JPH02175234A - Press bonding roller - Google Patents

Abstract

PURPOSE:To perform press bonding reasonably and certainly by discharging the air accumulated in the bonding part of a terminal part by following the unevenness of the bonding part of the terminal part of an unvulcanized rubber sheet by a split ring member having rigidity to perform press bonding. CONSTITUTION:A press bonding roller 1 is mounted to the leading end of a holder 5 formed so as to have an almost U-shape cross-section in a freely rotatable manner through a pin 6 and the holder 5 is mounted to a support bar 7 formed into an almost L-shape in a freely detachable manner while the support bar 7 is connected to the air cylinder 8 mounted on a tire molding machine to expand and contract. A roller main body 4 is constituted by fitting a cylindrical member to a support shaft through a bearing in a freely rotatable manner and a vulcanized rubbery elastomer sheet is laminated to the outer peripheral surface of said cylindrical member over the almost entire region thereof in the outer peripheral longitudinal direction of the cylindrical member. A plurality of annular ring members 12 formed of a metal material are fitted to the outer periphery of the cylindrical member in a freely rotatable manner over the almost entire region of the rubbery elastomer sheet 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure roller, and more specifically, for example, a pressure roller for pressure-bonding the irregularities of the joint end portion of an unvulcanized rubber sheet wrapped around a tire forming drum. It's about rollers.

[Conventional technology]

Conventionally, during tire molding, the surface of the joints of the terminal parts of multiple unvulcanized rubber sheets, etc. that are wrapped around the forming drum has an uneven surface because the terminal parts overlap each other. The joints are crimped.

[Problem that the invention seeks to solve]

However, conventional pressure rollers have been integrally molded into a cylindrical shape from a metal material, or rubber pressure rollers have been integrally molded from a rubber material. When crimping is performed, the pressure roller does not come into contact with the concave surface of the uneven surface, and air remains between the materials on the concave surface, causing problems such as vulcanization failure due to air obstruction. There was a problem in that an air discharge effect could not be expected with the integral pressure roller.

Therefore, recently, as disclosed in Japanese Patent Application Laid-Open No. 62-184844, a crimping sponge roller that is divided into a plurality of parts via bearings on the outer periphery of the shaft and each having a different hardness is used. is proposed.

However, in the case of a crimping roller using this divided crimping sponge roller, the unevenness of the end joint of the unvulcanized rubber sheet etc. and the hardness of the sponge roller do not match well. There is a problem in that it is difficult to effectively discharge air within the joint, and if a sponge roller is used, the sponge may deteriorate (sticky) or
There is a high possibility that the split sponges will stick together due to swelling, etc., and furthermore, part of the sponge will break off during use, and the broken part will stick to the unvulcanized rubber and get mixed into the tire, which will affect the quality and performance of the tire. There was a problem.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and it is possible to effectively discharge the air in the end joints of unvulcanized rubber sheets, etc., and also prevent deterioration of the pressure roller. It is an object of the present invention to provide a pressure roller that does not break and can easily and reliably perform pressure bonding at an end joint portion.

[Means to solve the problem]

In order to achieve the above object, the present invention rotatably attaches a cylindrical member having a vulcanized rubber elastic sheet affixed to the outer circumferential surface to the tip of a holder having a substantially U-shaped cross section. The gist is that a plurality of ring members having a predetermined thickness are rotatably fitted over substantially the entire length in the longitudinal direction.

[Operation of the Invention] The present invention is constructed as described above, and is crimped by following the irregularities of the end joint of an unvulcanized rubber sheet etc. with the divided ring member having rigidity. The air accumulated in the joint can be easily discharged, and the terminal joint can be crimped easily and reliably.

[Embodiments of the invention] The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 is a perspective view showing how the pressure roller 1 according to the present invention is used, and FIG. 2 is a front view of the pressure roller 1. As shown in FIG.
The uneven portion of the terminal joint portion 3a of a rubber-like elastic sheet 3 such as an unvulcanized rubber elastic sheet wrapped around the outer peripheral surface of the rubber elastic sheet 3 is crimped.

This pressure roller 1 is rotatably attached to the tip of a holder 5 having a roller main body 4 formed in a substantially U-shape in cross section via a pin 6 or the like. The support bar 7 is removably attached to the support bar 7.
is the air cylinder 8 attached to the tire molding machine.
It is connected to and expands and contracts.

The roller main body 4, as shown in FIGS. 3 to 5,
A cylindrical member 10 is rotatably fitted onto a support shaft (not shown) via a bearing 9, and the outer peripheral surface of this cylindrical member 10 has a JIS hardness of 30 to 70. A vulcanized rubber elastic sheet 11 having a thickness of l-5aim is pasted over substantially the entire length of the outer circumference of the cylindrical member 10 in the longitudinal direction.

Moreover, the outer periphery of this cylindrical member 10 has a thickness of 1 to 5 ms.
, inner diameter 15 m ~ 40 a, outer diameter 20+asxlO
A plurality of annular ring members 1 formed of a metal material of Om
2 is rotatably fitted over substantially the entire area of the rubber-like elastic sheet 3.

In this case, in order to make the movement of each ring member L2 smooth, the number of ring members 12 is reduced by 1 to 2 with respect to the total medium dimension of the cylindrical member 1O, and the inner diameter of the ring member 12 is made from vulcanized rubber. Cylindrical member lO to which elastic sheet 11 is attached
It is important to make the outer diameter larger by about 2 to 110ff1.

When the pressure roller 1 configured as described above is crimped as shown in FIG. 1, the crimping follows the irregularity level difference of 0.5 tm to 2.5 wm of the end joint portion 3a of the rubber-like elastic sheet 3. Therefore, the air accumulated in the recess in the terminal joint can be easily discharged, and the terminal joint can be crimped easily and reliably.

In the above embodiment, the pressure roller according to the present invention is used to pressure the end joint portion 3a of the rubber-like elastic sheet 3 that is wrapped around the tire forming drum 2, but the present invention is not limited thereto. It is also possible to carry out this method when joining the end portions of sheet materials that have the same structure.

〔Effect of the invention〕

In this invention, a cylindrical member having a vulcanized rubber elastic sheet pasted on its outer peripheral surface is rotatably attached to the tip of a holder having a substantially U-shaped cross section as described above, and Since a plurality of ring members having a predetermined thickness are rotatably fitted over almost the entire area of the sheet, air in the end joints of unvulcanized rubber sheets, etc. can be effectively discharged, and the crimping This has the advantage that the rollers do not deteriorate or break, and the terminal joints can be crimped easily and reliably.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how the pressure roller according to the invention is used, FIG. 2 is a front view of the pressure roller, FIG. 3 is a side view of a cylindrical member fitted with a ring member, and FIG. 4 is a ring member. FIG. 5 is a cross-sectional view of the cylindrical member fitted with the members, and FIG. 5 is a front view of FIG. 4. l... Pressure roller, 5... Holder lO... Cylindrical member, 11... Vulcanized rubber elastic sheet, 12...
ring member.

Claims (1)

[Claims] A cylindrical member having a vulcanized rubber elastic sheet affixed to the outer peripheral surface is rotatably attached to the tip of a holder having a substantially U-shaped cross section, and substantially the entire length of the outer periphery of the cylindrical member in the longitudinal direction,
A pressure bonding roller characterized in that it is constructed by rotatably fitting a plurality of ring members each having a predetermined thickness.