JPH0840029A - Fastening device of tire antiskid device - Google Patents

Abstract

PURPOSE:To easily and reliably remove fastening string bodies even after high speed travel or the like is performed in a fastening device constituted so that the fastening string bodies are hooked in a loop shape along a width directional end part of an antiskid device and are held by acting tensile force on these when the tire antiskid device is installed on a tire. CONSTITUTION:When tensile force acts on fastening string bodies 4, though eccentric cams 24 are bitten in the fastening string bodies 4 in order to check these escaping movements, the fastening string bodies 4 are formed as a structure which does not contact with the eccentric cams 24 more than necessary. That is, the fastening string bodies 4 are prevented from winding round outer peripheral surfaces of the eccentric cams 24 until they reach outlet passage parts 20 from inlet passage parts 18 of string passages 14.

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.

In order to apply a tensile force to the tightening cord body,
A pulling device is often connected to one end of the tightening cord body. Some of these tensioning devices have various structures, but most of them have a portion for inserting the other end of the tightening cord body, and the other end of the tightening cord is pulled in the axial direction by a rubber cord or the like. It is provided with a structure for restricting the tightening cord body so that the tightening cord body moves in the pulling direction but does not move in the opposite direction at the insertion portion with or without applying force (Actual No. Sho 63-227410). , Actual Kaihei 2-51906
No., etc., hereinafter referred to as the first conventional example).

There is a technique described in Japanese Patent Application Laid-Open No. 64-78904 (hereinafter referred to as a second conventional example), which is slightly different from the above. In this technique, the suspending device is hooked in advance on the hook metal fittings at the three or four equally spaced positions on the circumference of the non-slip device, and a part of the circumference of the endless tightening cord body is picked to form a ring shape. While inserting this ring-shaped portion from the outer peripheral side of each lifting tool toward the rotation center direction of the tire, the ring-shaped parts that came out from each lifting tool are endless rubber rings around the rotation center of the tire. It is to connect. Each lifting device is provided with a structure that restricts the tightening cord body so that it does not move in the opposite direction but moves in the pulling direction.

[0005]

In the first conventional example, since the pulling force acting on the tightening cord body acts unilaterally only on the side of the pulling device, it can be applied to the hook fitting of the anti-slip device. On the other hand, due to the fact that the tightening cord is difficult to move, it takes a considerable amount of time until the tensile force spreads over its entire length (the time until the mounting state of the anti-skid device on the tire is naturally corrected due to running vibration, etc.). However, it is not possible to apply a uniform tensile force to the entire length of the tightening cord body.

Further, in the second conventional example, when inserting the ring-shaped portion of the tightening cord body in each lifting tool, the tightening cord body is attached to a movable member such as a roller or a swinging claw whose contact surface with the tightening cord body is notched. Since the wrapping is used to guide the turn, the movable member becomes excessively bite against the tightening cord body, especially after high-speed traveling, and the tightening cord body is tried to be removed. There was a problem that it would not come off.

The present invention has been made in view of the above circumstances, and enables the tensile force applied to the tightening cord body to act quickly and uniformly over the entire length thereof, and also after high speed running. Also, it is an object of the present invention to provide a tightening device for a tire anti-skid device, in which the tightening cord body can be easily removed.

[0008]

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 in a loop shape along the widthwise end portion of the tire anti-skid device, two string passages through which both ends of the tightening cord body are passed, and A device main body provided with a string locking mechanism for restricting the tightening string body in each string passage so that the tightening string body cannot escape and move, and a loop of the tightening string body connected to each end of the tightening string body protruding from the device body. In a tightening device for a tire anti-skid device, which comprises an expandable cord body that is hooked and held on the widthwise end of the anti-skid device inside, a cord locking mechanism of the device main body is provided inside the cord passage outside the cord passage. Tie provided with a variable protrusion amount to the cord, a spring for urging the tie towards the cord passage, and a lock release for forcibly retracting the tie when the need arises. The cord passage is configured to allow the tightening cord body to contact with a surface other than the surface of the cord fastener facing the inside of the cord passage. Is characterized in that path is formed having a stationary smooth surface in which guides without.

