JP2023007179A - Cutting mechanism and cutting method - Google Patents

Abstract

To provide a cutting mechanism which can easily adjust a contact pressure between a rotary cutter and a reception roller.SOLUTION: A cutting mechanism comprises: a rotary cutter 44 for cutting a film; a reception roller 21 for receiving the rotary cutter 44; an arm 43 for rotatably supporting the rotary cutter 44; a slide member 42 on which the arm 43 is rotatably provided; and an air cylinder 45 provided on the slide member 42. In the cutting mechanism, the rotary cutter 44 is rotated and the rotary cutter 44 is pressed against the reception roller 21 by the air cylinder 45 when the slide member 42 is moved in an axial direction, whereby the film wound on the reception roller 21 during transportation is cut by the rotary cutter 44. A socket 451 for supplying air to the air cylinder 45 is provided on an initial position side, and the slide member 42 is provided with a plug 452 which can fit to the socket 451.SELECTED DRAWING: Figure 8

Description

The present invention relates to a cutting mechanism and cutting method.

2. Description of the Related Art Conventionally, a cutting mechanism that cuts a film being transported is known (see, for example, Patent Document 1).

The cutting mechanism disclosed in Patent Document 1 includes a rotary blade for cutting a film, a receiving roller for receiving the rotary blade, an arm for rotatably supporting the rotary blade, a slide member on which the arm is rotatable, and a slide member. and a compression coil spring provided in. In the cutting mechanism, when the slide member is moved in the axial direction of the receiving roller, the rotating blade is rotated, and the rotating blade is pressed against the receiving roller by the compression coil spring, so that the blade is wrapped around the receiving roller. The film being transported is cut by the rotary blade.

JP 2020-157385 A

Here, in the cutting mechanism as described above, the proper value of the contact pressure between the rotary blade and the receiving roller differs depending on the thickness and material of the film. However, in the conventional cutting mechanism described above, the rotating blade is pressed against the receiving roller by the compression coil spring, and it is necessary to replace the compression coil spring in order to adjust the contact pressure, which is time-consuming. There is a problem.

The present invention was made to solve the above problems, and an object of the present invention is to provide a cutting mechanism and a cutting method that can easily adjust the contact pressure between the rotary blade and the receiving roller. That is.

A cutting mechanism according to the present invention cuts a film being transported, and includes a rotary blade for cutting the film, a receiving roller for receiving the rotary blade, an arm for rotatably supporting the rotary blade, and a rotatable arm. a sliding member provided in the receiving roller and capable of moving in the axial direction of the receiving roller; and an air cylinder provided in the sliding member for urging the arm. In the cutting mechanism, when the slide member is moved in the axial direction, the rotating blade is rotated and the rotary blade is pressed against the receiving roller by the air cylinder, thereby cutting the cutting material being conveyed around the receiving roller. The film is configured to be cut by the rotary blade. A socket for supplying air to the air cylinder is provided on the side where the slide member is positioned before the film is cut by the movement of the slide member, and the slide member is provided with a plug that can be fitted into the socket. . The air cylinder has an air chamber connected to a plug, and is configured to be able to adjust an urging force for urging the arm by air pressure supplied to the air chamber. The disconnecting mechanism is such that when the slide member is positioned at the initial position, the plug is fitted into the socket and air is supplied to the air chamber, and when the slide member is axially moved from the initial position, the plug is disconnected. The air chamber is configured to be sealed when removed from the socket.

With this configuration, the contact pressure between the rotary blade and the receiving roller can be easily adjusted by providing the air cylinder for urging the arm.

In the disconnecting mechanism, the plug preferably has an air passage through which air flows and an on-off valve that opens and closes the air passage, and the on-off valve is opened when the plug is fitted in the socket. In addition, the valve is configured to be closed when the plug is removed from the socket.

In the above cutting mechanism, preferably, the biasing force of the air cylinder is adjusted each time the film is cut, and is adjusted before the slide member is moved for cutting the film.

The cutting mechanism preferably includes a rack-and-pinion mechanism having a rack extending in the axial direction and a pinion rotatably provided on the slide member, the pinion and the rotary blade are connected, and the slide member extends axially. , the rotary blade is rotated by rotating the pinion that meshes with the rack.

The above cutting mechanism preferably includes guide members arranged at both ends in the axial direction for bringing the rotary blade into contact with and separating from the receiving roller, the receiving roller being formed in a straight shape, and the guide member being a shaft. The arm of the slide member has a roller that contacts the inclined surface of the guide member.

In the above cutting mechanism, the rotary blade is preferably arranged so as to be inclined with respect to the axial direction so as to face the scanning direction of the rotary blade with respect to the film, and the rotational speed of the rotary blade is such that the surface speed of the rotary blade is equal to the film It is set so that the scanning speed of the rotary blade with respect to

A cutting method according to the present invention includes a rotary blade for cutting a film being transported, a receiving roller for receiving the rotary blade, an arm for rotatably supporting the rotary blade, and a shaft of the receiving roller. This is done in a cutting mechanism comprising a slide member movable in a direction and an air cylinder provided on the slide member for urging the arm. The cutting method includes the step of moving the slide member in the axial direction and returning it to its initial position to fit the plug provided on the slide member into a socket for supplying air to the air cylinder; and adjusting the biasing force for biasing the arm by supplying air to the air chamber of the air cylinder and moving the slide member axially from the initial position. disengaging from the socket and rotating the rotary blade. The air chamber of the air cylinder is sealed when the plug is removed from the socket. The rotary blade, which rotates as the slide member moves, is pressed against the receiving roller by the air cylinder, so that the rotary blade cuts the film being transported and wrapped around the receiving roller.

According to the cutting mechanism and cutting method of the present invention, the contact pressure between the rotary blade and the receiving roller can be easily adjusted.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic diagram which showed the outline of the film winding device by this embodiment. 2 is a view showing a state in which a film is wound around a winding core at a winding position in the film winding device of FIG. 1; FIG. 3 is a view showing a state in which a turret mechanism is rotated in the film winding device of FIG. 2; FIG. 4 is a view showing a state in which a cutting mechanism has been moved to a switching position in the film winding device of FIG. 3; FIG. 5 is an enlarged view of a cutting mechanism of the film winding device of FIG. 4; FIG. It is the figure which looked at the cutting|disconnection part of the cutting|disconnection mechanism of FIG. 5 from the downstream. 6 is a top view of the cutting portion of the cutting mechanism of FIG. 5; FIG. 8 is a diagram showing a state in which a rotary blade is in contact with a receiving roller in the cutting mechanism of FIG. 7; FIG. FIG. 9 is a view showing a state in which movement of a slide member has been completed in the cutting mechanism of FIG. 8; 6 is a diagram for explaining the scanning speed of a rotary blade in the cutting mechanism of FIG. 5; FIG.

An embodiment of the present invention will be described below. In the following description, a case where the present invention is applied to a cutting mechanism provided in a film winding device will be described.

-Constitution-
First, with reference to FIGS. 1, 5 to 7 and 10, the configuration of a film winding device 100 according to this embodiment will be described. In FIG. 1 and the like, the Y1 and Y2 directions are front and rear directions, the X1 and X2 directions are left and right directions, and the Z1 and Z2 directions are up and down directions. Also, in FIGS. 6 and 7, for the sake of explanation, the illustration of the film 150 and the like is omitted, and there are parts that differ from the actual structure.

As shown in FIG. 1, the film winding device 100 is configured to wind the film 150 supplied from the previous process on the upstream side (Y2 direction side) and to switch the winding core 50 on which the film 150 is wound. ing. This film winding device 100 comprises a winding mechanism 1 , a cutting mechanism 2 and an adhesive coating machine 3 . Note that the film 150 is made of resin, for example, and is formed in a strip shape. The thickness and material of the film 150 can be changed, and the film winding device 100 can wind films 150 having different thicknesses and materials.

[Winding mechanism]
The winding mechanism 1 includes a turret mechanism 11, a touch roller 12, and a guide roller 13, and is configured to wind the film 150 supplied from the previous process.

The turret mechanism 11 is configured such that two cores 50 are detachably mounted and the mounted cores 50 can be rotated. Further, the turret mechanism 11 can rotate (revolve) around the rotation shaft 11a, and one of the cores 50 is arranged at the winding position P1 and the other of the cores 50 is arranged at the replacement position P2. ing. Therefore, by rotating the turret mechanism 11 by 180 degrees, the core 50 positioned at the winding position P1 is moved to the replacement position P2, and the core 50 positioned at the replacement position P2 is moved to the winding position P1. is to be moved to

The turret mechanism 11 is configured to wind the film 150 by the winding core 50 at the winding position P1 when winding the film 150, and when the winding core 50 is switched, the winding core is being wound. 50 is retracted to the replacement position P2, and a new core 50 is supplied to the winding position P1. Further, the turret mechanism 11 is rotatably provided with a guide roller 11b for defining the transport path of the film 150 when the winding core 50 is switched.

The touch roller 12 is provided to press the film 150 toward the winding core 50 at the winding position P1. The touch roller 12 is rotatable and configured to move according to the winding diameter of the film 150 wound around the winding core 50 at the winding position P1.

The guide roller 13 is rotatable and provided to guide the film 150 supplied from the previous process to the turret mechanism 11 .

[Cutting mechanism]
The cutting mechanism 2 includes a receiving roller 21, a guide roller 22, and a cutting section 40, and is configured to cut the film 150 being conveyed when the winding core 50 is switched.

When the film 150 is cut, the receiving roller 21 is wound with the film 150 and is moved in the axial direction (X1 and X2 directions) along the surface (peripheral surface) of the receiving roller 21. ). The receiving roller 21 is formed in a straight shape (cylindrical shape) and arranged at the tip of the arm 23 . A pair of left and right arms 23 are provided so as to face each other in the width direction (X1 and X2 directions) of the film 150, and the receiving roller 21 is rotatably provided between them. A pivot shaft 23a is formed at the base end of the arm 23, and the pivot shaft 23a is provided at the tip of an arm 31, which will be described later.

The guide roller 22 is arranged at the tip of the arm 24 , and the cutting section 40 is arranged at the intermediate portion of the arm 24 . A pair of left and right arms 24 are provided so as to face each other in the width direction of the film 150, and the guide roller 22 and the cutting section 40 are provided between them. The arm 24 is configured to be rotatable around a rotating shaft 24a formed at the proximal end. Therefore, the arm 24 retracts the guide roller 22 and the cutting portion 40 downward when winding the film 150, and moves the guide roller 22 and the cutting portion 40 to the upper switching position (see FIG. 5) when switching the winding core 50. It is designed to move to The guide roller 22 is rotatable and provided to define the transport path of the film 150 when the core 50 is switched.

The cutting unit 40 is configured to cut the film 150 that is being transported and wound around the receiving roller 21 by moving the rotary blade 44 in the axial direction of the receiving roller 21 when the winding core 50 is switched. . As shown in FIG. 7, the cutting section 40 includes a main body 41, a slide member 42, an arm 43, a rotary blade 44, an air cylinder 45, a guide member 46, and a motor (driving force source) 47. , a rack and pinion mechanism 48 . In addition, below, the cutting part 40 in a state of being arranged at the switching position will be described.

The body portion 41 is formed to extend in the width direction of the film 150 and bridged between the pair of arms 24 . A guide rail 411 and a rack 48a are formed on the main body 41 so as to extend in the longitudinal direction (X1 and X2 directions). The rack 48a is arranged on the upstream side (Y2 direction side) with respect to the guide rail 411 in a plan view.

The slide member 42 is fitted to the guide rail 411 and configured to be movable along the guide rail 411 . That is, the slide member 42 is provided so as to be slidable in the longitudinal direction of the body portion 41 (the axial direction of the receiving roller 21). This slide member 42 is moved by a driving force from a motor 47 . Further, the slide member 42 is provided with a pinion 48b that meshes with the rack 48a. A rack and pinion mechanism 48 is configured by the rack 48a and the pinion 48b.

The arm 43 is rotatably provided on the shaft 423 (see FIG. 6) of the slide member 42 . The arm 43 is arranged on the downstream side (Y1 direction side) of the slide member 42 when viewed in a plan view, and is arranged between the main body portion 41 and the receiving roller 21 . Further, the arm 43 is provided so as to extend in the left-right direction (X2 direction) from the shaft 423 which is the rotation center. As shown in FIG. 6, the arm 43 is arranged so as to be inclined with respect to the longitudinal direction (horizontal direction) of the main body 41 when viewed from the downstream side. The arm 43 is provided with a roller 431 that contacts the guide member 46 . The roller 431 is arranged on the tip side (X2 direction side) of the arm 43 and on the upstream side (Y2 direction side) of the arm 43 when viewed in plan. In addition, the rotating shaft of the roller 431 is arranged so as to face in the vertical direction.

The rotary blade 44 has a function of cutting the film 150 being conveyed. The rotary blade 44 is formed in a disc shape and has an annular blade portion on the outer peripheral portion. The rotary blade 44 is rotatably supported by the arm 43 . Therefore, the rotating surface of the rotary blade 44 is inclined with respect to the axial direction of the receiving roller 21 . Specifically, the rotary blade 44 is inclined so that the moving direction side (X1 direction side) of the slide member 42 during cutting of the film 150 is arranged on the upper side (Z1 direction side). Further, the rotary blade 44 is configured to be driven to rotate. A power transmission system to the rotary blade 44 will be described later.

An air cylinder 45 is provided to press the rotary blade 44 against the receiving roller 21 . The air cylinder 45 is provided on the slide member 42 and configured to bias the arm 43, as shown in FIG. Specifically, the air cylinder 45 includes a cylinder body 45a attached to the slide member 42 and a piston rod 45b that moves forward and backward with respect to the cylinder body 45a. An air chamber (not shown) is provided inside the cylinder body 45a, and the piston rod 45b advances and retreats according to the air pressure supplied to the air chamber. That is, in the air cylinder 45, it is possible to adjust the thrust (urging force for urging the arm 43) according to the air pressure supplied to the air chamber.

The air cylinder 45 is arranged on the upstream side (Y2 direction side) with respect to the arm 43, and is provided so as to urge the arm 43 downstream (Y1 direction side) with the piston rod 45b. The air cylinder 45 is configured so that the biasing force is adjusted each time the film 150 is cut, and the biasing force is adjusted before the slide member 42 is moved for cutting the film 150 . The biasing force with which the air cylinder 45 biases the arm 43 is set according to the thickness and material of the film 150 . That is, the biasing force of the air cylinder 45 is adjusted so that the contact pressure between the rotary blade 44 and the receiving roller 21 is an appropriate value determined according to the thickness and material of the film 150 .

