JPH11268852A - Method and device for preventing scattering of tale part of remaining paper in unreel machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably recover the all amount of remaining paper by preventing a tale part of the remaining paper from being torn off and scattered in an automatic splice process of an unwinder in a papermill. SOLUTION: Nozzles N2 for jetting high-speed air and a guide plate G are approached to a former paper roll R1, high-speed air is jetted from the nozzles N2 in the opposite direction to the rotational direction of the former paper roll R1 and along the guide plate G, the tip of tale paper is drawn, and high- speed air in the opposite direction to the rotational direction of the former paper roll R1 is blown from also an upper nozzle N1. Therefore, the tale part of the former paper is prevented from being torn off and scattered, and the all amount of remaining paper can be reliably recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical device in a paper mill, a printing factory, and the like.

[0002]

2. Description of the Related Art In a paper mill or a printing plant, an unreel machine is used to apply resin to the surface of paper or to print on the surface of paper in order to improve printability of paper. Feed the paper to a coating machine or printing machine. In the operation of a coating machine or a printing machine, it takes time to adjust the coating amount of the coating material, the color of the printing ink, and so on. It is the principle of operation to pass paper continuously. One roll of paper is usually 20
In the case of winding in a paper mill or mass printing in a large-scale printing factory,
Since the production lot is larger than a single paper roll, the paper roll is fed to a coating machine or printing machine while connecting the paper rolls. A device for connecting paper rolls is generally called an auto splicer. For example, in the case of a turret type unreel machine, it has a structure as shown in FIG.

In FIG. 2, R1 is a paper roll (hereinafter, referred to as an old paper roll) which feeds a paper sheet to a coating machine or a printing machine, and R2 is a sheet roll which is simultaneously fed with the old paper roll R1. This is a new paper roll which is waiting so as to be able to be fed out, and both are attached to both ends of the turning arm A1 so as to face each other. In a normal operation state in which the old paper roll R1 feeds out the paper, the turning arm A1 keeps a substantially horizontal state as shown in FIG. 2, but when the remaining paper of the old paper roll R1 starts to run out. As shown in FIG. 3, the turning arm A1 is rotated to the left in the drawing, and the pressure roll support arm A2 is also rotated to the left in the drawing, so that the new paper roll R2 is rotated.
And the pressure roll P are brought close to each other, and the new paper roll R2 is rotated to stand by so that the rotational peripheral speeds of both rolls match.

The leading end of the paper of the new paper roll R2 is temporarily fixed to a paper roll at an important point with an adhesive tape, and furthermore, a double-sided adhesive tape is stuck thereon, and the adhesive surface is exposed to stand by. . At the moment when the paper is connected, the timing is taken when the double-sided adhesive tape, which temporarily fixes the leading end of the new paper roll R2, just faces the pressure roll P, and the pressure roll supporting arm A2 or the rotating arm A1 is rotated. Roll P is pressed against new paper roll R2. Then, the old paper unwound from the old paper roll R1 and running along the pressure roll P comes into contact with the adhesive surface of the double-sided adhesive tape of the new paper roll R2, and the leading end of the new paper roll R2 and the old paper come in contact with each other. Are glued together and connected.

At the same time, the paper fed from the old paper roll R1 is cut by a knife, and thereafter the new paper roll R2 is cut.
Is continuously fed to a printing machine or a coating machine, and the turning arm A1 and the pressure roll supporting arm A2
To the position. In addition, the temporary fixing tape which has fixed the important part of the leading end of the paper of the new paper roll R2 to the paper roll of the new paper roll R2 is torn off or peeled off from the paper roll. The above series of operations are automated with almost no human intervention.

[0006]

However, the above-mentioned unreel machine has the following problems. That is, the tail portion of the old paper roll R1 (hereinafter, also referred to as tail paper).
After cutting the old paper roll R1 for a while,
Since the remaining paper roll continues to rotate at a high speed, a part of the tail portion of the remaining paper is torn off and scattered in all directions, and is mixed in the preceding paper manufacturing process and the subsequent printing process. And other problems.

[0007] Even if other processes are not adversely affected, the direction in which the remaining paper scatters is not constant, and the remaining paper scatters over a wide area, so that it must be manually collected.

In order to prevent the remaining paper from scattering, the rotation of the old paper roll R1 is braked at the moment when the paper of the old paper roll R1 is cut, and then the reverse rotation is performed to rewind the remaining paper. However, since the torque applied to the drive shaft of the old paper roll R1 rotating at high speed is extremely large, even if a brake is applied to the rotation of the old paper roll R1,
The rotation cannot be stopped immediately, and it is difficult to stop scattering of the remaining paper. Therefore, it is conceivable to reinforce the shaft portion of the old paper roll R1 to strengthen the brake,
Nevertheless, there is no guarantee that any remaining paper will be scattered.

[0009] In addition, not only the entire machine becomes large, but also the length of the paper roll becomes shorter as the shaft portion becomes thicker, which causes another problem that productivity is reduced.

[0010]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems without reducing productivity.

In the present invention, first, the situation where the remaining paper is scattered is photographed by a high-speed camera and closely observed. As a result, as shown in FIG. 4, the tail portion of the cut paper is bent and loosened. The old paper roll R1 is inverted and wound.

Even in the state where the old paper roll R1 is rotated at a high speed even in a state where the paper is rolled up and reversed, a large centrifugal force is applied to the leading end of the tail paper which is free from being restrained by the roll surface. And pulling force in the direction of rotation
Thereby, it is considered that a part of the end is torn. For example, the speed at which the old paper roll R1 feeds out the paper immediately before the old paper cut is 1000 m / min, and the diameter of the remaining paper is 110 m / min.
m, the rotation speed of the old paper roll R1 immediately after cutting is
The speed is 2894 revolutions / minute (48 revolutions / sec). Even if the brake is operated immediately after the cut, the rotation speed is slightly reduced, but the high-speed rotation is still maintained.

Therefore, it is possible to prevent the tail portion of the remaining paper from being bent, inverted, and wound around the old paper roll R1,
If the entire amount of the remaining paper can be sent out to the paper recycling process and collected, it is possible to prevent adverse effects due to the scattering of the remaining paper, and at the same time, to return the entire remaining paper of the old paper roll R1 to the collection process for recycling without manual operation. be able to.

Therefore, in the present invention, before the paper of the old paper roll R1 being fed is cut and the tail portion is bent and the reversal winding is started, the paper is provided above the old paper roll R1 shown in FIG. The high-speed air injection nozzle N1 and the high-speed air injection nozzle N2 provided near the high-speed airflow guide plate G inject high-speed air in a direction opposite to the rotation direction of the old paper roll R1, and use the force of the high-speed air. , Eliminates paper folds and prevents reverse entanglement,
The traveling direction of the tail portion of the remaining paper, which is going to progress along the rotation direction of the old paper roll R1, is directed to the lower recovery process, and is sent to the recovery process.

If the tail portion of the remaining sheet can be sent to the lower portion, the entire amount of the remaining sheet fed from the old paper roll R1 can be sent to the lower collecting step by gravity.

The principle of the device according to the present invention will be described below.
The high-speed air injection nozzle N2 is substantially parallel to the guide plate surface so that the high-speed air injected from the high-speed air injection nozzle N2 flows substantially parallel along the guide plate G, and in the rotation direction of the old paper roll R1. It is provided to inject in the opposite direction. Incidentally, the angle is suitably about X = 0 to 10 degrees, but the high-speed air injected from the high-speed air injection nozzle N2 also has a function of separating the folded portion from the paper roll. If the angle is sufficient, an angle of about 20 degrees may be adopted.

When the folded portion of the tail reaches the vicinity of the injection hole of the high-speed air injection nozzle N2 due to the rotation of the old paper roll R1, the high-speed air injected from the high-speed air injection nozzle N2 changes the folded portion to the paper roll. However, even if the folded portion passes near the ejection hole of the high-speed air injection nozzle N2, the airflow E2 of the high-speed air flows between the guide plate G and the tail portion of the paper. Since the air pressure at that portion is lower than that on the opposite side of the paper, the tail portion of the paper is drawn to the guide plate G side and is urged to flow downward by the airflow E2. At the same time, the tail portion of the paper also receives the airflow E1 injected from the high-speed air injection nozzle N1 above the guide plate G, and flows more reliably downward.

The high-speed air flow E1 injected from the high-speed air injection nozzle N1 functions to separate the folded portion of the tail paper from the paper roll, similarly to the high-speed air flow E2 injected from the high-speed air injection nozzle N2. Since the leading end of the folded portion has already been drawn by the guide plate G by the high-speed airflow injected from the high-speed air injection nozzle N2, the high-speed airflow E1 injected from the high-speed air injection nozzle N1 is not folded. And reliably applies wind pressure to the folded portion so that the tail paper flows downward.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a normal case, the process of collecting the remaining paper of the old paper roll R1 is installed on the lower floor immediately below the unreel machine, and as shown in FIG. It is injected downward from the high-speed air injection nozzle N1 or the high-speed air injection nozzle N2 installed at the top of
If the collection process is not located directly below the floor but installed at another location, the fuel is injected in that direction. The high-speed air injection should be performed at the same time or immediately after the old paper is cut, and then performed until the remaining paper is smoothly sent out to the collection process.However, the injection start should be started early so that the injection timing is not lost. It is better to keep it.

The high-speed air injection does not need to be performed over the entire width of the remaining paper, but may be performed from several places in the paper width. The higher the injection rate of high-speed air, the more effective it should be.
Since an irregular or unexpected air flow may be generated in the vicinity and the remaining paper may not be smoothly accommodated in the lower collecting process, the number of guide plates and high-speed air jet nozzles to be installed, high-speed air pressure, etc. May be set to be initially large and adjusted so as to minimize waste while performing the actual test.

The length of the remaining paper of the old paper roll R1 to be sent to the recovery step is set in advance in consideration of the time required for connecting the old paper and the new paper. To prevent loss, set the longer the faster the paper is sent out. However, the diameter of the remaining paper in the old paper roll R1 is
Even if the length of the remaining paper is the same, it differs depending on the thickness of the paper. That is, the thicker the paper, the larger the remaining paper diameter, and the thinner the paper, the smaller the remaining paper diameter.

The positions of the high-speed air injection nozzles N1 and N2 and the guide plate G are more effective as the closer to the old paper roll. In particular, if the high-speed air injection nozzle N2 and the guide plate G are too far from the old paper roll, their effects will be drastically reduced. Therefore, it is desirable that their positions can be adjusted according to the diameter of the old paper roll R1. Therefore, the high-pressure air injection nozzles N1 and N2 and the guide plate G are each attached to a movable device such as a cylinder via an attachment, and each attachment is equipped with a distance sensor to measure a distance from the old paper roll R1. The movable device is stopped when approaching a predetermined distance from the old paper roll R1, and when the high-speed air injection nozzle does not require high-speed air injection, these devices are separated from the old paper roll R1 and retracted. In order to set the position to be set, it is desirable to electrically control the distance sensor and the movable device to automatically control the stop position and the retract position of the high-speed air injection nozzles N1 and N2 and the guide plate G.
However, since the retreat position can always be determined at a fixed location, it is not always necessary to detect the retreat position with a distance sensor, and other stop means such as a limit switch may be used.

Also, since the high-speed air injection nozzle N2 and the high-speed air flow guide plate G are used close to each other,
If both are attached to the same attachment, it goes without saying that only one distance sensor and one movable device are required.

The optimum distance between the old paper roll R1 and the guide plate G and the injection port of the high-speed air injection nozzle N2 depends on the injection speed and amount of high-speed air to be injected, but is generally about 20.
It is about 50 mm. Needless to say, the distance may be further increased, but if the accuracy of a device such as a sensor for controlling the movement of the guide plate G is not high, there is a risk of collision with the old paper roll R1. The distance between the old paper roll R1 and the guide plate G is
Since it is also a passage through which the remaining paper passes toward the collection process,
If the width is smaller than necessary, the remaining paper may be caught.

The optimum value such as the injection speed of the high-speed air injected from the high-speed air injection nozzle N1 depends on the number of injection holes, the amount of air injected per unit time, and the distance between the injection holes and the old paper roll R1. . However, if the ejection speed is the old paper roll R
When the peripheral speed is lower than 1, the rotation of the tail paper loses the generated air current, and the effect may not be sufficiently obtained.

Therefore, for example, high-speed air injection nozzles N1 and N2 can be supplied at a rate of about 20 m ³ / min from a high-pressure air pipe of about 5 kg / cm ² , and the flow rate adjusting valve is adjusted while repeating on-site experiments. It is sufficient to reduce the amount of high-pressure air by adjusting the amount of air as much as possible within a range where the remaining paper can be reliably processed.

The number of high-speed air injection nozzles N1 should be set to 1 to 3 per 1 m of paper width, and the number of high-speed air injection nozzles N2 to 2 to 3 times the number of high-speed air injection nozzles N1. Good.

[0028]

By installing the apparatus of the present invention on an unreel machine, the tail portion of the remaining paper can be prevented from being torn off and scattered, and the entire remaining paper can be reliably sent to the recovery step.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of the apparatus of the present invention.

FIG. 2 is an explanatory sectional view of an unreel machine.

FIG. 3 is an explanatory sectional view of an unreel machine.

FIG. 4 is an explanatory view showing a state in which the tail portion of the remaining paper is reversed and entangled;

[Explanation of symbols]

 A1 Swivel arm A2 Pressure roll support arm C Knife G Guide plate R1 Old paper roll (remaining paper roll) R2 New paper roll P Pressure roll N1 High-speed air injection nozzle N2 High-speed air injection nozzle E1 Airflow E2 Airflow

Claims (3)

[Claims] 1. A turret type unreel machine for continuously feeding out a new paper roll (R2) while superimposing a new paper roll (R2) on a paper of an old paper roll (R1). ) Is a method for preventing the tail portion of the remaining paper from scattering. 1. Bring the guide plate (G) and the high-speed air injection nozzle (N2) close to the rotating old paper roll (R1); 2. high-speed air is injected from the high-speed air injection nozzle (N2) at an angle of 0 to 20 degrees with respect to the guide plate (G) surface and in a direction opposite to the rotation direction of the old paper roll (R1); High-speed air is also injected from the high-speed air injection nozzle (N1) toward the old paper roll (R1) from above the guide plate (G) in the direction opposite to the rotation direction of the old paper roll (R1). To prevent the tail portion of the remaining paper from scattering in a turret type unreel machine. 2. A turret type unreel machine for continuously feeding out a new paper roll (R2) while superposing and splicing a paper of a new paper roll (R1) onto a paper of an old paper roll (R1). A) a device for preventing the tail portion of the remaining paper from scattering, 1. guide plate (G); 2. a nozzle (N2) for injecting high-speed air at an angle of 0 to 20 degrees with respect to the guide plate (G) surface and in a direction opposite to the rotation direction of the old paper roll (R1); 3. A high-speed air injection nozzle (N1) for injecting high-speed air from above the guide plate (G) toward the old paper roll (R1) in a direction opposite to the rotation direction of the old paper roll (R1); Each of the guide plate (G) and the high-speed air injection nozzles (N1) and (N2) is close to the old paper roll (R1).
A turret-type unreel machine, which is detachably mounted, wherein the tail portion of the remaining paper is prevented from scattering. 3. A guide plate (G) and a high-speed air injection nozzle (N2) are attached to the same movable device via an attachment, and the attachment includes a preset old paper roll (R1). 3. A turret type unreel machine according to claim 2, further comprising a distance sensor so as to be able to stop at a distance from the turret type unreel machine. Shatter prevention device.