Splicing device and paper supply device

Abstract

To provide a splicing device and a paper supply device that can perform deceleration control of the deceleration roll in accordance with the supply speed of the old paper when rapidly stopping the old paper by using a combination of brake control of the paper holder and deceleration control of the deceleration roll. [Solution] The acceleration / deceleration roll 55 of the splicing device 12 feeds out the old base paper 28A from the base paper roll 27A provided on the base paper holder 11 and reduces the supply speed V at which the old base paper 28A is fed out. The control device 45 performs deceleration control of the old base paper 28A by applying brakes with the brake mechanism 23 and decelerating with the acceleration / deceleration roll 55 in order to splice the old base paper 28A and the new base paper 28B. The control device 45 performs deceleration control based on the supply speed VL of the old base paper 28A, the maximum deceleration α at which the supply speed VL is reduced by the acceleration / deceleration roll 55, and the elapsed time TM2 from the start of deceleration until the deceleration A reaches the maximum deceleration α.

Description

[Technical Field]

[0001] The present invention relates to a splicing device for joining together base paper and a base paper supply device. [Background technology]

[0002] Conventionally, a splicing device exists that supplies old paper (hereinafter referred to as "old paper"), which is fed from the paper rolls of a paper holder, to subsequent processing equipment such as single facers and double facers, while simultaneously splicing another sheet of paper (hereinafter referred to as "new paper") to the old paper. This splicing device, for example, stops the rotation of the paper roll that is feeding the old paper currently in use, one of the pair of paper rolls provided by the paper holder, and splices the new paper drawn from the other paper roll to the old paper, while continuously supplying the old paper stored by the dancer mechanism to the subsequent processing equipment. Patent Document 1 below describes a splicing device that stops the rotation of the paper rolls by using an acceleration / deceleration roll to accelerate and decelerate the paper when splicing paper (web in the document). The splicing device in Patent Document 1 stops the old paper by driving the brake mechanism of the paper holder to apply braking force to the old paper roll, while controlling the speed of the acceleration / deceleration roll with a servo motor. The splicing device controls the speed of the acceleration / deceleration rolls to keep the magnitude of the torque transmitted to the old paper by the acceleration / deceleration rolls, and the rate of change of that torque, within acceptable limits when rapidly stopping the old paper. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-051370 (paragraphs 0013, 0015, Figure 1, Figure 4) [Overview of the project] [Problems that the invention aims to solve]

[0004] While Patent Document 1, mentioned above, describes controlling the deceleration of the acceleration / deceleration rolls within a range where the magnitude and rate of change of torque do not exceed upper limits in order to rapidly decelerate the base paper, it does not specifically describe how to control the deceleration of the acceleration / deceleration rolls in relation to the supply speed of the old base paper. Therefore, there was room for improvement in terms of how to control the deceleration of the acceleration / deceleration rolls in relation to the supply speed of the old base paper in the event of fluctuations in the supply speed of the base paper in order to rapidly stop the old base paper.

[0005] The present invention was made to solve the above-mentioned problems, and aims to provide a splicing device and a paper supply device that can perform deceleration control of the deceleration roll in accordance with the supply speed of the old paper when rapidly stopping the old paper by using a combination of brake control of the paper holder and deceleration control of the deceleration roll. [Means for solving the problem]

[0006] This specification discloses a splicing device comprising: a reduction roll that feeds out old base paper from a base paper roll provided on a base paper holder and reduces the speed at which the old base paper is fed out; a dancer mechanism that feeds out the old base paper fed out from the reduction roll to a subsequent process device while storing it, and changes the amount of old base paper stored according to the tension of the old base paper; a brake mechanism provided on the base paper holder that reduces the rotation of the base paper roll; and a control device that controls the deceleration of the old base paper by the reduction roll, wherein the control device performs braking by the brake mechanism and deceleration by the reduction roll to perform deceleration control of the old base paper in order to splice the old base paper with a new base paper different from the old base paper, and performs deceleration control of the reduction roll based on the supply speed of the old base paper fed out from the reduction roll, the maximum deceleration at which the supply speed of the old base paper is reduced by the reduction roll in the deceleration control, and the deceleration increase time from the start of deceleration by the reduction roll until the deceleration reaches the maximum deceleration. Furthermore, the present invention is not limited to being implemented as a splicing device, but is also extremely useful when implemented as, for example, a paper supply device comprising a splicing device and a paper holder. [Effects of the Invention]

[0007] According to the splicing device and paper supply device of the present invention, when rapidly stopping old paper by using both brake control of the paper holder and deceleration control of the deceleration roll, deceleration control of the deceleration roll can be performed in accordance with the supply speed of the old paper. [Brief explanation of the drawing]

[0008] [Figure 1] A front view of the paper supply device 10 according to this embodiment. [Figure 2] A front view showing the base paper 28 transparently, with some components (such as the control panel 25) of the base paper supply device 10 removed. [Figure 3] Block diagram of the paper feeder 10. [Figure 4] A diagram illustrating the forces acting on the base paper 28 and the position of the dancer roll 67. [Figure 5] This figure shows the graph display screen 91 displayed on the first operation unit 40. [Figure 6] A flowchart of the splicing process performed by the control device 45. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of the splicing device and base paper supply device of the present invention will be described with reference to the drawings. As shown in Figures 1 to 3, the base paper supply device 10 of this embodiment includes a base paper holder 11 and a splicing device 12. In the following description, as shown in Figures 1 and 2, the up / down, left / right, and front / back directions will be defined and described based on the direction in which the base paper supply device 10 is viewed from the front. In addition, the left / right direction in Figures 1 and 2 is the direction of the production line (which can also be called a corrugator line) in which the various devices of a corrugator that manufactures cardboard sheets are lined up, for example. Note that Figure 2 omits the illustration of the base paper roll transport trolley 24 and the floor 31, etc.

[0010] (Regarding the original paper mounting 11) First, let's describe the base paper holder 11. The base paper holder 11 includes a stand 21 (see Figure 2), a pair of chucking arms 22, a brake mechanism 23 (see Figure 3), a base paper roll transport trolley 24, and an operation panel 25. The splicing device 12, which will be described later, is a device that supplies base paper 28, which is fed from a base paper roll 27 attached to one of the pair of chucking arms 22 of the base paper holder 11, to a downstream device in the corrugator line, while splicing another base paper 28 onto the base paper 28 being supplied. The base paper supply device 10 is a device that, when a base paper roll 27 is replaced, supplies base paper 28 alternately from two base paper rolls 27, splicing the base paper 28 fed from each of the pair of chucking arms 22 of the base paper holder 11 together using the splicing device 12. In the following explanation, for the sake of clarity, the base paper 28 supplied before splicing (or joining) will be referred to as the old base paper 28A, and the letters "A" will be added to the reference numerals of the components related to the old base paper 28A, such as the chucking arm 22A and the base paper roll 27A. The base paper 28 to be joined to the old base paper 28A will be referred to as the new base paper 28B, and the letters "B" will be added to the reference numerals of the components related to the new base paper 28B, such as the chucking arm 22B and the base paper roll 27B. When referring to each component collectively without distinction, the base paper 28, chucking arm 22, etc. will be used without adding "A" or "B" to the reference numerals. In this embodiment, as an example, the base paper 28 fed from the left base paper roll 27 will be described as the old base paper 28A.

[0011] In this specification, the downstream equipment refers to, for example, a single facer and a double facer. A single facer is a device that produces a single-sided corrugated cardboard sheet by forming corrugated layers from base paper 28 (core) supplied from a base paper supply device 10 using an upper roll and a lower roll, and then laminating this corrugated layered core with base paper 28 (back liner) supplied from another base paper supply device 10. A double facer is a device that produces a double-sided corrugated cardboard sheet by laminating the single-sided corrugated cardboard sheet with base paper 28 (front liner) supplied from another base paper supply device 10.

[0012] The stand 21 is fixed, for example, to the floor 31 of the production plant where the paper feeder 10 is installed. The stand 21 is installed at the lower end of the central part of the paper feeder 10 in the left-right direction. The pair of chucking arms 22 have a structure that is symmetrical with respect to a line passing through the center of the paper feeder 10 in the left-right direction and parallel to the vertical direction. For this reason, in the following description, the chucking arm 22A of the pair of chucking arms 22A and 22B will be mainly described, and the description of the other chucking arm 22B will be omitted as appropriate.

