JP2000218427A - Web cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web cutter to be manufactured at a low cost and capable of affording the highly accurate width dimension of an narrow web cut out of a wide web. SOLUTION: An ear carrier 70 for carrying out a cut ear 66 is provided with an ear carrier roller 72 and a nip roller 84 pressed to the ear carrier roller 72 by a cylinder 94. The ear carrier roller 72 is rotated at peripheral speed higher by 0.5 to 5.0% than that for a rotary cutter 24 for cutting a wide web 12. The pressure of the nip roller 84 to press the ear carrier roller 72 is controlled by adjusting the pressure of air supplied to the cylinder 94 by a regulator. The ear carrier roller 72 and the rotary cutter 24 are driven by the same motor 38 via first and third reduction mechanisms 44 and 82 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web cutting apparatus for obtaining a narrow web having a desired width by cutting a wide web, and more particularly, to obtaining a high-precision cutting width of the narrow web. Web cutting device.

[0002]

2. Description of the Related Art Generally, a cutting apparatus for cutting a wide web such as a film, a paper, a metal foil or the like to obtain a narrow web having a desired width is designed so that the wide web is continuously cut by a rotary blade. It is configured.

Further, the cutting device is provided with an ear carrying device for carrying out an ear generated at the time of the cutting. Conventionally, this ear carrying device is configured to nip and convey the ear by a conveying roller and a nip roller (see, for example, JP-A-8-257990).

By the way, when the wide web is cut by the rotary blade to obtain a narrow web, a predetermined tension is applied to the ear by the ear discharging device in order to obtain a highly accurate width dimension of the narrow web. There is a need.

[0005] This is because, for example, when no tension is applied to the ears or when a tension equal to or more than a predetermined value is applied to the ears, the wide web reaching the rotary blade bends, and the obtained narrow web is bent. This is because the accuracy of the width dimension of the hologram decreases.

As described above, an ear take-out device capable of applying a predetermined tension to the ear (hereinafter referred to as an ear take-out device according to the prior art) is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-6126. .

[0007] In this ear transporting device according to the prior art, a nip roller is pressed against a transport roller by a cylinder with a constant pressure, and a motor for rotating the transport roller is connected to the transport roller via a clutch. . In this case, a desired tension can be applied to the ear by changing the exciting current of the clutch.

[0008]

However, in the above-described ear ejection device according to the prior art, a cylinder is attached to the nip roller and a clutch is provided between the transport roller and the motor in order to apply a desired tension to the ear. It is configured as follows. Providing the clutch in this way increases the manufacturing cost of the ear carrying device.

Furthermore, since the motor is always rotated at a constant speed and the tension applied to the ears is set by controlling the exciting current of the clutch, when the cutting operation of the wide web is stopped, There is a concern that the slip rotation speed will increase and the amount of heat generated from the clutch will increase.

The present invention has been made to overcome the above disadvantages, and can be manufactured at low cost.
Moreover, it is an object of the present invention to provide a web cutting device capable of obtaining a highly accurate width dimension of a narrow web cut from a wide web.

[0011]

According to the present invention, there is provided a web cutting apparatus, comprising: a rotary blade for cutting a running wide web along a running direction to obtain a narrow web having a desired width; Ear carrying means for carrying out the cutting ears, wherein the ear carrying means is an ear carrying roller that rotates in a direction in which the cutting ears are carried out, and the ear carrying roller sandwiches the cutting ears between the ear carrying rollers. A nip roller that rotates with the ear transport roller, and a nip roller pressing mechanism that presses the nip roller against the ear transport roller with a predetermined pressure,
The peripheral speed of the ear conveying roller is set higher than the peripheral speed of the rotary blade (the invention according to claim 1).

Further, the nip roller pressing mechanism is configured to adjust a pressure of air supplied to the cylinder and a cylinder for displacing the nip roller in a direction approaching the ear transport roller or in a direction away from the ear transport roller. A regulator for controlling a pressure by which the nip roller presses the ear conveyance roller (the invention according to claim 2).

