JPH08310208A - Tightening device for antislipping tool for tire - Google Patents

Abstract

PURPOSE: To conduct the locking work on a tightening braid body more surely in a tightening device for a tightening braid body, which is used when an antislipping device for a tire is installed in, the tire, by effectively utilizing the centrifugal force that is generated during high speed traveling CONSTITUTION: In a braid locking mechanism 15, which makes a claw of a braid tightening body 24 cut into a tightening braid body 4, the position (M) of the center of gravity of the braid tightening body 24 is located at a position parted in the circumferential direction of the tire from a center (O) of shaft of rotation, so that the braid tightening body 24 rotates in the directin in which the depth of cut of the claw into the tightening braid body 4 becomes larger, owing to the centrifugal force generated during the rotation of the tire.

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 for mounting a tire anti-skid such as a tire chain on a tire.

[0002]

2. Description of the Related Art As a conventional tightening device for a slip stopper for a tire of this kind, as disclosed in, for example, Japanese Patent Laid-Open No. 6-328921, a widthwise end portion of the slip stopper extends along a loop. A non-stretchable tightening cord body that is held in contact with the tightening cord body, two string passages that pass through both ends of the tightening cord body, and a string locking mechanism that regulates the movement direction of the tightening cord body in each string passage. There is a device provided with the device main body, and an elastic cord that is connected to each end of the tightening cord body that comes out of the device main body and is hooked and held by the widthwise end of the anti-skid.

[0003] In this tightening device, a cord locking mechanism of the main body of the device is provided with a pair of cord tightening bodies pivotably supported in the cord passage around a pivot provided outside the cord passage. The spring includes a spring that biases the string tightener to project into the string passage, and an operation piece that can press the string tightener in the retracted direction from the string passage against the spring.

[0004]

However, although the cord tightening body is biased only in the direction of projecting into the cord passage by the spring, in the above-mentioned embodiment, the cord tightening body resists the biasing force of the spring when traveling at high speed. The cord tightening body may be urged to rotate in the direction of retracting from the cord passage, and the movement restriction of the tightening cord body with respect to the device main body is released, which causes the loosening of the entire slip stopper for the tire. It was

The present invention has been made in view of the above circumstances, and effectively utilizes centrifugal force of a tire in a tightening device that locks the tightening string with a string tightening body provided in the main body of the device. An object of the present invention is to provide a tightening device for a slip stopper for a tire, which can further ensure the locking of the tightening string by the string tightening body.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is a device main body including a tightening cord body that is held alongside the width direction end of a slip stopper for a tire, and a holding means that holds the tightening cord body at appropriate positions near both ends, and the device. An elastic cord connected to an end of the elastic cord body pulled out from the main body and hooked and held at a proper position in the width direction of the anti-skid, the holding means being provided in the main body of the device and the elastic cord body. A cord passage through which the cord is passed, and a cord tightening body that is swingably provided around the axis of the apparatus main body so as to enter the cord passage so as to restrict the movement of the tightening cord body in the cord passage. The centroid position of the string tightening body is urged in the direction in which the string tightening body is introduced into the string passage by the centrifugal force that acts on the string tightening body when the tire is rotated with the device body attached to the tire. It is characterized in that it is located farther in the tire circumferential direction than the shaft center.

Further, according to the present invention, a tightening cord body is held along a loop in a widthwise end portion of a tire anti-skid device, two cord passages for passing both ends of the tightening cord body, and the cord. A device main body equipped with a string locking mechanism that regulates the movement direction of the tightening cord body in the passage, and is connected to each end of the tightening cord body protruding from the device body at a proper position in the width direction of the anti-skid. An elastic cord that is hooked and held, and a cord locking mechanism of the device body is a pair of cord tighteners that are pivotally supported by a pivot and can freely move in and out of a cord passage, and the cord clamps that connect the cord clamps to each other. And a spring for urging the cord body to project inside, and the degree of protrusion of the cord clamp body into the cord passage is increased by the centrifugal force that acts on the cord clamp body when the tire is rotated with the device body attached to the tire. The center of gravity of the string tightening body is distant in the tire circumferential direction from the pivot in order to urge it in the direction. To have.

