JPH09193631A - Tightening device for tire slipper - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] To provide a compact and compact device for tightening a tire slip stopper. SOLUTION: A take-up reel 29 and a housing case 28 for rotatably housing the take-up reel 29 are provided, and a first ratchet tooth 30 is circular on the outer surface of one flange 29b of the take-up reel 29. The first ratchet teeth 3 are arranged on the inner surface of the housing case 28 while being circumferentially arranged.
A second ratchet tooth 31 that meshes with 0 is formed, and a spring 32 that engages the ratchet teeth 30 and 31 by pressing them against each other at all times is provided. The spring 32 is formed in the center of the ratchet tooth forming surface of the flange 29b by pressing. An operating projection 18 for releasing the meshing of the ratchet teeth 30, 31 against the biasing force of the spring 32 and rotating the take-up reel 29 by rotation is formed, and the end surface of the operating projection is accommodated. Operation portion exposing hole 34 formed in the case 28
Is exposed to the outside of the case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening device for a tire slip stopper used for mounting a tire slip stopper such as a tire chain on a tire.

[0002]

2. Description of the Related Art As a vehicle tire anti-skid device used in a snowy season, an anti-slip device formed of rubber or urethane resin is used in addition to a commonly used metal chain.

Although various anti-slip devices having various shapes and structures have been developed, almost the same method is adopted for mounting them on tires. In such a non-slip device, for example, as shown in FIG. 21, a non-slip body 40 has a net-like non-slip portion (a portion surrounded by a chain line in the drawing) 40a formed in a substantially strip shape as a whole, and the slip. Tightening ends 4 formed on both sides of the stopper 40a
0b and 40c. This non-slip body 40
A number of inner metal fittings 42a are attached to the tightening end portion 40b of the inner side (located inside the tire in the mounted state), and the outer side (located outside the tire in the mounted state) is tightened. A large number of outer fittings 42b are attached to the attachment end 40c. The inner metal piece 42a is loosely fitted with a rope 41 having a connecting fastener 41a at one end and a connecting loop portion 41b at the other end. In the figure, reference numeral 55 is a connecting end portion that connects both ends of the non-slip body 40 when it is wound around a tire.

When the anti-slip device is attached to a tire, as shown in FIG. 22, first, the anti-slip body 40 is wound around the tread portion of the tire 43 to connect both ends. Next, the inner side of the tire (invisible in the figure)
Tighten the rope 41 on the
a and the connecting loop portion 41b are connected to each other to form a ring having a predetermined diameter. Next, the rubber ring 44 is hooked on the outer metal fitting 42b on the outer side, and the outer metal fittings 42b are tightened toward the center so that the non-slip body 40 is mounted on the tire 43.

[0005]

However, in the above-mentioned anti-skid device, when mounting, it is necessary to carry out a very complicated work of successively arranging the rubber rings 44 on a large number of outer metal fittings 42b. If the tightening force of the rubber ring 44 is weak, the rubber ring 44 may be expanded in diameter by the centrifugal force applied to the anti-slip body 40 during traveling, and the anti-slip body 40 may come into contact with the fender and be damaged. On the other hand, if the tightening force of the rubber ring 44 is too strong, a very strong force is required at the time of mounting, resulting in extremely poor workability. Therefore, it is necessary to secure the necessary tightening force by using a plurality of rubber rings 44 without increasing the tightening force of the rubber ring 44 itself. For this reason, there is a problem that a great deal of time and labor are required for the work of hanging the plurality of rubber rings 44 on the large number of outer fittings 42b.

Therefore, in order to simplify the work of mounting the tire on the tire, as a device using a tightening cord member in place of the rubber ring 44, for example, an anti-slip device as disclosed in Japanese Patent Laid-Open No. 6-127224 is available. Proposed. As shown in FIG. 23, this one hooks a loop-shaped tightening cord member 46, in which an elastic member 47 is connected in the middle, on the outer metal fitting 42b of the anti-slip body 40, and the tightening cord member 46 is connected to the tightening device 45. It is designed to be wound up.

