JP2501751B2 - Punching equipment for rotary printing press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device for a rotary printing press which punches continuously fed roll paper without stopping the feeding.

[0002]

2. Description of the Related Art An apparatus is known in which a roll paper is continuously fed by a rotary printing machine to print on a required portion of the roll paper, and the product is punched to produce a printed product. In such a device,
Since the printer side is continuous feed, the plate cylinder must be replaced depending on the shape of the printed matter. A commonly used technique is to use a die-cut cylinder having the same diameter as the plate cylinder. This technique is very expensive because the blade is engraved on the die-cut cylinder. For this reason, it has been proposed to perform punching while moving the punching device itself, which uses a plate-shaped blade instead of a cylinder, at the same speed and in the same direction as the roll paper.

As an example of a manufacturing apparatus of such a system,
For example, there is one disclosed in Japanese Examined Patent Publication No. 4-8220. This manufacturing apparatus includes a paper feed unit that feeds roll paper, a printing device that performs the required printing on the paper, a punching unit that punches the printed portion, and a paper discharge unit.

The punching section is guided by a slide plate (anvil) which is guided by a guide base provided on the lower surface side of the roll paper and reciprocates in the feed direction of the roll paper, and a guide post which is erected on the slide plate. A punch plate (blade) that moves up and down with respect to the roll paper on the upper surface side of the roll paper is provided, and the slide plate is driven by a crank mechanism and the punch plate is driven by a cam mechanism.

[0005]

However, in the method of punching while moving the punching device itself, it is difficult to smoothly move a heavy object at high speed, and it is difficult to punch with high speed and high precision. . Further, there are various problems such that the speed ratio of the drive gear must be changed in order to synchronize the moving speed of the punching part and the rotational speed of the punching with the plate cylinder.

In view of the above-mentioned problems of the conventional punching device for printed matter, the present invention makes it possible to control the size of the plate cylinder in the electronic control unit without moving such a heavy object and without changing the gear according to the plate cylinder. Input,
An object of the present invention is to give instructions from the arithmetic unit to the punching device and the stepper to temporarily stop the movement of the roll paper and perform punching with high speed and high precision.

[0007]

As means for solving the above problems, the present invention provides roll paper advancing and retracting means via a pair of inlet and outlet gate rolls provided with roll paper having a constant feed speed at predetermined intervals. The roll paper advancing / retracting means comprises a pair of guide rolls provided at a predetermined distance position from the gate roll near the front and rear ends of the supporting frame to guide and support the frame body so as to be movable back and forth by the guide means. A cutting blade is fixed on one side of the roll paper in the frame body, and a receiving member of the cutting blade is arranged on the opposite side so as to be movable up and down through a crank mechanism, and the frame body of the roll paper advancing / retreating means is arranged on the roll paper. The punching device of the rotary printing press is configured to retreat in synchronism with the feeding speed of the sheet, and during that period, the receiving member of the cutting blade is synchronously driven to punch a predetermined portion of the roll paper.

[0008]

According to the punching device of the present invention configured as described above, the roll paper on which patterns such as labels are continuously printed in the preceding printing section is fed at a constant speed, and the roll paper including the printed portion is fed. Is stopped for a short time by the roll paper advancing / retreating means, and punching is performed in the meantime.

The roll paper advancing / retreating means advances / retreats while supporting the roll paper by the guide rolls in front of and behind it. While the advancing / retreating means is being moved in the opposite direction at the same speed in synchronism with the feed speed of the roll paper, the advancing / retreating means is driven so that the printing portion is just located on the lower surface of the cutting blade. At the same time, the raising and lowering of the receiving member of the cutting blade is synchronized with the crank mechanism so that the receiving member is raised so as to abut the cutting blade during the period.

