JPH045525B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for manufacturing a tire anti-slip device. (Prior art) Non-metallic anti-slip devices for automobile tires include those shown in Japanese Patent Publication No. 13337/1982 and Japanese Patent Publication No. 49366/1983, in which the string-like core material is made of rubber or the like. A non-slip device is constructed by being covered with a plastic covering material. By the way, in such a non-slip device, it is necessary to use a material with a large coefficient of friction as a covering material on the tire side part so that the non-slip device does not easily slip on the tire. On the opposite side, it is necessary to use a wear-resistant material as a covering material so that the cleat is less prone to wear. However, in the past, all the covering materials of the anti-slip device were made of the same material. (Problem to be solved by the invention) For this reason, in the anti-skid device, both the characteristics required in the tire side part and the characteristics required in the part opposite to the tire side part are sufficient. In order to achieve this, it is necessary to use a material that has wear resistance and a high coefficient of friction as a covering material.Therefore, in the past, it has been possible to achieve both of the above characteristics without incurring high costs. It was difficult to make it sufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a tire skid device that can solve the above problems. (Means for Solving the Problems) In order to achieve the above object, the first feature of the present invention is that the plastic material 1 made of a non-metallic material
3a and 13b are press-molded and vulcanized to form a mesh shape and wrapped around the outer periphery of the tire 1. In this method, the tire side portion of the anti-skid device is The first plastic material 13a constituting the material and the second plastic material 13b which constitutes the part on the side opposite to the tire side part of the skid device and whose material is different from the first material 13a are placed in a lower mold 33 of a press machine. are inserted in a predetermined order into the mesh-like grooves 34 of the materials 13a,
13b is press-molded and vulcanized. Furthermore, the second feature of the present invention is that the plastic materials 13a and 13b made of non-metallic materials are press-molded and vulcanized to form a mesh shape and are wound around the outer circumference of the tire 1. In the method of manufacturing a non-slip device for a tire, the first plastic material 13a constitutes a tire side portion of the non-slip device, and the first material constitutes a portion of the non-slip device opposite to the tire side portion. A second plastic material 13b having a different material from 13a is extruded by an extruder in a state in which they are arranged side by side, and the extruded first material 13b is
Both the second raw materials 13a, 13b are inserted into the mesh groove 34 of the lower mold 33 of the press machine with one side facing up, and the first and second raw materials 13a, 13b are
It is press-molded and vulcanized. (Function) According to the present invention, when manufacturing the anti-slip tool 8, the first plastic material 13a and the second plastic material 13b are
It is inserted into the mesh groove 34 of the lower mold 33 of the press machine. After that, both the first and second materials 13a,
13b is press-molded and vulcanized, thereby manufacturing the anti-slip tool 8. (Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 2 and 3, reference numeral 1 indicates a tire, a tread portion 2, both shoulder portions 3, both sidewall portions 4 and It has both bead portions 5 and has a toroidal cross section, and both bead portions 5 are fitted into bead seats of a rim 6. Note that 7 indicates a disk. In FIGS. 1 to 3, reference numeral 8 denotes a band-shaped anti-slip device in the unfolded state, which is located on the main body portion 9 located on the tread portion 2, on both shoulder portions 3, and on both side wall portions 4. It has both side edges 10 and 11. As shown in FIG. 4 and FIG.
13b, it has a mesh-like structure. The core material 12 is made of synthetic fiber or natural fiber such as polyester, nylon, or rayon. Note that it is desirable that the core material 12 has no (non-stretchability) or low stretchability. The first covering material 13a is located on the tire side portion of the antiskid tool 8, and the second covering material 13b is located on the opposite side of the antiskid tool 8 from the tire side portion. The first covering material 13a is made of a material that has a large coefficient of friction and has excellent adhesion to the tire 1, so that the anti-slip device 8 is difficult to shift relative to the tire 1. Moreover, the hardness of the first coating material 13a is the same as that of the second coating material 13.
The hardness is said to be greater than that of
Even if the covering material 13b moves due to contact with the road surface, the first covering material 13a is prevented from following the movement of the second covering material 13b. It is designed so that it does not easily shift. The first covering material 13a is, for example, made of a compound mainly composed of natural rubber or diene-based synthetic rubber, and is
Made of material with A hardness of 65 degrees or higher. The second covering material 13b is made of a material with low hardness and has excellent on-ice performance such as slip resistance and traction performance, as well as excellent durability and abrasion resistance. . Note that the lower the hardness of the second covering material 13b, the better the on-ice performance, but if it is too low, problems will arise in durability, abrasion resistance, etc. Considering the above circumstances, the hardness of the second covering material 13b will be improved. Hardness is determined. The second covering material 13b is, for example, made of a compound mainly composed of natural rubber or diene-based synthetic rubber, and is
