JP2010168688A - Paper threading device for paper machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper threading device installable even in the case that only a small space is available as a part for necessitating paper threading work, and effective for reducing the number of workers necessary for the paper threading work. <P>SOLUTION: A flip plate 15 swinging by rotation of a shaft 13 is placed under a doctor blade 2 of a drier cylinder D furnished with the doctor blade 2, a swinging base plate 16 is attached to the back face of the flip plate 15, and a paper cutting knife 16a is attached to the tip end of the base plate. A tail travel guiding plate 18 is brought into connection with the flip plate 15 by a hinge 17, and the tip end of the tail travel guiding plate 18 is floated by a leg 18a to hide the edge of the paper cutting knife 16a. When the flip plate 15 is swung, the swinging base plate 16 is also swung together with the flip plate, and the tail travel guiding plate 18 is superposed with the swinging base plate 16 to expose the edge. Accordingly, the tail part traveling to a pit is cut and guided to a carrier rope 3 and the tail part is transferred to the carrier rope 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paper machine for feeding a paper ear (tail) between each part when a paper machine is started and when a paper is cut from a wire part to a reel part of the paper machine. The present invention relates to a paper passing device.

  A long net type or twin wire type paper machine in a papermaking process mainly includes a wire part, a press part, a dry part, a calendar part, and a reel part. The papermaking raw material in which pulp is dispersed in water is supplied from a stock inlet to a reticulated wire that moves endlessly, and a paper layer is formed while dewatering while the wire is running. The paper is dried by the dry part, the paper thickness is adjusted and smoothness is given by the calendar part, and the reel part is wound around the reel to complete the paper.

  If the paper is cut inadvertently during operation, or if the paper machine is restarted after paper machine maintenance, etc., the direction perpendicular to the paper running direction in the paper machine, that is, the width of the paper machine Paper cannot be made from the beginning of operation over the entire direction. At the start of operation, a paper passing operation for passing a narrow tail for each part is performed.

  For example, between the wire part and the press part, between the press part and the dry part, between the pre-dryer and the size press, between the dry part and the calendar part, etc., the paper is not guided by the wire, felt, canvas, etc. It becomes an open draw part where only paper runs. In this part, the tail is detached from the roll at the end of each part by a doctor device or the like and fed to the next process by the carrier device. At this time, at the beginning of paper threading, the tail detached from the roll is collected into the pit, and is fed to the next process in a state where the tail size and travel are stable. For this reason, when feeding the tail to the carrier device, there is a need for a paper passing device that cuts the tail and sends the cut end to the next process.

  As this type of paper passing device, for example, in Patent Document 1, in a paper passing device that passes a narrow tail from a dryer part of a paper machine to a size press part or a calendar reel part, an action of a high-speed air flow and a Coanda effect are used. Width adjustment of the paper passing tail, which consists of an air nozzle or a chute plate that supports the suction and non-contact support of the tail, tilts the whole to an angle that allows the width to be adjusted by a preset width adjustment dimension, and moves the tail parallel to the traveling direction There is disclosed a configuration in which the apparatus is provided and the length of the tail conveyance object sandwiching the tail is increased.

  Patent Document 2 discloses a paper machine in which a doctor and an air nozzle are arranged in the vicinity of a dryer roll, and paper that passes through the dryer roll is blown off from the dryer roll by the doctor and air is blown by the air nozzle to the next process. In the paper passing device, there is disclosed a configuration in which an air nozzle is provided integrally with a doctor, and a moving means for moving the doctor and the air nozzle along the outer periphery of the dryer roll is disclosed.

JP-A-6-322690 JP-A-11-350375

  In the paper passing device described in the above-mentioned Patent Document 1, the fixed blade of the knife that cuts the tail discharged to the pit is fixed at a certain position. Therefore, depending on the behavior of the tail, the tail may come off from the blade of the knife. There is a risk that it will be impossible to cut reliably. If the tail is not cut, the tail must be cut again.

  Further, in the paper passing device described in Patent Document 2, since the tail is transferred to the guide conveyor provided with the suction device, a space for installing the guide conveyor between the dryer roll and the calendar roll. Need. For this reason, the installation space of a paper passing apparatus will become large. In addition, since it is necessary to retract the guide conveyor from the paper travel area after the completion of paper passing, a moving mechanism for moving the guide conveyor from the paper position to the retracted position is required, and a large paper passing device is required. There is a risk of becoming.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a paper passing device for a paper machine that can reduce the installation space, reliably cut the tail, and easily perform the paper passing operation.

  As a technical means for achieving the above object, the paper machine of the paper machine according to the present invention removes the paper from a guide roll that guides the paper to travel on the paper machine while winding the paper to be produced. An end portion of the paper in the width direction when the paper is threaded in a portion of the paper machine that feeds the paper released by the doctor device to the next process in an open draw state. In a paper passing device of a paper machine for transferring a tail formed by cutting the tail to a carrier device for feeding to the next process, the tail separated from the guide roll by the doctor device is guided to a pit for recovery. A tail travel guide plate that is swingable about a swing shaft is provided between a paper collection position that is a direction to be transported and a paper threading position that is a direction to be transferred to the carrier device, and a tip of the tail travel guide plate is provided. A paper cutting knife is provided so as to face the portion, and the paper cutting knife is positioned at a retracted position retracted from a tail guide surface of the tail traveling guide plate in a state where the tail traveling guide plate is at the paper collecting position. It is characterized in that it is positioned at a paper cutting position that protrudes from the tail guide surface and cuts the tail while swinging from the collecting position to the paper threading position.

  In the state where the tail travel guide plate is positioned at the paper collection position, the tail is guided and collected by the pit. When the traveling state of the tail is stabilized, the tail traveling guide plate is swung from the paper collecting position to the paper passing position. Due to this swinging, the tail is pushed up by the tail travel guide plate and is in tension. Further, due to the swinging of the tail travel guide plate, the paper cutting knife that has been in the retracted position until then protrudes from the tail guide surface of the tail travel guide plate, thereby cutting the tensioned tail. The cut end portion of the cut tail is changed in the traveling direction along with the tail traveling guide plate, and is fed to the carrier device composed of a carrier rope or the like.

  According to a second aspect of the present invention, there is provided the paper passing device of the paper machine, wherein an air jet nozzle is provided on a shaft body that rotates about the swing shaft of the tail travel guide plate, and the air jetted from the air jet nozzle The direction is aligned with the tail guide surface of the tail travel guide plate.

  In order to reliably travel the tail along the tail guide surface of the tail travel guide plate, air is jetted in a direction along the travel direction. Since the air injection nozzle is provided on a shaft body that rotates about the swing shaft, the spray direction of the shower nozzle is changed along with the swing of the tail travel guide plate, so that the tail travel direction is always maintained. Air is injected toward

  According to a third aspect of the present invention, there is provided a paper feeding device for a paper machine, wherein a flip plate is attached to the shaft body, overlapped with a rear surface of the flip plate, and a swing substrate provided with the paper cutting knife at a tip portion. Attach and connect the tail travel guide plate to the tip of the flip plate via a hinge, and with the tail travel guide plate in the paper collection position, the tip of the tail travel guide plate is connected to the paper cutting knife. Bending the blade edge with the hinge in a retracted state, positioning the paper cutting knife at the retracted position, and swinging the flip plate by the rotation of the shaft body causes the tail travel guide plate to move to the paper threading position. The tail travel guide plate is swung with respect to the flip plate by the hinge, and the cutting edge of the paper cutting knife protrudes from the tip of the tail travel guide plate. It is characterized in that is positioned.

  In the state where the tail travel guide plate is in the paper collection position, the paper cutting knife is in the retracted position and its blade edge is hidden. In this state, by rotating the shaft body in the direction in which the tail travel guide plate is positioned at the sheet passing position, the flip plate attached to the shaft body swings in the same direction. Since the swing substrate is superposed on the flip plate, the swing substrate also swings in the same direction. When the flip plate swings, the tail travel guide plate connected to the flip plate via the hinge swings at the hinge portion and is superimposed on the swing substrate. By swinging the tail travel guide plate with respect to the flip plate, the cutting edge of the paper cutting knife provided at the tip of the swing substrate protrudes from the tail guide surface of the tail travel guide plate and is exposed along the tail travel guide plate. The traveling tail will be cut.

