JPH11227431A - Antislipping net for tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively suppress the floating and fluctuation in a peripheral direction of an opening part, even when the opening part for mounting a net is formed in large among divided net bodies. SOLUTION: This net is provided with (n) pieces of divided net bodies Ni arrayed with end parts faced, and a fastening band 7 joined by respective locking points 6 arrayed on the tire surface side of the respective divided net bodies Ni. A nearly fusiform opening part 21k is formed between the end parts of the divided bodies Ni. The band 7 has an auxiliary band part 31 for extendedly erecting the force point F j of one end side end member and the force point Gj+1 of another end side end member nipping an opening part 21k, at a large angle tilted in a peripheral direction than the tire center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-slip net for a tire which can effectively suppress the floating at a connecting portion.

[0002]

2. Description of the Related Art In recent years, as a tire anti-slip device for preventing slip on ice and snow road surfaces, for example, a non-slip net formed in a net shape using rubber, synthetic resin or the like has been used for road surface damage, noise, ride comfort and the like. In view of the above, they are frequently used instead of metal chains.

In general, as shown in FIG. 19, a plurality of (for example, two) net division bodies a1, a1
A net main part A wound around the tire tread and formed in a belt-like shape with its longitudinal ends connected to each other facing each other, and a fixed rope wound and joined in a chord shape at a support point j inside the net divided body a1. B, and a tightening band (not shown) that applies tension to the net main part A by being locked at a locking point (not shown) outside the net divided body a1.

[0004]

However, in such a non-slip net having a winding structure, when the anti-slip net is mounted on a tire, the difference between the perimeter on the center line side and the perimeter on the side edge side of the net divided body a1. As a result, at the connection portion J between the net divided bodies a1 and a1, there is a problem that a lift K from the tire is generated on the center line side, thereby causing noise and a decrease in grip force.

[0005] Japanese Patent Application Laid-Open No. 1-262208 discloses that
As shown in FIG. 20A, at both ends of the net segment a1,
The connecting bands d and d that are abutted with each other are integrally formed,
The connecting portion J is securely fixed by crossing and pulling the protruding portions d1 at both ends in the width direction of the connecting band d,
It has been proposed to suppress the lifting. Japanese Patent Application Laid-Open No. Hei 5-96917 discloses that, as shown in FIG.
Center portions in the width direction of both ends of the net divided body a1 are formed slightly inward from a straight line connecting the mounting holes e located at both ends in the width direction and formed with a vertical side f substantially parallel to the straight line. It has been proposed to increase the wrapping strength around the wire. However, in the former case, since the projecting portions d1 are crossed and fixed, it is difficult to perform a joint work on the rear side of the tire facing the vehicle body, and it is difficult to perform quick mounting. In the latter case, the effect of suppressing the floating is reduced. Insufficient.

In view of such circumstances, as a result of repeated studies, the present inventors have found that: a concave portion is provided at each end of the net divided body a1, and each connecting portion J
That the floating can be effectively suppressed by forming a substantially spindle-shaped opening in the vehicle body; and by enlarging one of the openings and using the enlarged opening, It has been found that a non-slip net can be attached to a tire while being in contact with the ground without jacking up or moving the tire back and forth.

However, when the circumferential length (opening length) of the opening is increased, the tightening of the opening becomes insufficient, the floating suppressing effect is impaired, and the net tends to fluctuate in the tire circumferential direction. Accordingly, when the length of the opening in the circumferential direction is large, it is necessary to provide a restraining means for increasing the restraint on the opening and suppressing the floating of the net and the fluctuation in the circumferential direction.

