JPH01193195A - Cutting perforation machining device for continuous printing sheet - Google Patents

Abstract

PURPOSE:To facilitate processing of cutting perforation by setting slit provided with a plurality of holes lined in the form of an array on one side of rodlike convexed cylindrical lens of which the other side is formed convexed cylindrical, facing this convexed cylindrical face side to a continuous printing sheet side, while facing the concaved cylindrical face of a concaved cylindrical lens to the other side thereof. CONSTITUTION:When a razor beam from a razor oscillator 9a comes to one side of a concaved cylindrical lens 6, this razor beam is expanded in the form of a band only in the width direction of a continuous printing sheet 2 and comes to a convexed cylindrical lens 3. Next, this razor beam in the form of an array passes through a group of apertures 4 of a slit 5, and thereafter, collected by the lens 3 and collection-irradiated onto the sheet in a dotted line. Then, this sheet 2 is burnt in a dotted line and a lateral sewing line 11 is processed. Further, when the razor beam is emitted to an irradiation lens 7 comprising a convex lens from a razor oscillator 9b, this razor beam is collected in the form of dots and irradiated on the form in a dot form, and thereby a vertical sewing line 12 is processed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides continuous printing paper such as continuous slip paper printed by a form printing machine or the like.

The present invention relates to a cutting line processing device for continuous printing paper that processes perforations and linear concave marks so that printing paper can be easily cut at predetermined positions.

[Conventional technology]

Among the above-mentioned conventional cut line processing devices, the device for forming perforations on continuous printing paper has a plate-shaped processing blade having a perforation cutting blade attached to one of two rollers that roll into contact with each other.
This processing blade is used to form perforations at predetermined positions on the continuous printing paper that passes between both rollers.

In addition, as a device for processing concave marks on continuous printing paper, a processing blade having a plate shape and a linear blade is used, similar to the processing blade for perforations described above, and this processing blade is pressed against the continuous printing paper. Then, a concave mark was machined on this.

[Problem to be solved by the invention]

In the conventional cut line processing apparatus for continuous printing paper, there is a problem in that it is troublesome to attach and detach the processing blade to and from a holding member such as a roller, and particularly skill is required for attachment which requires precision.

Furthermore, when changing processing specifications such as processing intervals, the entire holding member such as the rollers must be replaced, which is a cumbersome task, and the long time required for this conversion process increases the downtime of the printing machine. There was a problem that the operating efficiency deteriorated.

Furthermore, since the processing performed by the conventional apparatus described above is mechanical processing, noise is generated during processing, which is one of the sources of noise in printing factories.

Furthermore, when perforating with a perforation blade, a crease occurs on the back edge of the perforation, which gives the perforation a bending direction that makes it easy to bend toward the front side. There has been a problem in that it adversely affects processing downstream of the section, such as folding processing using a folding machine.

The present invention has been developed in consideration of the above-mentioned problems, and does not require any skill in handling and adjusting the cutting device, which saves on skill, and allows changes in machining specifications to be made easily and in a short period of time. It is possible to save labor at this time, and it is also possible to shorten the downtime of the printing machine.
Furthermore, noise during machining can be eliminated, and in the case of perforation machining, there is no breakage at the back edge of the perforation, and there is no bending directionality in this area. It is an object of the present invention to provide a cut line processing device for continuous printing paper.

[Means to solve the problem]

In order to achieve the above object, the continuous printing paper cutting device according to the present invention has a convex cylindrical shape on one side and a slit with a large number of windows arranged in an array on the other side. A rod-shaped convex cylindrical lens is placed oppositely in the width direction with the convex cylindrical surface side facing the continuous printing paper side, and a concave cylindrical lens with one side having a concave cylindrical surface is placed oppositely to the continuous printing paper side. The cylindrical surface side of the convex cylindrical lens is provided facing in the longitudinal direction of the other side surface, and a laser oscillator whose oscillation frequency and pulse width can be adjusted is opposed to the other side surface of the concave cylindrical lens. ing.

In the above configuration, it is not necessary to attach a slit to the other side surface of the convex cylindrical lens.

In addition, an irradiation lens consisting of a convex lens with a convex spherical shape on one side was provided on the continuous printing paper to face the paper, and a laser oscillator whose oscillation frequency and pulse width were adjustable was placed on the other side of the convex lens. The structure is as follows.

Furthermore, the laser oscillator facing the other side of the convex lens may be replaced with a laser oscillator that continuously oscillates laser light.

[For production]

When a laser beam is incident on the concave cylindrical lens from a laser oscillator, the laser beam is expanded into a band shape only in the width direction of the continuous printing paper and is incident on the convex cylindrical lens. After this laser light passes through the slits in an array,
The light is focused by a convex cylindrical lens and irradiated onto the continuous printing paper in a dotted line, and the continuous printing paper is burned in a dotted line to form horizontal perforations formed by the combustion holes.

If there is no slit, a linear laser beam is irradiated onto the continuous printing paper from the convex cylindrical lens, but by suppressing the output of the laser beam at this time, linear concave marks are created on the continuous printing paper. Processed horizontally.