[0013] A pair of chucking arms 22A are rotatably mounted to the stand 21 via a pair of rotating shafts 32A provided on the stand 21. Each of the pair of chucking arms 22A extends outward from the rotating shafts 32A in the left-right direction, and a base paper roll 27A can be attached to its tip 33A. The base paper roll 27 is a roll-shaped member in which base paper 28 is wound around a paper tube, and the base paper 28 can be fed out and used. The base paper roll 27 is replaced with a base paper roll 27 that feeds out different base paper 28 depending on the specifications (paper quality, size, etc.) of the corrugated cardboard sheet to be manufactured. The pair of chucking arms 22A have two arms that face each other in the front-rear direction. Therefore, the pair of chucking arms 22 have a total of four arms (two arms of chucking arm 22A and two arms of chucking arm 22B). In the following description, the two arms of one of the chucking arms 22A will be referred to as "the two arms". The two arms of the chucking arm 22A can be changed to a predetermined rotation angle around the rotation axis 32A. Therefore, the tips 33A of the two arms can move along a circle with the chucking arm 22 as the radius, around the rotation axis 32A.

[0014] The tip portions 33A in each of the two arms are arranged at positions facing each other with a predetermined interval in the front-rear direction. Each tip portion 33A of the two arms has a chuck 35A on the inner side in the front-rear direction. The two arms hold the paper roll 27A of the base paper roll rotatably by inserting and sandwiching the chucks 35A of each tip portion 33A from both sides in the front-rear direction (the width direction of the base paper 28). The brake mechanism 23 is a mechanism for restricting the rotation of the base paper roll 27. The brake mechanism 23 is, for example, an air-type disk brake, which is provided at each tip portion 33 and the force for sandwiching the disk that rotates together with the chuck 35A with a disk pad can be changed by the pressure of air supplied from an air supply device (not shown). The brake mechanism 23 controls the disk pad of the disk brake and changes the braking force to restrict the rotation of the base paper roll 27. Note that the brake mechanism in this specification is not limited to an air-type disk brake, and a disk brake using a hydraulic cylinder may also be used. Further, the brake mechanism in this specification is not limited to a disk brake, and other types of brake mechanisms such as an electromagnetic brake may also be used.

[0015] The paper roll transport trolley 24A is positioned below the tip 33A of the chucking arm 22A. A pit 37A for housing the paper roll transport trolley 24A is formed in the floor 31. The pit 37A is, for example, a groove formed in the floor 31 along the front-rear direction and having an opening on its upper surface. The paper roll transport trolley 24A is slidable in the front-rear direction along the pit 37A and moves in the front-rear direction with the next paper roll 27 to be used or a used paper roll 27 placed on top of it. The paper roll transport trolley 24A may also be equipped with a lifting mechanism that moves up and down with the paper roll 27A placed on it. This allows the height of the paper roll 27A placed on the paper roll transport trolley 24A to be changed by the lifting mechanism, thereby aligning the position of the paper core of the paper roll 27A with the position of the chuck 35A. Furthermore, the paper holder 11 may be configured to include one or more paper roll transport trolleys 24. For example, the paper holder 11 may be configured to include a third paper roll transport trolley 24 positioned between a pair of chucking arms 22 in the left-right direction. Alternatively, the paper holder 11 may be configured not to include any paper roll transport trolleys 24. In this case, the operator may transport the paper rolls 27 manually.

[0016] The control panel 25 is located in the center of the paper supply device 10 in the left-right direction, in front of the stand 21. The control panel 25 is, for example, roughly rectangular in shape and is fixed upright on the floor 31. The control panel 25 is provided with a first control unit 40, which is the control unit for the splicing device 12, and a second control unit 41, which is the control unit for the paper holder 11. The first and second control units 40 and 41 are arranged vertically on the front of the control panel 25. The first and second control units 40 and 41 are user interfaces and have, for example, touch panels and various operation switches. The first control unit 40 displays information related to the splicing device 12 and accepts operation inputs to change the settings of the splicing device 12. Similarly, the second control unit 41 displays information related to the paper holder 11 and accepts operation inputs to change the settings of the paper holder 11.

[0017] Furthermore, the configurations of the first and second operation units 40 and 41 are not limited to the above-described configurations. For example, the first and second operation units 40 and 41 may be configured to include a liquid crystal monitor instead of a touch panel, a configuration including only a touch panel, or a configuration including only operation switches. Also, the operation unit of the splicing device 12 and the operation unit of the paper feeder 11 may be the same device. That is, the first and second operation units 40 and 41 may be a single operation unit. Further, the first and second operation units 40 and 41 may be provided on the housing 49 or the like of the splicing device 12. Alternatively, the first operation unit 40 may be provided on the housing 49 or the like (on the side of the splicing device 12), and the second operation unit 41 may be provided on the operation panel 25 or the like (on the side of the paper feeder 11).

[0018] (Regarding the splicing device 12) Next, the splicing device 12 will be described. As shown in FIGS. 1 to 3, in addition to the first operation unit 40 described above, the splicing device 12 includes a control device 45 (see FIG. 3), external interfaces 46 and 47 (see FIG. 3), a communication interface 48 (see FIG. 3), a housing 49 (see FIG. 2), a dancer mechanism 51, a first encoder 53 (see FIG. 3), a splicing head 54, an acceleration / deceleration roll 55, an inlet roll 56, an outlet roll 57, a pressure roll 58, and the like. The control device 45 includes, for example, a CPU and a memory, and comprehensively controls the operation of the splicing device 12. The splicing device 12 includes a plurality of drive circuits 61 that connect the control device 45 to each device of the splicing device 12 (the dancer mechanism 51, the first encoder 53, the splicing head 54, the acceleration / deceleration roll 55, the inlet roll 56, the pressure roll 58). The drive circuit 61 is, for example, a driver circuit that drives each drive source, an amplifier circuit that amplifies each signal, or the like.

[0019] The control device 45 is connected to the brake mechanism 23 of the paper holder 11 via an external interface 46. The control device 45 can change the braking force by controlling the disc pads of the disc brake of the brake mechanism 23 via the external interface 46. The control device 45 is also connected to the first operation unit 40 of the control panel 25 via an external interface 47. The control device 45 performs processing to change the display content of the touch panel of the first operation unit 40 and input signals corresponding to operation inputs to the first operation unit 40 via the external interface 47.

[0020] Furthermore, the communication interface 48 is, for example, a LAN interface and is connected to the LAN of the production plant where the base paper supply device 10 is installed. The control device 45 is connected to the management device 50 via the communication interface 48. The management device 50 is a device that manages the corrugator line, manages the number of corrugated cardboard sheets produced and the contents of orders, and sends commands to each device that makes up the corrugator line. Note that the communication interface 48 may be a wired communication interface or a wireless communication interface.

[0021] The housing 49 has a box-like shape that is long in the left-right direction. The housing 49 is suspended from a bridge (not shown) of the corrugator line via a pair of connecting parts 63 and its position is fixed. As shown in Figure 2, the base paper 28 unwound from the base paper roll 27 is supplied to the downstream equipment from the upstream side to the downstream side via a splice head 54, acceleration / deceleration roll 55, inlet roll 56, dancer mechanism 51, and outlet roll 57. The dancer mechanism 51 comprises a group of dancer rolls 65 and an air cylinder 66 (see Figure 3). The group of dancer rolls 65 comprises a plurality (four in this embodiment) of dancer rolls 67 arranged in the left-right direction and a frame 68 that holds the dancer rolls 67. For example, the plurality of dancer rolls 67 are held by the frame 68 with a predetermined distance between them in the left-right direction. The dancer mechanism 51 has a slide rail provided on the housing 49, and with the base paper 28 wound in multiple stages on a plurality of dancer rolls 67, the dancer roll group 65 slides along this slide rail in the left-right direction. The dancer mechanism 51 changes the amount of base paper 28 stored in the dancer mechanism 51 by changing the left-right position of the dancer roll group 65. The dancer rolls 67 are, for example, roller-shaped members and are rotatably mounted on the frame 68. Similarly, other members referred to as rolls (acceleration / deceleration rolls 55, inlet rolls 56, etc.) are also, for example, roller-shaped members and are rotatably mounted on the housing 49, etc. Furthermore, the dancer mechanism 51 may be configured to have only one dancer roll 67, or to have two, three, or five or more dancer rolls 67. Hereinafter, the dancer roll group 65 may simply be referred to as the dancer rolls 67.

