JPH0510243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an anti-slip device for tires used when driving on snowy or frozen roads.

[Prior art]

Tire chains, which have traditionally been known as this type of anti-slip device, are not only uncomfortable to ride because the part that contacts the road surface is made of steel.
The problem is that they are heavy and bulky, and require a lot of effort to put on and take off.

Therefore, as an alternative to this tire chain, for example, as seen in Japanese Patent Application Laid-Open No. 61-54307, a plurality of anti-slip pieces that are placed over the tire are made of a flexible synthetic resin material. So-called non-metallic anti-slip devices have been developed.

In this prior art anti-slip device, the individual anti-slip pieces are formed in a net shape with a constant length in the circumferential direction of the tire, so that the anti-slip pieces are attached to the inner edge along the inner surface of the tire. By providing a shorting piece that is shorter than the entire length of this inner edge, and caulking this shorting piece and the inner edge at multiple locations with metal fittings, the anti-slip piece is forced to curve along the curvature of the tire. Improves the adhesion between the anti-slip piece and the tire.

[Problem that the invention seeks to solve]

However, according to this configuration, a large number of metal fittings are required to curve the anti-slip piece, which increases the number of parts and the number of assembly steps, leading to an increase in cost.

Moreover, this anti-slip piece has multiple caulking points in the circumferential direction of the tire, forcing the entire piece to curve, so when it is installed on the tire,
It was difficult for the anti-slip piece itself to form a natural radius, making it difficult to completely attach it to the tire without any gaps. Therefore, while the vehicle is running, the gap between the tire and the anti-skid piece widens due to centrifugal force, causing problems such as the anti-skid piece becoming displaced.

At the same time, the curvature of the anti-skid piece is determined by the pitch between the caulked parts, so in order to adapt it to tires of various diameters, the length of the shorting piece must be adjusted by changing the mold for each tire size. Special anti-slip pieces with different sizes had to be remolded, and changes in tire size could not be easily accommodated.

[Means for solving problems]

Therefore, in the present invention, in a tire slip prevention device in which a plurality of tread members made of flexible synthetic resin are sequentially connected in the circumferential direction of the tire, the tread member has a center point extending in the width direction of the tire. A pair of ladder parts are provided at a distance from each other on both sides of the line an outer side rope part integrally molded with the rudder part and extending in the circumferential direction of the tire by connecting the outer ends of the rudder parts; and a pair of inner side rope portions each extending in the circumferential direction of the tire and having opposing ends separated from each other in the circumferential direction of the tire, and connecting the longitudinal intermediate portions of the pair of rudder portions to each other, and a straight section extending in the circumferential direction and integrally molded with the ladder section; and a straight section connecting each end of the pair of ladder sections and a longitudinally intermediate section of the straight section, and integrally molded with the ladder section and the straight section. and a locking device that connects the opposite ends of the inner side rope part to each other when the opposite ends of the inner side rope part are pulled in a direction toward each other. It is characterized by what it did.

[Effect]

With this configuration, the rudder effectively grips the road surface against the longitudinal traction that occurs when starting or braking the vehicle, so it is possible to obtain a gripping force comparable to that of a ladder-type anti-slip device. In order to prevent skidding, the diagonal line part and the straight part, which are integrally formed with the taddle part, grip the road surface, so it can exert a reliable anti-slip effect against skidding in the same way as the net type anti-skid device. can. Also, since the separated end of the tread member is pulled toward the longitudinal center of the tread member, the inner peripheral edge of the tread member itself is flexible and close to the end of the ladder portion. Coupled with the fact that the straight portion and the straight portion are connected by the diagonal line portion, the curve deforms uniformly over the entire length with a very natural curvature. Therefore, when the tread members are attached to the tire, each tread member fits smoothly along the curvature of the tire and fits extremely well to the tire without any gaps.

Moreover, since only one metal fitting is required for each tread member to curve the tread member, the number of parts and assembly man-hours can be significantly reduced, making it easier to assemble the device. Therefore, costs can be reduced.

