JPH0623689A - Cutter structure for laminate paper sheet - Google Patents

Abstract

PURPOSE:To perform reliable cutting of a laminate paper sheet by a method wherein a sheet-form cutter approximately in a triangular shape having a tip having down inclination in a running direction from the side edge of the overlapped part of the laminate paper sheet is inserted and locked to a belt-like film and run in a direction crossing the running direction thereof at right angles. CONSTITUTION:The rear end part of a running paper sheet 16 is overlapped with the upper part of the front end part of a subsequent paper sheet 16 by a given amount to laminate a belt-like film to the continuously fed paper sheets 16. The overlapped part 45 of a laminate paper sheet 20 is detected by a detecting part and transferred to and positioned at a cutting part 14. Thereafter, the tip of a cutter 54 formed approximately in a triangular shape is inserted from the side edge of the overlapped part 45 and moved in a direction crossing the running direction of the paper sheet at right angles, and only the belt-like film is torn along the overlapped part 45 of the paper sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet cutter structure, and more particularly to a continuous sheet feeding method in which a trailing end portion of a preceding sheet is superposed on a front end portion of a succeeding sheet by a predetermined amount. Laminate a strip of paper on a sheet to be printed, press down the lower sheet at the side edge where the laminated sheet overlaps with the cutter, and open the cutter from this side edge, the direction perpendicular to the sheet running direction. The present invention relates to a laminated sheet cutter structure in which only a strip-shaped film is cut along an overlapping end portion of the sheet by moving the sheet to the sheet.

[0002]

2. Description of the Related Art In general, a laminating apparatus is continuously supplied with a belt-shaped film and a sheet in a belt-shaped or cut into a predetermined size, and a film coated with various adhesives is continuously laminated. Then, the laminated laminated sheet is cut into a predetermined size and used as a cover for books, a menu for restaurants, packaging paper, or the like.

[0003]

When the laminated sheet is cut to a predetermined size, the adhesive tape is used to cut the laminated sheet. Because it cuts with the paper of
Rigidity is required for the cutting part and it becomes large in size, and the wear of the cutter is accelerated and the frequency of replacement is high, which makes maintenance difficult, and continuous feeding with the ends abutted together is laminated. When cutting the cut sheet from the butt section, it is necessary to accurately match the traveling position of the cutter with the butt position, which requires the detection of the stop position of the butt section of the laminated sheet and the positioning accuracy. In addition, since the posture at the time of feeding the sheet is also required to be accurate, the operability becomes difficult, the structure becomes complicated, and the manufacturing cost rises.

Further, when the laminated sheet is stopped at the cutting position and the cutter is moved in the overlapping portion in the direction orthogonal to the running direction of the laminated sheet to cut only the strip-shaped laminated film, this kind of Various types of cutter shapes and structures have been adopted from the past, but these may cause the cutter to come off the cutting part during cutting and running, or cut the sheet itself in addition to the strip-shaped film, or It was impossible to cut the band-shaped film in the middle of cutting, the band-shaped film was jammed with the cutter, and there was no definitive way to reliably cut only the band-shaped film.

Therefore, an object of the present invention is to laminate a strip-shaped laminate on a sheet that is continuously fed with the trailing edge of the preceding sheet superposed on the upper part of the front edge of the succeeding sheet by a predetermined amount. , The lower edge of the overlapping sheet of the laminated sheet transferred to the cutting section and positioned by the cutter is pressed down and opened by a cutter,
By inserting the tip of a cutter formed in a substantially triangular shape from this position and moving it in the direction orthogonal to the sheet traveling direction to tear it, only the strip-shaped film can be cut with a simple configuration. The present invention provides a cutter structure for laminated sheets that can be reliably cut along the overlapping ends of the sheet.

[0006]

In order to achieve the above object, the present invention provides a laminated sheet cutter structure for cutting only a strip-shaped film laminated on a sheet to be continuously fed. The rear end of the sheet is superposed on the upper part of the front end of the succeeding sheet by a predetermined amount to continuously feed the sheet, and a laminating section for laminating a strip-shaped film on the sheet is provided, and the sheet is fed from this processing section. A transfer section for transferring the laminated sheet is provided, and a cutting section for tearing only the strip-shaped film of the laminated sheet along the overlapping end is provided at this transfer section, and the cutting section is in front of the laminated sheet traveling direction. Is provided with a detection unit that detects the overlapping end portion of this sheet and moves it by a predetermined distance to position and stop it at the cutting position, and is provided between the laminating unit and the transfer unit. A tension control device for controlling the tension of the paper to be constant is provided, and the cutting portion has a tip that is inclined downward toward the traveling direction from the side edge of the overlapping portion of the laminated sheet that is positioned and stopped at the cutting position. Insert a triangular thin plate cutter and lock it on the side edge of the strip film, move it in the direction orthogonal to the sheet running direction, and tear only the strip film along the laminated sheet overlapping edge. It is characterized in that it is configured as follows.