Therefore, according to the present invention, the points of force Fj and Gj + 1 are respectively applied to the end members on one end and the other end of the net divided body sandwiching the opening.
And the respective power points Fj, Gj + 1 are stretched at an angle inclined in the circumferential direction from the center of the tire using a tightening band. It is an object of the present invention to provide a tire anti-slip net that can effectively suppress the fluctuation of the tire.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a net having a structure in which one or more flexible n-pieces are arranged in the tire circumferential direction with one end and the other end in the longitudinal direction facing each other. A net divided body in which a main part is formed;
A fixed rope which is wound in a chord shape around the support points arranged inward toward the center of the vehicle body of the net division body and is fixed to the support point to connect the net division bodies and to be separable at the separation point; A non-slip net for a tire comprising a tightening band that applies tension to the net main portion by being locked at an outer locking point, wherein the net segment is formed at the one end and the other end. A net-shaped member is arranged between the arranged end members, and the end members of the net divided body facing each other by being circumferentially adjacent to each other have concave portions in which the facing edges are recessed on the center side of each net divided body. By doing so, a substantially spindle-shaped opening is formed between the opposing edges, and the support point is formed by each net segment Ni (i = 1 to
n) includes one end side end support point Pi of the one end side end member and the other end side end support point Qi of the other end side member, and the net segment includes one end sandwiching the opening. The end member on the side and the end member on the other end have a force point Fj on one end and a force point Gj + 1 on the other end, and the tightening band is connected to the force point Fj on one end and the force point on the other end. Gj + 1 is inclined in the circumferential direction from the center of the tire, and each of the net divided bodies Ni, Ni +
1 is characterized by having an auxiliary band portion which stretches 1 at an angle larger than 90 degrees.

In order to more reliably achieve the effect of suppressing the lifting of the opening and the effect of suppressing fluctuations in the circumferential direction, the length of the fixed rope when it is cut off at the cutting point at a load of 20 kg. The total length of the deployed rope is L0, and the one end side end supporting point Pi of the net divided body when the rope is developed in a plane.
And NL is the sum of the deployed lengths NPQi of the divided bodies, which is the deployed length between the other end support points Qi and NL, and the one end support points Pi and the other end support points of the fixed rope. Qi
When the sum ΣLPQi of the deployed lengths LPQi between the ropes PQ, which is the deployed length under a load of 20 kg, is TL, the auxiliary band portion includes the one-side force point Fj and the other-side force point G
j + 1 and the other power point H separating the length Ra on the circumferential center line satisfying the following equation (1) from the one end side power point Fj:
It is preferable that the other power point I is separated from the other end side power point Gj + 1 by a length Rb on the circumferential center line satisfying the following equation (2). (L0 × NL / TL) × 0.20 ≦ Ra ≦ (L0 × NL / TL) × 0.45 ... (1) (L0 × NL / TL) × 0.20 ≦ Rb ≦ (L0 × NL / TL) × 0.45 ... (2)

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a right side view (FIG. 1) of the anti-slip net 1 attached to the tire T as viewed from the inside, that is, the rear side of the tire (FIG. 1), and a left side view as viewed from the front side of the tire (FIG. 2). It is.

In the figure, a non-slip net 1 has one or more n divided nets Ni (i = 1 to n), and in this example, two (n = 2) divided nets Ni at one end in the longitudinal direction. E
1, a chord-like winding between each of the net main portions 3 having the other end portions E2 facing each other and arranged in the tire circumferential direction, and the support points 4 arranged inside each of the net segments Ni (on the rear side of the tire). 4 and a fixed rope 5 and each net segment Ni
And a fastening band 7 locked at a locking point 6 arranged on the outside (front side of the tire).

The net segment Ni is a flexible member made of a synthetic resin such as polyurethane, for example, and is disposed on the one end E1 and the other end E2 as shown in FIG. A net-like member 10 is provided integrally between the belt-like end members 9 extending in the width direction.

The net-shaped member 10 has a tread surface portion 10a for covering the tire tread, and non-ground side edges 10b and 10b outside the tread surface portion 10a. The tread surface portion 10a has no mesh structure in which a polygonal hole 11 such as a square or a hexagon or a circular hole 11 such as an ellipse is scattered, enhances grip on ice and snow roads, and has a width direction and a center line direction ( Stretchability in the tire circumferential direction). A spike pin (not shown) or the like is planted on the tread surface portion 10a as required. The side edge 10b has a zigzag outline formed by connecting triangular notches 12, and the support points 4 are provided at the protruding corners of the zigzag and at both ends in the width direction of the end member 9.
And a locking point 6.

