JPH06328921A - Fastening device for tire skid prevention device - Google Patents

Abstract

PURPOSE:To affect quickly and uniformly tensile force acting along the axial direction on the whole length of a fastening cord body 200, which is used for throttling a plurality of metal hooks fitted to the width-direction ends of a tire skid prevention device towards the rotation center of the tire. CONSTITUTION:A fastening device 1 comprising two cord locking mechanism 20, which can hold both ends of a fastening cord body 200 respectively, is provided in the device main body 2 and contraction/expansion members 50 such as rubber cord, etc., for being hanged on a metal hook at an appropriate point are connected to both ends of the fastening cord body 200 coming out from the fastening device 1. Both ends of the fastening body 200 are drawn out together from the fastening device 1 by tensile force of the contraction/ expansion members 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening device used when a tire anti-skid device such as a tire chain is attached to a tire.

[0002]

2. Description of the Related Art There are various types of anti-skid devices for tires in which the main body has a ladder shape or a net shape, and there are various materials such as metal, resin and rubber. To attach these anti-skid devices to a tire, wrap the main body part around the tread surface of the tire, and hang the tightening cord body between the hook metal fittings that are attached at multiple intervals at the widthwise ends. By holding this in a polygonal or circular shape along the side surface of the tire and applying a tensile force in the axial direction to this tightening cord body, each hook fitting can be narrowed toward the center of rotation of the tire. To do.

Incidentally, in order to apply a tensile force to the above-mentioned tightening cord body, there is a case where a stretchable material such as a rubber cord or a spring wire is used for a part or the whole thereof and the tension of itself is utilized. Recently, a tightening device for generating a tensile force is often connected to a tightening cord body separately. This tightening device is provided with a case and a pulling tool that can be pulled out from the inside of the case against a spring force. The other end of the tightening cord is connected and used. If this tightening device is used, a non-stretchable one such as a wire rope can be used as the tightening cord body.

[0004]

In the conventional tightening device, the extension of the expansion and contraction stroke of the spring for pulling and pulling the pulling tool is limited in structure, so that the pulling force acting on the tightening cord body is strengthened. There was a limit to this. Further, in this tightening device, it is usual to fix the position by hooking the case on the hook fitting of the anti-skid device for the tire, and the pulling force is applied unilaterally only on the pulling tool side. Was becoming. Therefore, due to the slip resistance of the tightening cord with respect to the hook metal fitting, it takes a considerable amount of time for the tensile force to reach the entire length (until the wearing condition of the anti-skid device on the tire is naturally corrected by running vibration etc.). In some cases, it is not possible to apply a uniform tensile force over the entire length of the tightening cord body.

The present invention has been made in view of the above circumstances, and is a tightening device for a tire anti-skid device, which is capable of quickly and uniformly applying a tensile force to the tightening string over its entire length. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a non-stretchable tightening cord body hooked and held along an end portion in the width direction of a tire winding non-slip device, and both end portions of this tightening cord body are inserted from an inlet to an outlet. A device main body in which at least two cord passages are formed, and a pair of cord ties that allow the tightening cord body in the cord passage provided in the device main body to move in the forward direction but prevent it in the opposite direction. It is characterized in that it comprises a stop mechanism and an elastic member which is connected to both ends of the tightening cord body and is capable of expanding and contracting in the axial direction.

In the elastic member, a portion which is to be hooked and held together with the tightening cord body at the widthwise end portion of the tire winding anti-slip device is replaced with a non-stretchable reinforcing member, or It is preferable to bury and reinforce with a non-stretchable core material. The elastic member may be formed in a series so as to form a loop over the both ends of the tightening cord body, regardless of whether the reinforcing member or the core member is provided in the middle of the elastic member.

As the above-mentioned string locking mechanism, a tongue is provided at a side portion of the string passage, and a swing center is arranged closer to the pull-in port than the toe and is swingably held. From the stop claw tool, the spring for urging the locking claw tool toward the string passage side, and the lock release mechanism for forcibly swinging the locking claw tool in the direction against the spring when necessary. Can consist of

Further, as a structure different from the above in the string locking mechanism, a rotary drum rotatably provided at a side portion of the string passage and having an outer peripheral surface as a string winding surface, and this rotary drum And a reverse rotation prevention mechanism that is provided as an option. Particularly, in the cord locking mechanism of this configuration (configuration having a rotating drum), the cord passages are arranged adjacent to each other so as to be arranged in the center, and both rotating drums are engaged with each other at least at one end side. It is also possible to provide the outer ring teeth for holding the rotation directions of No. 1 and No. 2 in an inverse relationship and to provide the reverse rotation preventing mechanism only for one of the rotating drums.