[0008]

In the string tightening body, since the string tightening bodies are positioned so as to increase the degree of protrusion into the string passage when the centrifugal force acts on the device body mounted on the tire, Sometimes, in addition to the spring bias, the centrifugal force of the tire also acts in the direction to project the string tightener into the string passage, and during high speed running, the string tightener enters the string passage due to the centrifugal force in addition to the spring bias. Since it is biased in the approaching direction, the tightening of the tightening cord body by the cord tightening body is further ensured, and the loosening of the anti-skid is prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of a tightening device 1 according to the present invention. This tightening device 1 is non-stretchable with respect to the device body 2 as is clear from the overall view shown in FIG. The tightening cord body 4 and the elastic cord body 5 are attached, and both ends of the tightening cord body 4 are inserted into the device body 2 to form a loop, and each end of the tightening cord body 4 that has come out of the device body 2 The stretchable cord body 5 is connected to the portion to be used in a loop shape.

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.
Also, as shown in FIG. 2, 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 outer peripheral portion of the apparatus main body 2 via an attachment piece 11 so as to be rotatable about an axis. This hook portion 10 is shown in FIG. 5 and FIG.
When the main body portion 51 of the tire anti-skid device 50 is connected in a ring shape as shown in FIG. Used to connect

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. The cord passages 14 are open to the main body 2 of the device on the left and right sides of the hook portion 10, the U-turn portions 19 that are opposed to each other and reciprocally separated from each other, and the cord passages 14 are opened on the lower sides of the inlet portions 18. And an outlet 20.

The cord locking mechanism 15 includes a pair of left and right cord tightening bodies 24 rotatably held by a pivot 23 provided outside the cord passage 14, and the cord locking bodies 24 rotate in one direction. Springs 26 that are urged dynamically, and the lock release portions 3 that rotate both left and right cord tightening bodies 24 in a direction against the springs 26 as necessary.
0. The cord tightening bodies 24 are symmetrical to each other on the left and right sides, and have a body plate portion 24a having a through hole 30 fitted to the pivot 23 as shown in FIG. 3, and an outer periphery of the body plate portion 24a. It has an outer edge portion 24c thickly formed so as to form a step portion 24b on the side, and a claw portion 24d protruding laterally from the outer edge portion 24c.

The outer edge portion 24c is provided with locking claws 27 and 28 that engage with the tightening cord body 4, and a snow discharge groove 29 is provided between the locking claws 27 and 28. The snow removal groove 29 removes snow that has entered between the locking claws 27 and 28 and the tightening cord body 4 by utilizing the centrifugal force generated by the rotation of the tire. The locking failure can be prevented. Further, in the outer edge portion 24c, frictional irregularities 3 are formed such that a number of fine diamond-shaped projections are aligned on the surface facing the string passage 14 (see FIG. 1).
1 is engraved. The friction unevenness 31 is formed by the tightening cord body 4.
The shape, the roughness, the arrangement, etc. are determined so as to be synchronized with the knitting pattern, and the tightening cord body 4 is prevented from loosening by increasing the frictional resistance.

The pivot 23 is positioned radially inward of the cord passage 14 (below the outlet portion 20 in FIG. 1) with the device body 2 mounted on the tire (see FIG. 6). The body 24 is fitted to the pivots 23 with the claw portions 24d facing each other. Spring 26
Are fitted to the respective pivots 23, and spring legs projecting in a bifurcated shape are fitted between the step portion 24b of the string tightening body 24 and the inner wall of the case portion 8 in a state in which a spring force is stored. Therefore, the string tightening body 24 is urged in a direction in which the locking claws 27 and 28 and the frictional unevenness 31 increase the degree of protrusion into the string passage 14 (the direction in which the claw portion 24d faces upward). Moreover, when a centrifugal force acts on the cord tightening body 24 due to rotation of the tire or the like, the degree of protrusion of the cord tightening body 24 into the cord passage 14 can be further increased. That is, the device body 2 is attached to the tire 6
The position of the center of gravity of the string tightening body 24 so as to urge the string tightening body 24 to rotate in the direction of entering the string passage 14 by the centrifugal force acting on the string tightening body 24 when the tire 60 is rotated in the state of being mounted on M is located farther from the axis O of the pivot 23 in the tire 60 circumferential direction.