  According to a fourth aspect of the present invention, there is provided a paper passing device for a paper machine, comprising: a Coanda device that injects guide air toward the pit toward the position where the tip of the tail travel guide plate at the paper recovery position faces And the tail is fed to the pit by the airflow of the guide air.

  The tail travel is stabilized so that the tail is surely guided to the pit. That is, using the Coanda effect in which air flows along the surface of an object after the tail traveling toward the pit along the tail traveling guide plate is separated from the tail traveling guide plate, A guide is provided to the pit, and a Coanda device is provided for this purpose.

  According to a fifth aspect of the present invention, there is provided a paper passing device for a paper machine, wherein an air ejecting device is provided at a position where the doctor device faces, and a tail detached from the guide roll by the doctor device is blown out from the air ejecting device. It is characterized in that it is blown off to the carrier device with blown air.

  That is, the tail is fed to the carrier device by ejecting air from the air ejecting device and blowing the tail to the carrier device in a state where the tail travel guide plate is located at the sheet passing position.

  According to a sixth aspect of the present invention, there is provided the paper passing device for the paper machine, wherein the guide roll is a dryer cylinder.

  Since a paper passing operation is required in the part that becomes an open draw in a paper machine, the paper passing device according to the present invention can be used in the part, but in particular, it is used in a part where the tail is detached from the dryer cylinder. It is. Examples of the part from which the tail is detached from the dryer cylinder include a part that moves from the pre-dryer to the size press, and a part that moves from the dry part to the calendar part or the reel part.

  According to the paper passing device of the paper machine according to the present invention, the paper cutting knife exposes the blade edge by the swing of the tail travel guide plate and cuts the tail. Also, since the tail is guided by the swing of the tail travel guide plate and fed to the carrier device, the tail is in a tensioned state, and the paper cutting knife can surely cut the tail so that the tail is securely Can be fed to the carrier device. In addition, since the tail travel guide plate for guiding the tail is swingable, the installation space for the paper passing device is not increased.

  According to the paper passing device of the paper machine according to the second aspect of the present invention, air injected from the air injection nozzle is always blown onto the tail, and the direction of the air flow is the tail of the tail travel guide plate. Since it is along the guide surface, the tail surely travels along the tail guide surface regardless of the position of the tail travel guide plate. For this reason, the tail is surely collected in the pit when the tail travel guide plate is at the paper collecting position, and is reliably fed to the carrier device when it is at the paper passing position.

  According to the paper passing device of the paper machine according to the invention of claim 3, the tail travel guide plate is swung by the swing of the flip plate, and the paper cutting knife provided at the tip of the swing substrate Can be positioned at the retracted position and the paper cutting position, so that the tail can be cut reliably with a simple structure. Moreover, since it is sufficient that there is a space for the swing range of the swing substrate, it is possible to obtain a paper passing device that does not increase the installation space.

  According to the paper passing device of the paper machine according to the fourth aspect of the invention, the tail can be reliably guided to the pit, can be reliably collected, and the tail traveling to the pit can be stabilized quickly. Can be made.

  In addition, according to the paper passing device of the paper machine according to the fifth aspect of the invention, the tail can be reliably and smoothly fed to the carrier device. Therefore, the number of workers required for the paper passing operation can be reduced as much as possible.

  In addition, according to the paper passing device of the paper machine according to the invention of claim 6, the paper passing work in the dry part can be performed smoothly and reliably.

It is a perspective view which shows schematic structure of the paper passing apparatus of the paper machine which concerns on this invention, and has shown the case where it installs in the dryer cylinder. FIG. 2 is a schematic front view of the paper passing device shown in FIG. 1, showing a state where a tail travel guide plate is removed. FIG. 3 is a left side view of the paper passing device shown in FIG. 2. It is a side view explaining the effect | action by the paper passing apparatus based on this invention, and has shown the state in case the tail is fed to the pit. It is a side view explaining the effect | action by the paper passing apparatus which concerns on this invention, and has shown the state in case a tail is cut | disconnected. It is a side view explaining the effect | action by the paper passing apparatus based on this invention, and has shown the state in case a tail transfers to a carrier apparatus.

