胶粘膜粘合方法和胶粘膜粘合设备(美国专利9227812).doc

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United States Patent
9,227,812
Degawa
January 5, 2016

Adhesive sheet joining method and adhesive sheet joining apparatus
Abstract
While a transporting unit transports an adhesive sheet attached to a separator larger than the adhesive sheet, a chuck member on a tip of a swing arm of a separating unit holds a portion of the separator protruding from an end of the adhesive sheet. Under such a condition, the chuck member moves in a direction crossing a transportation direction of the adhesive sheet, and the transporting unit moves in the transportation direction in synchronization with the chuck member while folding back the separator at an end of a supporting plate contacting the separator as a starting point. Accordingly, the separator is separated from the adhesive sheet. The transporting unit transports while holding the adhesive sheet with the separator separated therefrom to join the adhesive sheet to a workpiece.

Inventors:
Degawa; Osamu (Ibaraki, JP)
Applicant:
Name
City
State
Country
Type

NITTO DENKO CORPORATION

Ibaraki-shi, Osaka

N/A

JP

Assignee:
NITTO DENKO CORPORATION (Osaka, JP)
Family ID:
1000001563225
Appl. No.:
14/430,043
Filed:
October 31, 2013
PCT Filed:
October 31, 2013
PCT No.:
PCT/JP2013/079595
371(c)(1),(2),(4) Date:
March 20, 2015
PCT Pub. No.:
WO2014/069586
PCT Pub. Date:
May 08, 2014

Prior Publication Data

Document Identifier
Publication Date

US 20150251870 A1
Sep 10, 2015

Foreign Application Priority Data

Nov 5, 2012 [JP]

2012-243481

Current U.S. Class:
1/1
Current CPC Class:
B65H 37/04 (20130101); B32B 37/0046 (20130101); B32B 37/12 (20130101); B32B 37/18 (20130101); B32B 38/10 (20130101); B32B 38/18 (20130101); B65H 37/00 (20130101); B65H 41/00 (20130101); B32B 2405/00 (20130101); B65H 2301/51122 (20130101)
Current International Class:
B29C 65/48 (20060101); B32B 37/00 (20060101); B65H 41/00 (20060101); B65H 37/00 (20060101); B32B 37/18 (20060101); B65H 37/04 (20060101); B32B 38/18 (20060101); B32B 37/12 (20060101); B32B 37/26 (20060101); B32B 38/10 (20060101)
Field of Search:
;156/249,289,701,714,719,391,537,538,750,767

References Cited [Referenced By]

U.S. Patent Documents

5078670
January 1992
Volkert
5181901
January 1993
Volkert
5676789
October 1997
Hamamura
6149758
November 2000
Tsujimoto
6616799
September 2003
Tsujimoto
7521384
April 2009
Kanazawa
7823619
November 2010
Yoshizawa
2005/0103422
May 2005
Kawaguchi
2012/0298285
November 2012
Kurimuru et al.

Foreign Patent Documents

2004-217376

Aug 2004

JP

2005-139218

Jun 2005

JP

2010-024038

Feb 2010

JP

2010-168214

Aug 2010

JP

2011/086626

Jul 2011

WO

2011/089963

Jul 2011

WO

Other References

International Search Report for PCT/JP2013/079595 dated Jan. 14, 2014. cited by applicant.

Primary Examiner: Chan; Sing P
Attorney, Agent or Firm: Sughrue Mion, PLLC

Claims

The invention claimed is:

1. An adhesive sheet joining method of joining an adhesive sheet to a workpiece, the method comprising: transporting the adhesive sheet while holding the adhesive sheet with a transporting mechanism, the adhesive sheet having a separator attached thereto that is larger than the adhesive sheet; separating the separator from the adhesive sheet by holding a portion of the separator protruding from a front end of the adhesive sheet with a holder on a tip of an arm of a separating mechanism in front of the adhesive sheet in a standby state, and by moving the holder in a direction crossing with respect to a surface of the adhesive sheet moving horizontally in a transportation direction and moving the transporting mechanism in synchronization with movement of the holder in the transportation direction while folding back the separator at an end of a supporting member contacting the separator as a starting point; and joining the adhesive sheet by transporting the adhesive sheet with the separator separated therefrom to the workpiece with the adhesive sheet being held with the transporting mechanism.

