JPH07276925A - Spike tire - Google Patents

Abstract

PURPOSE:To provide a spike tire capable of moving a spike top end protrusively and recessively from a tire ground contact surface to prevent dust from producing. CONSTITUTION:Internal pressure varying chambers 14 are provided distributively on the peripheral surface 10b of a tire main body 10 which forms the ground contact surface 10a of the tire main body 10. Also the internal pressure varying chambers 14 are opened to the ground contact surface 10a, and the opening is closed by a displacement member 16. Then the displacement member 16 is installed in a displaceable manner in the direction P apart from and the direction toward a rotating shaft T of the tire main body 10. Further a flow path 18 connected to the internal pressure varying chamber 14 is provided in the tire main body 10, and the air pressure in the internal pressure varying chamber 14 is controlled through the flow path 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spike tire.

[0002]

2. Description of the Related Art Conventionally, in order to safely drive an automobile on a snowy road, a method of preventing slippage by using a spike tire has been proposed. In this spike tire, a plurality of spikes are scattered and provided on the outer peripheral portion of the tire forming the ground contact surface.

[0003]

However, in the conventional spike tire, since the spike is always projected from the ground contact surface of the tire outer peripheral portion, when the spike and the road surface are in direct contact with each other, the road surface is liable to be spiked. It is scraped and emits dust. Therefore, in recent years, the use of spiked tires has been prohibited.

An object of the present invention is to provide a spike tire which can control the spike tip position in order to solve the above-mentioned conventional problems.

[0005]

In order to achieve this object, a spike tire according to the present invention comprises a tire main body, and a plurality of spikes scatteredly provided on the tire outer peripheral portion forming a ground contact surface of the tire main body. The internal pressure change chamber for position control provided in the tire outer peripheral portion for controlling the spike tip position and the direction close to the rotation surface of the tire body and the rotation axis of the tire body that closes the inner surface side of the internal pressure change chamber And a displaceable member which is displaceable in a direction approaching to, and a spike is provided on the displaceable member.

[0006]

According to this structure, the displacement member is displaced in the direction away from the rotation axis of the tire main body by increasing the internal pressure of the internal pressure change chamber. It is displaced in the direction away from. As a result, the spike tip is projected from the ground contact surface formed by the tire outer peripheral portion (projected to the road side from the ground contact surface), and thereby the spike tip is displaced to a position in contact with the snow surface or the frozen surface of the road. be able to. Therefore, when the vehicle travels on a road that is likely to slip, the internal pressure of the internal pressure change chamber may be maintained so that the spike tip position is maintained at a position protruding from the ground contact surface.

Further, by lowering the internal pressure of the internal pressure change chamber, the displacement member is displaced in the direction approaching the rotation axis of the tire body, and therefore the spike provided on the displacement member is also displaced in the direction approaching the rotation axis of the tire body. As a result, the tip of the spike can be retracted to a position where it does not project from the ground contact surface formed by the tire outer peripheral portion (retracted to the tire body rotation axis side from the ground contact surface), and can be displaced to a position where it does not contact the road surface of the road. it can. Therefore, when traveling on a road where there is no risk of slippage or a road where dust is likely to occur, the internal pressure of the internal pressure change chamber may be maintained so that the spike tip position does not protrude from the ground contact surface.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the drawings are merely schematic representations so that the invention can be understood, and therefore the invention is not limited to the illustrated examples.

FIG. 1 is a side view schematically showing the overall construction of an embodiment of the present invention. As will be described later, the internal pressure change chamber 1
4 by increasing the internal pressure so that the tip of the spike 12 is located on the grounding surface 10
It shows a state in which it is projected to the road surface side from a.

As shown in FIG. 1, the spike tire of this embodiment includes a tire main body 10 and a plurality of spikes 12 scatteredly provided on a tire outer peripheral portion 10b forming a ground contact surface 10a of the tire main body 10. Equipped with. Further, in this spike tire, the internal pressure change chamber 14 for position control provided in the tire outer peripheral portion 10b for controlling the tip position of the spike and the ground contact surface 10a side of the internal pressure change chamber 14 are closed, and the tire main body 10 A displaceable displacement member 16 in a direction P moving away from the rotation axis T and a direction Q approaching the rotation axis T of the tire body 10 is provided, and the displacement member 16 is provided with spikes 12.

Therefore, the spikes 12 are provided on the tire outer peripheral portion 10b via the displacement members 16, respectively. When the internal pressure of the internal pressure changing chamber 14 is adjusted, the displacement member 16 is displaced in the direction P or Q according to the internal pressure, and therefore the spike 12 also follows the displacement member 16 and is displaced in the direction P or Q.

FIG. 2 is a sectional view schematically showing the construction of the main part of this embodiment. As will be described later, the internal pressure of the internal pressure change chamber 14 is lowered so that the tip end of the spike 12 is located at a position closer to the rotary shaft than the ground surface 10a. The state where it is retracted to the T side is shown. Figure 2 (A)
Is an enlarged sectional view corresponding to a section taken along line IIA-IIA in FIG. 1 and FIG. 2B is a sectional view taken along line IIB-IIB in FIG. 2A.

