JP7050274B2 - Paper machine - Google Patents

Description

The present invention relates to a paper making machine and relates to a technique for discharging cutting debris such as ear paper.

As a conventional paper making machine, for example, there is one provided with a cutting device described in Patent Document 1. This cutting device serves as a finishing unit for cutting a strip of paper made from a waste paper pulp liquid obtained by separating used paper into recycled paper of a predetermined size. The cutting device transports the strip of paper along the longitudinal direction of the paper strip by the transport portion, and cuts the strip of paper in a direction intersecting the transport direction with a cutter extending in the width direction of the strip of paper. Then, when the control device detects that the front end portion of the strip paper has been conveyed to the upstream side of the cutter or the cutter by a predetermined length by the detection means, the control device cuts the strip paper by the cutter and starts from the front end portion of the strip paper. Within the specified range, the paper is repeatedly cut into smaller pieces than the size of the recycled paper.

Then, the strip-shaped paper is cut into pieces of a predetermined size in the longitudinal direction by a cutter, and then the side edges of the cut paper pieces are cut along the transport direction by a slitter. The scraps generated by cutting by the slitter, so-called ear paper, are guided below the transport surface of the cut paper piece by a guide.

JP 2011-121125

In the conventional paper making machine, the cutting debris of the ear paper generated in the finishing portion is stored in the storage box. However, since the cutting waste is always discharged from the finishing part in the same direction, the cutting waste piled up inside the storage box is unevenly distributed in the storage box, and the entire capacity of the storage box can be utilized. However, there may be a situation where some of the cutting waste overflows from the storage box before the storage box is filled with cutting waste.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a paper making machine capable of stacking cutting scraps discharged from a finishing part of the paper making machine in an even state in the accommodating part.

In order to solve the above problems, the paper making machine according to the present invention has a finishing surface that finishes the molded paper formed in the previous step by cutting, and a transporting device that blows the cutting scraps generated in the finishing surface as objects to be transported. A storage unit for accommodating an object to be air-fed, and a control device for controlling the operation of the finish and the transport device are provided. The control device has a blow control device, the blow control device controls the operation of each transport air supply section of the transport device, and changes and adjusts the delivery position of the transport object in the accommodating section. Has a transport guide section in which the object to be transported is blown on the transport surface of the guide plate extending from the transport air supply section to the accommodating section, and the guide of the transport guide section is provided by the transport air supplied by each transport air supply section. An air flow is formed on the transport surface of the plate, and the blow control device of the control device controls the operation of each transport air supply unit of the transport device to form a distribution pattern of the air flow on the transport surface of the guide plate. It is characterized in that the distribution pattern is changed over time to change and adjust the delivery position of the transported object .

In the papermaking machine according to the present invention, the blow control unit of the control device is characterized in that the distribution pattern of the air flow is changed at a predetermined timing.

In the paper making machine according to the present invention, the transport device is characterized by having a plurality of convex portions and a ventilation path between the convex portions on the transport surface of the guide plate.

As described above, according to the present invention, when the object to be conveyed of the cut waste generated at the finish is blown to the accommodating portion, the operation of each transport air supply unit of the transfer device is controlled to control the object to be conveyed in the accommodating portion. By changing and adjusting the delivery position of, the position where the cutting debris of the object to be transported is piled up changes in the accommodating portion, and the bias of the cutting debris is leveled in the accommodating portion. As a result, the cutting waste can be fully stored in the storage unit, and the entire capacity in the storage unit can be utilized.

The transport device forms an air flow of the transport wind, puts it on the air flow, and transports the cutting debris to the accommodating portion. By changing the distribution pattern of the air flow over time, the delivery position of the object to be transported is changed and adjusted.

It is also possible to form an air flow on the transport surface of the guide plate.

The change in the distribution pattern of the air flow may be continuously performed over time, or may be changed at a predetermined timing.

Further, by having a plurality of convex portions and ventilation passages between the convex portions on the transport surface of the guide plate, the cutting debris on the transport surface is supported by the convex portions, and a part of the transport wind is ventilated. It flows through the path between the cutting debris and the transport surface of the guide plate. Therefore, the resistance acting between the transport surface of the guide plate and the cutting debris is reduced, and the energy consumption for blowing the cutting debris can be suppressed.

