JP2547651Y2 - Paper jam detector of folder - Google Patents

Description

[Detailed description of the invention]

[0001]

In this invention, a sensor is provided so as to be separable from a main circuit, and this sensor is arranged at a predetermined position to detect the presence or absence of a flowing signature. The present invention relates to a paper jam detecting device of a folding machine that determines a paper jam at a location.

[0002]

2. Description of the Related Art Recently, in a folding machine of a rotary printing press, a paper jam detector for judging a paper jam and stopping the machine is used as a safety device. In this paper jam detector, for example, a photoelectric sensor is provided so as to be detachable from the main circuit by a connector or the like, and this photoelectric sensor (transmission type) is disposed at each position where paper jam is likely to occur, and the flow is detected by these sensors. The presence or absence of a signature is to be detected. Then, based on the detection results (sensor signals) of these sensors, a paper jam (paper misalignment) at each location is determined, and based on the determination result, a paper jam is displayed at each location and the machine is stopped. It is assumed. In this paper jam detector, the operation for judging the paper jam starts by detecting the presence or absence of a signature that flows first. That is, a sensor signal which rises to the “H” level when there is a signature and falls to the “L” level when there is no signature is obtained,
A paper jam determination operation is started with the first rising edge to the “H” level and the falling edge to the “L” level of the sensor signal as a trigger.

[0003]

However, according to such a conventional paper jam detector, when the power is turned on while the photoelectric sensor is disconnected from the main circuit, no abnormality is detected. That is, the photoelectric sensor is often disconnected from the main circuit for cleaning or the like, and after disconnection, the connection to the main circuit may be forgotten. In such a state, when the power is turned on and the function of the paper jam detector is activated, the sensor signal rises to “H” level as its initial state, but the reset operation is performed.
As a result , the rise to the “H” level is not detected , and the paper jam determination operation is not started. If a paper jam determination operation is started here, a paper misalignment is eventually detected, a paper jam is displayed, and the machine stops. However, since the operation for judging a paper jam is not actually started as described above, the signature continues to flow unprotected in a place where the photoelectric sensor is not disposed. Cannot be detected.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a connection terminal with a sensor.
Separately, first and second terminals are provided on the connector, and
First and second connector blocks on the sensor side of the
A direct connection between the second terminal and the main circuit of the connector
To the first terminal of the connector block on the side
Connect the connection status detector and connect the connector on the main circuit side of the connector.
Ground the second terminal of the block and secure the connector
Sensor block and main circuit side connector block.
When the power is turned on, the signal output from the connector connection status detector depends on whether the connector is connected or disconnected.
Is obtained by the so that with different issue.

[0005]

Therefore, according to the present invention, when the power is turned on, if the sensor is disconnected from the main circuit, the sensor becomes the main circuit.
Signals different from those connected to the circuit
Output from the connector connection status detector.
In response to the output from the condition detector , the device can be stopped or an alarm can be issued.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a paper jam detecting device according to the present invention will be described in detail. FIG. 2 is a front view showing an indicator unit in one embodiment of the paper jam detecting device. On this indicator section 1, a pattern 1-1 indicating the arrangement state of the photoelectric sensor in the folding machine is drawn, and in this pattern 1-1, corresponding to symbols A to E indicating the arrangement location of the photoelectric sensor. In addition, paper presence indicator lamps 1-2A to 1-2E and shift amount display units 1-3A to 1-3E are provided. The indicator unit 1 has alarm lamps 1-4A to 1-4E corresponding to symbols A to E indicating the locations of the photoelectric sensors.
And adjustment knobs 1-5A to 1-5E. Further, the indicator section 1 is provided with an operation mode switching knob 1-6. By switching the position of the knob 1-6, the on mode is set as the first mode, and the reset mode is set as the second mode. The test mode can be selected as the third mode.

FIG. 1 is a block diagram showing a main part of a paper jam detecting device provided with the indicator unit 1. As shown in FIG.
In the same figure, 2-A is a photoelectric sensor arranged at a location indicated by a symbol A, and 3-A is a displacement signal generation circuit 100-A using the photoelectric sensor 2-A as a main circuit. Connector for detachable connection, 4 is this machine (not shown)
Is a rotary encoder that generates a pulse signal corresponding to the amount of rotation of 5, a phase shift detector, 6 is an OR circuit, 7 is a relay, 8 is an operation mode changeover switch, and 9 is a reset switch.