It is made of material with an A hardness of 55 to 70 degrees. In the main body part 9, axial parts 14 parallel to the axial direction of the tire 1 are arranged in parallel at predetermined intervals in the circumferential direction of the tire 1 (band longitudinal direction). Further, in a portion extending from the main body part 9 to the side edge part 10, an inclined part 15 which is inclined with respect to the axial direction and the circumferential direction of the tire 1 is connected to the axial part 14. In the portion 9, a mesh 16 having a substantially hexagonal shape is provided on the tire 1.
are arranged in succession in the circumferential direction. Furthermore, tires 1 are mounted on both side edges 10 and 11, respectively.
The axial parts 17 and 18 parallel to the axial direction of the tire 1
are arranged in parallel at predetermined intervals in the circumferential direction. or,
In a portion extending from the side edge portion 10 to the side edge portion 11, an inclined portion 19 that is inclined in both the axial direction and the circumferential direction of the tire 1 is formed in a continuous manner with the axial portion 17. Furthermore, a tire 1 is provided on the outer peripheral edge side of the side edge portion 11.
An inclined portion 20 that is inclined with respect to the axial direction and circumferential direction of the
are connected to the axial portion 18. Thereby, meshes 21 and 22 each having a substantially hexagonal shape are provided in succession in the circumferential direction of the tire 1 on each of the side edges 10 and 11. Reference numeral 23 denotes connection parts formed at both ends of the anti-slip tool 8, which have connection holes, and when the connection fittings 24 are removably engaged with these connection holes, the two connection parts 23 are separated. freely connected. In addition, each part 14, 15, 17 to 20 of the anti-slip tool 8,
The cross-sectional shape of 23 is approximately trapezoidal, wide on the tire 1 side and narrow on the opposite side to the tire 1 side. 28 is a spike tool, which is attached to the axial portion 14 of the main body portion 9;
It is inserted into the insertion holes 29 on both sides of the body 3.
0, a pair of flanges 31 provided at both ends of the body 30, and a spike portion 32 protruding from the tip side flanges 31. The collar part 31 has a larger diameter than the body part 30, and the base side collar part 31 and the base of the body part 30 are inserted into the first covering material 13a and are located between the left and right reinforcing core materials 12, The bottom surface of the base-side flange portion 31 is exposed from the first covering material 13a. As mentioned above, the base of the spike device 28
Since it is included in the first covering material 13a which is harder than the covering material 13b, the spike tool 28
Even if an external force is applied from the road surface, the spikes 28 do not move significantly; therefore, the spikes 28
does not easily fall off from the covering materials 13a, 13b. Further, the distal end side of the body portion 30 of the spike tool 28 is inserted into the second covering material 13b, and the spike portion 32 protrudes from the second covering material 13b. Reference numeral 25 indicates a side rope, and reference numeral 25' indicates a rubber elastic ring.As shown in FIG. The ends of the two are separably connected to each other by a connector 26 shown in FIG. Then, this side rope 25 and the elastic ring 2
5' and the meshes 22 and the like on both side edges 10 and 11 are connected to the inner and outer sides in the radial direction by the connectors 27, whereby the anti-slip device 8 is attached to the tire 1. 28 is a spike tool, which is attached to the axial portion 14 of the main body portion 9;
It is inserted into the insertion holes 29 on both sides of the body 3.
0, a pair of collar parts 31, and a spike part 32. By the way, when manufacturing the above-mentioned anti-slip tool 8,
First, the lower mold 33 of the press machine as shown in FIG.
A plastic second covering material 13b made of unvulcanized synthetic rubber or the like and exemplified as a plastic second material is inserted into the mesh groove 34 as shown in FIG. Incidentally, the left groove 34 in FIGS. 7 to 9 indicates those forming each part 14, 15, 17 to 20 of the anti-slip device 8, for example, the center part of the axial part 14, and , right grooves 34 are shown forming each side of the axial portion 14. Further, as the second covering material 13b, there are cases in which a string-like material extruded by an extruder is used, and a material obtained by punching out a plate material into a mesh shape by a press machine. Then, the core material 12 is passed through an extruder, and the core material 12
is made of unvulcanized synthetic rubber, etc., and has a second plasticity.
The string-shaped first covering material 13a containing the core material 12 is placed in the groove 34 of the lower mold 33 as shown in FIG. It is inserted and placed on the second covering material 13b. In the above case, the string-like first covering material 13a is inserted into the groove 34 as it is and stretched around it in a mesh shape, and the string-like first covering material 13a is structured into a mesh body and the lower metal It may be inserted into the groove 34 of the mold 33 in some cases. In the latter case, that is, the string-like first covering material 13
When forming a mesh body using a, a mesh forming table 38 shown in FIG. 10 or 11 is used. In the mesh forming table 38 shown in FIG. 10, as shown in FIG. 12, mesh forming grooves 39 corresponding to the mesh grooves 34 of the lower mold 33 are formed.