A model part of a finishing part of a papermaking apparatus according to an embodiment of the present invention. Schematic diagram showing the distribution pattern of one airflow of the transport device in the same embodiment. Schematic diagram showing the distribution pattern of other airflows of the transport device in the same embodiment. Sectional drawing which shows the main part of the guide plate in the same embodiment Block diagram showing a papermaking apparatus in the same embodiment A chart showing the operation patterns of the three transport air supply units in the same embodiment. A chart showing the operation patterns of the three transport air supply units in another embodiment of the present invention. Chart showing the operation pattern of two transport air supply units in another embodiment of the present invention. Chart showing the operation pattern of two transport air supply units in another embodiment of the present invention. Chart showing operation patterns of four transport air supply units in another embodiment of the present invention. Chart showing operation patterns of four transport air supply units in another embodiment of the present invention. Chart showing operation patterns of four transport air supply units in another embodiment of the present invention. Chart showing operation patterns of five transport air supply units in another embodiment of the present invention. Chart showing operation patterns of five transport air supply units in another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 5 is a block diagram showing a schematic configuration of a papermaking apparatus. The paper making machine 1 of the present embodiment is configured as a used paper recycling device which is a small paper making device that can be installed in an office or the like, for example. The papermaking machine 1 includes a pulp liquid manufacturing unit 2, a deinking unit 3, a papermaking unit 4, a drying unit 5, and a finishing unit 6 inside the papermaking machine main body 10, and has a control device 13 for controlling each unit. ..

The pulp liquid manufacturing unit 2 is a step of separating a pulp raw material to manufacture a pulp suspension containing pulp. In the present embodiment, a pulp suspension is produced using used paper 11 as a pulp raw material.

The deinking unit 3 is a step of deinking the pulp suspension produced in the pulp liquid manufacturing unit 2. The papermaking section 4 is a step of making a wet paper by making a papermaking of a deinked pulp suspension supplied from the deinking section 3. The drying unit 5 forms a step of drying the wet paper formed by the papermaking unit 4. The finishing unit 6 is a step of obtaining the paper 12 by performing a finishing process such as cutting on the molded paper of the dry paper dried by the drying unit 5.

As shown in FIGS. 1 to 4, in the finishing portion 6, a plurality of transport roller pairs 22 are arranged along the transport path of the molded paper 21, and a cutter device is provided between the transport roller pair 22 and the transport roller pair 22. 23, the reject device 24, the calendar device 25, and the slitter device 26 are sequentially arranged from the upstream side to the downstream side in the transport direction of the molded paper 21.

In the cutter device 23, the paper-shaped molded paper 21 sent from the drying unit 5 in the previous step is cut into a predetermined fixed size in the transport direction to form a single-wam molded paper 21. The reject device 23 discharges the defective molded paper 21 to the outside of the system. A collection unit 27 for collecting discharged paper is arranged below the cutter device 23 and the reject device 24.

In the calendar device 25, the sheet-fed molded paper 21 is subjected to calendar processing, and the molded paper 21 is passed between a pair of upper and lower smooth rolls 25a and 25a to improve the smoothness and the thickness such as averaging the thickness. Make adjustments.

The slitter device 26 trims both side edges of the sheet-fed molded paper 21 along the transport direction, and adjusts the width of the molded paper 21 to a fixed size in a direction orthogonal to the transport direction.

Below the slitter device 26, a transport device 29 that blows the cutting scraps such as ear paper generated by cutting as the transport target 28 is arranged. A guide portion 30 for guiding the cutting waste to the transport device 29 is arranged between the slitter device 26 and the transport device 29.

The guide portion 30 has an upstream guide plate 31 and a downstream guide plate 32 in front of and behind the transport direction via the slitter device 26, and the space between the upstream guide plate 31 and the downstream guide plate 32 forms a cutting flow path 30a. ..

