JPH066401B2 - Side rope retaining mechanism for non-metallic tire chains - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a retaining mechanism at both ends of a side rope of a non-metallic tire chain.

[Conventional technology]

Non-metallic tire chains, for example, hooks are attached along both inner and outer edges of a net-shaped tire chain body at appropriate intervals, and the inner hook has a side to which a connecting hook is fixed at one end. When the non-metallic tire chain is attached to the tire, the tire chain body is wrapped around the tread surface of the tire and provided on the connecting hook at one end of the side rope inside the tire chain body. A loop portion at the other end of the side rope is hooked and connected to a hooking portion that is provided, and a ring-shaped rubber band is hooked and hooked on the outer hook of the tire chain body.

The end portions of the side ropes of the non-metallic tire chain attached to the tires receive tension in the tire circumferential direction during normal running of the vehicle, so the loops of the side ropes will not come out of the connecting hooks. , When the vehicle suddenly starts or stops suddenly, the tension of the side ropes may momentarily loosen, and when such a situation occurs, the loop part of the side ropes comes off the connecting hook,
The stability of the mounted state of the tire chain body may be impaired, and the anti-slip performance may be impaired.

Therefore, in order to solve such a problem, a connecting hook provided with a side rope retaining mechanism has been developed. For example, Japanese Utility Model Laid-Open Publication No. 60-132908 and Japanese Utility Model Laid-Open No. 63-193.
Those described in Japanese Patent No. 906, Japanese Utility Model Publication No. 63-9007, etc. have been proposed.

The connecting hook disclosed in Japanese Utility Model Publication No. Sho 60-132908 has a width narrower than that of the side ropes between the opposite hooking portions formed by bending both ends of the metal rod inwardly. The elastic piece member in the form of a flat plate made of rubber or the like is integrally formed with the gap portion, and a concave portion for stabilizing the side rope is provided on the side of the elastic piece member. When the loop portions on both ends of the side rope are hooked to the hooking portions of the connecting hooks, the elastic piece member is bent and deformed to widen the gap. When the side rope is stopped, the elastic piece member returns to its original state by its elasticity, so even if the tension of the side rope is loosened while the vehicle is running, the loops on both ends of the side rope will slip out of the gap between the connecting hooks. You can't do it.

The connecting hook disclosed in Japanese Utility Model Laid-Open No. Sho 63-193906 is an improved version of the connecting hook disclosed in Japanese Utility Model Laid-Open No. Sho 63-132908. The fixation of one member is made strong. In addition, the elastic piece member is extended to the upper part of the substantially central portion of the latching part with the base side thick and the tip side thin to facilitate bending of the tip end of the elastic piece member when attaching / detaching the side rope. At the same time, even if the tension of the side rope is loosened and the elastic piece member receives a pressing force from the loop portion on one end side of the side rope, the side surface of the elastic piece member on the opposite side is opposed to the tip surface of the hooking portion. The elastic piece member is prevented from being deformed by abutting against, and the width of the gap portion between the elastic piece member and the hooking portion is prevented from expanding.

The connecting hook disclosed in Japanese Utility Model Laid-Open No. 63-9007 is provided with a fastening part for attaching one end of a side rope to one end side of a hook body made of steel wire, and the other end side of the hook body is folded back to the fastening part side. A stopper portion is formed, and a substantially U-shaped slip-off prevention piece made of a highly elastic steel wire is attached to the hook portion formed between the hooking portion and the fastening portion, and the snap-off piece is folded. In the state where the curved portion is pressed against the inside of the tip of the hook portion, both ends are axially attached to the attachment portion, and both axial attachment positions are eccentric in the full length direction of the hook body. When hooking the loop portion on the other end side of the side rope to the hooking portion of the connecting hook, push the disengagement stopper piece into the inside of the connecting hook to release the pressure contact state to the hooking portion. When the retaining piece is pushed into the inside of the connecting hook, the bending part is twisted in one direction and tries to return in the other direction due to the difference in the rotation angle of the shaft attachment part between one end side and the other end side of the retaining piece. When a force is generated and the force that pushes the disengagement stop piece is released, the bent part of the disengagement stop piece returns to the original position and rotates and is pressed against the inside of the end of the hooking part, closing the hooking part. There is.