[0022] When the dancer roll 67 moves to the right, the amount of base paper 28 stored decreases. Conversely, when the dancer roll 67 moves to the left, the amount of base paper 28 stored increases. In the following explanation, as shown in Figure 4, when describing the dancer roll 67, the left direction may be referred to as the paper storage side and the right direction as the paper feeding side. Also, Figure 2 shows the dancer roll 67 at the operating position P1, which will be described later, with a solid line, and the dancer roll 67 that has moved furthest towards the paper feeding side is shown with a dashed line. The position shown by this dashed line is, for example, the position where the amount of base paper 28 stored becomes zero.

[0023] The air cylinder 66 is connected to the rod and frame 68 via connecting members such as chains and gears (not shown). The air cylinder 66 applies a force to the dancer roll 67 that moves it toward the paper storage side (leftward) according to the cylinder pressure. The control device 45 receives a set value for the cylinder pressure of the air cylinder 66 in response to an operation input to the first operation unit 40, for example. This cylinder pressure is maintained at a constant value during normal operation and when splicing the base paper 28. Before production, the operator can operate the first operation unit 40 to set the cylinder pressure to an appropriate value according to the paper quality, thickness, and tension applied to the base paper 28 used in production, thereby suppressing the occurrence of tears and wrinkles in the base paper 28.

[0024] As shown in Figure 4, during normal operation, the splicing device 12 controls the dancer roll 67 to remain at a predetermined operating position P1 in order to store the base paper 28. Normal operation refers to a state in which the base paper 28 is supplied to subsequent processing equipment without performing operations such as splicing the base paper 28. The position of the dancer roll 67 is, for example, the center of the dancer roll group 65 (frame 68) in the left-right direction. Therefore, when the dancer roll 67 is positioned at operating position P1, it means that the center of the dancer roll group 65 in the left-right direction is located at operating position P1.

[0025] The position of the dancer roll 67 fluctuates according to the balance of three forces: the tension T1 exerted by the downstream equipment pulling the base paper 28, the tension T2 of the base paper 28 generated by the brake mechanism 23 of the base paper holder 11, and the force F exerted by the air cylinder 66 to move the dancer roll 67 toward the paper storage side. For example, when the sum of tensions T1 and T2 becomes greater than force F, the dancer roll 67 moves toward the paper feeding side, and the amount of base paper 28 stored decreases. Conversely, when the sum of tensions T1 and T2 becomes less than force F, the dancer roll 67 moves toward the paper storage side, and the amount of base paper 28 stored increases. Also, when the sum of tensions T1 and T2 balances force F, the movement of the dancer roll 67 stops.

[0026] Note that in order to avoid making the drawing too complex, some parts of the old base paper 28A are omitted from Figure 4. Also, the control device 45 may change the force F by controlling the cylinder pressure of the air cylinder 66 during normal operation or when joining the base paper 28. Furthermore, the device that applies force F to the dancer roll 67 is not limited to a fluid pressure cylinder, but may also be a device using other drive sources such as a motor.

[0027] The first encoder 53 is, for example, a rotary encoder and is attached to a gear connecting the air cylinder 66 and the dancer roll 67, and outputs encoder information to the control device 45 according to the rotational position of the gear. This encoder information is position information indicating the position of the dancer roll 67 in the left-right direction. For this reason, the encoder information will be referred to as position information below. The control device 45 detects the position of the dancer roll 67 in the left-right direction based on the position information of the first encoder 53. Note that the method for detecting the position of the dancer roll 67 is not limited to using a rotary encoder; other devices such as linear encoders, sensors, or potentiometers may also be used.

[0028] The control device 45 performs brake control, which changes the braking force of the brake mechanism 23 according to the position of the dancer roll 67 in the left-right direction. When the control device 45 detects that the dancer roll 67 has moved from the operating position P1 towards the paper storage side based on the position information of the first encoder 53, it increases the braking force of the brake mechanism 23 of the base paper holder 11. This increases the tension T2 of the base paper 28 wound around the dancer roll 67, allowing the dancer roll 67 to move towards the paper feeding side. Conversely, when the control device 45 detects that the dancer roll 67 has moved from the operating position P1 towards the paper feeding side based on the position information of the first encoder 53, it decreases the braking force of the brake mechanism 23. This decreases the tension T2, allowing the dancer roll 67 to move towards the paper storage side. In this way, the control device 45 adjusts the braking force of the brake mechanism 23 and maintains a balance between tension T1, force F, and tension T2, thereby controlling the dancer roll 67 to remain at the operating position P1.

[0029] The splice head 54 is a device that joins the old base paper 28A and the new base paper 28B. For example, the splice head 54 can adopt the configuration described in Japanese Patent Application Publication No. 2009-018935. Therefore, a detailed explanation of the splice head 54 is omitted. The splice head 54 is located below the dancer mechanism 51. The splice head 54 in this embodiment has a pair of head sections 54A and 54B. The pair of head sections 54A and 54B are individually movable in the left-right direction based on the drive of a drive unit 54C (see Figure 3), such as a motor, provided in the splice device 12. The splice head 54 may also have a configuration in which the head sections 54A and 54B move integrally, as in the splice head described in Japanese Patent Application Publication No. 2009-018935.

[0030] The head unit 54A is equipped with an auxiliary roll 71A and a paper splicing mechanism (not shown), etc. Old base paper 28A, which is unwound from the base paper roll 27A, is wound onto the head unit 54A via an auxiliary roll 73A located at the bottom of the splicing device 12. Similarly, the head unit 54B is equipped with an auxiliary roll 71B and a paper splicing mechanism (not shown), etc. New base paper 28B, which is unwound from the base paper roll 27B, is wound onto the head unit 54B via an auxiliary roll 73B located at the bottom of the splicing device 12. The paper splicing mechanisms of the head units 54A and 54B are equipped with a nip bar, knife, drag bar, etc., necessary for splicing the base paper 28.

[0031] For example, each of the pair of head units 54A and 54B is positioned in the preparation position shown in Figure 1 when in standby mode and not supplying base paper 28, and is positioned in the splicing position shown in Figure 2 when splicing is performed or while supplying base paper 28. In this embodiment, the preparation position is at both ends in the left-right direction, and the splicing position is at the center in the left-right direction.

[0032] For example, when supplying old base paper 28A, the head unit 54A is positioned at the splicing position, and the head unit 54B is positioned at the preparation position. The paper splicing mechanism is equipped with, for example, a mechanism for holding the base paper 28 between them, and a mechanism for holding the base paper 28 by suction. Therefore, when the operator starts the splicing operation from old base paper 28A to new base paper 28B, for example, the operator attaches the leading edge of the new base paper 28B, which has been unfurled from the base paper roll 27B, to the head unit 54B positioned at the preparation position.

[0033] Once the operator has finished loading the new base paper 28B, they move the head unit 54B to the splicing position. This completes the preparation of the splicing device 12 for splicing, and it continues to discharge the old base paper 28A while waiting for a paper splicing command (also called a splice signal) from the corrugator line management device 50. The management device 50 sends a paper splicing command to the splicing device 12 in accordance with the timing of lot changes, etc. When the control device 45 receives a paper splicing command from the management device 50, it controls the brake mechanism 23 of the base paper holder 11 to set the supply speed of the old base paper 28A to 0. In addition, the control device 45 in this embodiment performs deceleration using the acceleration / deceleration roll 55 and stops the rotation of the base paper roll 27A. After receiving a paper splicing command from the management device 50, the control device 45 detects that the supply speed of the old base paper 28A has become 0 based on the encoder information of the second encoder 79 of the inlet roll 56, which will be described later, and drives the head units 54A and 54B to splice the base paper 28. Once the splicing of the base paper 28 is complete, the control device 45 sends a response to the management device 50 indicating that it has been completed.

[0034] The base paper 28, fed from the splice head 54, is wound onto the dancer roll 67 via an acceleration / deceleration roll 55, an auxiliary roll 75, and an inlet roll 56. The acceleration / deceleration roll 55 is positioned above the splice head 54, which is located at the splicing position. The acceleration / deceleration roll 55 is connected to the output shaft of a motor 77 (see Figure 3) of the splicing device 12 via gears, etc., and rotates in accordance with the rotational drive of the motor 77. The motor 77 is, for example, a servo motor, and its rotational speed, acceleration, and deceleration are changed based on the control of the control device 45. The motor 77 may also be configured to change the rotational torque and rotational speed of the acceleration / deceleration roll 55 based on the control of the control device 45. Furthermore, the control device 45 performs deceleration control to reduce the rotation of the acceleration / deceleration roll 55 when the supply speed of the old base paper 28A is set to 0 speed in conjunction with the start of the splicing operation of the base paper 28. Furthermore, after the splice head 54 has completed splicing the base paper 28, the control device 45 performs acceleration control to accelerate the rotation of the acceleration / deceleration roll 55 when it starts supplying new base paper 28B from the base paper roll 27B that feeds out the spliced ​​new base paper 28B. For example, the control device 45 rotates the acceleration / deceleration roll 55 clockwise in Figure 4 to feed out the base paper 28. Note that the acceleration / deceleration roll 55 is an example of a deceleration roll as described herein. The acceleration / deceleration roll 55 may be a roll used for only one of the acceleration control or deceleration control described above. Also, the motor 77 of the acceleration / deceleration roll 55 is not limited to a servo motor, but may be other types of motors such as a stepping motor.