  Hereinafter, based on the illustrated preferred embodiment, a paper passing device of a paper machine according to the present invention will be described in detail. In this embodiment, for example, a case where the tail is detached from the dryer cylinder and the paper is passed, as in the case of paper passing from the pre-dryer to the next size press, will be described.

  FIG. 1 is a perspective view showing a schematic structure of the paper passing device 1. The paper passing device 1 is provided near the dryer cylinder D as a guide roll in the final stage of the pre-dryer and facing the dryer cylinder D. The doctor blade 2, which is a doctor device, is provided at a position facing the doctor device. The doctor blade 2 peels and separates the paper P guided by being wound around the dryer cylinder D from the dryer cylinder D. Further, as shown in FIGS. 4 to 6, the sheet passing device 1 is an end portion of the attachment beam B spanned along the axial direction of the dryer cylinder D, and the end portion of the paper P is cut. It is attached to the position where the tail T formed in this way faces. The attachment beam B may be an existing doctor back for carrying the tail peeled off by the doctor blade 2. A dryer canvas (not shown) is wound around the dryer cylinder D. In the dryer cylinder D, the paper P is guided while being pressed against the dryer cylinder D while being covered with the dryer canvas. After the dryer canvas is detached from the dryer cylinder D, the dryer canvas is wound around the canvas roll R and guided to the dryer cylinder at the foremost stage of the pre-dryer. The paper P detached from the dryer cylinder D is fed to a size press (not shown) which is the next process. Below the canvas roll R, a carrier rope 3 is arranged as a carrier device that guides the tail T detached from the dryer cylinder D to the size press during the sheet passing operation. This carrier rope is wound around a rope sheave 3a so as to endlessly circulate. The tail T is guided by the carrier rope 3 and guided to the size press. Also, a pit (not shown) is provided below the doctor blade 2, and when the paper P detached from the dryer cylinder D is not fed to the size press, it is dropped into the pit and collected.

  As shown in FIGS. 1 to 3, a bracket plate 11a attached to the attachment beam B is stretched over a pair of pedestal rails 11 projecting laterally, and the pedestal plate 12 is fixed. As shown in FIG. 3, the upper end of the gantry plate 12 is bent substantially in a V shape to form a tail guide portion 12 a, and the tail T introduced into the paper passing device 1 is located above the gantry plate 12. Guided to pass through. Each of the side end portions of the gantry plate 12 is provided with a wall body portion 12c that is erected with the front side directed.

  Each of the upper side end portions of the gantry plate 12 is provided with a bearing portion 12b, and the hollow shaft body 13 is rotatably supported by the bearing portion 12b. An end portion of a piston rod 14a reciprocally moved by a drive cylinder 14 is connected to one outer side of the bearing portion 12b of the shaft body 13 through a clevis 14c so as to be swingable. The tail portion of the drive cylinder 14 is rotatably supported by a support shaft 14b provided on the wall portion 12c, so that the drive cylinder 14 can swing around the support shaft 14b.

  A flip plate 15 is attached to the shaft body 13 integrally with the shaft body 13, and an oscillating substrate 16 is provided on the back surface of the flip plate 15 in a long hole 15 a formed in the flip plate 15. The inserted fixing screw 15b is attached by being fastened to a female screw portion (not shown) formed on the swing substrate 16. The lower end portion of the oscillating substrate 16 is bent toward the front, and a paper cutting knife 16a is formed by the bent portion, and the cutting edge thereof is directed forward. As shown in FIG. 1, a tail travel guide plate 18 is connected to the tip of the flip plate 15 via a hinge 17. The tip of the tail travel guide plate 18 is extended to a position where it does not overlap the paper cutting knife 16a. Further, leg portions 18a are formed at appropriate positions on both sides of the tail travel guide plate 18 so as to face the back side of the tail travel guide plate 18 so that their tips abut against the gantry plate 12. It is. With the tip of the leg 18a in contact with the gantry plate 12, the hinge 17 is bent with respect to the flip plate 15, and the tip of the tail travel guide plate 18 is the cutting edge of the paper cutting knife 16a. The blade edge is not exposed from the tail travel guide plate 18 so as to be positioned further forward. The position of the paper cutting knife 16a when the blade edge is not exposed from the tail travel guide plate 18 is defined as the retracted position.