Outside the paper machine 1, a storage unit 33 for accommodating the cutting debris blown by the transport device 29 is arranged at a position corresponding to the discharge port 10a provided on the side of the paper machine main body 10. The transport device 29 has a plurality of transport air supply units 34, 35, 36 that can be individually operated independently.

In the present embodiment, the individual transport air supply units 34, 35, 36 have fan devices 40, 41, 42 arranged for each of the air supply ports 37, 38, 39. The fan devices 40, 41, and 42 can control operation and stop, respectively, and control the air volume independently of the other fan devices 40, 41, 42. Instead of arranging fan devices 40, 41, 42 for each air supply port 37, 38, 39, one fan device is connected to each air supply port 37, 38, 39 via a duct and a damper. It is also possible to do. Further, the present invention can be achieved by installing two or more transport air supply units 34, 35, 36, not limited to three.

In the upstream guide plate 31 of the guide portion 30, the lower end portion 31a covers the front of the upper portion of the air supply ports 37, 38, 39, and the lower end portion 31a has the transport air blown upward from the air supply ports 37, 38, 39. It suppresses diffusion. Further, the bottom plate portion 32a of the downstream guide plate 32 extends in the air supply direction, and the bottom plate portion 32a suppresses the diffusion of the conveyed air blown from the discharge port 10 upward.

In the transport device 29, the transport guide section 43 is arranged between the plurality of transport air supply sections 34, 35, 36 and the discharge port 10a. The transport guide portion 43 has a bottom guide plate 44 extending from the transport air supply portions 34, 35, 36 toward the accommodating portion 33 through the discharge port 10a, and side guide plates 45 provided on both sides of the bottom guide plate 44. .. The bottom guide plate 44 forms a transport surface 46 that blows the transport target object 28, and the side guide plate 45 prevents the transport wind and the transport target object 28 from deviating from the transport surface 46. The bottom guide plate 44 has a plurality of convex portions 47 formed on the transport surface 46 to which the object to be transported is blown by embossing or the like, and the convex portions 47 form a ventilation path 48 between the convex portions 47.

Hereinafter, the operation of the above configuration will be described. The molded paper 21 sent from the drying section 5 to the finishing section 6 in the previous process is sequentially conveyed by a plurality of transport roller pairs 22 on the transport path. Then, the cutter device 23 cuts the molded paper 21 of the paper into a predetermined fixed size in the transport direction to form a single-wam molded paper 21. The defective molded paper 21 is discharged to the collection unit 27 by the reject device 24. The sheet-fed molded paper 21 that has been calendar-processed by the calendar device 25 is cut at both side edges along the transport direction in the slitter device 26, and the width of the molded paper 21 is adjusted to a fixed size.

The cutting debris such as ear paper cut by the slitter device 26 passes through the drop path 30a of the guide portion 30 as a transport object 28, is guided by the upstream guide plate 31 and the downstream guide plate 32, and is guided by the transport guide portion 43 of the transport device 29. Fall into.

As shown in FIGS. 2, 3, and 6, the air blow control unit configured as a functional circuit of the control device 13 controls the operation of each of the transport air supply units 34, 35, and 36 of the transport device 29 and is an accommodating unit. The delivery position of the object to be transported 28 in 33 is changed and adjusted.

The transport device 29 forms a transport air flow on the transport surface 46 of the bottom guide plate 44 of the transport guide unit 43 by the transport air supplied by each transport air supply unit 34, 35, 36, and puts the air flow on the transport air flow. The cutting waste is conveyed to the accommodating portion 33.

At this time, as shown in FIG. 4, by having the ventilation passage 48 between the plurality of convex portions 47 on the transport surface 46 of the bottom guide plate 44, the cutting debris on the transport surface 46 is removed. While being supported by the convex portion 47, a part of the transport air flows between the cutting debris and the transport surface 46 of the bottom guide plate 44 through the ventilation passage 48. Therefore, the resistance acting between the transport surface 46 of the bottom guide plate 44 and the cutting debris is reduced, and the energy consumption for blowing the cutting debris can be suppressed.

