JPWO2019151052A1 - Sheet supply method and sheet supply device - Google Patents

Abstract

The sheet supply method includes a feeding step in which the sheet is supplied to the downstream side at a predetermined transfer speed, the sheet from the first roll is pressed against the outer peripheral surface of the second roll, and the sheet from the first roll is pressed into the second roll. After joining to the sheet, the joint step of cutting the sheet from the first roll at an upstream position of the joint is included. In the joining step, the feeding speed of the sheet from the first roll is smaller than the predetermined feeding speed in the feeding step, and is different from the feeding speed of the sheet from the feeding unit in the joining step. The excess or deficiency of the sheet caused by the speed difference from the supply speed is collected, stored, or discharged.

Description

The present invention relates to a sheet supply method and a sheet supply device.

Conventionally, as disclosed in Patent Documents 1 and 2, a sheet supply device that sequentially feeds out a sheet from a pair of rolls around which the sheet is wound and supplies the sheet to a downstream line, and is supplying from one roll. It is known that the sheet is provided with a connecting mechanism for connecting the sheet of the other roll that is waiting to the sheet. According to this device, when the remaining amount of the sheet of the roll being supplied is low, the sheet of the waiting roll is brought into contact with the sheet unwound from the roll being supplied, so that the sheet is continuously connected to the downstream line. Can be supplied as a target.

The sheet supply device disclosed in Patent Documents 1 and 2 has a support shaft that supports a pair of rolls, and a pressing roll that presses a sheet unwound from one of the rolls being supplied against the outer peripheral surface of the other roll that is waiting. It is provided with a joining mechanism having the above and a supply unit for supplying a sheet to a line on the downstream side. According to this device, when the remaining amount of sheets in one roll is low, the sheet being supplied is pressed against the outer peripheral surface of the other roll in standby, and the sheets are adhered to each other by the adhesive member provided on the outer peripheral surface. By doing so, the sheet can be joined.

In the sheet supply device disclosed in Patent Documents 1 and 2, the support shafts of both rolls are rotated so that the sheet is fed out at the same speed as the sheet is supplied to the downstream line, and the sheet is transferred to the downstream line. The joining operation is performed while supplying. Further, the speed of the outer peripheral surface of the roll during the joining operation and the standby is set to the same speed as the feeding speed of the sheet being supplied.

Normally, the sheet transport speed is set to a high speed in consideration of manufacturing efficiency in the line and the like. For this reason, in the joining operation by the conventional sheet supply device, it is necessary to press the sheet conveyed at high speed to the position where the adhesive member is provided on the outer peripheral surface of the roll on the standby side that rotates at high speed, and the timing adjustment is performed. There is a problem that it is difficult and high accuracy is required to perform the joining operation.

Further, for example, when changing the specifications of the roll (sheet), the downstream line may be stopped to stop the supply of the sheet to the line. In the conventional sheet feeding device, when the adhesive member provided on the outer peripheral surface of the waiting roll reaches the position where the sheet being supplied is pressed, the sheets are adhered to each other through the adhesive member. Therefore, in the state where the supply of the sheet is stopped, the adhesive member cannot be moved to the pressing position, and the joining operation cannot be performed. For this reason, the sheet of the new roll set in the sheet supply device as a standby roll requires the operator to guide the tip of the sheet to the downstream line via a predetermined pass line, and the work must be performed. Has the problem of being complicated.

Japanese Unexamined Patent Publication No. 2003-118895 International Publication No. 2017/149610

An object of the present invention is that the sheet joining operation can be performed even when the sheet supply to the downstream line is stopped, and the sheet supply to the line is easily and accurately performed even at a high speed. It is an object of the present invention to provide a sheet supply method and a sheet supply device capable of performing a joining operation at various timings.

In the sheet supply method according to one aspect of the present invention, the first support shaft for rotatably supporting the first roll around which the sheet is wound and the second roll around which the sheet is wound are rotated at the center position. A second support shaft that can support the second roll, a joining mechanism for bringing the sheet of the second roll into contact with the sheet of the first roll, and a sheet unwound from the first roll or the second roll are supplied to the downstream side. Using a sheet supply device provided with a supply unit, a storage mechanism arranged between the first support shaft and the supply unit, and a storage mechanism for taking up the sheets on the upstream side and storing a predetermined amount of sheets. This is a method of sequentially feeding out and supplying sheets from the first roll and the second roll. In this sheet supply method, the feeding step for controlling the first support shaft and the first roll so that the sheet is supplied from the supply unit to the downstream side at a predetermined transfer speed in the downstream device. The first support shaft is pressed against the outer peripheral surface of the second roll so as to press the middle portion of the sheet unwound from the first roll in a state where the feeding speed of the sheet and the speed of the outer peripheral surface of the second roll match. , The second support shaft and the joining mechanism are controlled, the sheet from the first roll is joined to the sheet of the second roll, and then the sheet from the first roll is cut at an upstream position of the joining portion. Including splicing steps. In the joining step, the feeding speed of the sheet from the first roll is smaller than the predetermined transport speed in the feeding step and different from the feeding speed of the sheet from the feeding section in the joining step. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. , Or spit it out.

The sheet supply device according to another aspect of the present invention is a device that sequentially feeds and supplies sheets from the first roll and the second roll around which the sheets are wound. The sheet feeding device includes a first support shaft that rotatably supports the first roll at its center position, a second support shaft that rotatably supports the second roll at its center position, and the second roll. A joining mechanism for joining the sheet of the first roll to the sheet of the first roll, the joining mechanism including a cutter for cutting the sheet unwound from the first roll on the upstream side of the joining portion after the joining operation, and the above. In the supply unit that supplies the sheet unwound from the first roll or the second roll to the downstream side of the sheet supply device, and in the steady state of supplying the sheet from the sheet supply device to the downstream side, in the device on the downstream side. The first support shaft is controlled so that the sheet is fed downstream from the supply unit at a predetermined transfer speed, and the feed rate of the sheet from the first roll and the feed rate of the second roll at the time of joining the sheets The first support shaft, the second support shaft, and the joining mechanism are controlled so as to press the middle portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll in a state where the speed of the outer peripheral surface is matched. The controller is provided between the first support shaft and the supply unit, and a storage mechanism for taking up the sheets on the upstream side and storing a predetermined amount of sheets. In the controller, the feed rate of the sheet from the first roll at the time of sheet connection is smaller than the predetermined transfer speed and is different from the sheet supply speed from the supply unit at the time of sheet connection. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. Acts to spit or spit.

According to the present invention, the joining operation can be easily performed at an accurate timing, and the sheet joining operation can be performed even when the supply of the sheet from the supply unit to the downstream side is stopped. A sheet supply method and a sheet supply device can be provided.