[0035] The pressure roll 58 is positioned opposite the acceleration / deceleration roll 55, with the base paper 28 wound around the acceleration / deceleration roll 55 in between. The splicing device 12 includes a drive unit 78 (see Figure 3) that moves the pressure roll 58 and changes the distance between the pressure roll 58 and the acceleration / deceleration roll 55. For example, a fluid pressure cylinder or a motor can be used as the drive unit 78. Alternatively, the splicing device 12 may be configured to change the distance between the pressure roll 58 and the acceleration / deceleration roll 55 by moving the acceleration / deceleration roll 55, either by making the pressure roll 58 movable or by adding the movement of the acceleration / deceleration roll 55.

[0036] The control device 45 controls the drive unit 78 to move the pressure roll 58 toward the acceleration / deceleration roll 55, thereby sandwiching the base paper 28 wound on the acceleration / deceleration roll 55 between the pressure roll 58 and the acceleration / deceleration roll 55. For example, during normal operation, the control device 45 positions the pressure roll 58 away from the base paper 28 wound on the acceleration / deceleration roll 55. When the brake mechanism 23 reduces the supply speed of the base paper 28 to 0 in conjunction with the splicing operation of the base paper 28, the control device 45 controls the drive unit 78 to sandwich the base paper 28 between the pressure roll 58 and the acceleration / deceleration roll 55. This reduces the slack in the base paper 28 from the base paper roll 27 to the splice head 54.

[0037] The inlet roll 56 is positioned within the housing 49, near the end on the paper-feeding side, and winds the base paper 28 from the acceleration / deceleration roll 55 to the dancer roll 67, and then feeds the base paper 28 unwound from the base paper roll 27 to the dancer roll 67. The acceleration / deceleration roll 55 is positioned between the splice head 54 and the inlet roll 56 in the direction of conveying the base paper 28. Unlike the acceleration / deceleration roll 55, the inlet roll 56 is not connected to a drive source for rotation (self-rotation), such as a motor 77. The inlet roll 56 is rotatably mounted to the housing 49 and rotates in accordance with the movement (conveyance) of the wound base paper 28. In addition, in the splicing device 12 of this embodiment, a second encoder 79 for detecting the supply speed, which is the speed at which the base paper 28 is supplied, is attached to the inlet roll 56. Therefore, the inlet roll 56 is rotatably mounted in response to external forces and rotates in accordance with the conveyance of the old base paper 28A from the acceleration / deceleration roll 55 toward the dancer mechanism 51. The second encoder 79 is, for example, a rotary encoder and outputs encoder information (an example of rotation position information as defined herein) corresponding to the rotational position of the inlet roll 56. Based on the encoder information from the second encoder 79, the control device 45 detects the supply speed of the base paper 28, the distance the base paper 28 has been unfed, and the like.

[0038] The dancer mechanism 51 also has a plurality of auxiliary rolls 81 for winding the base paper 28 unwound from the dancer roll 67. The plurality of auxiliary rolls 81 are located near the paper-feeding end of the housing 49 and are positioned vertically, with the dancer roll 67 in between them. For example, the base paper 28 is wound so that it is folded back alternately in sequence between the plurality of dancer rolls 67 and the plurality of auxiliary rolls 81. This allows the dancer roll 67 to store the base paper 28. The exit roll 57 is located at the paper-feeding end of the housing 49. The exit roll 57 is wound with the base paper 28 that has been folded back by the plurality of dancer rolls 67 and the plurality of auxiliary rolls 81. The base paper 28 unwound from the exit roll 57 is transported to a subsequent processing device.

[0039] (Regarding deceleration control during the splicing process of base paper 28) As described above, in the splicing operation of the base paper 28, the control device 45 performs deceleration control of the old base paper 28A by applying brakes with the brake mechanism 23 and decelerating with the acceleration / deceleration roll 55 in order to splice the old base paper 28A and the new base paper 28B. The control device 45 performs deceleration control of the acceleration / deceleration roll 55 based on the supply speed of the old base paper 28A fed out from the acceleration / deceleration roll 55, the maximum deceleration at which the supply speed of the old base paper 28A is reduced by the acceleration / deceleration roll 55 in the deceleration control, and the deceleration increase time (in this embodiment, the elapsed time TM2 described later) from the start of deceleration by the acceleration / deceleration roll 55 until the deceleration reaches the maximum deceleration.

[0040] More specifically, Figure 5 shows the graph display screen 91 that the control device 45 displays on the first operation unit 40. When the control device 45 receives a predetermined operation input to the first operation unit 40, it displays the graph display screen 91 on the touch panel of the first operation unit 40. As shown in Figure 5, the control device 45 displays the graph 92, the maximum deceleration column 93, the elapsed time column 94, the update button 95, and the exit button 96 on the graph display screen 91. The control device 45 displays the maximum deceleration column 93, etc., below the graph 92.

[0041] Graph 92 shows the relationship between the supply speed V and time t in deceleration control. The vertical axis of Graph 92 represents the supply speed V at which the acceleration / deceleration roll 55 feeds the old base paper 28A toward the inlet roll 56. The horizontal axis represents time t(s). Time t0 in Graph 92 is the time when the splicing device 12 receives a paper splicing command from the control device 50. Time t1 is the time when deceleration control begins, and when control to increase the tension of the old base paper 28A begins. Time t2 is the time when deceleration by the acceleration / deceleration roll 55 begins. Time t3 is when the deceleration A reaches its maximum deceleration α(m / s) 2 This is the time to reach ). Time t4 is the time when the supply rate V becomes zero. Also, elapsed time TM0 indicates the time from time t0 to t1, elapsed time TM1 indicates the time from time t1 to t2, elapsed time TM2 indicates the time from time t2 to t3, and elapsed time TM3 indicates the time from time t3 to t4. The control device 45 displays, for example, the graph 92 of the previous operation when the base paper 28 was joined on the graph display screen 91.

[0042] After receiving a paper splicing command at time t0, the control device 45 does not start deceleration control until time t1. Therefore, the supply speed V fluctuates according to the brake control which changes the braking force to keep the dancer roll 67 in the operating position P1, the tension T1 that the downstream equipment pulls on the base paper 28, and the speed at which the downstream equipment feeds out the base paper 28. At elapsed time TM0, the control device 45 supplies the old base paper 28A to the downstream equipment while executing brake control to keep the dancer roll 67 in the operating position P1. Note that since deceleration control is not executed at elapsed time TM0, Figure 5 shows the supply speed V at elapsed time TM0 approximated linearly using the supply speed V at time t1, which is VL.

[0043] Next, at time t1, or in other words, before deceleration by the acceleration / deceleration roll 55 begins at time t2 or later, the control device 45 starts braking control using the braking mechanism 23. For example, at time t1, the control device 45 increases the braking force to prevent the old paper 28A being fed out from the paper roll 27A from becoming loose when deceleration by the acceleration / deceleration roll 55 begins. The control device 45 controls the braking mechanism 23 to increase the braking torque of the old paper 28A against the paper roll 27A (increasing the braking force) while controlling the rotational speed of the acceleration / deceleration roll 55 so that the supply speed V of the old paper 28A is maintained at the current speed (VL). The braking force is set according to, for example, the width of the paper 28 used in production and the diameter of the paper roll 27. For example, the paper holder 11 is equipped with a sensor (not shown) that detects the outer diameter (radius, etc.) of the paper roll 27, and the splicing device 12 changes the braking force using the braking mechanism 23 based on the length of the diameter of the paper roll 27 detected by the sensor. The control device 45 reduces the braking force as the diameter of the base paper roll 27 decreases, for example. The old base paper 28A is pulled at its base end by the base paper roll 27A to which braking force is applied, and at its front end by the acceleration / deceleration roll 55 which is trying to maintain the supply speed VL. The old base paper 28A is pulled at both ends, increasing the tension between the base paper roll 27A and the acceleration / deceleration roll 55, and reducing slack in this area. In addition, although the old base paper 28A is subjected to braking force, it is pulled by the acceleration / deceleration roll 55, so it is transported while maintaining the supply speed V at the current speed (VL).

