JPH01172163A - Splicer - Google Patents

Abstract

PURPOSE:To prevent a sheet from being broken by clamping an old document between a guide roll having a brake control means and a press roll having a pressing force control means, which are disposed between a dancer roll and a mill stand, so as to stop the document in order to prevent abrupt occurrence of a tension in the document. CONSTITUTION:An original document is fed by way of a guide roll 8b which is incorporated with an electromagnetic brake 17 for controlling the brake torque. When a new sheet is spliced to an old sheet, a pressing roll 7 is pressed against the guide roll 8b so as to clamp the old document with the pressing force of the pressing roll 7 being suitably controlled by a pressurizing cylinder 9. Simultaneously, the guide roll 8b is suitably controlled by the electromagnetic brake 17, and accordingly, the old document is decelerated and then to stopped without being broken. Thereby it is possible to splice the new document to the old document.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a splicer that can be used in corrugate machines, printing machines using rolled sheets, food packaging machines, bag making and packaging machines, and the like.

(Prior art) Fig. 6 is a side view of a conventional auto splicer for corrugating machines, and Fig. 7 is a detailed view of section A in Fig. 6, showing a state in which the running paper is stopped by being sandwiched between paper stop bars. FIG. 8 is a side view illustrating a state in which the new base paper is crimped in FIG. 7.

Now, the main components in FIGS. 6 to 8 are the caressing device section 11, the pressing section 3, the cutting section 2, the paper stop section 1, the accelerating roll 6, the pressing roll 7, the dancer roll 5, etc. First, the carriage device section 11 includes a crimp bar 14,
It is composed of a knife 13, a guide roll 4, a paper stop bar 12 on the carrier side, etc., and moves back and forth between a paper splicing position and a gyotsugi preparation position. The pressing unit 3 has a pressing bar 14 at the paper contacting part, and is used to press the old and new base paper over the entire width of the paper during paper splicing. The cutting part 2 has a knife 1 at the tip.
3 is attached to cut the old base paper during paper splicing.

In addition, the paper stop part 1 is connected to a crimp bar 14 at the time of connection.
Since the crimping and cutting with the knife 13 are performed while the old base paper is stopped, the old base paper that is running is stopped. Further, the acceleration roll 6 assists the running of the new base paper after gyotsugi and pulls it out, thereby replenishing the stock amount of base paper in the dancer roll 5. The pressing roll 7 is used to press and bond the paper by the pressure bonding bar 14 during gyotsugi. The pressed portion (width 25 m/m) and the unpressed portion (width 25 m/m) are held and rotated between center idler rolls 8a to be re-pressed and crimped. Further, the dancer roll 5 is a device that stores in advance the amount of base paper required to run during Gitsugi.

Next, to explain the method of the conventional apparatus shown in FIGS. 6 to 8, first, the leading edge of the new base paper unwound from the rolled sheet 10 of the mill roll stand 18 is processed at the Gitsugi preparation position. A double-sided adhesive tape 15 is applied to the front surface, and the back surface is held under suction by a pressure bonding bar 14.

In this state, the leading edge of the new base paper is transferred by the carriage device 11 to the center of the splicer via the conveyance means and is put on standby.

Next, as shown in FIG. 7, the running old paper is stopped at the paper stop section 1 by being held between the paper stop bar 12 and the carriage-side paper stopper 12a, and is cut by the knife 13 at the tip of the cutting section. Ru. After the raw paper is cut, it is pushed out by the pressure bonding bar 14 and pressed against the carriage side pressure bonding bar 14, thereby joining the old and new paper sandwiched between them via the double-sided adhesive tape 15. After the crimp bar 14 returns to its original position, the connected base paper is rotated and pulled by an accelerating roll 6, and passed between the pressing roll 7 and the center idler roll 8a, which are pressurized by an air cylinder 9, thereby making it more reliable. It is crimped.

(Problems to be Solved by the Invention) As shown in FIG. 7, in the conventional device, the running base paper is stopped by being stopped between the paper stop bars 12 and 12a, so the paper between the paper stop bars 12 and 12a is It was necessary to equalize blood pressure in the middle direction. However, adjusting this surface pressure uniformly is difficult and takes a long time (
There were problems such as uneven tension in the running paper, resulting in paper tearing, and problems such as the running paper not stopping and requiring a long time.

Furthermore, when the running paper is pinched by the paper stop bar 12.12a, as shown in Fig. 5, sudden high tension and tension fluctuation occur in the running paper, and this tension fluctuation becomes larger as the line speed becomes faster. However, depending on the grade or flaws of the base paper, problems such as paper breakage and poor lamination in the subsequent process (stepping part) may occur. In addition, when paper breaks occur, it takes a long time to restart the machine, reducing productivity and creating a bottleneck in efforts to improve the speed of connecting lines.

The present invention has been proposed to solve the above-mentioned conventional problems.

(Means for Solving the Problems) Therefore, the present invention provides a device for exchanging old and new base paper, which includes a guide roll having brake torque control means between a dancer roll and a mill roll stand, and a brake torque control means for pressing the guide roll. A paper stop mechanism consisting of a pressing roll with force control means is provided, and this is used as a means to solve the problem.

(Function) When a paper splicing command is issued, the air cylinder is operated and the press roll is pressurized with air by the brake roll, and the running paper is sandwiched between the press roll and the brake roll. At approximately the same time, a brake is applied to the brake roll by an electromagnetic brake, and the traveling paper is decelerated and stopped together with the brake roll. After the running paper stops, the crimping bar and knife operate. Next, after the crimping bar returns to its original position, the brake of the brake roll is released, and after the bonded part of the connected base paper passes between the pressing roll and the brake roll,
The pressing force of the pressing roll is released, and the brake roll becomes a guide roll.

(Embodiments) The present invention will be described below based on embodiments of the drawings. In addition,
The present invention is characterized by a means for stopping the running paper during splicing of the splicer, and the other configurations and functions are the same as those of the prior art, so a detailed explanation of this point will be omitted.

First of all, FIG. 1 shows a first embodiment of the present invention, in which a running base paper is pressed by a pressing roll 7 and a brake roll 8 for paper splicing.
This shows a state in which deceleration and stop are achieved by using b in combination. Now, the first
The main components shown in the figure are a pressing roll 7 having a pressurizing mechanism using an air cylinder 9, and a brake roll 8b having a brake mechanism provided in place of the conventional center idler roll 8a shown in FIG. This brake roll 8b has an electromagnetic brake 17 attached to the end of the roll shaft, and the brake torque of the brake 17 can be controlled by voltage. Further, there is no paper stop part l, which is conventionally attached, and the pressure contact part 3 and knife part 2 are the same as in the past and have the same functions.

Next, a method of stopping the running paper for Gitsugi in the embodiment shown in FIG. 1 will be explained. When the Gitsugi command is issued, the air cylinder 9 is operated via the solenoid valve, the press roll 7 is pressurized with air by the brake roll 8b, and the running paper is sandwiched between the press roll 7 and the brake roll 8b. At approximately the same time, a brake is applied to the brake roll 8b by an electromagnetic brake, and the running paper is decelerated and stopped together with the brake roll 8b. After the running paper stops, press the crimp bar 1 as before.
4. Knife 13 is activated. After the crimp bar 14 returns to its original position, the brake of the brake roll 8b is released, and after the attached portion of the connected base paper passes between the press roll 7 and the brake roll 8b, the pressing force of the press roll 7 is released. is released, and the brake roll 8b becomes a guide roll.

Conventionally, a paper stop bar was used as a method of stopping the running base paper, but the present invention has changed this to a mechanism that uses both the pressing force of the pressing roll 7 and the braking force of the brake roll 8b. . FIG. 4 (present invention) and FIG. 5 (conventional) show actual measurement examples of the glide speed and sheet tension trends when the running paper is stopped for the conventional method and the present invention method. As can be seen from this, it can be seen that in the method of the present invention, sheet tension fluctuations are significantly reduced compared to the conventional method.

Next, FIGS. 2 and 3 show a second embodiment of the present invention, and FIG. 2 shows a second embodiment of the present invention, in which the running base paper is stopped by a combination of a pressing roll and a brake roll, and at the same time, when the base paper is stopped, This shows a state in which the frame supporting this roll system compresses the spring and moves as the tension increases. Further, FIG. 3 shows the state immediately before stopping the running base paper.

The device shown in FIGS. 2 and 3 includes a pressing roll 7 having a pressurizing mechanism using an air cylinder 9, a brake roll 8b having a braking mechanism, a frame (frame) 20 supporting these roll systems, and a spring system. It consists of 19. Note that the nip pressure between the pressing roll 7 and the brake roll 8b can be controlled by air pressure. Further, the brake roll 8b has an electromagnetic brake 1 at the end of the roll shaft.
7 is installed, and the brake torque can be controlled by voltage. In addition, the frame 20 supporting these roll systems has a mechanism that can move in the flow direction (horizontal direction), and one end of the frame 20 is fixed to the splicer body with a spring 19, so that the tension can be adjusted. It has a structure in which fluctuations are absorbed by springs 19.

Next, to explain the operation of this second embodiment, the Gitsugu command causes the air cylinder 9 to
is activated, the pressing roll 7 is pressed into contact with the brake roll 8b, and the running paper is sandwiched between the pressing roll 7 and the brake roll 8b.

Also, at approximately the same time, voltage is applied to the electromagnetic brake 17 of the brake roll 8b, the brake acts, and the running paper stops together with the brake roll 8b. At this time, tension fluctuations occur in the running paper, and the springs 19 between the frame 20 supporting these roll systems and the main frame are compressed and expanded in accordance with the tension fluctuations. That is frame 20
moves to absorb tension fluctuations. Next, after the running paper has stopped, the pressure bonding bar 14 and the knife 13 are
is activated, and the old and new paper are connected. Further, after the crimp bar 14 returns to its original position, the brake of the brake roll 8b is released, and the joint portion of the connected base paper is pressed against the pressing roll 7.
After passing between the brake port and the brake hole 8b, the pressing force of the pressing roll 7 is released, and the brake roll 8b becomes a guide roll.

Next, the connected base paper is rotated and pulled by an acceleration roll 6,
down to line speed. During this acceleration, mill roll stand 1
If the GD2 of the rolled sheet base paper attached to the brake roll 8b is large, the sheet tension between the brake roll 8b and this base paper will increase (paper breakage may occur);
In the present invention, when the tension increases, the frame 20 supported by the spring 19 moves to reduce tension fluctuations, so paper breaks do not occur. As described above, in the second embodiment shown in FIG. 2, as a method for stopping the running base paper, the pressing roll 7 and the brake roll 8b are used.
The frame 20 supporting these is further supported by a spring 19, and is a mechanism for reducing tension fluctuations when the running paper is stopped and tension increases when the connected base paper is accelerated.

(Effects of the Invention) Since the present invention is configured as explained in detail above,
Part of the mechanism of the conventional paper stop bar can be eliminated, thereby eliminating the need for nip pressure adjustment and reducing costs.

In addition, tension fluctuations when the base paper stops during running are reduced.
Since defects such as paper breaks and poor lamination can be reduced, productivity can be improved. Furthermore, since the deceleration rate when the base paper is stopped during running can be controlled to Mflj-, and the tension fluctuation when stopped is small,
Gitsugi is possible at higher speeds.

[Brief explanation of the drawing]

FIG. 1 is a side view of a splicer showing a first embodiment of the present invention, FIG. 2 is a side view of a splicer showing a second embodiment, and FIG. 3 is a side view of a splicer showing a second embodiment of the present invention. side view of section, 4th
The figure is a line diagram explaining when the running paper is stopped by the brake roll and presser roll of the present invention, FIG. 5 is a line diagram explaining the time when the running paper is stopped by the conventional paper stop bar, and FIG. The side views, FIGS. 7 and 8, showing examples are detailed views of the section A in FIG. 6, and are in different operating states. Explanation of main parts of the figure 2-- Cutting section 3-- Pressing section 4- Guide roll 5-- Dancer roll 6- Acceleration roll 7-
- Pressing roll 8b - Brake roll 9 - Air cylinder 10 - Rolled base paper 11 - Carriage device section 1
3 - Knife 14 - Crimp bar 16 - Suction box 17 - Electromagnetic brake device 19 - Pane 20 - Movable frame Fig. 2 Fig. 3

Claims (1)

[Claims] In a device for exchanging old and new base paper, a base paper stopping mechanism is provided between a dancer roll and a mill roll stand, consisting of a guide roll having a means for controlling brake torque, and a pressing roll having a means for controlling a pressing force against the guide roll. A splicer featuring: