JP3057440B2 - Additional fasteners for tire anti-skid devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for a tire anti-skid device mounted on a tire of an automobile or the like.

[0002]

2. Description of the Related Art In a tire anti-skid device having a structure in which a plurality of cross members are stretched between two parallel side members,
Generally, a re-fastening device for re-tightening the side member is attached. As a conventional one, for example, there is a device having a configuration described in Japanese Utility Model Publication No. 8-6570.

As shown in FIG. 7, this conventional tightening device has a semi-annular cam groove 2 extending in an arc shape at an opening angle of 180 °, and is disposed close to one end 2a of the cam groove. And a hexagonal hole 5 which is provided in a projection surrounded by the inner circumferential groove wall of the cam groove 2 and in which a handle 4 for rotating the substrate 1 can be detachably mounted. One of the two connecting links 7 a and 7 b connected to the intermediate portion of the side members 6 and 6 is loosely inserted into the cam groove 2, and the other is inserted into the through hole 3. Are connected.

[0004]

However, in the above-mentioned conventional tightening tool, the connecting link 7a is moved from the other end 2b of the cam groove 2 to the one end 2a by rotating the base plate 1, and the through hole is formed. The side members 6 and 6 are tightened by the difference between the distance h1 between the third hole 3 and one end 2a of the cam groove 2 and the distance h2 between the through hole 3 and the other end 2b of the cam groove 2. Therefore, the amount of retightening is relatively small.

In order to increase the amount of tightening, the through holes 3
The distance h1 between the hole 3 and the one end 2a of the cam groove 2
What is necessary is just to increase the distance h2 between the substrate 1 and the other end 2b of the cam groove 2, but in this case, the substrate 1 itself also increases in size according to the distance.

Further, when the board 1 is rotated by the handle 4, the board 1 rotates around the through hole 3 into which the connecting link 7b is inserted. There is a drawback that it moves around and shifts, and the tightening operation is difficult.

Therefore, the present invention is to reduce the size,
An object of the present invention is to provide a tightening tool for a tire anti-skid device that can set a large amount of tightening and that can easily perform a tightening operation.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a tightening device comprising: a base;
Part 10 which can be inserted and withdrawn, and one end parts 11a, 11a
Near the turning part 10 and the other end parts 11b and 11
b is located farther from the turning portion 10 than the one end portions 11a, 11a, and a pair of arc-shaped link guide grooves 11 are arranged symmetrically with respect to the turning portion 10 and project in directions away from each other. , 11 are formed, and two connecting links 13, 13 having the same length, which are connected to the side members 8, 8, respectively, are freely movable along the pair of link guide grooves 11, 11. It has been inserted.

If the turning portion 10 is formed as a turning hole into which the handle 14 can be inserted, manufacture is easy. Furthermore, one end 11 of the link guide grooves 11
When the engagement step portions 11c, 11c for engaging the connection links 13, 13 are formed in the connection links 13, 1a, respectively.
3 is easy to lock.

When the handle 14 is rotated, the substrate 12 is rotated.
Rotates around the turning part 10, and according to this rotation,
The two connecting links 13, 13 are almost simultaneously kept in a state of being aligned on a straight line passing through the turning part 10, from one end 11a, 11a of the link guide groove 11, 11 to the other end 11b,
11b, whereby the side members 8, 8 can be retightened. When the handle 14 is rotated in the opposite direction, the board 12 rotates in the opposite direction about the turning part 10, and the two connecting links 1
3 and 13 are moved from the other end portions 11b and 11b of the link guide grooves 11 and 11 to the one end portions 11a and 11a almost at the same time while being aligned on a straight line passing through the turning portion 10, whereby the side member 8 is moved. , 8 can be released.