The support points 4 and the lock points 6 are
In the unfolded state, they are arranged on a straight line parallel to the center line C of the net main part 3, respectively. In this example, the support points 4 and the locking points 6 are formed at symmetrical positions separated by the center line C. . Note that the support point 4 may be formed with a phase shift in the center line direction with respect to the locking point 6.

Here, the support point 4 is a net division body Ni
End end supporting point Pi formed on the end member 9A on one end side.
And the other end side end support point Q formed on the other end member 9B.
In this example, a plurality of net support points are also arranged between the support points Pi and Qi.

The circumferentially adjacent net divisions Ni, Ni +
Between the end members 9A and 9B facing each other, at least the back side of the tire is fixed at the fixing rope 5 and the support point 4 to form a single band-shaped net main part 3, and at this time, the net divided body Ni is a belt-shaped net main part 3
N1, N2... Nn from one end to the other end
In order. The belt-shaped net main part 3 is fixedly mounted on the tire T using a tightening band 7.

The fixed rope 5 is a low-stretch rope using organic fibers, metal fibers, or the like, and has connection portions 5a and 5b which can be divided from each other at separation points G at both ends. In this example, one connecting portion 5a is formed in an annular shape by folding the fixed rope 5, and the other connecting portion 5b is formed by a U-shaped hook fitting 15 which is detachable from the annular portion. This fixed rope 5 is fixedly connected to each of the support points 4 including the end support points Pi and Qi via a fixing metal member 16 such as a caulking member so as to prevent the positional deviation from occurring, and as shown in FIG. Point 4... Each net division body Ni is connected while being wound in a chord around the point.

In the present application, each net segment N
As shown in the enlarged view of FIG. 4, the end member 9 of i has a concave portion 20 in which the facing edge 19 is recessed on the side of the center line C of each net segment Ni, whereby the facing edge 19,
A substantially spindle-shaped opening 21 is formed between the openings 19. Further, in this example, the circumferential opening length Vi (i = k) of one of the plurality of openings 21 is made larger than the opening length Vi (i ≠ k) of the other openings 21. The size of the maximum circumferential length Vk, which is the increased opening length, is regulated.

FIG. 4 shows the maximum opening 21k.
The largest opening 21k is used for pulling out the annularly joined net main part 3 from the rear side of the tire to the front side at the tire grounding part when mounting the net. Accordingly, a joint J formed between both ends of the net main portion 3 is formed.
It is preferable to form the connection portion J2 at a position opposed to the connection portion J1.

After the opening 21k is pulled out to the front side, the front side portion of the tire is firmly fixed by the auxiliary band portion of the tightening band 7.

Here, the circumferential length Vi of the opening 21 will be described in detail. As shown in FIG. 4, the one end support point Pi of the net segment Ni and the recess 2 of the one end member 9A are provided.
NAi is the length on the center line between the innermost portion Ai and the deepest portion Ai, and the other end support point Qi + 1 and the other end member 9B of the adjacent net segment Ni + 1 are on the other end. Assuming that the length of the concave portion on the other end between the concave portion 20i + 1 and the deepest portion Bi + 1 is NBi + 1 and the length between the end support points Pi and Qi + 1 is JLi, the circumferential length is Vi can be represented by the following equation (3A). When i = n, Ni + 1 becomes N1. Vi = NAi + NBi + 1 + JLi (3A) where {JLi = {(L0−TL) × NL} / TL (3B) In equation (1),

L0 is linearly developed by separating the wound fixed rope 5 at a separation point G, as shown in FIG. 6 (B).
This is the total length of the deployed rope when a load of 20 kg is applied between the separation points G at both ends. TL is a linear portion of the wound fixed rope 5 fixed between the one end side support point Pi and the other end side support point Qi as shown in FIG. 6 (A). Length L between the ropes PQ when the rope is unfolded and a 20 kg load is applied
The sum of PQiΣLPQi. NL is one end end support point Pi and the other end end support point Qi of the net segment Ni when it is developed on a plane as shown in FIG.
Is the sum of the divided field development lengths NPQi between と and NPQi.

