JPS63101105A - Tire nonskid device - Google Patents

Abstract

PURPOSE:To improve fitting operability and nonskid performance by providing multiple radial arms on a boss section formed into a discontinuous annular body expandable to be fitted to a wheel and bending the tip of each arm from the middle so as to cover the tire outer periphery. CONSTITUTION:The attachment 30 of a fitting device 28 is pushed into the inner periphery of the rim section 64 of a wheel 60 and fitted to the wheel 60. Next, the boss section 18 of a device main body 16 is coupled with the attachment 30, with the rectangular ring 84 and hook section 82 of a buckle 88 disengaged. In this case, two arm sections 20 pinching a disengaging section 80 are located so as to pinch the tire grounding section. Then, an end ring 36 is fitted and fixed by leveling a lever 54. After a wheel 58 is slightly rotated and the position of the arm section 20 is correctly adjusted, a buckle 88 is connected. Thereby, the arm section 20 is located so as to cover the tire outer periphery and exerts the nonskid function. According to this constitution, fitting is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire slip prevention device, and more specifically, the present invention relates to a tire slip prevention device, and more specifically, it includes an arm portion that extends radially from a boss portion and is curved in the middle, and the boss portion is attached to a wheel. The present invention relates to a tire slip prevention device of a type in which the tip of the arm portion is arranged to cover the outer circumferential portion of the tire by being attached to the tire.

[Prior Art] As this type of device, those proposed in Japanese Patent Application Laid-open Nos. 57-172805 and 60-56609 are known.

In the device proposed above, as shown in FIG. 10, arms 14 are radially attached to a boss 12 in which a through hole 10 is formed through pins 11 at equal intervals. The arm 14 is swingable in the circumferential direction of the boss 12 as shown by an arrow E using the pin 11 as a fulcrum.

In this device, by swinging two adjacent arms 14, which are adjacent to each other across the tire's ground contact area, in a direction away from each other using the pin 11 as a fulcrum, it is possible to attach the arms to the tire without jacking up the vehicle. It has the advantage of being easy to install and operate.

However, this has the disadvantage that when traction is applied to the tire during climbing, etc., the arm swings so that the ground contact part escapes, resulting in a decrease in anti-slip performance.

[Problems to be Solved by the Invention] In view of the above, an object of the present invention is to provide a tire anti-slip device that can improve anti-slip performance without reducing mounting operability.

[Means for Solving the Problems] In the tire slip prevention device according to the present invention, the annular body in which the through hole is formed extends in the radial direction from the boss part and is curved in the middle so that the tip part covers the outer circumferential part of the tire. In a tire slip prevention device including a plurality of arm parts, the arm part cannot swing in the circumferential direction with respect to the boss part, and the boss part is a discontinuous annular body whose discontinuous part can be expanded. The structure is as follows.

[Function] In the present invention having the above configuration, the arm portion is not swung relative to the boss portion, so even if the tire is subjected to special pitching traction, the arm portion is prevented from moving so that the tIc ground portion can escape. .

The mounting operation on the tire is performed by expanding the discontinuous portion of the boss portion and separating two adjacent arm portions from each other with the ground contact portion of the tire in between.

[Embodiment] FIGS. 1 to 4 show a first embodiment of a tire anti-slip device according to the present invention.

As shown in FIGS. 1 and 2, the main body 16 of the apparatus is integrally provided with a boss portion 18 and an arm portion 20 of eight pieces. The device main body 16 is integrally molded from elastic plastic such as polyurethane, nylon, polyester, or polypropylene. A through hole 22 is formed in the center of the boss portion 18, and the arm portions 20 protrude radially from the periphery of the boss portion 18 at equal intervals. The arm portion 20 has a bent intermediate portion and a free end portion extending in the axial direction of the boss portion 18 . A spike pin 24 is provided on the outer peripheral surface of the free end of the arm portion 20.
is buried with its tip protruding, and a protrusion 26 is integrally formed on the inner peripheral surface.

The boss portion 18 has two arm portions 2 adjacent to each other.
A cutout portion 80 extending in the radial direction is formed at a central position of 0. Thereby, the boss portion 18 is made into a discontinuous annular body. A bracket 82 is fixed to one side of the boss portion 18 with a separation portion 80 in between, and a lever 86 having a square ring 84 is pivotally supported on the other side, and these constitute a buckle 88. are doing.

As shown in detail in FIG. 3, the buckle 88 is configured such that the lever 86 is tilted in the direction of arrow A after the rectangular ring 84 pivotally supported at the intermediate portion of the lever 86 is hooked onto the hook portion 82A of the bracket 82. The end portions of the boss portions 18 facing each other with the separation portion 80 in between are connected inseparably.