[0011]

Embodiments of the present invention will be described with reference to the drawings. A is a tire anti-skid device, which requires a plurality of cross members 9 between two side members 8, 8 arranged at regular intervals in parallel with each other, as shown in FIG. Spans at intervals of

The side members 8, 8 are, for example, a plurality of short links 8a... Connected to each other, and a fastener B according to the present invention is connected to an intermediate portion of one of the short links 8a. Although FIG. 1 shows an example in which only one additional fastener B is connected to the side member 8, two or more additional fasteners may be connected in consideration of the amount of additional tightening.

As shown in FIGS. 1 and 2, the tightening tool B has a front rectangular turning hole 10 as a turning portion, and a pair of link guide grooves 11, 11 symmetrical about the hole. A horizontally long substrate 12 having a substantially S-shaped profile, and two connecting links 1 for inserting the inner ends into the pair of link guide grooves 11, 11 and connecting the outer ends to a part of the side members 8, 8.
3 and 13.

The turning hole 10 is adapted to be removably fitted with a handle 14 for rotating the horizontally long substrate 12. In addition to the front rectangular shape shown in FIGS. 1 and 2, a polygon such as a triangle, a pentagon or more, or It can be formed in an elliptical shape.

The link guide grooves 11, 11 are formed in an arc shape having a required curvature projecting in a direction away from each other, and their one end portions 11a, 11a are connected to the turning portion 1 as described above.
0, and the other end 11b, 11b is connected to one end 11b.
It is located farther from the turning part 10 than a and 11a, and is arranged point-symmetrically about the turning part 10.

More specifically, as shown in FIG. 2, one end 11a of each of the link guide grooves 11, 11 is on a straight line C1 passing through the turning hole 10, and is mutually separated from the turning hole 10. The other ends 11b, 11b are separated by the same distances L1, L1 and the other end 11b, 11b is on another straight line C2 passing through the turning hole 10 and is separated from the one end 1 by the turning hole 10.
Distance L2 longer than distances L1 and L1 between 1a and 11a
It is separated by L2. That is, the relationship of distance L1 <L2 is established. Reference numerals 11c, 11c denote engagement step portions formed on the one end portions 11a, 11a of the link guide grooves 11, 11 for locking the connection links 13, 13, respectively.

If the angle α at which the two straight lines C1 and C2 intersect is made as close as possible to 0 °, that is, they are set so as to coincide with each other, the horizontally long substrate after retightening and after retightening, which will be described later. Twelve attitudes can be kept substantially the same.

The two link guide grooves 11, as described above,
In the case where the side member 8 is formed by rotating the horizontally long substrate 12 by approximately 180 degrees,
It can be tightened by the distance of 1).

The connecting link 13 connects the short link 8a of the side member 8 and the horizontally long board 12.
It is formed by forming a round bar into an oval endless annular shape, and is sized so as to be able to move smoothly along the link guide groove 11 while being inserted into the link guide groove 11.

Next, an operation of mounting the above-described tire anti-skid device A on a tire will be described. First, the additional fastener B according to the present invention is one of the two side members 8 of the tire anti-skid device A, specifically, as shown in FIG. One or more are connected to the side of the side wall surface in consideration of the diameter of the tire 15 and the like.

When the tire anti-skid device A is mounted on the tire 15, as shown in FIGS.
13 with the other end portions 11b, 1 of the link guide grooves 11, 11.
1b. In this state, after the tire antiskid device A is wound around the tire 15, as shown in FIG. 5, the connecting link 13 connects the horizontal substrate 12 to the end portion 11 a by the handle 14 inserted into the turning hole 10. Rotate so as to relatively move toward 11a.

According to this rotation, the connecting links 13, 13
Move relatively along the link guide grooves 11, 11 from the other end portions 11b, 11b toward the one end portions 11a, 11a substantially at the same time while being aligned on a straight line passing through the turning portion hole 10.

When the horizontally long substrate 12 is rotated by approximately 180 °, the connecting links 13, 13 move to the one end portions 11a, 11a of the link guide grooves 11, 11, as shown in FIG. , 11c to maintain the tightened state.

