JPH0321289Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a tire chain used when automobiles run on snow, that is, a tire consisting of left and right side chains and a number of cross chains for connecting both side chains. This invention relates to a hook for attaching a chain to a tire using a band (rubber band or coil spring band).

[Conventional technology]

A conventional tire chain hook, as shown in FIG. 1, is composed of a main body part a, a side chain hook part b, and a ring-shaped part c for inserting a band.

[Problem that the invention attempts to solve]

As is well known, as a tire chain band, an endless type band and a non-endless type band having a locking function at both ends are used.

There is no problem when using the above-mentioned conventional tire chain hook having the ring-shaped part c for a non-endless band, but the endless band becomes unusable, and the user is forced to use a non-endless band. This is what I was looking for.

Also, in order to enable the use of both bands,
It may be possible to make the ring-shaped part c into a hook-shape, but if the ring-shaped part c is simply formed into a hook-shaped part from a rigid material such as metal, there will be a problem with the size of the opening that forms the hook-shaped part. remain. In other words, if the diameter of the band is larger than the diameter of the band, it will be easier to insert the band, but if the band does not have sufficient tension, the band will be pulled out from the opening if a shock is applied while driving, or if the vehicle is suddenly started or stopped. is likely to escape.

On the other hand, if the opening is made smaller than the diameter of the band, it becomes impossible to insert the band into the opening.

[Means for solving problems]

Therefore, this invention is based on a tire chain hook that is made of synthetic resin and has a side chain hook part at one end and a band hook part at the other end. The opening of the opening is smaller than the diameter of the band normally used, and a projecting plate is provided inside the opening so that it can be freely engaged with the band, and the projecting plate is formed so that it can be elastically restored. We adopted a method of providing reinforcing ribs at desired parts of the outer periphery.

[Effect]

It allows the band to be inserted into the opening narrower than the diameter of the band, and at the same time prevents the band from coming off due to the elastic restoring force of the projecting plate that forms the opening, and also allows for both types of bands, such as no-endless bands and endless bands. This enabled the use of

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 2 and 3.

Of these, FIG. 2 is a side view, and FIG. 3 is a front view.

1 is a main body plate part, 2 is a side chain hook part formed at one end of the main body plate part 1, and 3 is a main body plate part 1.
A hook-shaped portion for a band is formed at the other end.

The main body plate portion 1, the side chain hook portion 2, and the band hook portion 3 are heat resistant, impact resistant,
Synthetic resins with corrosion resistance, such as polycarbonate (polyamidc) [nylon (trade name) manufactured by DuPont, USA, etc., or polyester (polyester)]
It is integrally formed by mold means using materials such as the like.

Reference numeral 31 denotes a protruding plate portion formed at the upper part of the band hook-shaped portion 3, and the inside of this protruding plate portion 31 can be freely engaged with a band inserted into the opening m, which will be described later.

Reference character m is a mouth formed between the projecting plate part 31 and the main body plate part 1, and the opening degree of this mouth part m is normally formed to be smaller than the diameter of the band. In addition, the projecting plate part 31 is configured to be able to expand against elasticity, in other words, to be elastically restored when deformed, so that the projecting plate part 31 makes it easy to insert the band into the mouth part m, and during use. By locking the band to the projecting plate portion 31, the band is prevented from coming off from the outside.

Further, the width l of the projecting plate portion 31 is as shown in FIG.
Each tire chain hook is attached to the band during a sudden start or sudden stop by having a sufficient width l to ensure a sufficient contact area with the band inserted into the mouth m during use. The hook for the tire chain is always placed at the desired position of the band to prevent the tire chain from tilting with respect to the band due to impact and move inadvertently. To enable a hook to be locked with an average tension without being biased.

Note that 32 is a planar portion formed in a gentle arc shape or a straight line shape at a location where the outside portion of the wheel or the inside portion of the tire may come into contact. 33 is a concave portion formed in the axial direction to impart elastic restorability to the projecting plate portion 31, and 34 is a concave portion formed substantially in the center so as to intersect within the concave portion 33 as shown in FIG. This is a reinforcing rib. This reinforcing rib 34 is for preventing the projecting plate part 31 from being deformed and broken when the band is expanded to be inserted into the opening m of the band hook part 3. Reference numeral 35 denotes a band hook-shaped portion 3 provided at one end (lower end) of the main body plate portion 1.
This is a reinforcing rib formed at the lower part of the band, and prevents the band hook-shaped part 3 from breaking due to the tensile force of the band or the compressive force from the outside.

In the above configuration, an endless band or a non-endless band made of rubber or a coil spring is brought into contact with the mouth m and is pressed.

In this case, the projecting plate part 31 is bent outward by the diameter of the band by the press-fitting of the band, and returns to its original shape due to elasticity at the same time as the band passes through the mouth part m. Also, when the band is detached, the projecting plate portion 31 is
It exhibits the same effect as described above and is restored.

In the above embodiment, the reinforcing ribs 34, 3
5 is provided at the center of the recessed part 33 and the lower side of the band hook-shaped part 3 for reinforcement, and these reinforcing ribs 34 and 35 correspond to the width l of the band hook-shaped part 3. It is also possible to provide a plurality of them as appropriate.

[Effect of idea]

Since the present invention is as described above, it has the following effects.

(1) The opening of the band hook-shaped part provided at one end of the main body plate is made smaller than the diameter of the band normally used, and the projecting plate forming the opening is elastically restored. By inserting the band into the mouth, it can be used as both an endless band and a non-endless band.

(2) The band can be easily attached and detached by simply opening the opening of the band hook.

(3) Even if the tension of the band is partially insufficient, the opening of the opening is smaller than the diameter of a normal band, and the band engages with the projecting plate during use, so it cannot be separated from the opening. There is no.

(4) The entire hook is made of synthetic resin, and the sliding contact area with the aluminum wheel is formed into a gentle arc-shaped or linear flat part, which prevents the aluminum wheel from breaking when the aluminum wheel comes into sliding contact with the hook. obtain.

(5) Furthermore, since reinforcing ribs are formed on the outer periphery of the opening of the band hook-shaped part, the structure is robust.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional tire chain hook, FIG. 2 is a side view showing an embodiment of the present invention, and FIG. 3 is a front view of the same. DESCRIPTION OF SYMBOLS 1... Main body plate part, 2... Hook part for side chain, 3... Hook-shaped part for band, 31... Projection plate part, m... Mouth part.

Claims (1)

[Scope of utility model registration request] In a tire chain hook that is made of synthetic resin and has a side chain hook part at one end and a band hook part at the other end, the opening of the mouth part forming the hook part is It is formed to have a diameter smaller than the diameter of the band normally used, and a protruding plate part is provided inside the opening so that it can be freely latched to the band, and the protruding plate part is formed so that it can be elastically restored. A tire chain hook characterized by having reinforcing ribs.