The blow control unit of the control device 13 controls the operation of each of the transport air supply units 34, 35, 36 of the transport device 13 to form an air flow distribution pattern on the transport surface 46 of the bottom guide plate 44. Then, the distribution pattern of the airflow is changed over time to change and adjust the delivery position of the object to be transported.

For example, in one airflow distribution pattern A, as shown in FIG. 2, the transport airflow flows through the central portion of the transport surface 46 of the bottom guide plate 44, and there is no transport airflow on both sides of the transport surface 46. In this airflow distribution pattern A, the object to be transported 28 that has fallen on the transport surface 46 of the bottom guide plate 44 is pushed to both sides of the transport surface 46, moves along the side guide plate 45, and is discharged from the transport guide portion 43. It is discharged to the accommodating portion 33 through the outlet 10a. Then, the cutting debris of the object to be transported 28 that falls into the accommodating portion 33 is piled up on both sides of the accommodating portion 33.

As shown in the operation pattern 1 in FIG. 6, the blast control unit of the control device 13 controls the operation and stop of each blast supply unit 34, 35, 36, and here, the central blast supply unit 35 is operated. This is realized by controlling to stop the other blower supply units 34 and 36.

In the other airflow distribution pattern B, as shown in FIG. 3, there is no transport airflow at the center of the transport surface 46 of the bottom guide plate 44, and there is a transport airflow on both sides of the transport surface 46. In this airflow distribution pattern B, the object to be transported 28 that has fallen on the transport surface 46 of the bottom guide plate 44 is pushed to the center of the transport surface 46 and moves, and is moved from the transport guide portion 43 through the discharge port 10a to the accommodating portion 33. Is discharged to. Then, the cutting debris of the object to be transported 28 that falls into the accommodating portion 33 is piled up in the center of the accommodating portion 33.

As shown in the operation pattern 2 in FIG. 6, the blast control unit of the control device 13 controls the operation and stop of each blast supply unit 34, 35, 36, and here, the central blast supply unit 35 is stopped. This is realized by controlling the operation of the other blower supply units 34 and 36.

Then, the airflow control unit of the control device 13 repeats the operation patterns 1 and 2, so that the airflow distribution patterns A and B are alternately formed on the transport surface 46 of the bottom guide plate 44. Therefore, the delivery position of the object to be transported 28 in the accommodating portion 33 is alternately changed, the position where the cutting debris of the object to be transported 28 is piled up in the accommodating portion 33 is changed, and the cutting debris is biased inside the accommodating portion 33. Be leveled. As a result, the cutting debris can be fully contained inside the accommodating portion 33, and the entire capacity of the accommodating portion 33 can be fully utilized.

The timing of switching to change the distribution pattern A or B of the airflow formed on the transport surface 46 of the transport guide unit 43 over time may be a timing with a predetermined time interval, and the time interval is fixed. It may be done by changing the time interval, or it may be set freely by manual operation.

Further, as the switching timing, the airflow distribution pattern A or B may be switched for each set number of sheets by using the number of sheets of the finished paper 12 as an index. Further, the airflow distribution pattern A or B may be switched at each set time using the operation time of the finishing portion 6 as an index. Further, the airflow distribution pattern A or B may be switched for each amount set using the amount of cutting waste stored in the storage unit 33 as an index.

Further, a blade swinging in the left-right direction may be provided at the air supply ports 37, 38, 39 of the transport air supply portions 34, 35, 36 to perform so-called swinging, and the transport surface 46 of the bottom guide plate 44 may be provided. The distribution pattern of the airflow formed above may be continuously changed over time.

Further, as shown in FIG. 7, three operation patterns 1, 2, and 3 are set. That is, in the operation pattern 1, the blower supply unit 34 on the left side is operated to stop the other blower supply units 35 and 36. The delivery position of the object to be transported 28 in the accommodating portion 33, that is, the position where the cutting chips are piled up is from the center to the right side.

In the operation pattern 2, the blast supply unit 36 on the right side is operated to stop the other blast supply units 34 and 35. The delivery position of the object to be transported 28 in the accommodating portion 33, that is, the position where the cutting chips are piled up is from the center to the left side.