[0009] It is preferable that the cord fastener of the main body of the device is provided with a frictional unevenness in synchronization with the knitting pattern pattern of the tightening cord body on the surface facing the cord passage. The device main body is provided with a hook portion that is hooked and held at the widthwise end portion of the anti-skid device, and the cord passage is an entrance that directs inside the device main body from both left and right sides when the hook portion is used as a reference. A string, a U-turn part that folds back in the direction away from the hook part, and an exit part that follows the U-turn part. The string locking mechanism is provided between the entrance part of the string passage and the hook part. It is possible to make it the structure provided in.

[0010]

The elastic tightening cords are subjected to a pulling force so that the elastic cords connected to both ends of the tightening cords can pull the both sides around the main body of the apparatus, and both ends of the elastic cords have different cord locking mechanisms. Is kept in a state where it cannot be restored,
The tensile force that has once acted does not loosen. Therefore, the width direction end of each anti-slip device wound around the tire (each hook metal fitting)
A tensile force acts quickly and uniformly along the entire length of the tightening cord body.

The cord passage is other than the surface of the cord fastener facing the inside of the cord passage, that is, the surface of the cord fastener that presses the elastic cord body to restrict its movement (the surface on which frictional unevenness is formed). Has
The tightening cord body is guided so as not to come into contact with the cord tightening tool, and the inner surface of the passage is a stationary smooth surface. Therefore, the pulling force applied to the tightening cord body does not adversely affect the string tightening tool, and the releasing operation (the operation of removing the tightening string body) of the string tightening tool by the locking release portion can be easily performed.

If the string fastener is provided with friction unevenness, it does not damage the tightening string body (without cutting the fiber).
Moreover, an excellent anti-slip action can be obtained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As is clear from the overall view shown in FIG. 4, the tightening device 1 according to the present invention comprises a device body 2 to which a non-stretchable tightening cord body 4 and a stretching cord body 5 are attached. Both ends of the tightening cord body 4 are inserted into the device body 2 to form a loop, and the elastic cords 5 are connected to the respective ends of the tightening cord body 4 coming out of the device body 2 to form a loop shape. To use.

The tightening cord body 4 is made of knitted cotton, hemp or synthetic fiber. It should be noted that a metal wire (wire), a resin wire or the like may be bundled or braided, or a resin material or the like may be stretched to be formed. A rubber cord or the like is used for the elastic cord body 5. The device body 2 is shown in FIG.
As shown in FIG. 3, it has a structure that can be disassembled into a case portion 8 and a lid portion 9 that covers the front surface. These case parts 8
The lid 9 and the lid 9 are preferably made of a resin material in order to reduce the weight.

A hook portion 10 is attached to an appropriate position on the outer peripheral portion of the apparatus main body 2 (case portion 8) so as to be swingable back and forth. This hook portion 10 is for connecting both longitudinal end portions when connecting the body portion 51 of the tire anti-skid device 50 in a ring shape, as shown in the usage state of the tightening device 1 in FIGS. 7 and 8. Used. As shown in FIG. 1, two cord passages 14 are provided inside the apparatus main body 2, and a cord locking mechanism 15 is provided for each of these cord passages 14.

Each cord passage 14 is provided with an entrance portion 18 which is open on both left and right side surfaces of the apparatus main body 2 (case portion 8) when the hook portion 10 is used as a reference, and these entrance portions 18 are opposed to each other and approach each other. Then, after that, the U-turn portion 19 is folded back in a direction away from the hook portion 10 (downward in FIG. 1), and the exit portion 20 that opens to the left and right side surfaces of the case portion 8 after these U-turn portion 19 is formed. have. U-turn part 19
In the above, the surface in contact with the tightening cord body 4 is a smooth immovable surface so that the movement of the tightening cord body 4 can be smoothly guided.