As shown in FIG. 24, the tightening device 45 includes a case main body 52, an operation cap 55 rotatably provided on one end side of the case main body 52 via a reverse rotation preventing mechanism 53, and a case main body. A reel barrel 56 provided on the other end side of 52 to rotate with the rotation of the operation cap 55 via a booster mechanism 60, and an outer ring 57 fitted further outside the case body 52. Is equipped with. The reverse rotation preventing mechanism 53 includes a rotating plate 54 and a claw piece 70 that fits in a notch 62 of the rotating plate 54. The claw piece 70 is formed at one end of the case main body 52 and has a wide mouth end. It meshes with the claw teeth 65 formed on the inner peripheral surface of the portion 66, and prevents the operation cap 55 and the reel cylinder 56 from being reversed. Further, this reverse rotation prevention mechanism is adapted to be released when necessary. The barrel portion 61 of the reel barrel 56 is formed with a groove 63 for fitting the tightening cord member across the rotation axis.

This tightening device 45 is shown in FIGS.
When the operation cap 55 is rotated while the tightening cord member 46 is fitted in the groove 63 of the reel barrel 56, the reel drum 56 is rotated accordingly and the tightening cord member 46 is rotated. Is wound around the outer peripheral surface of the body 61.

However, in the tightening device 45, since the reel barrel 56 housed in the case body 52 is rotated from the outside of the case body 52, the operation cap 55 is used.
The reel cap 5 is provided with the operation cap 55.
It is assembled to work with 6. Moreover, in order to prevent the reel cylinder 56 from rotating in the reverse direction, a reverse rotation preventing mechanism 53 composed of a plurality of parts is incorporated. Therefore, there is a problem that the internal structure of the device becomes very complicated, the number of parts is increased, and it takes time and effort to manage and assemble parts, resulting in an increase in cost. Moreover,
There is also a problem that the number of parts is large and the device itself is large due to its complexity.

In the tightening device 45, the reel cylinder 5 is
The reverse rotation of 6 is prevented only by engaging the claw teeth 65 on the inner peripheral surface of the wide mouth end portion 66 of the case main body 52 with the claw piece 70 of one tooth. Therefore, when a force in the reverse direction is applied, a large load is applied only to the one-tooth claw piece 70, and this claw piece 70 is easily damaged. Further, in order to prevent damage to the claw piece 70, the size of the claw piece 70 needs to be designed large, which causes a problem that the device itself becomes larger.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tightening device for a tire slip stopper having a simple structure and a low cost.

[0012]

In order to achieve the above-mentioned object, a tightening device for a tire slip stopper according to claim 1 of the present invention winds a tightening cord when the tire slip stopper is mounted on a tire. A device for tightening a tire anti-slip device for tightening a tire anti-slip device, comprising: a take-up reel that winds a draw string around the shaft and has a flange formed at both ends of the shaft; and the take-up reel is rotatably accommodated. And a storage case, which is formed on either the outer surface of one flange of the winding reel or the inner surface of the storage case facing the outer surface so as to idle in the winding direction and engage in the reverse direction. First of multiple
Ratchet teeth are circumferentially arranged, and second ratchet teeth that mesh with the first ratchet teeth are formed on the other surface of the ratchet case, and the ratchet outside the flange and inside the housing case are formed in the housing case. Equipped with an urging member that presses the teeth against each other and urges them toward each other at all times, and cancels the engagement of both ratchet teeth against the urging force of the urging member by pressing at the center of the ratchet tooth forming surface of the flange. In addition, an operating portion for rotating the take-up reel by rotation is formed, and an end surface of the operating portion is exposed to the outside of the case through an exposure hole formed in the housing case.

According to a second aspect of the present invention, a device for tightening a tire anti-slip device is the device for tightening a tire anti-skid device according to the first aspect, wherein a plurality of second ratchet teeth are circumferentially arranged. And these second ratchet teeth are
It is characterized in that it is adapted to mesh with each of the ratchet teeth.

That is, in the tightening device for the tire slip stopper according to claim 1 of the present invention, the reverse rotation prevention of the take-up reel is formed on the flange surface of the take-up reel and the inner surface of the housing case facing this surface. The first ratchet tooth and the second ratchet tooth are engaged with each other. That is, in this device, the reverse rotation prevention mechanism is
The ratchet teeth are formed by utilizing the flange surface of the take-up reel and the wall surface of the housing case. Therefore, it is not necessary to provide a complicated reverse rotation preventing mechanism as in the conventional case, and the internal structure of the device is simplified. Therefore, the number of parts is reduced, the labor required for parts management and assembly is significantly reduced, and the cost is reduced accordingly. Moreover, since the number of parts is small, the device itself can be downsized, and damage or failure is less likely to occur. Further, in this device, the operation of rotating the internal take-up reel from the outside of the housing case to wind the tightening cord can be performed by rotating the operation unit, and the operation of releasing the wound tightening cord can also be performed by the operation unit. It can be performed by pressing. In this way, since both the winding operation and the releasing operation can be performed with one operation section, the structure becomes simpler,
Moreover, the operation itself becomes simple.

