JP3974916B2 - Web joining device - Google Patents

Description

  The present invention relates to a web joining apparatus for joining a web of a new web roll to a remaining web roll having a small amount of remaining web.

  In Patent Documents 1 and 2, an adhesive tape is placed in advance on the outermost web of the new web roll, and the web of the remaining web roll is pressed against the outermost web of the rotated new web roll using a paster roller. Thus, it is disclosed that the web of the remaining web roll and the web of the new web roll are joined by an adhesive tape.

Japanese Patent Laid-Open No. 9-12185 (FIG. 1) JP 2002-338098 A (paragraph number 0014, FIG. 1)

  The pasta roller is reciprocally driven by an air cylinder or the like as shown in Patent Document 2, but the air cylinder has a time from the start of opening a control valve connected to the cylinder to the start of operation of the cylinder, Variations occur in the time until the piston reaches a predetermined position.

  For this reason, the paster roller cannot be pressed against the web of the remaining web roll at an appropriate timing, and the web of the new web roll may not be properly joined to the web of the remaining web roll.

  An object of the present invention is to provide a web joining apparatus that reliably joins a web of a remaining web roll and a web of a new web roll.

  The web joining apparatus according to the present invention presses the web 6 of the remaining web roll 1 having a small remaining amount against the outermost periphery of the new web roll 1 in a rotating state using the paster roller 3. The web 6 of the remaining web roll 1 and the web 6 of the new web roll 1 are joined together by the adhesive 7 previously disposed on the outermost periphery.

  In the present invention, the paster roller 3 is connected to the rod 21 of the servo cylinder 19 that is feedback-controlled, and is disposed on the paster arm 5 together with the servo cylinder 19. The paster arm 5 moves so that the paster roller 3 comes close to the new web roll 1 prior to the joining. The servo cylinder 19 moves the paster roller 3 through the web 6 of the remaining web roll 1 until the adhesive 7 reaches between the paster roller 3 and the new web roll 1 after the paster arm 5 moves. It is set to press against the outermost periphery of the roll 1.

  The adhesive 7 here includes a double-sided tape and the like. The web 6 corresponds to plastic film, paper, metal foil, and the like. The servo cylinder 19 corresponds to one that operates a rod 21 by driving an air pump or a hydraulic pump with a servo motor, and one that operates a rod 21 by rotating a ball screw with a servo motor. The feedback control corresponds to one that detects the position of the rod 21 and controls the servo motor based on the detection result.

  Specifically, it has a diameter measuring means 26 for measuring the diameter of the new web roll 1, and the paster arm 5 determines the position after the movement of the paster arm 5 based on the measurement result of the diameter measuring means 26. Set. The position after the movement of the paster arm 5 is more preferable as the paster roller 3 is closer to the new web roll 1. Since it will be pushed, it is set in consideration of this. After the joining, the paster arm 5 is retracted to a position where the paster roller 3 does not interfere with the withdrawal of the web 6 of the web roll 1.

  Specifically, the servo cylinder 19 is driven directly or indirectly by a servo motor. Furthermore, it has an urging means 22 for urging the paster roller 3 toward the new web roll 1, and the urging means 22 urges the paster roller 3 only in the initial stage when the paster roller 3 starts moving. Yes. Further, the paster arm 5 may have a cutter 20 for cutting the web 6 of the remaining web roll 1.

  According to the present invention, the rod 21 of the servo cylinder 19 moves at a stable timing and speed by feedback control, so that the servo cylinder 19 operates reliably to meet the above-described setting, and therefore the remaining web roll 1 The web 6 and the web 6 of the new web roll 1 can be reliably bonded by the adhesive 7.

  In addition, since the paster arm 5 moves so as to bring the paster roller 3 close to the new web roll 1 prior to the joining, the movement distance of the paster roller 3 by the servo cylinder 19 can be shortened, and the rotation of the new web roll 1 can be reduced. Even at high speeds, the servo cylinder 19 operates to match the above setting.

  When the paster roller 3 is energized only in the initial stage when the paster roller 3 starts to move, the servo cylinder 19 can be easily started to reduce power consumption when starting the servo motor.