As shown in FIGS. 1 and 2, the attachment device i28 for attaching the device body 16 to the wheel includes an attachment 30 made of a cylindrical steel plate, and a spring plate 34 fixed to the attachment 30. , and an end ring 36 which is a removal preventing member that is removably attached to the attachment 30. As shown in FIG. 2, the attachment 30 is bent many times to form an annular protrusion 38 at one end in the axial direction and an annular recess 40 at the middle.

The diameter of the annular convex portion 38 is smaller than that of the through hole 22 of the boss portion 20.

The spring plate 34 is made of spring steel and is bent as shown in FIG. 4, with a locking pawl 42 formed at one end, a guide pawl 44 cut and raised in the middle, and the other end formed with the above-mentioned locking pawl 42. It is fitted into the annular recess 40 . Four spring plates 34 are arranged at equal intervals around the outer periphery of the attachment 30 and are fixed via rivets 46.

The end ring 36 has a substantially U-shaped cross section corresponding to the annular convex portion 38 and a partially spaced discontinuous ring portion 48, and a flange portion 50 bent from the ring portion 48. A buckle 52 is provided to connect both ends of the portion 48. The buckle 52 includes a lever 54 pivotally supported at one end of the ring portion 48 and a lever 54 that is pivotally supported at one end of the ring portion 48.
A link plate 56 is pivotally supported at the other end, and the end of the link plate 56 is pivotally supported by the intermediate portion of the lever 54.

When the lever 54 of the buckle 52 is pushed down in the direction of arrow B, the buckle 52 pulls both ends of the ring portion 48 together with an increased tensile force, thereby reducing the diameter of the end ring 36. Since the outer periphery of the flange portion 50 is cut out at regular intervals, the diameter reduction operation is not hindered. When the end ring 36 is reduced in diameter, the diameter of the ring portion 48 is that of the annular convex portion 38. It will be slightly smaller than . In addition, when the ring portion 48 is wound around the annular convex portion 38 and attached to the attachment 30, the end ring 36 is immovably restrained by its own elastic force. Further, the outer diameter of the flange portion 50 in this state is sufficiently larger than that of the through hole 22 of the boss portion 20.

As shown in FIG. 2, the wheel 58 to which the tire slip prevention device configured as described above is mounted is a wheel 60.
and a tire 62 attached to a wheel 60. The wheel 60 includes a rim portion 64 on which a tire 62 is fitted, and a disk portion 66 welded to the rim portion 64. The rim portion 64 has annular groove portions 88 and 70 formed at the end portions of the ear portions and at the mid-bend portions, respectively.

Note that the device main body 16 is arranged such that the distance between the inner circumferential surface of the free end side of the arm portion 20 and the axis of the boss portion 18 is equal to the axis of the tread portion and the disk portion 66 on the non-contact surface of the tire 62. It is set almost the same as that of . Also,
The dimensions of the mounting device 28 are also set in relation to the rim portion 64, such as the outer circumferential diameters DI, D2 (see FIG. 4) of the locking pawl 42 and the guide pawl 44 formed on the spring plate 34.

The attachment/detachment procedure and operation of this embodiment will be explained below.

First, the installation procedure will be explained. When installing the tire anti-slip device, the attachment 30 of the mounting device 28 is first attached to the wheel 60. This attachment is completed by simply pushing the attachment 30 into the inner circumference of the rim portion 64.

That is, the attachment 30 is moved toward the back with the locking pawl 42 of the spring plate 34 being elastically deformed in the diametrical direction by the pushing operation, and the locking pawl 42 is moved into the annular groove 7.
When it drops to 0, no further movement is possible.

Also, in this state, the guide claw 4 of the spring plate 34
4 is elastically abutted against the annular groove portion 68. Thereby, the attachment 30 is securely fixed to the wheel 60.

Next, the device main body 16 is attached to the attachment 30. This attachment is performed by aligning the through hole 22 of the boss portion 18 with the attachment 30 while the rectangular ring 84 of the buckle 88 and the hook portion 82A are disengaged.
This is done by fitting the boss portion 18 into the seven-touch member 30. At this time, since the tire 62 is crushed by the weight of the vehicle and is in contact with the ground over a wide area, if two of the eight wooden arm portions 20 are adjacent to each other, the free end side ends of the tire 62. Therefore, the two arm parts 20 adjacent to each other with the separation part 80 in between are arranged opposite to the attachment 30 so as to sandwich the ground contact part of the tire 62 between them. be done. When the two arm portions 20 are pressed in a direction away from each other, the boss portion 18 is elastically deformed, the separation portion 80 is expanded, and the two arm portions 20 are pushed apart in a direction away from each other. When the boss portion 1-8 is fitted into the attachment 30 in this state, the two arm portions 20 are placed on the tread portion at a position offset from a predetermined position in the circumferential direction.

