JPH06106927A - Tightening tool for tire antislip device - Google Patents

Abstract

PURPOSE:To provide a tightening tool wherein release of action can be also facilitated by decreasing an influence of durable life of constitutional parts given to a work mechanism surely actuated over a long period. CONSTITUTION:In a tightening tool 10, a foldback part 23 in one end of a double loop-shaped band 20, constituted of a flexible belt 21 and a rubber cord 22, is linked around a cleat 36 rotatably supported by a supporter 37 to a buckle 30, to stop a foldback part 24 in the other end to a block 35. The belt 21 of an outside loop of the band 20 can be turned around in a direction A by tension of a diametric spread direction A, and the belt 21 of an inside loop is brought into press contact with a lock part 36a of the cleat 36 by tension of the diametric spread direction A and impeded from turning around in the direction A. Consequently, looseness of the belt 21 of the inside loop is absorbed by the rubber cord 22, to properly maintain tightening force. When the inside belt 21 is turned around in the direction A, an unlocking pin 38 is turned to hold the cleat 36 in an unlock position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener which is attached to a widthwise end portion of a non-slip body of a tire anti-slip device on the outer side of a tire.

[0002]

2. Description of the Related Art As a fastening tool for a tire anti-slip device of this type, a mechanism disclosed in, for example, Japanese Patent Laid-Open No. 63-227410 has been proposed. An example of this tightening tool is that the middle part of the flexible rope is inserted into and retracted from the through hole of the body that pivotally supports the cam cleat, and one end of this rope is connected to the body. The rubber band is formed in a loop shape by connecting both ends of the rope to both ends of the rope, and the cam cleat of the body is formed by a spring biased in one direction of the length of the rope. Is clamped between the inner wall of the through hole and the cam cleat is rotated in the direction opposite to the direction of the biasing force of the spring, whereby the clamped state of the rope is released.

[0003]

In the tightening tool of the tire anti-skid device described above, the rope is movably pulled only in one direction by the pulling force of the rubber band when the vehicle is running, and this is the opposite direction. Is prevented by the urging force of the spring acting on the cam cleat, the rope has a function of always maintaining a predetermined tension to reliably hold the tire anti-skid device on the outer circumference of the tire.

However, since the cam cleat of this tightening tool utilizes the biasing force of the spring, the operation of the cam cleat is affected by the durability life of the spring, and the operation is uncertain after long-term use. There is a problem that there is no. The present invention solves the above problems and provides a fastener for a tire anti-slip device that ensures reliable operation for a long period of time, with the operating mechanism being hardly affected by the durable life of parts. The purpose is to provide.

[0005]

In order to achieve the above object, the present invention provides a fastening tool which is attached to a tire by being fastened to a widthwise end portion of a non-slip body of a tire anti-slip device which is arranged outside the tire. 2. A band member formed by endlessly binding a flexible stretchable band portion to a flexible non-stretchable band portion is double-folded, and the stretchable band portion is included in an outer loop. Heavy loop-shaped band, and 2
A buckle for locking the folded-back portions at both ends of the heavy loop-shaped band, wherein the buckle has a folded-back portion at least at one end of the double loop-shaped band and is rotatably supported by the tension of the non-extensible band portion. A cleat supported by the cleat, and a band passage having a space around which the non-extensible band portion can circulate around the cleat in one rotation position. The cleat has at least an inner loop of two surfaces facing the band passage. A hexahedron in which a convex portion in which the center distance of the projection line with respect to the front surface of the cleat gradually increases in the outer peripheral direction of the non-stretch band portion is formed on the surface around which the non-stretch band portion of In the rotating position, a lock mechanism is provided between the convex portion and the band passage to press the non-extending band portion into pressure contact with the cleat so as to prevent the inner circumference of the cleat. Projecting from the front side of the locking position the cleat with certain configured to have a lock release pin to rotate in the opposite position.

