JP3545479B2 - Indication tape detection device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a product of a wound body obtained by a production machine for printing or other processing on a web of paper, plastic film, or the like, and the state of the product (particularly, good or bad) is measured from the edge of the wound body. When the instruction tape attached to the protruding web is indicated by an instruction tape, an instruction to detect a timing at which a portion of the web to which the instruction tape is attached is unwound from a paper feeding unit of a post-production machine, a defect removing device, or the like. The present invention relates to a tape detection device.
[0002]
[Prior art]
The timing at which the web portion to which the instruction tape is attached is unwound from the paper feeding section of the production machine, the defect removal device, etc. is visually grasped by an operator of the production machine, the defect removal device, etc. by visually checking the wound body, Although necessary measures were taken when the part was unwound, there was a problem that the operator was restrained for a long time.
Therefore, an indicator tape is detected by a detector. Conventionally, a method of detecting an indicator tape attached to a web after being unwound from a winding body is used.
[0003]
[Problems to be solved by the invention]
For this reason, due to the time delay from the detection of the indicating tape to the stop of the transfer of the web, a considerable amount of the portion of the web to which the indicating tape is attached is transferred, and the portion reaches the processing section to perform necessary processing. There is a problem in that the web must be rewinded after reversing the transport direction and necessary treatment must be performed.
It is also possible to record the state of the product of the wound body on a recording medium in a previous process and use the data in a subsequent process, but a system for accurately recording the state of the product and utilizing the record is used. Was not necessarily provided in the production machines in the preceding and following processes, and the data contained errors that could not be ignored in many cases. Therefore, even when using the data, it is usually necessary to correct the data recorded using the instruction tape.
[0004]
Therefore, an object of the present invention is to provide an apparatus that detects an instruction tape attached to a web at a predetermined timing before being unwound from a winding body, and enables an operator to perform a necessary treatment.
[0005]
[Means for Solving the Problems]
The above object is achieved by the present invention described below. That is,
The present invention relates to a first length measuring device for measuring a distance to a surface of a winding body to obtain a surface distance of the winding body, and a distance to an indicating tape protruding from an edge of the winding body and attached to a web. A second length measuring device for obtaining an indicating tape distance, and calculating a residual value until the portion of the web to which the indicating tape is attached is unwound from the winding body from the winding body surface distance and the indicating tape distance. And a signal output means for outputting a signal when the residual value becomes smaller than a predetermined value.
[0006]
[Action]
According to the indicating tape detecting device of the present invention, the distance to the surface of the wound body is measured by the first length measuring device to obtain the surface distance of the wound body, and the edge of the wound body is measured by the second length measuring device. The distance from the indicator tape attached to the web is measured by measuring the distance from the indicator tape attached to the web. A residual value until the reel is unwound is calculated, and a signal is output by the signal output means when the residual value is smaller than a predetermined value.
[0007]
【Example】
Hereinafter, the pointing tape detecting device of the present invention will be described based on a preferred embodiment. FIG. 1 is an explanatory diagram of the configuration and operation of the pointing tape detection device of the present invention. FIG. 1A is a diagram showing the front of the winding body, and FIG. 1B is a diagram showing the winding body and the side surface of the indicating tape detecting device of the present invention. In FIG. 1, reference numeral 1 denotes a winding body on which a web made of a material such as a plastic film, paper, or metal foil is wound, and 2 denotes a winding core on which the web of the winding body 1 is wound. A take-up support shaft (hereinafter, referred to as a support shaft) of a paper tube or a production machine, 3 is an instruction tape attached to the web in the previous process, and half-projected from the take-up body 1, 4 is provided above the take-up body 1. The first length measuring device 5 for measuring the surface distance of the wound body, which is the distance to the surface of the wound body, is provided above the wound body 1 and measures the indicating tape distance which is the distance to the indicating tape. 2 is a length measuring instrument, 6 is an information processing unit composed of a main body such as a personal computer and an engineering workstation, and peripheral devices such as a display, a keyboard, a mouse, an external storage device, and a communication line such as an Ethernet. Machine control unit which controls the production machine has an interface with the broadcast processing unit 6, 8 alarm device connected to the output port of the information processing section 6, 9 is a production machine.