It is a front partial sectional view which shows typically the structure of the sheet supply apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the electrical structure of the controller which controls the operation of the said sheet feeding device. It is a flowchart which shows the procedure of the sheet supply method which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the sheet supply method which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the state of pressing the middle part of the sheet of the 1st roll against the outer peripheral surface of the 2nd roll in the said sheet supply method. It is a schematic diagram which shows the state that the sheet of the 1st roll was cut in the said sheet supply method. It is a schematic diagram which shows the state which the sheet of the 1st roll was wound up in the said sheet supply method. It is a front partial sectional view which shows typically the structure of the sheet feeding apparatus which concerns on Embodiment 2 of this invention.

Hereinafter, the sheet supply device and the sheet supply method according to the embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the configuration of the sheet supply device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a partial front sectional view of the sheet supply device 1. FIG. 2 is a block diagram showing an electrical configuration of a controller 80 that controls the operation of the seat supply device 1. Hereinafter, the left-right direction in FIG. 1 will be described as the “X direction”, the vertical direction in FIG. 1 will be referred to as the “Z direction”, and the directions orthogonal to the X direction and the Z direction (the paper depth direction in FIG. 1) will be described as the “Y direction”.

The sheet supply device 1 is a device for sequentially feeding and supplying the sheet S from the first roll R1 and the second roll R2 around which the sheet S is wound. As shown in FIG. 1, the sheet supply device 1 is attached to the base 50, the support mechanism 10 attached to the base 50 and supporting the first and second rolls R1 and R2, and the base 50. The joining mechanism 20 for connecting the sheet S of the two rolls R2 to the sheet S unwound from the first roll R1 and the sheet S unwound from the first roll R1 or the second roll R2 are on the downstream side of the sheet supply device 1. A drive unit (supply unit) 70 for supplying to the drive unit 70, a storage mechanism 30 for storing a predetermined amount of seat S on the upstream side of the drive unit 70, and a controller 80 for controlling the support mechanism 10, the joining mechanism 20, and the drive unit 70. And have.

In FIG. 1, the first roll R1 is in the supply state of the sheet S, and the second roll R2 is in the standby state in which the sheet S is not supplied. The sheet supply device 1 connects the sheet S of the second roll R2 (standby roll) to the sheet S of the first roll R1 (supply side roll) by the joining mechanism 20, and the first roll is upstream of the contacted position. By cutting the sheet S unwound from the roll R1, the sheet S can be continuously conveyed to the line on the downstream side of the sheet supply device 1.

As shown in FIG. 1, an adhesive member H (for example, double-sided tape or the like) for adhering the sheet S of the second roll R2 to the sheet S of the first roll R1 is provided on the outer peripheral surface of the second roll R2. ing. Hereinafter, each component of the sheet supply device 1 will be described.

The base 50 has a mounting plate 51 mounted on a predetermined installation surface, a plurality of columns 52 extending in the Z direction, and a beam 53 extending in the X direction. As shown in FIG. 1, the columns 52 are erected on the mounting plate 51 so as to face each other in the X direction. The upper ends of the columns 52 are fixed to both ends of the beam 53.

The support mechanism 10 is attached to the base 50 so as to be rotatable around a rotation shaft 13 extending in the Y direction. Specifically, the support mechanism 10 is provided on the rotating shaft 13, a rotating member 17 that can rotate around the rotating shaft 13, and the rotating member 17, and the first and second rolls R1 and R2 are positioned at their centers. It has a first support shaft 11 and a second support shaft 12 that are rotatably supported by the above.

The rotating member 17 extends in a direction orthogonal to the rotating shaft 13. The first support shaft 11 is provided at one end of the rotating shaft 13 of the rotating member 17, and the second support shaft 12 is provided at the other end of the rotating shaft 13 of the rotating member 17. Further, the first and second support shafts 11 and 12 extend from the rotating member 17 to one side (front side of the paper surface) in the Y direction so as to be cantilevered by the rotating member 17. Therefore, the first and second rolls R1 and R2 are mounted on the support mechanism 10 by inserting the free ends of the first and second support shafts 11 and 12, respectively, into the centers of the first and second rolls R1 and R2. can do.

The support mechanism 10 includes a rotating member drive source 18 (FIG. 2) that generates a driving force that rotates the rotating member 17, and a shaft drive that generates a driving force that rotates the first and second support shafts 11 and 12 around the shaft. It further has a source 19 (FIG. 2). The rotating member drive source 18 and the shaft drive source 19 are composed of, for example, a motor, and the rotational drive force of the motor is applied to the rotary shaft 13 and the first and second support shafts via a power transmission mechanism such as a belt or a pulley. It is transmitted to 11 and 12, respectively. As a result, the rotating shaft 13 and the first and second support shafts 11 and 12 can be rotated around the shaft at a predetermined speed.

Although not shown, the rotating member 17 can take an arbitrary posture during the steady state in which the sheet S is conveyed to the downstream line. For example, the rotating member 17 is arranged in a posture in which the supply side roll (first roll R1) is on the upper side in the Z direction of the standby side roll (second roll R2) and is located closer to the joining mechanism 20. .. Then, when the sheets S of both rolls are brought into contact with each other, the rotating member 17 rotates about the rotation shaft 13 (splice position) so that the waiting second roll R2 approaches the joining mechanism 20 as shown in FIG. ).

The joining mechanism 20 is delivered from a joining unit 23 that moves in the X direction along the beam 53, a unit drive source 27 (FIG. 2) that generates a driving force that moves the joining unit 23, and a first roll R1. A pressing roller 24 for pressing an intermediate portion of the sheet S against the outer peripheral surface of the second roll R2, a cutter 25 for cutting the sheet S unwound from the first roll R1, and an outer circumference from the center of the second roll R2. It has an outer diameter detector 21 that detects the distance (radius) to the surface, and an adhesive member detector 22 that detects the position of the adhesive member H arranged on the outer peripheral surface of the second roll R2 in the circumferential direction.

The unit drive source 27 is composed of, for example, a servomotor, and the driving force thereof is transmitted to the joint unit 23 via a power transmission mechanism such as a belt or a pulley. As a result, the joining unit 23 can be moved forward so as to approach the second roll R2 at the splice position, or can be moved backward so as to move away from the second roll R2.

The pressing roller 24 has a shaft extending in the Y direction and is attached to the joining unit 23. Therefore, the pressing roller 24 can be moved forward or backward together with the joining unit 23 in a posture parallel to the axis of the second roll R2. As a result, the intermediate portion of the sheet S unwound from the first roll R1 is pressed against the outer peripheral surface of the second roll R2 by the pressing roller 24, and both sheets S are adhered by the adhesive member H, whereby the sheet S is joined. It can be performed.

The cutter 25 has a cutter blade 25B that can rotate about an axis extending in the Y direction, and a cutter drive source 25A (FIG. 2) that generates a driving force for rotating the cutter blade 25B. The cutter 25 is also attached to the joining unit 23, and can be moved forward or backward together with the joining unit 23. The cutter 25 can cut the sheet S unwound from the first roll R1 after the joining operation on the upstream side of the joint portion.

The outer diameter detector 21 is composed of, for example, a laser sensor. As shown in FIG. 1, the outer diameter detector 21 is fixed above the joint unit 23 by a bracket 26 erected on the beam 53.

