JPS6253420B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for positioning a take-up arm of a film slitter in the film width direction.

[Prior Art] Generally, in a film slitter that cuts a wide film and winds a plurality of narrow films, a large number of cutters and winding arms are provided in the width direction of the film. Further, in order to wind up the cut film into a roll having a good winding shape, a pressure roll may be provided which is pressed against each take-up film roll having a width corresponding to each take-up film roll.

The winding arm and pressure roll of these slitters must be moved in the width direction of the film in accordance with the cutting position of the film to be cut, and this movement requires considerable positioning accuracy.
Regarding this positioning accuracy, for the winding arm, strict relative positional accuracy is required between the end of the winding core supported by the winding arm and the end of the cut film, for example, within 1 mm, and for the pressure roll,
Accuracy within, for example, 10 mm is required so that the cut film is placed approximately in the center of the surface length of the pressure roll, and particularly strict accuracy is required for the winding arm.

Conventionally, the positioning of the take-up arm and the pressure roll has been performed in the following manner. That is, first, the cutter is positioned and set at a position corresponding to the film cutting width. Thereafter, the positions of the winding arm and the pressure roll are roughly adjusted by visual inspection to a position approximately corresponding to the cutter position, and in this state, the cut film is wound for a short time, and the end of the cut film that has been wound for a short time is Based on this, the take-up arm and pressure roll are finely adjusted and positioned at predetermined positions. In this way, when using the conventional method, the set position of the cutter and the winding arm are located at a distance, so it is necessary to pass the cut film to the winding section and compare it with the actual end of the cut film. be. Moreover, since the film itself is thin and has low rigidity, the film may be twisted or wrinkled immediately after being set in the cutter, so it takes a considerable amount of time to pre-wind the cut film in order to know the predetermined position of the cut film end at the winding section. It was necessary to go for a long time.

Therefore, the conventional winding arm and pressure roll positioning method takes a long time to position the cut film for preliminary winding, which reduces the operating rate of the slitter.
Furthermore, since the film that is pre-wound becomes a loss, there is a problem in that this pre-winding contributes to an increase in film loss during the slitting process.

To solve this problem, Japanese Patent Application Laid-Open Nos. 49-13570 and 50-28085 disclose a drive means such as a screw shaft extending over the entire length of the slitter in the film width direction, and a drive means related to the drive means. When the cutter is moved, a clutch means that can be disengaged and released is provided, and these devices are combined with a cutter device or a winding arm, and the winding arm setting position is determined in conjunction with the moving position of the cutter, and the winding is performed in accordance with the position of the cutter. An apparatus for automatically positioning an arm is disclosed.

[Problems to be Solved by the Invention] However, the above proposed structure has the following problems.

In general, the winding arm has a fairly high rigidity because it is required to receive the winding tension (winding torque) of the film being wound onto the winding core attached to it, and also to support the weight of the film roll being wound. is required. Furthermore, the take-up arm must have a built-in drive source or drive force transmission mechanism for rotating the take-up core, and must have a size that corresponds to at least the maximum winding diameter of the take-up film roll. Therefore, the winding arm itself has to be designed to be quite large. Therefore, each winding arm becomes considerably heavy. If such a heavy object is driven in the width direction of the film and automatically positioned at a predetermined position, a large inertial force acts upon stopping. If the inertial force becomes too large, it will be difficult to ensure positioning accuracy, so the only way to keep the inertial force low in order to maintain positioning accuracy is to make the moving speed at least before stopping extremely low. However, if the moving speed is kept low, it will take more time to move to a predetermined position, and in the end it will take much less time to move manually.

On the other hand, in a cutter device, since the cutter only cuts the film, a large force is not applied to the cutter, and the cutter only needs to have enough rigidity to prevent vibration, etc. Therefore, the device has a lightweight structure, and sufficiently high positioning accuracy is ensured even when moving at relatively high speeds.

The difference in weight between the winding arm and the cutter device is not just a difference in degree. For example, cutter devices are usually
Whereas the weight of a single take-up arm can be kept to just a few kilograms, a single take-up arm weighs several tens of kilograms, and in some cases can exceed 100 kilograms, a weight difference of ten times or more. Therefore,
If these are moved at the same speed and automatically positioned, the inertia of the take-up arm will be 10 times or more than that of the cutter device.Conversely, if you try to suppress the inertia to the same degree and ensure positioning accuracy, the take-up arm The moving speed of the cutter device must be reduced to 1/10 or less than that of the cutter device. Due to the required functions of the slitter, the positioning accuracy of the take-up arm must be ensured, so it became necessary to keep the moving speed of the take-up arm extremely low as described above, and even though automation was used, There is almost no effect in terms of improving the operating rate of the sliver, or conversely, there is a risk that the operating rate will deteriorate compared to when it is done manually.