[0006]

When the non-extending band portion of the inner loop of the double loop-shaped band is wound around the cleat in the direction of expanding the diameter, the fastener of the present invention rotates the lock releasing pin to unlock the cleat. Orbit with it held at. On the anti-slip body of the tire anti-slip device attached to the tire,
When the fastener of the present invention is attached, the inner loop of the double loop-shaped band is expanded in the radial direction so that the inner loop has a diameter sufficient to hang on the hook fixed in the width direction of the main body. After adjusting the loop diameter by orbiting the non-extendable band around the cleat, first fix the non-extendable band of the inner loop on the hooks that are fastened to the widthwise end of the body. And pull the non-stretch band part of the outer loop in the direction of reducing the inner loop diameter,
Then, the non-stretch band portion and the stretch band portion of the outer loop are similarly hooked.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a tire antiskid device mounted on a tire using the fastener of the present invention. The tire anti-slip device 40 of the figure comprises a so-called net type non-metal anti-slip body 41 and its accessories, and the anti-slip body 41 is made of rubber on a core material such as a tire cord.
A mesh portion 42 which is covered with a synthetic resin or the like and is formed into a mesh structure which is continuous in the longitudinal direction (tire circumferential direction), and joint portions 43 and 4 which are formed linearly in the width direction of both longitudinal ends of the mesh portion 42.
4 and. Bending portions 45 extending outward in the width direction at regular intervals in the longitudinal direction are formed at the widthwise ends of the non-slip body 41, and metal hooks 46 are fastened to each of the bending portions 45 by caulking. I am doing it. Non-slip body 4
A hook is similarly fixed to the bent portion of the widthwise end portion of the tire 1 which is not shown in the drawing, and a non-extendable side rope having loop portions at both ends is crimped. The loop part at one end of the side rope is a non-slip body 41
Is attached to the bent portion of the joint portion of the side via a connecting tool (not shown), and the connecting tool is attached to the loop portion at the other end of the side rope.

The bent portions of the joint portions 43 and 44 arranged on the outer side of the tire of the anti-slip body 41 are joined together by the latches 39 provided on the buckle 30 of the fastener 10 of the present invention. The double loop-shaped band 20 of the fastener 10 is hooked on the hook 46 of each bent portion other than the joint portions 43 and 44. FIG. 2 is an overall view of the fastener 10.

The double looped band 20 of the fastener 10 is
At both ends in the length direction of the non-stretchable band portion 21 having flexibility,
A band member obtained by binding endless band members 22 having flexibility is double-folded so that the non-extension band parts 21 are located on both ends, and the non-extension band part of the folded band member is folded. Only the part 21 constitutes an inner loop, and the extension band part 22 is formed in a double loop shape by abutting the folded-back parts 23 and 24 at both ends so as to be included in a part of the outer loop. As the material of the non-stretch band portion 21, it is preferable to use, for example, a braid that is formed by knitting a yarn of polyester fiber into a belt shape, and the material of the stretch band portion 22 is to use a rubber strap.

As shown in FIGS. 3 and 4, the buckle 30 for locking the folded-back portions 23, 24 at both ends of the double loop band 20 is an elongated rectangular parallelepiped body made of synthetic resin such as nylon as shown in FIGS. 30a and the bottom lid 30c are connected by a screw (not shown). The main body 30a of the buckle 30 has a double looped band 2 on one side in the width direction.
A chamber 31a for accommodating the folded-back portions 23 and 24 of 0 and a cleat 36 described later is formed, and a groove 31b for attaching the hook 39 is formed on the other side in the width direction. Figure 4
(A) is a rear view showing a state in which the folded portions 23, 24 of the double loop band 20 and the cleito 36 are housed in the main body 30a of the buckle 30 with the bottom lid 30c removed, and the cleat 36 of the buckle 30. On one end side in the longitudinal direction, a lock release pin 38, which is rotatably supported by a shaft 37 inserted through a front wall 30b and a bottom lid 30c of the main body 30a and is provided on the front side of the cleat 36, is attached to the main body 30a. Of the front wall 30b is projected to the outside from the arcuate hole 32.