The guide member 46 is provided to allow the rotary blade 44 to smoothly contact and separate from the receiving roller 21 when the slide member 42 is moved during cutting of the film 150 . The guide member 46 includes a guide member 461 arranged at one end in the longitudinal direction of the main body 41 (the end in the X1 direction) and the other end in the longitudinal direction of the main body 41 (the end in the X2 direction). and a guide member 462 disposed in the . The guide member 461 is formed to extend inward (X2 direction side) from one end, and the guide member 462 is formed to extend inward (X1 direction side) from the other end. The guide members 461 and 462 are arranged on the downstream side (Y1 direction side) with respect to the main body 41 in plan view, and are arranged between the roller 431 of the arm 43 and the receiving roller 21 . The guide member 461 has an inclined surface 461a that is inclined away from the receiving roller 21 toward the outer side (X1 direction side) in the longitudinal direction. The guide member 462 has an inclined surface 462a inclined so as to approach the receiving roller 21 as it advances inward in the longitudinal direction (X1 direction side). The inclined surfaces 461a and 462a are surfaces on the upstream side of the guide members 461 and 462, and the rollers 431 of the arm 43 are brought into contact therewith.

A motor 47 is provided to drive the slide member 42 and the rotary blade 44 . This motor 47 is attached to the body portion 41 . The motor 47 is arranged on the upstream side (Y2 direction side) of the main body portion 41 when viewed in a plan view, and is arranged on one side (X1 direction side) of the main body portion 41 in the longitudinal direction.

As shown in FIG. 6, a pulley 471 is attached to the output shaft of the motor 47 . A shaft 412 is rotatably provided at one end in the longitudinal direction of the main body 41 , and a shaft 413 is rotatably provided at the other end in the longitudinal direction. Pulleys 412 a and 412 b are attached to shaft 412 , and pulley 413 a is attached to shaft 413 . A belt 491 (see FIG. 7) is wound around the pulleys 471 and 412a. A belt 492 (see FIG. 7) is wound around the pulleys 412b and 413a, and the slide member 42 is connected to the belt 492. As shown in FIG. Thereby, the output of the motor 47 is transmitted to the slide member 42 via the belts 491 and 492. As shown in FIG.

Further, as shown in FIG. 5, shafts 421 to 423 are rotatably provided in the slide member 42 . The shaft 421 is arranged so that its axial direction faces the front-rear direction (Y1 and Y2 directions). The axial directions of the shafts 422 and 423 are inclined to the left and right sides (X1 and X2 direction sides) with respect to the vertical direction. A pinion 48b is attached to one end of the shaft 421 (the end in the Y2 direction), and a bevel gear 421a is attached to the other end of the shaft 421 (the end in the Y1 direction). A bevel gear 422 a is attached to the lower side of the shaft 422 , and the bevel gear 422 a is meshed with the bevel gear 421 a of the shaft 421 . A spur gear 422b is attached to the upper side of the shaft 422, a spur gear 423a is attached to the shaft 423, and the spur gears 422b and 423a are meshed. An arm 43 is rotatably attached to the shaft 423 .

Further, as shown in FIG. 6, the arm 43 is rotatably provided with shafts 432 and 433 . The axial directions of the shafts 432 and 433 are inclined to the left and right sides (X1 and X2 direction sides) with respect to the vertical direction. Specifically, shafts 422, 423, 432 and 433 are arranged in parallel. A spur gear 432 a is attached to the shaft 432 , and the spur gear 432 a is meshed with the spur gear 423 a of the shaft 423 . A spur gear 433 a is attached to the shaft 433 , and the spur gear 433 a is meshed with the spur gear 432 a of the shaft 432 . A rotary blade 44 is attached to the shaft 433 .

Therefore, when the pinion 48b is rotated with the movement of the slide member 42, the rotary blade 44 is rotated. Specifically, by moving the slide member 42 in the movement direction (X1 direction) for cutting, the shaft 421 is rotated to the right (clockwise) in FIG. 6, and the shafts 422 and 432 are rotated to the left in FIG. clockwise (counterclockwise) and shafts 423 and 433 are rotated clockwise in FIG. That is, when the slide member 42 moves in the cutting movement direction (X1 direction), the rotary blade 44 is rotated clockwise in FIG.

Here, the rotational speed of the rotary blade 44 is set so that the surface speed of the rotary blade 44 (the speed of the outer peripheral blade portion) is the scanning speed of the rotary blade 44 with respect to the film 150 . For example, as shown in FIG. 10, when the conveying speed V1 of the film 150 is 200 m/min and the moving speed V2 of the slide member 42 is 346.4 m/min, the scanning speed of the rotary blade 44 with respect to the film 150 is V3 becomes approximately 400 m/min. In this case, the rotation speed of the rotary blade 44 is set so that the surface speed of the rotary blade 44 becomes the scanning speed V3 (400 m/min). In this case, the angle θ of the scanning direction of the rotary blade 44 with respect to the width direction (X1 direction) of the film 150 is approximately 30 degrees. Therefore, the rotary blade 44 is inclined so that the rotating surface of the rotary blade 44 faces the scanning direction of the rotary blade 44 . That is, the shaft 433 which is the rotation axis of the rotary blade 44 is arranged so as to be orthogonal to the scanning direction, and the rotary blade 44 is inclined at an angle θ (30 degrees) with respect to the width direction of the film 150 .