Furthermore, regarding pressure rolls, the shafts at both ends of the roll are usually supported by arms, and when moving, the roll and arms on both sides must be moved as a set, so the relative positional relationship of these members is important. There is a problem in that it is quite difficult to automatically move it to a predetermined position while maintaining accuracy. Furthermore, even if an automatic positioning mechanism is realized, the pressure roll is given a normal film winding angle and receives the film tension, so the entire device needs to be quite rigid, even if it is not as rigid as the take-up arm. Therefore, it must be quite heavy. Therefore, the same problem of moving speed as in the above-mentioned winding arm arises, and it is difficult to significantly shorten the setting time compared to the case of manual operation.

The present invention focuses on the above-mentioned problems, and compared to the conventional method that relied entirely on manual inspection and visual inspection,
It improves the workability of positioning the winding arm and, if necessary, the pressure roll, eliminates the need for preliminary winding, and reduces the winding that actually occurs compared to a method that automatically positions the winding arm. By making it possible to significantly reduce arm setting time,
The purpose is to actually greatly improve the operation rate of the sliver and to minimize loss film generated during positioning.

[Means for Solving the Problems] A method for positioning the winding arm of a film slitter according to the present invention in accordance with this object is to position the winding arm of the film slitter in the width direction of the film. A light projecting device that emits a narrow beam of light is installed, and the projecting device is moved to the position of the cutter set according to the cutting width of the film, and the narrow beam of light emitted from the light projecting device is moved. It consists of a method of positioning the winding arm with reference to the width beam.

Then, if necessary, the pressure roll is also positioned based on the narrow beam.

[Function] In such a method, a narrow beam of light is projected to a position corresponding to the cutter setting position in the slitter winding section, and the winding arm and, if necessary, the pressure roll are positioned based on this light beam. Since the light beam is narrow, the take-up arm and the pressure roll can be easily and precisely positioned accordingly, and there is no need to pre-wind the film for positioning the take-up arm and the pressure roll. Also,
The take-up arm and pressure roll are positioned manually using a narrow beam of light or semi-automatically by manually operating a push button on a moving motor, etc., so there are almost no restrictions on movement speed, and even heavy objects cannot be used. Even if there is a problem, it can be quickly set in a predetermined position. As a result, positioning time is significantly shortened and loss film generated by positioning work is minimized.

[Embodiments] Preferred embodiments of the positioning method of the present invention will be described below with reference to the drawings.

The figure shows an embodiment of a film slitting device to which the method of the present invention is applied, and the direction perpendicular to the plane of the drawing is the film width direction. The film 1 conveyed on each guide roll is cut into a predetermined width by a predetermined number of cutters 3 set on the receiving blade roll 2 in the film width direction. A pressure roll 6 disposed at a position corresponding to the winding core 5 is attached to the winding core 5 supported by the winding arm 4 disposed in the width direction.
It is wound up while being pressed against it. The take-up arm 4 and pressure roll 6 are supported so as to be movable in the width direction of the film, and can be moved manually or semi-automatically by operating a moving motor or the like by pressing a button. It may be any other method. A laser beam projecting device 7 is provided above the winding section, and the projecting section 8 of this projecting device is supported so as to be swingable in the film running direction, that is, on a plane parallel to the paper surface. , the projected laser beam 9
can swing in the film running direction. This laser beam projection device may be capable of projecting narrow beams other than laser beams.

The laser beam projecting device 7 is moved on a rail 11 attached to the frame 10 of the slitter over the entire width in the film width direction, and is controlled by a pulse motor 12, and its position is controlled by the direction of the film width. The detection head 14 of the magnetic scale 13 provided on the side of the magnetic scale 10, the detection head 14 of the magnetic scale 13 provided on the side of the light projection device 7 which is moved under control, and the control device 15 that processes these signals.

The cutter 3 also has a pulse motor 17 that controls and moves the support device 16, and a magnetic scale 1.
8. The detection head 19 of the magnetic scale 18 and the control device 15 that processes these signals allow movement in the film width direction while being controlled.

Using a device having such a configuration, the positioning method of the present invention is carried out as follows.

