JPH10315424A - Laminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminator for incorporating sufficient curl correcting function even when an installation space is small. SOLUTION: The laminator having a film supply unit 20 for supplying a laminating film F, and a laminating unit 30 for thermally press bonding the film on one surface of a material to be laminated comprises a curl correcting member 41 provided at a rear stage of the unit and having a bar-like fixed contact part 41 for bending the material laminated with the film at a side in which the film is not laminated with a circular arc-like section having a small radius of curvature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermocompression laminator for laminating a laminate film on an object such as a book cover or a restaurant menu.

[0002]

2. Description of the Related Art Heretofore, as this type of laminator, there are known a laminator in which a laminated film is laminated on both sides of a sheet-like object (double-sided laminator) and a laminator in which only one side is laminated (single-sided laminator). However, in the case of a single-sided laminator, since the laminate film is applied only to one side of the object, there is a problem that the laminate film contracts after lamination and curls toward the film side. Therefore, after heating and pressing the laminated film to the object, the curl correction roller that curves the object to the side where the laminate film is not affixed, and curl correction to respond to curl that varies in size depending on the paper quality etc. of the object A laminator having an angle adjusting roller for varying a winding angle around a roller has been disclosed (Japanese Patent Application Laid-Open No. 8-58049).

[0003]

However, in the above-described conventional laminator, the adjustment of the wrapping angle around the curl correcting roller is performed only by moving the angle adjusting roller.
Depending on the size of the apparatus, the amount of movement of the adjusting roller is limited, and there has been a problem that the winding angle around the curl correcting roller cannot be sufficiently secured. On the other hand, as described above, since a double-sided laminator and a single-sided laminator coexist, development of a dual-purpose laminator has been desired.

A first object of the present invention is to provide a laminator capable of sufficiently providing a curl correcting function even if the installation space is small. A second object of the present invention is to provide a laminator that can be used as a single-sided laminator while being a double-sided laminator.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a film supply section (20) for supplying a laminate film (F), and heating the laminate film on one side of an object to be laminated. Laminating part to crimp (30)
In the laminator provided with, a bar-shaped fixing including an arc-shaped cross section with a small radius of curvature, which is provided at the subsequent stage of the laminating section and curves the laminated object on which the laminated film is laminated to the side where the laminated film is not laminated. Curl correcting member (4) having a contact portion (41a)
It is a laminator characterized by including 1).

According to a second aspect of the present invention, the first and second film supply units (20, 20-2) for supplying the laminated films (F1, F2) are provided on both sides of the laminated film with the object to be laminated therebetween. Laminating part to be heated and pressed (30)
In the laminator provided with, a bar-shaped fixing including an arc-shaped cross section with a small radius of curvature, which is provided at the subsequent stage of the laminating section and curves the laminated object on which the laminated film is laminated to the side where the laminated film is not laminated. Curl correcting member (4) having a contact portion (41a)
The laminator according to 1), wherein the curl correcting section is used when the laminate film is supplied from only one of the first and second film supply sections.

[0007] The third aspect of the present invention is the first or second aspect.
Wherein the curl correcting member is a prism.

According to a fourth aspect of the present invention, in the laminator according to the third aspect, the prism is a substantially quadrangular prism, and its cross section is formed by arcs having four corners of different sizes. Laminator.

[0009]

Embodiments of the present invention will be described below in more detail with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a first embodiment of a laminator according to the present invention. The laminator according to the first embodiment includes a film supply unit 20, a laminating unit 30, a curl correcting unit 40, and a driving unit 50. The film supply unit 20 includes a film shaft 21 and a film roll 22.
And The film shaft 21 forms a film roll 22 by winding the laminated film F, and is a shaft that becomes a rotation center of the film roll 22 when the film is supplied. The laminate film F is, for example, a thermoplastic resin film such as polypropylene or polyester that softens at a low temperature.

The laminating section 30 includes an idle roller 3
1, a heating roller 32 and press rollers 33 and 34 are provided. The idle roller 31 is used for the film roll 22.
Is a roller for changing the running direction so that the laminated film F maintains a constant contact length with the heating roller 32 irrespective of the size. The heating roller 32
A roller for heating the laminated film F to a temperature at which the laminated film F can be fused, and a heater 32a is provided inside a hollow cylindrical aluminum material. Press roller 3
Reference numerals 3 and 34 denote rollers for pressing the laminated film F, which is heated by the heating roller 32 and overlaps the sheets S, from above and below. Also, the press rollers 33, 34
Is also provided with a heater (not shown) to prevent the temperature of the laminated film F from decreasing.

The curl correcting section 40 includes a curl correcting member 41.
, An angle adjusting roller 42 and an idle roller 43. The curl correcting member 41 is a member that bends the laminated sheets S to the side where the laminated film F is not stuck, and has a rod-shaped contact portion 41a including a fixed arc-shaped cross section having a small radius of curvature. ing. The angle adjusting roller 42 is a roller that changes the winding angle of the laminated sheets S around the curl correcting member 41, and moves up and down according to the size of the curl of the target object.
The idle roller 43 changes the traveling direction of the laminated film F so that the laminated film F is sent to the pull-out rollers 51 and 52 in a fixed direction regardless of the position of the angle adjusting roller 42.

The drive unit 50 includes pull-out rollers 51 and 52.
, A motor 53, a chain 54, and a tension sprocket 55. Pull-out rollers 51, 52
Is a roller for pulling out the laminated sheets S. The press roller 33 and the draw-out roller 52
It is rotationally driven by a motor 53 via a chain 54.

