JP2665027B2 - Protective paper peeling device for rotary printing press - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for peeling protective paper from an adhesive member attached to a V-shaped skin of a web roll before splicing, in a paper feeder of a rotary printing press. It is.

[Conventional technology]

FIG. 3 shows a sheet feeder having three arms of a newspaper rotary press.

The paper feeder includes a main shaft 2 rotatably supported by bearings of a pair of Y-shaped machine legs 1, a pair of main shafts 2 rotatably engaged with the main shaft 2, and movably mounted in the axial direction. Each of the three arms includes a support shaft 4 provided at the end of each of the three arms 3 and the three arms 3 and a paster arm 5 for splicing, and is disposed at intervals of 120 °. Moves sequentially to the splicing position P, the web-loading position Q, and the standby position R every approximately 120 ° of rotation of the main shaft 2.

In FIG. 3, immediately after the completion of the splicing, the web A at the splicing position P is fed from the web A for printing and the diameter thereof is reduced to a predetermined diameter. It shows a state in which it has been rotated by 120 ° and moved to the position Q of the web paper winding apparatus.

Also, at the paper splicing position P, the web B at the standby position R before the rotation of the three arms 3 has come, and the web A at the web mounting position Q is about to be spliced to the web B. .

The protective paper of the adhesive member affixed to the V-shaped skin of the web used for the paper splicing is manually peeled off at the web mounting position Q or the standby position. Further, the protective paper may be removed by the automatic paper roll tailoring device, and the protective paper may not be present when the paper is attached to the paper feeding device.

[Problems to be solved by the invention]

If the protective paper is peeled off manually after being mounted on the three arms of the paper feeder, the work space is poor because the space around the paper feeder is narrow, and there is also incomplete peeling of the protective paper and forgetting to peel it off. Also, if the protective paper is peeled off before mounting the paper roll on the paper feeder, or the protective paper is peeled off at the position where the paper roll is mounted, there is a feasible time before splicing, depending on the printing speed and the diameter of the paper roll. Therefore, the surface of the adhesive member may be dried, or paper dust or foreign matter may adhere to the adhesive member, and the adhesive strength may be reduced.

[Means for solving the problem]

The protective paper is automatically peeled off immediately before the splicing operation in order to stop the inefficient manual peeling of the protective paper and to prevent the adhesive surface of the adhesive member from drying and the adhesive strength from being reduced due to the adhesion of paper powder or the like. Therefore, 1) a knife having one elastic thin blade is provided,
Also, a plurality of sets of means corresponding to the entire width of the web and maintaining a constant distance from the web surface close to the front and rear ends of the knife so as not to cover the tip tape are provided, and the sensor is used to peel off the adhesive member. The air cylinder in the initial position is selectively actuated so that the knife at the beginning of peeling is bent.

2) A pair of attachment / detachment mechanisms for bringing the protective paper peeling device into contact with the surface of the web are provided at both ends of the peeling device. Each attachment / detachment mechanism is composed of a pair of parallel links of equal length and short length.
An actuator for moving the peeling device is attached to one pin of the short link, and the protective paper peeling device is swingably attached to the other pin.

[Action]

1) The knife at the position is bent by the air cylinder selected by the sensor so that the tip of the knife at the position of the adhesive member having the protective paper to be peeled is at a fixed distance from the surface of the web. . The outer peripheral surface of the web is hardened by means for maintaining a constant distance between the knife and the skin of the web provided near the bending knife. When turning over the tip of the protective paper of the adhesive member and starting to rotate the paper at a slow speed, the pressure of the air cylinder is discharged and the pressing force of the knife holder is eliminated,
Since the protective paper is peeled off by the elastic restoring force of the knife, the adhesive surface of the adhesive member is not scratched.

2) A pair of attachment / detachment mechanisms composed of parallel links are operated by respective air cylinders, and the pressures of the left and right air cylinders are adjusted according to the diameter and width of the web and the mounting position in the axial direction. In addition, it is possible to prevent the occurrence of different twists on the left and right of the protective paper peeling device pressed against the skin of the web, and to press the skin of the web to be peeled with a uniform force.

〔Example〕

FIG. 1 shows a protective paper peeling device of a rotary printing press according to the present invention, and FIG. 3 shows a state in which a protective paper peeling device and a device for attaching and detaching the device to and from a web are provided in a standby device.

A pair of Y-shaped machine legs 1 of the paper feeder or a pair of attachment / detachment mechanisms 20 and 20 'are respectively provided in the vicinity of the pair of Y-shaped machine legs 1 and a V-shaped web of a web mounted between the two mechanisms 20 and 20'. The protective paper peeling device 10 in contact with the skin comprises a pair of channels 11, 1
The roller 13 is rotatably supported by a bracket 12 attached to 1 ′ and the channel 11, a plurality of small air cylinders 14 fixed to the channel 11, and a support bar 15 connecting both sides of a pair of channels. A shaft 16 movably supported,
Lever 17 mounted on shaft 16 in the same number as small air cylinders 14
A knife 18 of a thin spring plate which has the same width as the maximum web width and is pressed by the lever 17 to bend toward the web, and a roller 19 rotatably supported by the support bar 15. . The protective paper peeling device 10 has an operating position (which can be changed according to the diameter of the web) and a non-operating position where the peeling operation is not performed by the attaching / detaching mechanisms 20 and 20 'shown in FIG.