When a laser beam from a laser oscillator is incident on an irradiation lens consisting of a convex lens, the laser beam is focused into a dotted line on the running continuous printing paper in the form of a dotted line according to the oscillation frequency of the laser oscillator and its pulse width. The laser beam is irradiated in a dotted line, and continuous vertical perforations are created by combustion holes on the continuous printing paper.

At this time, when continuous laser light from a laser oscillator is incident on the irradiation lens, the continuous printing paper that is running is irradiated with the laser light in a linear manner. By suppressing the output of the laser beam at this time, linear concave marks are formed in the vertical direction on the continuous printing paper.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In the figure, 1a and lb are rollers that guide continuous printing paper (hereinafter simply referred to as paper) 2, and these rollers 1a and 1
b is disposed between a form printing machine and a processing section such as a folding machine (none of which is shown). Reference numeral 3 designates a convex cylindrical lens which is formed into a convex cylindrical shape on one side and whose length is equal to the width of the sheet 2. The convex cylindrical lens 3 is arranged above the paper 2 at a predetermined distance and with its cylindrical surface facing downward and parallel to the width direction of the paper 2. A slit 5 in which a large number of windows 4 are arranged in an array in the longitudinal direction is attached to the upper surface of the convex cylindrical lens 3. This slit 5 is made of a copper plate. 6 is a concave cylindrical lens with one side having a concave cylindrical shape, and this concave cylindrical lens 6
is disposed above the convex cylindrical lens 3, with its concave arc surface facing downward, and the concave arc surface facing the convex cylindrical lens 3 in its longitudinal direction.

Reference numeral 7 denotes an irradiation lens constituted by a convex lens with one side spherical, and this irradiation lens 7 is disposed opposite to a vertical perforation position that is a predetermined dimension larger than one side edge of the paper 2. .

The light incident sides of the convex cylindrical lens 3 and the irradiation lens 7 are opposed to laser oscillators 9a, 9b for horizontal and vertical sewing machines via total reflection mirrors 8a, 8b, 8c. Each of the laser oscillators 9a and 9b is capable of oscillating pulsed laser light, and the oscillation frequency and pulse width can be set arbitrarily. A CO2 laser was used for horizontal perforations, and a YAG laser was used for vertical perforations.

In the above configuration, the laser beam from the laser oscillator 9a for horizontal perforations is incident on the concave cylindrical lens 6 via the total reflection mirrors 8a and 8b, and the laser beam is expanded only in the width direction of the paper 2 here. This laser light is then incident on the convex cylindrical lens 3, where it is condensed into a line and irradiated onto the paper 2.

At this time, a large number of windows 4 are formed on the incident side of the convex cylindrical lens 3.
Since the slit 5 is attached, the laser light enters the convex cylindrical lens 3 in a continuous array, and each array of laser light is focused by the convex cylindrical lens 3 in a dotted line shape.

The paper 2 is instantaneously burned by the focused laser beam, and a hole 10 is formed as shown in FIG. Ru.

Since the paper 2 is actually running at a predetermined speed,
The laser beam is pulsed for an extremely short period of time in accordance with this speed. Further, the interval and width W of the horizontal perforations are determined by the traveling speed of the paper 2, the oscillation frequency of the laser oscillator, and the beam width of the laser light.

In other words, as a condition for the above-mentioned horizontal perforation processing, the paper width is set to 3
30■11 Horizontal perforation interval is 300mm.

When the traveling speed of the paper 2 is 9000 m/S, the oscillation frequency f of the laser oscillator 9a for horizontal perforations is f1 9000+300 30Hz. Furthermore, if the beam width of the laser beam focused on the paper 2 is 0.2 mm, and the width W of the horizontal perforation in the running direction of the paper 2 is set to 0.4 m+e, the laser light is irradiated. Since the paper 2 only needs to move by 0.2+n during this time, the pulse width P1 of the laser beam at this time is P, -0,2÷9000 1-22 μs.

On the other hand, the laser light from the laser oscillator 9b for vertical perforations is incident on the irradiation lens 7 via the total reflection mirror 8C, where it is focused and irradiated onto the paper 2. At this time, the laser oscillator 9b oscillates at a fine frequency and a fine pulse width, so that the laser beam is irradiated in a dotted line shape as the paper 2 travels, and as a result, only the portion irradiated with the laser beam is burned, and the paper 2 A dotted hole is formed and vertical perforations 12 are formed.

At this time, if the length of the hole in the vertical perforation 12 is 1 mm, then the oscillation frequency f of the laser oscillator 9b is
2. Pulse width P2 and traveling distance g of paper 2 are: f2-9ooo+ (2+1) =3000Hz P2-160ns 1-9000X160X10-6 -1. It will be 44am. Also, the irradiation lens 7 is (2X 0.2mm2)
A combination of a spherical lens and a convex cylindrical lens that can focus light is used.