Since the supporting point of the roll paper moves backward by the advancing / retreating means, the roll paper is moved forward in the advancing / retreating means.
When viewed from the stationary system, the roll paper is in a state in which the feed is stationary for a short time. Therefore, when the punching operation is performed to punch out the printed portion of the roll paper, the roll paper is fed in the next operation, and the next printed portion approaches the punching position again. In this way, punching of the printed portion is successively performed one after another.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic configuration diagram of a printing punching device of an embodiment. In the apparatus of this embodiment, a label is printed, a predetermined portion of the label is punched, and the label is manufactured in a continuous form.
The paper used in this example is a release paper coated with a pressure sensitive adhesive coated label paper. The illustrated print punching device includes a paper feed unit 1 for feeding paper from roll paper, a printing unit 2 for printing a label pattern in multicolor on the paper, a punching device 3 for punching the printed label portion,
A discharge unit 4 is provided for separating the discharged paper into scraps and label paper and winding them up.

The paper is fed from the paper feeding unit 1 so that the printing unit 2 continuously prints at a constant speed, so that the feeding roll 5 and the discharging unit 4 are used.
A motor (not shown) for driving the take-up drum is synchronously driven. The printing unit 2 shown in the drawing is capable of performing multicolor printing of four colors, but may be one in which, for example, a printing unit of six colors is arranged around the impression cylinder. The paper fed at a constant speed by the feed roll 5 is the gate roll 3 at the entrance and the exit.
It is sent to the punching device 3 via 1a and 31b and discharged.

The punching device 3 includes gate rolls 31a, 31a.
A stepper 32 provided at a predetermined distance from b is provided with a cutting blade 40 fixed to the upper surface side of the paper in its frame, and a receiving member (anvil) 43 for the cutting blade is vertically movable on the lower surface side. There is.

FIG. 2 is a plan view of the punching device 3, and FIG. 3 is a sectional view taken along the line III-III of FIG.

As shown in FIG. 2, the stepper 32 comprises a pair of guide rolls 34 provided in the vicinity of the front and rear ends between a pair of parallel guide frames 33, and an arm provided on the side of the guide frame 33. At least four mounted slide bearings 35 are supported by a guide shaft 36 so as to be guided. A ball screw 38 is provided in a screw fitting portion 37 attached to an arm separately provided on the side of the guide frame 33, and the ball screw 38 is rotationally driven by a servo motor 39 so that the stepper 32 can be horizontally moved. There is.

As shown in FIG. 3, the cutting blade 40 provided on the upper surface side of the paper W passing between the pair of guide rolls of the stepper 32 is fixed to the cutting blade base 41 via the fixed board 42, and the cutting blade base 41 is fixed. 41 is fixed to a support structure (not shown). The receiving member 43 on the lower surface side of the paper W has a crank arm 44 rotatably connected to the lower surface thereof connected to a crank mechanism 45, and this is driven by a servo motor 46 to receive the receiving member 43.
Can be raised and lowered freely. The fixed board 42 is shown in FIG.
In FIG. 4, the illustration is omitted for the sake of clarity.

The punching drive servomotor 46 for raising and lowering the receiving member 43 receives a speed command from the servomotor on the printing press side and is driven in perfect synchronization with the speed of the printing press.
Further, the servomotor 39 for driving the stepper 32 is also driven in synchronization with the printing machine in the same manner as for the punching drive, and the movement speed is also the same.

The operation of the printing / punching device of the embodiment having the above-mentioned structure will be described with particular emphasis on the punching device 3.

In the printing unit 2, label printing is continuously performed at a constant speed, so that the paper W on which printing has been completed is fed by the feed roll 5 at a constant speed. Paper W on the punching device 3
When is fed through the entrance gate roll 31a, the label printing portion at the predetermined position is punched.

A specific punching action of the punching device 3 will be described with reference to FIG. Now, tentatively, the guide rolls 34, 34 of the stepper 32 are located just above the entrance and exit gate rolls 31a, 31b, and at this time, the center in the length direction thereof coincides with the centers of the cutting blade 40 and the receiving member 43. I shall. Further, the guide rolls 34, 34 of the stepper 32 are
The entrance compared to the distance that the stepper 32 moves in the front-back direction,
It is assumed that the gate rolls 31a and 31b at the exit are at a sufficiently large length position.