Here, equation (3B) will be described.
(L0-TL) of the right side of (B) is the sum of the peripheral lengths between the adjacent support points Pi and Qi + 1 in each opening 21, and the sum of the peripheral lengths is the outer circumference of the tire tread. In the above, it is expanded to {(L0−TL) × NL / TL}.
Therefore, the left side of the equation (3B) to which each length JLi is added is {(LO−TL) × NL} / TL

The maximum circumferential length Vi (i = k)
Preferably satisfies the following expression (4). (L0 × NL / TL) × 0.075 ≦ Vi (i = k) ≦ (L0 × NL / TL) × 0.125 (4)

In the equation (4), (L0 × NL / TL)
Is approximately equivalent to the entire circumference of the tire tread. Therefore, the equation (4) restricts the maximum circumferential length Vk to a range of 0.075 to 0.125 times the total circumference. Means that. When the maximum circumferential length Vk is less than 0.075 times, the opening 21k becomes smaller than the tire contact length, and it is difficult to pull out the net to the front side of the tire without jacking up and moving the vehicle. On the other hand, when it exceeds 0.125 times, the ride comfort is deteriorated. In order to suppress the deterioration of ride comfort to a level that is not noticeable by a general driver, it is preferable that the maximum circumferential length Vk is in the range of 0.10 times. The circumferential length Vi (i ≠ k) other than the maximum circumferential length Vk is smaller than Vk, and is 0.10 times (L0 × NL / TL) similarly from the viewpoint of ride comfort. Or less, more preferably 0.75 times or less.

The ratio of the concave length NAi and the concave length NBi + 1 to the circumferential length Vi is in the range of 0.2 to 0.4 times the circumferential length Vi. Is preferred. When it is less than 0.2 times, the edge 19 of the concave portion is close to the direction of the lateral groove of the tire, and the end member 9 is likely to be fitted into the lateral groove. On the other hand, when it exceeds 0.4 times, the inside of the tire and the net are caught, and it becomes difficult to pull out the net. Still more preferably, NAi = NBi
+1.

With respect to the riding comfort, the smaller the number of the openings 21, that is, the smaller the number n, the smaller the number of impacts at the time of contact with the ground, so the better the riding comfort.
It is preferable to set the following. Also, in this example, the largest opening 2
At 1k, in order to further reduce the impact itself at the time of contact with the ground, as shown in FIG.
As shown in the cross section in FIG. 5, a peripheral portion 22 (shown by a dot pattern) extending along the edge is formed by an inclined surface 22S formed by cutting off the edge on the grounding surface side (upper surface side). At this time, it is preferable that the width 22W of the inclined surface 22S be 5 mm or more and 9 W or less of the end member 9 from the viewpoint of strength and ride comfort. The inclined surface 22S also has an effect that the net can be more easily pulled out to the front side of the tire.

The opening 21 may have a diamond shape as shown in FIG. 7A or an intermediate shape between them, in addition to an elliptical shape as in this embodiment. Further, as shown in FIG. 7B, the shape of the concave portion 20 on one side and the shape of the concave portion 20 on the other side may be made different from each other. Fig. 7
As shown in (C), the deepest portions Ai and Bi + 1 that are most concave may be formed to be separated from the center line C inward and outward in the width direction.

