JP2020125168A - Film supply device - Google Patents

Abstract

To provide a film supply device with a simple structure at low cost.SOLUTION: A film supply device 20 comprises a rotatable rotation board 22, support shafts 31 and 32 attached to the rotation board 22 in a rotatable manner and supporting original fabric rolls 2 and 3 on which a film is wound, respectively, driven-side joint members 41 and 42 engaged to the support shaft 31 and 32, respectively, rotating on its axis by applying a torque to rotate the support shafts 31 and 32, respectively, revolving along the same circumference around a rotation axis of the rotation board 22 simultaneously with rotation of the rotation board 22, and configuring a magnet coupling, a driving-side joint member 54 arranged on revolution orbits of the driven-side joint members 41 and 42 and configuring the magnet coupling, and a feed driver 50 driving and rotating the driving-side joint member 54.SELECTED DRAWING: Figure 5

Description

The present invention relates to a film supply device for supplying a film.

The wrapping device is provided with a film supply device that supplies a film for wrapping that is wound around an original roll. As such a film supply device, there is a revolver type device (see Patent Documents 1 to 3). The revolver-type film supply device supports a plurality of original fabric rolls such that they can rotate, and also supports these original fabric rolls along the orbit of the same circle. When the film is supplied, the revolution of these original fabric rolls is stopped, and one original fabric roll located at a predetermined feeding position is rotated. Therefore, the film is fed from the original roll located at the feeding position. When the film of the original fabric roll located at the delivery position is exhausted, the rotation of the original fabric roll located at the delivery position is stopped, and the plurality of original fabric rolls revolve to position the other original fabric rolls at the delivery position. After that, the film roll is continuously supplied by the rotation of the original roll.

In the film supply device described in Patent Document 1, a clutch device is connected to each of the rotatable film support shafts that individually support the original rolls. By connecting the clutch device connected to the film support shaft supporting the original roll located at the feeding position and disconnecting the clutch device connected to the other film support shaft, only the original roll located at the feeding position Rotates by the power of the motor.

Japanese Patent No. 2584603 Japanese Patent No. 5883612 JP, 2005-112409, A

However, in the technique disclosed in Patent Document 1, a planetary gear mechanism is used as a power transmission mechanism from the motor to these clutch devices in order to utilize the plurality of clutch devices while allowing the film support shaft to revolve. Since the planetary gear mechanism and the clutch device are precise and expensive devices, the film supply device has a complicated structure and is more expensive.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film supply device having a simple structure at low cost.

In order to solve the above problems, the film supply device, a rotatable rotary disk, a plurality of support shafts that are mounted rotatably on the rotary disk and that respectively support the original roll around which the film is wound, The support shafts are respectively connected to the support shafts, and are rotated by receiving torque to rotate the support shafts respectively, and revolve along the same circle around the rotation axis of the turntable as the turntable rotates. A plurality of driven-side joint members that form a coupling, a drive-side joint member that is disposed on an orbit of the driven-side joint member and that forms a magnet coupling, and a drive that drives and rotates the drive-side joint member. And a machine.

According to the above, the driven side joint members revolve along with the rotation of the turntable, and any of the driven side joint members moves to the position coaxial with the drive side joint member. Since the driven-side joint member and the drive-side joint member form a magnetic coupling, when the drive machine rotates the drive-side joint member, the torque of the drive-side joint member is transmitted to the driven-side joint member, and the driven-side joint member. The support shaft linked to the member rotates about its axis. As a result, the film is fed from the original roll supported by the support shaft.

Since the driving machine is used as a power source for the plurality of support shafts, it is possible to provide a film supply device having a simple structure at low cost.
Further, since the magnetic coupling is used, the cutting operation of the magnetic coupling is not required before rotating the turntable when replenishing the original roll. Therefore, the structure of the power transmission unit from the drive unit to the support shaft can be simplified, and the film supply device can be provided at low cost.
Further, since the magnetic coupling is used, accurate positioning of the support shaft and the turntable is not required, and the film supply device can be provided at low cost.

According to the present invention, a film supply device having a simple structure can be provided at low cost.

