JPH02297422A - Film suction holding method and film tacking member for film tacking member for laminator - Google Patents

Abstract

PURPOSE:To securely hold film by suction without shifting the film by a method wherein the film is held by suction by means of sucking force under vacuum so as to turn into projected and recessed shape along the longitudinal direction of the film on the suction surface of the tack member of the film. CONSTITUTION:On the suction surface of the tack member 8 of the film of a laminator 1, grooves 4 extending normal to the longitudinal direction of the film 3 are formed so as to mark off the contact surface, which forms projected and recessed shape along the longitudinal direction of the film, by the grooves 14 onto the suction surface. Vacuum vent holes 15 are provided both on projected parts and on recessed parts. In actuation, the tack member 8 of the film, along the projected and recessed shaped contact surface of which the tip part of the film 3 is suckingly held, is moved so as to pull the film 3 out of the feed roll 4 of the film so as to temporarily attach the tip part of the film 3 to the front end part of a panel 17. Due to the above-mentioned structure of the member, the possibility of the film for shifting is very small, resulting in eliminating the fear of developing poor temporary fixing and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a film tacking member used in a laminator for adhering a film to a panel.

BACKGROUND OF THE INVENTION Laminators for applying films to panels are known in the art. For example, in the laminator disclosed in Japanese Patent Application Laid-open No. 52-14876, when starting the film adhesion work, the film is tacked by vacuum suctioning the leading end of the film to the suction surface of the member and holding it while bringing it close to the panel. Temporarily attach the film tip to the front edge, then
The panel together with the temporarily attached film is conveyed between a pair of pressure rolls to adhere the film to the panel.

A further improved laminator is disclosed in the specification and drawings of Japanese Patent Application No. 58-82241. In this laminator, the block member supporting the film tacking member can be moved close to the film tacking station at the same speed and direction as the running continuous film being attached to the panel. To temporarily attach the film, if the film is vacuum-adsorbed to the suction surface of the member and the cutter attached to the block member is used to cut the film in the horizontal direction during the above-mentioned close movement, the continuous film can be cut without interrupting the film adhesion work. A desired film sheet can be formed according to the size of the panel.

In this manner, the film tacking member plays the role of holding the film by vacuum suction during film tacking and cutting.

In conventional film tacking, member a has a flat suction surface as shown in FIGS. 1 and 2.

A plurality of rows of holes C for vacuum suction are provided in the suction surface along the width direction of the film d.

Problems to be Solved by the Invention However, depending on the type of film, the suction and holding of the film by such a flat suction surface is not always sufficient, and therefore, when tacking the film, the film may sometimes shift and the tacking may result in defects. there is a possibility.

Therefore, an object of the present invention is to provide a film tacking member that can reliably adsorb and hold any type of film without shifting. The above problem is solved by making the suction surface of the film uneven in the longitudinal direction of the film.

Function: In the film tacking according to the present invention, the member suctions and holds the film when tacking the leading end of the film to the front edge of the panel and when cutting the film. It is adsorbed so that it follows the uneven shape.

Embodiments FIGS. 3 to 6 show a laminator equipped with a film tacking member according to the present invention, except for the film tacking member disclosed in the specification and drawings of the above-mentioned Japanese Patent Application No. 58-82241. It is the same as the one above.

The laminator 1 has side plate-like support members 2 (only one shown) on both sides, and a continuous film 3 is provided between the support members 2.
A supply roll 4 wound with . Each support member 2
A plate-shaped block member 7 is attached to a guide rail 5 fixed to the guide rail 5 so as to be movable up and down. In the film tacking according to the present invention, the member 8 is provided between the block members 7.

For film tacking, the member 8 is supported on both sides by the other end of a piston cylinder mechanism 9 whose one end is attached to each block member 7, and by the operation of the piston cylinder mechanism 9,
Each block member 7 is movable along a cam groove 10 provided at the bottom thereof.

On the other hand, since each block member 7 is connected to an endless chain 12 stretched around a sprocket 11 provided on each support member 2, the block member 7 and the member 8 can temporarily attach the film by the operation of the chain 12. Laminator 1
The film tacking can be moved toward and away from the station 13.