Furthermore, in the mesh forming table 38 shown in FIG.
As shown in the figure, a large number of guide shafts 40 are implanted so as to correspond to the mesh grooves 34 of the lower mold 33. Then, the mesh forming groove 39 of the mesh forming table 38
A string-shaped first covering material 13a is placed inside or on the guide shaft 40.
By stretching the meshes 16 and 2 of the anti-slip device 8,
1 and 22 are formed, respectively. Next, as shown in FIGS. 14 to 16, a plurality of first covering materials 13a constituting the same side of each of the meshes 41, 42, 43 are attached to rubber tape 44, adhesive 45, joining metal fittings 46, etc. By joining them together, a mesh body is constructed. Then, as shown in FIG. 9, the first and second covering materials 13a,
13b and the core material 12 are press-molded and vulcanized to form coating materials 13a on both sides of the axial portion 14,
The pin portion 4 of the upper mold 47 is located at the center in the width direction of 13b.
8, an insertion hole 29 is formed therethrough. Next, the insertion holes 29 of the covering materials 13a, 13b are pushed open and the spike tool 28 is driven into the insertion hole 29, thereby completing the production of the anti-slip tool 8. 17 to 21 show another method of manufacturing the anti-slip device 8. First, as shown in FIG. After inserting the material 13b, as shown in FIG.
The second coating material 13b is press-molded using the upper and lower molds 51 and 33 and semi-vulcanized. In this case, the upper mold 51 is formed with a protrusion 52 that protrudes downward in correspondence with the groove 34 of the lower mold 33, and the upper surface of the second covering material 13b is formed by the press molding. A groove 53 for inserting a core material is formed over the entire length. At this time, the second covering material 13b
A single concave groove 37 is formed in most of the parts.
As shown in the right part of FIG.
In the portions corresponding to both sides of the second covering material 13b
Two grooves 53 for inserting the core material are formed in the groove. Next, as shown in FIG. 19, the second covering material 13
Insert the core material 12 into the core material insertion groove 53 of b. In this case, the core material 12 may be one woven into a mesh shape by means such as lattice weaving, or the core material 12 may be a string-like material with a concave groove for inserting the core material. In some cases, the core material 12 is stretched in a mesh-like manner, and in other cases, a cord-like material configured in a mesh body is used as the core material 12. In the last case, that is, when forming a mesh body using the string-like core material 12, the mesh forming table 38 shown in FIG. 10 or 11 is used to form the first covering material 1.
In the same way as in the case where the mesh body is constructed using 3a,
It constitutes a mesh body. Then, as shown in FIG. 20, the unvulcanized first coating material 13a is placed on the second coating material 13b. In addition, as the first and second covering materials 13a and 13b, there are two cases: a string-like material extruded by an extruder, and a mesh-shaped material punched from a plate material by a press machine. be. Next, as shown in FIG. 21, the upper mold 5 is
With an upper mold 47 different from 1 and a lower mold 33,
The first and second sheathing materials 13a and 13b and the core material 12 are press-molded and vulcanized. The insertion hole 29 is formed through the pin portion 48 of the mold 47 . In the above case, two methods for making the upper mold 47 and the lower mold 33 correspond are a method of replacing the upper mold 51 of the press machine with the upper mold 47, and a method of replacing the upper mold 51 of the press machine with the lower mold 47, There is a method of moving the mold 33 relatively. FIG. 22 shows another method of manufacturing the anti-slip device 8, in which a string-like core material 12 is passed through an extruder and covered with unvulcanized first and second covering materials 13a and 13b. Next, the first and second covering materials 13a, which are shaped like strings,
13b is stretched in the groove 34 of the lower mold 33 in a mesh pattern, and then press-molded and vulcanized. FIG. 23 shows another example of the anti-slip device 8, and the spike device 28 is constructed by connecting a collar portion 31, a body portion 30, and a spike portion 32 toward the tip side. . The base side of the collar portion 31 and body portion 30 is covered with the first covering material 13
It is contained in a. FIG. 24 shows still another example of the anti-slip device 8.
Only the portion of the anti-slip device 8 between the spike device 28 and the tire 1 is locally formed of the first covering material 13a, and the other portion is formed of the second covering material 13b. Incidentally, as shown by the imaginary line in FIG. 8, the entire portion of the anti-skid device 8 closer to the tire than the spike device 28 in the thickness direction may be formed of the first covering material 13a. Next, a non-slip device 8 was manufactured and a comparative test was conducted. Table 1 below shows the second covering material 13b of the anti-slip device 8.
For convenience, the first and second coating materials 13a and 13b of the non-slip device 8 are entirely formed of the materials shown in each example in Table 1, and the composition examples and test results of the non-slip device 8 are shown. Durability, abrasion resistance, performance on ice, etc. were investigated. In the test results in Table 1, ◯ indicates excellent, △ indicates good, and × indicates poor. Looking at the test results, it can be seen that the inventive examples are superior to the comparative examples.

