JPH1058924A - Tire with pin device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display sufficient gripping force without generating dust compared with a conventional tire. SOLUTION: A pin device (a) comprises a cylinder body 1, movable pin 2, which is fitted in the cylinder body 1 and elastic receiving seat 3, and the tip section 2' of the movable pin 2 of the pin device (a) is made of synthetic resin, which is softer than asphalt road face D1 and harder than frozen road face D2, and the pin device (a) is fitted into and secured to a securing hole (c), which is recessed in a tire tread face b1. In such constitution, gripping force can be obtained by projecting the tip section 2' of the movable pin from the tire tread face b1 and making the movable pin 2 bite into the frozen road face D2 without shaving the asphalt road face D1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire having a pin device protruding from a tire tread surface, and more particularly to a tire with a pin device capable of preventing asphalt dust from being generated.

[0002]

2. Description of the Related Art At present, the use of spiked tires is banned due to regulations on the prevention of dust generation, and the number of drivers shifting from spiked tires to studless tires is increasing even in cold regions. . However, although the conventional studless tires have improved braking performance due to repeated improvements, they have not been able to exert sufficient grip force on a frozen road surface, which has caused a slip accident.

[0003]

Conventionally, in view of the above circumstances, many spike devices have been invented in place of metal pins of spiked tires, but most of the devices exhibit a grip force while shaving a road surface with a pin device. Because
At present, the generation of dust cannot be avoided, and practically it has not been practically used.

An object of the present invention is to provide a conventional tire
An object of the present invention is to provide a function for exhibiting good grip characteristics without generating dust.

[0005]

In order to solve the above-mentioned problems, a tire with a pin device according to the present invention comprises a substantially cylindrical cylinder body having a tapered diameter and a shape formed inside the cylinder body. A pin device is constituted by a movable pin which is fitted inside in a matched state to protrude a distal end portion from an opening on a small diameter side of the cylinder body, and an elastic seat provided inside a base end side of the movable pin inside the cylinder body. The tip of the movable pin of the pin device is made of a synthetic resin material that is softer than the asphalt road surface and harder than the frozen road surface, and the elastic seat is made of a member that is elastically deformable in the axial direction of the cylinder body. The above-mentioned pin devices are fitted into the mounting holes formed in the tire tread surface at appropriate intervals by being fitted from the cylinder body large diameter side, and the movable pin tips of these pin devices are tired. Those formed by protruding from the head surface.

[0006] According to the tire with the pin device constructed as described above, the movable pin is fitted inside the cylinder body whose diameter changes in a tapered shape in a shape-matching manner, and the tip of the movable pin is attached to the cylinder body. It protrudes from the opening on the smaller diameter side. Further, an elastic seat is provided in a space on the base end portion side of the movable pin in the cylinder body. The pin device is fitted and mounted in a mounting hole recessed in the tire tread surface, and the tip of the movable pin protrudes from the tire tread surface.

[0007] The tip of the movable pin is made of a synthetic resin which is softer and harder than an asphalt road surface and a frozen road surface. Therefore, when the tire tread surface rotates on the asphalt road surface during running, the tip of the movable pin of each pin device collides with the road surface, but the tip of the movable pin is made of a synthetic resin softer than the asphalt road surface. With the configuration, the road surface is not shaved and dust is not generated.

When the tip of the movable pin collides with the road surface, the movable pin fitted into the cylinder body is pushed into the cylinder body while compressing the elastic seat. That is, the impact force applied to the movable pin is absorbed by the elastic deformation of the elastic seat, and at the same time, the wear of the movable pin is reduced. In addition, the above-mentioned asphalt road surface is used in a meaning including a concrete road surface.

On the other hand, when the tip of the movable pin collides with the frozen road surface during traveling, the tip of the movable pin which is harder than the frozen road surface cuts into the frozen layer on the surface of the road surface to obtain a grip force. At this time, the elastic seat is compressed via the movable pin, and the repulsive force acts to push the movable pin back to make the tip of the movable pin bite into the frozen road surface.

[0010] In the tire with the pin device described above, it is preferable that a retaining claw that protrudes into the inner surface of the mounting hole protrudes from the outer peripheral portion of the cylinder body. In this case, the pin device fitted into the mounting hole is
The retaining claws protruding from the outer peripheral surface of the cylinder body bite into the inner surface of the fitting hole, thereby preventing the cylinder body from falling out of the fitting hole.

