JPH0665479B2 - Horizontal cutting machine for continuous printing paper - Google Patents

Description

The present invention relates to a continuous printing paper such as a continuous slip paper printed by a foam printing machine or the like, and the continuous printing paper is easily formed at a predetermined position in the longitudinal direction. The present invention relates to a continuous perforated cut sheet processing device for processing horizontal perforations and linear concave recesses that can be cut into small pieces.

[Conventional technology]

Among the above-mentioned conventional horizontal-cutting-edge processing apparatuses, an apparatus for processing horizontal perforations on continuous printing paper has a plate-shaped processing blade having a perforation processing blade attached to one of two rollers that are in rolling contact with each other. A perforation was processed at a predetermined position of a continuous printing paper that passes between both rollers with a blade.

In addition, as a device for processing lateral concave marks on continuous printing paper,
Similar to the processing perforation for the horizontal perforation, a pressing processing blade having a plate-like and linear blade is used, and this processing blade presses a continuous printing paper to process a lateral concave mark on it. Was there.

[Problems to be Solved by the Invention]

In the conventional transverse cut sheet processing apparatus for continuous printing paper, it is troublesome to attach / detach the processing blade to / from the holding member such as the roller, and there is a problem that a skill is required to attach the blade particularly requiring precision.

In addition, when changing the processing specifications such as the processing interval, it is necessary to replace the entire holding member such as the roller, which is a troublesome work, and the down time of the printing machine becomes long because the conversion work takes a long time. Therefore, there was a problem that the operating efficiency deteriorated.

Further, since the processing by the above-mentioned conventional apparatus is mechanical processing, noise is generated during the processing, which is one of the noise sources in the printing work.

In addition, in the case of horizontal perforation processing or horizontal concave mark processing with a horizontal perforation processing blade or pressing processing blade,
Burrs are generated on the back side edge of the horizontal perforation, or by pressing with a pressing blade, the perforation directionality that the perforation of the horizontal perforation or the lateral concave mark is easily bent to the front side is given. There has been a problem that processing on the downstream side of the lateral concave mark processing portion, for example, folding processing by a folding machine is adversely affected.

The present invention has been made in view of the above, handling of the transverse cutting machine, and adjustment is not required, and skill saving can be achieved, and the processing specifications can be easily changed.
In addition, it can be done in a short time, labor saving at this time, downtime of the printing machine can be shortened, noise during processing can be eliminated, and in the case of horizontal perforation processing Since there is no burr on the back side edge of the perforation and the pressing force does not act in the case of lateral concave mark processing, the bending direction at this horizontal perforated part and the lateral concave mark processed part It is an object of the present invention to provide a lateral cut stitch processing device for continuous printing paper in which the property is not imparted.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a horizontal cut stitch processing device for continuous printing paper according to the present invention is a rod-shaped convex cylindrical lens whose one side has a convex cylindrical shape, and the convex cylindrical surface side of this is the continuous printing paper side. , A concave cylindrical lens having a concave cylindrical surface on one side, and facing the width direction of the convex cylindrical lens, with the concave cylindrical surface side facing the longitudinal direction of the other side surface of the convex cylindrical lens. Provided,
A laser oscillator whose oscillating frequency and pulse width are adjustable is opposed to the other side surface of the concave cylindrical lens.

In the above structure, a slit having a large number of windows arranged in an array is attached to the other side surface of the convex cylindrical lens.

[Work]

When laser light is incident on the concave cylindrical lens from the laser oscillator, the laser light is magnified in a band shape only in the width direction of the continuous printing paper and is incident on the convex cylindrical lens. Then, this laser light is condensed by the convex cylindrical lens and linearly condensed and irradiated on the continuous printing paper, and the continuous printing paper is burned linearly. At this time, the combustion is incompletely performed by suppressing the output of the laser beam, and linear concave marks are laterally processed into grooves on the continuous printing paper.