Thus, the cord passage 1 provided in the apparatus main body 2
4 and a cord tightening body 24 swingably provided around the axis O of the apparatus main body 2 so as to enter the cord passage 14 so as to restrict the movement of the tightening cord body 4 in the cord passage 14. Tightening cord body 4
The holding means 40 is configured to hold the appropriate positions near both ends so that the holding position can be changed. On the other hand, in the center of the case portion 8, one vertical groove 3 is formed so as to divide the left and right cord passages 14.
2 is recessed, and in the vertical groove 32, an inverted T
A character-shaped operation piece 34 is housed so as to be vertically slidable. A lower head portion (a portion protruding to the left and right) of the operation piece 34 can be pressed against the claw portions 24d of the two string tightening bodies 24 from the upper side thereof. In addition, in the claw portion 24d of the string tightening body 24, the portion that receives the pressure of the operation piece 34 is the pressure receiving portion 33, and in the operation piece 34, the head portion that presses this pressure receiving portion 33 is the contact portion 35. ing.

That is, in the string locking mechanism 15,
The relative positional relationship between the pressure receiving portion 33 of the string tightening body 24 and the abutting portion 35 of the operation piece 34 is such that the pressure receiving portion 33 is radially inward when the device body 2 is mounted on the tire (see FIG. 6), The contact portion 35 is arranged so as to be radially outside. Therefore, even if a centrifugal force acts on the operation piece 34 due to rotation of the tire or the like, the contact portion 35 of the operation piece 34 does not press the pressure receiving portion 33 of the string tightening body 24. Therefore, it is possible to prevent the cord tightening body 24 from releasing the locking of the tightening cord body 4 due to this.

The operating portion 34 has a lid portion 9 (see FIG. 2).
The operation piece 34A is attached to the front surface side that penetrates through. These structures constitute the above-mentioned locking release portion 30, and if the operation piece 34A is moved downward in FIG. 1 (the direction opposite to the centrifugal force acting when the tire rotates), both cord tightening bodies will be moved. 24 is forcedly rotated against the spring 26, and the locking claw 2
7, 28 and the frictional unevenness 31 can be retracted from the cord passage 14 to freely move the tightening cord body 4 in the cord passage 14.

By the way, the operation piece 34 is provided with a step between the left and right contact portions 35. Therefore, the operation piece 34
When the moving operation is performed, first, the one contact portion 35 presses the pressure receiving portion 33 of the one string tightening body 24, and then the other contact portion 35 moves the pressure receiving portion 33 of the other string tightening body 24. It comes to press. Further, the pressure receiving portion 33 of the string tightening body 24 is located at a position farthest from the pivot 23 in the string tightening body 24.
Due to this, the operation force for moving the operation piece 34 is reduced, and there is an advantage that both the cord tightening bodies 24 can be smoothly rotated.

A spring (not shown) for urging the sliding of the operation piece 34 may be loaded in the vertical groove 32 to enhance the operation smoothness of the operation piece 34A. By 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. 5, the tread surface of the tire 60 is covered with the main body portion 51 of the anti-skid device 50 from the upper side thereof, and one of the connecting holes 53 provided at both longitudinal ends of the tire main body 2 is connected to the main body portion 2. Hook one of the hook portions 10. And body part 5
The tightening cord body 4 is hooked on an appropriate number of hook metal fittings 52 provided at a plurality of widthwise end portions at a predetermined interval.

Next, the vehicle body 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 assembly 2 of the apparatus is fitted to the remaining portion of the connecting hole 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 slip stopper 50. As a result, the elastic cord 5 has a square shape as a whole, an appropriate contraction action is generated in the axial direction, and both ends of the tightening cord 4 are pulled out from the apparatus body 2 by the same appropriate amount. .

As shown in FIG. 1, in the device main body 2, the tightening cord body 4 in the cord passage 14 is moved in the normal direction (direction from the entrance 18 to the exit 20), so Body 2
4 attaches the locking claws 27, 28 and the frictional unevenness 31 to the tightening string body 4.
Is allowed to swing away from. 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 body 24 swings in the opposite direction to the above, and the locking claws 27 and 28 and the frictional unevenness 31 are attached to the tightening cord body 4. It bites in and blocks its movement. Therefore, the tensile force that once acts on the tightening cord body 4 does not loosen, and thus the tire anti-skid device 50 is firmly attached.

When the main body portion 51 of the anti-skid device 50 is biased toward the inside of the tire 60, the wearing condition may be loosened by running at a high speed. Since the urging force in the direction of contraction increases and the tightening cord body 4 is pulled more strongly, the tensile force acting on this tightening cord body 4 is also increased, the position of the anti-skid device 50 is corrected, and the wearing state is stabilized. Will be done.