It is preferable that a hook portion is provided on the main body of the apparatus for connecting both longitudinal ends of the main body of the tire anti-skid device when the main body is connected in a ring shape.

[0011]

According to the present invention, after the tightening cord bodies forming a loop on both sides of the main body of the device are hung on the hook fittings of the anti-slip device wound around the tire, The elastic members pulled out through the both ends of the tightening cord body on both outlet sides are hooked on the hook fittings at appropriate positions of the anti-skid device. As a result, an urging force is applied to the elastic member in the direction of contraction along the axial direction, so that both ends of the tightening cord body are pulled so that each cord passage of the main body of the device can be moved in the normal direction (from the inlet to the outlet). Direction)
Then, a pulling force acts so that both sides of the device main body are drawn to each other. Therefore,
It is possible to speed up and uniformize the action of the tensile force over the entire length of the tightening cord body. Since the tightening cord body pulled in the string passage in the forward direction is held by the cord locking mechanism so as not to be returned to the original state, the tension force once acting does not loosen.

If a reinforcing member and a core material are provided in the middle of the elastic member, after the tightening cord body is hung over the hook fitting of the anti-slip device wound around the tire, the elastic member is then hooked at an appropriate position. When hooked on the metal fitting, the embedding part of the reinforcing member or the core material can be hooked on the hook metal fitting, so that the stretchable portion of the elastic member can be prevented from rubbing against the tightening cord body.

If the elastic member having a long overall length extending over both ends of the tightening cord body is used, the amount of expansion and contraction, that is, the tensile force applied to the tightening cord body can be increased according to the length. As a string locking mechanism, a structure that uses a pair of locking claws to obtain a strong locking force for the tightening string body, and a pair of rotating drums that simplify the structure and ensure the operation Can be adopted.

If the hook is provided on the main body of the apparatus, the structure can be simplified and the mounting work can be facilitated.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment of a tightening device 1 according to the present invention. As is clear from the overall view of FIG. 1, this tightening device 1 is a non-stretchable device provided in a tire antiskid device. The tightening cord body 200 and an elastic member 50 which can be expanded and contracted in the axial direction are attached, and the device body 2 of the tightening device 1 holds the tightening cord body 200 at appropriate positions near both ends. In addition to forming a loop, the elastic members 50 are connected to both ends of the tightening cord body 200 and used as a loop. The tightening cord body 200 is formed of a fiber material such as cotton or hemp, a metal wire (wire), a resin wire or the like, and the elastic member 50 is a rubber cord or the like.

As shown in FIGS. 2 to 4, the tightening device 1 includes:
It has a device body 2 and two string locking mechanisms 20 provided inside the device body 2. The device main body 2 has a structure that can be disassembled into a case body 3 and a lid body 4 that covers the front surface of the case body 3. Inside the case body 3, two parallel holding shafts projecting toward the lid body 4 are provided. 8 are provided. Lid 4
Has a fitting relationship with the projecting end of the holding shaft 8 and is positioned with respect to the case body 3, and is closed and fixed by a bolt 9. An inlet 5 and an outlet 6 are formed on both side surfaces of the case body 3, and a portion from the inlet 5 to the outlet 6 by making a U-turn along the outer peripheral portion of the holding shaft 8, A string passage is provided for inserting the tightening string body 200. Further, a hook portion 7 is swingably attached to an appropriate position on the outer peripheral portion of the case body 3. As shown in the usage state of the tightening device 1 in FIGS. 7 and 8, the hook portion 7 is a main body portion 10 of the tire antiskid device 100.
It is used to connect both ends in the longitudinal direction when connecting 1 in a ring shape. The device main body 2 is preferably formed of a resin material in order to reduce the weight.