Further, in the tightening device according to the second aspect of the present invention, the plurality of second ratchet teeth are circumferentially arranged, and the second ratchet teeth mesh with each of the first ratchet teeth. For this reason, even when a force is applied in the reverse direction, the plurality of ratchet teeth arranged circumferentially mesh with each other, so the load applied to each ratchet tooth is reduced, and the ratchet teeth are reduced. It is hard to damage the teeth. Moreover, since the load applied to each tooth is reduced, it is possible to design the ratchet teeth so that the peaks of the ratchet teeth are reduced, and the apparatus itself can be further downsized.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a tightening device (hereinafter referred to as "tightening device") for a tire slip stopper according to the present invention. In the figure, reference numeral 29 is a take-up reel for winding a drawstring (not shown), and 28 is a housing case which is formed in two parts and accommodates the take-up reel. The take-up reel 29 has a take-up shaft 29a.
Disc-shaped flanges 29b and 29c are formed on both ends of the first plate, and first ratchet teeth 30 are formed on the outer surface of the flange 29b on one side. On the other hand, second ratchet teeth 31 that mesh with the first ratchet teeth 30 are formed on the inner surface of the housing case 28 that faces the flange 29b on which the first ratchet teeth 30 are formed. Then, with the take-up reel 29 accommodated in the accommodation case 28, the first ratchet teeth 30 and the second ratchet teeth 31 are provided.
It is provided with a spring 32 for pressing and urging so as to mesh with.

More specifically, the take-up reel 29 is made of metal (aluminum), and the first ratchet teeth 30 having twelve teeth are circumferentially formed on the outer surface of the flange 29b on one side. The first ratchet teeth 30 are
It is formed so as to idle in the winding direction (arrow A in the drawing) and mesh with each other in the reverse direction. In addition, a disk-shaped operating projection 18 is formed in the center of the surface of the flange 29b on which the first ratchet teeth 30 are formed, and the take-up reel 29 is rotated on the surface of the operating projection 18. Elongated tool insertion hole 2 into which tools etc. are inserted when operating
6 are formed. The take-up reel 29 is shown in FIG.
As shown in FIG. 5, the winding shaft 29a is hollow and opens toward the surface where the ratchet teeth 30 are not formed, and the opening 36 is formed. Further, on the upper and lower portions of the outer peripheral surface of the winding shaft 29a, there are formed tightening cord fixing projections 33 for fixing the ends of the tightening cord 6.
Each of the tightening string fixing protrusions 33 has a screw hole 33.
a is drilled.

The accommodating case 28 (returning to FIG. 1) is made of plastic and is divided into two parts: an accommodating portion 28a for accommodating the take-up reel 29 and a lid portion 28b for covering it. .

The lid 28b has an inner back surface,
Twelve second ratchet teeth 31 that mesh with the first ratchet teeth 30 of the take-up reel 29 are circumferentially arranged. Further, an operation projection exposing hole 34 for accommodating the operation projection 18 of the take-up reel 29 is formed on a wall surface of a central portion surrounded by the second ratchet teeth 31.
On the other hand, in the accommodation part 28a, the spring 32 is accommodated on the inner rear surface thereof, and is housed in the opening 36 of the take-up reel 29 so as to rotatably support the take-up reel 29. Are formed to project. Further, a front portion of the peripheral wall of the accommodation portion 28a is cut out to form a tightening cord port 25 through which the tightening cord is inserted.

The accommodating portion 28a and the lid portion 28b include:
Clamping pieces 24 having rivet insertion holes 7a are respectively formed on the upper portion and the rear side portion thereof so as to project therefrom, and the gripping pieces 24 are adapted to be attached to the tire slip stopper. In addition, the accommodation portion 28a and the lid portion 28b.
Each of these has a screw insertion hole 28c formed in the front portion thereof through which a screw is inserted in the assembled state. In addition to the screw, a rivet or the like may be inserted into the screw insertion hole 28c to be caulked and fixed.