It is a front view of a packaging device. It is a front view of a film supply apparatus. It is a rear view of a film supply apparatus. It is the perspective view which showed the front surface, right side surface, and upper surface of a film supply apparatus. FIG. 4 is a perspective view showing a rear surface, a left side surface and an upper surface of the film supply device. It is a left side view of a film supply device. It is a rear view of a lock mechanism. It is a rear view of a lock mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, since the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

1. Packing Device FIG. 1 is a schematic front view of the packing device 1.
The packaging device 1 includes a package supply device 11, a film supply device 20, a film joining machine 12, a roller 13, a dancer roller 14, a roller 15, a path length adjusting unit 16, rollers 17 and 18, and a packaging machine body 19.

The package supply device 11 is provided on the upstream side (left side in FIG. 1) of the packaging machine body 19. The package supply device 11 conveys the packages 6 arranged in the left-right direction in FIG. 1 to the right in FIG. 1, and transfers the packages 6 to the bag making machine 19 a of the packaging machine body 19. Supply in sequence.

The turret type film supply device 20 holds the original rolls 2 and 3, and continuously feeds the film 4 from one original roll 2. The other original roll 3 is for replenishment. When the amount of the film 4 wound on the original roll 2 becomes small, the film supply device 20 switches the positions of the original roll 2 and the original roll 3. The film 4 wound around the original roll 2 and the film wound around the original roll 3 are the same.

The film joining machine 12 and the rollers 13 to 15 are provided in the film supply device 20. The path length adjusting unit 16 is provided on the downstream side of the film supply device 20. The path length adjusting unit 16 has a plurality of upper rollers 16a and lower rollers 16b. When the lower roller 16b approaches the upper roller 16a upwards, the path length of the film 4 from the roller 15 to the roller 17 becomes short, and when the lower roller 16b separates downward from the upper roller 16a, the film 4 from the roller 15 to the roller 17 The route length becomes longer.

The rollers 17 and 18 are provided on the downstream side of the path length adjusting unit 16. The packaging machine body 19 is provided on the downstream side of the roller 18. The film 4 delivered from the original roll 3 passes through the film joining machine 12, the roller 13, the dancer roller 14, the roller 15, the path length adjusting unit 16, the roller 17 and the roller 18 in this order, and then forms the bag of the packaging machine body 19. Is supplied to the container 19a.

The packaging machine body 19 is, for example, a pillow packaging machine body. The wrapping machine body 19 is a device that sequentially wraps the article 6 to be wrapped with the film 4 to sequentially produce the wrapping 7. The packaging machine main body 19 includes a bag making machine 19a, a center sealing device 19b, and an end sealing device 19c in this order from the upstream. The bag-making device 19a is configured such that both sides (hereinafter, referred to as vertical stitches) of the film 4 passing through the bag-making device 19a are overlapped with each other, and the film 4 is rolled into a tubular shape so that the packaged object 6 is formed by the film 4. Wrap up. The article to be packaged 6 supplied to the bag making machine 19a by the article to be packaged supply device 11 is conveyed downstream together with the film 4 on the outside thereof. The center seal device 19b seals the vertical stitches of the film 4. The end seal device 19c forms a horizontal stitch by sealing a portion of the film 4 between the adjacent articles 6 to be packaged, and cuts the horizontal stitch.

When the film 4 wound around the original roll 2 remains sufficiently, the film length is adjusted by the path length adjusting unit 16 while keeping the path length of the film 4 from the roller 15 to the roller 17 constant. Supply 4. Therefore, the packages 7 are sequentially produced by the packaging machine body 19.

On the other hand, when the film 4 wound on the original roll 2 becomes very small, the film joining machine 12 cuts the film 4 of the original roll 2 and holds the end of the film 4 after cutting. Then, after the film supply device 20 exchanges the positions of the original fabric roll 2 and the original fabric roll 3, the film is fed from the original fabric roll 3 to the film joining machine 12. After that, the film joining machine 12 cuts the film of the original fabric roll 3, and then joins the leading end of the film and the end of the previous film 4. During such a series of operations, while the path length adjusting unit 16 shortens the path length of the film 4 from the roller 15 to the roller 17, the film 4 is fed from the path length adjusting unit 16 to the roller 17 accordingly. Therefore, the flow of the film 4 stops upstream of the roller 15, but the flow of the film 4 does not stop downstream of the roller 17.

The film joining machine 12 and the path length adjusting unit 16 may not be provided.