The string locking mechanism 20 unidirectionally urges the locking claw 21 which is swingably fitted around the holding shaft 8 and the swing of the locking claw 21. It includes a spring 26 and an unlocking mechanism 30 that swings the locking claw 21 in a direction against the spring 26 when necessary. As shown in FIGS. 5 and 6, the locking claw 21 has a through hole 22 fitted into the holding shaft 8.
A semi-cylindrical portion 21a formed around the
1a has a protruding portion 21b formed toward the opposite side through the through hole 22, and the claw 23 is formed on one surface side in the width direction of the protruding portion 21b. Further, the locking claw 21 is provided with a widthwise rib 24 projecting about half around the opening peripheral portion of the through hole 22 and extending to the portion where the claw 23 is formed. As shown in FIGS. 2 and 4, when the locking claw 21 is fitted to the holding shaft 8, the spring 26 is housed inside the rib 24, and one end of the spring 26 corresponds to the claw 23 of the rib 24. The other end of the spring 2
A spring force is generated in 6 and it is fitted into a slit 10 (see FIG. 3) formed on the side surface of the case body 3. Therefore, the locking claw 21 is wound around the semi-cylindrical portion 21a of the locking claw 21 from the drawing-in port 5 of the device body 2 toward the discharge port 6, and The spring 26 urges the pawl 23 to be strongly bitten by the portion immediately in front of the discharge port 6.

The engaging claw tool 21 includes a rib 24 and a claw 2
A tongue piece 31 is provided so as to project in a direction opposite to the direction of 3. On the other hand, as shown in FIG. 2, the device body 2 is provided with an operation piece 35 having one end protruding outwardly of the case body 3 and slidably held between the two locking claws 21. ing. The tongue piece 31 of each locking claw 21 is engaged with the end of the operation piece 35 inside the case body 3. These structures constitute the above-mentioned lock release mechanism 30, and when the operation piece 35 is pushed in, both lock claws 21 are forcibly swung in the direction against the spring force of the spring 26. , Tightening string 200 to nail 2
3 comes to separate.

Using the tightening device 1 thus constructed,
A situation in which the tire anti-skid device 100 is attached to the tire 300 will be described. As shown in FIG. 7, from the upper side of the tread surface of the tire 300, the main body portion 10 of the antiskid device 100
1, and one of the connecting holes 103 provided at both ends in the longitudinal direction is hooked with one of the hook portions 7 of the tightening device 1. Then, the tightening cord body 200 is hooked on an appropriate number of hook fittings 102 provided at a plurality of intervals on the widthwise end of the main body portion 101 at predetermined intervals. Next, the both ends of the main body 101 are made to be along the tread surface of the tire 300 by slightly backing the automobile, and the other of the hook portions 7 of the tightening device 1 is attached to the rest of the connecting holes 103. Hook to connect both ends. Further, the tightening cord body 200 is hooked on all the remaining hook metal fittings 102, and as shown in FIG. 8, the central portion of the elastic member 50 is hooked on the hook metal fitting 102 positioned on the side opposite to the tightening device 1. Then, the center portion of the telescopic member 50, which is folded in two, is hooked on the hook metal fittings 102 at the opposite positions,
Make the shape of the whole square. This causes the elastic member 50 to contract, so that both ends of the tightening cord body 200 are pulled out from the tightening device 1. As shown in FIG. 2, in the tightening device 1, the locking claw 21 is moved by the amount by which the tightening string body 200 in the string passage is moved in the normal direction (the direction from the drawing port 5 to the discharge port 6). Nail 23
(See FIG. 5) is allowed to swing in the direction in which it separates from the tightening cord body 200. Therefore, in the tightening cord body 200, both sides via the tightening device 1 can be drawn around the tightening device 1 by the pulling action of the both ends of the elastic member 50, thereby quickly and uniformly over the entire length. Tensile force is generated. However, when the tightening cord body 200 tries to move in the direction opposite to the forward direction, the locking claw 21 swings in the direction opposite to the above direction and is bitten into the tightening cord body 200 so as to prevent the movement. . Therefore, the tension force that once acts on the tightening cord body 200 is not loosened, whereby the tire anti-skid device 100 is firmly attached.

When the main body portion 101 of the anti-skid device 100 is biased toward the inside of the tire 300, loosening may occur in the mounting condition due to high speed running. Since the urging force in the contraction direction increases and the tightening cord body 200 is pulled more strongly, the tensile force acting on this tightening cord body 200 is also increased,
The position of the anti-skid device 100 is corrected and the wearing state is stabilized.