The folded portion 23 at one end of the double loop band 20 bypasses the support 34 projecting from the opening on one side in the longitudinal direction of the buckle 30 so as to circulate around the cleat 36 so as to be able to circulate. The folded-back portion 24 at the other end of the band 20 is non-rotatably attached to a block 35 provided in the chamber 31a through an opening on the other side in the longitudinal direction of the buckle 30.

The cleat 36 has front and back surfaces having parallel smooth surfaces, smooth side surfaces opposed to each other with an inclination of the same angle with respect to one axis of an orthogonal axis centered on the front and back surfaces, and other axes. Curved surface 36a facing each other with a predetermined curvature
It is a symmetric hexahedron with and. Convex curved surface 3 of cleat 36
6a is the surface (front surface) of the cleat 36 as shown in FIG.
The center of the projection line with respect to is formed symmetrically with respect to the center of the cleat 36 with respect to the center of the cleat 36 by forming a surface represented by a curve that increases from Rmin to Rmax from one diagonal portion P to the other diagonal portion S The curvature is made smaller toward the outer peripheral direction of the portion 21 (described later).

The curve shown by the broken line in the figure is a circle whose radius is the minimum center distance Rmin at one diagonal portion P, with the center of the cleat 36 being the center. The convex curved surface 36a may be replaced with a convex portion formed of a polygonal surface, a tooth surface, or the like having a base line whose center distance increases in the same manner. A hook 39 having a pair of hooks 39a is attached to the groove 31b of the main body 30a of the buckle 30.

In the tightening tool 10 having the above structure, when the non-extending band portion 21a of the inner loop of the double loop band 20 wound around the cleat 36 is pulled in the band expanding direction A, the cleat 36 is pulled by this force. With the shaft 37 as a fulcrum, FIG.
A gap having a minimum width W ₁ is formed between the convex curved surface 36a of the cleat 36 and the wall surface of the band passage 33 facing the convex curved surface 36a of the cleat 36 by rotating to the lock position shown in FIG. When the non-stretch band 21b of the outer loop 20 of FIG.
Rotate to the unlocked position shown in (c) to move the cleat 36
Of the band passage 33 and the convex curved surface 36 of the cleat 36 so that a gap having the maximum width W ₂ is formed between the convex curved surface 36A of the cleat 36 and the wall surface of the band passage 33 opposed thereto.
The relationship between the center distance of a, the rotation angle of the cleat 36, and the thickness of the non-stretch band portion 21 is adjusted.

Therefore, the non-stretchable band portions 21a and 21b of the inner and outer loops, when the cleat 36 is rotated to the lock position, act as a locking mechanism that is pressed against the wall surface of the band passage 33 by the cleat 36. Cleat 36
Although the inner circumference of the cleat 36 is blocked, when the cleat 36 rotates to the unlocked position, the width of the band passage 33 increases, so that the cleat 36 can be fitted inside.

Regarding the maximum center distance Rmax of the convex curved surface 36a of the cleat 36, the gap of the minimum width W ₁ formed in the band passage 33 is less than 1/2 of the thickness of the non-extending band portion 21, preferably zero. And the cutting center distance R
Regarding min, the maximum width W ₂ formed in the band passage 33
It is necessary to set the gap to be at least about 1 mm larger than the thickness of the non-stretch band portion 21.

The displacement of the center distance of the convex curved surface 36a of the cleat 36 from Rmin to Rmax is preferably set so as to be obtained by rotating the cleat 36 by about 110 °. If the rotation angle of the cleat 36 is too small, the center distance of the convex curved surface 36a corresponding to the rotation angle changes abruptly, so that the probability of slippage increases when the non-stretch band portion 21 is locked. Regarding the rotation angle of the cleat 36, the shape and size of the convex curved surface 36a should be set so that the angle θ between the lock position R and the unlock position Q in FIG. 5 is 50 to 60 °.