2. Film Supply Device The film supply device 20 will be described with reference to FIGS. FIG. 2 is a front view of the film supply device 20. FIG. 3 is a rear view of the film supply device 20. FIG. 4 is a perspective view showing the film supply device 20 as viewed from the front, from above and from the right. FIG. 5 is a perspective view showing the film supply device 20 as viewed from the back, from above and from the left. FIG. 6 is a left side view showing the film supply device 20 as viewed from the left. Here, the left and right directions are determined by viewing the film supply device 20 from the front, as indicated by the arrows in FIGS. 1 and 2.

The film supply device 20 includes a machine frame 21, a turntable 22, a turntable drive 60, support shafts 31 and 32, speed reducers 33 and 34, and coupling members 41 and 42 on the driven side of the magnetic coupling. The drive coupling member 54 of the magnet coupling, the feed driving machine 50, and the lock mechanism 70 are provided.

2-1. Machine frame A circular opening 21a is formed on the front surface of the machine frame 21. Although the machine frame 21 is provided in a box shape and has a space inside, the illustration of the upper surface, the rear surface, the left side surface, and the right side surface of the machine frame 21 is omitted to illustrate the inside of the machine frame 21.

2-2. Rotating disc A circular rotating disc 22 is fitted in the opening 21a. Inside the machine frame 21, a plurality of guide rollers 21b are provided along the edge of the opening 21a, and the peripheral surface of the turntable 22 is slidably supported by the guide rollers 21b with respect to the guide rollers 21b. There is. As a result, the turntable 22 becomes rotatable about the rotation axis passing through the geometric center of gravity thereof and is supported by the machine frame 21. The rotating shaft of the turntable 22 is horizontal.

The direction of rotation of the turntable 22 may be limited to one by the ratchet mechanism. Specifically, as shown in FIG. 2, when the front of the machine frame 21 is viewed from the front, the rotation direction of the turntable 22 is restricted to clockwise, and the turntable 22 cannot rotate counterclockwise. Good. The ratchet wheel of the ratchet mechanism is provided on the turntable 22, and the claws that fit the teeth of the ratchet wheel are swingably attached to the machine frame 21.

2-3. Rotary Disc Drive Machine The rotary disc drive machine 60 drives and rotates the rotary disc 22. The turntable driver 60 has a motor 61, a gear 62, and a gear 63.

The motor 61 is attached to the machine casing 21 around the rotary disk 22 inside the machine casing 21. The gear 62 is directly connected to the output shaft of the motor 61. The tooth row of the gear 63 is provided on the peripheral surface of the turntable 22. The gear 62 meshes with the tooth row of the gear 63, and the power of the motor 61 causes the turntable 22 to rotate.

2-4. Support shaft The support shafts 31 and 32 are attached to the turntable 22 by bearings or the like so as to be rotatable. The support shafts 31 and 32 are provided parallel to the rotation axis of the rotary disc 22 and penetrate the rotary disc 22 in the front-rear direction. The distance between the support shaft 31 and the rotation axis of the turntable 22 is equal to the distance between the support shaft 32 and the rotation axis of the turntable 22. The support shaft 31 and the support shaft 32 are arranged along the same circle centering on the rotation axis of the rotary disk 22 with a center angle of 180° between the support shafts 31 and 32. Since the support shafts 31 and 32 are attached to the turntable 22, the support shafts 31 and 32 revolve along the same circular orbit as the turntable 22 rotates.

The original rolls 2 and 3 are mounted on the support shafts 31 and 32. The support shaft 31 is provided with a mechanism for locking the original fabric roll 2 on the support shaft 31 and preventing the original fabric roll 2 from falling off the support shaft 31. The same applies to the support shaft 32.

Inside the machine frame 21, a gear base 23 is attached to the turntable 22 by a plurality of columns 24. Therefore, the gear base 23 and the turntable 22 rotate integrally. The support shafts 31, 32 are attached to the gear base 23 by being rotatable by bearings or the like.

2-5. Reduction Gear The reduction gear 33 connects a joint member 41, which will be described later, and the support shaft 31. Specifically, the speed reducer 33 decelerates the rotation of the joint member 41 and outputs (transmits) the rotation torque of the joint member 41 to the support shaft 31.

The reduction gear 33 has a large gear 35 and a small gear 37. The large gear 35 is attached to the end of the support shaft 31 in the machine frame 21. A small gear 37 meshes with the large gear 35. The small gear 37 is rotatably attached to the gear base 23.

The speed reducer 34 connects a joint member 42, which will be described later, with the support shaft 32. Specifically, the speed reducer 34 decelerates the rotation of the joint member 42 and outputs (transmits) the rotation torque of the joint member 42 to the support shaft 32.