  A Coanda device 20 is attached to the lower end of the gantry rail 11. An air outlet 20a is arranged on the front surface of the Coanda device 20, and air is blown downward from the air outlet 20a. A guide surface for air blown from the air outlet 20a is formed on the front surface of the casing of the Coanda device 20.

  In addition, an appropriate number of air injection nozzles (not shown) are arranged in parallel along the axial direction on the shaft body 13, and along the tail guide surface 18b that is the surface of the tail travel guide plate 18 from the air injection nozzles. Guide air is blown out.

  Further, below the doctor blade and above the tail guide portion 12, a tail blower device 21 as an air spray device in which an appropriate number of tail blow nozzles 21a are arranged in parallel is provided, The tail blown air is jetted from the tail blow nozzle 21a toward the carrier rope 3.

  The operation of the paper passing device according to the present invention configured as described above will be described below.

  1, 2, and 3, and FIG. 4 show a state where the tail T is in the paper collecting position for collecting the tail T into the pit, and the piston rod 14 a of the drive cylinder 14 is moved backward to move the swing. The tail travel guide plate 18 connected to the front end portion of the flip plate 15 is directed to the lower end of the substrate 16 and the flip plate 15, and the front end of the leg portion 18a is in contact with the gantry plate 12 so that the hinge 17 Folded with respect to the flip plate 15 at a portion, the paper-cutting knife 16a is positioned at the retracted position, positioned in front of the paper-cutting knife 16a provided at the tip of the swing substrate 16. . Further, guide air is injected from an air injection nozzle (not shown) arranged in parallel with the shaft body 13, while the tail blower device 21 stops operating, and tail blow air is injected from the tail blower nozzle 21a. It has not been.

  An end in the width direction of the paper is cut upstream of the dryer cylinder D to form a tail T. When the tail T and the paper P other than the tail T are scraped away from the dryer cylinder D by the doctor blade 2, the tail T and the paper P other than the tail T fall into the pits. . At this time, the tail T travels while being guided from the front surface of the flip plate 15 along the tail guide surface 18b of the tail travel guide plate 18 by the guide air ejected from the air ejection nozzle formed in the shaft body 13. Further, since the paper cutting knife 16a is in the retracted position, the tail T is not cut. Further, the tail T receives the Coanda action by the air blown from the air outlet 20a of the Coanda device 20, travels along the front surface of the Coanda device 20, and is guided to the pit. Moreover, the tail T travels to the pit in a tensioned state by the air flow of the guide air injected from the air injection nozzle of the shaft body 13 and the air blown out from the Coanda device 20.

  When the traveling state of the tail T is stabilized, the drive cylinder 14 is operated to advance the piston rod 14a. As a result, the shaft 13 connected to the tip of the piston rod 14a rotates about the central axis, and the flip plate 15 integral with the shaft 13 is shown in FIG. From the position, the center axis of the shaft body 13 is swung in the counterclockwise direction in FIG. As a result, the oscillating substrate 16 attached to the flip plate 15 is also oscillated in the same direction. From the state in which the tail travel guide plate 18 connected to the flip plate 15 via the hinge 17 is bent with respect to the flip plate 15 by the hinge 17, the tail guide is provided in the extended surface of the flip plate 15. It will be in the state where surface 18b is located. In this state, the tail travel guide plate 18 is superimposed on the swinging substrate 16, and the paper cutting knife 16a that has been in the retracted position protrudes from the tail guide surface 18b of the tail travel guide plate 18 and is exposed. Will be located.

  As the flip plate 15 swings, the tail T traveling toward the pit is lifted. On the other hand, the tail T travels in a tensioned state, and the tension is further increased by being lifted by the flip plate 15. For this reason, the paper cutting knife provided at the tip of the swinging substrate 16 is increased. It will be cut by 16a.

  The flip plate 15 further swings, and the tip of the swing substrate 16 points toward the carrier rope 3 as shown in FIG. In this state, when the tail blower 21 is operated and tail blow air is injected from the tail blow nozzle 21a, the cut tail T is blown toward the carrier rope 3. At this time, since the tail T is cut, the tail T is not in a tensioned state, and the cut end is blown toward the carrier rope 3 and is held by the carrier rope 3. Thereafter, when the tail blower 21 is stopped and the injection of the tail blown air is stopped, the tail T travels with the carrier rope 3 and is fed to the next process.

