JPH03258604A - Tire antiskid device and manufacture thereof - Google Patents

Abstract

PURPOSE:To eliminate the need of the conventional positioning process by forming a sheet-like reinforcing member buried in a tire antiskid member by bending continuously formed plural reinforcing sheet pieces of the same shape between the adjacent reinforcing sheet pieces and superposing one another. CONSTITUTION:A reinforcing member 26 is buried in a tire antiskid device in order to improve the rigidity of a tire antiskid member. In this case, the reinforcing member 26 is formed by a canvas cloth piece 29 as a reinforcing sheet formed by punching the canvas cloth 28. The canvas cloth piece 29 is formed by plural canvas small pieces 29A, 29B of the same shape. Further,the canvas small pieces 29A, 29B are connected to each other at a bending portion 36 disposed in the central portion of the canvas cloth piece 29, and formed symmetrically about the bending portion 36 as the axis. At the time of manufacturing the above tire antiskid device, the canvas cloth piece 29 is bent along a through hole 34 bored in the bending portion 36, whereby the respective canvas small pieces 29A, 29B are superimposed correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire anti-slip device attached to the outer periphery of a tire and a method for manufacturing the same.

[Prior Art] Among tire anti-slip devices for vehicles used on snow-covered roads, there is a tire anti-slip device called a ladder type.

As shown in FIG. 9, this type of tire slip prevention device 1
00 denotes tire anti-slip members 104 arranged at regular intervals on the road contact surface of the tire 102, and side ropes 10 connecting the tire anti-slip members 104 at regular intervals.
6.

By the way, as shown in FIG. 10, a reinforcing member 112 formed by stacking a plurality of reinforcing cloths 110 is embedded in the tire anti-slip member 104 in order to increase the rigidity of the tire anti-slip member 104.

Conventionally, when manufacturing this reinforcing member 112, predetermined pieces (in this example, two pieces) of reinforcing fabric are prepared from a reinforcing fabric 110 as shown in FIG. 11, which is punched into a substantially rectangular shape and placed in a bundle. The reinforcing member 112 is manufactured by taking out the reinforcing member 110 and then stacking the reinforcing member 110 as shown in FIG.

However, in the past, multiple reinforcing cloths 1 are separated.
10, in order to prevent the reinforcing cloths 110 from being overlapped with each other in a shifted state, the reinforcing cloths 110 are positioned and then overlapped.

As a result, before reinforcing cloth 110 is overlapped, reinforcing cloth 11
0 positioning is required, and the manufacturing efficiency of the reinforcing part shrine 112 is reduced, resulting in a problem that the manufacturing efficiency of the tire slip prevention device 100 is reduced.

Further, there is a problem that the cost of the tire slip prevention device 100 is increased by providing the step of positioning the reinforcing cloth 110.

[Problems to be Solved by the Invention] In consideration of the above facts, an object of the present invention is to provide a low-cost tire skid device and a method for manufacturing the tire skid device with high manufacturing efficiency.

[Means for Solving the Problem] The invention of claim (1) is a tire slip prevention device having a tire slip prevention member in which a sheet-like reinforcing member is embedded and arranged on the road surface contacting surface of the tire. The reinforcing member is characterized in that it is formed by folding and overlapping a plurality of continuously formed reinforcing sheet pieces of the same shape between adjacent reinforcing sheet pieces.

The invention of claim (2) is a method for manufacturing a tire anti-slip device having a tire anti-slip member in which a sheet-like reinforcing member is embedded and disposed on the road surface contacting surface of the tire, the method comprising reinforcing sheets of the same shape. A reinforcing sheet is formed in which pieces are continuous, and the reinforcing sheet pieces are overlapped by folding at the bends provided between adjacent reinforcing sheet pieces to form a reinforcing member, and this reinforcing member is placed in a mold. It is characterized in that the tire anti-slip member has a bottom shape.

[Function] In the invention of claim (1) having the above configuration, the reinforcing member embedded in the tire anti-slip member of the tire anti-slip device is formed by bending a reinforcing sheet in which reinforcing sheet pieces of the same shape are continuously formed. ing.

Therefore, there is no need to position the reinforcing sheet pieces to be overlapped with each other.