Therefore, as shown in FIGS. 8A to 8C, the connecting portions 5a and 5b of the fixed rope 5 are connected on the back side of the tire T, and the net main portion 3 is connected in a substantially annular shape. At this time, the tire front side of the opening 21k is wide open due to the open state. Thereafter, the opening 21k is made to face the tire contact portion Ta, and the tire contact portion Ta can be inserted into the opening 21k by pulling the tire to the front surface side, and the outer edge of the net main portion 3 is not jacked up. Can be withdrawn. Thereafter, the tightening band 7 is attached to the entire outer edge of the drawn out main part 3 of the net to increase the restraining force particularly on the maximum opening 21k, thereby assuring floating of the net and fluctuation in the circumferential direction. To suppress.

The tightening band 7 is entirely or partially made of an elastic material having extensibility. In the present embodiment, FIG.
(B), a band main portion 30 provided at each locking point 6, for example, locked by a hook fitting 17, and pulling each locking point 6 inward in the radial direction; 21k
And an auxiliary band portion 31 for restraining the above. In this example, the band main portion 30 has an endless annular shape, and is wound around each of the locking points 6.

Also, as shown in FIG.
1k, the end member 9A on one end and the end member 9B on the other end are positioned at the same position as or different from the locking point 6, in this example, at a different position from the locking point 6, and the force point Fj on the one end side and other An end point Gj + 1 is arranged. The net division body Ni is
The other power point H, which is separated from the power point Fj by the length Ra on the opposite side beyond the opening 21k, and the power point Gj + 1 to the opening 2
On the opposite side beyond 1k, the other point of force I is separated by a length Rb.

A locking portion 24 for locking the auxiliary band portion 31 is formed at the power points Fj and Gj + 1, and a locking portion 25 is also formed at the power points H and I. In this example, one of the hook fittings 17 is used as the locking portion 25. In this example, the locking portion 24 is provided as shown in FIGS. 10 (A) and 10 (B).
A rotatable or non-rotatable pulley fitting 29 attached to the end member 9 as shown in FIG.
Has a circumferential groove 29A for engaging directly.

The auxiliary band portion 31 is provided with the power points Fj,
An annular tightening rope 32 spanning between Gj + 1 and a power point H,
I and an annular fastening rope 33 extending between
Are connected by In this example, the tightening rope 32 is formed of a low-stretch inelastic rope such as a fiber rope, and the tightening rope 33 is formed of a high-stretch elastic rope. Accordingly, the auxiliary band portion 31 tilts the power point Fj toward the power point H, that is, tilts the power point Fj in the circumferential direction from the center of the tire.
Tightening at an angle θ larger than the
j + 1 is tightened toward the power point I, that is, the power point Gj + 1 is tightened at an angle θ larger than 90 degrees, which is inclined in the circumferential direction from the center of the tire.

As described above, since the end of the largest opening 21k on the tire surface side is connected using the elastic auxiliary band 31, a strong force is not required for the connection. For circumferential fluctuation of the opening during running,
Works effectively. In general, during running, the circumferential length Vi becomes narrower than when the net is attached due to the effect 7 of the tightening band, and the tightening force is directed toward the center of the tire. It tends to decrease. On the other hand, in the present application, since the tightening direction is inclined in the circumferential direction from the center of the tire, the opening 21k can be tightened in both the circumferential direction and the radial direction of the tire in a well-balanced manner, and the binding force can be greatly increased. .

Here, the lengths Ra and Rb between the force points are:
It can be set in a range that satisfies the following equations (1) and (2),
It is preferable to keep the tightening balance high. The lengths Ra and Rb between the force points are the distances between the force points Fj and H and the circumferential points of the force points Gj + 1 and I in the circumferential direction. (L0 × NL / TL) × 0.20 ≦ Ra ≦ (L0 × NL / TL) × 0.45 ... (1) (L0 × NL / TL) × 0.20 ≦ Rb ≦ (L0 × NL / TL) × 0.45 ... (2)

In equations (1) and (2), (L0 × NL
/ TL) approximately corresponds to the entire circumference of the tire tread outer circumference. Therefore, the equations (1) and (2) are equivalent to the length R between the respective power points.
This means that a and Rb are restricted to a range of 0.20 to 0.45 times the entire circumference of the net.