The reduction gear 34 has a large gear 36 and a small gear 38. The large gear 36 is attached to the end of the support shaft 32 in the machine frame 21. A small gear 38 meshes with the large gear 36. The small gear 38 is rotatably attached to the gear base 23.

The small gear 37 and the small gear 38 are arranged along the same circle centering on the rotation axis of the rotating disk 22 with a center angle of 180° between the small gears 37 and 38. Similar to the support shafts 31 and 32, the small gears 37 and 38 revolve along the same circular orbit as the turntable 22 rotates.

2-6. The driven-side joint member 41 of the magnet coupling is attached to the small gear 37 so as to be coaxial with the small gear 37. Therefore, the joint member 41 can rotate together with the small gear 37. The joint member 41 constitutes a butt type magnet coupling. The joint member 41 has a plurality of permanent magnets. For example, the S-pole permanent magnets and the N-pole permanent magnets are arranged in a staggered arrangement, and these permanent magnets are arranged in the circumferential direction. The magnetic coupling is also called a non-contact magnetic coupling.

The joint member 42 is attached to the small gear 38 so as to be coaxial with the small gear 38. Therefore, the joint member 42 can rotate together with the small gear 38. The joint member 42 is the same as the joint member 41 and constitutes a butt type magnet coupling.

Similar to the support shafts 31 and 32, the joint members 41 and 42 revolve along the same circular orbit as the turntable 22 rotates.

2-7. Feed Drive Machine The feed drive machine 50 drives and rotates a joint member 54 described later. The feed driver 50 has a feed motor 51, a gear 52, and a gear 53.
The feed motor 51 is attached to the machine frame 21 via a base 59 in the vicinity of the turntable 22 inside the machine frame 21. The mounting position of the feed motor 51 is at the upper right of the rotary disc 22 when viewed from the front of the front of the machine frame 21, and at the upper left of the rotary disc 22 when viewed from the rear of the front of the machine frame 21. The output shaft of the feed motor 51 is provided with a gear 52, and the gear 52 meshes with the gear 53. The gear 53 is rotatably attached to the base 59.

2-8. The drive side joint member of the magnet coupling The disc type joint member 54 is attached to the gear 53 so as to be coaxial with the gear 53. The joint member 54 is a pair with the joint members 41 and 42, and constitutes a butt type magnet coupling. The joint member 54 and the gear 53 are arranged on a circle around the rotation axis of the rotary disk 22 (this circle is the orbit of the small gears 37, 38 and the joint members 41, 42). Therefore, when the joint member 41 or the joint member 42 moves to a position coaxial with the joint member 54 due to the rotation of the turntable 22, the joint member 41 or the joint member 42 faces the joint member 54. Then, the torque of the feed motor 51 is transmitted from the joint member 54 to the joint member 41 or the joint member 42.

2-9. Lock Mechanism FIGS. 7 and 8 are rear views of the lock mechanism 70.
The lock mechanism 70 locks and unlocks the turntable 22. When the turntable 22 is locked and locked by the lock mechanism 70, the turntable 22 is prevented from rotating. When the turntable 22 is unlocked and released by the lock mechanism 70, the turntable 22 becomes rotatable.

The installation position of the lock mechanism 70 is the lower left of the turntable 22 when viewed from the front of the front of the machine frame 21, and the lower right of the turntable 22 when viewed from the rear of the front of the machine frame 21. The lock mechanism 70 includes a swing rod 71, a latch 72, a power transmission mechanism 73, and an actuator 74.

The base end of the swing rod 71 is rotatably connected to the bottom of the machine frame 21 inside the machine frame 21, and the swing rod 71 is provided so as to be vertically swingable with the base end as a fulcrum. ..

The latch 72 is attached to the tip of the swing rod 71.

The actuator 74 is an air cylinder, a solenoid, or a hydraulic cylinder, and a plunger (also referred to as a rod or a piston) 74b of the actuator 74 moves forward/backward by pneumatic pressure, electromagnetic force, or hydraulic pressure. A base end portion 74a of the actuator 74 is rotatably connected to the bottom portion of the machine frame 21 inside the machine frame 21, and the actuator 74 is provided to be vertically swingable with the base end portion 74a as a fulcrum.