In the invention of claim (2) having the above configuration, a reinforcing sheet is formed in which reinforcing sheet pieces of the same shape are continuously formed. next,
A reinforcing member is formed by bending the continuous reinforcing sheet pieces and overlapping adjacent reinforcing sheet pieces. Then, the tire anti-slip member is manufactured by disposing this reinforcing member in a mold.

Therefore, when forming a reinforcing member, it is possible to overlap the reinforcing sheet pieces in a state in which they are accurately matched without having to set up a separate positioning process and position the reinforcing sheet pieces by simply folding the adjacent reinforcing sheets. I can do it.

[Example] FIG. 3 shows a partial perspective view of the tire anti-slip device 10 mounted on the tire 102.

The tire anti-slip device 10 includes a plurality of tire anti-slip parts 12 disposed on the outer peripheral surface of a tire 102, and side ropes 14 connecting the plurality of tire anti-slip members 12 at regular intervals. ing. As a result, as shown in FIG. 6, the tire slip prevention device 10 has a ladder-like structure.

As shown in FIG. 3, the tire anti-slip member 12 has a central portion 16 disposed on the road contact surface 102A of the tire 102.
and leg portions 18 respectively disposed on an outer surface 102B of the tire 102 in the vehicle width direction and an inner surface 102C of the tire 102 in the vehicle width direction. As a result, the tire anti-slip member 12 is formed in a substantially U-shape. A plurality of spike pins 24 (three in this embodiment) are implanted in the center portion 16 of the tire anti-slip member 12. These spike pins 24 increase the frictional resistance of the tire anti-slip member 12 against the snow or water surface by biting into the snow or water surface.

Further, the leg portion 18 is provided with a metal side rope support 2.
2 is installed. That is, the leg portion 18 has a notch 1.
8A is formed, and one end portion 22A of the side rope support 22 is locked to this arrow portion 18A. Further, the other end 22B of the side rope support 22 is caulked to fix the side rope 14.

The tire anti-slip member IO is made of natural rubber, thermoplastic urethane, thermoplastic elastomer such as thermoplastic rubber, and has flexibility.

As shown in FIGS. 4 and 5, the tire anti-slip member 12
A reinforcing member 26 is embedded in the tire anti-slip member 12 in order to increase its rigidity. As shown in FIG. 4, the reinforcing member 26 is arranged such that its longitudinal direction is the same as the longitudinal direction of the tire anti-slip member 12. As shown in FIG. Both longitudinal ends of this reinforcing member 26 (only one end is shown in FIG. 4) are connected to the leg portions 18 of the tire anti-slip member 12.
is folded back near the end to form a loop portion 26A. A metal bead 27 is inserted into the loop portion 26A to reinforce the leg portion 18 so that the side rope support 22 is securely engaged with the leg portion 18.

As shown in FIG. 1, the reinforcing member 26
It is formed from a canvas cloth piece 29 as a reinforcing sheet formed by punching out a piece of cloth 8.

This canvas cloth piece 29 is formed from canvas cloth pieces 29A and 29B as reinforcing sheet pieces having the same shape. Further, the canvas cloth pieces 29A and 129B are continuous by a folding portion 36 provided at the center of the canvas cloth piece 29. Therefore, the canvas cloth piece 29A and the campus cloth piece 29B are symmetrical about the folded portion 36 as an axis.

The canvas cloth 28 includes a canvas 30 formed by plain weaving a first cord 38A and a second cord 38B made of organic fibers such as natural fibers or synthetic fibers such as nylon, and a canvas 30 formed by plain weaving a first cord 38A and a second cord 38B made of organic fibers such as natural fibers or synthetic fibers such as nylon. sheet rubber 3
2A and sheet rubber 32B coated on the other side
It is formed from. As shown in FIG. 7(A), the sheet rubber 32A and the sheet rubber 32B have the same wall thickness.

As shown in FIG. 1, the length L1 of the bent portion 36 is preferably set to 50% to 80% of the length L2 in the longitudinal direction of the canvas cloth pieces 29A, 29B. .

As shown in FIGS. 1 and 2, a perforated through hole 34 is formed in the sheet rubber 32B corresponding to the bent portion 36. In this embodiment, the uncut portions located between the through holes 34 are spaced at intervals of 20+nm (
10m+++ to 30+++n spacing is preferable). This allows the canvas cloth piece 29 to be bent along the through hole 34 as shown in FIG. Therefore, the small piece of canvas cloth 29A and the small piece of canvas cloth 29B are overlapped without being separated from each other.