At the same time, if you change the length of the locking tool,
It becomes possible to set the curvature of the tread member in various ways according to the tire diameter, and there is no need to create a new mold and remanufacture the tread member for each tire size as in the past. Therefore, a common tread member can be used for many tire sizes by providing several types of locking tools with different lengths.

〔Example〕

The first embodiment of the present invention will be described below with reference to FIGS. 1 to 5.
This will be explained based on the diagram.

In FIG. 4, a tread member 2 that covers the outer peripheral surface of the tire 1 is molded from a synthetic resin material such as urethane elastomer.
Each is provided. The tread member 2 of this embodiment includes a mesh portion 4 exhibiting a mesh-like tread pattern in which a plurality of meshes 3 are arranged independently, and a pair of ladder portions extending in the width direction of the tire 1 on both front and rear sides of the mesh portion 4. 5, and has a constant length in the circumferential direction of the tire 1. The ground plane 5a of the ladder part 5 is formed one step higher than the ground plane 4a of the mesh part 4, as shown in FIG. Projections 6 are protruded at intervals in the width direction of the tire 1, and a plurality of spike pins 7 are also protruded in consideration of driving on frozen roads.

In addition, in order to prevent skidding, the mesh part 4 includes a straight part 8 extending in the circumferential direction of the tire 1, and a straight part 8 extending obliquely to the straight part 8 to apparently connect both ends of the ladder part 5. A diagonal line portion 9 is provided, and a parallel portion 10 extending parallel to the ladder portion 5 to obtain driving force is provided. This parallel portion 10 is located on the center line X ₁ -X ₁ that crosses the tread member 2 in the width direction of the tire 1, and the spike pin 7 is also protruded from this parallel portion 10.

In addition, as shown in FIG. 2, the back surface of the tread member 2, that is, the contact surface with the tire 1,
A large number of protrusions 11 are provided to prevent the wheels from idling.

A ladder portion 5 is provided on the left and right edges of the tread member 2.
A pair of outer tongue portions 12, 12 extending to the outside of the tire 1 and inner tongue portions 13, 13 extending to the inside of the tire 1 are integrally provided on both left and right sides of the tire 1, respectively. The outer edge portions of the outer tongue portions 12, 12 are integrally connected in the circumferential direction of the tire 1, and form an outer side rope portion 14 along the outer surface 1a of the tire 1.
C-shaped hooks for hooking the tightening band 17 are provided in the attachment holes 15 provided at three locations at both ends of the outer side rope portion 14 and at the intersection with the center line _X1 - _X1 . 16 is inserted and held.

In this case, the hook 16 may be hooked onto the intermediate portion 14a of the outer side rope portion 14 as shown by the broken line in FIG. In the case where the rope is passed through the outer side rope portion 14, the intermediate portion 14a of the outer side rope portion 14 may be omitted.

On the other hand, the inner edge portions of the inner tongue portions 13, 13 form an inner side rope portion 19 along the inner surface 1b of the tire 1, and this inner side rope portion 19 is located along the center line _X1 - _X1 . On both sides, they are spaced apart and opposed to each other in the circumferential direction of the tire 1. Therefore, the inner peripheral surface 1 of the tire 1 in the tread member 2
The inner edge along line b is separated in the circumferential direction of the tire 1 with the center line X _{1 -} , a locking hole 22 is opened in each of the locking holes 22 as shown in FIGS. 3 and 4.
As shown in the figure, for example, a C-shaped locking tool 2
Both ends of 1 are hooked. This locking tool 21
The total length L ₁ is the separation distance of the inner side rope part 19
It is formed smaller than L ₂ , and this locking tool 2
1 between the opposing ends 20, the inner tongue portions 13, 13 are pulled toward each other toward the center line _X1 - _X1 , and the tread member 2 is pulled toward the center line _X1 -X1. It is bent into an arc shape with ₁ as the bending center.