[0008]
The operation of the pointing tape detection device in the above configuration will be described. As shown in FIG. 1B, the production machine 9 includes a paper feeding unit, a processing unit, and a paper discharging unit, and the winding body 1 is supported by a paper tube (support shaft) 2 of the paper feeding unit. I have. The take-up body 1 is rotatably supported, but the support shaft of the paper feeding unit is operated by a brake torque or a reverse rotation torque so that the web sent from the take-up body 1 is not loosened. A mechanism consisting of a powder brake, motor, etc. is attached. The web is usually transported in synchronism with the rotation speed of the driven drive roller, and the web delivered from the paper feed unit is processed in the processing unit, and then the paper tube on which the winding torque of the discharge unit acts. It is wound again at (support shaft) 2.
[0009]
As shown in FIG. 1 (A), a first length measuring device 4 and a second length measuring device 5 are provided above the winding body 1 and rotate a paper tube (support shaft) 2 in a paper feeding section of a production machine 9. It is fixed in the axial direction at a distance of Lc from the central axis. The distance from the outer peripheral surface of the paper tube (support shaft) 2 is Lb. Further, the distance from the indicating tape 3 is Lt when the indicating tape 3 is closest to the second length meter 5, and the distance from the outer peripheral surface of the winding body is Lr.
Among these distances, the distance Lc is a fixed value. The distance Lb is also a fixed value determined by the outer diameter of the paper tube (support shaft) 2, and can be a fixed value without measurement when the outer diameter of the used paper tube (support shaft) 2 is constant. Of course, if necessary, the distance Lb can be measured together with the distance Lr and the distance Lt.
The distance Lr is measured by the first length meter 4, and the distance Lb and the distance Lt are measured by the second length meter 5. Since the winding body 1 rotates by unwinding the web, the maximum value of the distance measured by the second length measuring device 5 is the distance Lb, and the minimum value is the distance Lt.
[0010]
As the first length measuring device 4 and the second length measuring device 5 for measuring such a distance (several centimeters to several tens centimeters), for example, an ultrasonic wave is emitted and the ultrasonic wave is reflected from an object and returned. An ultrasonic range finder that measures distance from the time of, for example, irradiates an object with a laser beam, detects a laser spot on the object from an oblique direction, and performs triangulation from the detection position of the laser spot (the incident direction of the laser spot). It is possible to use a laser distance meter or the like that measures the distance based on the principle, and use a length measuring device suitable for the material of the winding body and the indicating tape as appropriate.
An analog detection signal including the above distance data detected by the first length meter 4 and the second length meter 5 is input to the information processing unit 6. The information processing unit 6 performs A / D conversion of the detection signals of the first length measuring device 4 and the second length measuring device 5 to convert the analog signals into digital data, and then performs data processing to obtain the distance Lr, the distance Lt, and the distance Lb. And so on. For example, the distance Lr is obtained as an average value of measurement values of a predetermined number of times, and the distance Lt and the distance Lb are measured a plurality of times densely during one rotation of the winding body 1, and the minimum value and the maximum value of the measurement values are obtained. Asking.
[0011]
From the distance and the web thickness Th, the length of the web from the winding surface of the winding body 1 to the indicating tape 3 (that is, the residual value) can be obtained. The calculation formula is shown in Equation 1 below.
(Equation 1)
K = π (Lr ² + 2Lc * Lt−2Lc * Lr−Lt ² ) / Th
However, K: length of the web from the winding surface of the winding body 1 to the indicating tape 3; pi; pi (3.14159 ...)
Lr; distance Lc between the first length measuring instrument 4 and the outer peripheral surface of the winding body 1; distance Lt between the first and second length measuring instruments and the rotation center axis of the winding body 1; Distance Th; thickness of web
The calculation means performs the calculation of the above equation 1, and is specifically one of the functions performed in the information processing unit 6. K (residual value) is obtained each time a new detection signal from the first length meter 4 and the second length meter 5 is input to the information processing unit 6. Further, the K (residual value) is compared with a predetermined value by a signal output means, which is another function performed in the information processing section 6, and when the K (residual value) becomes smaller than the predetermined value, the alarm 8 is activated. A signal and a signal for stopping the production machine immediately before the web to which the instruction tape 3 is attached are unwound are output.