Each of the distances Ra and Rb between the force points is 0.2.
If it is less than twice, the binding force of the net in the tire radial direction is weak, and the lifting of the net during running becomes a problem.
On the other hand, if it exceeds 0.5 times, the restraining force against the fluctuation in the circumferential direction of the tire is weak, and excessive movement of the end of the opening in the circumferential direction becomes a problem. Therefore, it is preferably in the range of 0.20 to 0.40 times.

The lengths Sa and Sb on the center line C between the power points Fj and Gj + 1 and the deepest parts Ai and Bi + 1 shown in FIG.
0.15 to 0.35 of the circumferential length Vi of the opening 21
Preferably, it is doubled. This is less than 0.15 times,
This is because the edge 19 of the concave portion tends to approach the direction of the lateral groove of the tire, and the end member 9 is more likely to be fitted into the lateral groove. Conversely, if it exceeds 0.35 times, the tightening force in the circumferential direction of the end of the opening becomes stronger, and the end members 9A and 9B come into contact with each other during running, causing damage to the net. Still more preferably, Sa = Sb.

FIGS. 12A and 12B show another example of the tightening band 7. FIG. In the figure, 26A is a hook-shaped engaging portion which is locked by the locking portion 24A of the power point Fj, and 26B is a power point G.
An engagement portion 26C of a ratchet structure engaged with the j + 1 engagement portion 24B is a hook-shaped engagement portion engaged with the engagement portion 24A. Reference numeral 36 denotes an inelastic rope, which is loosely inserted into the ratchet 26B and connected to the elastic rope 37. Therefore, by providing the ratchet mechanism in the engagement portion 26B, the auxiliary band portion 31 can tighten the points of force Fj and H, the points of force Gj + 1 and I, and the points of force Fj and Gj + 1. Note that the locking portion 24 and the engaging portion 26 are as shown in FIG.
As shown in (F) to (F), various forms such as hook fittings or simple small holes can be adopted.

FIGS. 13A and 13B show still another example of the tightening band 7. FIG. In the figure, 40 is a joint J
The engaging portion 41 of a ratchet structure protruding the hook fittings to be locked at the small hole-like locking points 6 in 1, and the band 41 wraps around the hook fittings 17 of the locking point 4 without the band main part 30. The inelastic rope 42 that is attached and folded at both ends of the engaging portion 40 is an elastic rope connected to the inelastic rope 41. At an end of the elastic rope 42, an annular non-elastic rope 43 that is bridged between the locking portions 24A and 24B via the fitting 34 is disposed substantially in the same manner as in FIG. Therefore, in this example, the engaging portion 40, the folded portion of the inelastic rope 41,
The auxiliary band portion 31 is formed by the elastic rope 42 and the non-elastic rope 43.

14A and 14B, hook-shaped engaging portions 26A and 26B are attached to the respective ends of the elastic rope 42 instead of the inelastic rope 43 shown in FIG. Therefore, in this example, the point between the power points Fj and Gj + 1 is not directly tightened.

15A and 15B, instead of the inelastic rope 43 shown in FIG. 13, a hook-shaped engaging portion 26A is provided at one end of the elastic rope 42, and a non-elastic rope 45 is provided at the other end. A hook-shaped engaging portion 26B is attached via a rope 46.

In FIGS. 16 (A) and 16 (B), reference numeral 26B denotes an engaging portion having a ratchet structure which is locked by the locking portion 24B, 50 denotes the band main portion 30 and the hook metal members 17 at the locking point 4. A non-elastic rope 51 wound around and bent at both ends of the engaging portion 26B is an elastic rope connected to the non-elastic rope 50. At the tip of the elastic rope 51, the engaging portion 26 locked by the locking point 24A and the engaging portion 26B is provided.
A, 26D are provided.