【table】

[Table] The second table below shows the first covering material 13a of the anti-slip device 8.
An example of the composition of the present invention is shown.

【table】

[Table] Next, as shown in Table 3 below, the first and second covering materials 13a and 13b of the anti-slip device 8 were formed using several composition examples shown in Tables 1 and 2, respectively. The durability of anti-skid device 8, abrasion resistance, performance on ice and snow, tire 1
We investigated the misalignment performance, etc. In the test results in Table 3, ◯ indicates excellent and △ indicates good. Looking at the test results, the inventive example was better than the comparative example.
It can be seen that the number of cases is large and excellent.

[Table] In the example, the coating material had a two-layer structure, but
The number of layers of the covering material may be three or more. Further, the anti-slip tool does not need to be provided with a core material. Furthermore, although the present invention is applied to a so-called mesh-type non-slip device in the embodiment, the present invention can also be applied to a so-called ladder-type (chair-type) non-slip device. (Effects of the Invention) According to the first invention, the first plastic material forming the tire side portion of the antiskid device and the first material forming the opposite side portion of the antiskid device from the tire side portion. A plastic second material of different material is inserted in a predetermined order into the mesh groove of the lower mold of a press machine, arranged one above the other, and both the first and second materials are press-formed and processed. Since it is sulfurized, the above-mentioned anti-slip device can be easily manufactured. Furthermore, according to the second invention, the plastic first material forming the tire side portion of the antiskid device and the plastic first material forming the opposite side portion of the antiskid device from the tire side portion, and the first material are different in material. A second material of different plasticity is extruded by an extruder in a state in which they are arranged side by side, and both the extruded first and second materials are placed in a mesh-shaped concave part of a lower mold of a press machine with one side facing up. It is inserted into the groove, and both the first and second materials are press-formed and vulcanized.
The above-mentioned non-slip device can be manufactured more easily.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the anti-slip device, FIG. 2 is a side view of the anti-skid device mounted on a tire, and FIG. The sectional view taken along the line A, and the figures in Figures 4 and 5 are B in Figure 1.
6 is a plan view showing the lower mold, 7 to 9 are sectional views showing the method of manufacturing the non-slip device, 10 Each of the figures in FIG. 1 and FIG. 11 is a plan view showing an example of the mesh forming table,
2 is a sectional view taken along the line D-D in FIG. 10, FIG. 13 is a sectional view taken along the line E-E in FIG. 11, and FIGS. 14 to 16 show the method of joining the first covering material. cross section,
17 to 21 are cross-sectional views showing another method of manufacturing the anti-slip device, FIG. 22 is a cross-sectional view showing still another method of manufacturing the anti-slip device, and FIGS. 23 and 24 are Each figure is a sectional view of a main part showing other examples of the anti-slip device. DESCRIPTION OF SYMBOLS 1...Tire, 8...Slipper, 12...Reinforcement core material, 13a, 13b...First and second covering material, 33
... lower mold, 34 ... concave groove, 47, 51 ... upper mold.

Claims (1)

[Claims] 1. Plastic materials 13a, 13 made of non-metallic materials
In the method for manufacturing a tire skid device, in which b is press-molded and vulcanized to form a mesh shape and wrapped around the outer periphery of the tire 1, the tire side part of the skid device is formed. The first plastic material 13a and the second plastic material 13b, which constitutes a portion on the opposite side of the anti-slip device from the tire side portion and is different in material from the first material 13a, are inserted into the mesh of the lower die 33 of a press machine. The first and second materials 13a,
13b is press-molded and vulcanized. 2 Plastic materials 13a, 13 made of non-metallic materials
In the method for manufacturing a tire skid device, in which b is press-molded and vulcanized to form a mesh shape and wrapped around the outer periphery of the tire 1, the tire side part of the skid device is formed. The first plastic material 13a and the second plastic material 13b, which constitutes a part on the opposite side of the anti-slip device from the tire side part and is different in material from the first material 13a, are placed side by side, and are then extruded by an extruder. extrusion, this extruded first
Both the second raw materials 13a, 13b are inserted into the mesh groove 34 of the lower mold 33 of the press machine with one side facing up, and the first and second raw materials 13a, 13b are inserted.
A method for manufacturing a tire anti-slip device, which comprises press-molding and vulcanizing.