JP2945802B2 - Sheet unwinding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a synthetic resin film, paper,
The present invention relates to an unwinder that feeds a sheet-like material such as an aluminum foil or a cloth at a predetermined speed.

[0002]

2. Description of the Related Art Generally, when a sheet-like material such as a synthetic resin film, paper, aluminum foil, or a fabric is continuously supplied to a processing apparatus, it is rotatably mounted on a machine base 51 as shown in FIG. A turret member 52, a turret 53, 54 rotatably attached to the turret member 52, and a turret comprising a turret member rotation drive mechanism 56 and a chuck rotation drive mechanism 57, 58. A type unwinder is installed.

In the case of the above-mentioned unwinder, when the sheet rolls 70, 71 are supplied to the chucks 53, 54, respectively, and tightened, the chuck rotation drive mechanism 57 is operated to be at the sheet feeding position. Check 53 and sheet roll 7
0 is rotated to perform a sheet-like material sending operation. Then, when the remaining amount of the sheet-like material on the sheet roll 70 decreases, a remaining amount detection sensor (not shown) is activated, and a sheet-like material of a predetermined length is stored by a storage device (not shown) such as a dancer roll. Then, the chuck rotation drive mechanism 57
Is activated, the rotation of the chuck 53 and the sheet roll 70 is stopped, and the sheet-like material of the sheet roll 70 on the sending side and the sheet-like material of the sheet roll 71 on the full winding side are connected. When the connection operation of the sheet-like object is completed, the chuck rotation drive mechanism 58 is immediately activated to stop the chuck 54 and the sheet roll 71 from a stopped state at a predetermined sending speed (150 to 200).
m / min), and the sheet-like material is sent out.

The above-mentioned sheet roll has a diameter of 500 to 1000 mm at the start of unwinding of the sheet material and a diameter of about 100 mm at the end of unwinding. The rotation speed of the output shaft changes 5 to 10 times. When the change in the rotational speed is large, there is a restriction that the reduction ratio cannot be increased due to the characteristics of the electric motor.

[0005] Therefore, the diameter dimension is 500 to 1000 m
In order to quickly start a sheet roll having a length m from a stopped state to a predetermined delivery speed, a motor having a capacity about 5 to 10 times that of a motor having a capacity required for a sheet-like material delivery operation is installed. There is a need. Further, when an electric motor having a capacity necessary for a sheet-like material sending operation is installed, a rise time is long, and it is necessary to install a storage device capable of storing a very long sheet-like material.

In place of the above-mentioned turret type unwinder, two unwinders supporting one sheet roll are installed, and the end portion of the sheet-like material having a reduced remaining amount and the sheet-like material on the full winding side are provided. The same problem arises when the tip is connected and supplied.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an operation for connecting a sheet-like material to start a sheet roll from a stopped state to a predetermined sheet-like material sending speed. The point is that a storage device capable of storing objects must be provided, or a large-capacity electric motor must be provided to quickly start a heavy-weight, large-volume sheet roll at a predetermined speed.

[0008]

According to the present invention, there is provided a sheet unwinding machine comprising: a driving device for rotating a chuck; a delivery driving mechanism; a start-up driving mechanism; The one-way clutch switches the drive system of the chuck from the start-up drive mechanism to the delivery drive mechanism.

Further, it is preferable that the turret type unwinder has a plurality of chucks rotatably mounted on a turret member rotatably installed on the machine base.

[0010]

FIG. 1 is a schematic view showing an embodiment of a sheet unwinding machine according to the present invention. In the drawing, the unwinding machine is rotatably mounted on a machine base 1 by bearings. A turret member 2,
A first chuck 3, a second chuck 4, which is rotatably attached to the turret member 2, a turret member rotating drive 5, a first chuck rotating drive 6, and a second
And a drive device 7 for rotating the chuck.

The above-described first chuck rotation drive device 6
The first transmission drive mechanism 8 and the first start-up drive mechanism 10 are provided.
The driving mechanism 9 includes a sending drive mechanism 9 and a second starting drive mechanism 11.

The turret member rotation driving device 5 described above is rotatably mounted on the machine base 1 by bearings with a worm gear 12 integrally attached to the end of the turret member 2 and meshed with the worm gear 12. Worm gear 1
3, a sprocket 15 integrally mounted on the worm gear 13, an electric motor 17 with a drive reduction mechanism having a sprocket 14 mounted on the output shaft, and a sprocket 1
4 and 15, and a chain 16. Then, when the motor 17 with the speed reduction mechanism is operated, the turret member 2 rotates by 180 °, and the chuck at the delivery position moves to the standby position, and the chuck at the standby position moves to the delivery position.