In this case, the cutting portion is a thin plate-shaped drive source which moves in a direction orthogonal to the traveling direction of the laminated sheet and a thin plate formed by a metal plate in a substantially triangular shape so as to be reciprocally movable by the drive source. A cutter whose tip is slightly inclined downward with respect to the running direction of the laminated sheet with respect to a horizontal plane, and at least a sheet formed near the sheet running end on the table upper surface for guiding and supporting the laminated sheet. An elongated opening having a length equal to or greater than the width of the paper and through which the tip of the cutter can be inserted, and the cutter is disposed in proximity to one edge of the opening in the direction opposite to the traveling direction of the laminated sheet. The lower edge of the overlapping sheets is pushed down and opened, and only the strip-shaped film is torn along the laminated sheet overlapping edge by the movement of the cutter by the drive source. If it is suitable.

Further, the cutting section is provided with a plurality of leaf springs on a support shaft extending in the direction orthogonal to the sheet in front of the position of the cutting section in the laminating traveling direction. It is preferable that the sheet is elastically pressed and urged between them.

[0009]

According to the laminated sheet cutter structure of the present invention, the sheet is continuously fed with the trailing end of the preceding sheet superposed on the front end of the succeeding sheet by a predetermined amount. Laminate the strip-shaped film on the paper, push down and open the side edge of the laminated sheet, which is transferred to the cutting section and positioned on the laminated sheet, and open the tip of the cutter formed in a substantially triangular shape from this position. By inserting and moving the sheet in a direction orthogonal to the sheet traveling direction and tearing it, only the strip-shaped film can be reliably cut along the overlapping end portion of the sheet with a simple configuration. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a laminated sheet cutter structure according to the present invention will now be described in detail with reference to the accompanying drawings. 1 is an overall perspective view of a laminating apparatus showing an embodiment in which a laminating sheet cutter structure according to the present invention is adopted in the laminating apparatus. In the figure, the laminating apparatus has a belt-like film 18 on the surface of a sheet that is continuously fed with the trailing edge of the preceding sheet 16 being superposed on the front edge of the following sheet 16 by a predetermined amount. Laminating section 10 for laminating and laminated sheet 2
It is composed of a transfer unit 12 that transfers 0 intermittently, and a cutting unit 14 that cuts the laminated sheet 20 after lamination transferred by the transfer unit 12 along the overlapping end portion.

More specifically, the laminating section 10 has a film roller 22 for holding the band-shaped film 18 having an adhesive applied to the surface thereof and covering the area with a film.
Then, in synchronization with the strip-shaped film 18 transferred from the film roller 22, the trailing end portion of the preceding sheet 16 is superposed on the upper surface of the front end portion of the succeeding sheet 16 by a predetermined amount to form the sheet 16. A pair of heating rollers 2 for continuously feeding and continuously laminating the strip-shaped film 18 on the sheet 16.
4 and 26 and the heating rollers 24 and 26 make the sheet 1
Immediately after laminating the strip-shaped film 18 on the sheet 6, the pair of cooling fans 28 for cooling the strip-shaped film 18 and the laminated sheet 20
Drive roller 30 for sending

The laminated sheet transfer section 12 is disposed between the inlet side and the outlet side of the laminating section 10 and is a weight that supports the tension of the laminated sheet 20 by its own weight or swingably. A tension adjusting roller 32 which constitutes a tension adjusting device for adjusting through a weight, a drive roller 36 which is intermittently started and stopped by a drive motor 34, and the drive roller 3
On the upper part of 6, a pressing roller 40 is supported so as to be vertically movable so as to press the laminated sheet 20 between itself and the driving roller 36 by its own weight.

