JPH0423048Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a fastening tool that easily reduces slack in an automobile tire chain attached to a tire.

"Prior Art" Conventionally, after a ladder-like tire chain 21 is attached to the outer periphery of a tire 20 (Fig. 5), side chains 22 located on both sides of the tire are tightened to reduce slack in the tire chain 21. However, if the adjustment link is attached to the end of the side chain 22 with a large amount of slack from the beginning, and the chain band is hooked onto this side chain 22 and tightened, the side chain 22 at the hooked portion
When the tire 20 is pulled toward the center of the tire 20, the side chain 22 becomes slack, as shown in FIG. 6, and the pulling force becomes ineffective.

Further, the fastener 31 in Utility Model Publication No. 12887-1987, which is an example of the conventional fastener shown in FIG.
A thin metal plate 32 is formed into a substantially triangular shape, and a mounting hole 33 is provided at the corner, and a first seat portion 35 at one end of a long hole 34 provided in a substantially arc shape in the longitudinal direction along the side of the fastening fitting. One side 36 on which the chain a slides is curved outward, and a second seat 37 is formed at the other end of the elongated hole 34 via a convex portion 38.

When the tightening fitting 31 is rotated in the direction of arrow X using this mounting hole 33 as a fulcrum, the chain a
The convex portion 38 slides along one curved side 36 of the
and engages with the second seat portion 37 to pull and pull chain a toward chain b. However, although it is not possible to easily move to the second seat 37 and one side 36, the other linear side 39 is directly connected to the first and second seats 35, 37, so the chain Since the part a can be removed from the first and second seats and moved along the other side 39, the chain may become slack after being pulled.

Furthermore, when rotating the fastening fitting 31 in the direction of the arrow X in Fig. 7, the operator must turn it with his bare hands because there is no place to hook a tool such as a spanner (not shown). The problem was that it was difficult to use and the workability was extremely poor.

Furthermore, tire chain 2 with a lot of slack
1 is attached to the tire 20, and even if the tire chain is attached to the tire without any slack, the slack will naturally come out as it adapts to the tire while the car is running. In this case, the effectiveness of the chain band 23 is small, and the tire chain 21 is limited by the rotation of the tire (5/sec).
The tires swelled outward due to the centrifugal force caused by the rotation (up to 10 revolutions), causing the tire chain that covered the tread surface of the tire to slam against the road surface, causing problems such as damage to the chain due to the impact. .

``Problems that the invention attempts to solve'' The present invention was made in view of these conventional problems, and its structure consists of three different lengths.
First and second recesses each having a depth of 1/2 or more of the outer diameter of the iron wire are provided at both ends of a short straight first side consisting of a side iron wire, and are continuous with the second recess. A second side that is slightly longer than the first side is curved outward through a first locking part that protrudes inward, and is continuous with the first side at an obtuse angle. A scalene triangle is formed by connecting the third recess and the third side, which is longer and straighter than the second side, via a second locking part protruding inward from the end of the first recess. The invention is characterized in that an engaging portion is provided on the surface of the intermediate portion of the third side to prevent chain movement and also serve as a spanner hook.

"Function" Since a plurality of fasteners according to the present application are attached to the side chain portion of the tire chain, simply by rotating the fasteners with a tool, the side chain is pulled and slack in the tire chain can be easily removed. I can do it.

"Example" An example of the present invention will be described based on the drawings.
1 is a tightening tool consisting of a scalene triangle made of iron wire, with 1/1 of the outer diameter of the iron wire at both ends of the short straight first side 2.
First and second recesses 3 and 4 having a depth of 2 or more are provided,
The first locking portion 5 is curved outwardly through a first locking portion 5 that is continuously provided at one end of the second recess 4 and protrudes inwardly.
A second side 6 longer than side 2 is formed.