The tire anti-skid device 100 is installed in the tire 300.
In order to remove the locking claw 21 from the elastic member, the operation piece 35 of the tightening device 1 can be pushed in to forcefully disengage the locking claw 21 from the tightening string body 200. By removing 50 from each hook fitting 102, the tensile force acting on the tightening cord body 200 can be released.

FIG. 9 shows a second embodiment of the present invention. The difference from the first embodiment is that a non-stretchable reinforcing member 60 is provided at two locations along the stretchable member 50. There is a point. The tightening cord member 200 is attached to these reinforcing members 60.
The same material is used. If you do this,
When the elastic member 50 is to be hooked to the hook metal fitting 102 of the anti-skid device 100 (the tightening cord body 200 is already hooked as shown in FIG. 8), the reinforcing member 6 is used.
Since the 0 part can be hooked on the hook metal fitting 102, the elastic member 50 (the expandable portion, that is, the portion other than the reinforcing member 60) directly contacts the tightening cord body 200 or the hook metal fitting 102. You can avoid doing it. Therefore, the above-mentioned portion of the elastic member 50 will not be strongly rubbed by the tightening cord body 200 or the hook metal fitting 102 when the automobile is running, and the occurrence of cracks or breakage of the elastic member 50 can be prevented. By preventing breakage of the elastic member 50, it is possible to prevent damage to the vehicle body of the automobile. In the second embodiment, the device body 2
And the two portions where the reinforcing member 60 is provided,
The stretchable member 50 as a whole (including the reinforcing member 60) may be provided in a triangular shape.

FIG. 10 shows a third embodiment of the present invention. As with the second embodiment described above, a non-stretchable reinforcing member 60 is provided in the middle of the stretchable member 50. However, in the third embodiment, since the reinforcing member 60 is provided only at the symmetrical position of the apparatus main body 2 as the entire elastic member 50, it is possible to use only this portion to hook the hook metal fitting 102. it can. The action and effect are substantially the same as those in the second embodiment.

FIG. 11 shows a fourth embodiment of the present invention, in which non-stretchable core members 70 are embedded at three locations along the stretchable member 50. As the core material 70, resin fiber such as nylon, metal wire, carbon fiber or the like can be used. The action and effect produced by the core material 70 are slightly different from those of the second and third embodiments,
When the elastic member 50 rubs against the tightening cord body 200 or the hook metal fitting 102 to generate a crack, the core material 70 suppresses the growth of the crack.

In the present invention, it is not limited to connect the elastic members 50 in a loop shape, and different elastic members 50 may be connected to each end of the tightening cord body 200. 12 to 14 show the fifth embodiment of the present invention, and the difference from the first embodiment lies in the structure of the string locking mechanism 20. This string locking mechanism 20
Have a rotary drum 80 rotatable about a rotary shaft 81 as a main part. The outer peripheral surface of each rotary drum 80 is evenly distributed to prevent slipping protrusions 8.
It is a string winding surface for the tightening string body 200 having two. Therefore, the cord winding surface of the rotary drum 80 from the inlets 5 provided on both sides of the case body 3 (between adjacent ones).
Two cord passages which are bent in a U-turn shape and which reach the discharge port 6 through the above are formed. In the drawing, the tightening cord body 200 passing through each cord passage so as to be wound around each rotating drum 80.
Although the arrangement of the rotary drums 80 is determined so that a predetermined gap is formed between them, the rotary drums 80 may be arranged so that the tightening cord bodies 200 contact each other. On both ends of the rotary drum 80, outer ring teeth 83 projecting in the outer peripheral direction are circumferentially provided and meshed with each other. Therefore, if one rotating drum 80 rotates,
The other rotating drum also rotates in the opposite direction.