2. The adhesive sheet joining method according to claim 1, wherein the separating comprises adjusting a moving distance of the holder in accordance with a length of the adhesive sheet.

3. The adhesive sheet joining method according to claim 1, wherein the separating comprises swinging the arm of the separating mechanism while moving the holder.

4. The adhesive sheet joining method according to claim 1, wherein the separating comprises moving the holder also in the transportation direction.

5. An adhesive sheet joining apparatus joining an adhesive sheet to a workpiece, the adhesive sheet joining apparatus comprising: a transporting mechanism transporting the adhesive sheet having a separator attached thereto that is larger than the adhesive sheet; a supporting member located in at least a separation position of the separator and sandwiching the adhesive sheet along with the transporting mechanism; and a separating mechanism separating the separator from the adhesive sheet by holding a portion of the separator protruding from the adhesive sheet to be transported with the transporting mechanism using a holder at a tip of an arm and by moving the holder in a direction crossing with respect to a surface of the adhesive sheet moving horizontally a transportation direction of the adhesive sheet using a first drive mechanism while folding back the separator at an end of the supporting member as a starting point, the transporting mechanism moving while holding the adhesive sheet in synchronization with separation of the separating mechanism, and transporting and joining the adhesive sheet with the separator separated therefrom to the workpiece.

6. The adhesive sheet joining apparatus according to claim 5, wherein the arm of the separating mechanism swings while moving in the direction crossing the transportation direction.

7. The adhesive sheet joining apparatus according to claim 5, further comprising: a second drive mechanism moving the holder of the separating mechanism in the transportation direction of the adhesive sheet.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a National Stage of International Application No. PCT/JP2013/079595 filed Oct. 31, 2013, claiming priority based on Japanese Patent Application No. 2012-243481 filed Nov. 5, 2012, the contents of all of which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present invention relates to an adhesive sheet joining method and an adhesive sheet joining apparatus for joining an adhesive sheet to a steel plate of transport machinery including automobiles and various types of industrial machinery for reinforcement or vibration suppression.

BACKGROUND ART

In recent years, a steel plate tends to be made thinner for reduction in weight of vehicles such as automobiles. Such a thinner steel plate causes degraded rigidity thereof. Moreover, the thinner steel plate also causes easy receipt of vibrations and noises from an uneven road surface or an engine. Consequently, a resin sheet for reinforcing rigidity of a steel plate or for vibration suppression has been suggested. See Patent Literature 1.

Moreover, such an apparatus has been suggested that separates release paper from a reinforcing resin sheet and joins the resin sheet to side members constituting a side shell of an automobile body automatically. The apparatus joins the resin sheet as under. Firstly, the release paper is separated from the resin sheet. Specifically, a pressurizing roller presses against the release paper while swinging downward. Here, the release paper is larger than the resin sheet protruding from an end of a guide member provided in front of a conveyance belt. The roller is provided on an arm of a release paper pressurizing apparatus. The pressurizing roller moves downward to firmly hold a front end of the release paper together with the conveyance belt. Under such a condition, the conveyance belt continuously travels, whereby the release paper is separated from the resin sheet while the resin sheet is fed out from the guide member.

The resin sheet with the release paper separated therefrom is placed on a sheet supporting part in front of the guide member. The resin sheet on the sheet supporting part is pressed with a pad of a vacuum-suction apparatus, and is transported to the side members of the automobile. Thereafter, the pressurizing roller rolls on the resin sheet to join the resin sheet to the side members. See Patent Literature 2.

[Patent Literature 1] Japanese Patent Publication No. 2005-139218A

[Patent Literature 2] Japanese Patent Publication No. 2010-24038A

SUMMARY OF INVENTION

Technical Problem

The currently-used joining apparatus is designed to place the resin sheet with the release paper separated therefrom onto the sheet supporting part in front of the conveyance belt for delivering the resin sheet to the vacuum-suction apparatus. This leads to restriction in speed of separating the release paper from the resin sheet while the pressurizing roller firmly holds the release paper. Consequently, when a resin sheet having high adhesiveness and difficulty in separation of the release paper is adopted and the release paper is separated from the resin sheet, the restriction in separation speed leads to lower tension to a separation point on the release paper than an adhesive force of the resin sheet. As a result, the release paper is not completely separated from the resin sheet, and thus ruptures. Such a problem may arise.