In the tire with the pin device, a lid closing the opening may be attached to the large-diameter opening of the cylinder body. As described above, in the case where the lid is fitted to the large-diameter opening of the cylinder, the large-diameter opening of the cylinder is closed by the lid, so that each pin device is mounted in the mounting hole. When previously in the single body state, the movable pin and the elastic seat fitted inside the cylinder body can be prevented from dropping from the large-diameter side opening of the cylinder body.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a tire with a pin device embodying the present invention. This tire with a pin device is formed by recessing a mounting hole c in a tread surface b1 of a tire main body b formed of a studless tire, and fitting and mounting a pin device a in each of the mounting holes c. It is. Although FIG. 1 shows a state in which one pin device a is attached to the tread surface b1 of the tire body b, in actuality, the tread on the outer periphery of the tire body b is similar to a normal spy tire. A large number of pin devices a are scatteredly mounted along the surface b1.

FIGS. 3 and 4 show the pin device a. The pin device a includes a cylinder body 1 having an outer diameter changed in a tapered shape, a movable pin 2 fitted inside the cylinder body 1, and an elastic seat fitted inside the cylinder body 1 together with the movable pin 2. 3 and a lid 4 fitted into the large-diameter opening of the cylinder 1.

The cylinder body 1 is formed in a relatively thin cylindrical shape using a synthetic resin such as urethane or a metal. Further, the cylinder body 1 is configured such that the diameter thereof is changed in a linear taper shape from one end to the other end so that the outer diameter becomes a truncated cone. A latching piece 5 protrudes from the outer periphery of the cylinder body 1 on the large-diameter side. When the cylinder body 1 is fitted into the mounting hole c of the tire body b, the locking piece 5 becomes an inner surface of the mounting hole c. And prevents the cylinder body 1 from dropping out of the mounting hole c.

The movable pin 2 fitted inside the cylinder body 1 is formed using a synthetic resin having a predetermined hardness. In the movable pin 2, the hardness of the pin 2a and the hard ring 2b constituting the tip 2 'is softer than a pavement road such as a dry asphalt road or a concrete road, and harder than a frozen road covered by an ice layer. It is configured using a synthetic resin.

The movable pin 2 is formed using a synthetic resin, for example, urethane resin, which conforms to the above hardness range. The movable pin 2 is formed in a truncated conical shape so as to be fitted inside the cylinder body 1 in conformity with the shape, and a pin portion 2a is integrally formed on a shaft core portion of a small diameter side end surface thereof, and the movable pin 2 has a large diameter. A concave portion 2c is formed on the side end surface.

A cylindrical hard ring 2b is fitted and fixed to the outer periphery of the pin 2a. The hard ring 2b is for improving the wear resistance of the tip 2 ′ of the movable pin 2, and is made of a synthetic resin harder than the pin 2a, for example, a high heat resistant thermoplastic engineering plastic, a so-called PEEK material. It is composed. The movable pin 2 and the hard ring 2b may be made of any synthetic resin as long as the surface hardness is within the above range.

When the above-described movable pin 2 is fitted inside the cylinder body 1, the outer periphery of the movable pin 2 is fitted inside the cylinder body 1 in a shape conforming to the inner periphery thereof, and the tip 2 'of the movable pin 2 is provided. Project through the small-diameter opening of the cylinder body 1. That is, by fitting the movable pin 2 inside the frustoconical cylinder body 1 in a shape-matching state, the axes of the two pins 1 and 2 match, and the tip 2 ′ of the movable pin 2 is small in the cylinder body 1. It is configured so as to be accurately inserted into the side opening.

The elastic seat 3 mounted on the large diameter side of the movable pin 2 elastically supports the movable pin 2 from the center of the tire when the movable seat 2 is mounted inside the cylinder body 1. It is made of an elastic body made of a strong elastic resin, such as silicon rubber or rubber. The resilient seat 3 is formed in a substantially rivet shape, and is fitted inside the cylinder body 1 in such a manner that the distal end on the small diameter side comes into contact with the concave portion 2c on the end face on the large diameter side of the movable pin 2.