The cord locking mechanism 15 is an eccentric cam-shaped cord tightening device which is swingable about a pivot 23 provided between the entrance 18 of the cord passage 14 and the hook 10. A tool 24 and a spring 26 for unidirectionally urging the swing of the cord tightening tool 24 are fitted. Further, a lock release portion 30 for swinging the left and right cord tightening tools 24 in a direction against the spring 26 when necessary is provided.

As shown in FIGS. 5 and 6, the cord fastener 24 has a body plate portion 24 having a through hole 30 fitted into the pivot 23.
a, an outer edge portion 24c formed thickly so as to form a step portion 24b on the outer peripheral side of the body plate portion 24a, and a claw portion 24d protruding laterally from the outer edge portion 24c. The string passage 14 (see FIG.
Friction irregularities 31 are engraved on the surface facing (see reference) so that a number of fine rhombus-shaped projections are aligned. The shape, roughness, arrangement, etc. of this frictional unevenness 31 are determined so as to match the knitting pattern of the tightening cord body 4. Therefore, if the tightening cord body 4 has a different knitting pattern, the shape of the frictional unevenness 32 is naturally different from that shown in the drawing.

As shown in FIG. 1, the cord fasteners 24 are symmetrically arranged on the left and right sides, and are fitted in such a manner that the claw portions 24d of the pivots 23 face each other. . Further, the above-mentioned springs 26 are fitted to the respective pivots 23, and the spring legs protruding in a bifurcated shape are formed by the step portions 2 of the cord tightening tool 24.
4b and the inner wall of the case portion 8 are loaded with a spring force stored therein. Therefore, the string fastener 24 has the frictional unevenness 31.
Is urged in a direction that increases the amount of protrusion into the cord passage 14 (direction in which the claw portion 24d faces downward).

On the other hand, in the central portion of the case portion 8, one vertical groove 33 is formed in a concave manner so as to divide the left and right cord passages 14, and the vertical groove 33 has a T-shape. Moving piece 34
Is slidable up and down. The head of the moving piece 34 (the portion that juts out to the left and right) is provided with the claw portions 2 of the cord tighteners 24.
4d can be contacted from below. Also this moving piece 3
An operation piece 35 is coupled to the front side of the housing 4 through the lid 9 (see FIG. 2). These structures compose the locking release section 30 described above, and when the operation piece 35 is moved toward the hook section 10, both cord tightening tools 24 are moved to the spring 26.
Can be forcibly oscillated in a direction against the spring force of the elastic cord, thus freeing the movement of the tightening cord body 4 in the cord passage 14.

A spring (not shown) for pushing up and urging the moving piece 34 may be loaded in the vertical groove 33 to enhance the smoothness of the operating piece 35. Using the tightening device 1 configured as described above, the anti-skid device 5 for tires
A situation where 0 is attached to the tire 60 will be described. As shown in FIG. 7, the tread surface of the tire 60 is covered with the main body portion 51 of the anti-skid device 50 from above, and one of the connection holes 53 provided at both ends in the longitudinal direction of the tire main body 2 of the device main body 2 is covered. Hook one of the hook portions 10. Then, among the plurality of hook metal fittings 52 provided at a predetermined interval at the widthwise end of the main body portion 51, every other suitable number of hook metal fittings 52 are attached to the tightening cord body 4.
I will hook.