First, the cutter 3 is controlled and moved to a predetermined position by the pulse motor 17 and the control device 15. The address of the stop position or target stop position of the cutter 3 on the magnetic scale 18 and the address of the magnetic scale 13 for controlling the movement of the laser beam projection device 7 are made to correspond by the control device 15, and the address of the magnetic scale 13 is Laser beam projector 7
is controlled and moved by a pulse motor 12 and a control device 15. Therefore, the laser beam projected from the laser beam projection device 7 positioned at a position corresponding to the position of the cutter 3 is projected as a narrow beam toward the winding section, and this beam position is The position corresponds to the cutter 3 in the winding section.
This cutter device and laser beam projecting device 7 are
Since the device is much lighter than the take-up arm 4, even if the pulse motors 17 and 12 are rotated at high speed and the device is moved at high speed, the inertia force at the time of stopping is kept relatively small, and both devices are Positioned with high precision.

Visually based on the laser beam 9 projected as described above, the winding arm 4 and, if necessary, the pressure roll 6 are moved manually or semi-automatically in the film width direction and positioned and set at a predetermined position. Ru. When the positioning of one set of the winding arm 4 and pressure roll 6 is completed, the laser beam projection device 7 is moved to a position corresponding to the next cutter by pressing a button, and this operation is repeated.

In this way, the laser beam 9 is accurately projected to a position corresponding to the cutter position of the winding section, and the winding arm 4 and, if necessary, the pressure roll 6 are also positioned based on this laser beam 9. There is no need to perform preliminary winding in order to know the position of the cut end face of the film in the winding section as in the conventional method, and the winding arm 4 and pressure roll 6 can be easily and precisely positioned by the position of the laser beam 9. .

Further, the laser beam projection device 7 is controlled to move one after another to the positions corresponding to the cutter position by simply pressing a button, so the positioning work of the winding arm 4 and the pressure roll 6 is performed according to the work order. It is done efficiently and in a short time. Since the positioning of the winding arm 4 and the pressure roll 6 is carried out manually or semi-automatically by pushing a button, it can be carried out extremely quickly even when the load is heavy.

Note that the moving force of the winding arm 4 and pressure roll 6, which are heavy objects, can be easily kept to a small level by applying a well-known structure, such as a smooth sliding surface structure or a structure using slide bearings. This also makes it easier to move the vehicle.

[Effects of the Invention] As described above, when the method for positioning the winding arm of a film slitter of the present invention is used, a narrow beam of light is projected to a position corresponding to the slitter position of the winding portion of the slitter; The narrow beam projection device is controlled to move to a position corresponding to the cutter position, so the winding arm is positioned to pre-wind the cut film based on the projected narrow beam. It is possible to easily and accurately position the device at a predetermined position in a very short period of time without having to perform manual operations.

This eliminates the need for preliminary winding of the cut film for positioning and fine adjustment of the winding arm, and eliminates the problem of having to keep the moving speed low as in automatic positioning of heavy objects. The time taken to position the take-up arm can be significantly shortened compared to the conventional method, thereby significantly improving the operating rate of the slitter. Further, if the pressure roll is positioned based on this narrow beam of light, the same effect as described above can be obtained.

Furthermore, since there is no need to pre-wind the cut film for positioning, it is possible to minimize the loss of film caused by positioning work.

[Brief explanation of the drawing]

The figure is a side view of a slitter to which the positioning method for a film slitter of the present invention is applied. 1...Film, 2...Blade roll, 3...Katsuta,
4... Winding arm, 6... Pressure roll, 7... Laser beam projecting device, 8... Light projecting section, 9... Laser beam, 10
...Frame, 11...Rail, 12,17...Pulse motor, 13,18...Magnetic scale, 14,19
...Detection head, 15...Control device.

Claims (1)

[Scope of Claims] 1. When positioning the winding arm of the film slitter in the film width direction, a light projecting device that emits a narrow beam of light in the direction of the winding arm is installed, and the light projecting device is activated. A film slitting machine characterized in that the winding arm is positioned by moving the cutter according to the position of the cutter set according to the cutting width of the film and based on the narrow beam of light projected from the light projecting device. How to position the winding arm. 2. The film slitting device according to claim 1, wherein the narrow beam is used as a reference for positioning a pressure roll that is pressed against a film that is wound on a winding core supported by a winding arm. How to position the arm. 3. By controlling the position of each of the light projecting device and the cutter using a magnetic scale, and making the positions controlled by the respective magnetic scales correspond to each other by a control device, the position of the light projecting device and the cutter can be aligned with the cutter. A method for positioning a winding arm of a film slitter according to claim 1. 4. A method for positioning a winding arm of a film slitter according to claim 1, wherein a laser beam is used as the narrow beam.