After the movable pin 2 and the elastic seat 3 are fitted inside the cylinder 1 as described above, the cylinder 1
The lid 4 is fitted into the large-diameter side opening of FIG. 4 (FIG. 4), and the movable pin 2 and the elastic receiving seat 3 are held from falling off from the inside of the cylinder body 1. As described above, the movable pin 2 and the elastic seat 3 housed inside the cylinder body 1 are pressed against the lid 4 from the large-diameter side of the cylinder body 1 so that they are tightly fitted inside the cylinder body 1 without any gap. It is stored and held so as not to cause displacement or rattling.

The lid 4 is made of a synthetic resin or a steel plate, and the locking pieces 4a are formed by folding back at both ends.
Is elastically spread and locked on the outer peripheral surface of the large-diameter side opening of the cylinder body 1, thereby closing the large-diameter side opening of the cylinder body 1. The lid 4 may have any shape as long as it can be attached and fixed to the large-diameter side opening of the cylinder body 1 and can close the opening.

The pin device a configured as described above is mounted by fitting into the mounting hole c which is recessed at a required interval along the tread surface b1 of the tire b. The mounting hole c is formed slightly smaller than the cylinder body 1, and the pin device a
Is forcibly pushed and spread the mounting hole c. In the pin device a fitted in the mounting hole c, the cylinder body 1 is housed in the mounting hole c, and the tip 2 ′ of the movable pin 2 projects from the tread surface b1 of the tire b (FIG. 1).

In the pin device a which is forcibly fitted into the mounting hole c, since the cylinder body 1 is formed in a truncated cone shape, the pressure caused by the contraction of the rubber material around the mounting hole c is inclined. It is received by the outer peripheral surface of the shape, and receives a force in a direction to prevent it from falling out of the mounting hole c. This force prevents the pin device a from dropping out of the mounting hole c in cooperation with the above-mentioned biting force of the latching piece 5 of the cylinder body 1.

As described above, by closing the large-diameter side opening of the cylinder body 1 with the lid body 4, each pin device a
When the work is inserted into the mounting hole c of the tire and the red surface b1, there is no fear that the movable pin 2 and the elastic seat 3 fall off from the inside of the cylinder body 1 so that the mounting work of the pin device a can be performed smoothly. Can be performed.

Next, the operation of the tire with the pin device a configured as described above when traveling on a dry road surface and a frozen road surface will be described. During running, when the tire with the pin device described above rotates and moves on the asphalt road surface,
The tip 2 'of the movable pin 2 of each pin device a projecting from the tire tread surface b1 sequentially collides with the asphalt road surface D1. At this time, the movable pin 2 collides with the road surface D1,
The inside of the cylinder body 1 is pushed toward the large-diameter side opening while compressing the elastic receiving seat 3 (FIG. 5).

At this time, the tip 2 'of the movable pin 2 collides against the asphalt road surface D1, but as described above, the tip 2' of the movable pin 2 is made of a synthetic resin softer than the asphalt road surface D1. Since it is configured, there is no need to worry about shaving the road surface D1 and generating dust.

As described above, when the distal end portion 2 ′ of the movable pin 2 collides with the asphalt road surface D 1, the movable pin 2 is pushed into the cylinder body 1 while compressing the elastic seat 3. At the same time, the impact force applied to the movable pin 2 can be absorbed by the elastic deformation of the elastic seat 3, and the wear of the tip 2 'of the movable pin 2 can be effectively prevented. Further, when the pin device a is released from the contact pressure with the asphalt road surface D1, the elastic seat 3 is quickly restored to the original shape, and accordingly, the distal end portion 2 'of the movable pin 2 is moved to the tire. It projects again from the tread surface b1.

On the other hand, when the tip end 2 'of the movable pin 2 collides with the frozen road surface D2 while traveling on the frozen road surface D2 using the tire with the pin device a described above,
The tip 2 ′ of the movable pin 2, which is harder than 2, cuts into the frozen layer on the road surface to obtain a sufficient grip force (FIG. 6). At this time, the resilient seat 3 in the cylinder body 1 is somewhat compressed via the movable pin 2, but the repulsive force pushes the movable pin 2 back so that the tip 2 ′ bites more into the frozen road surface D 2. Therefore, the grip force is further improved.

In the above-described embodiment, the elastic seat 3 for supporting the movable pin 2 is made of an elastic resin, but the elastic seat supports the movable pin 2 and the shaft of the cylinder 1. Any material other than synthetic resin may be used as long as it elastically expands and contracts in the core direction. For example, as shown in FIG. 7, a coil spring may be used as the elastic seat 3 '.