In the case of this embodiment, the outer tongue portion 12,
12 and the front and rear edges of the inner tongue portions 13, 13 are inclined in a direction that separates from each other as they advance toward the protrusion tip side, and extend outward at a constant inclination angle θ with respect to the ladder portion 5, and Further, the inner tongue portions 13, 13 are formed into a substantially triangular shape in plan view, which is advantageous in terms of strength.

outer tongue pieces 12, 12 and inner tongue pieces 13,
A connecting hole 23 is opened at both ends of the connecting hole 23, and a C-shaped connecting tool 24 is inserted into the connecting hole 23.
The seven tread members 2 are connected in a band shape by passing the ends of the tread members 2 through each other. A ring portion 26 is provided in the connecting hole 23 of the tread member 2 at the starting end and the ending end of the tread member 2.
This ring portion 26 is provided with a detachable hook portion 27, and by engaging these ring portions 26 and hook portions 27, the tread member 2 continuous in a band shape is extended along the outer circumference of the tire 1. It is continuous in an endless manner.

In order to attach the anti-slip device configured as described above to the tire 1, first, the entire device is developed into a band shape, which is placed over the top of the tire 1, and then wrapped around the outer peripheral surface of the tire 1 one after another. The inner side rope portion 19 is placed along the inner side surface 1b of the tire 1, and the outer side rope portion 14 is placed along the outer side surface 1a of the tire 1. Then, the tightening band 17 is hooked onto the hook 16 of this outer side rope portion 14 in a diagonal manner to temporarily fix the device to the tire 1.

Next, the tire 1 is rotated half a turn, and the ring portions 26 and hook portions 27 of the tread members 2 at both ends are hooked, and the plurality of tread members 2 are placed over the entire circumference of the tire 1.

Finally, hook the tightening band 17 onto all the hooks 16, pull the outer tongue portions 12, 12 of each tread member 2 toward the rotation center of the tire 1, and tighten the inner side rope portion 19 of the tire 1. While being locked to the inner surface 1b, the tread member 2
is brought into close contact with the outer peripheral surface of the tire 1, thereby completing the attachment to the tire 1.

According to the first embodiment of the present invention, the inner side rope portion 19 of the tread member 2 is separated in the circumferential direction of the tire 1 with the center line X ₁ -X ₁ extending in the width direction of the tire 1 as a boundary. However, since the opposing ends 20, which are separated ends, are pulled in the direction toward each other by the locking tool 21, the tread member 2 itself has flexibility, and the center line X ₁ It curves evenly over the entire length with a very natural curvature centering on −X ₁ .

Therefore, when the tread members 2 are attached to the tire 1, each tread member 2 fits comfortably along the curvature of the outer circumferential surface of the tire 1, and is extremely well adapted to the outer circumferential surface of the tire 1. In particular, the tread member 2 of this embodiment is divided into many parts along the circumferential direction of the tire 1, and the contact area of each tread member 2 with the tire 1 is relatively small.
The ladder portion 5 of each tread member 2 has a diagonal line portion 9 extending obliquely with respect to the circumferential direction of the tire 1.
Since the ladder parts 5 and 5 are connected by the diagonal line part 9, the slack of the ladder parts 5, 5 is absorbed by the hatched part 9.

Therefore, the tread member 2 reliably adheres to the outer circumferential surface of the tire 1 without any gaps, and is prevented from slipping during driving, thereby making it possible to fully exhibit skid prevention performance and driving performance.

Moreover, since the tread member 2 is naturally curved by connecting the inner side rope portions 19 with the single locking tool 21, only one metal fitting is required for each tread member 2 for bending. Therefore, the number of parts and assembly man-hours can be significantly reduced, making it possible to reduce costs. Furthermore, since the number of holes to be made in the inner side rope portion 19 is also reduced, it is advantageous in terms of the strength of the tread member 2.

In addition, by changing the length of the locking tool 21 and adjusting the amount of tension of the inner side rope portion 19 in the direction of the center line _X1 - _X1 , the curvature of the tread member 2 can be changed. It is possible to deal with variations in tire diameter with a simple configuration that requires only replacing the locking tool 21. Therefore, there is no need to create a new mold for each tire size and re-mould the tread member 2, and the common tread member 2 can be adapted to many tire sizes, reducing costs.
Can be provided at low cost.