The adhesive member detector 22 is composed of, for example, a color sensor (line sensor or area sensor). The adhesive member detector 22 is also attached to the joint unit 23, and can be moved forward or backward together with the joint unit 23.

The drive unit 70 is arranged at the most downstream side in the sheet transport direction in the sheet supply device 1. The drive unit 70 includes a drive roller 72 whose axis extends in the Y direction so that the seat S can be hung, and a roller drive source 71 (FIG. 2) that generates a driving force for rotating the drive roller 72 around the axis at a predetermined speed. , Have. The roller drive source 71 is composed of, for example, a motor or the like. By adjusting the rotation speed of the drive roller 72 by the output of the roller drive source 71, the transfer speed is adjusted so that the sheet S is supplied at a predetermined transfer speed in the downstream line.

The storage mechanism 30 is arranged between the first support shaft 11 and the drive unit 70 (drive roller 72), takes over the sheet S on the upstream side, and stores a predetermined amount of the sheet S. The storage mechanism 30 also serves as a control mechanism that feedback-controls the transport speed of the sheet S delivered from the first roll R1 via the controller 80 so as to match the transport speed of the sheet S. As shown in FIG. 1, the storage mechanism 30 is arranged between the pair of fixed rolls 31 and 32 and the pair of fixed rolls 31 and 32, and the moving roll 33 that moves according to the tension of the sheet S. Have. The sheet S being conveyed is hung on the fixed rolls 31 and 32 and the moving roll 33, respectively.

When the tension of the sheet S is lower than a predetermined set value, the moving roll 33 moves so that the path length of the sheet S becomes longer, which increases the storage amount of the sheet S. On the other hand, when the tension of the sheet S is higher than the set value, the moving roll 33 moves so that the path length of the sheet S becomes shorter, which reduces the storage amount of the sheet S.

The storage mechanism 30 further includes a position detection sensor 34 (FIG. 2) that detects the position of the moving roll 33. The detection result by the position detection sensor 34 is transmitted to the controller 80, and the controller 80 controls the rotation speed of the first support shaft 11 based on the detection result. That is, the position information of the moving roll 33 can be fed back to the control of the first support shaft 11, whereby the moving roll 33 is placed in the predetermined set position, so that the predetermined transfer speed is obtained. The transport speed of the sheet S fed out from the first roll R1 can be controlled so as to coincide with.

The controller 80 is configured by combining a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like. As shown in FIG. 2, the controller 80 includes a control area 81 that controls each operating unit of the seat supply device 1. The control area 81 includes a rotary member control unit 81A that controls the rotation and stop of the motor constituting the rotary member drive source 18, and a shaft control unit 81B that controls the rotation and stop of the motor that constitutes the shaft drive source 19. The unit control unit 81C that controls the drive and stop of the servomotor that constitutes the unit drive source 27, the cutter control unit 81D that controls the operation of the cutter drive source 25A, and the rotation of the motor that constitutes the roller drive source 71. A roller control unit 81E that controls the stoppage, an outer diameter determination unit 81F, and an adhesive member position determination unit 81G are included. The outer diameter determination unit 81F specifies the radius and the average radius of the second roll R2 at an arbitrary portion based on the detection result by the outer diameter detector 21. The adhesive member position determination unit 81G specifies the position of the adhesive member H on the outer peripheral surface of the second roll R2 in the circumferential direction based on the detection result by the adhesive member detector 22.

The controller 80 executes the following controls in the steady state in which the sheet is conveyed to the downstream side and in the sheet joining state, respectively. First, during steady-state sheet transfer, the controller 80 (axis control unit 81B and roller control unit 81E) sends the sheet S from the drive unit 70 to the downstream side at a predetermined transfer speed on the downstream side line. In addition, the first support shaft 11 and the drive unit 70 are controlled. At this time, the first support shaft 11 is controlled by the feedback from the storage mechanism 30 so that the transfer speed of the sheet S delivered from the first roll R1 becomes the same as the transfer speed of the sheet S by the drive unit 70.

On the other hand, when the sheets are joined, the controller 80 (axis control unit 81B and unit control unit 81C) is in a state where the feed rate of the sheet S from the first roll R1 and the speed of the outer peripheral surface of the second roll R2 are matched. The first support shaft 11, the second support shaft 12, and the joining mechanism 20 are controlled so as to press the intermediate portion of the sheet S drawn out from the first roll R1 against the outer peripheral surface of the second roll R2.

For example, when the product type and size manufactured on the downstream line are changed, it is necessary to change the specifications of the roll (sheet) used as the material, and the above-mentioned second roll R2 is the second roll of the new material. It will be replaced with R2. Then, the above-mentioned joining operation is executed in a state where the downstream line is stopped and the supply of the sheet S to the line is stopped.

Hereinafter, the sheet supply method according to the present embodiment will be described based on the process executed by the controller 80. 3 and 4 are flowcharts showing the procedure of the sheet supply method, which will be described below.

First, in the steady state in which the sheet S is conveyed to the downstream line, the feeding step S10 is executed. In this step, the first support shaft 11 and the drive unit 70 are supplied so that the sheet S unwound from the first roll R1 is supplied from the drive unit 70 to the downstream side at a predetermined transfer speed in the downstream line. Is controlled by the controller 80 (axis control unit 81B, roller control unit 81E). At this time, the rotation speed of the first support shaft 11 is adjusted based on the position of the moving roller 33 of the storage mechanism 30 as described above. Further, during this step, the rotation of the second support shaft 12 is stopped.

Next, when the downstream line is stopped and the sheet S transfer stop operation is performed in the operation unit 90 (FIG. 2) (“YES” in step S20), the controller 80 (axis control unit 81B, roller control unit 81E) ) Stops the operation of the first support shaft 11 and the drive unit 70. As a result, the transfer of the sheet S from the sheet supply device 1 to the downstream line is stopped (step S30). Then, the rotation of the rotating member 17 is controlled by the controller 80 (rotating member control unit 81A) so that the waiting second roll R2, which has been replaced with a new material roll in advance, moves to the splice position (FIG. 1). (Step S40).

Next, the joint preparation step S50 is executed. In this step S50, first, the radius of the second roll R2 in standby is detected by the outer diameter detector 21 (step S51). The information of the detection result is transmitted to the controller 80 (outer diameter determination unit 81F). If the radius of the second roll R2 is known, this step may be omitted.

Next, the unit drive source 27 is controlled by the controller 80 (unit control unit 81C) so that the connecting unit 23 approaches the second roll R2 at the splice position (step S52). At this time, based on the information on the radius of the second roll R2 detected in step S51, the movement amount of the joining unit 23 is increased so that the sheet S of the first roll R1 does not come into contact with the outer peripheral surface of the second roll R2. Be controlled.

Next, the second roll R2 is rotated, and in this state, the position of the adhesive member H on the outer peripheral surface of the second roll R2 in the circumferential direction is detected by the adhesive member detector 22 (step S53). The information of the detection result is transmitted to the controller 80 (adhesive member position determination unit 81G).