  The drawing shows a web joining apparatus to which the present invention is directed, and as shown in FIG. 1, includes a turret arm 2 for mounting a web roll 1 and a paster arm 5 for supporting a paster roller 3 and the like. . The web roll 1 is formed by winding a web 6 of a belt-like body such as a base film of a magnetic recording medium, and the web 6 is pulled out while being attached to the turret arm 2. The paster roller 3 is pressed against the web 6 during joining.

  The turret arm 2 is provided with roll shafts 9 and 9 to which the web rolls 1 are respectively attached at both ends, and the center portion of the turret arm 2 is rotatably supported by the turret arm support base 11. The roll shafts 9 and 9 are rotationally driven by a drive mechanism (not shown), and the rotation speed is controlled by a turret controller (not shown). A guide arm 12 orthogonal to the turret arm 2 is disposed at the center of the turret arm 2, and guide rollers 13 and 13 for guiding the web 6 are disposed at both ends of the guide arm 12, respectively.

  Prior to joining, the paster arm 5 moves the paster roller 3 so as to be close to the new web roll 1, and as shown in FIG. 1) is swingably supported. In addition to the paster roller 3, the paster arm 5 includes a guide roller 17, a servo cylinder 19 for driving the paster roller 3 forward and backward, and a cutter 20 that cuts the web 6 of the remaining web roll 1 having a small remaining amount. And a spring mechanism (biasing means) 22 that urges the paster roller 3. The cutter 20 is supported so as to be swingable with respect to the paster arm 5 and is driven to swing by a drive mechanism (not shown).

  The paster roller 3 and the rod 21 of the servo cylinder 19 are connected to each other by a swing arm 23 bent in a U shape, and the paster roller 3 is rotatably supported by the swing arm 23. The bent portion of the swing arm 23 is supported so as to be swingable with respect to the paster arm 5, and a guide roller 17 is coaxially disposed on the swing shaft of the bent portion.

  The servo cylinder 19 is configured to drive the rod 21 back and forth with air pressure. By driving the air pump connected to the servo cylinder 19 with a servo motor, the movement and stop of the rod 21 are controlled by the servo motor. . The servo cylinder 19 has a position sensor 24 for detecting the position of the rod 21, and the servo motor and the position 24 sensor are connected to a paster controller (not shown). As shown in FIG. 2, the position sensor 24 is arranged along the length direction of the servo cylinder 19 and detects the piston 19 a connected to the rod 21.

  The pasta controller performs feedback control of the servo motor based on the detection result of the position sensor. In other words, the servo motor is rotated at a stable timing and speed according to an instruction signal from the paster controller by feedback control, and thereby the rod 21 of the servo cylinder 19 moves forward and backward at a stable timing and speed. Specifically, the servo cylinder 19 moves the paster roller 3 to the web 6 of the remaining web roll 1 until the double-sided tape 7 reaches between the paster roller 3 and the new web roll 1 after the paster arm 5 moves. Is set to be pressed against the outermost periphery of the new web roll 1.

  As shown in FIG. 1, a dog (detector) 25 is attached to each roll shaft 9 of the turret arm 2, and each dog 25 is a tape detection sensor (not shown) disposed on the turret arm 2. Is to be detected. When the new web roll 1 is mounted on the roll shaft 9, a double-sided tape (adhesive) 7 is attached to the outer surface of the outermost web 6. The double-sided tape 7 is arranged in the same direction as the dog 25 when viewed from the axis of the roll shaft 9.

  The arm support 16 and the turret arm support 11 are provided with a first diameter measuring sensor (diameter measuring means) 26 and a second diameter measuring sensor 28 for measuring the diameter of the new web roll 1 mounted on the roll shaft 9. Are arranged. Data measured by the first diameter measuring sensor 26 is sent to the paster controller and used for swing control of the paster arm 5. Data measured by the second diameter measuring sensor 28 is sent to the turret controller and used for speed control of the roll shaft 9. At this time, it goes without saying that the measurement data of the first diameter measurement sensor 26 may be sent to the turret controller and used for speed control of the roll shaft 9.