Assuming that the stepper 32 moves forward by a predetermined distance as shown in FIG. 4A, the distance between the entrance and exit gate rolls 31a and 31b and the guide rolls 34 and 34 before and after the stepper 32 is the same as described above. It will be longer than when it was in the center position. Therefore, the length of this extension is adjusted between the exit gate roll 31b and the winder of the discharge section 4 (the length adjusting device is not shown).

In this state, it is assumed that the label printing portion X has not yet entered the section of the cutting blade 40. From this state, the paper W is fed at a constant speed V, and in synchronization with the same speed, the stepper 32 is moved backward in the opposite direction. Stepper 32
Moves at the same speed in the direction opposite to the moving direction of the paper W,
When viewed in a stationary system with the cutting blade 40 fixed, the label-printed portion X of the paper W is stationary in the state shown in FIG.

On the other hand, the receiving member 43 moves up and down by the crank mechanism 45, but is still below the lower surface of the paper W in the state of FIG. 4A, and the stepper 32 is in the central position in the state of FIG. To a position where it contacts the lower surface of the paper W for a short period of time until it rises before passing to the center position. At this time, since the feeding of the paper W is stationary, the paper W is sandwiched between the receiving member 43 and the cutting edge 40 by the rising of the receiving member 43, and the printing portion X
Is punched.

After that, as shown in FIG.
Retreat from the central position, the receiving member 43 also descends, and in step (b), the stepper 32 returns to the central position and the receiving member 43 reaches the bottom dead center. During that time, the paper W continues to be fed at a constant speed, and the printing portion X advances from the position of the cutting edge 40. In this way, the next print portion X is punched and moved at a constant interval again by the same action.

[0025]

As described in detail above, the punching device of the present invention is a means for moving the paper in the opposite direction in synchronism with the roll paper fed at a constant speed so that the paper feed is stopped for a short period of time and a fixed cut is made in the meantime. Since the paper can be punched by sandwiching the paper with the blade and the receiving member, it is possible to perform high-precision punching without the machine being overpowered by simply moving the advancing and retracting means that is simple, light, and has little inertia. Since it is not necessary to move the heavy cutting blade and the receiving member in the paper moving direction, there is an advantage that the device configuration is simplified and the cost can be significantly reduced.

Moreover, the preparation time can be shortened by relieving the operator from troublesome work such as gear replacement and adjustment, and there is no reduction in punching precision due to gear assembly error or the like.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of a printing / punching apparatus according to an embodiment.

FIG. 2 is a plan view of a punching device.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is an explanatory diagram of operation

[Explanation of symbols]

 1 Paper Feeding Part 2 Printing Part 3 Punching Device 4 Ejecting Part 5 Feed Roll 31a Inlet Gate Roll 31b Outlet Gate Roll 32 Stepper 33 Guide Frame 34 Guide Roll 35 Slide Bearing 36 Guide Shaft 37 Screw Fitting 38 Ball Screw 39 Servo Motor 40 cutting blade 41 cutting blade base 42 fixed board 43 receiving member 44 crank 45 crank mechanism

Claims (1)

(57) [Claims] 1. A roll paper having a constant feed speed is fed to a roll paper advancing / retreating means via a pair of inlet and outlet gate rolls provided at a predetermined interval and discharged, and the roll paper advancing / retreating means is predetermined from the gate roll. At a distance position, a pair of guide rolls are provided near the front and rear ends of the support frame to guide and support the frame body so that it can be moved back and forth by guide means, and a cutting blade is fixed on one side of the roll paper in the frame body. In addition, a receiving member of the cutting blade is arranged on the opposite surface side so as to be able to move up and down through a crank mechanism, and the frame body of the roll paper advancing / retreating means is retreated in synchronism with the feed speed of the roll paper. A punching device for a rotary printing press, which is configured so as to synchronously drive a receiving member to punch a predetermined portion of roll paper.