Further, as shown in FIG. 7 , a socket 451 for supplying air to the air cylinder 45 is provided at the other longitudinal end (the end in the X2 direction) of the main body 41 . That is, the socket 451 is arranged on the initial position side (the side where the slide member 42 is positioned before the film 150 is cut by the movement of the slide member 42). The slide member 42 is provided with a plug 452 that can be fitted with the socket 451 . That is, the socket 451 is a female coupler, the plug 452 is a male coupler, and the plug 452 can be inserted into and removed from the socket 451 .

The socket 451 is arranged so that the opening faces inward (X1 direction side), and is connected to an air supply source (not shown) for supplying air to the air cylinder 45 . The air supply source is configured to be able to adjust the air pressure supplied to the air chamber of the air cylinder 45 . The socket 451 is configured to output air from the air supply source when the plug 452 is fitted. The plug 452 is formed to extend toward the socket 451 (X2 direction side) and is connected to the air chamber of the air cylinder 45 . The plug 452 has an air passage (not shown) through which air flows and an on-off valve (not shown) that opens and closes the air passage. The on-off valve is configured to automatically open when the plug 452 is fitted into the socket 451 and automatically close when the plug 452 is separated from the socket 451 . When the slide member 42 is located at the initial position, the plug 452 is fitted into the socket 451, the on-off valve is opened, air is supplied to the air chamber, and the slide member 42 is axially moved from the initial position. When the plug 452 is disengaged from the socket 451 when the plug 452 is moved in the (X1 direction), the on-off valve is closed to seal the air chamber.

[Adhesive coating machine]
As shown in FIG. 5, the adhesive applicator 3 applies a hot-melt adhesive (not shown) to the new core 50 at the winding position P1 when switching the core 50, so that the new core 50 is Provision is made for winding the cut film 150 . This adhesive applicator 3 is provided at the tip of an arm 31 . A pair of left and right arms 31 are provided so as to face each other in the width direction of the film 150, and the adhesive applicator 3 is provided between them. The arm 31 is configured to be rotatable around a rotating shaft 31a (see FIG. 1) formed at the proximal end. A pivot shaft 23 a of the arm 23 is provided at the tip of the arm 31 .

-motion-
Next, operation of the film winding device 100 according to the present embodiment will be described with reference to FIGS. 1 to 10. FIG.

[When winding the film]
First, as shown in FIG. 1, the film 150 supplied from the previous process is transported between the core 50 at the winding position P1 and the touch roller 12 via the guide roller 13 . Then, the film 150 is wound around the core 50 at the winding position P1 by rotating the core 50 counterclockwise in FIG. At this time, the guide roller 22 and the cutting section 40 are arranged below (in the Z2 direction), and the receiving roller 21 and the adhesive applicator 3 are arranged above (in the Z1 direction). It is

Then, as shown in FIG. 2, when the winding diameter increases due to the winding of the film 150, the touch roller 12 is moved upstream (Y2 direction side) in accordance with the increase in the winding diameter.

[When switching the winding core]
When the switching of the winding core 50 is started, first, the turret mechanism 11 is rotated 180 degrees counterclockwise in FIG. 2 about the rotation shaft 11a. As a result, as shown in FIG. 3, the core 50 positioned at the winding position P1 is retracted to the replacement position P2, and the new core 50 positioned at the replacement position P2 is moved to the winding position P1. be transported.

Here, when the core 50 is switched, the film 150 is wound by the core 50 at the replacement position P2 until the film 150 is wound on the new core 50 at the winding position P1. That is, the winding core 50 is switched without stopping the transportation of the film 150 supplied from the previous process. The film 150 moving from the new core 50 at the winding position P1 to the core 50 at the replacement position P2 is guided by the guide roller 11b.

Next, by rotating the arm 24 clockwise in FIG. 3 about the rotating shaft 24a, the guide roller 22 and the cutting section 40 are moved upward as shown in FIG. At this time, the guide roller 22 is brought into contact with the film 150 moving from the guide roller 13 to the touch roller 12 , so that the transport path of the film 150 is changed by the guide roller 22 .

Further, by rotating the arm 31 clockwise in FIG. 3 around the rotating shaft 31a, the adhesive applicator 3 is arranged near the new core 50 at the winding position P1, and A roller 21 is arranged above the touch roller 12 . As the arm 23 rotates counterclockwise in FIG. 4 around the rotation shaft 23a, the receiving roller 21 comes into contact with the upper side of the touch roller 12 with the film 150 being conveyed therebetween.