[Problems to be Solved by the Invention]

As described above, in the side rope retaining mechanism used in the conventional non-metallic tire chains, an elastic piece member such as rubber or a retaining piece made of a highly elastic steel wire rod is attached to the connecting hook itself. It is easy to attach and detach the side rope to and from the connecting hook,
There is no particular problem in that it has a function that can reliably prevent the loop part of the side rope that is hooked off from coming off from the connecting hook, but an elastic piece member such as rubber is integrally formed on the connecting hook itself, or There is a drawback in that the manufacturing cost is unavoidable because a step of attaching a retaining piece made by processing a high-elasticity steel wire into a U-shape is required.

The present invention has been made to eliminate such drawbacks, and an object of the present invention is to provide a non-metallic tire chain in which a side rope retaining mechanism is provided in a tire chain body.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is a non-metallic tire chain body made of an elastic material such as rubber, a side rope attached to at least the tire inner circumference side of the tire chain body, and a side at one end. The rope has a fastening part with one end fastened, and the loop part of the side rope is hooked to the other end with the loop part at the other end of the side rope. In a non-metallic tire chain including a connecting hook provided with an opening / closing opening provided separately, a rope lock that is integrally molded from the same material as the tire chain body and projects from the tire chain body toward the opening side of the connecting hook. Section is provided. The clearance formed between the rope locking portion and the fastening portion and hooking portion of the connecting hook is set to be smaller than the diameter of the side rope.

The tire chain body is clamped from both the front and back sides by the attachment part provided on the connecting hook, and its tip end faces the side surface of the tire chain body. It is preferable to bring the side surfaces into contact.

[Action]

In a non-metallic tire chain provided with the side rope detachment prevention mechanism of the present invention, when the loop portion of the aid rope is hooked on the connecting hook, the rope hook protruding from the tire chain body and positioned in the opening of the connecting hook. The tip portion of the stopper is lifted and bent and deformed, and the rope locking portion is removed from the opening of the connecting hook and held in the open state. In this state, after the loop portion of the side rope is hooked on the connecting hook and the force for lifting the rope locking portion is released, the rope locking portion returns to its original position by its own elastic force.

The loops of the side ropes that are hooked on the connecting hooks can be locked even if the loops come in contact with one side of the rope locking part when the tension due to the tension in the tire circumferential direction becomes loose. Since the other side surface of the connecting hook is pressed by the mounting portion or the fastening portion provided on the connecting hook to prevent deformation or movement, the clearance formed between the connecting hook and the hooking portion has the initial size. Is retained.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a partially omitted embodiment of a non-metallic tire chain including a side rope detachment preventing mechanism of the present invention.

The tire chain body 10 is formed by covering an elongated core material (not shown) having a predetermined length and width in which reinforcing cords are braided in a net shape with an elastic material such as rubber or synthetic resin. Is. At one side edge in the length direction of the tire chain body 10 (side edge arranged on the outside of the tire), a hook 11 to which a rubber band (not shown) is hooked is attached at an appropriate interval, and one end is attached. A hook 12 for connecting the other end is attached to the part. Further, hooks 13 are attached to the other side edge (the side edge arranged inside the tire) of the tire chain body 10 in the longitudinal direction at appropriate intervals, and a hole portion (first portion) provided at one end is provided. A connecting hook 20 is attached to (see FIG. 2) 14. A side rope 30 is swaged to these hooks 13, a loop portion (see FIG. 8) 31 at one end of the side rope 30 is fixed to the connecting hook 20, and a loop portion at the other end of the side rope 30 is fixed. 32 is connected to the connecting hook 20.