The tightening string is formed by braiding or weaving synthetic multifilaments into a belt shape. Then, as shown in FIG. 3, the two holes formed in the rear end portion of the tightening cord 6 are formed in the winding shaft 29a.
Are respectively inserted into the tightening string fixing projections 33 formed on the upper and lower sides of the above and fixed by the screws 33b and the washers 33c. From this state, the tightening string 6 is wound on the winding shaft 29a.
Is wound up and wound up. In this way, the tightening cord 6
By fixing the two positions of the rear end portion to the winding shaft 29a, even if the pulling cord 6 is accidentally pulled with an excessive force when pulling out the tightening cord 6, the pulling cord 6 is pulled from the winding shaft 29a.
Is hard to come off. The tightening cord 6 may be fixed by inserting the hole of the tightening cord 6 into the tightening cord fixing protrusion 33 and caulking the screw instead of screwing the tightening cord fixing protrusion 33.

In the above structure, the tightening device of the present invention is assembled as follows. That is, first, the spring 32 is housed in the shaft support cylinder 35 of the housing portion 28a of the housing case 28, and then the take-up reel 29 on which the tightening cord 6 is wound is housed in the housing portion 2 as shown in FIG.
It is accommodated in a state of being axially supported by the axially supporting cylinder 35 of 8a. At this time, the tightening cord 6 is inserted into the tightening cord inlet / outlet 25 of the accommodation portion 28a. Next, the first ratchet teeth 30 of the take-up reel 29 exposed from the opening of the accommodation portion 28a.
Then, the lid portion 28b is covered so that the second ratchet teeth 31 of the lid portion 28b mesh with each other, and a screw (not shown) is inserted into the screw insertion hole 28c and fixed with a nut (not shown).
In this state, as shown in FIG. 5, the operating projection 18 of the take-up reel 29 is exposed to the outside through the operating projection exposing hole 34 of the housing case, and the take-up reel 29 is
The spring 32 urges the first ratchet tooth 30 against the second ratchet tooth 31 of the housing case 28 and urges it.
In FIG. 5, 19 is a rivet that is inserted into the rivet insertion hole of the holding piece 24, and 1 is a tire slip stopper.
A rivet or the like may be inserted into the screw insertion hole 28c in addition to the screw, and the screw insertion hole 28c may be fixed by caulking. In addition to the rivet, a bolt or the like may be inserted into the rivet insertion hole 19 and a tightening device may be attached by tightening a nut.

The tightening device of the present invention can wind up the tightening string 6 as follows. That is, first, as shown in FIG. 6, the winding tool 27 is inserted into the tool insertion hole 26 of the operation projection 18 and rotated in the direction of the arrow D shown. Due to the rotation of the winding tool 27, the take-up reel 29 inside the housing case 28 is rotated from the initial state (the state in which the drawstring 6 is pulled out) shown in FIG. 7, and the drawstring 6 is attached to the take-up shaft 29a. Being rolled up. At this time, the first ratchet teeth 30 of the take-up reel 29 and the second ratchet teeth 31 of the housing case 28 are moved from the meshed state shown in FIG. As shown in (b), the first ratchet tooth 30 shifts above the second ratchet tooth 31. When it is further rotated, as shown in FIG. 8 (c), the tops of the first ratchet teeth 30 cross over the tops of the second ratchet teeth 31, mesh with the next ratchet teeth, and become the state shown in FIG. 8 (a). Become. When the first ratchet tooth 30 and the second ratchet tooth 31 mesh with each other, the take-up reel 29 does not rotate in the reverse direction. In this way, when the winding is continued, as shown in FIG. 9, the tightening string 6 is wound around the winding reel 29.

On the other hand, when pulling out the tightening cord 6,
As shown in FIG. 10, the operating projection 18 of the tightening device 7
Is pressed as indicated by an arrow B, the take-up reel 29 (both not visible in the drawing) slides in the pressing direction in the housing case 28 against the biasing force of the spring 32. The engagement between the first ratchet tooth 30 and the second ratchet tooth 31 is released. In this state, the tightening cord 6 is lightly pulled in the direction indicated by the arrow C, or, as described later, the take-up reel 29 is automatically reversed by elastic force of rubber or the like, and the tightening cord 6 is pulled out.

The attachment of the tire slip stopper 1 to the tire using the tightening device 7 is performed, for example, as follows.