As described above, there are at least two of the predetermined values, and whether the values are different or the same is appropriately selected according to the situation. The predetermined value is input and set manually in the information processing section 6 through a communication line, a storage medium, or a keyboard.
[0013]
FIG. 2 is a graph schematically showing the relationship between the value of K (residual value) with respect to time obtained by the calculation means and a predetermined value. In FIG. 2, the vertical axis represents the winding distance from the winding table to the tape distance (that is, K) at the time of unwinding and the horizontal axis represents the time axis. K (residual value) is calculated and obtained for each shaft rotation cycle of the winding body 1, and decreases with time (in FIG. 2, the change is exaggerated for easy understanding). (Predetermined value). At that time, a signal for warning and a signal for decelerating and stopping the production machine are output from the signal output means.
[0014]
Returning to FIG. One of the signals output from the information processing section 6 is output to the alarm device 8 to activate the alarm device 8 as described above. The alarm 8 plays a role of notifying the operator of the production machine of the situation with a buzzer, a flashing lamp, or the like.
One of the signals output from the information processing unit 6 is output to the machine control unit 7. The machine control unit 7 is composed of a programmable sequence control device, an input / output terminal device for data and signals, and the like. The machine control unit 7 controls the production machine 9 based on an operation input from an operator's operation panel and output signals of other state detection devices. Control is performed, and an output signal from the information processing unit 6 is received.
When a signal output from the information processing unit 6 is received, a series of sequence programs for decelerating and stopping the operation speed of the production machine are started in the machine control unit 7, and the distance of web transfer is detected by the distance meter on the production machine 9. Since it is input to the machine control unit 7, the machine control unit 7 performs a control operation of stopping the production machine 9 immediately before the web to which the instruction tape 3 is attached is unwound.
[0015]
In this state, the operator can take necessary measures. For example, if the indicating tape indicates the beginning of a defect, and the defect continues for a relatively long distance, the web is transferred from the paper feeding unit to the paper discharging unit at high speed without processing on the production machine 9, Save material and time for processing. In the case of the defect removing device, the operator confirms the defect and removes the defective portion, connects the non-defective portion, and attaches a new instruction tape indicating the fact to the connection portion.
Further, for example, if the indicating tape indicates the beginning of a non-defective product, it is not always necessary to decelerate and stop the production machine 9 after the alarm device 8 is actuated. (In the case of a printing machine or a coating machine, the impression cylinder is inserted), the fact that production of non-defective products has been started is input from the operation panel, and counting of non-defective products is started.
[0016]
【The invention's effect】
As described above, according to the present invention, there is provided an instruction tape detection device that detects an instruction tape attached to a web at a predetermined timing before being unwound from a winding body and outputs a signal for operating an alarm or the like. . Therefore, the operator is free from a long-time restraint operation such as always checking the instruction tape of the winding body, and can perform a necessary measure without fail when necessary.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of the configuration and operation of an instruction tape detecting device of the present invention.
FIG. 2 is a graph schematically illustrating a relationship between a value of K (residual value) with respect to time obtained by a calculation unit and a predetermined value.
[Explanation of symbols]
1 Winding body 2 Paper tube (support shaft)
3 instruction tape 4 first length measuring instrument 5 second length measuring instrument 6 information processing section 7 machine control section 8 alarm 9 production machine

Claims (1)

A first length measuring device for measuring a distance to a surface of the winding body to obtain a surface distance of the winding body; and a measuring tape for measuring a distance from an edge of the winding body to an indicating tape attached to a web. And a calculating means for calculating a residual value until the portion of the web to which the indicating tape is attached is unwound from the winding body from the winding body surface distance and the indicating tape distance. Signal output means for outputting a signal when the residual value becomes smaller than a predetermined value.

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