JP2003080611A - Sheetlike material joining method and joining apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheetlike material joining method always setting the joining parts of the terminal parts of a sheetlike material to a constant position to more certainly and accurately join the joining parts under pressure and capable of performing automatic pasting without using labor, and a joining apparatus therefor. SOLUTION: The joining parts 5a and 5b of drum segments 3a and 3b are constituted as comb tooth-like uneven locking parts 6x and 6y capable of being locked with each other. At the time of opening of a molding drum 3, the uneven locking parts 6x and 6y cross each other so as not to form a perfect space part. A partition plate 7 inserted in the pressure bonding center part Q-Q of the space S between the terminal parts Wa and Wb of the sheetlike material W so as to be able to advance and retreat when the terminal parts Wa and Wb of the sheetlike material W are abutted, a guide member 8 for guiding the terminal parts Wa and Wb of the sheetlike material W so as not to float them on the joining parts 5a and 5b of the molding drum 3 and a pressure bonding means 9 for bonding the terminal parts Wa and Wb of the sheetlike material W under pressure to join them are arranged above the joining parts 5a and 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method and a joining apparatus for joining end portions of unvulcanized sheet-like materials such as carcass members used as tire constituent materials, and more particularly to joining sheet-like materials. The present invention relates to a sheet-like material joining method and a joining apparatus for the sheet-like material, which can be butt-joined accurately with a fixed crimping position in a state where the end portions are aligned with each other and can be automatically attached.

[0002]

2. Description of the Related Art Conventionally, in a tire molding process, an unvulcanized carcass or other sheet material is wound around a cylindrical molding drum for butt joining (referred to as butt splice). There is.

However, when the sheet-shaped material is wound around the forming drum, the end portions are likely to overlap (wrap) or open due to a subtle difference in the length of the member. I had to work.

As a butt-joining device for carcass members, there is a device called a toe-in roller device. In this toe-in roller device, both ends of two carcass members that are butted or slightly opened are beveled. It is a device that presses while attracting by two rollers. By the way, when the end portions of the sheet-shaped material as described above are butted and crimped, in order to always keep the crimping position constant, the gap between the end portions of the sheet-shaped material is specified before the end portions of the sheet-shaped material are butted. A method has been proposed in which a member is inserted and abutted against each other, and then a terminal portion of a sheet-shaped material is pressure-bonded (Japanese Patent Laid-Open No. 3-97532).

[0005]

However, the conventional crimping method as described above uses a multi-divided (3 or more divisions) forming drum, and the drums are abutted against each other in order to abut the end portions of the sheet-shaped material. In order to move the segments in the radial direction, it is necessary to loosen the sheet material around the entire circumference and to provide a gap at the portion of the forming drum that contacts the joint, which results in the sheet material sagging and the joint becoming unstable. However, there is a problem that the device becomes complicated because the gap defining portion is incorporated in the vicinity of the crimping device.

An object of the present invention is to make the joint portion of the end portion of the sheet-like material always at a fixed position so that the joint portion can be crimped more reliably and accurately, and the automatic sticking can be performed without human intervention. It is an object of the present invention to provide a sheet-shaped material joining method and a joining apparatus therefor.

[0007]

In order to achieve the above object, the present invention provides a method for joining sheet-like materials according to the present invention.
To the molding support device in which the joining portion is in the open state, the sheet-shaped material that has been cut to a predetermined length is attached so that the joining end portion is in the open state at the joining portion, and the sheet-like material end portions in the open state are bonded to each other. Inserting a partition plate into the crimping center part, abutting the sheet-shaped material end parts while sandwiching the partitioning plate while closing the joint part of the molding support device, retracting the partition plate from the crimping center part, and then abutting The gist of the invention is to join the sheet-shaped materials by crimping the joining end portions of the sheet-like material with a crimping means.

When the partition plate is inserted into the crimping center portion between the sheet-shaped material end portions, the guide member guides the sheet-shaped material end portions so as not to float above the joints of the molding and supporting device, and the partition plate is attached. It is also possible to retract the guide member after retracting it from the crimping center portion.

As described above, when joining the sheet-shaped material end portions, the partition plate is inserted into the crimping center portion, and the sheet-shaped material end portion is guided so as not to be lifted up by the guide member. The joint portion of the end portion of the strip-shaped material can be always located at a fixed position, and the crimping of the joint portion can be performed more reliably and accurately.

The sheet-shaped material joining apparatus of the present invention is provided with a pair of molding supporting devices whose joints can be opened and closed, and when a terminal portion of the sheet-shaped material is abutted on the joining part of the molding supporting apparatus. , A partition plate insertable into the crimping center portion between the sheet-like material end portions, and an advancing / retreating guide member for guiding the sheet-like material end portion so as not to float above the joint of the molding support device, and the sheet-like material. The gist of the present invention is that it comprises crimping means for crimping and joining the end portions of the material.

The molding support device is a two-division type molding drum or a two-division type horizontal support plate which can be opened and closed via a hinge. The joint portion of the horizontal support plate can be brought into contact with or separated from the horizontal support plate. Then, the joint portion of the molding support device is configured as a comb tooth-shaped concave-convex engagement portion.