Further, the peripheral speed of the ear transport roller is set to be 0.5% to 5% higher than the peripheral speed of the rotary blade (the invention according to claim 3).

In this case, a predetermined tension can be applied to the cutting ear by adjusting the pressure at which the nip roller presses the ear conveying roller. For this reason, it is avoided that an error occurs in the width dimension of the narrow web, such as when the tension applied to the cutting ear is released or when the tension is increased. Therefore, when the narrow web is, for example, a movie film or a photographic negative film, excellent image quality can be obtained.

Further, since the rotary blade and the ear transport roller are connected to the same motor via a speed reduction mechanism, the manufacturing cost of the web cutting device can be reduced (the invention according to claim 4). .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a web cutting apparatus according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a web cutting apparatus 10 according to the present embodiment. This web cutting device 10 includes a film,
This is a device for cutting a wide web 12 of paper, metal foil, or the like to obtain a narrow web 14 having a desired width. Actually, a web-like material (not shown) is provided by a web supply device (not shown). ) Is cut from the wide web 12, and the obtained narrow web 14 having a predetermined width is supplied to a web winding device (not shown).

A tension adjusting device (not shown) is provided on each of the upstream side and the downstream side of the web cutting device 10, and the wide web carried into the web cutting device 10 by the tension adjusting device. A predetermined tension is applied to 12 and the narrow web 14 carried out from the web cutting device 10.

The web cutting device 10 includes a lower blade 20 and an upper blade 2.
2 is provided. In the lower blade 20, a plurality of grooves 26 are formed at predetermined intervals. This groove 26
Are set in accordance with the standard of the width dimension of the product.
On the other hand, the upper blade 22 is formed in a disk shape,
It is fixed at a position corresponding to the upper groove 26.

A pulley 30 is fixed to one end of the lower blade 20. The pulley 30 is connected to a pulley 3 via a belt 32.
4. The pulley 34 is connected to a belt 36.
Pulley 4 fixed to drive shaft 40 of motor 38 through
It is connected to 2. That is, when the motor 38 is driven to rotate the drive shaft 40, the rotation is transmitted to the lower blade 20 via the pulley 42, the belt 36, the pulley 34, the belt 32, and the pulley 30, and the lower blade 20 rotates. . In this case, the pulley 42, the belt 36, the pulley 34, the belt 32, and the pulley 30 constitute a first speed reduction mechanism 44.

As shown in FIG. 2, the motor 38 is driven by a current supplied from a driver 46. A control signal is supplied from the controller 50 to the driver 46. Then, the motor 38 is connected to the controller 50.
And generates a torque corresponding to the current value supplied from the driver 46 based on the control signal from the controller 46 to rotate.

As shown in FIG. 1, a gear 52 is provided at the other end of the lower blade 20, and a gear 54 is provided at one end of the shaft 28 to which the upper blade 22 is fixed. And
When the gear 52 and the gear 54 mesh with each other, the upper blade 2
2 rotates in conjunction with the lower blade 20. At that time, upper blade 2
The portion of the circumferential portion 2 facing the groove 26 is the groove 26
And cuts the wide web 12. As a result, a narrow web 14 having a width dimension corresponding to the interval between the groove 26 and the upper blade 22 is obtained.

As shown in FIG. 2, an upper blade pressing mechanism 56 is connected to the shaft 28, and the upper blade 22 is pressed against the groove 26 of the lower blade 20 by the upper blade pressing mechanism 56. The upper blade 22 is displaced by the upper blade pressing mechanism 56 in a direction approaching the lower blade 20 or in a direction away from the lower blade 20.