FIG. 11 shows an example of a state in which a tire slip stopper is attached to a tire using the tightening device 7 of the present invention. In the figure, reference numeral 1 is a tire slip stopper formed in a four-divided shape, and both ends in the longitudinal direction are connected to each other and wound endlessly on a tire 43. Reference numerals 2a and 2b denote tightening end portions projectingly formed on the outer side of the tire slip stopper 1, and are arranged circumferentially along the side surface of the tire 43 in a state where the tire slip stopper 1 is wound. ing. 3 is a tightening end portion 2 at both end portions in the longitudinal direction of the tire slip stopper.
The connecting projections are formed inwardly at a, and are connected to the tightening end portions 2b adjacent to the inside thereof, and are pulled inward by the tightening device 7 of the present invention.

The tightening device 7 is shown in FIGS.
As shown in FIG. 3, the tightening cord 6 is the tightening cord entrance 25.
The elastic connecting member 5 made of synthetic rubber or urethane resin is connected to the tip of the tightening string 6. The elastic connecting member 5 has a substantially columnar tip connecting portion 1.
2, an approximately columnar tightening cord connecting portion 11, and an elastic stretchable portion 13 which is integrally formed so as to connect between the tip connecting portion 12 and the tightening cord connecting portion 11 and is stretched by being pulled by the tightening cord 6. It consists of The tightening string connecting portion 11 is provided with a tightening string insertion hole 11a through which the tightening string 6 is inserted, while the tip connecting part 12 has
Two hook insertion holes 12a through which hooks are inserted when connecting with the tightening end 2b of the tire slip stopper 1 and the connecting projection 3 are provided. In addition, the tip connecting portion 1
In FIG. 2, a reinforcing plate 16 made of steel and having a large number of holes as shown in FIG. 14 is inserted by insert molding. Then, the tightening string 6 is wound around the tightening device 7 and pulled so as to shorten the distance between the both connecting protrusions 3, whereby the tightening ends 2a, 2b are tightened.
Are tightened toward the center, and the elastic force of the elastic connecting member 5 causes each tire slip stopper 1 to move the tire 43
It is designed to be attached to the (see FIG. 11). FIG.
2, 17 is a fastener for fixing the tip end portion of the drawstring 6 in a ring shape. The leading end of the drawstring 6 may be fixed in a ring shape by sewing.

The tire slip stopper 1 will now be described in more detail.
As shown in FIG. 15, is formed integrally with a resin such as urethane or synthetic rubber, and the mesh-like non-slip portion 1a (the portion surrounded by a chain line in the drawing) has substantially the same width as the tire width. It is formed in a substantially strip shape as a whole. Tightening ends 2a, 2b are formed at predetermined intervals at four locations on the outer side of the non-slip portion 1a (located outside the tire 43 in the mounted state. In addition, the inner side (located inside the tire 43 in the mounted state).
An inner end portion 2c is formed at a position corresponding to the tightening end portions 2a and 2b (on the left side in the drawing). In the tire anti-skid tool 1, a hook or the like is inserted when the tire anti-skid tool 1 is connected to the tightening end portions 2a and the inner end portions 2c at both ends in the longitudinal direction. A hole 9 is provided.

Further, coupling protrusions 3 are formed on the tightening ends 2a at both ends of the outer side of the tire slip stopper 1 in the longitudinal direction so as to extend in directions substantially opposite to each other. These connecting protrusions 3 are provided at a predetermined angle α so as to face the circumferential direction along the side surface of the tire in a state where the anti-slip portion 1a is curved along the tread portion of the tire. An insertion hole through which a hook or the like is inserted when connecting the tightening device 7 and the elastic connecting member 5 to the connecting protrusion 3 and the tightening end 2b adjacent to the inner sides of the both ends, respectively. 22 is drilled.

In addition, 3 of the 4 inner ends 2c
A connecting rod 8 for connecting the tightening end portions 2c adjacent to each other is provided in a protruding manner at the location. These connecting rods 8 are also provided at the same predetermined angle α as the connecting protrusions 3. Then, as shown in FIG. 16, in a state where the tips of the connecting rods 8 and the adjacent tightening end portions 2c are connected, as shown in FIG.
The non-slip portion 1a is curved with a curvature along the tread portion of the tire. Further, when the tire slip stopper 1 divided into four parts is connected in this state, the slip stopper portion 1a is wound around the tread portion of the tire, and the inner end portions 2c are formed along the inner surface of the tire in a predetermined manner. They are arranged in a circle with the diameter of. In FIGS. 15 and 16, 10 is a spike tack. Also,
In FIG. 16, 23 is a metal fitting for connecting the inner end 2c and the tip of the connecting rod 8.