Further, the partition plate and the guide member are constructed so as to advance and retreat from the outside of the forming and supporting device through a cylinder, and the crimping means is composed of a pair of beveled rollers.

As described above, the apparatus for joining sheet materials is
A pair of forming and supporting devices configured to open and close the joints, and a forward / backward insertion into the crimping center part between the sheet-like material end portions when the end portions of the sheet-like material are abutted on the joints of the forming and supporting device. It is composed of a partition plate and a guide member capable of advancing and retracting, which guides the end portion of the sheet-shaped material so as not to float above the joint portion of the molding support device, and crimping means for crimping and joining the end portion of the sheet-shaped material. By doing so, it is possible to more reliably and accurately bond the bonded portion, and it is possible to perform automatic bonding without manual intervention.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a joining apparatus for carrying out the method for joining sheet-like materials according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a part of FIG. An enlarged plan view is shown, and the joining apparatus 1 according to the first embodiment of the present invention uses, as a pair of molding supporting devices, a cylindrical molding drum 3 which is divided into two parts and which can be opened and closed via a hinge 2. The drum segments 3a and 3b of the molding drum 3 are configured to be openable and closable with the hinge 2 as a fulcrum by opening and closing cylinders 4a and 4b arranged in the molding drum 3.

As shown in FIG. 3, the joint portions 5a and 5b of the drum segments 3a and 3b are formed as comb tooth-shaped concave and convex engaging portions 6x and 6y, respectively, to open the molding drum 3. At times, the concave and convex engaging portions 6x and 6y are configured so as not to intersect with each other to form a complete space portion. Further, the open / close cylinders 4a, 4b are provided with the drum segments 3a, 3b.
The drum is opened and closed in three stages: full opening of drum, middle opening of drum (position where forming drum becomes a perfect circle), and closing of drum.

On the joining portions 5a and 5b of the molding drum 3,
When the end portions Wa and Wb of the sheet-shaped material W are butted against each other, the partition plate 7 that can be inserted into the crimping center portion Q-Q between the sheet-shaped material end portions S and the end portions Wa and Wb of the sheet-shaped material W are inserted. A guide member 8 capable of advancing and retracting so as not to float above the joining portions 5a and 5b of the forming drum 3, and a crimping means 9 for crimping and joining the end portions Wa and Wb of the sheet material W are installed. ing.

The partition plate 7 and the guide member 8 are arranged on the cylinder 1 from the outside of the joint portions 5a and 5b of the molding drum 3.
0a, 10b, 10c are configured to advance and retreat, and the crimping means 9 is a pair of beveled rollers 11a, 11 rotatably driven by a rotation driving means (not shown).
b (toe roller).

In the first embodiment, as the pair of molding supporting devices, the two-divided molding drum 3 configured to be openable / closable via the hinge 2 is used, but the present invention is not limited to this embodiment. It is also possible to use a two-part horizontal support plate.

Further, even when this two-division type horizontal support plate is used, it is possible to make the joints abuttable or separable and form the joints into comb-shaped concave and convex engaging portions. The same as the molding drum 3 of the first embodiment.

Next, a method for joining sheet materials will be described with reference to FIG.
A description will be given with reference to (a) to (f).

First, as shown in FIG. 4 (a), the joining portions 5a, 5b of the drum segments 3a, 3b of the molding drum 3 are joined.
In the state where the clearance S of the contact portion in 4 is provided with about 4 to 5 mm, that is, in the state where the drum is fully opened, the unvulcanized sheet that has been cut to a predetermined length on the joining portions 5a and 5b of the drum segments 3a and 3b. The end portions Wa and Wb of the strip-shaped material W are attached so as to be in an open state.

As shown in FIG. 4B, the partition plate 7 is inserted into the crimping center portion QQ between the end portions of the sheet-shaped material in the opened state through the cylinders 10a, 10b and 10c and guides are provided. The member 8 is also lowered, and as shown in FIG. 4C, the sheet-shaped material W is moved by the left and right guide members 8.
The end portions Wa and Wb of the molding drum 3 are joined to the joining portion 5 of the molding drum 3, respectively.
Guide them so that they do not rise above a and 5b.

Joining portion 5 of the drum segments 3a and 3b
The sheet-shaped material ends Wa and Wb are butted against each other with the partition plate 7 sandwiched between them while keeping a and 5b in a closed state slightly closed from the true circle position. The crimping center is formed by a pair of rollers 11a,
Accurately match the core of 11b. And a pair of rollers 1
Ensure proper clearance for hanging 1a and 11b.

Further, the guide member 8 has the end portions Wa, Wa of the sheet-shaped material W when the sheet-shaped material end portions Wa, Wb are joined.
Wb is guided so as not to float, and when the partition plate 7 is raised, the end portions Wa, W of the sheet material W are
It functions as a pressing member so that the joint portion of b does not rise.

