JP2609172B2 - Abnormal detection device for rotary press - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detection device for a rotary press, and more particularly, to an abnormality detection device for detecting an abnormal feeding of a folding material in a folding mechanism of the rotary press.

[Conventional technology]

Examples of the abnormality detecting device for a rotary press according to the related art include, for example, a device described in Japanese Patent Publication No. 395121 (hereinafter referred to as Conventional Technology 1) and a device described in Japanese Patent Publication No. Japanese Patent Publication No. 51-13135 (hereinafter referred to as "prior art 3").
No. 55-44023 (hereinafter referred to as prior art 4), Japanese Patent Publication No. 58-41258 (hereinafter referred to as prior art 5), and Japanese Unexamined Utility Model Publication No. 57-162845. (Hereinafter referred to as Conventional Technique 6).

The prior art 1, the prior art 2, and the prior art 5 are set to a reference state by a paper passage detection unit that detects that the folded paper has passed a predetermined position, and a paper passage detection signal of the paper passage detection unit. A power storage unit configured to discharge over time or charge over time from the reference state, and an abnormal signal output unit are provided, and when the paper passage detection signal is interrupted, the amount of power stored in the power storage unit exceeds a predetermined value. When
Alternatively, the abnormal signal output unit outputs an abnormal signal when the value falls below.

In addition, the above-mentioned prior art 3, prior art 4, and prior art 6 are:
A paper detecting section for detecting a folding paper at a predetermined position, a timing signal output section for outputting a timing signal in accordance with a timing at which the folding paper should exist at the predetermined position, and an abnormal signal output section, When the output of the timing signal from the timing signal output section does not match the output of the paper detection signal from the paper detection section, the abnormal signal output section outputs an abnormal signal.

[Problems to be solved by the invention]

The above-mentioned prior arts 1, 2, and 5 detect that the folding paper is sent out at constant time intervals by the constant speed operation of the rotary press, and the detection signal sets the power storage unit to the reference state. There is a configuration in which an abnormal signal is output when the amount of power stored in the power storage unit exceeds or falls below a predetermined value so as to discharge or charge over time from the reference state, so that the operation speed of the rotary press is reduced. When the speed is fast, the constant time interval is short, and the discharge amount or charge amount during the short period is small, but when the operation speed of the rotary press is slow, the constant time interval is long, and the discharge amount or the charge amount during the operation speed is high. Sometimes more.

Therefore, in this configuration, it is necessary to change the predetermined value in accordance with the operation speed of the rotary press, and if the predetermined value is not changed, there is no abnormality in the feeding of the folding paper by the rotary press. In some cases, an abnormal signal is output or an abnormal signal is not output when an error occurs. Therefore, in actual use, a predetermined value changing means for changing the predetermined value according to the operation speed of the rotary press is required separately, and as a result, the configuration of the device becomes complicated, so that the frequency of failure occurrence is reduced. It becomes expensive and the operation becomes complicated.

Further, the related art 3, the related art 4, and the related art 6 detect the folding paper at a predetermined position and output a paper detection signal, and the folding paper reaches the predetermined position according to the operation of the rotary press. And a timing signal output unit for outputting a signal in a timely manner, and outputting an abnormal signal when the paper detection signal does not match the timing signal. Therefore, unlike the related art 1, the related art 2, and the related art 5, the adjustment according to the operation speed of the rotary press is not required, but a means for outputting a timing signal and a paper detection signal is required. Is complicated. The above 2
It is also necessary to adjust the output of the various signals, and if the alignment is not accurate, an abnormal signal is output even when there is no abnormality in the feeding of the folding paper by the rotary press, or when there is an abnormality. A malfunction such as not outputting an abnormal signal occurs, and a malfunction due to noise or the like is large.