The tightening device 7 is shown in FIG. 17 and FIG.
As shown in FIG. 8, it is attached to the tire slip stopper 1. That is, the tip end connecting portion 12 of the elastic connecting member 5 is connected via the hook 14 to the connecting protrusion 3 on one end side and the tightening end portion 2b adjacent to the inner side thereof. Then, in the tightening device 7, the other end of the tightening end 2a and the connecting projection 3 are held by the holding piece 24, and the rivet 19 is inserted.
The connecting projection 3 and the tightening end 2 adjacent to the inner side thereof.
b.

The tire slip stopper 1 is mounted on the tire using the tightening device 7 of the present invention as follows. That is, first, both ends of the tire slip stopper 1 divided into four are connected to each other by hooks. Then, in the state where the tightening string 6 is pulled out from the tightening device 7 (see FIGS. 17 and 18), as shown in FIG.
The hook 15 which connects both ends of the tire slip stopper 1 is removed, and the tire slippery tool 1 is put around the tire 43. At this time, the inner end portions 2c connected by the inner connecting rods 8 are arranged along the inner side surface of the tire 43 in a circumferential shape having a predetermined diameter (hidden and invisible in the drawing).

Next, the tire 43 is rotated about a quarter of a turn, the hook 15 that has been removed is hooked, and the four tire slip stoppers 1 are connected endlessly and wound around the tire 43. . In this state, the tightening ends 2a, 2b are arranged in a substantially circumferential shape along the outer surface of the tire 43, but the tightening device 6 has not yet wound the tightening string 6,
Each tire slip stopper 1 is in a loose state.

Next, the tire slip stopper 1 divided into four parts
The tire slip stopper 1 is tightened in order by winding the tightening string 6 around the tightening device 7 attached to each of the above as described above. That is, the tightening device 7
20 is rotated by the winding tool 27 or the like to wind up the tightening cord 6, and the length of its extension is shortened, whereby the elastic connecting member 5 is extended, as shown in FIG. The elastic force pulls the connecting projections 3 so as to shorten the mutual distance (indicated by L ₀ in FIG. 17), and the distance between the connecting projections 3 is shortened (the distance after shortening is shown in FIG. 20). It becomes L ₁ shown in). In this way,
When the tightening string 6 is wound around each of the four tightening devices 7, the diameter of a virtual circle drawn by each of the tightening ends 2a and 2b circumferentially arranged along the tire side surface becomes small, and each tightening string 6 is wound. The attachment ends 2a and 2b are tightened toward the center, and each tire slip stopper 1 is attached to the tire 4
3 is attached.

At the time of the above-mentioned mounting, the elastic deformation of the elastic connecting member 5 serves as a cushion to prevent the tire slip stopper 1 itself made of urethane resin or synthetic rubber from being deformed or stretched. Further, the tightening force can be adjusted by arbitrarily adjusting the feeding length of the tightening string 6, and even if the tire slip stopper 1 is stretched, the winding amount of the tightening string 6 is increased. By tightening firmly, the tire 43 can be mounted without any problem. Further, the tightening force can be finely adjusted, and since the elastic expansion of the elastic connecting member 5 is provided, even if the accuracy of the device itself is somewhat poor, the device can be securely mounted. In addition, even when the tire slip stopper 1 is displaced from the tread portion of the tire during mounting, it can be mounted while adjusting the winding amount of the tightening string 6 of the tightening device 7 at four locations according to it. In addition, it is easy, and when the operation is started, the tire slip stopper 1 is automatically centered by the centrifugal force and the rubber force. Moreover, even if centrifugal force is applied during driving, the tire fits well. Further, since the elastic coupling member 5 is elastically deformed and the tire slip stopper 1 is attached to the tire, it can be attached corresponding to tires of various sizes.

On the other hand, when the slip stopper 1 is removed from the tire, as described above, the operation projection 18 of the tightening device 7 is pressed to release the engagement between the ratchet teeth 30 and 31 inside. Then, the tightening string 6 is automatically paid out by the restoring force of the elastic extension of the elastic connecting member 5, the distance L ₁ between the connecting protrusions 3 is returned, and each tightening end 2 is tightened.
The tire slip stopper 1 after the tightening to a and 2b is released.
Loosens and can be removed from the tire 43.

As described above, by using the tightening device 7, the tire slipper 1 is wound around the tire 43, and then the tightening string 6 is wound around the tightening device 7 to ensure that the tire 43 is securely attached to the tire 43. It can be attached, and the complicated operation of hanging a rubber ring on a large number of metal fittings as in the prior art is unnecessary.