Further, in the above embodiment, when the tread member 2 is tightened with the tightening band 17, the outer tongue portions 12, 12 are engaged with the outer surface 1a of the tire 1, and the outer tongue portions 12 are also engaged with the inner surface 1b of the tire 1. Since the inner tongue pieces 13, 13 are led out to the outside at a constant angle of inclination θ with respect to the ladder portion 5, the ladder portions 5 at both front and rear ends of the tread member 2 are
This means that a force that tries to pull the tire 1 toward the outside along the circumferential direction is applied.

Therefore, this force that tries to pull outward is
Since it resists the force that tries to peel off the ladder part 5 from the tire 1 during braking, it is possible to suppress the turning up of the ladder part 5 to a small extent, and there is an advantage that damage and harmful deformation of the tread member 2 can be prevented.

In addition, in the first embodiment described above, the inner tongue piece portion 1
3 and 13 are formed in a triangular shape, the present invention is not limited to this. For example, as in the second embodiment of the present invention shown in FIG. It is also possible to have a shape that extends outward in a substantially T-shape without being attached.

〔Effect of the invention〕

According to the present invention described in detail above, it is possible to exhibit large driving force and braking force and excellent skid prevention performance even on slippery road surfaces, and it is also possible to fold it compactly when not in use. And since the tread member is curved with a very natural curvature,
It fits the tire extremely well and can be securely attached to the tire without any gaps.

Moreover, since only one metal fitting is required for each tread member to curve the tread member, assembly is easy and the curvature of the tread member can be easily adjusted by simply changing the length of the locking tool. can be freely set according to the tire outer diameter,
Since a common tread member can be used for many tire sizes, the cost is low and there is an advantage that it can be provided at a low price.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a plan view of the tread member, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a non-slip device. Figure 4 is a side view of the tire mounted on the tire as seen from the inside of the tire, Figure 4 is a perspective view of the same, Figure 5 is
The figure is a side view of the anti-slip device mounted on the tire, seen from the outside of the tire, and FIG. 6 is a plan view showing a second embodiment of the present invention. 1... Tire, 1b... Inner surface, 2, 41...
Tread member, 19...inner edge (inner side rope part), 20... separation end (opposite end), 21...
...locking device.

Claims (1)

[Scope of Claims] 1. A tire slip prevention device in which a plurality of tread members 2 made of flexible synthetic resin are sequentially connected in the circumferential direction of the tire, wherein the tread members 2 are arranged in the width direction of the tire. A pair of ladder parts 5, 5, which are provided at a distance from each other on both sides of the extending center line X1, have a raised ground plane 5a, and have a protrusion 6 for gripping the road surface on the ground plane 5a; an outer side rope portion 14 that is integrally molded with the ladder portions 5, 5 at the outer end portions along the outer surfaces of the tires 5, 5, and extends in the circumferential direction of the tire by connecting the outer end portions of the ladder portions 5, 5; The ladder parts 5, 5 are integrally molded with the ladder parts 5, 5 at their inner end parts along the inner surface of the tire, and each extends in the circumferential direction of the tire, and mutually opposing ends 20, 20 are spaced apart in the circumferential direction of the tire. A straight line that connects the pair of inner side rope portions 19, 19 and the intermediate portions in the longitudinal direction of the pair of ladder portions 5, 5 to each other, extends in the circumferential direction of the tire, and is integrally formed with the ladder portions 5, 5. Part 8
and connects each end of the pair of ladder parts 5, 5 and the longitudinal middle part of the straight part 8, and is integrally molded with the ladder parts 5, 5 and the straight part 8. The opposite ends 20, 20 are pulled together in a state in which the diagonal line parts 9, 9 whose sides near the ends extend in a direction away from each other, and the opposite ends 20, 20 of the inner side rope parts 19, 19 are pulled in a direction toward each other. A tire slip prevention device characterized by comprising: a connecting locking tool 21;