When the tire anti-skid device 40 is mounted on the tire 50 using the above-described fastener 10, the non-extending band portion 21a of the inner loop of the folded portion 23 at one end of the double loop band 20 is cleated in advance. It facilitates a fastener 10 that is circulated around 36 and adjusted so that the inner loop diameter is larger than the outer loop diameter. In this case, in order to pull the non-stretch band portion 21a of the inner loop in the radial direction, the lock release pin protruding from the arcuate hole 32 of the buckle 30 is rotated in the arrow direction B shown in FIG. Hold 36 in the unlocked position.

Anti-slip body 4 of the tire anti-slip device 40
1 on the outer periphery of the tire 50, and the hook 46 of the non-slip body 41 arranged on the outer side of the tire 50 is fitted with 2 of the fastener 10.
Non-extending band portion 2 of the inner loop of the heavy loop-shaped band 20
1a is hooked, the non-extendable band portion 21b of the outer loop is pulled in the direction of decreasing the inner loop diameter, and the tire anti-slip device 40 is temporarily hooked to the tire 50. Then tire 5
When 0 is rotated about 1/4 of a turn, the fastener 10 is removed, and the fastener 10 is inserted into the locking holes of the bent portions of the joint portions 43 and 44 of the non-slip body 41 that are arranged adjacent to the outside of the tire 50. Each hook portion 39 of the hook 39 of the buckle 30
The joint parts 43 and 44 are joined by hooking a.

Here, once again, the inner loop diameter of the double loop-shaped band 20 of the tightening tool 10 is adjusted to be larger than the outer loop diameter, and the non-slip body 41 hooks 46 annularly arranged outside the tire 50. After the non-stretching band portion 21a of the inner loop of the double-loop-shaped band 20 of the fastener 10 is hooked on the non-stretching band portion 21b of the outer loop, the non-stretching band portion 21b of the outer loop is pulled in the direction of reducing the inner loop diameter to unstretch the outer loop. The band part 21b and the extension band part 22 are hooked.

As a result, a predetermined tightening force by the non-stretching band portion 21 of the double loop band 20 is applied to the anti-slip body 41 mounted on the tire 50. When the non-extending band portion 21a of the inner loop of the double loop band 20 of the fastener 10 attached to the tire anti-skid device 40 receives a force in the radial expansion direction A while the vehicle is traveling, the cleat. 36 rotates to the lock position, and the convex curved surface 36a presses the non-extending band portion 21 against the wall surface of the band passage 33, so that the non-extending band portion 21 is attached to the cleat 3.
The inner circumference around 6 is blocked. Therefore, the inner loop maintains the tightening force applied to the anti-slip body 41 without expanding its diameter.

When the diameter of the inner loop of the double loop band 20 of the tightening tool 10 attached to the tire anti-slip device 40 is excessively large and loose, the non-stretch band portion 21b of the outer loop is fixed. A force in the radial expansion direction A due to the tensile force of the extension band portion 22 acts to rotate the cleat 36 to the unlocked position, and the non-extension band portion 21 surrounds the cleat 36 to increase the diameter of the outer loop. However, the diameter of the inner loop is relatively reduced. As a result, the non-stretching band portion 21a of the inner loop applies a predetermined tightening force to the anti-slip body 41.

Therefore, even when a situation occurs in which the tightening force of the tightening tool 10 applied to the anti-slip body 41 is loosened while the vehicle is running, the outside of the double-loop-shaped band 20. Since the extension band portion 22 of the loop absorbs the looseness and adjusts the tightening force of the non-extension band portion 21 to have an appropriate strength, it is not necessary to perform additional tightening, and the tightening tool for the tire antiskid device 40 is not required. After installing 10, there is no need to inspect the quality of the tightened state, the presence or absence of loosening, and the like.