-4= As shown in detail in FIGS. 7 to 9, the suction surface of the member 8 for film tacking has an uneven shape with grooves 14 extending transversely to the longitudinal direction of the film 3. Suction holes 15 are provided in both the convex portion and the concave portion. The holes 15 communicate with a vacuum generator (not shown), and are controlled by valves so that they can be selectively activated for each row in the vertical direction.

The film tacking member 8 may have an uneven suction surface by forming protrusions 16 extending transversely to the longitudinal direction of the film, as shown in FIG.

In operation, the panel 17 is conveyed by a conveying device such as a roller conveyor and is stopped when its front end reaches the film tacking station 13. As shown in detail in FIG. 7, the film tacking member 8, which suction-holds the leading end of the film 3 along the uneven shape of the suction surface, is lowered as shown in FIG.
Temporarily attach the tip of the panel to the front end of the panel 17.

When the tacking is completed, the film tacking member 8 stops its suction action and moves backward. At the same time, the chain 12 is driven, and the block member 7 is moved away from the film tacking station 13 together with the film tacking member 8 (see FIG. 5). Then, the panel conveyance device is operated again, and the film 3 is crimped onto the panel 17 between a pair of rotating crimping rolls 18 with both ends supported between the supporting members 2. At this time, the vacuum suction action of the member 8 for film tacking is stopped, and therefore the suction surface smoothly guides the film 3 on the upper surface of the convex portion, as shown in detail in FIG.

In order to cut the continuous film 3 into film sheets of a size matching the length of the panel 17, the chain 12 is driven at a predetermined point in response to a signal from a sensor etc. that detects the rear end of the panel 17, and the block The member 7 is moved close to the film tacking station 13 together with the film tacking member 8 at the same speed as the running speed of the film 3, that is, the rotational peripheral speed of the pressure roll 18 (see FIG. 6). . At this time, the vacuum suction action of the member 8 for film tacking is restarted, and the film 3 is suction-held along the uneven shape of the suction surface. During the above-mentioned approach movement, the cutter 19 attached to the lower end of the block member 7 moves toward the guide bar 20.
The upper film tacking is moved laterally with respect to the member 8, and the film 3 is cut into a film sheet of a predetermined length to match the size of the panel 17. The pressure roll 18 then continues to rotate to completely pressure the film sheet onto the panel 17. After one panel has been crimped, the film tacking member 8 waits in preparation for tacking the next panel while sucking and holding the newly tipped portion of the film 3.

Effects of the Invention According to the film tacking according to the present invention, the film is held by suction so as to follow the uneven shape of the suction surface along the longitudinal direction of the film, so it is not held by suction on a flat suction surface as in the past. The holding power is much better than when
Therefore, no matter what kind of film is used, there is no fear that the film may sometimes shift during tacking, resulting in defects during tacking.

In addition, the film in a laminator generally tends to wrinkle vertically in the longitudinal direction (running direction), but by configuring the suction surface of the film tacking member as in the present invention,
Since continuous vertical wrinkles can be temporarily cut off at the suction surface of the member during film tacking, the effect of vertical wrinkles on the panel can be almost eliminated.

[Brief explanation of the drawing]

FIG. 1 is a side view of a member used in conventional film tacking. FIG. 2 is also a fragmentary perspective view. FIG. 3 is a perspective view of a laminator equipped with an embodiment of the film tacking member according to the present invention, with one support member omitted. 4 to 6 are side views of the laminator of FIG. 3, each showing a different operating state. 7 and 8 are side views of an embodiment of the film tacking member according to the present invention. Figure 9 is the same (fragmentary perspective view.
FIG. 0 is a side view showing another embodiment of the film tacking member according to the present invention. 1: Laminator 3: Film 8, film temporary attachment component

Claims (1)

[Scope of Claims] 1. A film tacking member used in a laminator for attaching a film to a panel, in which the leading end of the film is held by vacuum suction on a suction surface at the start of the film adhering operation. 1. A film temporary attachment member for a laminator, wherein the suction surface has an uneven shape along the longitudinal direction of the film. 2. The film tacking member according to claim 1, wherein the suction surface has an uneven shape by forming at least one groove extending transversely to the longitudinal direction of the film. 3. The film tacking member according to claim 1, wherein the suction surface has an uneven shape by forming at least one protrusion extending in a direction transverse to the longitudinal direction of the film.