As shown in FIG. 1, a web feed roller 58 is disposed upstream of the rotary blade 24. At one end of the web feed roller 58, a pulley 60 is provided.
The pulley 60 is connected to the pulley 34 via a belt 62. When the motor 38 is driven and the rotation of the drive shaft 40 is transmitted to the pulley 34 via the pulley 42 and the belt 36, the rotation of the pulley 34 is further transmitted to the web feed roller 58 via the belt 62 and the pulley 60. . At this time, the web feed roller 58 rotates in conjunction with the rotary blade 24 and supplies the wide web 12 to the rotary blade 24. That is, the pulley 42, the belt 3
6, a pulley 34, a belt 62, and a pulley 60 constitute a second speed reduction mechanism 64.

On the downstream side of the rotary blade 24, the wide web 12
Ear transporting device (ear transporting means) for transporting the remaining cutting ear 66, which is the remaining portion obtained by cutting the wide web 12 to obtain the narrow web 14, to the ear processing device (not shown)
70 are arranged. The ear conveying device 70 has an ear conveying roller 72. A pulley 76 is provided on a shaft 74 of the ear conveying roller 72, and the pulley 76 is connected to a pulley 80 provided on the drive shaft 40 of the motor 38 via a belt 78. When the drive shaft 40 is rotated by driving the motor 38, the rotation is performed by the pulley 80 and the belt 7.
8 and the pulley 76 to the shaft 74, and the ear transport roller 72 rotates. That is, the pulley 76, the belt 78 and the pulley 80 cause the third reduction mechanism 8
2 are configured.

Here, the ratio between the pulley 76 and the pulley 80 (pulley ratio) is such that the peripheral speed of the
2 and the peripheral speed of the lower blade 20 are set to be 0.5% to 5.0% higher.

The ear conveying device 70 has a pair of nip rollers 84 that rotate in conjunction with the ear conveying rollers 72 while sandwiching the cutting ears 66 between the ear conveying rollers 72. The shaft 86 of the nip roller 84 is connected to a pair of arms 88a, 8a.
8b, the arm 88a is rotatably supported.
88 b is rotatable about a support shaft 90. A rod member 92 is provided at one end (an end opposite to the nip roller 84) of each of the arms 88a and 88b, and a rod 96 of a cylinder 94 is fixed substantially at the center of the rod member 92.

As shown in FIG. 2, a regulator 98 is connected to the cylinder 94.
Air is supplied from the pump 100 to the cylinder 94 via the. Then, the cylinder 94 is urged by the air from the regulator 98, and the nip roller 84 is displaced in a direction approaching the ear transport roller 72 or in a direction away from the ear transport roller 72.

In this case, the regulator 98 adjusts the pressure (air pressure) of the air supplied to the cylinder 94 based on the control signal from the controller 50. As described above, by adjusting the air pressure, the pressure (pressing force) of the nip roller 84 pressing the ear conveying roller 72 is controlled to a predetermined value. Further, according to this pressing force, the ear conveying device 70
Is controlled so that the tension applied to the cutting ears 66 at the upstream side is substantially the same as the tension applied to the narrow web 14, for example. This is because the frictional force generated between the cutting ear 66 and the ear conveyance roller 72 changes according to the pressing force. The ear transport roller 72 is made of, for example, a metal material, and the nip roller 84 is made of, for example, a resin material such as rubber.

The web cutting device 10 according to the present embodiment
Is basically configured as described above. Next, its operation and effect will be described.

When the motor 38 is driven while the upper blade 22 is pressed against the groove 26 of the lower blade 20 by the upper blade pressing mechanism 56, the first reduction mechanism 44, the second reduction mechanism 64, and the third The rotary blade 24, the web feed roller 58, and the ear transport roller 72 are rotated via the speed reduction mechanism 82, respectively. At this time, the wide web 12 supplied to the rotary blade 24 by the web feed roller 58 is cut by the lower blade 20 and the upper blade 22 constituting the rotary blade 24 to obtain the narrow web 14. The narrow web 14 is transported to a web winding device (not shown).

