JPS6122654B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is an EPC device for aligning the edges of sheets when rewinding or inspecting sheets or films (hereinafter simply referred to as sheets). The present invention relates to a new use of a device capable of winding up a sheet with its edges aligned on the winding side even if the sheet is winding, and is composed of a detection means, a transducer, an amplifier, a hydraulic machine, a cylinder, etc.

In the prior art, the EPC device was used to wind up a sheet from an unwinding shaft to an unwinding and winding shaft (referred to as forward operation). In contrast, in addition to the above-mentioned normal operation, the present invention unwinds the sheet on the take-up shaft to the unwind shaft during inspection etc. (referred to as reverse operation).
This relates to technology that allows operations to be easily performed with a single EPC device.

There are three conventional methods for aligning the edges of sheets that are continuously moving (running). To explain this with reference to the drawings, Fig. 1 shows a rewinding reel system, in which the EPC device is installed on the unwinding side (fixed to an immovable part such as the frame of the device), and the end of sheet A is detected. When the sheet A is separated from the detector 1, the cylinder 11 on the unwinding side is operated to pull the unwinding device 12 toward the end of the sheet A to correct it so that it can pass through the center of the detector. Figure 2 shows an unwinding reel system with a detector 1 at the end of the sheet on the winding side.
The EPC device is operated to correct the position on the unwinding side so that the sheet edge always passes through the center of the detector, thereby aligning the edge of the sheet during winding. Figure 3 shows an intermediate guide roll system, in which a pair of nip rolls are provided at an intermediate position between the unwinding side and the winding side, and the nip rolls correct the running direction of the sheet based on the signal from the detector on the winding side. The axial direction is changed so that the sheet end passes through the center of the detector.

These three methods are all normal operations in which the sheet is wound on the winding side by operations such as rewinding and slitting. By the way, in inspections, etc., there are cases where a larger amount of sheets remains on the unwinding side than on the winding side, so it is easier to rewind the sheet from the winding side to the unwinding side by reverse operation.

However, when the EPC device is activated during reverse operation, the timing of the unwinding device does not match the detection,
This causes a reverse action and increases the misalignment of the sheet edge. For this reason, current equipment uses EPC for rewinding.
Device is not available. As a means to solve this problem, the following method is derived from the above three methods.

The first method is to install two EPC devices, as shown in Figure 4. EPC devices are installed on both the unwinding side and the winding side, and either one can be used during forward or reverse operation. This is to operate the EPC device. Although this method requires equipment and equipment, it is clear from the above-mentioned rewind reel method or take-up reel method that it is operable. The second method is an intermediate guide method using two EPC devices as shown in FIG. However, all of these methods have drawbacks. For example, since the detector is fixed, not only sheet edge deviation within the detection adjustable range without manual operation but also deviation outside the adjustment range occurs. In this case, each time
It is necessary to correct it within the EPC device adjustment range. In addition, a special detection means is required in case of a large deviation of the sheet edge, which is undesirable from the viewpoint of work surface and product quality (if the sheet slides even slightly on the roll during forward/reverse switching, the sheet surface will be scratched). . In addition, it is necessary to align the sheet edges on both sides of the winding and unwinding sides.
Sliding means for the EPC device, unwinding device, and take-off device are required, making the equipment expensive.

In order to overcome the above-mentioned drawbacks, the inventors of the present invention have made extensive studies and created a new means for aligning the edges of sheets that does not require adjustment by switching between forward and reverse operation, and which is capable of using only one EPC device. This allows for easy winding and unwinding.

The present invention consists of a sheet unwinding device, a sheet take-up device, a detector that detects the position of the edge of the sheet, and one EPC device that corrects and controls the position of the unwinding device based on a signal from the detector. The sheet winding device is a sheet winding device in which the detector 1 is fixed to a fixed shaft 4A during winding and the unwinding shaft 6 is slid in the direction opposite to the direction of deviation of the sheet end, or when unwinding. A film or sheet winding device having a function of fixing the detector to another fixed shaft 4B interlocking with the unwinding shaft and moving the unwinding shaft in the same direction as the direction of deviation of the end portion. It is a collecting device.

The present invention will be explained in detail with reference to the drawings.

As is clear from the mechanism shown in Fig. 7, during normal operation, the fixed shaft 4A made of a square bar or a round bar (in the case of a round bar, a rotation stopper is required; fixed) via the electromagnet 3A,
Fix boss 2A. Further, the sliding movement of the detector 1 is fixed to the boss 2A. Since the boss 2B and the electromagnet 3B, which are other members, are connected by the three-point fixing pin 5 (see Fig. 8), the electromagnet 3B is connected to the unwinding shaft 6.
The shaft is located further away from the other fixed shaft 4B attached to the shaft. It is assembled so that it can freely slide on the boss 2B and the fixed shaft 4B. That is, the sixth
As shown in the figure, when the edge of the sheet A deviates from the center of the detector 1, the converter and amplifier 8 actuate the solenoid valve of the hydraulic pump 9, and the cylinder 11 moves the unwinding shaft 6 to the edge of the sheet. The position is corrected by sliding the unwinding device 12 in the opposite direction to the direction in which the sheet is misaligned until it is located at the center of the detector.