Thus, in the state where the cutting section 40 and the receiving roller 21 are arranged at the switching position (the state shown in FIG. 4), the guide roller 22 is arranged above the receiving roller 21 and moves relative to the receiving roller 21. are arranged so as to be adjacent to each other on the upstream side (Y2 direction side). As a result, the film 150 directed from the guide roller 22 to the receiving roller 21 is directed substantially downward. Then, the film 150 is wound around the receiving roller 21 and is brought into contact with the film 150 within an angular range of 90 degrees in the circumferential direction of the receiving roller 21 . Also, the cutting portion 40 is arranged so as to face the receiving roller 21 . At this time, as shown in FIG. 7, the slide member 42 is arranged outside (X2 direction side) with respect to the receiving roller 21 . That is, the slide member 42 is arranged outside (X2 direction side) with respect to the film 150 in the width direction of the film 150 . That is, the slide member 42 has returned to its initial position, and the plug 452 is fitted into the socket 451 .

Therefore, the on-off valve of the plug 452 is opened, and air is supplied from an air supply source (not shown) to the air chamber of the air cylinder 45, so that the air cylinder 45 exerts an urging force to urge the arm 43. adjusted. That is, when cutting the film 150, the contact pressure when the rotary blade 44 is pressed against the receiving roller 21 is adjusted. The urging force of the air cylinder 45 is adjusted according to the thickness and material of the film 150 so that the contact pressure becomes an appropriate value.

Before the slide member 42 starts moving, the air cylinder 45 urges the arm 43 counterclockwise in FIG. pressed against. Therefore, the rotary blade 44 is arranged at a predetermined distance from the receiving roller 21 in the front-rear direction (Y1 and Y2 directions).

As the slide member 42 is slid along the guide rail 411 in the longitudinal direction (X1 direction), the rotary blade 44 is pressed against the receiving roller 21 by the air cylinder 45, and the rotary blade 44 is moved. The film 150 is moved in the axial direction (X1 direction) along the surface of the receiving roller 21, and the film 150 being conveyed wound around the receiving roller 21 is cut. The rotary blade 44 and the arm 43 supporting the rotary blade 44 are inclined with respect to the movement direction (X1 direction) of the slide member 42, as shown in FIG.

Specifically, when the slide member 42 is moved in the X1 direction by the motor 47, the pinion 48b meshed with the rack 48a is rotated, and the rotary blade 44 coupled with the pinion 48b is rotated. Note that the rotary blade 44 is rotated clockwise in FIG. Further, the plug 452 is separated from the socket 451 by the movement of the slide member 42 in the X1 direction. When the plug 452 is detached from the socket 451, the on-off valve is closed, so that the air chamber of the air cylinder 45 is sealed and the biasing force of the air cylinder 45 is maintained.

At the beginning of movement of the slide member 42, the roller 431 of the arm 43 is pressed against the inclined surface 462a of the guide member 462 by the air cylinder 45, and the roller 431 is moved along the inclined surface 462a. The inclined surface 462a is inclined so as to approach the receiving roller 21 as it advances in the X1 direction. Therefore, the rotary blade 44 is gradually brought closer to the receiving roller 21 while the slide member 42 is moved in the X1 direction. That is, the rotary blade 44 is moved in the Y1 direction as it is moved in the X1 direction. In addition, when the roller 431 is moved along the inclined surface 462a, the roller 431 is driven to rotate.

Next, as shown in FIG. 8, when the rotary blade 44 contacts the receiving roller 21, the roller 431 is separated from the inclined surface 462a. Then, the rotating rotary blade 44 is moved in the X1 direction along the surface of the receiving roller 21 by the slide member 42 while being pressed against the receiving roller 21 by the air cylinder 45 . As a result, the film 150 being transported wound around the receiving roller 21 is cut.

After that, at the final stage of movement of the slide member 42 , the roller 431 of the arm 43 is brought into contact with the inclined surface 461 a of the guide member 461 . The slanted surface 461a is slanted away from the receiving roller 21 as it advances in the X1 direction. Therefore, when the slide member 42 is moved in the X1 direction and the roller 431 is moved along the inclined surface 461a, the rotary blade 44 is gradually separated from the receiving roller 21. As shown in FIG. That is, the rotary blade 44 is moved in the Y2 direction as it is moved in the X1 direction. In addition, when the roller 431 is moved along the inclined surface 461a, the roller 431 is driven to rotate.

Then, as shown in FIG. 9, the slide member 42 is moved to the outside (X1 direction side) with respect to the receiving roller 21 . That is, the slide member 42 is moved from the other end (the end in the X2 direction) of the main body 41 to the one end (the end in the X1 direction), and the receiving roller 21 and the film 150 are arranged within the movement range. It is

Here, the rotation speed of the rotary blade 44 is set so that the surface speed of the rotary blade 44 becomes the scanning speed V3 of the rotary blade 44 with respect to the film 150 . The scanning speed V3 of the rotary blade 44 can be calculated based on the transport speed V1 of the film 150 and the moving speed V2 of the slide member 42, as shown in FIG. Further, the rotary blade 44 is inclined at an angle θ with respect to the moving direction (X1 direction) so that the rotating surface of the rotary blade 44 faces the scanning direction of the rotary blade 44 .