The cylinder body and the movable pin used in the present invention preferably have a circular outer peripheral shape as shown in the above embodiment, but the cylinder body and the movable pin have a rectangular or polygonal outer shape. It is also possible to carry out by using the ones described above.

[0031]

As described above, according to the present invention, the movable pin is fitted inside the cylinder body, and the tip of the movable pin can be freely protruded and retracted from the tire tread surface by utilizing the elastic deformation of the elastic seat. And the tip of the movable pin is made of synthetic resin that is softer than the asphalt surface and harder than the frozen road surface, so when traveling on the asphalt road surface, the tip of the movable pin of each pin device Even if the vehicle collides with the road surface, the movable pin is made of a synthetic resin softer than the asphalt road surface, so there is no need to worry about shaving the road surface with the movable pin, and the generation of dust can be prevented. Further, when the tip of each movable pin collides with the road surface as described above, the movable pin is pushed into the cylinder body while compressively deforming the elastic seat through the movable pin, so that the impact force applied when the movable pin is grounded is reduced. The wear can be effectively reduced and the wear of the movable pin can be reduced. On the other hand, when traveling on a frozen road surface, when the tip of each movable pin collides against the frozen road surface, the tip of the movable pin that is harder than the frozen road surface cuts into the frozen road surface to obtain a sufficient grip force. be able to. At this time, the resilient seat is compressed via the movable pin, but the repulsive force acts to push up the movable pin and cause the pin tip to bite into the frozen road surface, thereby further improving the grip force. be able to.

In the tire having the pin device according to the second aspect, in which the retaining claw is projected from the outer peripheral portion of the cylinder body, the retaining claw of the pin device to be fitted into the mounting hole is provided in the fitting hole. Since it is possible to forcibly prevent the pin device from digging into the inner surface and coming out of the fitting hole, it is possible to effectively prevent the pin device from dropping out of the mounting hole during traveling.

In the tire with the pin device according to the third aspect of the present invention, when the lid is mounted on the large-diameter side opening of the cylinder body, it is in a single state before each pin device is mounted in the mounting hole. At this time, the large-diameter side opening of the cylinder body is closed by the lid, so that the elastic seat and the movable pin can be prevented from falling off from the inside of the cylinder body. The work of fitting by fitting into the mounting hole can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a tire with a pin device according to an embodiment of the present invention with a part thereof omitted.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view of the pin device.

FIG. 4 is a perspective view of the pin device.

FIG. 5 is a longitudinal sectional view showing a pin device portion while traveling on an asphalt road surface.

FIG. 6 is a longitudinal sectional view showing a pin device portion while traveling on a frozen road surface.

FIG. 7 is a longitudinal sectional view partially showing a tire with a pin device in which an elastic seat is constituted by a coil spring.

[Description of Signs] a: Pin device b: Tire body b1: Tread surface c: Mounting hole 1: Cylinder body 2: Movable pin 3: Elastic seat 4 ..Lids

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Kojima CI Building 403, 3-4-10 Yokokawa, Sumida-ku, Tokyo ) Inventor Kudo ▲ Tsutomu ▼ 2-1-1 Shimana Hisai Kitchen House, Nagawa-cho, Sannohe-gun, Aomori Prefecture

Claims (3)

[Claims] 1. A cylindrical body having a diameter changed in a tapered shape, and is fitted inside the cylinder body in a shape conforming to the cylinder body, and a tip portion protrudes from a small-diameter side opening of the cylinder body. A pin device is constituted by a movable pin to be squeezed and an elastic seat provided inside the base end of the movable pin inside the cylinder body, and the distal end of the movable pin of the pin device is softer than an asphalt road surface and harder than a frozen road surface. Along with being constituted by a synthetic resin material, the elastic seat is constituted by a member which is elastically deformable in the axial direction of the cylinder body,
The above-mentioned pin device is fitted and mounted in a mounting hole formed in the tire tread surface at an appropriate interval from the cylinder body large diameter side, and a movable pin tip of the pin device is projected from the tire tread surface. Tire with device. 2. The tire with a pin device according to claim 1, wherein a retaining claw that bites into an inner surface of the mounting hole is projected from an outer peripheral portion of the cylinder body. 3. The tire with a pin device according to claim 2, wherein a lid closing the opening is attached to the large-diameter opening of the cylinder.