  The spring mechanism 22 is configured to urge the paster roller 3 toward the new web roll 1 only at the initial stage when the paster roller 3 starts to move, and one end is fixed to the paster arm 5 as shown in FIGS. In addition, an L-shaped metal fitting 29 having the other end 27 bent at a right angle, a rod 30 having one end connected to a position near the paster roller 3 of the swing arm 23, and urging the rod 30 toward the web 6 side. A compression coil spring 31. The other end 27 of the L-shaped metal fitting 29 is provided with an insertion hole through which the rod 30 is inserted.

  A stopper 32 is provided at the other end of the rod 30 to prevent the L-shaped metal fitting 29 from coming off from the insertion hole. The compression coil spring 31 is externally fitted to the rod 30, and is disposed between the stopper 33 disposed at the intermediate portion of the rod 30 and the other end portion 27 of the L-shaped metal fitting 29. The compression coil spring 31 is set to extend before the paster roller 3 is pressed against the web 6. As shown in FIG. 1, three guide rollers 35, 36, and 37 that guide the web 6 are disposed on the arm support portion 16.

  The joining operation of the web 6 will be described. Before joining shown in FIG. 1, the web 6 of the web roll 1 mounted on one roll shaft 9 (left side in FIG. 1) of the turret arm 2 is moved between the guide roller 17 of the paster arm 5 and the arm support 16. It is pulled out through guide rollers 35, 36, and 37.

  When the remaining amount of the web 6 of the web roll (remaining web roll) 1 decreases, the new web roll 1 is mounted on the other roll shaft 9 (right side in FIG. 1) of the turret arm 2, and this outermost web Double-sided tape 7 is attached to the outer surface of 6 in the width direction of web 6. After this operation is completed, the turret arm 2 is driven and rotated halfway (180 °), and the new web roll 1 is positioned on the paster arm 5 side as shown in FIG. The diameter of the new web roll 1 is measured by the second diameter measuring sensor 28, and the data is sent to the turret controller and used later for speed control as described later.

  Thereafter, when the diameter dimension of the remaining web roll 1 is reduced to a predetermined dimension, an operation for preparing for joining is performed. That is, the paster arm 5 is swung by driving means not shown, and the paster roller 3 comes close to the new web roll 1 side as shown in FIG. In other words, the diameter of the new web roll 1 is measured by the first diameter measuring sensor 26, and the data is sent to the paster controller, and the paster controller reaches the position corresponding to the diameter of the new web roll 1. The paster arm 5 is swung. At this time, the paster roller 3 and the cutter 20 are separated from the web 6.

  Further, the other roll shaft 9 of the turret arm 2 is driven based on the diameter dimension measurement data taken into the turret controller from the second diameter measurement sensor 28, and the peripheral speed of the new web roll 1 is changed to the new web roll. The speed is controlled in accordance with the diameter size of 1 so that the peripheral speed of the new web roll 1 matches the speed of the web 6 of the remaining web roll 1. At this time, it goes without saying that the speed of the web 6 of the remaining web roll 1 may be measured on the downstream side of the web feed, and the speed of the web 6 may be controlled simultaneously with the peripheral speed of the new web roll 1.

  And joining will be performed if the diameter dimension of the remaining web roll 1 becomes still smaller. That is, when it is determined that the double-sided tape 7 of the new web roll 1 faces the pasta roller 3 across the web 6 of the remaining web roll 1 based on the detection of the dog 25 by a sensor (not shown). The servo cylinder 19 is driven. Then, the rod 21 of the servo cylinder 19 advances to swing the swing arm 23, and the paster roller 3 moves along with this, and is pressed against the web 6 of the remaining web roll 1, and as shown in FIG. By the time the tape 7 reaches between the paster roller 3 and the new web roll 1, the web 6 of the remaining web roll 1 is pressed against the outer periphery of the new web roll 1.

  In other words, since the time from the start of movement of the paster roller 3 to the pressing of the web 6 is short, the paster roller 3 is pressed against the web 6 before the new web roll 1 makes one rotation. After being pressed, the new web roll 1 and the paster roller 3 are inserted. Therefore, the web 6 of the remaining web roll 1 is firmly pressed and adhered to the double-sided tape 7 by the pressing force of the paster roller 3, and the web 6 of the remaining web roll 1 and the web 6 of the new web roll 1 are securely joined. Is done.