Further, in the adhesive applicator 3 (see FIG. 5), hot melt adhesive is applied to the new winding core 50 at the winding position P1. The hot-melt adhesive is applied to the new core 50 when the front end (upstream cut end) of the cut film 150 passes between the new core 50 and the touch roller 12. A new hot-melt adhesive is positioned between the new core 50 and the touch roller 12 . That is, the timing at which the leading end of the cut film 150 passes between the new core 50 and the touch roller 12, and the hot-melt adhesive applied to the new core 50 between the new core 50 and the touch roller 12 is set to coincide with the timing of passing between

Therefore, when the leading end of the cut film 150 passes between the new core 50 and the touch roller 12, the leading end of the cut film 150 is attached to the new core 50 with the hot-melt adhesive. be done. As a result, the cut film 150 is wound by a new winding core 50, and the winding core 50 on which the film 150 supplied from the previous process is wound is switched. The trailing end portion (downstream cut end) of the cut film 150 is wound by the core 50 at the replacement position P2.

Thereafter, the arm 24 is rotated to retract the guide roller 22 and the cutting section 40 downward, and the arm 31 is rotated to retract the receiving roller 21 and the adhesive applicator 3 upward. Further, by moving the slide member 42 in the X2 direction by the motor 47 , the slide member 42 returns to the initial position and the plug 452 is fitted into the socket 451 . Also, the core 50 at the replacement position P2 is removed, and a new core 50 is attached to the replacement position P2.

By repeating the above operations, the film 150 is continuously wound while switching the winding core 50 .

-effect-
In this embodiment, as described above, the contact pressure between the rotary blade 44 and the receiving roller 21 can be easily adjusted by providing the air cylinder 45 that biases the arm 43 . Therefore, it is possible to easily deal with films 150 having different thicknesses and materials. A socket 451 for supplying air to the air cylinder 45 is provided on the initial position side of the main body 41, a plug 452 that can be fitted with the socket 451 is provided on the slide member 42, and the slide member 42 is at the initial position. The biasing force of the air cylinder 45 is adjusted before the start of cutting, and the air chamber of the air cylinder 45 is sealed when the film 150 is cut. The size of the cutting part 40 can be reduced compared to the case where air is always supplied to the air cylinder using an air hose (not shown) or the like (the case where air is supplied even when the slide member moves when cutting the film). can be achieved. Although the air supply to the air cylinder 45 is interrupted when the film 150 is cut, the time required for cutting is short and the air chamber is sealed. It is held and almost does not fluctuate.

Further, in the present embodiment, the opening/closing valve that closes when the plug 452 is separated from the socket 451 is provided, so that the air chamber of the air cylinder 45 can be sealed when the film 150 is cut.

In addition, in the present embodiment, every time the film 150 is cut, the biasing force is adjusted before the film 150 is cut, thereby suppressing fluctuations in the biasing force caused by air leakage or the like.

Further, in the present embodiment, since the rotary blade 44 is driven to rotate, it is possible to suppress the rotary blade 44 from being slid, thereby suppressing the uneven wear of the rotary blade 44 .

Further, in the present embodiment, a rack and pinion mechanism 48 is provided, and the driving force from the motor 47 that moves the slide member 42 is used to rotate the rotary blade 44 as the slide member 42 slides. The rotary blade 44 can be rotated.

Further, in this embodiment, the arm 43 is provided with the roller 431 and the guide member 46 for guiding the roller 431 of the arm 43 is provided. can be smoothly brought into contact with and separated from the receiving roller 21 . Therefore, unlike the case where the receiving roller is formed in a tapered shape, when the rotary blade is moved in the axial direction along the surface of the receiving roller, when the rotary blade moves from the tapered portion to the cylindrical portion (non-tapered portion), In addition, it is possible to prevent the inconvenience that the rotary blade collides with the receiving roller after it is temporarily separated from the receiving roller. This also prevents uneven wear of the rotary blade 44 .

Further, in the present embodiment, the rotary blade 44 is tilted at an angle θ with respect to the moving direction (X1 direction) so that the rotary blade 44 that is moved in the axial direction of the receiving roller 21 is positioned at the position of the rotary blade 44 with respect to the film 150 . Since it can be oriented in the scanning direction, cutting quality can be improved.

Further, in this embodiment, the cutting quality can be improved by setting the rotation speed of the rotary blade 44 so that the surface speed of the rotary blade 44 becomes the scanning speed V3 of the rotary blade 44 with respect to the film 150. can.

-Other embodiments-
In addition, the embodiment disclosed this time is an example in all respects, and does not serve as a basis for a restrictive interpretation. Therefore, the technical scope of the present invention is not to be interpreted only by the above-described embodiments, but is defined based on the claims. In addition, the technical scope of the present invention includes all modifications within the meaning and range of equivalence to the claims.

For example, in the above-described embodiment, an example in which two cores 50 are attached to the turret mechanism 11 is shown, but the present invention is not limited to this, and three or more cores may be attached to the turret mechanism.

Further, in the above-described embodiment, an example of winding the film 150 around the new core 50 using a hot-melt adhesive was shown, but the present invention is not limited to this, and other adhesives may be used to wind the film around the new core. may

Moreover, in the above-described embodiment, an example in which the hot-melt adhesive is applied to the new winding core 50 has been shown, but the hot-melt adhesive may be applied to the film without being limited to this.