Next, based on the above detection result, the second roll R2 is rotated so that the adhesive member H is arranged at a predetermined position, and then the rotation is stopped (step S54). Specifically, as shown in FIG. 5, in the rotation direction of the second roll R2 (arrow in the figure), the upstream side of the pressing position P1 on which the sheet S of the first roll R1 is pressed (for example, 50 mm of the pressing position P1). The second roll R2 is rotated so that the adhesive member H is located on the front side).

Next, the joining step S60 is executed. In this step, the middle portion of the sheet S unwound from the first roll R1 is set in a state where the feed rate of the sheet S from the first roll R1 and the speed of the outer peripheral surface of the second roll R2 are matched by the following procedure. After the first support shaft 11, the second support shaft 12, and the joining mechanism 20 are controlled so as to be pressed against the outer peripheral surface of the second roll R2, the sheet S from the first roll R1 is joined to the sheet S of the second roll R2. The cutter 25 is controlled so as to cut the sheet S from the first roll R1 at an upstream position of the joint. During this step, the supply of the seat S from the drive unit 70 to the downstream side is stopped.

First, the feedback control to the first support shaft 11 based on the detection result by the position detection sensor 34 of the storage mechanism 30 is turned off (step S61). Next, before the joining operation, the rotation of the first support shaft 11 is performed by the controller 80 (axis control) so that the first roll R1 winds up the seat S in advance and the storage amount of the seat S in the storage mechanism 30 is minimized. It is controlled by the unit 81B) (step S62). In other words, the first roll R1 is rewound so that the path length of the sheet S in the storage mechanism 30 is the shortest.

Next, the unit drive source 27 is controlled by the controller 80 (unit control unit 81C) so that the joining unit 23 approaches the second roll R2 further. As a result, as shown in FIG. 5, with the feeding of the sheet S from the first roll R1 and the rotation of the second roll R2 stopped, the intermediate portion of the sheet S of the first roll R1 is moved by the pressing roller 24. The two rolls R2 are pressed against the outer peripheral surface (positions other than the adhesive member H on the outer peripheral surface) with a predetermined torque (step S63).

After that, the first support shaft 11 and the second support shaft 12 are controlled by the controller 80 (axis control unit 81B) so that the rotation of the first roll R1 and the second roll R2 starts while maintaining the pressed state. (Step S64). At this time, the feed rate of the sheet S from the first roll R1 matches the speed of the outer peripheral surface of the second roll R2, and the second roll R2 rotates until the adhesive member H passes through the pressing position P1. The first support shaft 11 and the second support shaft 12 are controlled. As a result, the tip of the sheet S of the second roll R2 is adhered to the middle portion of the sheet S of the first roll R1 via the adhesive member H, and the sheet S of the second roll R2 is adhered to the sheet S of the first roll R1. Can be touched.

In the controller 80 (axis control unit 81B), the feed rate of the sheet S from the first roll R1 in the connection step S60 is smaller than the predetermined transfer speed in the delivery step S10, and the downstream in the connection step S60. The first support shaft 11 is controlled so as to be different from the supply speed (0 m / min) of the seat S from the drive unit 70 that has stopped supplying to the side, for example, 5 m / min.

The sheet S unwound from the first roll R1 in the joining step S60 is taken up by the storage mechanism 30 and stored. The storage mechanism 30 operates so as to increase the path length (the moving roll 33 moves) according to the length of the sheet S unwound from the first roll R1 during the joining step S60. Here, by minimizing the storage amount of the sheet S of the storage mechanism 30 in advance in step S62, the sheet S unwound from the first roll R1 can be reliably stored in the joining step S60. As described above, the storage mechanism 30 causes the speed difference between the feed rate of the sheet S from the first roll R1 (5 m / min) and the supply speed of the sheet S from the drive unit 70 (0 m / min). The surplus can be collected and stored.

Next, as shown in FIG. 6, the sheet S of the first roll R1 is cut by the cutter 25 on the upstream side of the position where the sheet S of the second roll R2 is in contact, and then the first roll R1 and the sheet S are cut. The rotation of the second roll R2 is stopped (step S65). Then, in the controller 80, the first roll R1 is switched from the control of the supply side roll to the control of the standby side roll, and the second roll R2 is switched from the control of the standby side roll to the control of the supply side roll (step S66).

Here, in the joining step S60, "the feed rate of the sheet S from the first roll R1 matches the speed of the outer peripheral surface of the second roll R2" means that both speeds match at the pressing position P1. Therefore, it is possible to slightly slow down the speed of the sheet S delivered from the first roll R1 as long as it does not affect the feed speed of the sheet S at the pressing position P1. As a result, the tension of the sheet S between the first roll R1 and the pressing position P1 can be increased, so that the sheet S can be easily cut by the cutter 25 as compared with the state where the sheet S is loosened.

Next, the feedback control to the second support shaft 12 based on the detection result by the position detection sensor 34 of the storage mechanism 30 is turned on, and the storage amount of the sheet S in the storage mechanism 30 is increased by rotating the second roll R2. Adjust to an appropriate amount (step S67). After that, the joining unit 23 is retracted, and the rotating member 17 is rotated so that the second roll R2 is located above the first roll R1 in the Z direction (step S68). Further, as shown in FIG. 7, the sheet S on the upstream side of the cutting position is wound by rotating the first roll R1 in the reverse direction, and the rotation of the first roll R1 is stopped after the winding is completed (step S69). This step S69 is executed in parallel with the above steps S67 and S68.

After that, the second support shaft 12 and the drive unit 70 are set to the controller 80 (axis control unit 12, roller) so that the tip of the new seat S unwound from the second roll R2 is guided to the downstream line via a predetermined path. After being controlled by the control unit 81E), the transfer of the sheet S is resumed at a predetermined transfer speed as the operation of the downstream line is restarted. The sheet supply method according to the present embodiment is implemented by the above procedure.

(Embodiment 2)
Next, the sheet supply device and the sheet supply method according to the second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the sheet S is joined in the line stopped state as described above, whereas in the second embodiment, the sheet S is joined in the steady state where the sheet S is supplied to the downstream line. Will be done. Hereinafter, only the points different from the first embodiment will be described.

First, the configuration of the sheet supply device 1A according to the second embodiment will be described. The storage mechanism 30 of the sheet supply device 1A discharges excess or deficiency of the sheet S caused by a speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70 when the sheets are joined. Works like this. Specifically, as shown in FIG. 8, the storage mechanism 30 accumulates a predetermined amount of the sheet S in addition to the feedback control mechanism (fixed rolls 31, 32, moving roll 33) described in the first embodiment. It further has a mechanism 35. The storage mechanism 35 is arranged between the joining mechanism 20 and the feedback control mechanism.

The storage mechanism 35 has a plurality of fixed guide rolls 37 and a plurality of moving guide rolls 36. The position of the fixed guide roll 37 is fixed, and the moving guide roll 36 can move in the direction approaching the fixed guide roll 37 or in the direction away from the fixed guide roll 37. Specifically, the moving guide roll 36 moves in a direction away from the fixed guide roll 37 so that the path length of the sheet S becomes longer, or the moving guide roll 36 moves in a direction away from the fixed guide roll 37, or the moving guide roll 36 moves so as to shorten the path length of the sheet S. It moves in the direction approaching the roll 37.