Next, during reverse operation, the boss 2B is fixed to the other fixed shaft 4B by an electromagnet 3B, so that the detector 1 moves almost synchronously with the unwinding shaft. In this case, since the boss 2A and the electromagnet 3A are connected by the fixed pin 5, the electromagnet 3A is connected to the fixed shaft 4A.
It needs to be more remote. The boss 2A is in a state where it can freely slide on the fixed shaft 4A. Thus, when the sheet end deviates from the detector, the hydraulic pump is activated via the converter and amplifier, and the position of the unwinding shaft is adjusted so that the sheet end reaches a predetermined position.

As mentioned above, the device of the present invention can be easily modified from a normal EPC device. Electrically, the signals of the converter and amplifier can be operated in forward and reverse directions using a rewinding/rewinding operation switch, and the hydraulic pump is linked to a solenoid valve to respond to rewinding/rewinding, thereby eliminating deviations and errors caused by switching. There is no movement, and sheet winding misalignment can be eliminated. However, in this case, it is necessary to always set the median value of the detector to electrical zero. Since the operation is reversed during forward and reverse operation, this adjustment accuracy appears as the amount of winding deviation. The required accuracy of zero point adjustment varies depending on the sheet, but with this device it is possible to adjust it within ±0.5mm.

Although an electromagnet (operated by a magnetic field) is used to fix the boss 2 to the fixed shafts 4A, 4B, it is not impossible to use screws as another simplest method. However, screws have drawbacks such as loosening when switching between forward and reverse operations and misalignment when tightening. When using the electromagnet of the present invention, the forward/reverse operation switching can be linked with the unwinding/unwinding switch, so there is no problem with screw fixing. In addition to fixing the device of the present invention, there is a method of separating the sliding rod and the fixed rod, but since this complicates the device, it is preferable to switch between the sliding rod and the fixed rod and use them at the same time.

If the sheet widths are different, it is necessary to move the boss considerably. In such a case, round bar (square bar) 4
It is very difficult to achieve perfect parallelism between A and 4B, considering that the hydraulic means slides. In order to solve this problem, it is essential to use a three-point fixing pin, and even if the accuracy of the sliding part of the hydraulic means is poor, or the parallelism of the two round bars is not perfect (sufficient). The device can also be slid.
It is also conceivable to reduce the accuracy of the sliding portion of the boss, but this is not preferable as a countermeasure against end deviation.

The fixing pin needs to be compatible so that one boss can be fixed to the other boss and the round bar, and it needs to be accurate enough to prevent the position of the detector from shifting during switching. This requires that the fixing pin should not wobble in the sliding direction of the boss, and that the three-point pin should be able to rotate equally smoothly. Similarly, the boss sliding part cannot be made softer, so the amount of end deviation is determined in conjunction with the zero point adjustment.

The device of the present invention requires an unwinding process such as inspection, and can be extremely effectively used in mechanical devices where the edges of sheets need to be aligned.

[Brief explanation of the drawing]

FIGS. 1 to 3 are perspective views of a conventional device capable of aligning sheet ends on the winding side, which are used only for rewinding. Figures 4 and 5 show two
FIG. 2 is a perspective view (reference example) of a winding and rewinding device provided with an EPC device. FIG. 6 is a perspective view of the device of the present invention. FIG. 7 shows a front view of the device of the present invention showing the method of fixing the detector. FIG. 8 is a side view of the fixing pin. In the drawings, 1 is a detector, 2 is a boss, 3 is an electromagnet, 4 is a round bar or square bar, 5 is a fixing pin, 6 is an unwinding shaft, 7 is a winding shaft, 8 is a converter and an amplifier, and 9 is a A hydraulic pump, 11 a cylinder, and 12 an unwinding device.

Claims (1)

[Claims] 1. A sheet unwinding device, a sheet take-up device, a detector that detects the position of the edge of the sheet, and one unit that corrects and controls the position of the unwinding device based on signals from the detector.
This is a sheet winding device consisting of an EPC device, in which the detector 1 is fixed to a fixed shaft 4A during winding, and an unwinding shaft 6
or, during unwinding, the detector is fixed to another fixed shaft 4B that interlocks with the unwinding shaft, and the unwinding shaft is moved in the same direction as the direction of deviation of the end. A film or sheet winding device characterized by: 2. The film or sheet winding device according to claim 1, characterized in that an electromagnet 3 is used as means for fixing the detector 1 to the fixed shaft (4A or 4B). 3. Claim 1 or 2 in which the boss 2A that clamps the fixed shaft 4A and the boss 2B of another fixed shaft 4B interlocked with the unwinding shaft 6 are connected by a three-point fixing pin 5. film or sheet winding device.