Sheet material end W with the partition plate 7 in between
After a and Wb are abutted, as shown in FIG.
After retracting the partition plate 7 from the crimping center part Q-Q,
The guide member 8 is also retracted, and thereafter, as shown in FIG. 4E, the joining end portion W of the abutted sheet-shaped materials W is joined.
a and Wb are a pair of beveled rollers 11a of the crimping means 9,
By pressing and joining at 11b, the center of the crimping means 9 coincides with the position where the partition plate 7 is installed, so that the center can be surely aligned.

After the joining work is completed, the molding drum 3 is returned to the true circle position (middle open) to complete the annular member. (Fig. 4
(F)).

In this way, the terminal portion W of the sheet material W is
When joining a and Wb, since the partition plate 7 is inserted into the crimping center portion Q-Q and the guide members 8 guide the end portions Wa and Wb of the sheet-shaped material W so as not to rise, Terminal portions Wa, W of the sheet material W
The joint portion b can be always located at a fixed position, and the crimping of the joint portion can be performed more reliably and accurately.

In the above-described embodiment, as the pair of molding supporting devices, the cylindrical molding drum 3 divided into two parts which can be opened and closed via the hinge 2 is used to manufacture an annular member. Although the method and apparatus for joining the terminal portions of the sheet-shaped material have been described, the present invention is not limited to this embodiment, and a method of joining the sheet-shaped terminal portions using a two-divided horizontal support plate as a pair of molding supporting devices. It is also possible to apply to the device.

[0030]

Since the present invention is constructed as described above, it has the following excellent effects. (a) .When abutting the ends of the sheet material, the partition plate that serves as the reference is placed on the crimping center, so the joint is always in a fixed position and the crimping of the joint is performed more reliably. You can (b) .By combining the partition plate and the guide member, it is possible to prevent the positions of both ends of the material from shifting when the sheet-shaped material ends are abutted or when the partition plate is removed. Crimping can be performed more reliably. (c). Since the divided drum segment is opened and closed via a hinge, it is possible to perform crimping of the joint portion with almost no deformation except for the vicinity of the joint portion of the sheet-shaped material. (d) .By intersecting both the drum segments of the portion corresponding to the joining portion of the forming drum with the comb-shaped concave and convex engaging portions,
Both end portions of the joining portion are stable without forming the open portion, and stable butt joining can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a bonding apparatus for carrying out a method for bonding sheet-like materials according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partially enlarged plan view taken along the line AA of FIG.

4A to 4E are process explanatory views of a method for joining sheet materials.

[Explanation of symbols]

1 joining device 2 hinge 3a, 3b molding drum 4a, 4b open / close cylinder 5a, 5b joint 6x, 6y Comb-shaped concave and convex engaging portions 7 Partition plate 8 Guide member 9 Crimping means 10a, 10b, 10c cylinders 11a, 11b rollers W Sheet material Wa, Wb Terminal part S Sheet-like material between terminal parts Q-Q crimping center

Claims (8)

[Claims] 1. A molding support device having a joint part opened,
Attached so that the joining end portion of the sheet-shaped material that has been cut to a predetermined length is opened at the joining portion, and insert the partition plate into the crimping center portion between the sheet-shaped material end portions in the opened state, While closing the joint part of the support device, sandwich the partition plate and butt the sheet-shaped material end parts,
A method of joining sheet-shaped materials, which comprises retreating a partition plate from a pressure-bonding center portion, and then pressure-bonding the joined terminal ends of the sheet-shaped materials that have been abutted by a pressure-bonding means. 2. When the partition plate is inserted into the crimping center portion between the sheet-shaped material end portions, a guide member guides the sheet-shaped material end portions so as not to float above the joints of the molding and supporting device, and the partitioning is performed. The guide member is retracted after the plate is retracted from the crimping center portion.
The method for joining sheet-like materials according to. 3. A pair of molding and supporting devices whose joints can be opened and closed, and a crimping center between the end portions of the sheet-shaped material when the ends of the sheet-shaped material are abutted on the joints of the molding and supporting device. A guide member for advancing and retracting a partition plate and a sheet-shaped material that are inserted into the end portion of the sheet-shaped material and a guide member that guides the terminal portion of the sheet-shaped material so that they do not float above the joining portion of the molding support device An apparatus for joining sheet-like materials, which comprises: 4. The molding support device is a two-divided molding drum configured to be openable and closable via a hinge.
The apparatus for joining sheet-like materials according to. 5. The apparatus for joining sheet-like materials according to claim 3, wherein the forming and supporting device is a two-divided type horizontal supporting plate, and the joint portion of the horizontal supporting plate is configured to be capable of abutting or separating. 6. The band-shaped material bonding apparatus according to claim 3, 4 or 5, wherein the bonding section of the molding support apparatus is a comb tooth-shaped concave-convex engagement section. 7. The apparatus for joining strip-shaped materials according to claim 3, 4, 5 or 6, wherein the partition plate and the guide member are configured to advance and retreat from the outside of the forming and supporting device via a cylinder. 8. The apparatus for joining strip-shaped materials according to claim 3, 4, 5, 6 or 7, wherein the pressure-bonding means comprises a pair of bevel-shaped rollers.