JPS60197560A - Breakage detecting method of tape or sheet - Google Patents

Abstract

PURPOSE:To enable generation of any breakage in all kinds of tape or sheet to be detected by interlocking a mechanism of detecting pulse generation with a taking-up device, thus detecting generation of any breakage through changes in pulses generated at the time of taking-up of tape or sheet. CONSTITUTION:Tape or sheet T processed within a specific range of speed is taken-up by rotation of a bobbin 5, thereby giving some preset tension to the tape or sheet T by starting rotation of a torque motor 1. Because of this tension on the tape or sheet T at the time of taking-up, a winding shaft 2 rotates at a taking-up speed and a pulse detector 13 detects number of pulses generated during taking-up of the tape or sheet T. If any breakage is caused in the tape or sheet T under these conditions, any load on the torque motor 1 by taking-up tension of the tape or sheet T is eliminated, and therefore, the winding shaft 2 rotates at a higher speed than taking-up one and the number of pulses detected by the pulse detector 13 increases to a great extent than those during taking- up, thus enabling generation of any breakage of the tape or sheet T to be detected through this change in number of pulses.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fracture detection method for detecting the occurrence of a fracture during winding of a tape or sheet.

Tapes and sheets that have been run in a constant speed range and subjected to various treatments are processed by connecting the output shaft of the torque motor 1 and the winding shaft 2 to the reduction gear mechanism 3 and the coupling 4, as shown in FIG. 1 or 2. The tape or sheet T is wound into rolls while applying a predetermined tension using a winding device which is interlocked with the winding device and drives a winding bobbin 5 attached to a winding shaft 2.

By the way, if a break occurs in the tape or sheet T during the winding operation using the above-mentioned winding device, it is necessary to promptly detect this and stop the operation.

Conventional methods for detecting the occurrence of a break in a running tape or sheet include a transmission detection method using a phototube and a reflection detection method.

In the former transmission type detection method, as shown in Fig. 1, the bobbin 5
The light-emitting phototube 6 and the light-receiving phototube 7 are arranged so that the tape or sheets T blocks light while the tape or sheet T is being wound up.If the tape or sheet T breaks, the light-receiving phototube 7 It is detected by receiving light.

However, the transmission type detection method as described above has the following drawbacks.

(1) Since it is necessary to block light with the tape or sheet, it cannot be used with transparent or translucent type tapes or sheets.

(Double-emitting phototube and light-receiving phototube are likely to be incorrectly installed, especially misalignment, which can easily cause non-detection.

(3) Malfunctions occur if exposed to camera flash light or sunlight.

The latter reflective detection method is shown in Figure 2, using tape, sea! A light emitting/receiving type phototube 8 is placed along the way of the vehicle (2), and the light from the phototube 8 is reflected by a tape or sheet and then received.

However, this reflective detection method has the following drawbacks.

(I) Tape, by light reflected from tape, sheets, etc.
Since breaks in sheets are detected, high reflectance type or diffuse reflection type tapes and sheets cannot be used because reflected light cannot be received.

(I[) Since the presence or absence of a tape or sheet is detected by reflected light, a dirty tape or sheet will cause a malfunction.

(III) Malfunctions occur when light is irradiated from the outside.

This invention was made to solve the above-mentioned problems with the conventional detection method using phototubes, and it is possible to detect tapes and sheets during winding, regardless of the conditions. It is an object of the present invention to provide a fracture detection method capable of detecting the occurrence of a fracture.

The configuration of the present invention is such that a pulse generation detection mechanism is linked to a winding device that winds tapes and sheets processed in a constant speed range on a bobbin driven by a torque motor.
The occurrence of breakage is detected by changes in pulses generated when sheets are wound up.

Hereinafter, the present invention will be explained based on FIGS. 3 and 4 of the accompanying drawings.

As shown in the figure, the winding device for winding tapes and sheets T connects the output shaft of a torque motor 1 and the winding shaft 2 via a reduction gear mechanism 3 and a coupling 4, and connects the winding shaft 2 to the winding shaft 2. It is constructed by providing a bobbin 5 for winding up tapes and sheets T.

A pulse generation detector 1 is installed in the rotating part of the winding device.
1 is interlocked, and when the tape or sheet T is wound, a pulse corresponding to the rotation speed is generated and detected, and breakage of the tape or sheet T can be detected by the change in the number of detected pulses. ing.

The pulse generation detector 11 is a spur gear-shaped pulse generator 1.
2 and a pulse detector 13 disposed close to the outer periphery of the pulse generator 12. The pulse generator 12 meshes with the gear 14 and rotates when the tape or sheet T is wound, and the pulse detector 13 detects the number of pulses proportional to the number of rotations of the winding shaft 2.