In the above-mentioned non-metallic tire chain, as shown in FIGS. 2 and 3, the tire chain body 10 is connected to the connecting hook 20 from the end where the connecting hook 20 is attached.
The rope locking portion 15 projecting to the side is integrally formed.

The rope locking portion 15 is integrally formed at the time of molding the tire chain body 10 by using a partially modified molding die of the tire chain body 10, and the connecting hook 20 is formed on the back surface of the base end portion thereof. A semicircular groove 16 having a width and a depth which are substantially the same as the material diameter is formed so as to open in the longitudinal direction of the tire chain body 10.

The rope locking portion 15 of the tire chain body 10 and the connecting hook 20 attached to the tire chain body 10 are
The mutual geometrical dimensions are set so as to have the positional relationship shown in FIG. 4 and FIG.

The connecting hook 20 is made of a steel wire material having an appropriate diameter and is bent into a shape (original shape) shown by a solid line in FIGS. 6 and 7, and is attached to the tire chain body 10. 21, a fastening portion 22 to which a loop portion 31 at one end of the side rope 30 is fastened, and a hook portion 2 to which a loop portion 32 at the other end of the side rope 30 is fastened.
3 and an opening 24 that is opened between the fastening portion 22 and the hooking portion 23 and through which the loop portion 32 of the side rope 30 comes in and out. The mounting portion 21 has a front side portion whose front end portion is bent at a right angle and a back side portion which is bent from the front side portion to face each other with the same width as the front end portion, and the front side portion is expanded with respect to the back side portion. We are open. The fastening portion 22 is bent annularly to the left from the lower end of the back side portion of the mounting portion 21, and a portion in contact with the back surface of the back side portion of the mounting portion 21 extends to the right side orthogonal to the mounting portion 21. The hooking portion 23 is bent in a hook shape from the extension of the fastening portion 22 to the same side as the fastening portion 22, and faces the fastening portion 22 with an opening 24 from the tip thereof.

When attaching the connecting hook 20 to the tire chain body 10, the tip portion of the attachment portion 21 of the connecting hook 20 is inserted into the hole portion 14 of the tire chain body 10 from the back surface side to the front surface side, and At the position where the extended portion of the fastening portion 22 is fitted into the groove 16 of the rope locking portion 15 of the tire chain body 10, the attachment portion 2 of the connecting hook 20 is attached.
The tire chain body 1 by the front side portion and the back side portion of 1
Tighten 0 and attach from both the front and back. In this state, the attachment portion 21 of the connecting hook 20 has the shape shown by the broken line in FIG. 6, and the tip portion 21a thereof faces the side surface of the tire chain body 10.

Thereby, the rope locking portion 1 of the tire chain body 10
The side surface of the tip portion of 5 is opposed to the tip surface of the hooking portion 23 of the connecting hook 20 via a clearance 25, and the side surface of the rope locking portion 15 on the opposite side is a mounting portion of the connecting hook 20. It comes into contact with the distal end portion 21a of 21 and is restrained from being deformed or moved toward the fastening portion 22 (see FIG. 8). In this state, a clearance 2 formed between the side surface of the rope locking portion 15 and the tip surface of the hooking portion 23 of the connecting hook 20.
The width of 5 (opposing interval) is set to be smaller than the diameter of the side rope 30.

Regarding the shape of the rope locking portion 15 of the tire chain body 10, the rope locking portion 15 and the hooking portion 2 of the connecting hook 20 are used.
3 is smaller than the diameter of the side rope 30 and the loop portion 32 of the side rope 30
Any shape can be selected as long as it does not hinder the required movement of the side ropes 30 when it is hooked on the hooking portion 23 of the connecting hook 20. Further, the rope locking portion 15 may be in a shape in which the opening portion 24 is closed by coming into contact with the tip end portion of the hooking portion 23 of the connecting hook 20 and no clearance is formed.

