JP2002166479A - Method for connecting strip-like rubber material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for connecting a strip-like rubber material capable of strengthening a connecting press bonding force of a distal end of the rubber material, by increasing a contact area of a pair of combined members with a strip-like rubber material at a connecting time of the rubber material. SOLUTION: Reference characters 1A and 1B are the pair of combined members. In this embodiment, a pair of combined rollers each formed in a truncated conical section are used. Gears 1c and 1d capable of being engaged with each other are formed at an upper part. Spiral or circumferential grooves 5c and 5d are provided in a circumferential direction on a truncated conical oblique surface part. Reference character W is the strip-like rubber material such as a carcass or the like constituted of a thin rubber or the like, reference numeral 3 is a support member for supporting the material W. When ends Wa, Wb of the material W are connected, that is, butt spliced by a toe-in roller unit, a rubber-like elastic material 4 constituted of sponge, rubber, urethane or the like easy to be controlled in a hardness is arranged at the material side of a lower plate part of the supporting side for passing the pair of the rollers 1A and 1B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a band-shaped rubber material, and more particularly, to increasing the contact area between a pair of shift members and the band-shaped rubber material, and increasing the pressing force at both ends of the band-shaped rubber material. The present invention relates to a bonding method of a belt-like rubber material that can be performed.

[0002]

2. Description of the Related Art Conventionally, as a method of joining end portions of a band-shaped rubber material such as a carcass material used as a tire constituent material, as shown in FIGS. 4 and 5, for example, a pair of bevel gears 1a, 1b, , A pair of truncated conical shifting rollers 2
a, 2b are rotated at a predetermined angle θ in the traveling direction, and the end portions Wa, 2b of the band-shaped rubber material W on the receiving member 3 are rotated.
A toe-in roller device or a zipper device for attracting and joining Wb is known.

In the toe-in roller device or the zipper device as described above, a pair of bevel gears 1a and 1b are more effective for reliably synchronizing the left and right movements. Further, in order to increase the frictional force with the material and more effectively use the pulling force, circumferential grooves 5a and 5b are provided in the truncated cone-shaped inclined surface portion in contact with the belt-shaped rubber material W, Ingenious measures such as using a material with a large coefficient of friction.

[0004] A pair of bevel gears 1a and 1b and shift rollers 2a and 2b used in these devices are shown in FIG.
As shown in (a) and (b), the shift amount L1 of the end portions Wa and Wb of the band-shaped rubber material W changes depending on the contact area of the bevel gears 1a and 1b and the rollers 2a and 2b inclined by the predetermined angle θ. Let it.

[0005]

The contact area of the belt-shaped rubber material W in the joining method as described above is determined by the bevel gear 1a,
1b and the rollers 2a and 2b bite into the belt-shaped rubber material W. As shown in FIGS. 6 (a) and 6 (b), in the case of a material such as a steel carcass, which has a steel wire in the belt-shaped rubber material W and is hard to be dented, the contact area becomes small, and as a result, the material is brought closer. There has been a problem that the amount L1 is reduced, and the pressing force of the belt-shaped rubber material W is easily reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to increase the contact area between a pair of shift members and a band-shaped rubber material at the time of bonding the band-shaped rubber material, thereby increasing the bonding pressure force at the end of the band-shaped rubber material. To provide a joining method.

[0007]

According to the present invention, in order to achieve the above-mentioned object, a rubber-like elastic material provided on a receiving member below a joining portion is joined when joining end portions of a belt-like rubber material by a pair of shift members. The gist of the present invention is that the contact area between the end portion of the belt-shaped rubber material and the shift member is enlarged by pressing the rubber member so as to be pressed by pressure.

As the pair of shift members, a shift roller having a truncated conical cross section or a shift roller having a bevel gear shape is preferable.

The amount by which the end portion of the band-shaped rubber material is shifted by the pair of shift members determines the contact position based on the inclination angle of the shift member. The adjustment of the area is performed by adjusting the hardness of the rubber-like elastic material provided on the receiving member and the amount of depression caused by the pressing force of the pair of shift members.

As described above, by disposing the rubber-like elastic material which is elastically deformed by the pressing force of the shift member on the receiving member below the joint portion of the belt-like rubber material, the pair of shift members and the band-like member are joined when the belt-like rubber material is joined. Increase the contact area with the rubber material,
The contact crimping force at the end of the band-shaped rubber material can be strengthened, and the contact area is formed by the recess of the rubber-like elastic material instead of the recess of the band-shaped rubber material, so it is controlled by the pressing force according to the band-shaped rubber material It is something that can be done.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The same components as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a partially enlarged sectional view of a joining apparatus for carrying out the method for joining a belt-shaped rubber material according to the present invention, and FIG. 2 is a partial side view of the joining apparatus. In this embodiment, a pair of shift rollers formed in a truncated conical cross section is used, and gears 1c and 1d that can mesh with each other are formed on the upper portion. Has spiral or circumferential grooves 5c and 5d formed in the circumferential direction.

W is a band-shaped rubber material such as a carcass material made of thin rubber or the like, 3 is a receiving member for supporting the band-shaped rubber material W, and below the joint between the end portions Wa and Wb of the band-shaped rubber material W, A rubber-like elastic material 4 is provided.

That is, when butt splicing is performed by the toe-in roller device, a sponge, rubber, urethane, or the like, whose hardness is easily controlled, is provided on the material side of the lower plate portion on the receiving side through which the pair of shift rollers 1A, 1B pass. It is configured.

The rubber-like elastic material 4 has such a surface state that the coefficient of friction with the belt-like rubber material W is small so that the terminal portions Wa and Wb of the belt-like rubber material W can easily move in the pressure-bonding direction. For example, it is desirable to use silicon rubber, or to use a material on which only silicon rubber or Teflon (registered trademark) tape is stuck.