Next, the vehicle is slightly backed up so that both ends of the main body portion 51 can be brought along the tread surface of the tire 60, and the hook portion 10 of the main body 2 of the apparatus is attached to the remaining connecting holes 53. Hook the other end to make a connection at both ends. Further, the tightening cord body 4 is hooked on all the remaining hook metal fittings 52. Next, as shown in FIG.
The appropriate number of points are hooked on the hook fittings 52 of the anti-skid device 50, and the procedure at this time is as follows. That is, as shown in FIG. 9 (a), the elastic cord body 5 having a loop shape is held via the device body 2 in the longitudinal direction, and the hooking portion 5 a is formed by bending. At the same time, the hook portion 5a is hooked on the hook metal fitting 52 farthest from the apparatus main body 2. The hook portion 5a is formed in the middle portion of the elastic cord body 5 in the longitudinal direction, and the hook portion 5a is positioned farthest from the apparatus main body 2, that is,
By hooking on the hook metal fitting 52 on the opposite side on the circumference, substantially the same tension is generated in the stretchable cord body 5 which is in a stretched state on both sides of the hook portion 5a.

Next, as shown in FIG. 9 (b), the elastic cord 5 is further folded at the intermediate portions of the two portions which are stretched between the hook portion 5a and the apparatus main body 2. While increasing the hooking parts 5b and 5c by the tune, these increasing hooking parts 5b and 5c are hooked on the hook metal fittings 52 at mutually opposite positions. Also in this case, as in the above case, the additional hook portions 5b and 5c are formed in the intermediate portions of the respective stretched portions, and the hook metal fittings 52 are positioned so that the hook positions are opposite to each other. The tension of the stretchable cord body 5 is substantially equal on both sides of the hanging portion 5b and both sides of 5c.

As a result, the elastic cord body 5 has a square shape as a whole, and an appropriate contraction action is generated in the axial direction thereof, and both ends of the tightening cord body 4 are pulled out from the main body 2 by the same appropriate amount. Like As shown in FIG. 1, in the apparatus main body 2, the cord tightening device 24 is moved by the amount that the tightening cord body 4 in the cord passage 14 is moved in the normal direction (the direction from the entrance 18 to the exit 20). The frictional unevenness 31 (see FIG. 6) is allowed to swing in the direction of separating it from the tightening cord body 4. Therefore, both sides of the tightening cord body 4 are drawn around the device body 2 by the pulling action of both ends of the elastic cord body 5, whereby a pulling force is quickly and uniformly generated over the entire length. However, when the tightening cord body 4 tries to move in the direction opposite to the normal direction, the string tightening tool 24 swings in the opposite direction, and the frictional unevenness 31 is caught in the tightening cord body 4 to prevent the movement thereof. To do.
Therefore, the tensile force that once acts on the tightening cord body 4 does not loosen, so that the tire antiskid device 50 is firmly attached.

The main body portion 51 of the anti-skid device 50 is the tire 6
If it is biased toward the inner side of 0, the wearing situation may be loosened by running at high speed, but in this case, the urging force of the elastic cord 5 in the contraction direction increases and the tightening cord body is increased. Since 4 is pulled more strongly, the pulling force acting on the tightening cord body 4 is also increased, and the position of the antiskid device 50 is corrected to stabilize the mounted state.

When removing the tire antiskid device 50 from the tire 60, the operating piece 35 of the device body 2 is operated. As a result, the moving piece 34 pushes up the claw portions 24d of the two string claws 24, and the string clamp 24 in a state of being bitten by the tightening string body 4 can be forcibly separated. At this time,
The string tightening tool 24 is in no contact with the tightening string body 4 except for the frictional unevenness 31. That is, unlike the second conventional example, since the tightening cord body 4 does not come into contact with the string tightening tool 24 in such a manner as to be wound around the string tightening tool 24, when the moving piece 34 swings the string tightening tool 24, The tensile force acting on 4 does not become a burden. Therefore, the operation piece 35
Can be easily operated.

According to the experiments by the present inventor, approximately 95 k
It was confirmed that the operation piece 35 could be lightly operated with a fingertip even after high-speed running exceeding m / h. If the elastic cord 5 is removed from each hook fitting 52 after doing this, the tensile force acting on the tightening cord 4 can be released and the elastic cord 5 can be removed from the antiskid device 50. In the present invention,
The string tightening device 24 is not limited to swinging, and may be linearly moved in and out of the string passage 14. As described above, the detailed configuration, shape, and the like can be appropriately changed according to the embodiment.