The rotary drum 80 arranged on the right side in FIG.
A reverse rotation prevention mechanism 90 is provided in the. As shown in FIG. 14, the reverse rotation preventing mechanism 90 includes a pawl piece 92 swingably fitted to a pivot shaft 91 provided on a shoulder portion of the case 3,
The spring 93 urges the claw piece 92 so that the toe 92a faces the outer ring teeth 83. The claw piece 92 is provided with a long recess 95 extending toward the toe 92a at the periphery of a through hole 94 fitted into the pivot 91, and a spring 93 fitted into the pivot 91 is provided in the recess 95. The one end portion 93a can be stored. The other end portion 93b of the spring 93 comes into contact with the inner surface of the shoulder portion of the case body 3 in a state where a spring force is generated in the spring 93. Therefore, the nail piece 9
No. 2 allows the rotary drum 80 to rotate in a predetermined direction (see the arrow in FIG. 12), but when it tries to rotate in the opposite direction, the toe 92a meshes with the outer ring teeth 83 and blocks it. It is supposed to do. Therefore, although the tightening cord body 200 is allowed to move in the normal direction (the direction from the drawing-in port 5 to the discharging port 6) in the cord passage,
Movement in the opposite direction will be blocked. Claw 92
, The end portion on the side opposite to the toe 92a is the operation portion 92b.
By pressing the operating portion 92b, the toe 92a is removed from the outer ring teeth 83 to allow the rotating drum 80 to rotate in the reverse direction (that is, the tightening cord body 200 to move in the reverse direction). .

The usage status and the like of this fifth embodiment are the same as those of the first embodiment.
It is substantially the same as the fourth embodiment, and detailed description thereof will be omitted. 15 and 16 show the sixth embodiment of the present invention, and like the fifth embodiment, the cord locking mechanism 20 is provided.
However, it has a structure having a rotating drum 80 which is rotatable around a rotating shaft 81 as a main part thereof. However,
On both ends of the rotary drum 80, outer ring claws 85 are provided so as to project in the outer peripheral direction thereof. Unlike the outer ring teeth 83 of the fifth embodiment, the outer ring claws 85 do not mesh with each other between the adjacent rotary drums 80. Therefore, this 6th
The rotary drum 80 of the embodiment rotates independently.

The outer ring claw 85 is dedicated to the reverse rotation preventing mechanism 90, and is formed in a saw-tooth shape so that the tip of the claw 85 is directed to the wake side when the rotary drum 80 normally rotates. As other configurations of the reverse rotation preventing mechanism 90, a claw piece 92 swingably held by a pivot shaft 91 provided between the case 3 and the lid 4 and the claw piece 92 is used.
2a has a spring 93 that biases the outer ring pawl 85 toward the outer ring claw 85. Since the operation of the reverse rotation preventing mechanism 90 is substantially the same as that of the fifth embodiment, detailed description thereof will be omitted here. Of the nail piece 92,
It is substantially the same as the fifth embodiment in that the end portion on the side opposite to the toe 92a is the operation portion 92b.

The usage status and the like of the sixth embodiment are the same as those of the first embodiment.
It is substantially the same as the fifth embodiment, and detailed description thereof is omitted here.

[0030]

Since the present invention has the above-mentioned structure and includes the two cord locking mechanisms, the pulling force of the elastic member is applied to both ends of the tightening cord body. Therefore, the tensile force can be made stronger (twice as much as the conventional one). Further, since the tightening cord bodies on both sides of the tightening device (apparatus main body) are pulled together around the tightening device in this manner, the tensile force acting on the tightening string body is swift and uniform over the entire length thereof. Will be distributed. As a result, a reliable mounting state of the anti-skid device for a tire can be obtained.

If a reinforcing member and a core material are provided in the middle of the elastic member, after the tightening cord body is hung over the hook fitting of the anti-slip device wound around the tire, the elastic member is then hooked at an appropriate position. When hooked on the metal fitting, the embedding part of the reinforcing member or the core material can be hooked on the hook metal fitting, so that the stretchable part of the elastic member and the tightening cord body or the hook metal fitting can be prevented from rubbing, As a result, it is possible to prevent the elastic member from cracking or breaking, prolong the life of the elastic member, and prevent the automobile from being damaged. Since the reinforcing member and the core material are non-stretchable, it is possible to obtain the effect of suppressing the tendency of the tire anti-skid device to swell toward the outer peripheral side of the tire due to the strong centrifugal force generated during high-speed traveling.

If the elastic member has a long overall length so as to form a loop over both ends of the elastic cord body, the amount of expansion and contraction can be increased by that much, so that the tensile force acting on the elastic cord body can be increased. When the structure including the locking claw tool is adopted as the string locking mechanism, a strong locking force with respect to the tightening string body can be obtained and the operation can be reliably performed.