Next, the attachment / detachment mechanisms 20 and 20 '(hereinafter referred to as 20) respectively include a pair of long parallel links 21 and 21a having the same length, a short link 22 for swingably connecting these links 21 and 21a, and a long parallel link 21 and A pin 23 of a short link 22 is composed of an air cylinder 21a having a swing support point 21a.
A support bar 15 is attached to the other pin 26 of the protective paper peeling device 10 via a repulsive member (not shown) such as a spring. When the attachment / detachment mechanism 20 or 20 'is in the operating position, the protective paper peeling device 10 comes into contact with the V-shaped skin of the paper roll to perform the protective paper peeling operation. However, the bending of the tip of the knife 18 can be adjusted by the bending characteristics of the knife 18 of the above-described protective paper peeling device 10 irrespective of the turning torque of the links 21 and 21a for this contact, and the protective paper peeling device 10 does not operate. Even if the three arms 3 rotate unexpectedly while moving to the position, the protective paper peeling device 10
Since the support bar 15 is swingably mounted, it can return to the inoperative position while escaping from the web.

Next, the plurality of pairs of rollers 13 and 19 have means for keeping the distance between the web cover and the knife constant so as to correspond to the entire width of the web, and so as not to be applied to the leading end tape. The outer periphery of the web around the tip of the knife 18 is pressed down so that the tip of the knife at the position where the adhesive tape is started to be turned at a predetermined interval from the skin of the web is pressed.

Further, depending on the width of the web and the mounting position thereof, a roller provided at the peeling portion so that non-uniform distortion (twist) or the like does not occur in members of the peeling device 10 and the attaching / detaching mechanism 20 which come into contact with the web.
The operating pressure of the air cylinders 25, 25 'is changed by sensors (not shown) at the same positions as the positions 13 and 19 so as to obtain uniform distortion. In addition, the turned-up protection paper falls downward by its own weight, and is discharged by the protection paper recovery conveyor 27.

At the standby position R, a driving device for acceleratingly rotating the support shaft 4 supporting the web at the paper splicing position P, and a support shaft 4 for controlling the tension of the web at the paper splicing position P and the web mounting position Q. A simple type swinging device and a brake device having the same structure as the brake device acting on the vehicle are provided. So knife 18
When the leading edge of the protective paper is turned, the web can be stopped by rotating the web in the direction of the arrow in FIG. 5 slowly and peeling off the entirety of the protective paper.

4 to 6, 31 is a double-sided adhesive tape, 32
Is a tip tab, and 33 is a protective paper.

〔The invention's effect〕

The present invention relates to a protective paper peeling device which is installed in a paper feeding device of a rotary printing press and removes a protective paper of a double-sided adhesive tape attached along a V-shaped edge of a web surface prior to splicing. A knife made of an elastic thin plate, a plurality of pressing members arranged in the width direction of the web to press the side surface of the knife to press the tip of the knife against the web surface, and the knife and the pressing member to the web surface. A plurality of sets of a detachable mechanism for approaching or detaching and a means for keeping a constant distance between the web surface and the knife are arranged in the width direction of the web, and selectively controlling the pressing member at a position where peeling is started. The following effects are obtained by the configuration in which the protective paper is peeled.

(1) Selectively operate the air cylinder at the position where peeling of the protective paper of the adhesive member is started, and bend it so that the distance between the tip of the knife and the outer surface is almost constant, so that the protective paper is separated smoothly. Can be.

(2) When the protective paper peeling device comes into contact with the paper roll, a sensor disposed at the position of the roller is used to prevent the twisting or bending of the paper from being biased. By changing the pressure of the cylinder, it is possible to equalize the torsion and bending of the protective paper peeling device and the force abutting on the skin of the web.

(3) Even if the three arms are erroneously rotated during the movement of the protective paper peeling device to change the operating position, the protective paper peeling device can be smoothly retracted without collision with the paper roll.

(4) As described above, the protective paper is securely peeled off, and even if the three arms rotate, there is no damage to the web paper and the three arms.

[Brief description of the drawings]

FIG. 1 is a side view of a protective paper peeling device according to an embodiment of the present invention, FIG. 2 is a side view of the same attaching / detaching mechanism, and FIG. 3 is a paper feeder provided with the protective paper peeling device of FIG. FIG. 4 is a side view showing a state in which the width of the web at the V-shaped end of the web mounted on the three arms of the paper feeder and the state according to the mounting position are shown;
FIG. 5 is a perspective view of the V-shaped end of the web, and FIG. 6 is a sectional view taken along line xx and yy of FIG. 13,19 Roller, 14 Air cylinder 17 Lever, 18 Knife 20 Mounting mechanism

Claims (1)

(57) [Claims] 1. A protective paper peeling device which is installed in a paper feeding device of a rotary printing press and removes a protective paper of a double-sided adhesive tape attached along a V-shaped edge of a web surface of a web prior to splicing. A knife made of an elastic thin plate, a pressing member that is arranged in the width direction of the web and presses a side surface of the knife to press the tip of the knife against the web skin,
A plurality of sets of a detachable mechanism for moving the knife and the pressing member toward or away from the web cover and a means for keeping a constant distance between the web cover and the knife are arranged in the width direction of the web,
A protective paper peeling device for a rotary printing press, wherein the pressing member at a position where peeling is started is selectively controlled to peel the protective paper.