JPH04338544A - Method for automatic reversing in detecting apparatus - Google Patents

Abstract

PURPOSE:To provide a method for automatic reversing wherein a defect existing on a running continuous printing film is detected and even if the continuous printing film is wound up due to inertia after the detection, this wound printed film is unwound automatically to a required position. CONSTITUTION:A method for unwinding with a constitution wherein a feeding reel and a winding reel are provided on a machine and a plurality of guide rollers are provided between these both reels and a detector, a marking device, a detecting table and a detecting tube detecting a marking are provided by facing them to the continuous printing film running along the guide rollers from the feeding reel; in addition, on the feeding side, a reversely driven pulse motor connected with the detecting tube and a rotary encoder are provided to detect a defect position; then, a marking is made by this signal and the mark on the printing film running by an inertia force and the pulse motor wherein the number of pulses are set this signal and the rotary encoder are worked and film is unwound automatically to a required position by comparing the pulses of the pulse motor and the encoder.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention detects defective areas such as uneven printing, unclear discoloration of designs, etc. on a continuous printing film that is continuously running. The present invention relates to an automatic reversing method in a detection device that automatically rewinds a film to a desired position.

0002

[Prior Art] Conventionally, a detection method is known in which defective areas are detected using a detector while running a continuous printed film, but after the defective area is rolled up, it is automatically rewound to a desired position. There was nothing.

0003

[Problem to be Solved by the Invention] The problem to be solved is that when a defective part of the running printing film is detected,
Because the printing film travels at a high speed, it is wound up by inertia,
In order to unwind this, it had to be done manually. Therefore, the work was difficult and inconvenient.

0004

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention has been proposed for the purpose of solving this problem. A mark is applied by a marking means provided on the winding side, and then the winding is performed, and a detection tube installed on the winding side detects this mark, and this signal operates a rotary encoder connected to the pulse motor to drive the pulse motor. Press to rewind the printing film to the set number of pulses and stop. At this time, the defective part is automatically reversed so that it is located on the inspection table provided on the winding side.

[0005]

[Embodiment] The figure shows an embodiment of a device related to an automatic reversing method in a detection device according to the present invention. 1 is a machine body, and this machine body 1 has a printing film F wound left and right. A supply reel 2 and a take-up reel 3 for winding up the printing film F are provided. Furthermore, there is a printing film F on fuselage 1.
multiple guide rollers 4, 5, 6, 7 and 8, 9 that guide the
, 10 are disposed between the reels 2 and 3, and the printing film F from the supply reel 2 is wound onto the take-up reel 3 while being guided by the guide rollers.

Further, between the guide rollers 7 and 8, a detector 11 connected to a control panel is disposed at the upper part, and a light emitter 12 is disposed at the lower part corresponding to the detector 11.
It is designed to detect defects that occur in

The control panel of the detector 11 is connected to a marking means 13 provided on the supply side corresponding to the printing film F, and the marking means 13 marks the surface of the printing film at the same time as detecting a defective part of the detector 11. It is designed to be applied.

Furthermore, on the winding side, the printing film F
A detection tube 14 connected to a reversal control panel for detecting a mark at a position corresponding to the mark part of the printing film F
An autopsy lamp 16 is arranged to provide illumination for inspecting defective areas to facilitate inspection. Further, the reversal control panel connects a pulse motor 17 and a rotary encoder 18 that drive the supply reel 2 in the reverse direction on the supply side, and the pulse motor 17 is configured to position the defective area on the inspection table 15 when rewinding the printing film F. The number of pulses can be set. That is, when the mark on the detection tube 14 is detected, the pulse motor 17 is driven, which is compared with the encoder 18, to reversely rotate the supply reel 2, and the encoder 18 is operated so that the number of pulses can be compared and the pulse motor 17 is stopped. It has become.

It goes without saying that when the motor for driving the winding reel 3 and the rewinding pulse motor 17 mutually drive the winding reel 3, they do not interfere with the winding by using appropriate means.

0010

[Operation] The printing film F supplied from the supply reel 2 is wound onto the take-up reel 3 while being guided by the guide roller.
If there is a defective spot on the surface, this defective spot is detected by the detector 11, and this signal is simultaneously sent to the marking means 13, where a mark is instantaneously applied to the running printing film surface F, and the film is wound up. The motor on the side stops winding, but the printing film F is wound and advances due to inertial force. When the detection tube 14 installed on the winding side detects a mark on the printing film F flowing due to the inertial force, this signal is The pulse motor 17 and the rotary encoder 18 are operated, and when the pulse motor 17 for which the number of pulses has been set in advance can be compared with the pulses of the rotary encoder 18, the pulse motor 17 is stopped and rewinding is stopped. At this time, the defective portion of the printing film F is automatically rewound to the position of the inspection table 15 provided on the winding side. In the autopsy table 15, defective locations are processed.

[0011]

According to the present invention, when a defective spot on a running printing film is detected, it is immediately marked by a marking means, and when the mark is detected by a detection tube at a further advanced position, a pulse motor is driven to rotate in reverse, and a rotary Rewinding can be done automatically by reversing until the pulses of the encoder can be compared, and the rewinding position can be freely set by setting the number of pulses of the pulse motor.

[0012] That is, the winding can be automatically rewound after a defective location is detected, and since no manual work is required, there is an effect that the work becomes more efficient.

[Brief explanation of the drawing]

FIG. 1 is a side view of a detection device.

FIG. 2 is a side view of a portion of the rotary encoder.

[Explanation of symbols]

1 Body 2 Supply reel 3 Take-up reel 4-10 Guide roller 11 Detector 12 Floodlight 13 Marking means 14 Detection tube 15 Autopsy table 16 Lamp 17 Pulse motor 18 Rotary encoder F
printing film

Claims (1)

[Claims] Claim 1: A take-up reel and a supply reel are arranged on both sides, and a plurality of guide rollers are arranged between them, and the printed film from the supply reel is wound onto the take-up reel while being guided by the respective guide rollers. At that time, the detection device detects the defective place using a detector provided on the upper part, and at the same time the defective place is detected by the above-mentioned detector, a mark is applied with a marking means provided corresponding to the surface of the printed film. When further winding is carried out, the detection tube installed on the winding side detects the mark, and at the same time the rotary encoder is operated, and the pulse motor is driven and stopped to collate up to the set number of pulses, and the defective part is detected and the desired winding is performed. An automatic reversing method for a detection device that automatically rewinds to the surface of an autopsy table provided on the side.