The power transmission mechanism 73 is connected between the plunger 74b of the actuator 74 and the tip of the swing rod 71. The power transmission mechanism 73 is a link mechanism having links 73a and 73b. One end of the link 73a is rotatably connected to the tip of the plunger 74b of the actuator 74, the middle part of the link 73a is rotatably connected to the machine frame 21, and the other end of the link 73a is connected to one end of the link 73b. The link 73b is rotatably connected, and the other end of the link 73b is rotatably connected to the tip of the swing rod 71.

The power transmission mechanism 73 swings the swing rod 71 up and down by the power of the actuator 74. Specifically, as shown in FIG. 7, when the plunger 74b of the actuator 74 advances, the swing rod 71 is swung down by the power transmission mechanism 73. Therefore, the latch 72 is located outside the circular orbits of the joint members 41, 42 and the small gears 37, 38 about the rotation axis of the turntable 22. As a result, the turntable 22 is unlocked.

On the other hand, as shown in FIG. 8, when the plunger 74b of the actuator 74 retracts, the swing rod 71 is swung up by the power transmission mechanism 73. Therefore, the latch 72 is positioned on the circular orbits of the joint members 41, 42 and the small gears 37, 38 about the rotation axis of the rotary disk 22. At this time, if the joint member 41 is positioned so as to be coaxial with the joint member 54, the latch 72 engages with the joint member 42, the pinion gear 38, or these shafts, and the joint member 42 becomes coaxial with the joint member 54. If so, the latch 72 engages the joint member 41 or the pinion gear 37 or their shafts. As a result, the turntable 22 is locked.

2-10. Operation of Film Supply Device The operation of the film supply device 20 will be described.

As shown in FIG. 2, when viewed from the front of the front surface of the machine frame 21, the support shaft 31 is located at the upper right feeding position, and the support shaft 32 is located at the lower left standby position. In that case, the joint member 41 is coaxial with the joint member 54, and the joint member 41 faces the joint member 54. Therefore, the torque of the feed motor 51 is transmitted from the joint member 54 to the joint member 41, the rotation of the joint member 41 is decelerated by the reduction gear 33 and transmitted to the support shaft 31, and the support shaft 31 and the original roll mounted on the support shaft 31. 2 is driven and rotates. As a result, the film 4 is fed from the original roll 2.

During the feeding of the film 4, the swing rod 71 is swung up by the actuator 74 and the power transmission mechanism 73, and the latch 72 is engaged with the joint member 42 or the pinion gear 38 or their shafts. Therefore, the turntable 22 is locked and rotation of the turntable 22 is prevented.

During the feeding of the film 4, the operator can mount the original roll 3 on the support shaft 32. Since the support shaft 32 is located at the standby position lower than the feeding position, the work of mounting the original roll 3 is easy.

While the film 4 is being fed out, the remaining amount of the film 4 wound on the original roll 2 is detected by the sensor. When the detected remaining amount becomes equal to or less than the predetermined threshold value, the feed motor 51 stops. Then, as described above, the film joining machine 12 cuts the film 4 of the original roll 2 and holds the end of the film 4 after cutting.

After that, the swing rod 71 is swung down by the actuator 74 and the power transmission mechanism 73, and the latch 72 is disengaged from the joint member 42, the pinion gear 38, or their shafts. Then, the motor 61 operates and the turntable 22 rotates. When the joint member 42 revolves to a position where it is coaxial with the joint member 54 with the rotation of the turntable 22, the joint member 42 faces the joint member 54.

Thereafter, the swing rod 71 is swung up by the actuator 74 and the power transmission mechanism 73, and the latch 72 is engaged with the joint member 41, the pinion gear 37, or their shafts. As a result, the turntable 22 is locked.

After that, the feed motor 51 operates. Therefore, the torque of the feed motor 51 is transmitted from the joint member 54 to the joint member 42, the rotation of the joint member 42 is reduced by the speed reducer 34 and transmitted to the support shaft 32, and the support shaft 32 and the original roll mounted on the support shaft 32. 3 is driven and rotates. As a result, the film is fed from the original roll 3. Immediately after starting the feeding of the film from the original roll 3, the film joining machine 12 cuts the film of the original roll 3, and then joins the leading end of the film and the end of the previous film 4.

An operator can easily attach the original fabric roll 2 to the support shaft 31 during the feeding of the film from the original fabric roll 3.

After that, when the remaining amount of the film on the original roll 3 becomes less than or equal to a predetermined threshold, the feed motor 51, the actuator 74, and the motor 61 perform the same operation as when the remaining amount of the film 4 on the original roll 2 becomes less than or equal to the predetermined threshold. Operate.