Next, the sheet supply method according to the second embodiment, which is performed using the sheet supply device 1A, will be described. In this sheet supply method, the sheet S is joined in a steady state in which the sheet S is supplied to the downstream line. Therefore, step S30 in FIG. 3 is omitted, and instead of step S20, it is confirmed whether or not a predetermined joining condition (for example, whether or not the remaining amount of the first roll R1 is less than the predetermined amount) is satisfied, and the condition is satisfied. In this case, the second roll R2 moves to the splice position (FIG. 8) in the steady state (step S40).

Next, in the joint preparation step S50, while maintaining the steady state, the radius measurement of the second roll R2 (step S51), the approach of the joint unit 23 (step S52), the position detection of the adhesive member H (step S53), and The position adjustment (step S54) of the adhesive member H is performed respectively.

Next, in the joining step S60, the step S61 for turning off the control of the first support shaft 11 by the seat tension is omitted. The feedback control mechanism feedback-controls the feed rate of the sheet S from the first roll R1 and the amount of the sheet S stored in the storage mechanism 35 based on the tension of the sheet S via the controller 80. Then, the controller 80 controls the storage mechanism 35 to move the movement guide roll 36, picks up the sheet S from the upstream side, and stores it in the storage mechanism 35.

The first support shaft 11 is controlled by the feedback from the feedback control mechanism so that the feed rate of the sheet S from the first roll R1 becomes faster than the predetermined transfer speed. Then, the excess sheet S due to the speed difference between the accelerated feed rate of the sheet S and the predetermined transfer speed is stored in the storage mechanism 35. This operation is performed instead of step S62 (rewinding of the first roll R1) of FIG.

Next, the first support shaft 11 is set so that the feed rate of the sheet S from the first roll R1 becomes slower than the predetermined transfer speed (the same speed as the supply speed of the sheet S from the drive unit 70). It is controlled by the controller 80 (axis control unit 81B). At the same time, the feedback control mechanism feedback-controls the storage mechanism 35 via the controller 80 so that the sheet S is fed out from the storage mechanism 35 to the downstream side at the predetermined transfer speed. Specifically, the moving guide roll 36 is moved, and the sheet S for the shortage due to the speed difference between the pick-up speed from the upstream side to the storage mechanism 35 and the delivery speed from the storage mechanism 35 to the downstream side is stored in the storage mechanism 35. To spit out to the downstream side. The remaining joining step S60 is performed while the insufficient sheet S is discharged from the storage mechanism 35 to the downstream side.

That is, the second support shaft 12 is controlled by the controller 80 (axis control unit 81B) so that the speed of the outer peripheral surface of the second roll R2 matches the feed speed of the sheet S from the first roll R1. That is, step S64 in FIG. 4 is performed prior to step S63.

Next, the intermediate portion of the sheet S drawn out from the first roll R1 is pressed against the outer peripheral surface of the second roll R2 at the timing when the adhesive member H on the outer peripheral surface of the second roll R2 passes through the pressing position P1. , The joining mechanism 20 is controlled by the controller 80 (unit control unit 81C) (step S63). As a result, the sheet S of the second roll R2 comes into contact with the sheet S of the first roll R1 in the steady state.

In the joining step S60, the sheet S stored in the storage mechanism 35 is supplied to the downstream line at the predetermined transfer speed, and the sheet S unwound from the first roll R1 is taken up by the storage mechanism 35. .. Here, since the feed rate of the sheet S from the first roll R1 is slower than the predetermined transfer speed, the storage amount of the sheet S in the storage mechanism 35 gradually decreases due to the difference between the two speeds. ..

After the joining operation is completed, the sheet S from the first roll R1 is cut by the cutter 25 at the upstream position of the joint while maintaining the feeding of the sheet S from the first roll R1 and the rotation of the second roll R2 (step). S65). Then, the roll control is switched in the same manner as in the first embodiment (step S66).

After that, the positions of the first and second rolls R1 and R2 are adjusted (step S68). Here, since the feedback control to the second support shaft 12 and the storage mechanism 35 by the seat tension is still performed, step S67 in FIG. 4 is omitted. Then, when all the sheets S stored in the storage mechanism 35 are discharged to the downstream side, the movement guide roll 36 of the storage mechanism 35 is stopped, and the feed rate of the sheet S from the second roll R2 is increased from the drive unit 70. It is controlled to be the same as the supply speed of the sheet S to the downstream side (that is, the predetermined transfer speed). This operation is performed instead of step S69 (winding of the sheet S of the first roll R1) in FIG.

In the second embodiment, the sheet S is supplied from the drive unit 70 to the line on the downstream side at high speed, and the feed rate of the sheet S from the first roll R1 is set to an appropriate speed at which the joining operation is easy to be performed. It becomes easier to take the timing of operation. Then, the excess or deficiency of the sheet S caused by the speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70 can be discharged from the storage mechanism 30.

Here, the features and effects of the sheet supply devices 1 and 1A and the sheet supply method according to the first and second embodiments described above will be described.

The sheet supply method according to the first and second embodiments includes a first support shaft 11 that rotatably supports the first roll R1 around which the sheet S is wound at its center position, and a second roll R2 around which the sheet S is wound. From the second support shaft 12 that rotatably supports the center position, the joining mechanism 20 for contacting the sheet S of the second roll R2 with the sheet S of the first roll R1, and the first roll R1 or the second roll R2. Storage that is arranged between the drive unit 70 that supplies the fed-out sheet S to the downstream side and the first support shaft 11 and the drive unit 70, and takes over the sheet S on the upstream side to store a predetermined amount of the sheet S. This is a method in which the sheet S is sequentially fed from the first roll R1 and the second roll R2 by using the sheet supply devices 1 and 1A provided with the mechanism 30. This sheet supply method includes a feeding step of controlling the first support shaft 11 and a first roll R1 so that the sheet S is supplied from the drive unit 70 to the downstream side at a predetermined transfer speed in the device on the downstream side. The first part of the sheet S drawn out from the first roll R1 is pressed against the outer peripheral surface of the second roll R2 in a state where the feed rate of the sheet S from the sheet S is matched with the speed of the outer peripheral surface of the second roll R2. After controlling the support shaft 11, the second support shaft 12, and the joining mechanism 20 and joining the sheet S from the first roll R1 to the sheet S of the second roll R2, from the first roll R1 at an upstream position of the joining portion. A joining step for cutting the sheet S of the above. In the joining step, the first support is provided so that the feed rate of the sheet S from the first roll R1 is smaller than the predetermined transfer speed in the feeding step and different from the supply speed of the sheet S from the drive unit 70 in the joining step. The shaft 11 is controlled, and the storage mechanism 30 takes over and stores the excess or deficiency of the sheet S caused by the speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70. Or spit it out.