Next, the end ring 36 is attached to the attachment 30. In this installation, the flange portion 50 side is attached to the boss portion 2.
0, and without tilting the lever 54, press the ring part 4.
This is done by twisting the lever 54 after winding the 8 to 7 tachmen around the annular convex portion 38 of the 30. Thereby, the end ring 36 is securely fixed to the attachment 30.

After this, when the vehicle is moved slightly and the wheels 58 are rotated 1/2 to 1/4, the two arm portions 20 will be adjacent to each other without sandwiching the ground contact portion of the tire 62 between them. The portion 18 has been restored to its original shape.

Next, the square ring 84 of the buckle 88 is attached to the hook portion 82.
A and when the lever 86 is pushed down, the boss part 18 is separated from the separation part 8.
All operations are completed at 0 or more, where the ends are connected with the 0 gap further narrowed. In this state, the boss part 18 is at least 7 tach wide in the radial direction from the diameter of the through hole 22 to the part where the boss part 18 is fitted.
It is possible to freely move by a dimensional distance obtained by subtracting the outer diameter dimension of 30.

Next, the effect will be explained. When the wheel 58 is rotated by the vehicle running, the arm part 20 has a large frictional force with the tire 62 because the protrusion 26 is formed on the free end side, and is rotated together with the wheel 58. . ! The bent arm part 20 is elastically bent in order to absorb the tire 62 being crushed and reduced in diameter by the weight of the vehicle, and at the same time the boss part 18 is bent radially inward. will be moved towards. Therefore, the device main body 16 moves elliptically around the axle while the vehicle is running. Since the arm part 20 is provided with a spike pin 24 at the ground contact part, the grip force is increased especially during starting, braking, and turning, and the tire 62 exhibits a running performance similar to that of a spiked tire.

Furthermore, even if the tire 62 is subjected to traction when climbing a hill, the arm section 20 is integrated with the boss section 18 and will not be swung relative to the boss section 18, so the traversing performance is reduced. There's no need to put it away.

When the vehicle turns, a side force acts, and this force moves the boss portion 18 in the axial direction, causing the attachment 3 to move.
Although an attempt is made to pull out from 0, the boss portion 18 comes into contact with the flange portion 50 of the end ring 36 and is prevented from being pulled out.

Next, the procedure for removing the attachment will be explained. When removing the tire slip prevention device, normally only the device main body 16 and the end ring 36 are removed.

To remove the attachment of the device main body 16, the end ring 36 is first pulled up by the lever 54, and the ring portion 48 is expanded in diameter and removed from the attachment 30. On this occasion,
If all the arm parts 20 are not grounded, the main body 16 of the device may remain as it is, or the rectangular ring 8 of the buckle 88 may
4 is disengaged from the hook portion 82A, and then pulled out from the attachment 30, completing the release of attachment. Further, when some of the arm sections 20 are grounded, the attachment is released by following the procedure in reverse of the attachment operation.

Since the attachment 30 does not affect the running of the vehicle even if it is left attached, it can be left attached regardless of whether or not an anti-slip device is needed during snowy periods5.For example, the attachment 30 can be left attached regardless of whether or not a tire slip prevention device is required. All that is required is the operation of attaching the ring 36.

When removing the attachment (30), it can be easily done by simply pulling it out.

As described above, in this embodiment, the tire slip prevention device as a whole is elastically attached to the wheel 60, and the device main body 16 is capable of elliptical movement with respect to the axle.
The input is distributed over a wide area, so no unreasonable force is applied to each part, resulting in high durability.

Furthermore, in this embodiment, the boss portion 18 and arm portion 20 of the device body 16 are integrally molded, so the number of parts is small, the number of assembly steps is reduced, and the manufacturing cost is also reduced.

Furthermore, since the device main body 16 has a simple structure and does not have any moving parts, its durability is significantly improved.

Note that the spacing between the ground contact parts of the arm parts 20 that are adjacent to each other is usually set to about 80% of the tire ground contact length, so by expanding the separation part 80, the spacing can be increased from 50 to 50%.
It is sufficient if it is increased by about 60 mm.

FIG. 5 shows another embodiment of a buckle 88 that is attached to the boss portion 18 of the device body 16. In this embodiment, a square ring 84 is pivotally supported by a bracket 82, and a buckle 88 is attached to a lever 86. The hook can be locked in the hooking recess 86A. Since a plurality of latching recesses 86A are provided, the latching position can be selected as required.

The buckle shown in FIG. 5 can also be applied as a buckle attached to end ring 36, and buckle 88.
52 can be applied with various other types of buckles.

In addition, to connect the separation portion 80, as shown in FIG. 9, pins 112 are implanted on the outer periphery of both ends of the boss portion 18, and the bottles 112 are connected to each other using a rubber-made wire as shown in FIG. 9A. It is also conceivable to connect them with a ring 114.