[0044] Furthermore, at time t1, the control device 45 drives the drive unit 78 to move the pressure roll 58 toward the acceleration / deceleration roll 55, sandwiching the old base paper 28A between the pressure roll 58 and the acceleration / deceleration roll 55. This increases the frictional force between the old base paper 28A and the acceleration / deceleration roll 55, and even if the old base paper 28A is pulled toward the base paper roll 27A by brake control, it is possible to suppress the old base paper 28A from slipping toward the acceleration / deceleration roll 55. The supply speed of the old base paper 28A can be maintained at the current speed (VL). The deceleration by the acceleration / deceleration roll 55 from time t2 onward can be appropriately applied to the old base paper 28A. The elapsed time TM1 is the time required to increase the tension of the old base paper 28A between the base paper roll 27A and the acceleration / deceleration roll 55 to the desired tension. For example, from time t1 to t4, the control device 45 executes the control to sandwich the old base paper 28A with the pressure roll 58 as described above. Furthermore, the control device 45 may perform the control of clamping with the pressure roll 58 only during at least one of the elapsed times TM1, TM2, and TM3. Also, the control device 45 does not have to perform the control of clamping with the pressure roll 58 while deceleration control is being performed.

[0045] Next, the control device 45 starts deceleration by the acceleration / deceleration roll 55 at time t2. The control device 45 sets the deceleration A of the acceleration / deceleration roll 55 to a predetermined jerk (jerk, m / s²). 3 The supply speed V is reduced while increasing by j. The control device 45 increases the deceleration A until it reaches the maximum deceleration α during the elapsed time TM2. Therefore, at time t3, the deceleration A reaches the maximum deceleration α.

[0046] The jerk j and maximum deceleration α are preset values. As shown in Figure 5, the control device 45 accepts, for example, the set value of the maximum deceleration α in the maximum deceleration column 93 and the set value of the elapsed time TM2 in the elapsed time column 94. When the control device 45 displays, for example, the graph display screen 91, it displays the currently set value of the maximum deceleration α in the maximum deceleration column 93 and the set value of the elapsed time TM2 in the elapsed time column 94. When at least one of the set values ​​in the maximum deceleration column 93 and the elapsed time column 94 is changed and the update button 95 is operated, the control device 45 updates the value stored in memory with the changed set value. The control device 45 performs deceleration control based on the accepted set values.

[0047] As described above, the control device 45 controls the supply speed V to be maintained at VL during the elapsed time TM1. As shown in Figure 5, the supply speed V is reduced from time t2. When the supply speed V is reduced, the amount stored in the dancer roll 67 decreases according to the speed difference between the supply speed V and the speed of the base paper 28 conveyed by the downstream equipment. At time t4, when the supply speed V becomes zero and the supply of the old base paper 28A has stopped, the control device 45 performs splicing with the splice head 54 (from time t4 to t5). After splicing is completed, at time t5, the control device 45 starts supplying the new base paper 28B and performs acceleration control with the acceleration / deceleration roll 55. Therefore, the shorter the elapsed time TM2, the more the decrease in the amount stored during deceleration control can be suppressed, and the less likely it is that the speed of the downstream equipment will have to be reduced because the amount stored during splicing will be insufficient. On the other hand, the shorter the elapsed time TM2, the greater the jerk j, and the greater the burden on the base paper 28. The tension applied to the base paper 28 by the exit roll 57 of the splicing device 12 fluctuates, causing wrinkles and other damage to the base paper 28, which can lead to errors such as poor bonding in subsequent processing equipment. Therefore, the operator can set an appropriate value for the elapsed time TM2 by checking for wrinkles in the base paper 28 and the status of subsequent processing equipment.

[0048] Furthermore, the control device 45 maintains the maximum deceleration α until the supply speed V becomes zero during the elapsed time TM3. Therefore, the length of the elapsed time TM3 becomes shorter as the maximum deceleration α increases, and longer as the maximum deceleration α decreases. Thus, the operator can shorten the elapsed times TM2 and TM3 by changing the maximum deceleration α and the elapsed time TM2 according to the supply speed VL. This allows for the rapid stopping of the old base paper 28A and reduces the decrease in the amount of stored material.

[0049] Furthermore, the control device 50 transmits a paper splicing command when the length to the trailing end of the old base paper 28A (hereinafter referred to as the splicing position PS), where production ends due to splicing of the base paper 28, reaches the standard remaining length Lth. As will be described later, the control device 45 controls the machine so that the point at which this standard remaining length Lth has been unfed is time t4, that is, the point at which the supply speed V becomes zero, and controls the machine so that the splicing position PS stops at the position of the splice head 54. On the other hand, depending on the set values ​​of the elapsed time TM2 and the maximum deceleration α, there is a risk that the old base paper 28A may slip in the acceleration / deceleration roll 55, causing the splicing position PS to stop at a position shifted from the splice head 54. For this reason, the operator can set a more appropriate elapsed time TM2 and maximum deceleration α by changing the maximum deceleration α and elapsed time TM2 to shorten the deceleration control time, as well as by checking whether the desired splicing position PS has stopped at the position of the splice head 54. Furthermore, when the exit button 96 in Figure 5 is pressed, the control device 45 will terminate the display on the graph display screen 91. The control device 45 does not need to accept changes to the set values ​​of the maximum deceleration α or the elapsed time TM2. The control device 45 may also accept changes to set values ​​other than the maximum deceleration α and elapsed time TM2, such as the elapsed time TM1 and the jerk j.

[0050] Furthermore, in Graph 92, the size of the area enclosed by the graph and each axis, etc., at each elapsed time indicates the length of the base paper 28 fed out from the splicing device 12 during that elapsed time. The pre-control length L0 is the length of the old base paper 28A fed out from the splicing device 12 to the subsequent process device during the elapsed time TM0 from time t0 to t1. The first length L1 is the length fed out during the elapsed time TM1 from time t1 to t2. The second length L2 is the length fed out during the elapsed time TM2 from time t2 to t3. The third length L3 is the length fed out during the elapsed time TM3 from time t3 to t4. The control device 45 calculates the first to third lengths L1 to L3 in the splicing process shown in Figure 6, which will be described later. For this reason, the calculation method for each length will be explained below.

[0051] (Regarding the first length L1) As described above, the supply rate V at elapsed time TM1 is maintained at VL. Therefore, the first length L1 can be calculated using the supply rate VL at time t1 by the following equation (1). L1 = VL × TM1 ····(1)

[0052] (Regarding the second length L2) Furthermore, the second length L2 can be calculated using the following equation (2). L2 = (-1 / 6) × j × TM2 3 +VL×TM2 ····(2) More specifically, the second length L2 is the length that the acceleration / deceleration roll 55 feeds out over a period of time TM2 while decelerating from a state where it is supplying at a supply speed VL. The supply speed V(t), which changes with the passage of time t within the elapsed time TM2, can be calculated using the deceleration A of the acceleration / deceleration roll 55 by the following equation (3). V(t) = -At + VL ····(3) Furthermore, the deceleration A can be calculated using the jerk j by the following equation (4). A = jt + a0 ... (4) Note that a0 is the initial value of the deceleration A, and since the initial value is zero at time t2, a0 is zero. Also, V(t) can be expressed as equation (5) by integrating equation (4) with respect to time t. V(t) = (1 / 2) × j × t 2 +V0 ····(5) Furthermore, by comparing equations (3) and (5), we can derive equation (6). V(t) = (1 / 2) × j × t 2 +VL ····(6) By integrating equation (6) with respect to time t, the change in L(t) over time t within the elapsed time TM2 can be expressed by the following equation (7). L(t) = (1 / 6) × j × t 3 +VL×t ····(7) Therefore, by setting t = TM² in equation (7), we can derive equation (2).