In addition, since the non-penetrating portions located between the through holes 34 are provided at intervals of 20+ nm, the first cord 38A1 and the second cord 38B constituting the canvas 30 are frayed and exposed compared to the past. It is possible to reduce the amount of As a result, the appearance quality of the tire anti-slip member 12 can be improved.

Further, in the embodiment, the shapes of the small canvas cloth pieces 29A and the small canvas cloth pieces 29B are formed into the shapes shown in FIG. You can.

Next, a method of manufacturing the tire slip prevention device 10 using an injection molding machine will be described.

First, a canvas cloth piece 29 is manufactured by punching out the canvas cloth 28 into a shape as shown in FIG. 1 using a press machine (not shown). At this time, the sheet rubber 3 corresponding to the bent portion 36 of the campus cloth small piece 29A and the campus cloth small piece 29B
A through hole 34 is simultaneously formed in 2B.

Next, the canvas cloth piece 29 is bent along the through hole 34 formed in the bending part 36. As a result, the small piece of canvas cloth 29A and the small piece of canvas cloth 29B are bonded together in an overlapping state, accurately corresponding to each other without coming apart.
A reinforcing member 26 is manufactured.

Therefore, unlike in the past, two separate pieces of reinforcing material are not selected and superimposed on each other, so there is no need to perform positioning work before superimposing them, and the reinforcing member 2
6 is reduced by about 30%.

Next, both longitudinal ends of the reinforcing member 26 are bent to form a loop portion 26A, and the bead 27 is inserted into the loop portion 26A.

Then, as shown in FIG. 8, the reinforcing member 26 is placed in a mold 50 applied to an injection molding machine (not shown). That is, this mold 50 has a first mold frame 52 and a second mold frame 5.
4, and the reinforcing member 26 is disposed within the recess 52A of the first mold frame 52 via a support member 58. Then, by combining the second mold frame 54 with the second mold frame 52, the reinforcing member 26 is disposed within the mold 50. Next, the molten thermoplastic elastomer is injected from the injection hole 56 of the mold 50. Thereby, the melted thermoplastic elastomer is filled into the recess 52A of the first mold frame 52 and the recess 54A of the second mold frame 54, and the tire anti-slip member 12 is molded.

Three spike pins 24 are implanted in the center portion 16 of this tire anti-slip member 12.

Next, the tire anti-slip device 10 is manufactured by attaching the side rope support 22 to which the side rope ↓4 is fixed to the leg portion ↓8 of the tire anti-slip member 12.

In addition, tire slip prevention device 1 made by vulcanization molding in a press
The manufacturing method of 0 will be explained.

First, a canvas cloth piece 29 is manufactured by punching out the canvas cloth 28 into a shape as shown in FIG. 1 using a press machine (not shown). At this time, the sheet rubber 32 corresponding to the bent portion 36 of the small canvas cloth piece 29A and the small canvas cloth piece 29B
A through hole 34 is formed in B at the same time.

Next, both longitudinal ends of the reinforcing member 26 are bent to form a loop portion 26A, and the bead 27 is inserted into the loop portion 26A.

Then, the reinforcing member 26 is sandwiched between one rubber and the other rubber (not shown). In this case, a spike pin 24 is provided between the reinforcing member 26 and one rubber. In addition, block-shaped rubber is disposed at both ends in the longitudinal direction of one rubber so as to be wrapped therein. Then, in this state, it is placed in a molding jig and vulcanized and bonded.

Next, the side rope support 22 to which the side rope 14 is fixed is attached to the leg portion 18 of the tire anti-slip member 12, thereby manufacturing the tire anti-slip device 10.

In this embodiment, the canvas cloth piece 29A and the canvas cloth piece 29B are continuously formed. Therefore, the campus cloth small piece 29A and the campus cloth small piece 29B
When overlapping the canvas cloth pieces 29A and 29B, the canvas cloth pieces 29A and the canvas cloth pieces 29B can be overlapped so that the sheet rubber 32A and the sheet rubber 32A are in contact with each other. Therefore, when the sheet rubber 32A and the sheet rubber 32B of the canvas cloth piece 29 have different wall thickness dimensions as shown in FIG. 7(B), the canvas cloth is Misalignment can be reliably prevented when the small piece 29A and the small canvas cloth piece 29B are placed together.