The sheet supply devices 1 and 1A according to the first and second embodiments are devices that sequentially feed and supply the sheet S from the first roll R1 and the second roll R2 around which the sheet S is wound. The sheet supply device 1 includes a first support shaft 11 that rotatably supports the first roll R1 at its center position, a second support shaft 12 that rotatably supports the second roll R2 at its center position, and a second. A joining mechanism 20 for joining the sheet S of the roll R2 to the sheet S of the first roll R1, and a cutter 25 for cutting the sheet S unwound from the first roll R1 on the upstream side of the joint after the joining operation. The joining mechanism 20 including, the drive unit 70 that supplies the sheet S unwound from the first roll R1 or the second roll R2 to the downstream side of the sheet supply device 1, and the sheet S from the sheet supply devices 1, 1A to the downstream side. The first support shaft 11 is controlled so that the seat S is sent out from the drive unit 70 to the downstream side at a predetermined transfer speed in the device on the downstream side, and the first roll is connected when the seats are joined. The first so as to press the middle portion of the sheet S drawn out from the first roll R1 against the outer peripheral surface of the second roll R2 in a state where the feed rate of the sheet S from R1 and the speed of the outer peripheral surface of the second roll R2 match. The controller 80 that controls the support shaft 11, the second support shaft 12, and the joint mechanism 20 is arranged between the first support shaft 11 and the drive unit 70, and the seat S on the upstream side is taken over to obtain a predetermined amount of the seat S. It is provided with a storage mechanism 30 for storing. In the controller 80, the feed rate of the sheet S from the first roll R1 at the time of sheet connection is smaller than the predetermined transfer speed and is different from the supply speed of the sheet S from the drive unit 70 at the time of sheet connection. 1 The support shaft 11 is controlled, and the storage mechanism 30 takes over and stores the excess or deficiency of the sheet S caused by the speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70. Acts to spit or spit.

As a result, the feed rate of the sheet S from the first roll R1 at the time of sheet connection is smaller than the transfer speed of the sheet S predetermined in the device on the downstream side, and from the drive unit 70 at the time of sheet connection to the downstream side. The speed can be different from the supply speed of the sheet S to be sent out. Therefore, even if the sheet supply to the downstream side is high speed, the feed rate of the sheet S from the first roll R1 at the time of sheet joining can be lowered to an appropriate speed at which the joining operation can be easily performed. The joining operation can be performed at an accurate timing. Further, during the joining operation, the storage mechanism 30 takes over and stores the excess or deficiency of the sheet S caused by the speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70. Therefore, even when the device on the downstream side is stopped, that is, even if the transport speed of the sheet S fed from the drive unit 70 to the downstream side is zero, the sheet S is fed from the first roll R1 at a predetermined feed rate. Since it can be fed out, it is possible to touch the sheet S in a state where the sheet supply to the downstream side is stopped.

In the sheet supply method according to the first embodiment, in the joining step, when the supply of the sheet S from the drive unit 70 to the downstream side is stopped, the feed rate of the sheet S from the first roll R1 and the second roll R2 The first support shaft 11, the second support shaft 12, and the joining mechanism so as to press the middle portion of the sheet S drawn out from the first roll R1 against the outer peripheral surface of the second roll R2 in a state where the speed of the outer peripheral surface of the first roll R1 is matched. 20 is controlled, and the storage mechanism 30 collects and stores the surplus sheet S generated by the speed difference between the feed rate of the sheet S from the first roll R1 and the supply speed of the sheet S from the drive unit 70. In the sheet supply device 1 according to the first embodiment, when the supply of the sheet S from the drive unit 70 to the downstream side is stopped, the controller 80 feeds the sheet S from the first roll R1 and the second roll. The first support shaft 11, the second support shaft 12, and the joint so as to press the middle portion of the sheet S drawn out from the first roll R1 against the outer peripheral surface of the second roll R2 in a state where the speed of the outer peripheral surface of R2 matches. The mechanism 20 is controlled. As a result, the sheet S can be joined even when the line is stopped, such as when changing the specifications of the sheet S.

In the sheet supply method according to the first embodiment, in the joining step, the first roll R1 winds up the sheet S in advance before the joining operation so that the storage amount of the sheet S in the storage mechanism 30 is minimized. Controls the support shaft 11. In the sheet supply device 1 according to the first embodiment, the controller 80 has a first roll R1 that winds up the sheet S in advance before the joining operation so that the storage amount of the sheet S in the storage mechanism 30 is minimized. 1 Controls the support shaft 11. As a result, when the supply of the sheet S from the drive unit 70 to the downstream side is stopped, even if the sheet S is fed out from the first roll R1 during the joining operation, a sufficient amount of the sheet S in the storage mechanism 30 is used. Can be stored.

In the sheet supply method according to the first embodiment, in the joining step, the middle portion of the sheet S of the first roll R1 is rolled into the second roll in a state where the feeding of the sheet S from the first roll R1 and the rotation of the second roll R2 are stopped. The first support shaft 11, the second support shaft 12, and the joining mechanism 20 are controlled so that the first roll R1 and the second roll R2 start rotating after being pressed against the outer peripheral surface of R2. In the sheet supply device 1 according to the first embodiment, the controller 80 of the sheet S of the first roll R1 in a state where the feeding of the sheet S from the first roll R1 and the rotation of the second roll R2 are stopped when the sheets are joined. The first support shaft 11, the second support shaft 12, and the joining mechanism 20 are controlled so that the intermediate portion is pressed against the outer peripheral surface of the second roll R2 and then the rotation of the first roll R1 and the second roll R2 starts. As a result, both sheets S can be pressed in a state where the feeding of the sheets S by the first roll R1 and the second roll R2 is stopped, so that the adhesive member H provided on the outer peripheral surface of the second roll R2 is first. The second roll R2 can be positioned at an appropriate position on the upstream side in the rotation direction with respect to the position P1 for pressing the sheet S unwound from the roll R1. As a result, both sheets S can be reliably connected via the adhesive member H by slightly moving the sheet S of the first roll R1 and the second roll R2 during the joining operation. Therefore, both sheets S can be reliably connected without excessively increasing the storage amount of the sheets S in the storage mechanism 30.

The sheet supply method according to the first embodiment includes a joint preparation step for detecting the position of the adhesive member H provided on the outer peripheral surface of the second roll R2 in the circumferential direction on the outer peripheral surface. In the joining step, after pressing the intermediate portion of the sheet S of the first roll R1 to a position other than the adhesive member H on the outer peripheral surface of the second roll R2 based on the above detection result, the adhesive member H passes through the pressing position. The second support shaft 12 and the joining mechanism 20 are controlled so that the second roll R2 rotates until. In the sheet supply device 1 according to the first embodiment, the joining mechanism 20 includes an adhesive member detector 22 that detects the position of the adhesive member H provided on the outer peripheral surface of the second roll R2 in the circumferential direction on the outer peripheral surface. doing. When the sheet is joined, the controller 80 presses the middle portion of the sheet S of the first roll R1 to a position other than the adhesive member H on the outer peripheral surface of the second roll R2 based on the detection result by the adhesive member detector 22. The second support shaft 12 and the joining mechanism 20 are controlled so that the second roller R2 rotates until the adhesive member H passes the pressing position P1. As a result, by ensuring that the adhesive member H passes through the pressing position P1 of both sheets S, both sheets S can be reliably brought into contact with each other using the entire length of the adhesive member H.