Since the tightening device 7 forms the reverse rotation preventing mechanism (ratchet teeth 30, 31) by utilizing the flange surface of the take-up reel 29 and the wall surface of the housing case 28, the internal structure of the device is It will be easy. Further, the operation of rotating the internal take-up reel 29 from the outside of the housing case 28 to wind the tightening cord 6 is performed by the operation protrusion 1
In addition to the rotation of 8, the release operation of the wound drawstring 6 can be performed by pressing the operation projection 18. In this way, since both the winding operation and the releasing operation can be performed with the single operation protrusion 18, the structure is further simplified.

Further, in the tightening device 7, both the first ratchet teeth 30 and the second ratchet teeth 31 are circumferentially arranged, and the take-up reel 29 in a state where all the ratchet teeth 30 and 31 are in mesh with each other. Since the reverse rotation is prevented, there is an advantage that the lock becomes reliable. Further, since the load applied to each ratchet tooth 30, 31 is small, the ratchet tooth 30,
There is also the advantage that damage to 31 is prevented. And one
Since the load applied to the teeth is small, it is possible to design the ratchet teeth 30 and 31 to have small ridges, and the device itself can be downsized.

In the tightening device 7, the plurality of first ratchet teeth 30 are circumferentially arranged, and the second ratchet teeth 31 are also circumferentially arranged in the same number as the first ratchet teeth 30. The first ratchet teeth are arranged in a plurality of circles, and the second ratchet teeth are engaged with the second ratchet teeth.
The ratchet teeth may be provided with only one tooth or only a few teeth. Further, in this case, the first ratchet teeth arranged circumferentially may be provided on the take-up reel 29 side,
It may be provided on the housing case 28 side.

Further, in the tightening device 7, the number of teeth of each ratchet tooth 30 and 31 is twelve, but it is not limited to this, and the number of teeth of each ratchet tooth 30 and 31 should be increased. You can also By doing so, it becomes possible to wind the take-up reel 29 in small increments and to finely adjust the take-up amount of the drawstring 6.

The take-up reel 29 is made of aluminum, but is not limited to this, and various types such as stainless steel, high-strength plastic such as phenol resin, fiber dispersion reinforced plastic, and the like can be used. Further, although the winding case 28 is made of plastic, the winding case 28 is not limited to this and may be made of metal such as aluminum or stainless steel.

Further, in the above embodiment, an example in which the tightening device 7 of the present invention is applied to the case where the tire slip stopper 1 having a four-divided shape is mounted is shown. However, the present invention is not limited to this, and for example, tightening The string 6 is formed in a long shape, and its front end is fixed to the holding side 24 on the rear side of the housing case 28 to form a loop shape. With this loop-shaped tightening string, as shown in FIG. It may be applied to tighten the outer metal fitting 42b provided on the outer side of the tire slip stopper 40.

Further, in the above embodiment, the tightening device 7 of the present invention is a so-called net type anti-slip device in which the anti-slip portion 1a (see FIG. 15) wound around the tread portion of the tire is formed in a net shape. Although the example applied to mounting No. 1 is shown, the invention is not limited to this, and it can also be applied to mounting a so-called ladder-type tire anti-slip device in which the anti-slip portion is formed in a ladder shape. . Even in this case, the same operational effect can be obtained.

In the above embodiment, the tightening cord 6 is formed into a belt by braiding or weaving synthetic fiber multifilaments, but the material of the fibers is not particularly limited. Various materials such as nylon, polyester and polyethylene are used. When the drawstring 6 is formed into a double structure composed of a core yarn and a surface structure covering the core yarn,
The flexibility of the tightening string 6 itself is ensured, the elongation due to pulling is also prevented, the winding and releasing operations are facilitated, and the tire slip stopper attached is prevented from loosening. Further, as the tightening string 6,
It is also possible to use various materials such as metal wire rods and resin wire rods.

[0047]

As described above, according to the tightening device for a tire slip stopper according to claim 1 of the present invention, it is not necessary to provide a complicated reverse rotation preventing mechanism as in the conventional case, and the internal structure of the device is simple. become. Therefore, the number of parts is reduced, and the labor required for parts management and assembly is greatly reduced.
The cost will be reduced accordingly. Moreover, since the number of parts is small, the device itself can be downsized, and damage or failure is less likely to occur. Further, in this device, the operation of rotating the internal take-up reel from the outside of the storage case to wind the tightening cord can be performed by rotating the operating portion.
The operation of releasing the wound drawstring can also be performed by pressing the operation portion. As described above, since both the winding operation and the releasing operation can be performed by one operation section, the structure is further simplified, and the operation itself is also simplified.