In this case, the laminated sheet 20 is continuously transferred from the laminating section 10 even though the transfer of the sheet 20 is stopped while the sheet 20 is being cut at the cutting section which will be described later. Looseness occurs between the processing unit 10 and the transfer unit 12. Therefore, by providing the tension adjusting roller 32 between the laminating unit 10 and the transfer unit 12, the slack of the laminated sheet 20 transferred from the laminating unit 10 can be adjusted by the weight or swing of the tension adjusting roller 32. The tension of the laminated sheet 20 at the cutting position can be made constant by adjusting it via the supported weight.

Further, although not shown in the drawing, a detecting section for detecting the overlapping edge is provided in front of the cutting section for cutting the overlapping edge of the laminated sheet 20 in the sheet traveling direction. A detection roller that constantly presses the upper surface of the sheet above the sheet is rotatably supported by the tip of a swingable lever, and the detection roller that swings depending on the thickness of the sheet when the overlapping end passes. The swing motion is detected by, for example, a limit switch, and the laminated sheet 2 is opposed to the detection roller.
It is possible to accurately position the overlapping end portion of the laminated sheet 20 at the cutting position by driving the driving roller 35 provided at the lower part of 0 by a preset number of pulses according to the detection signal from the detection unit.

Next, a laminated sheet cutter structure according to an embodiment of the present invention will be described with reference to FIGS. 2 shows an enlarged perspective view of the laminated sheet cutting unit, FIGS. 3 (a) to 3 (c) are explanatory views of the cutter structure in the laminated sheet cutting unit, and FIGS. d) is an overall view of various cutters showing another embodiment of the cutter structure.

First, in FIG. 2, reference numeral 42 is a table for supporting the laminated sheet 20, and a pair of side plates 4 are provided on both side surfaces of the table 42 in the vicinity of the sheet running end.
4 is provided (only one side is shown), and a rodless pneumatic cylinder 48 is mounted between the side plates 44 in a direction orthogonal to the traveling direction of the laminated sheet. A cutter 54, which will be described later, is fixed to the rodless cylinder 48 via a bracket 52 attached to an adapter 50 moved by the rodless cylinder 48.

Further, a support shaft 56 is installed between the side plates 44 in parallel with the rodless cylinder 48 in the vicinity of the opposite direction of the laminated sheet, and the support shaft 56 is provided.
A plurality of leaf springs 58 are attached to the sheet spring 58, and the ends of the leaf springs 58 evenly and elastically press the upper surface of the laminated sheet 20 traveling on the table 42 to cut the laminated sheet 20. To prevent floating up.

Further, in one embodiment of the cutter structure shown in FIG. 3, (a) of FIG. 3 shows a partial cross section of the table, and at least the sheet is provided near the sheet running end on the upper surface of the table 42. An elongated opening portion 46 having a length equal to or greater than the width of the paper 20 is formed, and the opening portion 46 is shown in FIG.
A cutter 54 formed by forming a thin metal plate (for example, stainless steel) into a substantially triangular shape is fixed to the bracket 52 in a state in which the cutter 54 is slightly inclined with respect to the horizontal plane in the sheet traveling direction, and its tip portion is made of sheet. Set so that the overlapping end is slightly inserted.

In this case, the tip of the cutter 54 has an arc R.
And the straight parts of both hypotenuses form a cutting edge with an obtuse angle or an arc shape in cross section, and both sides of the pointed part that constitutes this cutting blade have a tilt angle θ that is symmetrical with respect to a line parallel to the mounting portion.
(42 ° in this embodiment). Also, FIG.
As shown in the enlarged sectional view of (c), the lower end portion of the sheet overlapping portion positioned in the elongated opening portion 46 formed on the table 42 hangs down slightly due to its own weight, and the opening portion is provided above it. It is preferable that the tip of the cutter 54 through which 46 is inserted is positioned and the gap between the lower surface of the cutter 54 and the upper surface of the lower end sheet 16 is set to about 0.2 mm.

Further, FIG. 4 shows another embodiment of the cutter structure. The cutter 54 shown in FIG. 4 (a) is formed in a substantially triangular shape in plan view, but is viewed in the direction of arrow X in FIG. 4 (a). As shown in FIG. 4 (b), the cutter surface is formed so that the pointed end inclined downward is curved in an arc shape having a radius R ₁ . Further, the cutting blades on both sides of the tip of the cutter 54a shown in FIG. 4C with respect to the straight line portions of the both hypotenuses described above are formed by continuous convex arcs having different radii R ₂ . Then, tearing blade of the cutter 54b pointed end sides shown in FIG. 4 (d) to the linear portion of the triangular inclined sides as described above is formed by concave arcs of different radii R ₃ each consecutive. By adopting such a cutter structure, the strip-shaped film at the laminated sheet overlapping end portion can be reliably torn along the end portion.