  Even when the tail T shifts to the carrier rope 3, the paper P other than the tail T is continuously discharged to the pit. In this state, the paper can be passed by gradually increasing the width of the tail T.

  In this embodiment, the paper passing device 1 used for passing the paper in the portion where the pre-dryer is transferred to the size press has been described. It can also be used for a part to be transferred, a part to be transferred from a size press to an after dryer, a part to be transferred from a dry part to a calendar part or a reel part, and the like.

  According to the paper passing device of the paper machine according to the present invention, the installation space of the paper passing device does not increase, and therefore a large space is not required between the guide roller from which the tail is detached and the carrier device. For this reason, it can be easily installed in an existing paper machine, and moreover, it is possible to reduce the manpower required for paper passing work, which contributes to the quick start of the paper machine.

D Dryer cylinder T Tail P Paper 1 Paper passing device 2 Doctor blade 3 Carrier rope (carrier device)
11 Mounting rail
12 Mounting plate
13 shaft
15 flip board
16 Swing board
16a paper cutting knife
17 Hinge
18 Tail travel guide plate
18a leg
18b Tail guide surface
20 Coanda equipment
20a Air outlet
21 Tail blower (air injection device)
21a Tail blow nozzle

Claims (6)

A doctor device for detaching the paper from a guide roll for guiding the paper on the paper machine while winding the paper to be made is provided, and the paper released by the doctor device is in an open draw state in the next process. A paper machine that is located at a portion of the paper machine that feeds the paper, and that feeds the tail formed by cutting the end in the width direction of the paper to a carrier device when feeding the paper to the next process In the paper passing device of
A swing shaft is provided between a paper collection position, which is a direction for guiding the tail separated from the guide roll by the doctor device to a pit for collection, and a paper threading position, which is a direction for transferring the tail to the carrier device. A tail travel guide plate that swings as a center is provided.
A paper cutting knife is provided facing the tip of the tail travel guide plate,
The paper cutting knife is positioned at a retracted position where the tail travel guide plate is retracted from the tail guide surface of the tail travel guide plate in a state where the tail travel guide plate is at the paper recovery position, and is swinging from the paper recovery position to the paper threading position. The paper passing device of the paper machine is located at a paper cutting position that protrudes from the tail guide surface and cuts the tail.   An air injection nozzle is provided on a shaft body that rotates about the swing axis of the tail travel guide plate, and the direction of air to be injected from the air injection nozzle is aligned with the tail guide surface of the tail travel guide plate. The paper passing device of the paper machine according to claim 1. A flip plate is attached to the shaft body,
Attach a rocking substrate with the paper cutting knife provided at the tip so that it overlaps the back surface of the flip plate,
The tail travel guide plate is connected to the tip of the flip plate via a hinge,
With the tail travel guide plate in the paper collection position, the tip of the tail travel guide plate is bent by the hinge so that the cutting edge of the paper cutting knife is retracted, and the paper cutting knife is retracted. The tail travel guide plate is swung with respect to the flip plate by the hinge while the tail travel guide plate is swung to the paper threading position by swinging the flip plate by rotating the shaft body. The paper passing device for a paper machine according to claim 1 or 2, wherein the paper cutting knife is moved so that the cutting edge of the paper cutting knife protrudes from the tip of the tail travel guide plate and is positioned at a paper cutting position. .   A Coanda device for injecting guide air in the direction of the pit is disposed at the position where the tip of the tail travel guide plate at the paper collection position faces, and the tail is fed to the pit by the air flow of the guide air. The paper passing device for a paper machine according to any one of claims 1 to 3, wherein:   An air injection device is provided at a position where the doctor device faces, and a tail detached from the guide roll by the doctor device is blown off to the carrier device with blown air blown from the air injection device. A paper machine for a paper machine according to any one of claims 1 to 4.   The paper passing device for a paper machine according to any one of claims 1 to 5, wherein the guide roll is a dryer cylinder.

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