Figure 6 shows 'IIc! ! A second embodiment of the body 16 is shown. This embodiment differs from the first embodiment as follows:
A rubber plate 90 on which a spike pin 24 is driven into the grounding part of the arm part 20 is adhered with baking sulfur, and a connector 92 equipped with a ratchet mechanism is provided in place of the buckle 88. .

The grounding portion of the arm portion 20 is required to have excellent wear resistance and bending resistance. As a material having such characteristics, urethane-based materials such as polyurethane as described above can be used, but urethane-based materials have the disadvantage of being high in cost. Therefore, if the rubber plate 90 is bonded to the grounding part as in this embodiment, the other parts of the device main body 16 can be made of inexpensive and lightweight thermosetting resin such as FRP, thermoplastic rubber, polyethylene, etc. Since thermoplastic elastomer can be applied, it is advantageous in terms of cost.

Furthermore, by using the rubber plate 90, the characteristics of rubber are utilized, abrasion resistance is improved, durability is improved, the coefficient of friction is increased, braking and traction performance is improved, and noise is reduced. Ru.

Connector 92 is of continuous type 9, as shown in detail in FIG.
A compression coil spring 100 is formed with a belt 96 made of nylon or the like having a ring 4 formed thereon, and a claw 98 that engages with the continuous mold 94.
The socket 104 includes a lever 102 which is biased in the direction of arrow C and a socket 104 which is pivotally supported. The belt 96 and the socket 104 are respectively fixed to both ends of the boss part 18 with the separation part 80 in between.

In the case of this embodiment, unlike the previous embodiment, when the belt 96 is engaged with the socket 104 while the two arm portions 20 are being pushed apart, the mounting operation is completed. That is, since the belt 96 is relatively free to move in the direction indicated by the arrow, the gap between the separation parts 80 is narrowed by the restoring force of the boss part 18 immediately after the vehicle starts running, and the gap between the separation parts 80 is automatically narrowed. The lever 10 is then relatively moved in the above direction.
This is because unless 2 is operated, movement in the opposite direction is blocked.

It is more preferable that the free end of the belt 96 be biased in the direction of the arrow by a biasing means such as a tension coil spring or a rubber band.

In addition, if the belt 96 is made long enough, the belt 96 and the socket 104 can be kept in an engaged state at all times, eliminating the need to engage the belt 96 and the socket 104, further improving operability. be done.

FIG. 8 shows a third embodiment of the device main body 16.

In this embodiment, the boss portion 18 has a two-part structure consisting of a portion 18A and a portion 18B, and one end portions of the two portions are rotatably supported via a pin 106. Further, one part 18A and one part 18B are provided with tension coil springs 10B.
The boss portion 18 is biased in the direction of diameter reduction.

In this embodiment, the device body 16 is a tension coil spring 108
The boss portion 18 is mounted with its diameter expanded as shown by the imaginary line against the urging force of. Although it is not necessary to provide the buckle 88, the connector 92, etc. in this device main body 16, these may also be provided.Also, the tension coil spring 108 may be omitted and the buckle 88, the connector 92, etc. may be provided. good.

Further, in this embodiment, the arm portion 20 has a separate grounding portion 20A, and this grounding portion 20A is fixed via a bed 11O. As a result, only the grounding portion 20A can be made of an expensive urethane material, and the other parts of the device body 16 can be made of a low-cost material.
Overall cost reduction is achievable.

It goes without saying that the unique configurations of each of the embodiments described above can be used in combination with the configurations of other embodiments as appropriate.

[Effects of the Invention] As explained above, the tire anti-slip device according to the present invention has the effect that the anti-slip performance can be improved without reducing the mounting operability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the tire slip prevention device according to the present invention, FIG. 2 is a cross-sectional view showing the first embodiment mounted on a tire, and FIG. 3 is a Fig. 4 is a perspective view of the spring plate shown in Fig. 2 seen from the opposite direction, Fig. 5 is a side view showing another embodiment of the buckle, and Fig. 6 is a view of the main body of the device. FIG. 7 is a perspective view showing the second embodiment, FIG. 7 is a view taken along the line ■-■ in FIG. 6, FIG. 8 is a front view showing the third embodiment of the device body, and FIG. FIG. 3 is a perspective view of the main body of the anti-slip device. 16... Apparatus body, 18... Boss part, 20... Arm part, 62--- Tire, 80... Separation part. 88...sha buckle. 9211...Connector. 108・kai◆Tension coil spring.

Claims (1)

[Claims] (1) In a tire slip prevention device comprising a plurality of arm parts that extend radially from a boss part of an annular body in which a through hole is formed and are curved in the middle, the tip part covers the outer circumferential part of the tire. A tire skid prevention device, characterized in that the boss portion cannot swing in the circumferential direction with respect to the boss portion, and the boss portion is a discontinuous annular body whose discontinuous portion can be expanded.