In the operation pattern 3, the central blast supply unit 35 is operated to stop the other blast supply units 34 and 36. The delivery position of the object to be transported 28 in the accommodating portion 33, that is, the position where the cutting waste is piled up is on the right side and the left side.

Then, the ventilation control unit of the control device 13 repeats the operation patterns 1, 2, and 3, so that the delivery position of the transport target object 28 in the accommodating unit 33 is alternately changed, and the transport target object 28 is cut in the accommodating unit 33. The position where the debris is piled up changes, and the bias of the cutting debris is leveled inside the accommodating portion 33.

Further, the operation patterns 1, 2 and 3 may be sequentially switched at a predetermined time interval, or the operation patterns 1, 2 and 3 may be switched at a random order at a predetermined time interval.
(Two transport air supply units)
FIG. 8 shows an operation pattern when two transport air supply units (left side and right side) are provided. That is, in the operation pattern 1, the air supply unit on the left side is operated and the air supply unit on the right side is stopped. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the right side.

In the operation pattern 2, the air supply unit on the right side is operated and the air supply unit 34 on the left side is stopped. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the left side.

FIG. 9 shows an operation in which the operation pattern 3 is further added. In the operation pattern 3, both blower supply units are operated. The position where the cutting chips are piled up in the accommodating portion 33 is at the center. Then, the operation patterns 1, 2, and 3 are sequentially repeated.
(4 transport air supply units)
FIG. 10 shows an operation pattern when four transport air supply units (left side, center left, center right, right side) are provided. That is, in the operation pattern 1, the air supply unit on the left side and the center right is operated, and the air supply unit on the center left and right side is stopped. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the right side.

In the operation pattern 2, the air supply unit on the left side and the center right is stopped, and the air supply unit on the center left and the right side is operated. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the left side. The blow control unit of the control device 13 repeats the operation patterns 1 and 2.

Further, the operation pattern shown in FIG. 11 is also possible. That is, in the operation pattern 1, the air supply units on the left and center right are operated, and the air supply units on the left and right sides are stopped. The positions where the cutting chips are piled up in the accommodating portion 33 are on the left side and the right side.

In the operation pattern 2, the air supply unit on the left and the center right is stopped, and the air supply unit on the left side and the right side is operated. The position where the cutting chips are piled up in the accommodating portion 33 is at the center. The blow control unit of the control device 13 repeats the operation patterns 1 and 2.

In FIG. 12, in the operation pattern 1, the air blow supply unit on the left side is operated to stop the other air blow supply units. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the right side.

In the operation pattern 2, the blast supply unit on the right side is operated to stop the other blast supply units. The position where the cutting chips are piled up in the accommodating portion 33 is from the center to the left side.

In the operation pattern 3, the air supply unit on the center left and the center right is operated. Stop the air supply section on the left and right sides. The positions where the cutting chips are piled up in the accommodating portion 33 are on the left side and the right side. The blast control unit of the control device 13 sequentially repeats operation patterns 1, 2, and 3.
(5 transport air supply units)
FIG. 13 shows an operation pattern when five transport air supply units (left side, center left, center, center right, right side) are provided. That is, in the operation pattern 1, the left and right blast supply units are operated to stop the center left, center, and center right blast supply units. The position where the cutting chips are piled up in the accommodating portion 33 is at the center.

In the operation pattern 2, the air supply unit on the right side and the left side is stopped, and the air supply unit on the center left, the center, and the center right is operated. The positions where the cutting chips are piled up in the accommodating portion 33 are on the left side and the right side. The blow control unit of the control device 13 repeats the operation patterns 1 and 2.

Further, the operation pattern shown in FIG. 14 is also possible. That is, in the operation pattern 1, the air supply unit on the left side and the center is operated, and the air supply unit on the center left, the center right, and the right side is stopped. The positions where the cutting chips are piled up in the accommodating portion 33 are the center and the right side.

In the operation pattern 2, the air supply unit on the center and the right side is operated, and the air supply unit on the left side, the center left, and the center right is stopped. The positions where the cutting chips are piled up in the accommodating portion 33 are the left side and the center.