As described above, horizontal perforations 11 with a width W of 0.4 mm+ are formed at intervals of L in the running direction of the paper 2 as the paper 2 runs.
are processed, and vertical perforations 12 each having a hole length of 2 steps and a hole interval of 1 step are continuously formed on the edge of the paper 2.

In the above embodiment, each laser oscillator 9a.

The energy of each laser beam 9b needs to be large enough to burn and penetrate the paper 2, but by suppressing the output of this laser beam, the laser beam does not penetrate and As shown in FIG. 4, a concave mark 13 having a depth of 1/2 or 2/3 of the thickness of the paper 2 may be formed.

Since through-holes cannot be made in the sheet 2 in a state where the output of the laser beam is suppressed, processing can be performed in this state without using the slit 5 of the convex cylindrical lens 3 for horizontal perforations.

That is, by processing in the above state, linear concave marks can be formed on the paper 2 instead of horizontal perforations, and the paper can be easily torn at the concave marks 13.

Further, since the laser oscillator 9b for the vertical perforation is made by burning with laser light, there is no possibility of forming a hole on the back side edge of the hole.

Although the optical system for horizontal perforation and the optical system for vertical perforation in the above configuration are not particularly shown, they are incorporated into the machine frame as a condensing processing bed and fixed in a suspended form from a pedestal.

The YAG laser beam is once enlarged in beam diameter using a beam collimator, and is converted into parallel light to improve its focusing ability. 50 for focusing
Fin φ, focal length 75. A lOhm quartz lens was used.

In addition, the beam size of the CO2 laser beam was modified using a copper mask so that the entire width of the paper could be processed.
A concave cylindrical lens 6 with a radius of curvature of 34.5 mm was used.

Each lens has an anti-reflective coating.

The sizes of the horizontal perforations 11 and vertical perforations 12 are changed by the traveling speed of the paper 2 and the laser oscillator 9a.

9b's oscillation frequency f1. f2, pulse width P,.

In the case of P2 and horizontal perforations, this can be done by replacing the slit 5. These changes do not require any special skill.

As described above, the processed paper 2 can be easily cut at the respective perforations or concave traces.

〔Effect of the invention〕

According to the present invention, it is possible to save skill by not requiring skill in handling and adjusting the device for processing cuts such as horizontal perforations, vertical perforations, horizontal grooves, and vertical grooves. In addition, changing the processing specifications can be done easily and quickly by replacing the slit 5 and controlling the oscillation frequency and pulse width of the laser oscillator, saving labor at this time. It is possible to reduce downtime. Furthermore, noise during processing can be eliminated. Further, in the case of perforation, no breakage occurs on the back side edge of the perforation, and no bending directionality is imparted at this portion.

As described above, the cut line processing device according to the present invention is suitable for use in a printing machine that produces a wide variety of products in small quantities, and can improve productivity, reduce costs, and cope with production of a wide variety of products in small quantities.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention. Fig. 1 is an explanatory diagram of the structure of the processing optical system, Fig. 2 is an exploded perspective view of a convex cylindrical lens for horizontal perforations, and Fig. 3 is a diagram similar to Fig. 1. FIG. 4 is an enlarged cross-sectional view taken along the line ①-■, and FIG. 4 is a sectional view of the linear groove. 2 is paper, 3 is a convex cylindrical lens, 4 is a window, 5 is a slit,
6 is a concave cylindrical lens, 7 is an irradiation lens, and 9a and 9b are laser oscillators. Fig. 2 O Fig. 4 Kamibako.

Claims (1)

[Claims] 1. A rod-shaped convex cylindrical lens 3 having a convex cylindrical shape on one side and a slit 5 having a large number of windows 4 arranged in an array on the other side; A concave cylindrical lens 6, which has a cylindrical surface facing the continuous printing paper 2 side and facing the continuous printing paper 2 in the width direction thereof, and has a concave cylindrical surface on one side, is placed on the concave cylindrical surface side of the concave cylindrical lens 6. is provided toward the longitudinal direction of the other side surface of the convex cylindrical lens 3, and this concave cylindrical lens 6
A cut line processing device for continuous printing paper, characterized in that a laser oscillator 9a whose oscillation frequency and pulse width can be adjusted is opposed to the other side. 2. In the continuous printing paper cutting device according to claim 1, the slit 5 is not attached to the other side of the convex cylindrical lens 3;
A cutting line processing device for continuous printing paper, characterized in that a laser beam is made incident over the entire length of the other side of the convex cylindrical lens 3. 3. An irradiation lens 7 consisting of a convex lens with a convex spherical shape on one side is provided on the continuous printing paper 2 with its convex spherical surface facing, and the oscillation frequency and pulse width are set on the other side of the irradiation lens 7. A cutting line processing device for continuous printing paper, characterized in that adjustable laser oscillators 9b are placed opposite each other. 4. An irradiation lens 7 made of a convex lens with a convex spherical shape on one side is provided on the continuous printing paper 2 with its convex spherical surface facing, and a continuous laser beam is emitted from the other side of the irradiation lens 7. A cut line processing device for continuous printing paper, characterized by having laser oscillators facing each other.