The laminated film F wound around the film shaft 21 and constituting the film roll 22 is heated by the heating roller 32 to a temperature at which the laminated film F can be fused, and then pressed together with the sheets S by the press rollers 33, 34.
The sheets S and the laminated film are pressed from above and below by these rollers to be integrated, and then the curl correcting member 4 is pressed.
The curl is corrected by 1 and the curl is discharged from the pull-out rollers 51 and 52. When the sheet S is thick and has a stiffness, the curl generated is small. Therefore, the sheet S does not need to be wrapped around the curl correcting member 41, and the angle adjusting roller is set upward. When the sheets S are thin and have no stiffness, the curl is large. Therefore, the angle correcting roller is set downward in order to increase the amount of the sheets S wound around the curl correcting member 41.

According to the first embodiment, as the curl correcting member, a correcting member having a rod-shaped fixed contact portion including an arc-shaped cross section having a small radius of curvature is used. Since the winding angle is increased and the amount of vertical movement of the angle adjusting roller can be reduced, it can be used for a small device.

(Second Embodiment) FIG. 2 is a diagram showing a second embodiment of the laminator according to the present invention. In the following embodiments, portions that perform the same functions as in the above-described first embodiment will be denoted by the same reference numerals, and redundant description will be omitted as appropriate. In the second embodiment, the film supply unit includes laminated films F1 and F2 and a film shaft 2
The laminating unit 30 includes idle rollers 31 and 31-2 and heating rollers 32 and 32.
-2 and a double-sided laminator including press rollers 33 and 34.

In the laminator of the second embodiment, when laminating an object on both sides, the heating rollers 32, 32-2
With the sheets S inserted between the laminated films F1 and F2 heated by the
1, F2 is pressed from above and below. At this time, since the curl correcting unit is not used, the angle adjusting roller is retracted upward. On the other hand, when laminating the object on one side, only the laminate film F1 is set. Since the curl correcting section is used, the angle adjusting roller is lowered and set to an appropriate position as shown by the two-dot chain line, and is used similarly to the first embodiment. Thus, in the second embodiment,
Since the double-sided laminator is provided with the curl correcting member, it can be used as a single-sided laminator for suppressing the curl.

(Third Embodiment) FIG. 3 is an enlarged view of a curl correcting member according to a third embodiment of the laminator according to the present invention. The curl correcting member 41-2 is a substantially quadrangular prism, and its cross section has four corners having different radii (R1, R
2, R3, R4) and the axis O
It can be rotated around.

According to the third embodiment, the curl correcting member 4
Since the arcs at the four corners of 1-2 are different in size, single-sided lamination without curl is possible with various sheets and laminate films by properly using the correction member and the angle adjusting roller. For example, when laminating thin paper such as a book cover, since the curl after lamination is large, a small arc is used for the correction member. However, when a smaller arc is used, the bending stress generated in the laminated film becomes too large, and the film may become cloudy. Therefore, the angle adjusting roller is set upward.
When laminating cardboard such as cardboard, the correction member uses a large arc and the angle adjustment roller is set downward to prevent the paper from bending.

(Modifications) Various modifications and changes are possible without being limited to the above-described embodiment, and these are also within the equivalent scope of the present invention. For example, in the second embodiment, the film roll 2 located below the apparatus
0-2 may be used. In this case, the curl correcting section may be located above the laminate film. In the third embodiment, the prism is not limited to a quadratic prism, and may be another polygonal prism such as a triangular prism or a hexagonal prism.

[0020]

As described in detail above, according to the present invention, since the curl correcting member is provided with the correcting member having the rod-shaped fixed contact portion including the arc-shaped cross section having the small radius of curvature, Since the wrapping angle of the sheet with respect to the correction member is increased and the amount of vertical movement of the angle adjusting roller can be reduced, curling can be suppressed even with a small size.

In the case of a double-sided laminator,
Since the curl correcting member is provided, it can be used as a one-sided laminator for suppressing the curl.

Further, since the arcs at the four corners of the curl correcting member are different in size, it is possible to perform single-sided lamination without curl on sheets or laminated films of various materials and thicknesses.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a laminator according to the present invention.

FIG. 2 is a diagram showing a second embodiment of a laminator according to the present invention.

FIG. 3 is an enlarged view of a curl correcting member according to a third embodiment of the laminator according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 laminator 20 film supply unit 21 film shaft 22 film roll 30 laminating unit 31 idle roller 32 heating roller 33, 34 press roller 40 curl correction unit 41 curl correction member 42 angle adjustment roller 43 idle roller 50 drive unit 51, 52 pull-out roller 53 Motor 54 Chain 55 Tension sprocket

Claims (4)

[Claims] 1. A laminator comprising: a film supply unit that supplies a laminate film; and a lamination unit that heat-presses the laminate film to one surface of an object to be laminated. A curl correcting member having a rod-shaped fixed contact portion including an arc-shaped cross section having a small radius of curvature, which curves the laminated object to the side on which the laminate film is not laminated. Laminator. 2. A laminator comprising: first and second film supply units for supplying a laminated film; and a laminating unit for applying heat and pressure to both sides of the laminated film with an object to be laminated interposed therebetween. A curl having a rod-shaped fixed contact portion including a circular cross section having a small radius of curvature, which is provided at a subsequent stage and curves the object on which the laminate film is laminated to a side where the laminate film is not laminated. A laminator comprising a correction member, wherein the curl correction section is used when the laminate film is supplied from only one of the first and second film supply sections. 3. The laminator according to claim 1, wherein the curl correcting member is a prism. 4. The laminator according to claim 3, wherein the prism is a substantially quadrangular prism, and a cross section of the laminator is formed by arcs having four corners of different sizes.