In the operation pattern 3, the air supply unit on the left and center right is operated, and the air supply unit on the left side, the center, and the right side is stopped. The position where the cutting chips are piled up in the accommodating portion 33 is at the center. The blast control unit of the control device 13 repeats operation patterns 1, 2, and 3.

In the present embodiment, the present invention has been described by exemplifying a wet recycled paper recycling apparatus for making paper from a pulp suspension, but the present invention can be applied not only to the recycled paper recycling apparatus but also to a dry paper making machine. be. In a dry paper machine, for example, in a fibrosis process, raw materials such as used paper are broken into fibers by mechanical means such as grinding to produce fibrous materials. Next, in the molding step, a resin material is mixed with the fiber as a binder to produce a mixed fiber, and the mixed fiber is further deposited to a predetermined width and a predetermined thickness to form a band-shaped deposit. Then, the strip-shaped deposit is heated and the fibers are bonded with a binder to form a molded paper. Next, the molded paper is cut into a predetermined size at the finishing portion to finish the paper. The present invention is applicable to this finished portion.

The transport guide unit 43 of the present embodiment is not always necessary. The object 28 to be transported, such as free-falling cutting debris, can be blown by the transport air from the transport air supply unit without being supported by the transport guide unit 43. Further, the accommodating portion 33 can be provided inside the paper machine main body 10.

Further, the recovery unit 27 of the present embodiment is not always necessary. The accommodating portion 33 accommodates the front and rear cutting scraps generated when the unnecessary portion of the front end or the rear end of the molding paper 21 in the transport direction is cut by the cutter device 23, and the defective molded paper 21 discharged by the reject device 24. Is also possible. In this case, the front-rear cutting debris and the molded paper 21 are blown toward the accommodating portion 33 by the conveying air from the conveying air supply unit or the separately provided transport air supply means, similarly to the cutting debris generated by the slitter device 26. Will be sent.

1 Paper making machine 2 Pulp liquid manufacturing part 3 Deinking part 4 Paper making part 5 Drying part 6 Finishing part 10 Paper making machine body 10a Discharge port 11 Recycled paper 12 Paper 13 Control device 21 Molding paper 22 Transfer roller vs. 23 Cutter device 24 Reject device 25 Calendar Equipment 25a, 25a Smooth roll 26 Slitter device 27 Recovery unit 28 Transport object 29 Transport device 30 Guide section 30a Drop path 31 Upstream guide plate 31a Lower end 32 Downstream guide plate 32a Bottom plate 33 Storage section 34, 35, 36 Transport wind Supply section 37, 38, 39 Air supply port 40, 41, 42 Fan device 43 Transport guide section 44 Bottom guide plate 45 Side guide plate 46 Transport surface 47 Convex section 48 Ventilation path

Claims (3)

A finishing part that finishes the molded paper formed in the previous process by cutting, a transporting device that blows the cut scraps generated in the finishing part as a transporting object, and a storage unit that houses the transported object to be blown. Equipped with a control device that controls the operation of the finish and the transfer device,
The transport device is provided with at least a plurality of transport air supply units that can be individually operated independently.
The control device has a blow control device, and the blow control device controls the operation of each transport air supply section of the transport device to change and adjust the delivery position of the transport object in the accommodating section.
The transport device has a transport guide section in which an object to be transported is blown on the transport surface of a guide plate extending from a plurality of transport air supply sections toward the accommodating section, and is provided by the transport wind supplied by each transport air supply section. An air flow is formed on the transport surface of the guide plate of the transport guide section,
The blow control device of the control device controls the operation of each transport air supply unit of the transport device to form an air flow distribution pattern on the transport surface of the guide plate, and changes the air flow distribution pattern over time to transport the target. A papermaking machine characterized by changing and adjusting the delivery position of goods . The papermaking machine according to claim 1, wherein the blast control device of the control device changes the distribution pattern of the air flow at a predetermined timing. The papermaking machine according to claim 1, wherein the transport device has a plurality of convex portions and a ventilation path between the convex portions on the transport surface of the guide plate.

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