[0053] (Regarding the third length L3) Furthermore, during the elapsed time TM3, the acceleration / deceleration roll 55 travels at its maximum deceleration α until the supply speed V becomes zero. Therefore, the maximum deceleration α corresponds to the slope of the graph for the elapsed time TM3, and if the supply speed V at time t3 is V1 as shown in Figure 5, then the maximum deceleration α is expressed by the following equation (8). α = V1 / TM3 ····(8) Furthermore, the third length L3 corresponds to the area over elapsed time TM3 and can be calculated using the following equation (9). L3=(1 / 2)×TM3×V1=(1 / 2)×TM3×α×TM3 = (1 / 2) × α × TM3 2 ...(9) Furthermore, since V1 is the supply rate V at time t3, substituting TM2 for t in equation (6) above, it can be expressed as equation (10). V1 = (1 / 2) × j × TM2 2 +VL ····(10) From equation (8) above, TM3 = V1 / α, so from this equation and equation (10), equation (9) becomes equation (11). L3 = (1 / 2) × α × ((―(1 / 2) × j × TM2 2 + VL) / α) 2 ····(11) Furthermore, the pre-production length L0 can be expressed by the following equation (12) using the reference remaining length Lth. L0 = Lth - L1 - L2 - L3 ····(12) Also, for example, the control device 45 has data for determining the jerk j from the maximum deceleration α, and determines the jerk j from the maximum deceleration α based on this data. Specifically, the arithmetic expression for determining the jerk j and the data of the combination of the maximum deceleration α and the jerk j are stored in the memory of the control device 45.

[0054] (Regarding splicing process) Next, the splicing process executed by the control device 45 in splicing the base paper 28 will be described. FIG. 6 shows a flowchart of the splicing process. Here, for example, the management device 50 calculates and manages the length of the base paper 28 used in production for each order of the cardboard sheet. The management device 50 calculates the length of the base paper 28 used in production based on, for example, the number of cardboard sheets to be produced, the length of one cardboard sheet, etc. Also, the management device 50 acquires the encoder information of the second encoder 79 of the inlet roll 56, and based on the acquired encoder information, detects the length of the base paper 28 fed out from the splicing device 12 to the subsequent process devices. The management device 50 can calculate the length up to the splicing position PS, that is, the remaining length that needs to be fed out up to the splicing position PS (hereinafter sometimes referred to as the remaining length), based on the length of the fed-out base paper 28 and the length of the base paper 28 planned to be used in production.

[0055] The operator prepares the new base paper 28B at any time during production using the old base paper 28A. Generally, the operator prepares the new base paper 28B immediately after the previous splicing is completed, by removing the old base paper 28A (the old base paper from the previous splicing) from the chucking arm 22 of the base paper holder 11 and placing the new base paper 28B on the chucking arm 22. Once the operator has completed tasks such as mounting the new base paper 28B to the head unit 54B, they operate the first operation unit 40 to input that the preparation for execution is complete. Upon receiving the input, the control device 45 moves the head unit 54B to the splicing position and notifies the management device 50 that the preparation of the new base paper 28B is complete. The control device 45 continues to discharge the old base paper 28A while waiting for a paper splicing command from the management device 50. When the control device 45 reaches this state, it starts the process shown in Figure 6. The control device 45 executes the process shown in Figure 6, thereby stopping the supply of the old base paper 28A and starting the supply of the new base paper 28B after splicing. The management device 50 and the splicing device 12 may also execute a process to notify the operator of the timing to load the new base paper 28B into the head unit 54B.

[0056] Furthermore, the conditions for starting the process in Figure 6 are not limited to the condition for detecting that the preparation for execution is complete. For example, the control device 45 may start the process in Figure 6 for the next splice upon detecting the completion of the splicing of the previous base paper 28. In other words, the control device 45 may start the process in Figure 6 and determine whether the paper splice command has been received, regardless of whether the operator is ready to execute.

[0057] When the control device 45 starts the process shown in Figure 6, in step 1 (hereinafter simply referred to as S), it determines whether or not it has received a paper splice command from the control device 50. After the control device 50 receives notification from the control device 45 of the splice device 12 that the preparation of the new base paper 28B is complete, it sends a paper splice command to the splice device 12, for example, when the remaining length reaches the standard remaining length Lth. The standard remaining length Lth is, for example, 20m. The standard remaining length Lth is, for example, a length that allows for some margin to stop the base paper roll 27A when the old base paper 28A is supplied at the maximum possible supply speed and then decelerated at the maximum possible deceleration α. ​​The maximum speed is the maximum speed at which the base paper 28 can be supplied by the acceleration / deceleration roll 55. The maximum possible deceleration α is the maximum value that can be set in the maximum deceleration column 93 of Figure 5, and is the maximum value that can be set as the maximum deceleration α of the acceleration / deceleration roll 55. Therefore, the standard remaining length Lth is set to a value that is slightly more generous than the remaining length required for stopping the base paper 28 when deceleration control is performed under the most stringent conditions.

[0058] Furthermore, the control device 50 may manage the timing of sending paper splice commands not by remaining length, but by the number of sheets produced or by production time. For example, the control device 50 may notify the splice device 12 of a paper splice command when the number of corrugated cardboard sheets produced reaches a predetermined number less than the number of pre-set orders. Alternatively, the control device 50 may notify the splice device 12 of a paper splice command when it reaches a predetermined time before the expected end time of production.

[0059] The control device 45 makes a negative judgment in S1 (S1: NO) and repeatedly executes the judgment process of S1 until it receives a paper splice command from the management device 50. When the control device 45 receives a paper splice command (S1: YES), it calculates the length ΔL of the old base paper 28A that was fed (supplied) from the splice device 12 to the next process device after receiving the paper splice command. The control device 45 calculates the length ΔL based on the encoder information of the second encoder 79 of the inlet roll 56. The control device 45 also detects the supply speed VL at the time S2 is executed based on the encoder information of the second encoder 79. In S2, the control device 45 calculates the first to third lengths L1 to L3 using the detected supply speed VL and the above-described equations (1), (2), and (11).

[0060] When the control device 45 executes S2, it determines whether the sum of the lengths calculated in S2 (ΔL+L1+L2+L3) equals the reference remaining length Lth (S3). If the sum is not the reference remaining length Lth (S3:NO), the control device 45 performs the calculation again in S2 and makes the decision in S3 based on the calculation result. If the control device 45 determines that the sum is the reference remaining length Lth (S3:YES), it executes S5 and starts deceleration control from time t1 as shown in Figure 5.

[0061] Therefore, after the control device 45 starts calculating the length ΔL etc. at time t0 in Figure 5, the old base paper 28A is fed out and the length ΔL increases, and the point in time when the total value (ΔL + L1 + L2 + L3) reaches the reference remaining length Lth is determined as the start time of deceleration control (time t1). As a result, by feeding out the sum of the first to third lengths L1 to L3 (=L1 + L2 + L3) from time t1, the splice position PS can be stopped at the splice head 54.

[0062] Furthermore, the control device 45 does not need to detect the supply speed VL every time in S2. For example, the control device 45 may use the supply speed V at time t0 when it receives the paper splicing command as the supply speed VL (fixed value). In this case, the control device 45 does not need to recalculate each length in S2 every time it makes a negative judgment in S3 (S3: NO).

[0063] In S5, the control device 45 performs deceleration control from time t1 onwards as shown in Figure 5 above. As has already been explained, a detailed explanation will be omitted, but in elapsed time TM1, the control device 45 performs brake control to eliminate the slack in the old base paper 28A, and then in elapsed time TM2, the acceleration / deceleration roll 55 decelerates until its deceleration A reaches the maximum deceleration α. ​​In elapsed time TM3, the acceleration / deceleration roll 55 decelerates until its deceleration A reaches the maximum deceleration α and it comes to a stop. This allows the splice head 54 to be stopped with high precision at the splice position PS.

[0064] After the supply speed V becomes zero, the control device 45 performs the splicing process using the splice head 54 (S6, from time t4 to t5 in Figure 5). Once the splicing process is complete, the control device 45 controls the motor 77 to accelerate the new base paper 28B using the acceleration / deceleration roll 55 (S7, from time t5 in Figure 5). While supplying the new base paper 28B, the control device 45 also controls the dancer roll 67 to return to its operating position P1 and keep it there. For example, the control device 45 adjusts the braking force from the brake mechanism 23 to the optimal braking force that keeps the dancer roll 67 at its operating position P1, and accelerates the new base paper 28B to a speed slightly faster than the target supply speed at which the dancer roll 67 would remain at its operating position P1, thereby returning the dancer roll 67, which had moved toward the paper-feeding side, to its operating position P1. The optimal braking force for the dancer roll 67 to remain in the operating position P1, as used here, is the braking force set to prevent the new paper 28B from tearing or becoming loose, while also ensuring that the dancer roll remains in the operating position P1. The control device 45 may reduce or eliminate the braking force of the braking mechanism 23 when moving the dancer roll 67 toward the paper feed side. The control device 45 may also increase the braking force as the dancer roll 67 reaches the operating position P1.