  Thereafter, based on the detection of the dog 25 by the tape detection sensor, when it is determined that the double-sided tape 7 again faces the pasta roller 3 after the start of the movement of the pasta roller 3, the cutter 20 swings and the remaining web Contact the web 6 of the roll 1 and cut the web 6.

  Thereafter, the rod 21 of the servo cylinder 19 moves backward, and as shown in FIG. 7, the paster roller 3 returns to the paster arm 5 side, and the cutter 20 swings back to the paster arm 5 side. Next, the paster arm 5 swings back to the position shown in FIG. Note that the new web roll 1 may be mounted on the right roll shaft 9 of the turret arm 2 immediately after the web 6 of the new web roll 1 is pulled out.

  The servo cylinder 19 only needs to be driven directly or indirectly by a servo motor. For indirect driving, in addition to the above embodiment, a hydraulic pump is connected to the servo cylinder 19 and the hydraulic pump is servo-controlled. It may be driven by a motor. As direct driving, a rod may be operated by directly rotating a ball screw with a servo motor.

  In the above description, the position of the double-sided tape 7 is indirectly detected based on the dog 25, but the double-sided tape 7 may be directly detected. The operation for preparing the joining may be performed by an operator visually inspecting the diameter of the remaining web roll 1 and starting the preparation for joining by a switch operation. The joint preparation may be started when it is detected that the size has been reduced. Similarly, the joining operation of pressing the pasta roller 3 against the web 6 of the remaining web roll 1 may be performed by a switch operation by the operator. The diameter of the remaining web roll 1 is measured by a sensor, and the joining start dimension is measured. Bonding may be started when it is detected that the current has become smaller. The position sensor 24 may be a sensor that detects the position of the rod 21 based on the rotation speed or rotation angle of the servo motor.

It is a schematic block diagram of the web joining apparatus which concerns on this invention. It is a schematic block diagram which shows the principal part of a web joining apparatus. It is the sectional view on the AA line of FIG. It is a schematic block diagram which shows the state which has located the new web roll on the paster arm side. It is a schematic block diagram which shows operation of joining preparations. It is a schematic block diagram which shows the state which pressed the web of the remaining web rolls on the outer periphery of the new web roll. It is a schematic block diagram which shows the state by which the new web roll was joined and the web was pulled out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Web roll 3 Paster roller 5 Paster arm 6 Web 7 Double-sided tape 19 Servo cylinder 20 Cutter 21 Rod 22 Spring mechanism 26 First diameter measurement sensor

Claims (4)

By pressing the web of the remaining web roll having a small remaining amount against the outermost circumference of the new web roll in a rotating state using a paster roller, the remaining web roll is adhered to the outermost circumference of the new web roll by an adhesive disposed in advance. In a web joining apparatus for joining a roll web and the new web roll web,
The paster roller is connected to a rod of a servo cylinder that is feedback-controlled, and is disposed on a paster arm together with the servo cylinder,
After the paster roller is moved by the paster arm to a position close to the new web roll, the servo cylinder is operated until the adhesive reaches between the paster roller and the new web roll. Is set to press against the outermost periphery of the new web roll through the web of the remaining web roll ,
The paster arm is provided with biasing means for biasing the paster roller toward the new web roll,
The biasing means has a compression spring for biasing the paster roller toward the new web roll,
The urging means urges the paster roller only in an initial stage when the paster roller starts to move by the servo cylinder because the compression spring is fully extended before the paster roller is pressed against the web . The web joining apparatus characterized by the above-mentioned. Having a diameter measuring means for measuring the diameter of the new web roll;
The web joining apparatus according to claim 1, wherein the paster arm sets the position after the movement based on a measurement result of the diameter measuring means.   The web joining apparatus according to claim 1, wherein the servo cylinder is driven by a servo motor. The web joining apparatus according to claim 1, 2, or 3 , wherein the paster arm has a cutter for cutting the web of the remaining web roll .

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