Even if the vehicle runs at high speed, the fastener 1
Since the necessary tightening force is obtained by the non-stretching band portion 21 of the double loop-shaped band 20 of 0, the tire slip prevention device 4
The anti-slip body 41 of 0 completely prevents the anti-skid body 41 from spreading outward in the radial direction of the tire 50 due to the centrifugal force generated as the tire 50 rotates at high speed, and does not impair the performance of the tire anti-skid device 40.

Since the cleat 36 of the tightening tool 10 is rotatably supported about the shaft 37 as a fulcrum, when the cleat 36 is rotated to the locked and unlocked positions by the tension of the double loop band 20. Responsive operation is guaranteed. Further, in this embodiment, since the non-stretching band portion 21 of the double loop band 20 bypasses the support 34 and is wound around the cleat 36, the non-stretching band portion 21 around the cleat 36 smoothly goes around. In addition to the above, there is an advantage that the operation of the lock mechanism by the cleat 36 becomes more reliable, but the support 34 may be omitted.

When the fastener 10 attached to the tire anti-slip device 40 is to be removed, the non-expanding band portion 21b of the outer loop of the double loop band 20 hooked on the hook 46 of the anti-slip body 41 is extended. After the band portion 22 and the band portion 22 are hooked and removed from the hook 46 against the restoring force of the extension band portion 22, the lock release pin 38 holds the cleat 36 rotated to the lock release position, and the non-extension band portion of the inner loop is held. By enlarging the diameter of 21a around the cleat 36 and expanding the diameter, the non-extending band portion 21a of the inner loop can be easily hung from the hook 46.

When the fastener 10 is attached to the antiskid body 41 of the tire antiskid device 40 mounted on the tire 50, the extension band portion 22 of the outer loop of the double loop band 20 has a long length, The workability is improved as the extension rate when hooked on the hook 46 of the anti-slip body 41 arranged in an annular shape on the outer side of the outer loop is increased. The diameter of the inner loop cannot be made sufficiently large at the time of attachment, and there is a possibility that it cannot be hooked on the hook 46 of the anti-slip body 41. If the extension rate of the extension band portion 22 of the outer loop is too low, the tightening force for always maintaining the predetermined tension may be unpredictable in the non-extension band portion 21a of the inner loop. On the other hand, if the extension rate of the extension band portion 22 of the outer loop is too high, the workability of attaching and detaching is deteriorated.

Therefore, in the tightening tool 10 of the present invention, the extension rate of the extension band portion 22 of the outer loop when mounted is 15 to 60%, preferably 25 to 50%, and the extension band portion with respect to the circumference of the outer loop. The ratio of the length of 22 is 50 to
It is good to set it to 85%, preferably 60 to 75%.
In the above-described embodiment, the convex curved surface 36a of the cleat 36 is symmetrical
Although the case where the convex curved surface 36a is formed on both surfaces has been described, the convex curved surface 36a may be formed only on the surface on which the non-extendable band portion 21a of the inner loop is wound among the two symmetrical surfaces of the cleat 36.

In addition, the latch 39 attached to the buckle 30 of the above-described embodiment is the joint portion 43, 4 of the non-slip body 41.
It is also possible to lock it on any one of the bending portions on the outer side of the tire of No. 4 above. In the case of using the buckle 30 in which the latch 39 is omitted, the joint portions 43 and 44 on the tire front side of the anti-slip body 41 mounted on the tire 50 are joined by the latch, and then the fastener 10 is attached. Buckle 30
In this state, the double loop-shaped band 20 is hooked while the hooks 46 of the anti-slip body 41 are arranged at arbitrary positions.

The fastening tool 10 of the present invention has the folded-back portion 2 at one end of the double loop-shaped band 20 as in the above embodiment.
Not only when only 3 is hung around the cleat 36 of the buckle 30, but the cleat is pivotally supported at both ends in the longitudinal direction of the buckle 30, and the folded portions 23, 24 at both ends of the double loop band 20 are provided in the pair of cleat. It is also possible to have a structure in which it can be lapped around.