FIGS. 17A and 17B show a case where the tightening band 7 is formed in a single rope shape. In the figure, 2
6A and 26B are engagement portions of a ratchet structure which are engaged with the engagement portions 24A and 24B.
A non-elastic rope having an engaging portion 26C to be locked to the first armature A and loosely inserting the engaging portions 26A and 26B of the ratchet structure;
Reference numeral 48 denotes an elastic rope connected to the inelastic rope and having an engaging portion 26D provided at the tip thereof to be engaged with the engaging portion 26B. Therefore, in this example, the locking portions 26A, 26B, 26
C, the band main part 30 is constituted by the inelastic rope 47, and a part of the inelastic rope 47, the elastic rope 48
The auxiliary band portion 31 is formed by the locking portions 26A, 26B, and 26D.

It should be noted that the band main portion 30 made of an annular elastic rope shown in FIGS. 9, 12 and the like may be configured as shown in FIG. Reference numeral 40 denotes an engagement portion having a ratchet structure which is locked by the joint portion J1, 55 denotes an inelastic rope whose both ends are folded back by the engagement portion 40, and 56 denotes an elastic rope connected to the inelastic rope 55. Thus, various structures can be employed as the tightening band 7.

[0047]

EXAMPLE Based on the specifications shown in Tables 1, 2, and 3, a non-slip net that can be mounted on a tire of 195 / 65R15 was prototyped, and the mounting properties and lifting when each sample was mounted on the tire. The amount and ride performance were compared.

· Wearability: Rear wheels (tire size: 195 / 65R1) for passenger cars (2000cc sedan, FR)
5) Attach a sample of the anti-slip net in a grounded state. At this time, after connecting both ends of the inner fixed rope, the end of the largest opening 21k was pulled out to the front side of the tire in the ground contact state, and a five-point evaluation was made in consideration of the ease of pulling out and the distance that was pulled out. . The larger the index value, the better.・ Floating amount: A sample of the anti-slip net is placed on the rim (1
5 × 6JJ) mounted on a rim-assembled tire (195 / 65R15) with internal pressure (200 kpa), and the indoor drum smooth surface was rotated under the conditions of load (50 kgf) and speed (60 km / h) to set it in a dark room. Using a flash, the amount of lift between the tire and the net was measured.

Ride comfort performance: A sample of a non-slip net was used for the right rear wheel (rim:
15 × 6JJ / Internal pressure: 200kpa) Only on dry asphalt road surface, 2 passengers, speed 40km
The vehicle was driven at a constant speed at / h. At that time, the magnitude of the vibration in the right rear seat and the impact sound of the connection part were sensory-rated in five stages. The larger the index value, the better.・ Comprehensive evaluation: Comprehensive evaluation of the above-mentioned wearability, the amount of lift, and the riding comfort performance, and the results are shown as ○ (excellent), Δ (normal), ×
(Poor).

[0050]

[Table 1]

[0051]

[Table 2]

[0052]

[Table 3]

[0053]

As described above, according to the present invention, the power points Fj and Fj are respectively applied to the end members on one end and the other end of the net divided body sandwiching the opening.
Gj + 1 is provided, and each point of force Fj, Gj + 1 is stretched at an angle inclined in the circumferential direction from the center of the tire using a tightening band. Fluctuation in the direction can be effectively suppressed.

[Brief description of the drawings]

FIG. 1 is a side view of a state in which a non-slip net according to one embodiment of the present invention is mounted on a tire as viewed from the rear side of the tire.

FIG. 2 is a side view of the anti-slip net as viewed from a tire front side.

FIG. 3 is a development view showing a non-slip net developed on a plane.

FIG. 4 is an enlarged view showing an opening.

FIG. 5 is a cross-sectional view showing an inclined surface at a periphery of an opening.

FIG. 6A is a diagram for explaining a developed length LPQi between ropes PQ, and FIG. 6B is a diagram for explaining a total deployed length LO of a rope.

FIGS. 7A to 7C are enlarged views showing another embodiment of the opening.