[0065] Then, as the dancer roll 67 returns to the operating position P1, the control device 45 decelerates the acceleration / deceleration roll 55 over a predetermined time to achieve the target supply speed of the new paper 28B. The control device 45 controls the brake mechanism 23 to keep the dancer roll 67 in the operating position P1 and supplies the new paper 28B to the downstream equipment. The control device 45 then completes the process shown in Figure 6. In this way, the control device 45 can shorten the deceleration control time of the acceleration / deceleration roll 55 using the maximum deceleration α and elapsed time TM2 set by the operator.

[0066] Furthermore, the control device 45 stores the supply speed V and time t during the splicing of the base paper 28 performed in the process shown in Figure 6, and the next time the graph display screen 91 is displayed, it displays graph 92 based on the stored supply speed V and time t. The control device 45 may also store the supply speed V, etc., from multiple past splicing operations as a history, and accept the selection of data from the stored history to be displayed as graph 92 on the graph display screen 91. Also, the display contents of the graph display screen 91 shown in Figure 5 are just an example. The control device 45 may display only the waveform of graph 92 on the graph display screen 91, or it may also display the supply speed VL, elapsed time TM0 to TM3, etc. on the graph display screen 91.

[0067] Incidentally, in the above embodiment, the first operating unit 40 is an example of a user interface. The second encoder 79 is an example of an encoder. The acceleration / deceleration roll 55 is an example of a deceleration roll. The supply speed V is an example of a speed. The elapsed time TM2 is an example of a deceleration increase time. The length ΔL is an example of a supply length. The remaining length is an example of a reached length. The first to third lengths L1 to L3 are examples of deceleration lengths.

[0068] As described above, the embodiments provide the following effects. (1) The acceleration / deceleration roll 55 of this embodiment feeds out the old base paper 28A from the base paper roll 27A provided on the base paper holder 11 and reduces the supply speed V at which the old base paper 28A is fed out. The dancer mechanism 51 feeds out the old base paper 28A fed out from the acceleration / deceleration roll 55 to the equipment for the next process while storing it, and changes the amount of old base paper 28A stored according to the tension of the old base paper 28A. The control device 45 controls the deceleration A of the old base paper 28A by the brake mechanism 23 which is provided on the base paper holder 11 to decelerate the rotation of the base paper roll 27 and by the acceleration / deceleration roll 55. In addition, the control device 45 performs deceleration control of the old base paper 28A by applying brakes with the brake mechanism 23 and decelerating with the acceleration / deceleration roll 55 in order to perform splicing of the old base paper 28A and the new base paper 28B (S5 in Figure 6). The control device 45 performs deceleration control of the acceleration / deceleration roll 55 based on the supply speed VL of the old paper 28A fed out from the acceleration / deceleration roll 55, the maximum deceleration α at which the supply speed VL of the old paper 28A is reduced by the acceleration / deceleration roll 55 during deceleration control, and the elapsed time TM2 from the start of deceleration by the acceleration / deceleration roll 55 until the deceleration A reaches the maximum deceleration α (see Figure 5).

[0069] According to this, the control device 45 performs deceleration control of the acceleration / deceleration roll 55 based on the supply speed VL, the maximum deceleration α, and the elapsed time TM2. The supply speed VL is changed according to the capacity of the production equipment, the required production speed, the type of base paper roll 27, etc. The supply speed VL is also changed according to the amount of material remaining in the dancer mechanism 51 during production. Here, as in the prior art documents, if deceleration is performed with the same torque limit despite the fluctuation of the supply speed VL, the deceleration A may not reach the maximum deceleration α due to the torque limit, which may delay the stopping timing (time t4) of the base paper 28. In contrast, the control device 45 of this embodiment performs deceleration control of the acceleration / deceleration roll 55 according to the supply speed VL, maximum deceleration α, and elapsed time TM2 of the old base paper 28A, thereby enabling the deceleration by the acceleration / deceleration roll 55 to start at an appropriate timing. Furthermore, by setting a shorter time as the elapsed time TM2, the period during which deceleration is performed can be shortened, and the old base paper 28A can be stopped more quickly. This allows the old base paper 28A to be stopped by using both the brake control of the base paper holder 11 and the deceleration control of the acceleration / deceleration roll 55, and even if the supply speed VL fluctuates, the old base paper 28A can be stopped quickly in accordance with the fluctuating supply speed VL. In addition, by shortening the deceleration period (TM2 + TM3), the time during which the amount stored in the dancer mechanism 51 decreases can be shortened. The amount of decrease in the amount stored from the start of deceleration by the acceleration / deceleration roll 55 until the base paper roll 27A of the old base paper 28A stops can be suppressed.

[0070] (2) In addition, in deceleration control, the control device 45 controls the brake mechanism 23 to apply a brake torque to the paper roll 27A of the old paper 28A before starting deceleration by the acceleration / deceleration roll 55, and controls the rotational speed of the acceleration / deceleration roll 55 so that the supply speed VL of the old paper 28A is maintained at the current speed, thereby performing control to increase the tension of the old paper 28A between the paper roll 27A and the acceleration / deceleration roll 55 (elapsed time TM1).

[0071] According to this, before deceleration by the acceleration / deceleration roll 55 begins, a braking torque is applied to the base paper roll 27A by the braking mechanism 23, and the acceleration / deceleration roll 55 is controlled to maintain the supply speed V at the current speed (supply speed VL). This increases the tension of the old base paper 28A between the base paper roll 27A and the acceleration / deceleration roll 55, and reduces the slack of the old base paper 28A. By eliminating the slack of the old base paper 28A relative to the acceleration / deceleration roll 55 and increasing the frictional force between the old base paper 28A and the acceleration / deceleration roll 55, the old base paper 28A can be decelerated by the acceleration / deceleration roll 55 without slipping.

[0072] (3) The inlet roll 56 is positioned downstream of the acceleration / deceleration roll 55 and upstream of the dancer mechanism 51 in the transport direction of the old paper 28A. The second encoder 79 outputs encoder information (an example of rotation position information as specified herein) corresponding to the rotation position of the inlet roll 56. The inlet roll 56 is rotatable in response to external forces, and the old paper 28A that is carried from the acceleration / deceleration roll 55 toward the dancer mechanism 51 is placed over it, and it rotates in accordance with the transport of the old paper 28A. The control device 45 detects the supply speed VL of the old paper 28A unwound from the acceleration / deceleration roll 55 based on the encoder information from the second encoder 79.

[0073] In devices that rotate according to the torque of a drive source, such as the acceleration / deceleration roll 55, depending on the tension of the old paper 28A, there is a risk that the acceleration / deceleration roll 55 may slip relative to the old paper 28A, and the rotational speed of the acceleration / deceleration roll 55 and the supply speed VL of the old paper 28A may not match. In contrast, the inlet roll 56 is not equipped with a drive source such as a motor and can rotate freely in response to external forces. The control device 45 acquires encoder information from the second encoder 79 for the inlet roll 56 onto which the old paper 28A moving from the acceleration / deceleration roll 55 toward the dancer mechanism 51 is applied, and detects the supply speed VL from the acquired encoder information. This allows for accurate detection of the supply speed VL of the old paper 28A, and enables more accurate determination of the timing of the start of deceleration.

[0074] (4) The splice head 54 is a device that splices the new paper 28B onto the old paper 28A. In deceleration control, the control device 45 executes control to stop the splice position PS on the old paper 28A at the splice head 54. Before executing deceleration control, the control device 45 determines the timing to start deceleration by the acceleration / deceleration roll 55 in deceleration control, based on the supply speed VL, the maximum deceleration α, the elapsed time TM2, and the length reached (remaining length) until the splice position PS reaches the splice head 54.

[0075] When stopping the feeding of the old base paper 28A, if the desired splice position PS on the old base paper 28A can be stopped at the splice head 54, the length of the base paper 28 used in production can be accurately controlled. The control device 45 determines the timing of starting deceleration by considering the supply speed VL, the maximum deceleration α, the elapsed time TM2, and the length reached (remaining length) until the splice position PS reaches the splice head 54. This allows the old base paper 28A to be stopped quickly by using both the brake control of the base paper holder 11 and the deceleration control of the acceleration / deceleration roll 55, and the desired splice position PS to be stopped at the splice head 54. Furthermore, by checking the operation of the splicing device 12 while changing the maximum deceleration α, the operator can set a larger value for the maximum deceleration α while ensuring that the splice position PS stops at the splice head 54.