The operation mode changeover switch 8 is set to a connection state shown by a solid line in the on-mode according to the switching position of the operation mode changeover knob 1-6, and is shown by a broken line in the test mode. It becomes the connection status.
The reset switch 9 is turned on when the reset mode is set according to the switching position of the operation mode switching knob 1-6.

The connector 3-A has a six-terminal structure. The first terminal 3-A1 and the second terminal 3-A2 are connected to the connector block 3-AA on the photoelectric sensor 2-A side.
Are directly connected by a jumper wire 10-A. The light emitting element ( light emitting diode) FDA of the photoelectric sensor 2-A is connected between the third terminal 3-A3 and the fourth terminal 3-A4 of the connector 3-A.
A light receiving element (phototransistor) FTA is connected between -A5 and the sixth terminal 3-A6.

The shift amount signal generation circuit 100-A includes a timing generation circuit 11-A, a paper presence synchronization signal generator 12-A.
A, a paperless synchronization signal generator 13-A, exclusive OR circuits 14-A and 15-A, a sensor level detection circuit 16-A,
Light intensity switching circuit 17-A, buffer 18-A, paper indicator lamp 1-2A, alarm lamp 1-4A, resistor R1-
A, R2-A. The exclusive OR circuit 14- of the shift amount signal generation circuit 100-A
A, 15-A output the "H" level signal (shift amount signal) to the phase shift detector 5,
Is supplied to the timing generation circuit 11-A, the paper-present synchronizing signal generator 12-A, and the paper-less synchronizing signal generator 13-A. The input end of the buffer 18-A is connected to the first terminal 3-A1 from the connector block 3-AB side, and the output of the buffer 18-A is supplied to the OR circuit 6. The other end of the OR circuit 6 is supplied with a stop signal from the phase shift detector 5 via the operation mode switch 8.

In FIG. 1, a photoelectric sensor 2-
A and only the connection configuration of the shift amount signal generation circuit 100-A to the photoelectric sensor 2-A is shown in FIG.
, Photoelectric sensors 2-B to 2-E (not shown) arranged at locations indicated by symbols BE, and a shift amount signal generation circuit 10 for the photoelectric sensors 2-B to 2-E.
The connection configuration of 0-B to 100-E (not shown) is the same, and exclusive OR circuits 14-B to 14-E, 15
-B to 15-E (not shown) are supplied to the phase shift detector 5, and the stop signals from the phase shift detector 5 are output from the timing generation circuits 11-B to 11-E,
It is supplied to the paper-existing synchronizing signal generators 12-B to 12-E and the paper-less synchronizing signal generators 13-B to 13-E (not shown), and to the buffers 18-B to 18-E (not shown). The output is given to the OR circuit 6.

Hereinafter, the operation of the paper jam detecting device will be described with reference to the functions of the respective components.

When the signature passes between the light emitting element FDA and the light receiving element FTA of the photoelectric sensor 2-A, the light receiving element FTA is turned off when there is a signature, and the light receiving element FTA is turned on when there is no signature. Become. Thereby, the potential at the connection point between the resistor R2-A and the light receiving element FTA is used as a sensor signal,
The timing generating circuit 11-A sends a paper start command and a paper no start command using the first rising edge of the sensor signal to the “H” level and the falling edge to the “L” level as a trigger. In response,
The paper presence synchronization signal generator 12-A and the paper absence synchronization signal generator 13-A generate a paper presence synchronization signal and a paper absence synchronization signal in which "H" level and "L" level alternate.
The generation cycle and time of the paper-present synchronizing signal and the paper-less synchronizing signal change according to the rotation speed of the apparatus.

The paper presence synchronization signal generated by the paper presence synchronization signal generator 12-A is supplied to one end of an exclusive OR circuit 14-A. The paperless synchronization signal generated by the paperless synchronization signal generator 13-A is supplied to one end of an exclusive OR circuit 15-A. The other ends of the exclusive OR circuits 14-A and 15-A are branched and supplied with the sensor signal supplied to the timing generation circuit 11-A.

Normally, since the phase shift between the sensor signal and the paper-present synchronizing signal and the paper-less synchronizing signal is small, the shift amount signals output from the exclusive OR circuits 14-A and 15-A are phase -shifted. short.