As shown in FIGS. 2 (A) and 1, the tire body 10 of this embodiment is a hollow annular structure which serves as a tire body of a tubeless tire or a tube type tire. It has an annular hollow portion 10e having a sectional shape that opens to the rim R.

The tire body 10 has a tire outer peripheral portion 10b and tire side wall portions 10c and 10d.
0c and 10d are connected to one and the other side portions of the tire outer peripheral portion 10b in the direction along the rotation axis T, and the tire side wall portions 10c and 10d are extended from these connection points to the rotation axis T side. This forms a hollow annular structure. Beads 10g are formed along the openings 10f at the extended end portions of the tire side walls 10c and 10d, respectively.
And 10h are formed. Here, the opening 10f is an opening that is opened to the rim R of the annular hollow portion 10e. A groove 10i (see FIG. 2A) is provided on the ground contact surface 10a of the tire body 10 to increase the frictional force with the road surface.

The inner pressure changing chamber 14 is connected to the outer peripheral portion 10 of the tire.
It is provided scatteredly in b, and the internal pressure change chamber 14 and the spike 12 are arranged at corresponding positions. In order to independently control the internal pressures of the internal pressure change chamber 14 and the annular hollow portion 10e, the internal pressure change chamber 14 is provided independently without communicating with the annular hollow portion 10e. Therefore, the internal pressure change chamber 14 is set to the annular hollow portion 10
There is no opening for e. Further, the internal pressure change chamber 14 is opened to the ground contact surface 10a, and the displacement member 16 is coupled to the tire outer peripheral portion 10b so that the opening of the internal pressure change chamber 14 is closed by the displacement member 16. The spike 12 is coupled to the displacement member 16. When the displacement member 16 is displaced until the tip end position of the spike 12 is retracted to the rotation axis T side with respect to the ground contact surface 10a, the space as the internal pressure change chamber 14 is wide enough not to hinder this displacement or displacement. Is formed.

The displacement member 16 may be deformable so that it can be displaced, but here, the displacement member 16 having an elastic restoring force is used.

Here, the tip position of the spike 12 is the ground plane 1
The position of the displacing member 16 when the displacing member 16 is displaced until the displacing member 16 is displaced toward the rotation axis T side from 0a until the tip position of the spike 12 projects toward the road surface side from the ground contact surface 10a. When the position of the displacement member 16 when the displacement member 16 is displaced is expressed as a protruding position, when the internal pressure of the internal pressure change chamber 14 is reduced to a predetermined pressure, for example, a pressure equal to atmospheric pressure, the displacement member 16 By the elastic restoring force of the member 16 itself, the shape that is convex toward the rotation axis T is retained,
As a result, the displacement member 16 is located at the retracted position. When the internal pressure of the internal pressure change chamber 14 is increased to a predetermined pressure, for example, a pressure equal to the tire air pressure, the displacement member 16 is elastically deformed according to the magnitude of the internal pressure and displaced to the protruding position.

Further, the internal pressure adjusting fluid passage 18 is provided in the tire body 10 in communication with the internal pressure change chamber 14. The flow path 18 is provided for all the internal pressure change chambers 14 provided on the tire outer peripheral portion 10b.

As the fluid for adjusting the internal pressure, a fluid such as gas (for example, air) or liquid (for example, oil) can be used, and the flow path 18 is connected to the internal pressure changing chamber 14 in an airtight or liquidtight manner. In addition to the fluid, a slurry-like substance or any other suitable substance suitable for pressure transmission can be used as the fluid for adjusting the internal pressure. By filling the internal pressure change chamber 14 with the internal pressure adjusting fluid loaded with a positive pressure through the flow path 18, the internal pressure of the internal pressure change chamber 14 can be increased. Further, by extracting the internal pressure adjusting fluid from the internal pressure changing chamber 14 via the flow path 18, the internal pressure changing chamber 1
The internal pressure of 4 can be reduced. Any suitable various methods can be used as a method of controlling the internal pressure of the internal pressure change chamber 14 by applying a positive or negative pressure to the internal pressure change chamber 14 via the internal pressure adjusting fluid, and the method is not limited. .