[0031]

As described above, according to the fastener of the present invention, the band member including the flexible non-extending band portion and the stretching band portion is folded so that the stretching band portion is included in the outer loop. To form a double loop-shaped band, and at least one end of the double loop-shaped band is folded back,
The cleat, which is placed around the cleat rotatably supported in the buckle and is locked by the tension of the non-stretch band portion of the double loop band, makes the non-stretch band portion the wall surface of the buckle band passage. Since a lock mechanism for press contact is provided, when the fastener is attached to the tire antiskid device, the non-extendable band portion of the outer loop of the double loop-shaped band circulates around the cleat only in the radial expansion direction, Circulation in the opposite direction is prevented, the stretch band portion absorbs the looseness of the double loop-shaped band, and the non-stretch band portion gives a predetermined tightening force to the anti-slip body of the tire anti-skid device to prevent the tire radius. The function of preventing the outward spread of the direction is surely fulfilled.

Further, since the fastener of the present invention is provided with the lock release pin for rotating the cleat at the lock position to hold the cleat at the lock release position, the lock mechanism for the non-stretch band portion of the double loop band is provided. Can be released easily and surely, and the operation of removing the fastener attached to the anti-slip body can be performed easily and quickly. Moreover,
According to the present invention, unlike a component that constitutes a fastening tool, which may be damaged or has a limited service life, it is composed of only a highly durable component that does not have a moving part itself. Since a simple lock mechanism and lock release mechanism are adopted, the labor of maintenance and inspection and parts replacement can be saved, and a fastener exhibiting highly reliable functions over a long period of time can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which the fastener of the present invention is attached to a tire slip prevention device.

FIG. 2 is a front view showing an embodiment of the fastening tool of the present invention.

FIG. 3 is a perspective view showing a buckle body of the fastener of the present invention.

4 is a state in which the buckle body of FIG. 3 and the folded portion of the double loop band are locked (a), a lock position (b) and an unlock position (c) of a cleat pivotally supported by the buckle body.
FIG. 4B is a rear view showing the same, FIG. 6B is a left side view thereof, and FIG.

FIG. 5 is an enlarged front view of the cleat.

FIG. 6 is a front view showing the locked state of the buckle and the double loop-shaped band of FIG. 3 (a) in the lock position (a) and the unlock position (b) of the cleat.

[Explanation of Codes] 10 Fasteners 20 Double loop band 21 Non-extensible band part 21a Inner loop non-extended band part 21b Outer loop non-extended band part 22 Expanded band part 23, 24 Folded part 30 Buckle 33 Band passage 36 Cleat 36a Convex curved surface (convex portion) 38 Lock release pin 40 Tire slip prevention device 41 Anti-slip body 50 Tire

Claims (1)

[Claims] 1. A tightening tool which is attached to a tire by being hung on a widthwise end of a non-slip body of a tire anti-skid device, the end being provided outside the tire. A double loop-shaped band formed by folding the band member formed by endlessly binding the stretched band portion having the double looped loop member and including the stretched band portion in the outer loop; A buckle for locking the folded-back portion, wherein the buckle has a cleat in which the folded-back portion of at least one end of the double loop-shaped band is wound, and which is rotatably supported by the tension of the non-extending band portion; A band passage in which a non-extending band portion is formed with a space capable of orbiting around the cleat in the rotation position of the cleat, the cleat being at least an inner loop of two surfaces facing the band passage. A hexahedron in which a convex portion in which the center distance of the projection line with respect to the front surface of the cleat gradually increases in the outer peripheral direction of the non-stretch band portion is formed on the surface around which the non-stretch band portion of In the rotating position, a lock mechanism is provided between the convex portion and the band passage to press the non-extending band portion to prevent the inner circumference around the cleat, and the cleat is projected on the front side of the cleat to lock the cleat. A fastener for a tire anti-skid device, which has a lock release pin that rotates in a position opposite to the position.