When a structure having a pair of rotary drums is adopted as the string locking mechanism, the structure can be simplified, so that the outer diameter of the rotary drum is increased to such an extent that the entire apparatus body does not become too large. Therefore, the radius of curvature around which the tightening cord body is wound can be provided with a margin. Therefore, the reliability and smoothness of the operation are obtained, and the life of the tightening cord body is extended. Further, there is an advantage that malfunctions and the like due to biting of sand or ice are unlikely to occur.

When the hook is provided on the device body, it can be used both for fixing the position of the device body with respect to the anti-skid device and for connecting both longitudinal end portions when the anti-skid device is formed into a ring shape, thereby facilitating mounting work. Is planned.

[Brief description of drawings]

FIG. 1 is an overall view showing a tightening device according to the present invention.

FIG. 2 is a front sectional view showing a device body in an enlarged manner.

FIG. 3 is a view taken along the line AA of FIG.

FIG. 4 is an enlarged sectional view taken along line BB of FIG.

FIG. 5 is an enlarged front view of the locking claw tool.

6 is a view taken along the line CC of FIG.

FIG. 7 is a perspective view showing a procedure for mounting the tire anti-skid device.

FIG. 8 is a perspective view showing how the tightening device is attached.

FIG. 9 is an overall view showing a second embodiment of the present invention.

FIG. 10 is an overall view showing a third embodiment of the present invention.

FIG. 11 is an overall view showing a fourth embodiment of the present invention.

FIG. 12 is a front sectional view showing, in an enlarged manner, an apparatus main body according to a fifth embodiment of the present invention.

13 is a view taken along the line DD of FIG.

FIG. 14 is an enlarged perspective view showing an exploded view of a reverse rotation preventing mechanism in the fifth embodiment.

FIG. 15 is an enlarged front sectional view showing an apparatus main body according to a sixth embodiment of the present invention.

16 is a view taken along the line EE of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening device 2 Device main body 5 Draw-in port 6 Discharge port 7 Hook part 20 String locking mechanism 21 Locking claw tool 26 Spring 30 Locking release mechanism 50 Expandable member 60 Reinforcing member 70 Core material 80 Rotating drum 90 Reverse rotation preventing mechanism 100 Tire Anti-skid device 101 Main body part 200 Tightening cord body 300 Tire

Claims (7)

[Claims] 1. A non-stretchable tightening cord body hooked and held along an end portion in the width direction of an anti-slip device for winding a tire, and both ends of this tightening cord body can be inserted respectively from an inlet to an outlet. A device main body having at least two cord passages, and a pair of cord ties that allow the tightening cord bodies provided in the device main body to move in the forward direction but prevent the tightening cord bodies in the reverse direction. A tightening device for a tire anti-skid device, comprising a stopping mechanism and an axially expandable / contractible member connected to both ends of the tightening cord body. 2. A portion of the elastic member, which is to be hooked and held together with the tightening cord body at a widthwise end portion of a tire winding anti-slip device, is replaced with a non-stretchable reinforcing member, or The tightening device for a tire anti-skid device according to claim 1, characterized in that it is embedded and reinforced by a non-stretchable core material. 3. The tightening device for a tire anti-skid device according to claim 1, wherein the elastic member is formed in a series so as to form a loop over both ends of the tightening string body. 4. The cord locking mechanism is swingably held by a side of a cord passage, a toe of which is directed toward an outlet and a swing center of which is arranged closer to a drawing port than the toe. A locking claw, a spring for biasing the locking claw toward the string passage side, and a locking release mechanism for forcibly swinging the locking claw in a direction against the spring when necessary. The tightening device for a tire anti-skid device according to any one of claims 1 to 3, characterized in that 5. The cord locking mechanism includes a rotary drum having an outer peripheral surface rotatably provided at a side portion of the cord passage as a cord winding surface, and a reverse rotation preventing mechanism provided for the rotary drum. The tightening device for a tire anti-skid device according to any one of claims 1 to 3, further comprising: 6. The cord locking mechanism according to claim 5 is arranged adjacent to each other so that each cord passage is arranged in the center, and meshes with at least one end side of each rotary drum to rotate the rotary drums. Outer ring teeth to hold in an inverse relationship are provided,
The tightening device for a tire anti-skid device according to claim 5, wherein the reverse rotation preventing mechanism is provided only for one of the rotating drums. 7. The device main body is provided with a hook portion for connecting both longitudinal end portions when connecting the main body portion of the tire anti-skid device in a ring shape. The tightening device for a tire anti-skid device according to any one of 1 to 6.