When removing the tire slip stopper 50 from the tire 60, the operation piece 34A of the apparatus main body 2 is operated and moved in the above-described predetermined direction. Thereby, the contact portion 3 of the operation piece 34
5 presses the pressure-receiving portions 33 of both cord tightening bodies 24, and the tightening cord body 4
Therefore, it is possible to forcibly separate the string tightening body 24 in a biting state from this. If the elastic cords 5 are removed from the hook fittings 52 after doing this, the tensile force acting on the tightening cords 4 can be released and the elastic cords 5 can be removed from the anti-skid 50.

According to the first embodiment described above, the relative positional relationship between the pressure receiving portion 33 of the string tightening body 24 which receives the pressure of the operating piece 34 and the contact portion 35 of the operating piece 34 is the same as that of the apparatus main body 2. When the tire 60 is mounted on the tire 60, the pressure receiving portion 33 is arranged radially inside and the contact portion 35 is arranged radially outside. Therefore, the centrifugal force acting when the tire 60 rotates and the uneven road surface Even if the impact force generated when the vehicle travels acts on the operation piece 34, this force acts in the direction in which the contact portion 35 of the operation piece 34 and the pressure receiving portion 33 of the string tightening body 24 are separated from each other. The abutment portion 35 of the operation piece 34 does not arbitrarily press the pressure receiving portion 33 of the string tightening body 24, and the locking of the tightening string body 4 by the string tightening body 24 is released due to this. It can be prevented.

As the hooks 52, as shown in FIGS. 7A to 7D, the first hooking portion 54 to which the tightening cord body 4 is hooked and the elastic cord 5 are hooked. It is preferable to separately provide the second hook portion 55. According to such a configuration, the tightening cord body 4 and the elastic cord body 5 are prevented from slidingly contacting each other, and the elastic cord body 5 is tightened. The tightening of the string 4 can be smoothly performed. In addition,
Reference numeral 57 is a mounting portion of the tire slip stopper 50 to the main body portion 51.

8 to 10 show a tightening device 1 according to the present invention.
2 shows a second embodiment of the present invention. In the second embodiment, the device main body 2 has a rectangular shape, a pair of hook pieces 10a in the hook portion 10 are connected by a reinforcing plate 39, and a string tightening body. A coil spring is used at a position different from the pivot 23 (a toe-side back portion of the string tightening body 24) as a spring 26 for urging and pressing 24 toward the string passage 14, and the upper end side of the operation piece 34 is at the device main body 2 ( It is different from the first embodiment in that it is projected upward from the case portion 8).

Furthermore, regarding the shape of the cord tightening body 24,
As shown in FIG. 10, a thick portion is formed around the through hole 30 fitted into the pivot 23, and locking claws 27 and 28 that mesh with the tightening cord body 4 are provided over the entire thickness, and the locking claws 27 and 28 are provided.
In that the snow removal groove 29 provided between is provided on both front and back sides,
This is different from the first embodiment. Such a structure can improve the strength of the string tightening body 24 and enhance the biting force with the tightening string body 4, while being useful in enhancing the snow removal effect.

The other constructions, functions and effects are the same as those of the first embodiment, and therefore the same reference numerals are given and detailed description thereof is omitted. 11 to 13 show a third embodiment of the tightening device 1 according to the present invention. In the third embodiment, the pivot 23 of the string locking mechanism 15 is in a state in which the device body 2 is attached to the tire. It is positioned so as to be radially outside of the cord passage 14 (above the outlet portion 20 in FIG. 11).

A T-shaped operation piece 34 is vertically slidably housed in a vertical groove 32 provided in the center of the case portion 8. The upper head of the operation piece 34 is slidable. The (overhanging portion to the left and right) can be pressed against the pressure receiving portions 33 of both cord tightening bodies 24 from above. That is, the contact portion 35 of the operation piece 34 is provided on the lower surface side of the head portion that protrudes to the left and right.

As is apparent from the above, even in the cord locking mechanism 15 of the third embodiment, the relative pressure between the pressure receiving portion 33 of the cord tightening body 24 and the contact portion 35 of the operating piece 34. The physical relationship is such that the pressure receiving portion 33 is on the inside in the radial direction and the contact portion 35 is on the outside in the radial direction when the device body 2 is mounted on the tire (see FIG. 6). for that reason,
Even if a centrifugal force acts on the operation piece 34 due to rotation of the tire or the like, the contact portion 35 of the operation piece 34 does not press the pressure receiving portion 33 of the string tightening body 24. Further, when centrifugal force acts on the cord tightening body 24 due to rotation of the tire or the like, the fact that the cord tightening body 24 further increases the degree of protrusion into the cord passage 14 is the same. Substantially the same effects as those of the first and second embodiments can be obtained.

Incidentally, in the cord tightening body 24 of the third embodiment, as shown in FIG. 13, a spring shaft 42 is provided at the opening edge of the through hole 30 fitted into the pivot shaft 23, and the spring 26 is attached to the spring shaft 42. Is fitted on the outside. The present invention is not limited to each of the above-mentioned embodiments, and the design can be changed appropriately. For example, although a step is provided between the left and right contact portions 35 in each of the above-described embodiments, such a step may not be provided.

[0033]

According to the present invention, a centrifugal force acting on the cord tightening body when the tire is rotated with the main body of the device attached to the tire biases the cord tightening body in the direction in which it enters the cord passage. Therefore, the center of gravity of the string tightening body is located further away from the shaft center in the tire circumferential direction, so that the centrifugal force of the tire is effectively utilized to further ensure the locking of the tightening string body by the string tightening body. can do.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an apparatus main body according to a first embodiment of the present invention.

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

FIG. 3 is an enlarged perspective view showing the cord tightening body.

FIG. 4 is an overall view showing the tightening device of the embodiment.

FIG. 5 is a perspective view showing a procedure for mounting the tire anti-skid device.

FIG. 6 is a perspective view showing a mounting state of the tightening device.

FIG. 7 is a perspective view showing an example of a hook of the tire anti-skid device.

FIG. 8 is a front sectional view showing an apparatus main body according to a second embodiment of the present invention.

FIG. 9 is an overall view showing a tightening device of a second embodiment.

FIG. 10 is an enlarged perspective view showing the cord tightening body.

FIG. 11 is a front sectional view showing a device body according to a third embodiment of the invention.

FIG. 12 is an overall view showing a tightening device of a third embodiment.

FIG. 13 is an enlarged perspective view showing the cord tightening body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening device 2 Device main body 4 Tightening string body 5 Stretchable string body 14 String path 15 String locking mechanism 23 Axis 24 String tightening body 26 Spring 34 Operating piece 40 Holding means 50 Tire slip device O Tire swinging shaft Heart M Center of gravity of the tightened body

Claims (2)

[Claims] 1. A tightening cord body (4) which is juxtaposed and held at an end portion in the width direction of a tire anti-skid device (50), and a holding means (holds a proper position near both ends of the tightening cord body (4). 40) and a device main body (2) provided with the device main body (2) and an end portion of the tightening cord body (4) pulled out from the device main body (2), and are hooked and held at appropriate positions in the width direction of the anti-skid (50). An elastic cord (5) is provided, and the holding means (40) is provided in the device body (2) and a cord passage (14) through which the tightening cord (4) is passed, and a cord passage (14). ), A string tightening body (2) swingably provided around the axis (O) in the device body (2) so as to enter the string passage (14) so as to restrict the movement of the tightening string (4). 24) and the device main body (2) is attached to the tire by the centrifugal force acting on the string tightener (24) when the tire rotates. The center of gravity position (M) of the string tightening body (24) is located at a position further away from the shaft center (O) in the tire circumferential direction in order to urge the string tightening body (24) toward the inside of the string passageway (14). An anti-skid tightening device for a tire, which is characterized in that 2. A tightening cord body (4) which is juxtaposed and held in a loop shape at an end portion in the width direction of a tire anti-skid device (50), and two tightening cord bodies (4) which pass through both ends thereof. An apparatus main body (2) comprising a string passage (14) and a string locking mechanism (15) for restricting the movement direction of the tightening string body (4) in the string passage (14);
An elastic cord (5) which is connected to each end of the tightening cord body (4) coming out of the device body (2) and hooked and held at a proper position in the width direction of the anti-skid (50), The string locking mechanism (15) of the main body (2) is attached to the pivot (2
3) and a pair of cord tightening bodies (24) pivotally supported by the cord passages (14) and capable of moving back and forth into the cord passages (14).
4) has a spring (26) for urging and projecting inward, and with the device body (2) attached to the tire, the cord is tightened by a centrifugal force acting on the cord tightener (24) when the tire rotates. A position in which the center of gravity (M) of the string tightening body (24) is separated from the pivot axis (23) in the tire circumferential direction so as to urge the body (24) in a direction in which the protrusion degree into the string passageway (14) increases. A tightening device for a tire anti-skid, which is characterized in that