A third recess 7 is provided at the end of the second side 6, and the third recess 7 and the second locking portion 8, which is provided so as to continuously protrude inward from the first recess 3, are connected in a straight line. and are connected by a third side 9 which is longer than the second side 6, and furthermore, the third side 9
An engaging portion 10 for preventing chain movement and serving as a spanner hook is fixed to the surface side at the middle portion of the iron wire, and is formed into a substantially rectangular shape with one side longer than the outer diameter of the iron wire.

To explain the operation of this embodiment, the tire 1
A plurality of cross chains 13 covering the tread surface of 2
A tire chain 15 is attached to a side chain 14 connecting both ends of the tire chain 15 with one or more fasteners 1 interposed therebetween.
When initially installing the side chain 14 in the extended state of the side chain 14 by hooking it into the first and third recesses 3 and 7 of the respective fasteners 1 and positioning it on the extension of the straight line I-I. Attach it to the tire 12 using T in Figure 4, run the car for a little while to let it get used to the tire and loosen the tire chain 15, and then stop the car.
By engaging the engagement portion 10 of one fastener 1 with a spanner (not shown) and rotating it in the direction of arrow Y in FIG. 2, one chain B of the side chain 14 is removed from the third recess 7. The state in which the distance M between the chains A and B is narrowed to the distance N (M>N) shown in FIG. It has the function of narrowing the distance between chains A and B in place of Figure 4 S).

It is desirable that a plurality of fasteners be attached to the side chain 14 so that the chain can be tensioned in multiple stages. Furthermore, when the tightening tool 1 is rotated to tension the chain, the third concave side is located toward the center of the tire 12, so the side surface of the tire will not be damaged, and the tightening tool can be rotated. When moving, the engaging portion 10 can be easily rotated by engaging a spanner (not shown). Furthermore, since this engaging portion 10 is located only on the front side of the fastener 1 and does not have any protrusions on the back side, the tire 1
No damage to 2.

``Effect of the invention'' Since the first and second recesses provided at both ends of the first side are connected to the third side and the second side through locking portions protruding inward, respectively, , the chain hooked to the two recesses cannot move to the third side and the second side unless it gets over the first and second locking parts,
The chain does not loosen easily.

Since a plurality of fasteners are attached to the side chains, the distance between the chains can be narrowed and slack can be easily removed by simply rotating the fasteners without replacing the chains.

Since the engaging part is provided in the middle part of the long linear third side, the chain will come off the first groove and the third
Even if the chain tries to slide on the side, it will be stopped by the engaging portion, and has the advantage that the chain will not loosen.

This has the advantage of eliminating the need for extra parts such as chain bands for tensioning the chain, and preventing an increase in the weight of the chain.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a plan view of the fastener, Fig. 2 is a front view of the same, Fig. 3 is a plan view of the chain in tension, and Fig. 4 is a diagram of the tire. Figures 5 to 7 show a conventional example, and Figure 5 is a front view with a chain band attached to a side chain attached to a tire, and Figure 6 shows a front view with a chain band attached to a tire. 7 is a front view of the chain band in a tightened state, and FIG. 7 is a plan view showing a conventional tightening fitting. 1... Fastener, 2... First side, 3... First recess, 4... Second recess, 5... First locking part, 6...
Second side, 7... Third recess, 8... Second locking part, 9
...Third side, 10...Engagement portion.

Claims (1)

[Scope of utility model registration request] It consists of three sides of iron wire with different lengths, and first and second recesses each having a depth of 1/2 or more of the outer diameter of the iron wire are provided at both ends of a short straight first side, and a second recess is provided. A second side that is slightly longer than the first side is continuous with the first side at an obtuse angle by being curved outward through a first locking part provided so as to protrude inwardly and continuing from the recess. A straight third recess that is longer than the second side is inserted through a third recess that is continuously provided on two sides, and a second locking part that is provided to protrude inward at the end of the first recess. This tightening tool for a tire chain is formed by connecting three sides to form a scalene triangle, and providing an engaging part for preventing movement of the chain and for a spanner hook, located on the surface of the middle part of the third side.