In addition, the resin sheet with the release paper separated therefrom is placed on the sheet supporting part while an adhesive face thereof is directed downward. The sheet supporting part has serrated unevenness on a front face thereof for achieving difficulty in adhesion thereof to the resin sheet. Consequently, the unevenness on the front surface of the sheet supporting part is transferred to the adhesive face of the resin sheet by a pressing force applied when the pad of the vacuum-suction apparatus suction-holds the resin sheet on the sheet supporting part. When the thermosetting resin sheet under such a condition is joined to a thin steel plate and is subjected to a heat treatment, an uneven thickness of the resin sheet causes a wavy front face of the steel plate. Such a problem may also arise.

The present invention has been made regarding the state of the art noted above, and its primary object is to provide an adhesive sheet joining method and an adhesive sheet joining apparatus that allow joining of an adhesive sheet to a steel plate such as transport machinery accurately at high speed.

Solution to Problem

One embodiment of the present invention discloses an adhesive sheet joining method of joining an adhesive sheet to a workpiece. The method includes transporting the adhesive sheet while holding the adhesive sheet with a transporting mechanism, the adhesive sheet having a separator attached thereto that is larger than the adhesive sheet; separating the separator from the adhesive sheet by holding a portion of the separator protruding from a front end of the adhesive sheet with a holder on a tip of an arm of a separating mechanism in front of the adhesive sheet in a standby state, and by moving the holder in a direction crossing a transportation direction and moving the transporting mechanism in synchronization with movement of the holder in the transportation direction while folding back the separator at an end of a supporting member contacting the separator as a starting point; and joining the adhesive sheet by transporting the adhesive sheet with the separator separated therefrom to the workpiece with the adhesive sheet being held with the transporting mechanism.

Operation and Effect

With the method of the present embodiment, the separator of the adhesive sheet fed out from the end of the supporting member is held with the holder in front of the separator. The holder that holds the separator moves in the direction crossing the transportation direction, thereby allowing folding back and separation of the separator at the end of the supporting member. Upon separation of the separator, the transporting mechanism holding the adhesive sheet is synchronized with the movement of the holder. This achieves separation of the separator from the adhesive sheet at a speed for ready separation while tension is applied to the separator uniformly. In other words, the separation speed is settable appropriately regardless of the transportation speed of the adhesive sheet.

Moreover, the adhesive sheet with the separator separated therefrom is allowed to be joined to the workpiece by transporting the adhesive sheet with the adhesive sheet being held with the transporting mechanism. This eliminates formation of unnecessary unevenness or adhesion of dust on the adhesive face of the adhesive sheet. As a result, the adhesive sheet is joinable to the workpiece with a uniform thickness of the adhesive sheet.

Furthermore, the transporting mechanism holds the adhesive sheet during a period between separation of the separator from the adhesive sheet and adhesion of the adhesive sheet to the workpiece. Accordingly, there is no need to place and deliver the adhesive sheet in each of the processes. That is, a shorter cycle time than that in the currently-used method is obtainable.

Moreover, the separating includes adjusting a moving distance of the holder in accordance with a length of the adhesive sheet. Such is preferable.

For instance, the arm of the separating mechanism swings while the holder moves. Alternatively, the holder is moved in the direction crossing the transportation direction of the adhesive sheet as well as in the transportation direction.

With the method according to the above, the separator is allowed to be separated from the adhesive sheet while tension is applied to the separator uniformly until the release paper is completely separated from the adhesive sheet.

In addition, another embodiment of the present invention is disclosed.

That is, disclosed is an adhesive sheet joining apparatus joining an adhesive sheet to a workpiece. The adhesive sheet joining apparatus includes a transporting mechanism transporting the adhesive sheet having a separator attached thereto that is larger than the adhesive sheet, a supporting member located in at least a separation position of the separator and sandwiching the adhesive sheet along with the transporting mechanism, and a separating mechanism separating the separator from the adhesive sheet by holding a portion of the separator protruding from the adhesive sheet to be