On the other hand, in a configuration in which a slit having a large number of windows arranged in an array on the other side of the convex cylindrical lens is attached, the laser light passes through the slit in an array and then is collected by the convex cylindrical lens. The continuous printing paper is illuminated and condensed and irradiated in a dotted line on the continuous printing paper, and the continuous printing paper is burned in a dotted line to form horizontal perforations by the combustion holes.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In the figure, 1a and 1b are rollers for guiding a continuous printing paper (hereinafter, simply referred to as paper) 2, and the rollers 1a and 1b are processing parts such as a form printing machine and a folding machine (neither is shown).
It is arranged between. Reference numeral 3 denotes a convex cylindrical lens formed on one side surface in a convex cylindrical shape and having a length substantially equal to the width of the paper 2. The convex cylindrical lens 3 is arranged above the sheet 2 by a predetermined distance, and is arranged so that its cylindrical surface faces downward and is parallel to the width direction of the sheet 2.
On the upper surface of the convex cylindrical lens 3, a slit 5 having a large number of windows 4 arranged in an array in the longitudinal direction is attached. The slit 5 is made of a copper plate. Reference numeral 6 denotes a concave cylindrical lens whose one side surface has a concave cylindrical shape. The concave cylindrical lens 6 is arranged above the convex cylindrical lens 3 with its concave arc surface facing downward, and at the same time, this concave arc surface is convex cylindrical lens. 3 are arranged to face each other in the longitudinal direction.

Reference numeral 7 denotes an irradiation lens constituted by a convex lens having one side surface made into a spherical shape. The irradiation lens 7 is arranged so as to face a vertical perforation position having a predetermined size from one side edge of the paper 2.

On the light incident side of the convex cylindrical lens 3 and the irradiation lens 7, the laser oscillators 9a and 9b for the horizontal sewing machine and the vertical sewing machine are opposed via front reflecting mirrors 8a, 8b and 8c. These laser oscillators 9a, 9b
Can oscillate the laser light in a pulsed manner, and the oscillation frequency and pulse width can be arbitrarily set. A CO ₂ laser was used for the horizontal perforations, and a YAG laser was used for the vertical perforations.

In the above configuration, the laser light from the laser oscillator 9a for the horizontal perforation is incident on the concave cylindrical lens 6 via the total reflection mirrors 8a and 8b, and the laser light is expanded here only in the width direction of the paper 2. Then, this laser light is incident on the convex cylindrical lens 3, where it is condensed linearly and is irradiated onto the paper 2. At this time, since the slits 5 provided with a large number of windows 4 are attached to the incident side of the convex cylindrical lens 3, the laser light is incident on the convex cylindrical lens 3 in a continuous array shape, and each of the array shapes is changed. The laser light is condensed in a dotted line by the convex cylindrical lens 3. The paper 2 is momentarily burned by the focused laser light and has a hole 10 as shown in FIG. 3. Therefore, the paper 2 has lateral perforations 11 in the width direction as shown in FIG. Machined without burr on the part.

Since the paper 2 is actually traveling at a predetermined speed,
The laser light is pulsed for a very short time according to this speed. The interval L 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.

That is, as the condition of the horizontal perforation processing, the paper width is 33
0 mm, horizontal perforation spacing L is 300 mm, paper 2 running speed is 9000
When mm / s is set, the oscillation frequency f ₁ of the laser oscillator 9a for the horizontal perforation is f ₁ = 9000/300 = 30 Hz. If the width W of the laser light focused on the paper 2 is 0.2 mm and the width W of the transverse perforated paper 2 in the running direction is 0.4 mm, the paper is irradiated while the laser light is being radiated. Since 2 should move 0.2 mm, the pulse width P ₁ of the laser light at this time is P ₁ = 0.2 ÷ 9000 = 22 μs.

On the other hand, the laser light from the laser oscillator 9b for the vertical perforation is incident on the irradiation lens 7 via the total reflection mirror 8c, is condensed there, and is irradiated onto the paper 2. At this time, the laser oscillator
9b oscillates with a fine frequency and with a fine pulse width, so that the laser beam is irradiated in a dotted line as the sheet 2 travels, and as a result, only the part irradiated with the laser beam burns and the dotted line hole in the sheet 2 Aki, vertical perforation 12 is processed.

At this time, the length of the holes in the vertical perforations 12 is 2 mm and the length between the holes is 1
mm, the oscillation frequency f ₂ of the laser oscillator 9b and the pulse width
The traveling distance l of P ₂ and paper 2 is f ₂ = 9000 / (2 + 1) = 3000 Hz P ₂ = 160 ns l = 9000 × 160 × 10 ⁻⁶ = 1.44 μm. As the irradiation lens 7, a combination of a spherical lens capable of condensing (2 × 0.2 mm ² ) and a convex cylindrical lens is used.

As described above, the lateral perforations 11 having a width W of 0.4 mm are machined at intervals of L in the traveling direction of the sheet 2 as described above, and the length of the hole is 2 mm at the edge of the sheet 2. Hole spacing is 1
The vertical perforations 12 of mm are continuously processed.