Next, a method for joining the belt-like rubber material using the above-described joining apparatus will be described.

First, when the end portions Wa and Wb of the belt-shaped rubber material W on the receiving member 3 are joined by a pair of rotatable driving members 1A and 1B having a truncated conical cross section, as shown in FIG. The rubber-like elastic material 4 provided on the receiving member 3 below the joint by the pair of shift members 1A and 1B is dented by the joint pressing force as shown in FIG. The contact area is expanded and crimped.

The shift amount L2 of the ends Wa and Wb of the belt-shaped rubber material W by the pair of shift members 1A and 1B is shown in FIG.
As shown in the explanatory diagram of (b), the contact position is determined by the inclination angle θ of the shift members 1A and 1B, and the adjustment of the contact area between the pair of shift members 1A and 1B and the belt-shaped rubber material W The adjustment is made by the hardness of the rubber-like elastic material 4 provided on the receiving member 3 and the amount of depression by the pressing force of the pair of shift members 1A and 1B.

That is, when the pair of shift members 1A and 1B are pressed, the rubber band elastic material 4 elastically deforms the band-like rubber material W as shown in FIG. 2, and the shift members 1A and 1B and the band-like rubber material W Of the contact area of FIG.
As shown in (2), the amount L2 to be shifted increases, and the pressing force of the end portions Wa and Wb of the belt-shaped rubber material W increases.

As described above, the rubber-like elastic material 4 which is elastically deformed by the pressing force of the shift members 1A and 1B is disposed on the receiving member 3 below the joint of the belt-like rubber material W, so that the belt-like rubber material W When joining the terminal parts Wa and Wb, the contact area between the pair of shift members 1A and 1B and the band-shaped rubber material W is increased,
The contact pressure can be increased at the end portion of the belt-shaped rubber material W, and the contact area is formed by the recess of the rubber-like elastic material 4 instead of the recess of the belt-shaped rubber material W. It can be controlled by pressing force.

In this embodiment, the pair of shift members 1A and 1B are used as gears 1c and 1 that can mesh with each other.
d and a pair of shift rollers formed in a circular truncated cone shape having spiral grooves 5c and 5d in the circumferential direction. In order to reliably synchronize left and right movements, the pair of rollers are used. In order to increase the frictional force between the bevel gear and the material and to use the pulling force more effectively, a circumferential groove is provided on the inclined surface of the truncated cone, or a material with a large friction coefficient is used. It is effective to use the used shifting roller.

[0023]

According to the present invention, when the end portions of the band-shaped rubber material are joined by the pair of shift members as described above, the rubber-like elastic material provided on the receiving member below the joint is depressed by the joining pressing force. Since the contact area between the end portion of the band-shaped rubber material and the shift member is increased and the pressure is applied, the contact area between the pair of shift members and the band-shaped rubber material is increased when the band-shaped rubber material is joined, and This has the effect of increasing the bonding pressure at the end.

The amount of shift L2 of the end portion of the band-shaped rubber material by the pair of shift members determines the contact position based on the inclination angle θ of the shift member, and the contact area between the pair of shift members and the band-shaped rubber material. Can be adjusted by the hardness of the rubber-like elastic material provided on the receiving member and the depression amount of the pressing force of the pair of shift members.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view of a joining apparatus for carrying out a method for joining a belt-shaped rubber material of the present invention.

FIG. 2 is a partial side view of FIG.

FIG. 3A is an explanatory view showing an operation state of a rubber-like elastic material at the time of joining a terminal portion of a band-shaped rubber material by a pair of shifting members, and FIG. It is explanatory drawing of the amount of shift at the time of joining.

FIG. 4 is a partially enlarged cross-sectional view of a joining device for performing a conventional method for joining a belt-shaped rubber material.

FIG. 5 is a partial side view of FIG. 4;

6A is an explanatory view showing an operation state of a rubber-like elastic material at the time of joining a terminal portion of a belt-shaped rubber material by a pair of conventional shifting members, and FIG. It is explanatory drawing of the shift amount at the time of joining of the terminal part of a material.

[Explanation of symbols]

 1A, 1B A pair of shifting members 1c, 1d Gear 3 Receiving member 4 Rubber-like elastic material 5a, 5b Spiral or circumferential groove W Band-shaped rubber material Wa, Wb Terminal L1, L2 Shifting of terminal of band-shaped rubber material amount

Claims (5)

[Claims] 1. A joining of a band-shaped rubber material which is pressure-bonded to a terminal portion of the band-shaped rubber material on a receiving member by moving a pair of rotatable driving members along the terminal portion while pulling the terminal portion. In the method, when joining the end portions of the belt-shaped rubber material by the pair of shifting members, the rubber-like elastic material provided on the receiving member below the joining portion is depressed by a joining pressing force, and the end portion of the strip-shaped rubber material and the shifting member are joined. A method of joining a band-shaped rubber material to be crimped while increasing the contact area with the belt. 2. The method according to claim 1, wherein the pair of shift members are shift rollers having a truncated conical cross section. 3. The method according to claim 1, wherein the pair of shift members are bevel gear-shaped shift rollers. 4. The bonding method for a band-shaped rubber material according to claim 1, 2, or 3, wherein the amount of shift of the end portion of the band-shaped rubber material by the pair of shift members determines a contact position by an inclination angle of the shift member. . 5. The adjustment of the contact area between the pair of shift members and the band-shaped rubber material is performed by adjusting the hardness of the rubber-like elastic material provided on the receiving member and the amount of depression caused by the pressing force of the pair of shift members. The method for bonding a belt-shaped rubber material according to 1, 2, 3, or 4.