The above-mentioned first delivery drive mechanism 8 includes a sprocket 18 integrally attached to the first chuck 3 and a hollow shaft body 19 rotatably supported on the machine base 1 by bearings.
A sprocket 20, 21 attached to both ends of the hollow shaft body 19, an electric motor 22 for driving having a sprocket 23 attached to an output shaft, a chain 24 bridged over the sprockets 18, 20, a sprocket, And a chain 25 bridged between 21 and 23.

The second delivery drive mechanism 9 includes a sprocket 26 integrally mounted on the second chuck 4 and a shaft 2 rotatably supported by a bearing in the hollow shaft 19.
7, a sprocket 28, 29 attached to both ends of the shaft 27, an electric motor 30 for driving having a sprocket 31 attached to the output shaft, a chain 32 bridged over the sprockets 26, 28, and a sprocket. And a chain 33 extending between the chains 29 and 31.

A first one-way clutch 34 is mounted on the output shaft of the motor 22 and a second one-way clutch 35 is mounted on the output shaft of the motor 30.

The first starting drive mechanism 10 includes a sprocket 36 attached to the first one-way clutch 34 described above.
, A motor 37 with a speed reduction mechanism having a sprocket 38 attached to the output shaft, and a chain 42 spanned over the sprockets 36, 38.
1 is a sprocket 39 attached to the above-described second one-way clutch 35, a motor 40 with a speed reduction mechanism having a sprocket 41 attached to the output shaft, and sprockets 39, 4
1 and a chain 43 wound around the chain.

Instead of the combination of the sprocket and the chain described above, a configuration in which a toothed pulley and a toothed belt or a gear is combined may be used.

The above-described motors 17, 37, 4 with a speed reduction mechanism
The motors 22 and 30 are controlled based on operation command signals from a control device (not shown) such as a microcomputer having an input function, a storage function, a comparison operation function, an operation command function, and the like.

In the above-described sheet unwinding machine, when the first chuck 3 on the side of the sheet roll 70 is raised from the stop state to a predetermined delivery speed in order to start the delivery of the sheet-like material, the control device ( When a start signal is sent from a motor (not shown) to the electric motor 22 of the first transmission drive mechanism 8, the first chuck 3 rotates and rises to the transmission speed.

If the first chuck 3 is to be started up to the sending speed in a short time, a start signal is sent from a control device (not shown) to the motor 37 with a speed reduction mechanism of the first starting drive mechanism 10. The output shaft rotates and the first one-way clutch 3
4 drives the hollow shaft body 19 to rotate the sheet roll 70 together with the first chuck 3. When a predetermined time elapses after the motor 37 with the speed reduction mechanism is started, a start signal is sent from the control device (not shown) to the motor 22 of the first transmission drive mechanism 8, and the rotation speed of the sheet roll 70 is set to the connection operation. Get up to speed. Then, a speed increase signal is sent from the control device (not shown) to the electric motor 22, and the first chuck 3 driven by the electric motor 37 with the speed reduction mechanism is increased in speed by the electric motor 22 and rises to a predetermined sending speed.

When the remaining amount of the sheet-like material on the sheet roll 70 is reduced and a remaining amount detection sensor (not shown) is activated, a control device (not shown) stores a dancer roll or the like for storing the sheet-like material. When a storage start signal is sent to a device (not shown) and a sheet of a predetermined length is stored,
A deceleration signal is sent from a control device (not shown) to the electric motor 22 of the first transmission drive mechanism 8, and the first chuck 3 and the sheet roll 70 decelerate to the connection operation speed.

On the other hand, when the remaining amount detection sensor (not shown) is activated, a start signal is sent from the control device (not shown) to the motor 40 with the speed reduction mechanism of the second start-up drive mechanism 11, and the output shaft rotates. I do. Then, the shaft 27 is driven by the second one-way clutch 35, and the sheet roll 71 rotates together with the second chuck 4. After a predetermined time has elapsed since the start of the motor 40 with the speed reduction mechanism, a start signal is sent from the control device (not shown) to the motor 30 of the second transmission drive mechanism 9 to connect the rotation speed of the sheet roll 71. When the operation speed rises, the connection operation mechanism (not shown) operates to connect the rear end of the sheet-like material of the sheet roll 70 and the leading end of the sheet-like material of the sheet roll 71. Then, the sheet-like material connected to the sheet roll 70 is immediately cut by a cutting mechanism (not shown). When the connection operation is completed, a speed increase signal is sent from a control device (not shown) to the electric motor 30, and the driving system of the second chuck 4 driven by the electric motor 40 with the reduction mechanism is switched, and the speed of the second chuck 4 is increased by the electric motor 30. Then, the sheet-like material is sent out by rising to a predetermined sending speed.