As a result, the side member 8 is
It is possible to retighten by a distance of (L2-L1), and the tire anti-skid device A can be securely mounted on the tire 15.

When a plurality of tightening tools B are connected, a part or all of the tightening tools B are appropriately tightened in consideration of the amount of looseness of the side member 8.

When the tire anti-skid device A is to be removed from the tire 15, the handle 14 is rotated in the opposite direction to that described above. As a result, the connecting links 13, 13 are relatively moved from the one end 11a, 11a of the link guide groove 11, 11 to the other end 11b, 11b while keeping the state of being aligned on a straight line passing through the turning portion hole 10. Then, the tightened state of the side member 8 is released, and the tire slip prevention device A is
It can be removed from.

The present invention is not limited to the above-described embodiment, but can be modified as follows. In the above description, the link guide groove may be formed in an arc shape having a required curvature, or may be formed along a specific curve, for example, a cycloid curve.

Further, although the example in which a turning hole is formed in a horizontally long substrate as the turning portion has been described as an example, a polygonal or elliptical convex portion may be formed, for example. In this case, the handle for rotating the horizontally long substrate has a configuration in which a concave portion is fitted to the convex portion.

Further, as long as the side member has two connecting links, a structure using a wire or the like may be adopted.

[0030]

According to the present invention, the following effects can be obtained. On the board, a turning part where a handle for rotating it can be inserted and removed, and one end near the turning part,
In addition, the other end is positioned farther than the one end from the turned portion, and a pair of arc-shaped link guide grooves which are arranged point-symmetrically around the turned portion and project in directions away from each other. The two connecting links having the same length and being connected to the side members are movably inserted along the pair of link guide grooves, so that the size of the side members can be increased while the size is reduced. The tightening amount can be set large.

When the retightening is performed, since the substrate rotates around the turning portion, the work can be easily performed.

If a turning hole into which the handle can be inserted is formed as the turning portion, the turning hole and the link guide groove can be processed at the same time, so that manufacture can be facilitated and an inexpensive one can be provided.

Since it is only necessary to adjust both of the pair of link guide grooves, it is possible to reduce the size of the substrate as compared with the conventional one even when increasing the tightening amount.

[Brief description of the drawings]

FIG. 1 is a front view of a tire antiskid device provided with a fastener according to the present invention.

FIG. 2 is an enlarged front view of the additional fastener.

FIG. 3 is a partial front view when the additional fastener is mounted on a tire.

FIG. 4 is a front view showing a state of a board and a connection link before a retightening operation is started.

FIG. 5 is a front view showing a state of a board and a connecting link during a tightening operation.

FIG. 6 is a front view showing the state of the board and the connecting link when the tightening operation is completed.

FIG. 7 is a front view of a conventional additional fastener.

[Explanation of symbols]

 Reference Signs List 8 side member 9 cross member 10 turning hole as turning portion 11a one end portion 11b other end portion 11c engaging step portion 11 link guide groove 12 horizontally long substrate as substrate 14 handle 15 tire A tire anti-slip device B tightening tool

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60C 27/06 B60C 27/10 B60C 27/12

Claims (3)

(57) [Claims] 1. A tightening device for a tire anti-skid device, comprising: connecting a plurality of cross members to one of two parallel side members having a plurality of cross members so as to retighten the side members; A turning portion on which a handle for rotating the handle can be inserted and removed, and one end portion is located near the turning portion, and the other end portion is located farther from the turning portion than the one end portion. A pair of arc-shaped link guide grooves which are arranged symmetrically with respect to the portion and project in the direction away from each other, and two connection links having the same length and mutually connected to the side members, respectively. Are further movably inserted along the pair of link guide grooves. 2. The tightening device for a tire anti-skid device according to claim 1, wherein the turning portion is a turning hole into which a handle can be inserted. 3. An engagement step portion for locking the connecting link is formed at one end of the link guide groove.
A fastener for the tire anti-skid device as described in the above.