixed to the tread by a pawl supporting portion 40b. Extends through the through hole of the tread facing the tread, and is arranged such that the tip of the claw portion 40a is located slightly above the road surface when the vehicle is stopped and during normal running.

The anti-slip pawl 40 is made of a metal material such as steel, and the tip of the pawl portion 40a is sharply formed so that it can bite into a frozen road surface when the vehicle is braked. .

FIG. 15 is a diagram showing a state in which a braking operation is performed in a vehicle equipped with a tire to which the anti-slip pawl 40 is mounted. At the time of braking, the tread to which the anti-slip pawl 40 is fixed is deformed, and the pawl portion 40a bites into a frozen road surface, so that the vehicle can be braked without slipping.

As shown in FIGS. 13 and 15, a comb-shaped groove may be provided on the tread to which the slip preventing claw 40 is fixed so that the tread is easily deformed.

FIGS. 16 to 18 show a tire with anti-slip pawls according to a fifth embodiment of the present invention. In this embodiment, the tire with the anti-slip claw includes the anti-slip claw 50 mounted in the tread groove. The anti-slip claw 50 has a shaft 52 fixed to the top of the tread groove so as to extend downward from the top of the tread groove, and a main body in the shape of an upwardly convex dish, By fitting the shaft 52 into a hole 50b provided in the center of the main body,
The main body is attached to the shaft 52. As shown in FIGS. 16 and 18, the main body portion is prevented from falling off by engaging the projection 52a provided on the shaft 52 with the concave portion of the hole 50b.

As shown in FIG. 16, the lower end of the shaft 52 is disposed so as to be slightly above the road surface when the vehicle is stopped and during normal running. On the other hand, a claw portion 50a is provided at a peripheral portion of the main body portion, and a tip of the claw portion 50a is sharply formed so as to be able to bite on a frozen road surface when the vehicle is braked. Nail part 50
The tip of “a” is arranged so as to be located slightly above the lower end of the shaft 52 for the reason described later.

The anti-slip claw 50 is made of a metal material such as steel. In the embodiment shown in FIGS. 16 to 18, the main body and the shaft are formed separately. However, the main body and the shaft may be formed integrally.

FIG. 18 is a view showing a state in which a braking operation is performed in a vehicle equipped with a tire to which the anti-slip pawl 50 is mounted. At the time of braking, the tread is deformed and the lower end of the shaft 52 comes into contact with the road surface.
a bites into a frozen road surface and can brake the vehicle without slipping.

The present invention is not limited to the above embodiments of the invention, and various modifications can be made within the scope of the invention described in the claims, which are also within the scope of the present invention. It goes without saying that it is included in.

[0034]

As is apparent from the above description, according to the present invention, a tire provided with a relatively simple structure of a slip preventing claw that comes into contact with the road surface during braking and does not contact the road surface during normal running. Is provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a contact point between a road surface and a tire during braking.

FIG. 2 is a cross-sectional view showing a contact point between a road surface and a tire when the vehicle is stopped and during normal traveling.

FIG. 3 shows a first example of the present invention when the vehicle is stopped and when the vehicle is traveling normally.
It is sectional drawing which showed the tire with the nail | claw for slip prevention which concerns on embodiment.

FIG. 4 is a perspective view showing a slip prevention claw attached to the tire with a slip prevention claw shown in FIG. 3;

FIG. 5 is a cross-sectional view illustrating the tire with a slip preventing claw of FIG. 3 during braking.

FIG. 6 shows a second embodiment of the present invention when the vehicle is stopped and when the vehicle is traveling normally.
It is sectional drawing which showed the tire with the nail | claw for slip prevention which concerns on embodiment.

FIG. 7 is a sectional view taken along lines 7-7 of FIG. 6;

FIG. 8 is a perspective view showing a slip prevention claw attached to the tire with a slip prevention claw of FIG. 6;

9 is a cross-sectional view illustrating the tire with the anti-slip claw of FIG. 6 during braking.

FIG. 10 is a cross-sectional view showing a tire with anti-slip pawls according to a third embodiment of the present invention at the time of stopping and during normal running.

11 is a perspective view showing a slip preventing claw attached to the tire with a slip preventing claw of FIG. 10;

FIG. 12 is a cross-sectional view showing the tire with the anti-slip claw of FIG. 10 during braking.

FIG. 13 is a cross-sectional view showing a tire with anti-slip pawls according to a fourth embodiment of the present invention at the time of stopping and during normal running.

FIG. 14 is a perspective view showing a slip prevention claw attached to the tire with a slip prevention claw of FIG. 13;

15 is a cross-sectional view showing the tire with the anti-slip claw of FIG. 13 during braking.

FIG. 16 is a cross-sectional view illustrating a tire with anti-slip pawls according to a fifth embodiment of the present invention at the time of stopping and during normal running.

17 is a perspective view showing a slip preventing claw attached to the tire with a slip preventing claw shown in FIG. 16;

FIG. 18 is a cross-sectional view showing the tire with the anti-slip claw of FIG. 16 during braking.

Claims (3)

[Claims] 1. A tire with anti-slip pawls, comprising: anti-slip pawls disposed at the tip of a tread located between two tread grooves, wherein the pawls are embedded in the tip of the tread. And a claw portion exposed to the outside of the tread so that the tip is located slightly above the road surface when the vehicle is stopped and when the vehicle is running normally, and the tread is deformed when the vehicle is braked. A tire that brakes the vehicle by causing the claw portion to bite into the road surface. 2. A tire with anti-slip pawls, comprising a pair of anti-slip pawls disposed at the tip of a tread located between two tread grooves, wherein said pawls are slightly downward. An elongated main body portion formed to be curved to a right angle, a claw portion provided at one end of the main body portion, and a claw support portion provided at the other end of the main body portion. A tool is embedded in the tread at the other end of the main body portion, fixed to the tread by a claw support portion, and the one end of the tread extends through a through hole of the tread facing the tread, It is arranged so that the tip of the claw portion is located slightly above the road surface when the vehicle is stopped and when the vehicle is running normally. When the vehicle is braked, the tread deforms and the claw portion cuts into the road surface to brake the vehicle. Tire characterized by. 3. A tire with anti-slip pawls, comprising: anti-slip pawls mounted in a tread groove, wherein the pawls are provided at both ends or at the periphery of the main body part. A claw portion and a road surface contact portion provided at a lower center portion of the main body. The claw portion is located slightly above the road surface contact portion when the vehicle is stopped and during normal traveling, and the road surface contact portion is located on the road surface. It is located slightly above, and when the vehicle is braked, the tread is deformed and the road surface contact portion comes into contact with the road surface, whereby the claw is inclined and the claw portion cuts into the road surface to brake the vehicle. Tire to do.