FIGS. 8A to 8C are diagrams illustrating a method of mounting a non-slip net.

FIGS. 9A and 9B are diagrams illustrating a tightening band.

FIGS. 10A and 10B are diagrams illustrating a locking portion.

FIGS. 11A to 11F are diagrams illustrating another example of the locking portion and the engaging portion.

12A and 12B are diagrams illustrating another example of the tightening band.

FIGS. 13A and 13B are diagrams illustrating another example of the tightening band.

14A and 14B are diagrams illustrating another example of the tightening band.

FIGS. 15A and 15B are diagrams illustrating another example of the tightening band.

16A and 16B are diagrams illustrating another example of the tightening band.

17A and 17B are diagrams illustrating another example of the tightening band.

FIG. 18 is a diagram illustrating another example of the tightening band.

FIG. 19 is a perspective view schematically illustrating a conventional anti-slip net.

FIGS. 20A and 20B are developed views illustrating an example of a conventional technique.

[Explanation of symbols]

 Reference Signs List 3 Net main part 4 Support point 5 Fixed rope 6 Locking point 7 Tightening band 9, 9A, 9B End member 10 Net-shaped member 19 Facing edge 20 Depression 21, 21k Opening 31 Auxiliary band part Ai Deepest part of concave part E1 One end Part E2 Other end G Disconnection point Ni Net division

Claims (2)

[Claims] 1. A net segment formed of one or more n pieces having flexibility and having a main net portion formed by arranging one end portion and the other end portion in the longitudinal direction of the net so as to face each other in the tire circumferential direction. And a fixed rope which is wound in a chord around support points arranged inward on the inner side facing the vehicle body center of the net split body and is fixed to the support points to connect the net split bodies and to be separable at a separation point; A non-slip net for a tire, comprising a tightening band that applies tension to the main portion of the net by being locked at a locking point outside the body, wherein the net segment is the one end and the other end. The net-shaped member is arranged between the end members arranged in the portion, and the end members of the net divided body facing each other by being adjacent in the circumferential direction are such that the facing edges are concave on the center side of each net divided body. The concave part Thus, a substantially spindle-shaped opening is formed between the facing edges, and the support points are formed by the respective divided nets Ni (i = 1 to n).
And the other end side end support point Qi of the other end member, and the net segment is formed of one end side sandwiching the opening. The end member and the end member on the other end side have a force point Fj on one end side and a force point Gj + 1 on the other end side, and the tightening band includes the force point Fj on one end side and the force point Gj + on the other end side. 1. An anti-slip net for tires, comprising an auxiliary band portion which tilts 1 and 2 in the circumferential direction from the center of the tire and stretches each of the net segments Ni and Ni + 1 at an angle larger than 90 degrees. 2. The one-end end support point of the net split body when the fixed rope is unfolded at the separation point, and the unfolded length of the rope, which is the unfolded length under a load of 20 kg when the rope is unfolded, is L0. The sum ΣNPQi of the split body development length NPQi, which is the development length between Pi and the other end support point Qi, is NL, the one end support point Pi of the fixed rope, and the other end support. When the sum ΣLPQi of the deployed length LPQi between the ropes PQ, which is the deployed length under a load of 20 kg between the point Qi and the point Qi, is TL, the auxiliary band portion includes the one-side force point Fj and the other-side force point Gj + 1 and the other force point H separating the length Ra on the circumferential center line satisfying the following equation (1) from the one end side force point Fj.
And the other force point I separating the length Rb on the circumferential center line satisfying the following equation (2) from the other end side force point Gj + 1, so that the auxiliary band portion is stretched at the large angle. The anti-skid net for a tire according to claim 1, wherein the net is mounted. (L0 × NL / TL) × 0.20 ≦ Ra ≦ (L0 × NL / TL) × 0.45 ... (1) (L0 × NL / TL) × 0.20 ≦ Rb ≦ (L0 × NL / TL) × 0.45 ... (2)