When the connection operation described above is completed, the turret member rotation driving device 5 is operated, and the turret member 2 is moved
The sheet roll 70 that has been rotated by 0 ° and has been at the delivery position moves to the standby position, and the sheet roll 71 that has been at the standby position moves to the delivery operation position for the sheet.

When the operation of connecting the sheet-like material to the first chuck 3 on the sheet roll 70 is completed, a rotation stop signal is sent from a control device (not shown) to the electric motor 22 of the first sending drive mechanism 8. And stop.

In the sheet unwinding machine described above, the capacity of the electric motors 37, 40 with the speed reduction mechanism of the start-up drive mechanisms 10, 11 is 1.8 (KW) and the number of revolutions is 1500 (RP.
M), using a servo motor with a rated torque of 1.17 (Kg · F · m) and reducing the reduction ratio of the reduction mechanism to 1/10, it can start up from a stopped state to 100 m / min in about 0.54 seconds. Can be. When the connection operation of the sheet-like object is performed, the servomotors (start-up drive mechanisms 10, 1) installed as the electric motors 22, 30 of the delivery drive mechanisms 8, 9 are operated.
(Servo motors having the same specifications as those of the motors 37 and 40 with the speed reduction mechanism 1), the amount of storage installed in the storage device (not shown) from the state of 100 m / min to the sending speed of the sheet-like material of 150 to 200 m / min. Speed increase control can be performed by a signal from the detection sensor.

As in the case of the conventional unwinding machine, one servo motor (the motor 3 with the speed reduction mechanism of the start-up driving mechanisms 10 and 11)
If the motor is raised from the stop state to the sheet-like material sending speed by the servo motor having the same specification as that of the servomotors 7 and 40),
Since the reduction ratio cannot be increased due to the characteristics of the servo motor, it takes approximately 6.43 to start up to 100 m / min.
It takes seconds, and if it is attempted to start within one second, a servomotor having a capacity of 6 to 7 times is required.

Therefore, only by installing two small-capacity servomotors for the start-up and the sending-out, the connection operation speed and the sending-out speed can be set up in a short time, and the short sheet-like material is stored. It becomes possible to install a storage device.

[0028]

According to the sheet unwinding machine of the present invention, the driving device sends the driving mechanism for sending out, the driving mechanism for starting up, and the driving system of the chuck from the driving mechanism for starting up. And a one-way clutch that switches to a driving mechanism for the vehicle, so that the driving mechanism with a small capacity can quickly start up from a stopped state to a predetermined sheet-like object sending speed by a small-capacity driving mechanism. The connection operation of the sheet material can be performed without changing.

In a turret type unwinder in which a plurality of chucks are rotatably mounted on a turret member rotatably mounted on the machine base as in claim 2, the unwinder supports one sheet roll. Can be made more compact and the installation area can be made smaller than when two are installed.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing one embodiment of a sheet unwinder according to the present invention.

FIG. 2 is a view taken in the direction of arrows ZZ in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Machine base 2 Turret member 3 1st hack 4 2nd hack 5 Turret member rotation drive 6 First hack rotation drive 7 2nd hack rotation drive 8 1st delivery drive mechanism 9 2nd delivery drive Mechanism 10 First startup drive mechanism 11 Second startup drive mechanism 12, 13 Worm gear 14, 15, 18, 20, 21, 23, 26, 28, 2
9, 31, 36, 38, 39, 41 Sprockets 16, 24, 25, 32, 33, 42, 43 Chain 17, 37, 40 Electric motor with reduction mechanism 19 Hollow shaft body 22, 30 Electric motor 27 Shaft body 34 Direction clutch 35 Second one-way clutch

Claims (2)

(57) [Claims] 1. An unwinder comprising: a sheet roll tightening chuck rotatably mounted on a machine base; and a driving device for rotating the chuck.
A sheet-like unwinding machine comprising a delivery drive mechanism, a startup drive mechanism, and a one-way clutch that switches the drive system of the chuck from the startup drive mechanism to the delivery drive mechanism. . 2. The unwinding machine according to claim 1, wherein said unwinding machine is a turret type unwinding machine having a plurality of chucks rotatably mounted on a turret member rotatably mounted on a machine base. Machine.