[Means for solving the problem]

An abnormality generating device that detects an abnormality in feeding of a folding stock in a folding mechanism of a rotary press according to the present invention that solves the above-described problems, a pulse signal output unit that outputs a pulse signal according to the operation speed of the rotary press, The detection of the passage of the fold paper sequentially sent from the folding mechanism of the rotary press, and the output of the fold paper in the vicinity of the folding mechanism so as to output a fold paper passage detection signal every time one fold paper passes. The paper passage detection means provided only with a single passage line perpendicular to the transport direction in the passage path, and the pulse signal from the pulse signal output means and the folding paper passage detection signal from the paper passage detection means are inputted. It is connected, counts the number of continuous pulses of the input pulse signal, and resets the count value each time the folding paper passage detection signal is input, thereby detecting two consecutive folding paper passage detection signals. The number of pulses of the pulse signal during the force interval is counted, and the number of pulses counted during the output interval of the two folding paper passage detection signals is continuously input and stored in the normal passage state of the folding paper. A comparison / determination unit that compares the pulse count value with a preset value that is appropriately larger than the number of pulses of the pulse signal during the output interval of the two folding paper passage detection signals and outputs an abnormal signal when the pulse count value reaches the preset value. And an abnormal signal output means.

[Action]

First, in the operation of the rotary press, the printing unit and the folding unit are simultaneously driven. Then, the web stock printed by the printing unit is sent to the folding unit, cut into a fixed length by the folding mechanism, folded, and sequentially sent out periodically as a folding stock.

Then, the fed folding paper is individually detected by the paper passage detecting means in the passage path, and a folding paper passage detection signal as an output signal from the paper passage detecting means is input to the comparison / determination section of the abnormal signal output means. At the same time, a pulse signal corresponding to the operation speed of the rotary press is output from the pulse signal output means, and the pulse signal is input to the comparison / determination unit of the abnormal signal output means.

The period of the folding paper passing detection signal, that is, the number of pulses of the pulse signal in the folding paper sending cycle is counted in the comparison / determination unit.

Since all operations of the printing unit and folding unit are performed in communication,
The feeding period of the folding paper is inversely proportional to the operating speed of the rotary press, and the number of pulses per unit time of the pulse signal from the pulse signal output means is proportional to the operating speed of the rotary press. Therefore, the number of pulses of the pulse signal in the feeding period of the folding paper is
Usually it is a fixed number. Then, preset values related to the certain number are stored in advance in the comparison determination unit.

The comparison / determination section compares and determines the number of pulses to be counted with the predetermined number, and outputs an abnormal signal when the number of pulses reaches a predetermined relational value with respect to the preset value.

Therefore, when the folding paper is normally sent out from the folding mechanism, the number of pulses counted is a fixed number and does not reach a predetermined value related to the preset value. No abnormal signal is output from the output means.

However, abnormal feeding of the folding paper from the folding mechanism,
That is, when the feeding of the folding paper is stopped or a stagnation occurs in the passage of the folding paper, the input of the folding paper passing detection signal to the abnormality signal output means is stopped or interrupted. As a result, the number of counted pulses increases and reaches a predetermined relation value with respect to the preset value. Then, an abnormal signal is output from the comparison determination unit, that is, the abnormal signal output unit.

The abnormal signal is used, for example, as an input signal to an emergency stop device for a rotary press, an abnormal alarm device, or the like, and as a result, the rotary press is stopped urgently or an abnormal alarm is reported to an operator.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

A rotary press to which the present invention is applied is schematically illustrated in FIG.

The rotary press comprises at least one printing station P and at least one printing station.
, And the printing sections P, P... And the folding sections F, F are respectively driven by the drive spindles MS driven by the electric motors M, M. .. Are simultaneously driven.

The folding section F has a saw cylinder CC for cutting and folding the web material paper W printed by the printing section P as shown in FIG.
A pair of folding cylinders FC are provided adjacent to each other, and the saw cylinder CC and the folding cylinder FC are driven to rotate in the direction of the arrow in FIG.