[0028]

EFFECTS OF THE INVENTION The tightening device according to the present invention has the above-mentioned structure, and the tightening cord body is stretched on both sides of the device body by the expansion and contraction string bodies connected to both ends thereof. Since the pulling force that receives the pulling force is applied, and the pulling force that has once acted is held by each different string locking mechanism, it is possible to apply the pulling force quickly and uniformly over the entire length of the tightening string body. become. Therefore, a reliable mounting state of the tire antiskid device can be obtained.

The cord passage is other than the surface of the cord fastener facing the inside of the cord passage, that is, the surface of the cord fastener that presses the elastic cord body to restrict its movement (the surface on which frictional irregularities are formed). Has
The tightening cord body is guided so as not to come into contact with the cord tightening tool, and the inner surface of the passage is a stationary smooth surface. Therefore, the pulling force applied to the tightening cord body does not adversely affect the string tightening tool, and the releasing operation (the operation of removing the tightening string body) of the string tightening tool by the locking release portion can be easily performed.

By providing frictional unevenness on the string tightening tool, it is possible to obtain an excellent anti-slip action without damaging the tightening string body (without cutting the fiber).

[Brief description of drawings]

FIG. 1 is a front view showing a main body of the apparatus with a lid part omitted.

FIG. 2 is a right side view of the apparatus main body.

FIG. 3 is a front view of the apparatus main body (when the lid is attached).

FIG. 4 is an overall view showing a tightening device according to the present invention.

FIG. 5 is an enlarged perspective view showing a cord fastener.

FIG. 6 is a bottom view of the cord fastener.

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 a diagram illustrating a procedure for attaching a tightening device (expandable cord).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening device 2 Device main body 4 Tightening string body 5 Expansion-contraction string body 10 Hook part 15 String locking mechanism 18 Entry part 19 U-turn part 20 Exit part 24 String fastening tool 26 Spring 30 Lock release part 50 Tire slipping device 60 tires

Claims (3)

[Claims] 1. A non-stretchable tightening cord body (4) hooked and held in a loop shape along the widthwise end of a tire anti-skid device (50), and both ends of the tightening cord body (4). A device main body (2) provided with two string passages (14) through which the string passages (14) and a string locking mechanism (15) that restricts the tightening string body (4) in each string passage (14) from escape movement are provided, It is connected to each end portion of the tightening cord body (4) coming out of the device body (2) and hooked and held on the widthwise end portion of the antiskid device (50) inside the loop of the tightening cord body (4). A tightening device for a tire anti-skid device comprising an elastic cord (5), wherein the cord locking mechanism (15) of the device body (2) is inside the cord passage (14) outside the cord passage (14). And a spring (26) for urging the string fastener (24) toward the string passage (14). And a lock release portion (30) for forcibly retracting the string tightening tool (24) in a direction against the spring (26) when necessary. (1
4) Tightening of an anti-skid device for a tire, characterized in that it is formed with a smooth surface that is immovable in a path that guides the tightening cord body (4) without contacting the surface other than the surface facing inward. apparatus. 2. The cord fastener (24) of the main body (2) of the device has frictional irregularities (31) on the surface facing into the cord passage (14) that is in synchronization with the knitting pattern pattern of the tightening cord body (4). The tightening device for a tire antiskid device according to claim 1, wherein the tightening device is carved. 3. The device body (2) is provided with a hook portion (10) projectingly hooked to the widthwise end of the anti-skid device (50), and the cord passage (14) is provided with the hook portion. An entry part (18) pointing from the left and right sides in the device body (2) when the (10) is used as a reference, and a U-turn part (19) which is subsequently folded back in a direction away from the hook part (10). And an outlet part (20) following this,
The tire according to claim 1 or 2, wherein the cord locking mechanism (15) is provided between the entry portion (18) of the cord passage (14) and the hook portion (10). Tightening device for anti-skid device.