Note that the pulse generation detector 11 is not limited to the structure using a spur gear as shown in the figure; for example, the pulse generator 12 may have reflective tape pasted at regular intervals around the outer periphery of a disc. May be used.

The fracture detection method of the present invention is carried out using the pulse generation and detection device configured as described above, and the tape or sheet T after being processed is moved to the bobbin 5 by starting the torque motor 1 in a constant speed range. Wind it up while applying a predetermined tension by rotating.

A pulse generator 12 is connected to the winding shaft 2 via a spur gear 14.
rotates, and the pulse detector 13 detects the passage of the teeth formed on the outer periphery of the generator 12.
Detects pulses proportional to the rotation speed.

When the tape or sheets T is wound on the bobbin 5, the tension of the tape or sheets T is applied, so the winding shaft 2 rotates at the winding speed, and the pulse detector 13 indicates the pulse during winding. Detecting numbers.

If the tape or sheet T breaks in this state, the torque motor 1 is no longer loaded with the winding tension of the tape or sheet T', so the winding shaft 2 rotates at a higher speed than the winding speed. , it is known that the number of pulses detected by the pulse detector 13 has significantly increased compared to the number of pulses during winding, and that a break has occurred in the tape or sheet T due to this change in the number of pulses.

Incidentally, the relationship between the winding conditions and the number of pulses for the tape, Sheet Class 1 T, will be exemplified with specific numerical values with reference to FIG.

(A) Initial condition setting (1) Maximum winding diameter: [10 = 290 mm (a) Minimum winding diameter: Di = 80 mm (3) Winding speed range:
V = 1.6 ~ 3.2m / l1lfn (4) Torque motor rotation speed at maximum output: n = 1500p111 (5) Pulse generator: module m = 1, number of teeth 7 = 12
Set the 0 spur gear (B) reduction ratio R.

yr X 80 X 1500 X R≧3200,
', R≦117 Select R-75 with a margin.

(C) Number of pulses per second during steady winding P (pps
).

(11ft small diameter (1) [Fj: P =”'x-!!
= 25.5 (pps) Nine f(l et al. 0 (2) At maximum diameter: P-Shojikari υ = 3.51 (1
) I) S ) Therefore, pulse number range during steady winding: P = 3.51 to 25.5 (r) I) S ) (D) Calculate P at the time of tape breakage.

P-1500X engineering×do! ! -=+o(pps >7 friends &0 (E) Set the pulse count number P (pps).

From the above, the set pulse count number is between 26 (pps) and 40 (1) l) S), for example P = 30 (1) ps)
Set to .

Pulse setting value - 30 (ppS) The winding torque motor rotates at a constant voltage regardless of the tape winding speed, so by counting the number of pulses generated, it is possible to detect the occurrence of breaks in tapes and sheets. be able to.

However, at the time of starting winding, the rotation of the winding shaft becomes high due to slack in the tape and sheets.
It is preferable that the reset state can be maintained for about seconds, and the reset setting time and set count number are variable.

As described above, according to the present invention, a pulse generation detector is interlocked with the rotating part of a winding device that winds tapes and sheets, and pulses proportional to the winding speed of the tape and sheets are generated to prevent breakage. Since the breakage is detected by the change in the number of pulses, it is possible to detect tapes of transparent type, semi-transparent type, highly reflective type, diffusely reflective type, or any type of tape that is heavily soiled, which could not be detected using the phototube method.
It becomes possible to detect breaks during winding of sheets.

In addition, since the pulse generator is used in conjunction with the winding device, there is no malfunction due to external light, etc., and breaks can be detected without any restrictions on the location or conditions of use. .

[Brief explanation of drawings]

Figure 1 is a perspective view of the first example showing the conventional detection method;
The figure is a perspective view of the second example, FIG. 3 is a perspective view of the detection method according to the present invention, and FIG. 4 is an explanatory diagram illustrating winding of tapes and sheets. 1... Torque motor 2... Winding shaft 4... Coupling 5... Winding bobbin 11... Pulse generator) detector 12... Pulse generator 13... Pulse detector 14
... Spur gear patent applicant Nitto Electric Industries Co., Ltd. Representative Patent attorney Kazu 1) Akira

Claims (1)

[Claims] A pulse generation detection mechanism is installed in the rotating part of the winding device that winds tape sheets after being processed in a constant speed range on a bobbin driven by a torque motor, and detects the pulses generated when the tapes and sheets are wound. A method for detecting breaks in tapes and sheets, characterized by detecting the occurrence of breaks based on a change in .