[0021]

As is apparent from the above-described embodiment, according to the present invention, the trailing edge of the preceding sheet is continuously fed by superposing the trailing edge of the preceding sheet on the upper portion of the leading edge of the succeeding sheet by a predetermined amount. At the same time, a laminating section for laminating the strip-shaped film on the sheet is provided, and a transfer section for transferring the laminated sheet fed from the processing section is provided, and only the strip-shaped film for the laminated sheet is provided in the transfer section. A cutting section that cuts along the overlapping edge is provided, and the overlapping edge of this sheet is detected in front of the cutting section in the laminating sheet running direction, and this is moved for a predetermined distance to position it at the cutting position. A tension controller for controlling the tension of the laminated sheet is provided between the laminating section and the transfer section, the tension control apparatus being provided between the laminating section and the transfer section. Insert a substantially triangular thin plate-shaped cutter having sharp edges that are downwardly inclined from the side edge of the overlapping portion of the sheet and lock it on the side edge of the strip film, which is orthogonal to the sheet traveling direction. It is possible to cut the laminated sheet with a simple structure and surely, by moving it in the direction of the arrow and tearing only the strip-shaped film along the overlapping edge of the laminated sheet. It has an excellent effect that it can be reduced. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and it is needless to say that various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a laminating apparatus showing an embodiment in which a laminating sheet cutter structure according to the present invention is adopted in the laminating apparatus.

FIG. 2 is an enlarged perspective view of a laminated sheet cutting unit.

3 (a), (b) and (c) are explanatory views of a cutter structure in a laminated sheet cutting unit.

4 (a), (b), (c) and (d) are general views of various cutters showing another embodiment of the cutter structure.

[Explanation of symbols]

10 Laminating Processing Section 12 Transfer Section 14 Cutting Section 16 Sheet Paper 18 Strip Film 20 Laminate Sheet Paper 22 Film Roller 24, 26
Heating roller 30 driving roller 30, 35,
38 Drive roller 32 Tension adjusting roller 34 Motor 42 Table 44 Side plate 45 Overlapping portion 46 Opening portion 48 Rodless cylinder 54 Cutter 56 Support shaft 58 Leaf spring

Claims (2)

[Claims] 1. A laminated sheet cutter structure for cutting only a strip-shaped film laminated on continuously fed sheets, wherein a trailing end portion of a preceding sheet is a front end portion of a succeeding sheet. A laminating unit for laminating a strip-shaped film on the sheet is provided at the upper part for continuously feeding a predetermined amount, and a transfer unit for transferring the laminated sheet fed from the processing unit is provided. A cutting section is provided to cut only the strip-shaped film of the laminated sheet along the overlapping edge, and the overlapping edge of this sheet is detected in front of the cutting section in the running direction of the laminated sheet, and this is specified. A detection unit for moving the distance to position and stop the cutting position at the cutting position is provided, and a tension control device is provided between the laminating unit and the transfer unit to constantly control the tension of the laminated sheet. The cutting portion is inserted into a side edge of the strip-shaped film by inserting a thin plate-shaped cutter having a substantially triangular shape having a tip inclined downward in the running direction from the side edge of the overlapping portion of the laminated sheet which is positioned and stopped at the cutting position. Laminated sheet cutter structure, characterized in that it is stopped and moved in a direction orthogonal to the sheet running direction so that only the strip-shaped film is cut along the laminated sheet overlapping end portion. . 2. The cutting portion is a thin plate-shaped drive source that moves in a direction orthogonal to the traveling direction of the laminated sheet, and a thin plate formed in a substantially triangular shape by a metal plate that is reciprocally movable by the drive source. A cutter whose tip is set to be slightly inclined downward with respect to the running direction of the laminated sheet with respect to the horizontal plane, and at least the sheet formed near the sheet running end on the table upper surface for guiding and supporting the laminated sheet. With an elongated opening having a length equal to or greater than the width of the cutter and through which the tip of the cutter can be inserted, the cutter is disposed close to one edge of the opening in the direction opposite to the laminating sheet of the laminated sheet. A structure in which the lower side edge of the overlapping sheets is pushed down and opened, and only the strip-shaped film is cut along the laminated sheet overlapping end by the movement of the cutter by the drive source. Cutter structure of laminated leaves paper 1 described.