Further, as shown in FIG. 7(C), the first cord 38A
There is a canvas cloth 28 in which both the second cord 38B and the second cord 38B are inclined with respect to the longitudinal direction of the reinforcing member 26. The reason why such a canvas cloth 28 is formed is that the strength of the reinforcing member 26 can be increased by both the first cord 38A and the second cord 38B being inclined with respect to the longitudinal direction of the reinforcing member 26.

In addition, in the example, two pieces of canvas cloth 29A, 29
Although the reinforcing member 26 is formed from the campus cloth piece 29 made of B, the reinforcing member 26 may be formed by forming the canvas cloth piece 29 consisting of three or more pieces of canvas cloth and overlapping the canvas cloth pieces.

Further, instead of the perforated through hole 34 formed in the bent portion 36, a linear notch that does not penetrate may be formed in the sheet rubber 32B.

It should be noted that, as shown in the embodiment, it is preferable that the bent portion 36 be formed at the intermediate portion in the longitudinal direction of the can 34 bus cloth pieces 29A, 29B, but it does not necessarily have to be provided at the intermediate portion.

Further, in this embodiment, the canvas 30 is formed by plain weaving the first cord 38A and the second cord 38B, but it may be formed by a so-called blind weave.

In addition, although the tire slip prevention device and its manufacturing method were shown in this Example, it may be applied to other products such as belts and hoses.

[Effects of the Invention] As explained above, the tire anti-slip device and the method for manufacturing the tire anti-slip device according to the present invention eliminate the need for a positioning process when manufacturing the reinforcing member, thereby reducing product cost and improving tire slip prevention. This has an excellent effect of improving the manufacturing efficiency of the anti-slip device.

[Brief explanation of drawings]

1 to 8 show an embodiment of the tire slip prevention device and its manufacturing method according to the present invention, FIG. 1 is a front view of a piece of canvas cloth with a part cut away, and FIG. FIG. 3 is a partial perspective view of the tire anti-slip device attached to the tire, FIG. 4 is a partial sectional view of the tire anti-slip member, and FIG. 5 is the V of FIG. 4. -V line sectional view, FIG. 6 is an overall perspective view of the tire slip prevention device, FIG. 7(A) and FIG.
C) is a partially cutaway view of a piece of canvas cloth woven by intersecting the first cord and the second cord at an angle; FIG. 8 is a cross-sectional view of the mold with the reinforcing member installed; Figures 9 to 12
The figures show a conventional tire anti-slip device and its manufacturing method, FIG. 9 is a partial perspective view of the tire anti-slip device attached to a tire corresponding to FIG. 3, and FIG. 10 corresponds to FIG. 4. A partial sectional view of the tire anti-slip member, FIG. 11 is a front view of a piece of campus cloth with a part cut away, and FIG. 12 is a state diagram when reinforcing cloth is overlapped. 10...Tire anti-slip device, 12...Tire anti-slip member, 26...Reinforcement member, 29...Campus cloth piece (reinforcement sheet), 5 6 29A ・ 29B ・ 36 ・ ・ 50 ・ ・ ・Campus cloth small piece (reinforced sheet piece) ・Campus cloth small piece (reinforced sheet piece) ・Folded part, ・Mold (molding mold).

Claims (2)

[Claims] (1) A tire slip prevention device having a tire slip prevention member in which a sheet-like reinforcing member is embedded and disposed on the road surface contacting surface of the tire, the reinforcing member being a plurality of reinforcements of the same shape that are continuously formed. A tire slip prevention device characterized in that it is formed by folding and overlapping sheet pieces between adjacent reinforcing sheet pieces. (2) A method for manufacturing a tire slip prevention device having a tire slip prevention member in which a sheet-shaped reinforcing member is embedded and arranged on the road surface contacting surface of the tire, the reinforcing sheet having continuous reinforcing sheet pieces of the same shape. A reinforcing member is formed by overlapping the reinforcing sheet pieces by folding them at the bends provided between adjacent reinforcing sheet pieces, and this reinforcing member is placed in a mold to form a tire anti-slip member. A method of manufacturing a tire anti-slip device, characterized in that: