JPH1129249A - Web cutting device for web winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively cut even a web large in weighed amount, reduce the scatter of paper pieces and wind the web smoothly around a reel spool by providing pressure regulating mechanism for supplying pressure corresponding to the weighed amount of the web, between air jet pipes and an air supply source. SOLUTION: A controller C outputs a command signal, corresponding to the weighed amount of a web W in the course of being wound, to an electropneumatic converter 34. The secondary side of a pressure reducing valve 33 is set each time to air pressure corresponding to the weighed amount of the web W to be cut, and air with pressure suitable for the weighed amount is jetted from air jet pipes 21, 22. The web W can therefore be cut positively without applying excessively large force. In addition, scattered paper pieces can be reduced, and since the cut end shape of the web W is in good order, the web W can be smoothly wound around a reel spool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a web cutting device for a web winding device. A web such as paper is continuously formed through a wire part and a press part of a paper machine, and is wound into a roll by a web winding device on an output side. In addition, the winding roll manufactured in this way is set on a rewinding machine to form a small-diameter roll or a small-width slit. The present invention relates to a web cutting device for cutting a web after winding the web on a winding roll by the web winding device.

[0002]

2. Description of the Related Art Conventionally, a web winding device includes a reel drum for guiding a web, a reel spool, and a center drive device for rotating the web. The web is wound around a reel spool and wound up in a roll. Is configured. When the web is wound on the reel spool to a predetermined final winding diameter, the new reel spool moves from the standby position to the winding position, the web is cut, and the leading end of the web is wound on the new reel spool. The winding roll wound on the old reel spool moves to the payout position at the same time as the web is cut.

[0003] As described above, the web is cut when it reaches a predetermined final winding diameter. Conventionally, however, an air injection pipe for injecting high-pressure air onto a web running from a reel drum toward a winding roll is mounted on a lifting table. When high-pressure air is required to be cut off, high-pressure air is injected from the air injection pipe onto the web. And the air pressure of this air was constant.

[0004]

However, in spite of the fact that there are many types of webs to be papered and that the basis weight varies depending on the paper type of the web, the air pressure of the air injection pipe is reduced by the conventional web cutting device. Since it is constant, the air pressure of the air injection pipe is set to a high value corresponding to the web having the heaviest basis weight among the webs to be made.
For this reason, when air is jetted toward a light-weight web while maintaining the high air pressure, there is a problem that the web is shattered and scattered. In addition, there is a problem that the scattered paper pieces are collected by the operator, which is troublesome.

In view of the above circumstances, the present invention can reliably cut even a web having a large basis weight at the time of cutting the web, and can cut a web having a small basis weight so that the shape of the cutting edge is uniform and the scattering of paper pieces is reduced. It is another object of the present invention to provide a web cutting device capable of smoothly winding a new reel spool.

[0006]

According to a first aspect of the present invention, there is provided a web cutting device for a web winding device, wherein a web formed by a paper machine and running toward an output side is guided by a reel drum and wound on a reel spool. In the web take-up device to take, an air injection pipe is provided for injecting air for cutting the web continuous with the winding roll wound on the reel spool after passing through the reel drum. A pressure adjusting mechanism for supplying air having a pressure corresponding to the basis weight of the web is provided between the air supply source and the air supply source.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. First, an example of a web winding device to which the present invention is applied will be described. FIG. 5 is a schematic side view of the web winding device to which the present invention is applied, and FIG. 6 is a schematic plan view of the web winding device excluding the stocker 11 portion.

In FIGS. 5 and 6, reference numeral 1 denotes left and right frames.
The reel drum 3 is installed via a bearing 2 on the upper surface (on the side from which the paper is sent). The reel drum 3 guides the running of the web W by winding the web W around about one-fourth of the outer periphery thereof. Reference numeral 4 denotes a motor for rotating the reel drum 3.

Left and right rails 5 are mounted on the upper surface of the left and right frames 1 on the left side of the reel drum 3 in the drawing. The rail 5 is a table on which a reel spool 6 for winding the web W is placed. The reel spool 6 is supported by a secondary carriage 7 at a winding position A on the right side of the rail 5 in the drawing, and the web W is Take up.
Note that the diameter of the paper roll increases as the web W is wound, and the center position of the reel spool 6 is also changed to the reel drum 3.
, The winding position A has a certain length. The secondary carriage 7 is composed of operation side and drive side carriages 7a and 7b which run along the left and right frames 1, and each of the carriages 7a and 7b has a reel spool 6.
The carriage 7b on the driving side is provided with a center drive device 8 including a motor for rotating the reel spool 6 and a coupling. When the winding is completed, the take-up roll R (referred to as a paper roll having reached a predetermined final winding diameter) is transported to the payout position B by the secondary carriage 7.

Reference numeral 9 denotes a shock absorber that receives the winding roll R discharged from the secondary carriage 7 and absorbs a shock at the time of stopping.

On the other hand, a stocker 11 for storing several new reel spools 6 is provided above the reel drum 3, and the reel spools 6 are transferred one by one from the stocker 11 by a transfer arm 12. Is supplied to the primary carriage 13. The primary carriage 13 includes a clamp for supporting the supplied reel spool 6, moving means for moving the reel spool 6 from a standby position immediately above the reel drum 3 to a winding position at the right end on the rail 5, and A center drive device 14 including a motor and a coupling for applying a rotational driving force to the reel spool is provided.

Next, the winding process of the web winding device will be described. FIG. 7 is an explanatory diagram of the winding steps I to V. The state indicated by the symbol I is a state immediately before the paper roll r supported by the secondary carriage 7 is wound up, and the new reel spool 6 supported by the primary carriage 13 is waiting above the reel drum 3. The state II is a state in which the paper roll on the secondary carriage 7 has been wound up to the final diameter and has become the winding roll R. At this time, the secondary carriage 7 slightly moves to the payout side, and at the same time, the primary carriage 13 Moves the new reel spool 6 to the winding position.

The state III is a state in which the new reel spool 6 has been moved to the first winding start position placed on the rail 5 while being rotated by the center drive device 8 of the primary carriage 13, and in this state, , Web W
Is a winding roll R running on the secondary carriage 7 after traveling through the upper surface of the reel drum 3 and the lower surface of the new reel spool 6.
It is continuous. Therefore, here, the web cutter 1
5. The web W is cut by, for example, injecting air with an air injection pipe or the like. The end of the cut web W is wound around the take-up roll R, and the start end of the cut web W is wound around the new reel spool 6 to take up the web W newly.

Further, the second winding start position of the new reel spool 6 is substantially the same as the position indicated by the reference numeral II, and the new reel spool 6 is still supported by the primary carriage 13, and the center drive of the primary carriage 13 is performed. The reel spool 6 is rotationally driven by the device 8 in synchronization with the running speed of the web W. Winding of the web W around the new reel spool after cutting is performed in the same manner as described above.

The state IV is a state in which the secondary carriage 7 is transporting the take-up roll R in the direction of the payout position. During this time, the new reel spool 6 takes up the web W while being supported by the primary carriage 13. It is getting. The state indicated by the reference numeral V is a state in which the secondary carriage 7 has returned to the winding position after the paying out of the winding roll R has been completed.
3, the reel spool 6 is rotated by the center drive device 8 of the secondary carriage 7, and the web is wound up.
Then, the primary carriage 13 returns to the standby position again. By repeating the above operation, the web W continuously and rapidly formed by the paper machine is continuously wound up as roll paper.

Next, a web cutting device applied to the web winding device will be described. FIG. 2 is a side view of a web cutting device according to an embodiment of the present invention, and FIG.
FIG. 4 is an enlarged side view of the web cutting device, taken along the line I-III.

In FIG. 2, reference numeral 6a denotes a new reel spool at a first winding start position (an on-rail frame change position on the rail 5), and 6b denotes a second winding start position (optical mode above the rail). 3 shows a new reel spool at a frame change position). R is a take-up roll, which has been slightly moved by the secondary carriage 7 in the payout direction. The web W before the cutting is performed on the reel drum 3
Is connected to the lower surface of the take-up roll R via the lower surface of the reel spools 6a and 6b.
The web Wa traveling via the reel spool 6a at the take-up start position is different in height from the web Wb traveling via the reel spool 6b at the second take-up start position.

In FIGS. 2 and 3, reference numeral 15 denotes a web cutter which has a short air injection pipe 21 having a short length and a long air injection pipe 22 having a long length. The short air injection pipe 21 has an upper ejection port located immediately below the reel spool 6a at the first winding start position, and the long air ejection pipe 22 has an upper ejection port at the second winding start position. The respective heights are determined so that they are located immediately below the reel spool 6b, and they are mounted on the mounting housing 23.

As shown in FIGS. 3 and 4, the base of each of the air injection pipes 21 and 22 is attached to the main shaft of a rotary cylinder 24, and the air injection pipes 21 and 22 are driven by driving the rotary cylinder 24. The posture can be changed between an upright use position and a lying storage position.

The reel spool 6a is moved to the first winding start position.
Is supplied, only the short air injection pipe 21 is erected, and high-pressure air is injected into the web Wa from the tip thereof by an air pressure control device described later. The temporary break is spread over the entire width by the tension acting on the web Wa, and the web Wa breaks instantaneously.

When the reel spool 6b is supplied to the second winding start position, the long air injection pipe 22
Only, and pressurized air from the tip to the web Wb
, The web Wb breaks in the same manner as described above.

As described above, in the present embodiment, two types of frame switching, that is, the first winding start position (for changing the on-rail frame) and the second winding start position (for changing the Opti mode frame), are described below.
This can be dealt with simply by rotating each of the air injection pipes 21 and 22, and there is no need to adjust the height. Further, since no lifting means such as a lifting table is required, the structure is simplified.