The rope locking portion 15 of the tire chain body 10 may be formed of only an elastic material such as rubber, but a reinforcing cord may be embedded in the elastic material, or a metal spring such as a leaf spring may be used as necessary. By embedding, bending strength,
The spring strength can be increased.

The procedure for attaching the non-metallic tire chain having the above-described configuration to a tire is the same as the conventional procedure, except that the side rope 30
When the loop part 32 of the tire is hooked to the hooking part 23 of the connecting hook 20, the tip of the rope locking part 15 of the tire chain body 10 located inside the opening 24 of the connecting hook 20 is moved outward. Lifting (in the direction of the arrow in FIG. 5), the base end portion of the rope locking portion 15 is bent and deformed against its elasticity, and the rope locking portion 15 is opened from the opening 24 of the connecting hook 20.
Is removed to make it open. While maintaining this state, the side rope 3 is passed through the opening 24 of the connecting hook 20.
The loop portion 32 of 0 is hooked on the hook portion 23. When the force for lifting the rope locking portion 15 is released at the same time when the side rope 30 is stopped to be hooked, the rope locking portion 1
5 returns to its original position in the opening 24 of the connecting hook 20 due to the restoring force of its own elasticity.

When the vehicle suddenly starts or stops suddenly and the tension due to the tension in the tire circumferential direction is momentarily loosened, the side ropes 30 thus connected via the connecting hooks 20 are momentarily loosened. The loop portion 32 hooked to the hooking portion 23 of the
However, the loop portion 32 comes into contact with the side surface of the rope locking portion 15 to connect the rope locking portion 15 to the connecting hook 2.
Even if the rope is pressed toward the fastening portion 22 side of 0, since the side surface of the rope locking portion 15 on the fastening portion 22 side is in contact with the tip portion 21a of the attachment portion 21 of the connecting hook 20, the initial position is changed. Deformation and movement will be prevented. Therefore, the size of the clearance 25 set between the rope locking portion 15 and the hooking portion 23 of the connecting hook 20 does not increase, so that the loop portion 32 of the side rope 30 comes out of the connecting hook 20. Can be reliably prevented.

Side ropes 30 hooked on the connecting hooks 20
The operation for removing the loop portion 32 is also performed in a state in which the rope locking portion 15 is bent outward and deformed against its elasticity similarly to the operation for locking.

The non-metallic tire chain of the embodiment is of a type in which the side ropes are connected only to the inside of the tire, but the non-metallic tire of the type that connects the side ropes not only inside the tire but also outside the tire. As for the chain,
This invention can be applied.

9 to 12 show another embodiment of the side rope detachment preventing mechanism of the present invention.

In the connecting hook 20 of this embodiment, one end of a steel wire rod is bent in an annular shape to provide a fastening portion 22, and the other end is bent toward the fastening portion 22 side in a hook shape to hook a portion 23. Is provided with a hook 23
Has a tip end opposed to the fastening portion 22 with an opening 24 therebetween.

A loop portion 31 at one end of the side rope 30 is fixed to the fixing portion 22 of the connecting hook 20.

The connecting hooks 20 are arranged parallel to each other in an upright state at a position slightly apart from the side edge of the tire chain body 10. In this state, the loop portion 31 of the side rope 30 is attached to the tire chain body 10 via the hook 35. is there.

Connection hook 2 formed integrally with the tire chain body 10
The rope locking portion 15 positioned in the opening portion 24 of 0 has a thickness smaller than that of the tire chain body 10 and protrudes to a position beyond the attachment position of the connecting hook 20, and one side surface and the hooking portion 23 of the connecting hook 20. Gaps 25 and 26 are formed between the tip end surface of the joint hook 20 and the opposite side surface of the fastening portion 22 of the connecting hook 20, respectively. The total size of the (opposing intervals) is set to be smaller than the diameter of the side ropes 30.

When the loop portion (shown by a broken line in FIG. 9) 32 at the other end of the side rope 30 is hooked on the hooking portion 23 of the connecting hook 20, as shown in FIG. It is bent and deformed in one direction to open the opening portion 24 of the connecting hook 20, and after the loop portion 32 of the side rope 30 is hooked through the opening portion 24, the rope locking portion 15 is returned to its original position by elastic force. .

Even if the tensional state of the side rope 30 connected to the connecting hook 20 is loosened and the loop portion 32 of the side rope 30 hooked to the hooking portion 23 comes into contact with the rope hooking portion 15, the rope hooking portion 15 Deforms up to the position where it contacts the opposite surface of the fastening portion 22 of the connecting hook 20, but the deformation or movement after being pressed by the fastening portion 22 is prevented, so that the rope locking portion 15 and the connecting hook 20 are prevented. The clearance formed between the hooking portion 23 and the hooking portion 23 retains the initially set dimension, and the loop portion 32 of the side rope 30 does not come out of the connecting hook 20.

〔The invention's effect〕

As described above, the side rope detachment preventing mechanism of the present invention allows the rope locking portion integrally formed with the tire chain body to project to the opening side between the fastening portion and the latching portion of the connecting hook. , Even if the tension of the side rope connected to the connecting hook is loosened, the loop part of the side rope that is hooked to the hooking part does not come out from the gap between the rope and the lock part. There is. Therefore, according to the present invention, similar to the conventional connecting hook provided with this type of mechanism, the side rope can be easily attached / detached, and a highly safe disengagement prevention mechanism can be obtained. The rope locking part can be integrally molded by making a slight modification to a part of the molding die, and there is no need to attach a special member to the connecting hook itself or to process it. Since it can be simplified, the manufacturing cost becomes low.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a non-metallic tire chain provided with a side rope detachment preventing mechanism of the present invention with a part omitted, and FIG. 2 is a rope engaging member of the tire chain body of FIG. Partially enlarged view showing the stopper, FIG. 3 is a side view of FIG. 2, FIG. 4 is a plan view showing a state where the connecting hook is attached to the tire chain body, and FIG. 5 is a side view of FIG. FIG. 6 is a side view showing the original form of the connecting hook, FIG. 7 is a front view thereof, FIG. 8 is a perspective view showing a state immediately before connection of both end connecting portions of the side ropes, and FIG. 9 is a side view of the present invention. FIG. 10 is a plan view showing another embodiment of the rope detachment preventing mechanism, FIG. 10 is a side view of FIG. 9, FIG. 11 is a sectional view taken along the line AA of FIG. 9, and FIG. It is sectional drawing which shows a deformation | transformation state. In the figure, 10 is a tire chain body, 15 is a rope locking portion, 20 is a connecting hook, 21 is a mounting portion, 22 is a fastening portion,
Reference numeral 23 is a hooking portion, 24 is an opening portion, 25 is a clearance, 30 is a side rope, and 31 and 32 are side rope loop portions.

Claims (2)

[Claims] 1. A non-metallic tire chain body made of an elastic material such as rubber, a side rope attached to at least the tire inner circumference side of the tire chain body, and one end of the side rope fixed to one end portion. The other end of the side rope is hooked to the other end to form a hooking part, and an opening through which the loop part of the side rope can come and go is separated from the hooking part. In a non-metallic tire chain including a connecting hook provided as a rope locking portion projecting from the tire chain body to the opening side of the connecting hook, the rope locking portion is integrally formed of the same material as the tire chain body,
A side rope detachment preventing mechanism for a non-metallic tire chain, characterized in that a clearance formed between a rope locking portion and a fastening portion and a hanging portion of a connecting hook is smaller than a diameter of the side rope. 2. An attachment portion provided on the connecting hook holds the tire chain body from both the front and back sides, and its tip portion faces the side surface of the tire chain body, and one side surface of the rope locking portion of the tire chain body. The side rope detachment preventing mechanism for a non-metallic tire chain according to claim (1), wherein the contact portion is in contact with the tip portion of the attachment portion of the connecting hook.