3. Advantageous Effect (1) Since the single motor 61 is used as the power source for both the support shafts 31 and 32, the film supply device 20 has a simple structure. Accordingly, the film supply device 20 can be manufactured at low cost.

(2) Since the non-contact type magnetic coupling is used, accurate positioning of the support shafts 31, 32, the turntable 22, etc. is not required, and the film supply device 20 can be manufactured at low cost. For example, when the joint member 41 and the joint member 54 face each other, even if misalignment (declination error, clearance error, parallel error, eccentricity error) occurs between the joint member 41 and the joint member 54, the torque is reduced. It is transmitted from the joint member 54 to the joint member 41. The same applies to the case where the joint member 42 and the joint member 54 face each other.

(3) Since the non-contact type magnetic coupling is used, the cutting operation of the magnetic coupling is not required before the rotation of the turntable 22. Therefore, the structure of the power transmission unit from the feed motor 51 to the support shaft 31 or the support shaft 32 is simplified. Accordingly, the film supply device 20 can be manufactured at low cost.

(4) Since the non-contact type magnetic coupling has a torque limiter function, even if an unexpected overload occurs, the overload does not act on the feed motor 51. Therefore, the feed motor 51 can be protected.

(5) When the support shaft 31 or the support shaft 32 is located at the lower left standby position, the original roll can be replenished to the support shaft 31 or the support shaft 32. At that time, it is not necessary to lift the original roll high, and the burden of replenishing the original roll is reduced.

(6) Since the original roll can be replenished while the film is being supplied, the film can be continuously supplied.

4. Modification (1) In the above embodiment, the two support shafts 31 and 32 are attached to the turntable 22. On the other hand, three or more support shafts may be attached to the turntable 22. In this case, these support shafts are arranged at equal intervals along the same circle centered on the rotation axis of the turntable 22. The output of a speed reducer similar to the speed reducers 33 and 34 is connected to each support shaft, and a joint member similar to the joint members 41 and 42 is provided at the input of each speed reducer. When the number of support shafts is N, the rotation angle of the turntable 22 when refilling the original roll is 360°/N.

(2) In the above embodiment, the turntable 22 is rotated by the power of the motor 61. On the other hand, an operator may manually rotate the turntable 22.

(3) In the above embodiment, the engagement and disengagement of the latch 72 is performed by the power of the actuator 74. On the other hand, an operator may manually engage and disengage the latch 72. In this case, the latch 72 or the swing rod 71 is fixed by a fastener so that the latch 72 can be maintained in the state of being engaged with the joint member 41 or the pinion gear 37 or these shafts. Similarly, it allows the latch 72 to remain engaged with the coupling member 42 or the pinion 38 or their shafts.

(4) In the above embodiment, the lock mechanism 70 indirectly locks the rotation of the turntable 22. On the other hand, the lock mechanism 70 may directly lock the turntable 22.

(5) The driven side joint member 41 may be directly connected to the support shaft 31, and the driven side joint member 42 may be directly connected to the support shaft 32.

(6) The driving-side joint member 54 may be directly connected to the output shaft of the feed motor 51.

(7) In the above embodiment, the speed reducers 33 and 34 are gear transmission mechanisms. On the other hand, the speed reducers 33 and 34 may be another type of transmission mechanism, for example, a winding transmission mechanism.

(8) At least two of the modifications of (1) to (7) may be combined and applied.

2, 3... Original roll 20... Film supply device 22... Rotating plate 31, 32... Support shaft 41, 42... Follower side joint member 50... Feed drive machine 51... Feed motor 54... Drive side joint member

Claims (2)

A rotatable turntable,
A plurality of support shafts each of which is attached to the turntable so as to be rotatable and which respectively supports an original roll around which a film is wound,
The support shafts are respectively connected to the support shafts, and are rotated by receiving torque to rotate the support shafts respectively, and revolve along the same circle about the rotation axis of the rotation plate as the rotation plate rotates. A plurality of driven side joint members that configure the coupling,
A drive-side joint member that is disposed on the revolution path of the driven-side joint member and that constitutes a magnet coupling,
A drive machine that drives and rotates the drive-side joint member,
A film supply device including. The film supply device according to claim 1, further comprising a lock mechanism capable of locking and unlocking rotation of the turntable.

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