As shown in FIG. 1, the abnormality detecting device includes a pulse signal output unit 1 that outputs a pulse signal according to the rotation of the drive spindle MS of the rotary press, for example, a pulse signal transmitter, an encoder, and the like, and the passage of the folding paper S. And an abnormal signal output means 3 for individually detecting the paper passage.

The pulse signal output means 1 includes an input shaft 12 connected to a drive spindle MS of a rotary press via, for example, a gear mechanism 11, and the paper passage detecting means 2 includes a folding part F as shown in FIG. Torso
It is composed of a light projector 21 and a light receiver 22 which are arranged immediately below the FC and opposed to each other with the passage path of the folding paper S therebetween. As the paper passage detecting means 2, a mechanical detecting means or other appropriate detecting means can be used in place of the combination of the light projector 21 and the light receiver 22.

The abnormal signal output means 3 includes a comparison determination unit 31 and a comparison determination unit 31.
And a preset value input unit 32 for inputting a preset value to the storage unit.The comparison determination unit 31 is configured to store the preset value from the preset value input unit 32, but includes a preset value fixed storage unit. , The preset value input unit 32 may be omitted.

The comparison determination unit 31 is connected to the pulse signal output unit 1 and the light receiver 22 so that the pulse signal from the pulse signal output unit 1 and the output signal from the light receiver 22 are input.

The abnormal signal output means 3 is connected to input an abnormal signal to, for example, a rotary press emergency stop device, an abnormal alarm device, or the like.

 The operation of the abnormality detection device will be described.

First, in the operation of the rotary press, the drive main shaft MS is rotationally driven by the electric motors M, M..., And the rotation causes the printing units P, P. , F ・ ・ ・
Are simultaneously driven. Therefore, the web stock paper W printed by the printing unit P includes a saw cylinder CC and a folding cylinder that are rotationally driven to face each other.
The paper is sent to the FC, cut into fixed lengths, folded, and sequentially sent out periodically as folding paper S, S.

For example, each time the folding cylinder FC makes a half turn, one piece of the folding paper S folded to a quarter of the circumference of the folding cylinder is sent out. Accordingly, the folding paper S is rotated by the rotation of the folding cylinder FC, so that the circumference of the folding cylinder is approximately equal to the length of the folding cylinder.
It is sent out intermittently at 1/4 length intervals.

Then, while the fed folding paper S passes between the light emitter 21 and the light receiver 22, the light beam from the light emitter 21 to the light receiver 22 is blocked, and the light emitter 21 is spaced only by the interval of the folding paper S. From the light reaches the light receiver 22. Then, a voltage is generated only while the light receiver 22 receives light, and the voltage disappears while the light beam to the light receiver 22 is cut off.

Then, the sudden voltage change is detected by the paper passage detecting means 2.
Output signal from the folding paper detection signal,
The signal is input to the comparison determination unit 31 of the abnormal signal output unit 3.

On the other hand, from the pulse signal output means 1, the motors M, M,.
A pulse signal corresponding to the rotation of the drive spindle MS is output, and the pulse signal is input to the comparison / determination unit 31 of the abnormal signal output unit 3 and counted by the comparison / determination unit 31. The counting of the pulse signal is reset by one of the voltage generation and the voltage disappearance in the folding paper passage detection signal. That is, the pulse number Pn of the pulse signal in the passing period T and the feeding period T of the folding paper S is counted.

Since all the operations of the printing unit P and the folding unit F are performed by the rotational drive of the drive spindle MS, the sending period T of the folding paper S is inversely proportional to the rotational speed of the drive spindle MS and the number of revolutions per unit time,
The number of pulses per unit time of the pulse signal from the pulse signal output means 1 is proportional to the rotation speed of the drive spindle MS and the number of rotations per unit time. Therefore, the pulse number Pn of the pulse signal in the passing period and the sending period T of the folding paper S is usually a fixed number N
It is.