The flow passage 18 may be formed integrally with or separately from the tire body 10. In the illustrated example, a pipe 18a formed integrally with the tire main body 10 inside the tire outer peripheral portion 10b and a tube 18b formed separately from the tire main body 10 are air-tightly or liquid-tightly connected to each other. The flow path 18 is configured by the tube 18b. The pipe line 18a communicates with the internal pressure change chamber 14. In this case, the internal pressure changing chamber 1 is used with the internal pressure adjusting fluid as air.
An example of a method for controlling the internal pressure of 4 will be described. For example, the tube 18b is arranged in the annular hollow portion 10e, one end of the tube 18b is connected to the pipe line 18a, and the valve 20 is provided at the other end. . And the tire body 10
Is attached to the rim R of the automobile wheel H, and the valve 20 is removably positioned and fixed to the wheel H together with the rim R.
When the position of the displacement member 16 is set to the protruding position, the internal pressure change chamber 14 is filled with compressed air through the valve 20 while the vehicle is stopped.
Increase the internal pressure of. When the position of the displacement member 16 is set to the retracted position, the valve 2 is stopped while the vehicle is stopped.
By operating 0 to release the compressed air in the internal pressure change chamber 14 to the atmosphere, the internal pressure of the internal pressure change chamber 14 is reduced.
In this way, the vehicle is stopped, and, for example, the driver gets out of the vehicle and adjusts the internal pressure of the internal pressure change chamber 14 via the valve 20. Here, the vehicle is stopped so that, for example, the driver gets out of the vehicle and adjusts the internal pressure of the internal pressure change chamber 14, but instead of the valve 20, some remote-controllable pressure adjusting mechanism is used for the automobile and / or the tire body 10. Alternatively, the internal pressure of the internal pressure change chamber 14 may be adjusted by remotely operating the pressure adjusting mechanism while the driver is inside the vehicle while the vehicle is running or stopped.

FIG. 3 is a cross-sectional view schematically showing the structure of the main part of this embodiment, and shows an enlarged view of the vicinity of the spike 12 in FIG. 2 (A). In FIG. 3A, the spike 12
In the state where the tip end position of the is retracted from the contact surface 10a to the rotation axis T side, in FIG.
2 shows a state in which the tip position of is projected to the road surface side with respect to the ground contact surface 10a.

As shown in FIG. 3A, the internal pressure change chamber 1
When the internal pressure of 4 is reduced to a predetermined pressure, for example, equal to the atmospheric pressure, the displacement member 16 returns to the convex shape on the rotation axis T side by the elastic restoring force, and thus is located at the retracted position.
Therefore, the spike tip position is set back from the ground contact surface 10a. At this time, if the internal pressure of the internal pressure change chamber 14 is set to a negative pressure, the displacement member 16 is positioned at the retracted position even if it does not have elasticity as long as the displacement member 16 is displaceable and deformable. be able to.

Further, as shown in FIG. 3B, when the internal pressure of the internal pressure change chamber 14 is increased to a predetermined pressure, the displacement member 16 is elastically deformed and displaced to the projecting position, so that the spike tip position is in contact. It projects beyond the ground 10a. At this time, if the internal pressure of the internal pressure change chamber 14 is set to a positive pressure, the displacement member 16 is displaced to the projecting position. Therefore, the displacement member 16 does not have elasticity as long as it is displaceable and deformable. Both good.

The present invention is not limited to the above-mentioned embodiments, and therefore, the shape, size, number of arranged components, arrangement position, constitution and other conditions of each constituent are within the scope of the gist of the present invention. Can be changed arbitrarily.

[0025]

As is apparent from the above description, according to the spike tire of the present invention, the spike tip position is projected or retracted from the ground contact surface of the tire body in accordance with the internal pressure of the internal pressure change chamber. Can be made. Therefore, when the vehicle travels on a road that is likely to slip, the spike tip position can be kept at a position projecting from the ground contact surface, so that slip can be prevented. Further, when traveling on a road where there is no risk of slippage, the spike tip position can be kept at a position that does not project from the ground contact surface, so that it is possible to prevent the spike from scraping the road and thus to prevent dust from being generated.

[Brief description of drawings]

FIG. 1 is a side view schematically showing the overall configuration of an embodiment of the present invention.

2 (A) and 2 (B) are cross-sectional views schematically showing a main part configuration of an embodiment of the present invention.

3 (A) and 3 (B) are cross-sectional views schematically showing a main part configuration of an embodiment of the present invention.

[Explanation of symbols]

 10: Tire main body 12: Spike 14: Internal pressure change chamber 16: Displacement member 18: Flow path of fluid for internal pressure adjustment

Claims (2)

[Claims] 1. A spiked tire comprising a tire main body and a plurality of spikes scatteredly provided on a tire outer peripheral portion constituting a ground contact surface of the tire main body, wherein the tire outer periphery is for controlling a spike tip position. The internal pressure change chamber for position control provided in the section and the ground contact surface side of the internal pressure change chamber are closed, and are displaceable in a direction away from the rotation axis of the tire body and a direction approaching the rotation axis of the tire body. A spike tire comprising a displacement member and a spike provided on the displacement member. 2. The spike tire according to claim 1, wherein the tire main body has an annular hollow portion having a cross-sectional shape that opens to the rim, and the internal pressure change chamber is independent from the annular hollow portion and does not communicate with the annular hollow portion. A spike tire, characterized in that a flow path for an internal pressure adjusting fluid is provided in the tire body in communication with the internal pressure change chamber.