The cutting ears 66, which are both ends of the wide web 12 and the remaining portion obtained by obtaining the narrow web 14 from the wide web 12, are carried out to an ear processing device (not shown) by the ear conveying roller 72. At this time, the cutting ear 66 is sandwiched between the nip roller 84 and the ear conveyance roller 72 with a predetermined pressing force. This pressing force is controlled by adjusting the air pressure supplied to a cylinder 94 connected to the nip roller 84 by a regulator 98.

The peripheral speed of the ear conveying roller 72 is set to
2 and the peripheral speed of the lower blade 20 are set to be 0.5% to 5.0% higher. For this reason, the nip roller 8
The tension applied to the cutting ear 66 can be controlled by adjusting the pressing force on the ear transport roller 72 of No. 4.

In this case, in the present embodiment, the peripheral speed of the ear conveying roller 72 is set to be 0.5% to 5.0% higher than the peripheral speed of the upper blade 22 and the lower blade 20. Further, the pressure by which the nip roller 84 presses the ear conveyance roller 72 is determined by the cylinder 9 connected to the nip roller 84.
It is controlled by adjusting the pressure of the air supplied to 4 in a regulator 98. Thus, for example,
An error occurs in the width dimension of the narrow web 14, such as when the tension applied to the cutting ear 66 is released, or when the tension is greater than the tension applied to the narrow web 14. Is avoided. Therefore, when the narrow web 14 is, for example, a movie film or a photographic negative film, excellent image quality can be obtained.

The rotary blade 24 and the ear transport roller 72
Are the first to third reduction mechanisms 44, 64 and 8, respectively.
Since the web cutting device 10 is connected to the same motor 38 through the second cutting device 2, the manufacturing cost of the web cutting device 10 can be reduced.

[0036]

According to the web cutting device of the present invention,
At both ends of the wide web, it is possible to control the tension applied to the cutting ears, which are the remaining portions of the narrow web obtained by cutting the wide web, to a predetermined value. A highly accurate width dimension can be obtained.

Further, since the rotary blade for cutting the wide web and the ear transport roller for carrying out the cutting ear are driven by the same motor, the manufacturing cost of the web cutting device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a web cutting device according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically showing a configuration of means for driving the web cutting device shown in FIG.

[Description of Signs] 10 Web cutting device 12 Wide web 14 Narrow web 20 Lower blade 22 Upper blade 24 Rotary blade 38 Motor 44 First reduction mechanism 46 Driver 50 Controller 56 Upper Blade pressing mechanism 58 Web feed roller 64 Second deceleration mechanism 66 Cutting ear 70 Ear transport device (ear transport means) 72 Ear transport roller 82 Third reduction mechanism 84 Nip roller 94 Cylinder 98 Regulator 100 ... pump

Claims (4)

[Claims] 1. A rotating blade for cutting a running wide web along a running direction to obtain a narrow web having a desired width, and an ear conveying means for carrying out a cutting ear generated at the time of the cutting, The ear conveying means, an ear conveying roller rotating in a direction in which the cutting ear is carried out, a nip roller rotating with the ear conveying roller while sandwiching the cutting ear between the ear conveying roller, and the ear conveying roller. And a nip roller pressing mechanism for pressing the nip roller with a predetermined pressure, wherein the peripheral speed of the ear transport roller is set higher than the peripheral speed of the rotary blade. 2. The web cutting apparatus according to claim 1, wherein the nip roller pressing mechanism displaces the nip roller in a direction approaching the ear transport roller or in a direction away from the ear transport roller, and supplies the cylinder with the nip roller. A regulator for controlling the pressure of the nip roller pressing the ear transport roller by adjusting the pressure of the air to be supplied. 3. The web cutting device according to claim 1, wherein the peripheral speed of the edge conveying roller is set to be 0.5% to 5% higher than the peripheral speed of the rotary blade. Cutting device. 4. The web cutting device according to claim 1, wherein the rotary blade and the ear transport roller are respectively connected to a same motor via a speed reduction mechanism. Web cutting equipment.