(Other embodiments)
Finally, other embodiments of the present invention will be described.

In the first embodiment, a case where the sheet S of the first roll R1 is pressed against the outer peripheral surface of the second roll R2 while the rotation of the first roll R1 and the second roll R2 is stopped has been described, but the present invention is not limited to this. For example, the pressing operation may be performed while feeding out the sheet S from the first roll R1. Further, the outer diameter detection of the second roll R1, the position detection of the adhesive member H, and the position adjustment of the adhesive member H may be performed while feeding out the sheet S from the first roll R1.

In the first embodiment, the case where the rotation of the first roll R1 and the second roll R2 is stopped after the sheet S of the first roll R1 is cut by the cutter 25 has been described, but the rotation of the first roll R1 and the second roll R2 has been described. The sheet S may be cut after stopping.

In the first embodiment, the storage mechanism 30 is also used as the feedback control mechanism, but a storage mechanism (storage mechanism 35) may be provided separately from the control mechanism as in the second embodiment. Further, in the second embodiment, the storage mechanism 35 may be omitted by increasing the storage amount of the sheet S in the feedback control mechanism.

In the second embodiment, the case where the sheet S of the first roll R1 is pressed against the outer peripheral surface of the second roll R2 while feeding out the sheet S from the first roll R1 has been described, but the pressing operation is performed on the first roll R1 and the second roll. It may be performed in a state where the rotation of R2 is stopped.

In both the first and second embodiments, the case where the rotating member 17 has the first support shaft 11 and the second support shaft 12 has been described, but the rotating member 17 has three or more support shafts and each support. Each shaft may rotatably support the rolls at their central position.

The outline of the above embodiment is as follows.

In the sheet supply method according to the above embodiment, the first support shaft that rotatably supports the first roll around which the sheet is wound and the second roll around which the sheet is wound can be rotated at the center position. A second support shaft to support, a joining mechanism for contacting the sheet of the second roll with the sheet of the first roll, and a supply for supplying the sheet unwound from the first roll or the second roll to the downstream side. A sheet supply device provided with a unit, a storage mechanism arranged between the first support shaft and the supply unit, and a storage mechanism for picking up an upstream sheet and storing a predetermined amount of sheets, is used. This is a method of sequentially feeding out and supplying sheets from one roll and the second roll. In this sheet supply method, the feeding step for controlling the first support shaft and the first roll so that the sheet is supplied from the supply unit to the downstream side at a predetermined transfer speed in the downstream device. The first support shaft is pressed against the outer peripheral surface of the second roll so as to press the middle portion of the sheet unwound from the first roll in a state where the feeding speed of the sheet and the speed of the outer peripheral surface of the second roll match. , The second support shaft and the joining mechanism are controlled, the sheet from the first roll is joined to the sheet of the second roll, and then the sheet from the first roll is cut at an upstream position of the joining portion. Including splicing steps. In the joining step, the feeding speed of the sheet from the first roll is smaller than the predetermined transport speed in the feeding step and different from the feeding speed of the sheet from the feeding section in the joining step. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. , Or spit it out.

According to the above-mentioned sheet feeding method, the feeding speed of the sheet from the first roll in the joining step is smaller than the predetermined feeding speed of the sheet in the device on the downstream side, and the sheet is fed from the supply unit in the joining step to the downstream side. The speed can be different from the supply speed of the sheet. Therefore, even if the sheet supply to the downstream side is high speed, the feeding speed of the sheet from the first roll in the joining step can be reduced to an appropriate speed at which the joining operation can be easily performed, so that the timing can be easily and accurately determined. You can perform the joining operation with. Further, during the joining operation, the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the sheet feeding speed from the first roll and the sheet supply speed from the supply unit. Therefore, even when the device on the downstream side is stopped, that is, even if the transport speed of the sheet fed from the supply unit to the downstream side is zero, the sheet can be fed out from the first roll at a predetermined feed rate. Therefore, it is possible to connect the seats while the seat supply to the downstream side is stopped.

In the sheet supply method, in the joining step, when the supply of the sheet from the supply unit to the downstream side is stopped, the feed rate of the sheet from the first roll and the outer peripheral surface of the second roll The first support shaft, the second support shaft, and the joining mechanism are controlled so as to press the middle portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll in a state where the speed is matched. The storage mechanism may take over and store the excess sheet generated by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit.

According to this method, it is possible to perform the sheet joining operation even when the line is stopped, such as when changing the seat specifications.

In the sheet feeding method, in the joining step, the first support shaft is controlled so that the first roll winds up the sheet in advance and the amount of the sheet stored in the storage mechanism is minimized before the joining operation. You may.

According to this method, when the supply of sheets from the supply unit to the downstream side is stopped, a sufficient amount of sheets are stored in the storage mechanism even when the sheets are fed out from the first roll during the joining operation. be able to.

In the sheet feeding method, in the joining step, the middle portion of the sheet of the first roll is placed on the outer peripheral surface of the second roll in a state where the feeding of the sheet from the first roll and the rotation of the second roll are stopped. The first support shaft, the second support shaft, and the joining mechanism may be controlled so that the first roll and the second roll start to rotate after pressing.

According to this method, both sheets can be pressed while the feeding of the sheets by the first roll and the second roll is stopped, so that the adhesive member provided on the outer peripheral surface of the second roll is unwound from the first roll. It can be positioned at an appropriate position on the upstream side in the rotation direction of the second roll with respect to the position where the sheet is pressed. As a result, both sheets can be reliably connected via the adhesive member by slightly moving the sheet of the first roll and the second roll during the joining operation. Therefore, both seats can be reliably connected without excessively increasing the amount of seats stored in the storage mechanism.

The sheet supply device according to the above embodiment is a device for sequentially feeding and supplying sheets from a first roll and a second roll around which the sheets are wound. The sheet feeding device includes a first support shaft that rotatably supports the first roll at its center position, a second support shaft that rotatably supports the second roll at its center position, and the second roll. A joining mechanism for joining the sheet of the first roll to the sheet of the first roll, the joining mechanism including a cutter for cutting the sheet unwound from the first roll on the upstream side of the joining portion after the joining operation, and the above. In the supply unit that supplies the sheet unwound from the first roll or the second roll to the downstream side of the sheet supply device, and in the steady state of supplying the sheet from the sheet supply device to the downstream side, in the device on the downstream side. The first support shaft is controlled so that the sheet is fed downstream from the supply unit at a predetermined transfer speed, and the feed rate of the sheet from the first roll and the feed rate of the second roll at the time of joining the sheets The first support shaft, the second support shaft, and the joining mechanism are controlled so as to press the middle portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll in a state where the speed of the outer peripheral surface is matched. The controller is provided between the first support shaft and the supply unit, and a storage mechanism for taking up the sheets on the upstream side and storing a predetermined amount of sheets. In the controller, the feed rate of the sheet from the first roll at the time of sheet connection is smaller than the predetermined transfer speed and is different from the sheet supply speed from the supply unit at the time of sheet connection. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. Acts to spit or spit.