Next, the air injection pipes 21, 2
2 will be described. FIG. 1 is an air supply circuit diagram in a web cutting device according to one embodiment of the present invention. As shown in the figure, each air injection pipe 21 and 22 and an air supply source A such as an air compressor.
Between the solenoid valve 31 and the air receiver tank 3
2 and the pressure reducing valve 33 are connected in order. An electropneumatic converter 34 for variably adjusting the secondary pressure of the pressure reducing valve 33.
Is interposed between the pressure reducing valve 33 and the air supply source A.

The electromagnetic opening / closing valve 31 is normally closed, and when the winding roll R reaches a predetermined final winding diameter, the web W
Is opened by a drive signal from the controller C in order to disconnect the valve. As a result of opening the valve, the air injection pipe 2
When high-pressure air is injected from 1, 22 the web W is cut as described above. The air receiver tank 32 suppresses the increase and decrease of the air pressure due to the opening / closing operation of the electromagnetic opening / closing valve 31,
It is provided to supply air while maintaining a predetermined pressure after the valve is opened. The pressure reducing valve 33 is connected to the air injection pipe 21,
This is a control valve for setting the secondary pressure on the 22 side to a predetermined pressure. The electropneumatic converter 34 is connected to a setting pilot pipeline 33b that opposes the secondary pilot pipeline 33a of the pressure reducing valve 33. The set pressure of the electropneumatic converter 34 is controlled by a command from the controller C. It can be changed by a signal. Therefore, by changing the set pressure of the electropneumatic converter 34 according to the command signal from the controller C, the secondary set pressure of the pressure reducing valve 33 can be arbitrarily changed.
The pressure reducing valve 33 and the electropneumatic converter 34 constitute a pressure adjusting mechanism described in the claims.

The controller C has a storage device such as a RAM or a ROM for storing data, and stores in advance an appropriate air pressure corresponding to the value of the basis weight of the web W in advance. . The input of the basis weight to the controller C may be performed manually, or may be sent as a signal from the control system of the entire paper machine.

Since the controller C outputs a command signal corresponding to the basis weight of the web W being wound to the electropneumatic converter 34, the secondary side of the pressure reducing valve 33 is adjusted to the basis weight of the web W to be cut. Air is set to a corresponding air pressure each time, and air having a pressure suitable for the basis weight is injected from the air injection pipes 21 and 22. Therefore, the web W can be cut without fail, and the web W can be cut without applying an excessively large force. Therefore, the number of scattered paper pieces can be reduced, and the shape of the cut end of the web W is adjusted, so that there is an effect that the winding on the new reel spool can be performed smoothly.

The web winding device to which the present invention is applied is not limited to those shown in FIGS. 5 to 7, and the mechanism of the cutting device is not limited to those shown in FIGS. In short, the invention can be applied to any type in which high-pressure air is injected from the air injection pipe.

[0028]

According to the first aspect of the present invention, since the web is reliably cut and the shapes of the cut edges are made uniform, the amount of paper fragments scattered at the time of web cutting can be reduced, and the reel is wound around a new reel spool. Can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is an air supply circuit diagram in a web cutting device according to an embodiment of the present invention.

FIG. 2 is a side view of the web cutting device according to one embodiment of the present invention.

FIG. 3 is a front view of the web cutting device shown in FIG. 2 taken along line III-III.

FIG. 4 is an enlarged side view of the web cutting device according to one embodiment of the present invention.

FIG. 5 is a schematic side view of a web winding device to which the present invention is applied.

FIG. 6 is a schematic plan view of the web winding device excluding the stocker 11;

FIG. 7 is an explanatory diagram of a winding step in a web winding device to which the present invention is applied.

[Explanation of symbols]

 Reference Signs List 3 reel drum 6 reel spool 15 web cutter 21 short air injection pipe 22 long air injection pipe 31 solenoid on-off valve 32 air receiver tank 33 pressure reducing valve 34 electropneumatic converter

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Hamasago 8230 Otajima, Oshima, Tamashiki, Kurashiki-shi, Okayama Prefecture Sumitomo Heavy Industries Machinery Co., Ltd. Inventor Seppo Luomi Finland 04440 Jarvenpa, Purkuya 2 A (72) Inventor Kaya Fabritius Finland 05820 Hibinka, Reponiemi

Claims (1)

[Claims] 1. A web take-up device for guiding a web made by a paper machine and traveling toward an output side and winding the web on a reel spool, winding the web on the reel spool through the reel drum. An air injection pipe for injecting air for cutting a continuous web on the wound-up roll is provided, and between the air injection pipe and an air supply source, a pressure having a pressure according to the basis weight of the web is provided. A web cutting device for a web winding device, comprising a pressure adjusting mechanism for supplying air.