Further, according to the tightening device for a tire slip stopper according to claim 2 of the present invention, each of the plurality of ratchet teeth arranged in a circular shape is provided even when a force is applied in the reverse direction. Since they are meshed with each other, the load applied to each ratchet tooth is small, and the ratchet teeth are less likely to be damaged. Moreover, since the load applied to each tooth is reduced, it is possible to design the ratchet teeth so that the peaks of the ratchet teeth are reduced, and the apparatus itself can be further downsized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a tightening device (hereinafter, referred to as a “tightening device”) for a tire slip stopper according to the present invention.

FIG. 2 is a cross-sectional view showing a take-up reel.

FIG. 3 is a cross-sectional view showing a state in which a drawstring is attached to a take-up reel.

FIG. 4 is a side view showing an assembly process of the tightening device.

FIG. 5 is a cross-sectional view showing an assembled state of the tightening device.

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

FIG. 7 is a cross-sectional view showing the operation of the tightening device.

FIG. 8 is a sectional view showing the operation of the tightening device.

FIG. 9 is a cross-sectional view showing the operation of the tightening device.

FIG. 10 is a perspective view showing a state in which the reverse rotation prevention of the tightening device is released.

FIG. 11 is a side view showing a state in which a tire slip stopper is mounted on a tire using the tightening device of the present invention.

FIG. 12 is a side view showing a state in which an elastic connecting member is attached to the tightening device.

FIG. 13 is a plan view showing a state in which an elastic connecting member is attached to the tightening device.

FIG. 14 is a side view showing a reinforcing plate.

FIG. 15 is a plan view showing a tire slip stopper.

FIG. 16 is a perspective view showing the tire slip stopper.

FIG. 17 is a side view showing a state in which the tightening device is attached to the tire slip stopper.

FIG. 18 is a perspective view showing a state in which the tightening device is attached to the tire slip stopper.

FIG. 19 is a side view showing a state where a tire slip stopper is attached to a tire using the tightening device of the present invention.

FIG. 20 is a side view showing a state in which a tightening string is wound around the tightening device.

FIG. 21 is a plan view showing a conventional non-slip device.

FIG. 22 is a perspective view showing a state in which the above-mentioned conventional slip prevention device is mounted on a tire.

FIG. 23 is a perspective view showing a state in which another conventional non-slip device is mounted on a tire.

FIG. 24 is an exploded perspective view showing a tightening device used in the slip prevention device of another conventional example.

FIG. 25 is a perspective view showing an operation of the tightening device.

FIG. 26 is an explanatory view showing the operation of the tightening device.

[Explanation of symbols]

 18 Operation Protrusion 28 Storage Case 29 Take-up Reel 29a Take-up Shafts 29b, 29c Flange 30 First Ratchet Teeth 31 Second Ratchet Teeth 32 Spring 34 Operation Protrusion Exposure Hole

Claims (2)

[Claims] 1. A tightening device for a tire slip stopper, comprising winding a tightening cord when the tire slip stopper is attached to a tire to tighten the tire slip stopper, wherein flanges are formed at both ends of the shaft. A take-up reel for winding the drawstring and a housing case for rotatably housing the take-up reel, and the outer surface of one flange of the take-up reel or the inner surface of the housing case facing the outer surface. A plurality of first ratchet teeth, which are formed so as to idle in the winding direction and mesh with each other in the reverse direction, are circumferentially disposed on one of the surfaces, and the first ratchet teeth are formed on the other surface. Second ratchet teeth that mesh with each other are formed, and both ratchet teeth on the outer side surface of the flange and the inner side surface of the storage case are constantly pressed against each other in the housing case to engage with each other. The ratchet tooth forming surface of the flange is pressed against the biasing force of the biasing member to release the meshing of both ratchet teeth, and the winding reel is rotated by rotation. A tightening device for a tire anti-skid device, characterized in that an operating portion is formed, and an end surface of the operating portion is exposed to the outside of the case through an exposure hole formed in the housing case. 2. The tightening of a tire slip stopper according to claim 1, wherein a plurality of second ratchet teeth are circumferentially arranged, and the second ratchet teeth engage with each of the first ratchet teeth. apparatus.