In the above embodiment, the energy of the laser light of each laser oscillator 9a, 9b needs to be large enough to burn and penetrate the sheet 2, but the output of this laser light should be suppressed. Therefore, the laser beam may not be penetrated, and a concave mark 13 having a depth of 1/2 or 2/3 in the thickness direction of the sheet 2 may be formed as shown in FIG.

Since the through hole cannot be formed in the sheet 2 in the state where the output of the laser beam is suppressed, the sheet 2 can be processed in this state without using the slit 5 of the convex cylindrical lens 3 for the horizontal perforation.

That is, by processing in the above-described state, it is possible to form linear concave marks on the sheet 2 instead of the horizontal perforations.
It can be easily torn at the 13th part.

Further, since the laser oscillator 9b for vertical perforations can be opened by burning with laser light, no burr can be formed on the back side edge of this hole.

The optical system for processing the horizontal perforations and the optical system for processing the vertical perforations in the above-mentioned configuration are not shown in the drawing, but they are incorporated into the machine frame as light-concentrating processing beds and fixed in a form suspended from the frame.

The beam diameter of the YAG laser light is once expanded by a beam collimator, and it is made into parallel light to improve the light condensing property. 50 mm for focusing
A quartz lens with φ and a focal length of 75,100 mm was used.

Further, the beam size of the CO ₂ laser beam was modified with a copper mask so that the entire paper width could be processed, and a concave cylindrical lens 6 having a diameter of 40 mmφ and a radius of curvature of 34,5 mm was used. A non-reflective coating was applied to each lens.

The size of the horizontal perforations 11 and the vertical perforations 12 can be changed by changing the traveling speed of the paper 2, the oscillation frequencies f ₁ and f _{2 of} the laser oscillators 9a and 9b, the pulse widths P ₁ and P ₂ , and the slits for the horizontal perforations. This can be done by replacing 5. These modifications do not require special skill.

The paper 2 processed as described above can be easily cut at the perforations or the portions where the concave marks are processed.

〔The invention's effect〕

According to the present invention, the horizontal perforation, the handling of the lateral cut processing device for processing the lateral concave mark, and does not require any skill to adjust,
Skill saving can be achieved. Further, the machining specifications can be changed easily by exchanging or attaching / detaching the slit 5, controlling the oscillation frequency of the laser oscillator, and controlling the pulse width, and the labor can be saved at this time. The downtime of the printing machine can be shortened. Further, noise during processing can be eliminated. Furthermore, in the case of horizontal perforation processing, burrs do not occur on the back side edge of the perforation, and in the case of horizontal concave mark processing, the pressing force does not act, so this horizontal perforation processing part,
Also, no bending directionality is imparted to the lateral concave mark processed portion.

As described above, the cut processing apparatus according to the present invention is suitable for use in a printing machine for a large variety of small quantity products, and can improve productivity, reduce costs, and cope with a large variety of small quantity production.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a structural explanatory view of a processing optical system, FIG. 2 is an exploded perspective view of a convex cylindrical lens for a horizontal perforation, and FIG. 3 is III of FIG. FIG. 4 is an enlarged sectional view taken along line -III, 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.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B23K 26/06 Z 7425-4E B26F 3/16 7411-3C

Claims (2)

[Claims] 1. A rod-shaped convex cylindrical lens 3 having a convex cylindrical shape on one side thereof, with its convex cylindrical surface facing the continuous printing paper 2 side and facing the continuous printing paper in the width direction thereof. The concave cylindrical lens 6 is provided and one side surface is a concave cylindrical surface.
Is provided with the concave cylindrical surface side thereof facing the longitudinal direction of the other side surface side of the convex cylindrical lens 3, and on the other side surface side of the concave cylindrical lens 6, it is possible to adjust the oscillation frequency and the pulse width. A continuous cutting paper lateral cut processing device characterized by even facing each other. 2. A rod-shaped convex cylindrical lens 3 having a convex cylindrical surface 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 facing the continuous printing paper 2 and facing the continuous printing paper in the width direction of the continuous printing paper, and one side surface of which is a concave cylindrical surface, the concave cylinder side of which is the convex cylinder. A continuous printing paper characterized in that a laser oscillator 9a having an adjustable oscillating frequency and pulse width is provided to face the other side of the concave cylindrical lens 6 provided in the longitudinal direction of the other side of the lens 3. Horizontal cutting machine.