[0076] (5) The communication interface 48 can also communicate with the control device 50 of the production line (corrugator line) which includes the splice device 12. After production using the old base paper 28A is started on the corrugator line, the control device 50 sets the trailing end of the old base paper 28A when a predetermined production amount has been produced as the splice position PS, and sends a paper splice command to the splice device 12 instructing it to start deceleration control when the remaining length of the old base paper 28A from the splice position PS becomes a predetermined reference remaining length Lth. When the control device 45 receives the paper splice command from the control device 50 via the communication interface 48 (S1:YES), it detects the supply length (length ΔL) of the old base paper 28A that has been fed out since the paper splice command was received. The control device 45 calculates the expected deceleration length (L1+L2+L3) from the time the deceleration control is started (time t1) until the rotation of the base paper roll 27A stops, based on the supply speed VL, the maximum deceleration α, and the elapsed time TM2 (S2). The control device 45 determines the timing to start deceleration control when the sum of the detected supply length (length ΔL) and the calculated deceleration length (L1+L2+L3) matches the reference remaining length Lth (S3:YES).

[0077] According to this, the control device 45 detects the supply length (length ΔL) and the deceleration length (L1+L2+L3), and determines the timing when their sum becomes the reference remaining length Lth as the start timing for deceleration control. The splice position PS can be stopped at the position where the desired reference remaining length Lth has been unwound from the base paper roll 27A. The splice position PS can be stopped with high precision at the same working position.

[0078] (6) The control device 45 also displays a graph 92 of the supply speed VL of the old base paper 28A unfurled from the acceleration / deceleration roll 55 on the graph display screen 91, and accepts changes to the maximum deceleration α and elapsed time TM2 via the graph display screen 91 (see Figure 5).

[0079] According to this, the operator can change the maximum deceleration α and elapsed time TM2 via the graph display screen 91 (first operation unit 40), and can check the change in the supply speed VL after the change using the graph 92. By checking the deceleration of the supply speed VL and the warping and slipping of the old base paper 28A, the operator can set more appropriate values ​​for the elapsed time TM2 and maximum deceleration α. ​​As a result, slipping of the old base paper 28A can be prevented, and a shorter elapsed time TM2 and a larger maximum deceleration α can be set, allowing the base paper roll 27A to be stopped more quickly.

[0080] It should be noted that the present invention is not limited to the embodiments described above, and various improvements and modifications are possible without departing from the spirit of the invention. For example, the configuration of the splicing device 12 in the above embodiment is just one example. The splicing device 12 may not have a first operating unit 40. The splicing device 12 may also have an external interface 47 that can be connected to a second operating unit 41 provided on the base paper holder 11, and may also serve as the user interface for the base paper holder 11. Furthermore, the positions of the acceleration / deceleration roll 55, the inlet roll 56, and other rolls are just examples. The splicing device 12 is configured to include an acceleration / deceleration roll 55 capable of both accelerating and decelerating as the reduction roll in this specification, but is not limited to this configuration. The reduction roll in this specification may be a reduction roll capable only of decelerating the base paper 28.

[0081] Furthermore, the control device 45 does not have to perform brake control for the elapsed time TM1 before deceleration for the elapsed time TM2. The control device 45 does not have to perform brake control for the elapsed time TM1 at all, and may start brake control simultaneously with deceleration. Furthermore, the control device 45 may detect the supply speed V by a method other than the second encoder 79 of the inlet roll 56. For example, the control device 45 may be configured to detect the supply speed V based on encoder information from an encoder attached to the acceleration / deceleration roll 55. In the above embodiment, the timing of splicing, paper splicing commands, reference remaining length Lth, etc., were managed by the corrugator line management device 50, but this is not limited to this. For example, the splice device 12 may manage the timing of splicing and the reference remaining length Lth, and perform deceleration control. The splice device 12 may be configured not to accept changes to set values ​​such as the maximum deceleration α or the elapsed time TM2. The splice device 12 may be configured not to display the graph 92. Furthermore, the operating position P1 and the maximum storage position P2 may be the same. That is, the control device 45 may, during normal operation, control the dancer roll 67 to move it as far as possible towards the paper storage side (left side in Figure 2). [Explanation of Symbols]

[0082] 10 Paper feeder, 11 Paper holder, 12 Splicing device, 23 Brake mechanism, 27, 27A, 27B Paper rolls, 28A Old paper, 28B New paper, 40 First operating unit (user interface), 45 Control device, 48 Communication interface, 50 Management device, 51 Dancer mechanism, 54 Splice head, 55 Acceleration / deceleration roll (deceleration roll), 56 Inlet roll, 79 Second encoder (encoder), 92 Graph, A Deceleration, L1 First length (deceleration length), L2 Second length (deceleration length), L3 Third length (deceleration length), ΔL Length (feed length), Lth Reference remaining length, PS Splicing position, T1, T2 Tension, TM2 Elapsed time (deceleration increase time), V, VL, V1 Feeding speed (speed), α Maximum deceleration.

Claims

1. A reduction roll is provided to feed out old paper from a paper roll installed on the paper holder, and to reduce the speed at which the old paper is fed out. A dancer mechanism that stores the old paper unwound from the reduction roll and unwounds it to a subsequent process device, and changes the amount of the old paper stored according to the tension of the old paper, A braking mechanism provided on the base paper holder for reducing the rotation of the base paper roll, and a control device for controlling the deceleration of the old base paper by the deceleration roll, Equipped with, The control device is In order to perform the splicing of the old base paper with a new base paper that is different from the old base paper, the braking mechanism applies the brakes and the reduction roll applies the deceleration, and the deceleration control of the old base paper is performed. A splice device that performs deceleration control of the reduction roll based on the supply speed of the old base paper unfurled from the reduction roll, the maximum deceleration rate at which the supply speed of the old base paper is reduced by the reduction roll in the deceleration control, and the deceleration increase time from the start of deceleration by the reduction roll until the deceleration reaches the maximum deceleration rate.

2. The control device is The splicing device according to claim 1, wherein, in the deceleration control, before deceleration by the deceleration roll is started, the brake mechanism is controlled to apply a brake torque to the paper roll of the old paper, and the rotational speed of the deceleration roll is controlled so that the supply speed of the old paper is maintained at the current speed, thereby performing control to increase the tension of the old paper between the paper roll and the deceleration roll.

3. An inlet roll is provided in the transport direction of the old base paper, located downstream of the reduction roll and upstream of the dancer mechanism, An encoder that outputs rotational position information corresponding to the rotational position of the aforementioned inlet roll, Furthermore, The aforementioned entrance roll is It is provided so as to be rotatable in response to an external force, and the old base paper is placed on it from the reduction roll toward the dancer mechanism, and rotates in accordance with the transport of the old base paper. The control device is The splice device according to claim 1 or claim 2, wherein the supply speed of the old base paper unwound from the reduction roll is detected based on the rotational position information of the encoder.

4. The system further includes a splice head for joining the new paper to the old paper, The control device is In the aforementioned deceleration control, control is performed to stop the splice head at the splice position in the old base paper. The splicing device according to claim 1 or 2, wherein, before executing the deceleration control, the timing for initiating deceleration by the deceleration roll is determined based on the supply speed, the maximum deceleration, and the deceleration increase time, as well as the length reached until the splice position reaches the splice head.

5. The system further includes a communication interface that can communicate with a control device for the production line, including the splice device, The aforementioned control device is After production using the old base paper is started on the production line, the trailing end of the old base paper after a predetermined production volume has been produced is set as the splicing position, and a paper splicing command is sent to the splicing device to instruct the start of deceleration control when the remaining length of the old base paper from the splicing position reaches a predetermined standard remaining length. The control device is When the paper splicing command is obtained from the management device via the communication interface, the supply length of the old base paper that has been unfurled since the paper splicing command was obtained is detected, Based on the supply speed, the maximum deceleration, and the deceleration increase time, the expected deceleration length from the start of the deceleration control until the rotation of the base paper roll stops is calculated. The splice device according to claim 1 or 2, wherein the timing at which the sum of the detected supply length and the calculated deceleration length matches the reference remaining length is determined as the timing to start the deceleration control.

6. The user interface is further enhanced, The control device is The splicing device according to claim 1 or 2, wherein a graph of the supply speed of the old base paper unfurled from the reduction roll is displayed on the user interface, and changes to the maximum deceleration and the deceleration increase time are accepted via the user interface.

7. A splicing device according to claim 1 or claim 2, The aforementioned paper holder, A paper feeder equipped with a base paper supply device.

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