Then, the comparison discriminating section 31 has a preset value M that is appropriately larger than the predetermined number N inputted and stored by the preset value input section 32 in advance.

The comparison determination section 31 compares and determines the pulse number Pn with the preset value M, and outputs an abnormal signal from the abnormal signal output means 3 when the pulse number Pn is equal to or greater than the preset value M.

FIG. 3 shows the temporal relationship between the various signals described above.

Therefore, when the folding sheet S is normally sent out from the folding section F, the pulse number Pn is a fixed number N and smaller than the preset value M. Is not output.

However, abnormal feeding of the folding paper S from the folding section F,
That is, when the feeding of the folding paper S is stopped or the stagnation occurs in the passage of the folding paper S, the abnormal signal output means 3
The input of the folding paper passage detection signal to the stoppage is stopped or interrupted.
As a result, the reset of the count of the pulse signal is not performed or delayed, so that the pulse number Pn increases and reaches the preset value M. Then, an abnormal signal is output from the abnormal signal output means 3 and input to, for example, an emergency stop device for a rotary press, an abnormal alarm device, or the like. As a result, the emergency stop of the rotary press or an abnormal alarm is reported to an operator.

〔The invention's effect〕

In the abnormality detecting device for detecting an abnormality in sending out the folding paper in the folding mechanism of the rotary press according to the present invention, the paper passing detecting means is perpendicular to the conveying direction in the path of the folding paper downstream of the folding mechanism. Is installed only on a single passing line, does not require a lot of paper passage detecting means, and has a simple configuration that does not require many components in the comparison and discrimination unit. In the case of paper, regardless of the length of the folding paper in the feeding direction and regardless of the moving speed, that is, even when the operation speed of the rotary press changes, adjustment according to the operation speed is unnecessary. In addition, since it is not necessary to output a timing signal that matches the operation timing of the rotary press, it is not necessary to adjust the matching between the output of the timing signal and the paper detection signal, and the possibility of malfunction is extremely small and the reliability is high. Normal detection is performed.

Further, with the simple configuration as described above, it is also possible to reliably detect an abnormality in the feeding of the folded paper upstream and downstream of the paper passage detecting means.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an abnormality detection device for a rotary press in an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a rotary press in an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a time relationship diagram of various output signals of the abnormality detection device for a rotary press in FIG. 1: pulse signal output means, 2: paper passage detection means 3: abnormal signal output means, 11: bevel gear mechanism, 12: input shaft 21: light emitter, 22: light receiver, 31: comparison discriminator 32: preset value input , P: Printing unit, F: Folding unit M: Motor, MS: Drive spindle, G: Gear box CC: Saw cylinder, FC: Folding cylinder, W: Web paper, S: Fold paper

Claims (1)

(57) [Claims] 1. A pulse signal output means for outputting a pulse signal corresponding to an operation speed of a rotary press, detecting the passage of a fold paper sequentially sent from a folding mechanism of the rotary press, and passing one fold paper. A paper passage detecting means installed only on a single passing line perpendicular to the conveying direction in the passage path of the folding paper downstream of the folding mechanism so as to output a folding paper passage detection signal every time, a pulse signal The pulse signal from the output means and the folding paper passage detection signal from the paper passage detection means are connected so as to be inputted, the continuous pulse number of the inputted pulse signal is counted, and the folding paper passage detection signal is detected. By resetting the count value for each input, the number of pulses of the pulse signal during the output interval of two successive folding paper passage detection signals is counted, and during the output interval of the two folding paper passage detection signals, Counted Comparing the number of pulses with a preset value appropriately larger than the number of pulses of the pulse signal in the output interval of two successive folding paper passage detection signals in the normal passage state of the folding paper that is input and stored. An abnormality signal output means having a comparison / determination section for outputting an abnormality signal when the count value reaches a preset value, and an abnormality detection device for detecting an abnormality in feeding of the folding paper in the folding mechanism of the rotary press. .