On the other hand, when the phase shift between the sensor signal and the paper-present synchronizing signal and the paper-out synchronizing signal becomes large, the shift amount signals output from the exclusive OR circuits 14-A and 15-A become phase -shifted. Become longer.

The phase shift detector 5 uses a shift amount display section 1-3A to determine the extent of the shift based on a shift amount signal input for each signature in four stages. Is displayed.

When the degree of display on the shift amount display section 1-3A increases and the shift amount signal is generated for a predetermined phase length or more, the phase shift detector 5 judges this as a paper jam and operates in the operation mode. A stop signal is output via the changeover switch 8. This stop signal passes through the OR circuit 6. As a result, the relay 7 is driven, and the operation of the apparatus is stopped. The stop signal is supplied to the timing generation circuit 11-A, the paper-existing synchronizing signal generator 12-A, and the paper-less synchronizing signal generator 13-A to stop the basic function of the deviation amount signal generating circuit 100-A. .

In the paper jam detecting device which performs such a basic operation, the photoelectric sensor 2-A is separated from the shift amount signal generating circuit 100-A, that is, the connector block 3-AA is separated from the connector block 3-AB. Let's assume that the power is turned on in a disconnected state.

In this case, although the sensor signal rises to the "H" level as its initial state, the timing generation circuit 11-A does not detect the rise of the sensor signal to the "H" level due to the reset operation . The start command with paper and the start command without paper are not sent. That is, the operation for determining a paper jam is not started.

However, in this embodiment, when the connector block 3-AA is disconnected from the connector block 3-AB, the connection by the jumper wire 10-A is released, so that the terminals 3-A1 and 3-A2 are opened. Is done. Therefore, when the power is turned on, the output of the buffer 18-A becomes "H" level, that is, the connector connection status detector
The output of the buffer 18-A becomes "H" level.
Ri, the stop command "H" level is assumed to pass through the OR circuit 6, thereby the relay 7 is driven,
The operation of this machine is forcibly stopped.

As described above, according to the present embodiment, the photoelectric sensors 2-A to 2-E are connected to the shift amount signal generation circuits 100-A to 100-A.
When the power is turned on while disconnected from 100- E ,
Since this machine is stopped upon detecting this state, the signature does not continue to flow unprotected in a place where the photoelectric sensor is not disposed.

In the above-described embodiment, the apparatus is stopped upon detecting the disconnection state of the photoelectric sensors 2-A to 2-E. However, the state may be warned by an alarm or the like. Good.

In the above-described embodiment, the jumper wire 10-A is used to detect the disconnection state of the photoelectric sensor 2-A. However, various methods other than the jumper wire can be considered.

[0025]

As apparent from the above description, according to the present invention, when the power supply is turned on and the sensor is disconnected from the main circuit , the sensor is connected to the main circuit.
Signal from the connector connection status detector
Output from the connector connection status detector, it is possible to stop the unit or to issue an alarm, and the signature will continue to flow unprotected in places where sensors are not installed. It is possible to prevent it before it happens.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a main part of a paper jam detecting device according to the present invention.

FIG. 2 is a front view of an indicator unit of the paper jam detecting device.

[Explanation of symbols]

 2-A photoelectric sensor 3-A connector 3-AA, 3-AB connector block 5 phase shift detector 6 OR circuit 10-A jumper wire 11-A timing generation circuit 12-A paper synchronous signal generator 13- A Synchronous signal generator without paper 14-A Exclusive OR circuit 15-A Exclusive OR circuit 100-A Shift amount signal generation circuit

Claims (1)

(57) [Scope of request for utility model registration] 1. A sensor is provided on a main circuit so as to be detachable via a connector , and this sensor is arranged at a predetermined location to detect the presence or absence of a signature flowing therethrough. In a paper jam detecting device of a folding machine for judging a paper jam, the first connector is connected to the connector separately from a connection terminal with the sensor.
And a second terminal are provided in a connector block on the sensor side of the connector.
Direct connection between the first and second terminals
It is, put on the main circuit side of the connector block of the connector
A connector connection status detector is connected to the first terminal.
It is, put on the main circuit side connector block of the connector
The second terminal is grounded, and the connector block on the sensor side of the connector is connected to the second terminal.
In the case that is disconnected in the case where the connector block of the main circuit side is connected, at power-on, the connector
A paper jam detection device for a folding machine, wherein signals output from a connection status detector are different .