Further, in the above embodiment, an example in which the value of the scanning speed V3 of the rotary blade 44 with respect to the film 150 is 400 m/min is shown, but this is not limiting, and the value of the scanning speed of the rotary blade with respect to the film is other than 400 m/min. may be The scanning speed of the rotary blade with respect to the film changes according to the transport speed of the film and the moving speed of the slide member.

Further, in the above-described embodiment, the value of the angle θ of the scanning direction of the rotary blade 44 with respect to the width direction of the film 150 is 30 degrees. may be other than 30 degrees. The angle of the scanning direction of the rotary blade with respect to the width direction of the film changes according to the transport speed of the film and the moving speed of the slide member.

Further, in the above-described embodiment, an example in which an on-off valve is provided in the air passage of the plug 452 is shown, but the present invention is not limited to this, and an on-off valve is provided in the air passage of the slide member (the air passage connecting the plug and the air cylinder). It may be provided, or an on-off valve may be provided in the air cylinder.

2 cutting mechanism 21 receiving roller 42 slide member 43 arm 44 rotary blade 45 air cylinder 46 guide member 48 rack and pinion mechanism 48a rack 48b pinion 150 film 431 roller 451 socket 452 plug 461 guide member 461a inclined surface 462 guide member 462a inclined surface

Claims (7)

A cutting mechanism for cutting the film being conveyed,
a rotary blade for cutting the film;
a receiving roller that receives the rotary blade;
an arm that rotatably supports the rotary blade;
a slide member provided with the arm rotatably and movable in the axial direction of the receiving roller;
an air cylinder provided on the slide member and biasing the arm,
When the slide member is moved in the axial direction, the rotary blade is rotated and the rotary blade is pressed against the receiving roller by the air cylinder, so that the conveying device wound around the receiving roller The film inside is configured to be cut by the rotary blade,
A socket for supplying air to the air cylinder is provided on the side where the slide member is positioned before the film is cut by the movement of the slide member,
The slide member is provided with a plug that can be fitted with the socket,
The air cylinder has an air chamber connected to the plug, and is configured such that an urging force that urges the arm can be adjusted by air pressure supplied to the air chamber,
When the slide member is positioned at the initial position, the plug is fitted into the socket, air is supplied to the air chamber, and the slide member is moved in the axial direction from the initial position, A disconnect mechanism, wherein the air chamber is sealed when the plug is removed from the socket. The cutting mechanism of claim 1, wherein
The plug has an air passage through which air flows and an on-off valve that opens and closes the air passage,
The open/close valve is configured to be opened when the plug is fitted in the socket and to be closed when the plug is separated from the socket. mechanism. 3. The cutting mechanism according to claim 1 or 2,
A cutting mechanism, wherein the biasing force of the air cylinder is adjusted each time the film is cut, and is adjusted before moving the slide member for cutting the film. In the cutting mechanism according to any one of claims 1 to 3,
A rack and pinion mechanism having a rack extending in the axial direction and a pinion rotatably provided on the slide member,
The pinion and the rotary blade are connected, and when the slide member is moved in the axial direction, the pinion meshing with the rack is rotated, thereby rotating the rotary blade. A cutting mechanism characterized by: In the cutting mechanism according to any one of claims 1 to 4,
guide members arranged at both ends in the axial direction for bringing the rotary blade into contact with and separating from the receiving roller;
The receiving roller is formed in a straight shape,
The guide member has an inclined surface that is inclined away from the receiving roller as it progresses outward in the axial direction,
A cutting mechanism, wherein the arm of the slide member is provided with a roller that abuts on the inclined surface of the guide member. In the cutting mechanism according to any one of claims 1 to 5,
The rotary blade is arranged so as to be inclined with respect to the axial direction so as to face the scanning direction of the rotary blade with respect to the film,
A cutting mechanism, wherein the rotation speed of the rotary blade is set so that the surface speed of the rotary blade is the scanning speed of the rotary blade with respect to the film. a rotary blade that cuts the film being transported;
a receiving roller that receives the rotary blade;
an arm that rotatably supports the rotary blade;
a slide member provided with the arm rotatably and movable in the axial direction of the receiving roller;
A cutting method performed by a cutting mechanism provided on the slide member and including an air cylinder for urging the arm,
moving the slide member in the axial direction and returning it to its initial position to fit a plug provided on the slide member into a socket for supplying air to the air cylinder;
adjusting the biasing force that biases the arm by supplying air to the air chamber of the air cylinder when the plug is fitted in the socket;
disengaging the plug from the socket and rotating the rotary blade by moving the slide member in the axial direction from the initial position;
an air chamber of the air cylinder is sealed when the plug is removed from the socket;
The rotary blade, which rotates as the slide member moves, is pressed against the receiving roller by the air cylinder, so that the rotary blade cuts the film wound around the receiving roller and being transported. A cutting method characterized by:

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