According to the sheet supply device, the feed rate of the sheet from the first roll at the time of sheet connection is smaller than the sheet transfer speed predetermined in the device on the downstream side and downstream from the supply unit at the time of sheet connection. The speed can be different from the transport speed of the sheet sent to. Therefore, unlike the conventional sheet feeding device, even if the sheet is supplied to the line at a high speed, the feeding speed of the sheet by the first roll at the time of sheet joining can be reduced to an appropriate speed at which the joining operation can be easily performed. Therefore, the joining operation can be easily performed at an accurate timing. Further, during the joining operation, the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the sheet feeding speed from the first roll and the sheet supply speed from the supply unit. Therefore, even when the device on the downstream side is stopped, that is, even if the transport speed of the sheet fed from the supply unit to the downstream side is zero, the sheet can be fed out from the first roll at a predetermined feed rate. Therefore, it is possible to connect the seats while the seat supply to the downstream side is stopped.

In the sheet supply device, the controller has a feed rate of the sheet from the first roll and a speed of the outer peripheral surface of the second roll when the supply of the sheet from the supply unit to the downstream side is stopped. Even if the first support shaft, the second support shaft, and the joining mechanism are controlled so as to press the middle portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll in a state of being aligned with each other. Good.

According to this configuration, it is possible to perform the sheet joining operation even when the line is stopped, such as when changing the seat specifications.

After that, the second support shaft 12 and the drive unit 70 move the controller 80 (shaft control unit 81B , roller) so that the tip of the new seat S unwound from the second roll R2 is guided to the downstream line via a predetermined path. After being controlled by the control unit 81E), the transfer of the sheet S is resumed at a predetermined transfer speed as the operation of the downstream line is restarted. The sheet supply method according to the present embodiment is implemented by the above procedure.

In the first embodiment, a case where the sheet S of the first roll R1 is pressed against the outer peripheral surface of the second roll R2 while the rotation of the first roll R1 and the second roll R2 is stopped has been described, but the present invention is not limited to this. For example, the pressing operation may be performed while feeding out the sheet S from the first roll R1. Further, the outer diameter detection of the second roll R2 , the position detection of the adhesive member H, and the position adjustment of the adhesive member H may also be performed while feeding out the sheet S from the first roll R1.

Claims (6)

A first support shaft that rotatably supports the first roll around which the sheet is wound at its center position, a second support shaft that rotatably supports the second roll around which the sheet is wound at its center position, and the first support shaft. A joining mechanism for contacting the sheet of the first roll with the sheet of the first roll, a supply unit for supplying the sheet fed from the first roll or the second roll to the downstream side, the first support shaft, and the said. Using a sheet supply device provided with a storage mechanism that is arranged between the supply unit and takes up the sheets on the upstream side and stores a predetermined amount of sheets, the sheets are sequentially arranged from the first roll and the second roll. It is a sheet supply method that feeds out and supplies
A feeding step for controlling the first support shaft so that the sheet is supplied from the supply unit to the downstream side at a predetermined transfer speed in the device on the downstream side.
With the feeding speed of the sheet from the first roll and the speed of the outer peripheral surface of the second roll matched, the middle portion of the sheet fed out from the first roll is pressed against the outer peripheral surface of the second roll. After controlling the first support shaft, the second support shaft, and the joining mechanism and joining the sheet from the first roll to the sheet of the second roll, from the first roll at an upstream position of the joining portion. Including joining steps to cut the sheet of
In the joining step, the feeding speed of the sheet from the first roll is smaller than the predetermined transport speed in the feeding step and different from the feeding speed of the sheet from the feeding section in the joining step. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. , Or spit out, sheet feeding method. In the joining step, when the supply of the sheet from the supply unit to the downstream side is stopped, the feeding speed of the sheet from the first roll and the speed of the outer peripheral surface of the second roll match. The first support shaft, the second support shaft, and the connection mechanism are controlled so as to press the middle portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll. The sheet supply according to claim 1, wherein a surplus sheet generated by a speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit is collected and stored. Method. The joining step is characterized in that, before the joining operation, the first roll winds up the sheet in advance and controls the first support shaft so that the amount of the sheet stored in the storage mechanism is minimized. , The sheet supply method according to claim 1 or 2. In the joining step, the middle portion of the sheet of the first roll is pressed against the outer peripheral surface of the second roll with the feeding of the sheet from the first roll and the rotation of the second roll stopped, and then the first roll is performed. The invention according to any one of claims 1 to 3, wherein the first support shaft, the second support shaft, and the connecting mechanism are controlled so that the roll and the second roll start to rotate. Sheet supply method. A sheet supply device that sequentially feeds and supplies sheets from the first roll and the second roll around which the sheets are wound.
A first support shaft that rotatably supports the first roll at its center position,
A second support shaft that rotatably supports the second roll at its center position,
The joining mechanism for joining the sheet of the second roll to the sheet of the first roll, the joining including a cutter for cutting the sheet unwound from the first roll on the upstream side of the joint after the joining operation. Mechanism and
A supply unit that supplies the sheet unwound from the first roll or the second roll to the downstream side of the sheet supply device, and
In a steady state in which the sheet is supplied from the sheet supply device to the downstream side, the first support shaft is controlled so that the sheet is sent out from the supply unit to the downstream side at a predetermined transfer speed in the device on the downstream side. In addition, when the sheets are joined, the middle portion of the sheet drawn out from the first roll in a state where the feeding speed of the sheet from the first roll and the speed of the outer peripheral surface of the second roll match, is the outer peripheral surface of the second roll. A controller that controls the first support shaft, the second support shaft, and the connection mechanism so as to be pressed against the
It is provided with a storage mechanism, which is arranged between the first support shaft and the supply unit, and which takes up the sheets on the upstream side and stores a predetermined amount of sheets.
In the controller, the feed rate of the sheet from the first roll at the time of sheet connection is smaller than the predetermined transfer speed and is different from the sheet supply speed from the supply unit at the time of sheet connection. The first support shaft is controlled, and the storage mechanism takes over and stores the excess or deficiency of the sheet caused by the speed difference between the feed rate of the sheet from the first roll and the supply speed of the sheet from the supply unit. A seat feeder that operates to squeeze or spit out. When the supply of the sheet from the supply unit to the downstream side is stopped, the controller is in a state where the feed rate of the sheet from the first roll and the speed of the outer peripheral surface of the second roll match. The sheet according to claim 5, wherein the first support shaft, the second support shaft, and the joining mechanism are controlled so as to press an intermediate portion of the sheet unwound from the first roll against the outer peripheral surface of the second roll. Supply device.

Images