JPH06321398A - Safety control method - Google Patents

Abstract

PURPOSE:To increase the safety of a weaving machine and prevent operability from being lowered without continuing long period of continuous non-operating condition of an objective device by releasing the operation-prohibition condition of the objective device when the non-detection condition of an object is continued for a specified period of time after the operation of the objective device has been prohibited. CONSTITUTION:When a safety device 1 is assembled into a cross-roll exchange device 10 of a weaving machine 9 and all sensors 3 to 6 are in non-obstacle detection condition within a specified period after cut down signal is inputted from a weaving machine control part 8, a control part 2 outputs a start command to the cross-roll exchange device 10 while the operation of the weaving machine 9 is continued. Also when either of the sensors 3 to 6 comes in detect condition during the input of the cut down signal, the operation of the weaving machine 9 is continued, and the start command to the cross-roll exchange device 10 is not outputted and the output is waited. Then all the sensors comes in non-detection condition and, after more than a specified time has continued, the start command signal is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a safety device attached to a loom or the like.

[0002]

2. Description of the Related Art In a safety device such as a loom, a sensor is provided in order to monitor an operation area of a target device such as a loom. When the sensor detects an obstacle at a monitoring time, the operation of the target device is performed. The operation of the target device is immediately started when the start is stopped or the operation is stopped and thereafter, when the obstacle is not detected.

For example, Japanese Patent Laid-Open No. 5-25740 discloses a safety device relating to a cross roll changing device.
In the safety device, when the control computer inputs the cross roll exchange signal, the area sensor provided on the pair of full cross roll pushing members is operated, and if the area sensor detects an obstacle, the alarm device is activated. , The drive motor for the full cross roll pushing member is set in a non-operating state.

When the obstacle is removed, the drive motor operates and the alarm device stops the alarm operation. Further, when the area sensor detects an obstacle during the operation of the full cross roll pushing member, the control computer stops the drive motor and activates the alarm device, and when the obstacle disappears, the drive motor is activated again. , The alarm device is stopped.

Further, Japanese Patent Laid-Open No. 1-306655 discloses
A safety device for a loom is disclosed. If the safety device detects an intruder by a sensor that monitors the movable area of the reed when the defective yarn removing device completes the weft yarn processing,
When the loom is not started and the sensor does not detect an intruder, the loom is reversed, and then the loom is started.

[0006]

[Problems of the Prior Art] According to the above prior art, since the target device is activated immediately when the obstacle is removed,
There is a risk when the target device starts operating. In other words, without the operator recognizing that the target device is about to operate,
When working, the worker may temporarily leave the sensor monitoring position and immediately enter the operating area of the target device, which is a dangerous condition. In order to avoid this danger, when an obstacle is once detected, the operation of the target device is prohibited, and it is configured to wait for a manual start command,
The operating rate of the target device decreases.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a safety device such as a loom by prohibiting the operation of the target device and then releasing the operation prohibited state of the target device under an appropriate condition. It is to eliminate the danger to the target device and at the same time eliminate the unnecessary stoppage of the target device.

[0008]

According to the above object, the method of the present invention is provided in a target device such as a loom, a cross roll changing device and a machine setting device, and an obstacle is detected in an operation area of the target device at a monitoring time. By stopping the operation start of the target device or stopping the operation of the target device when
In a safety device that prohibits the operation of the target device, after the operation of the target device is prohibited, when the non-detection state of the obstacle continues continuously for a predetermined time, the prohibition state of the operation of the target device is released, While improving safety, it also prevents a drop in operating rate.

[0009]

[Embodiment 1] This embodiment 1 is an example in which a cross roll exchanging device of a loom is a target device and a safety device is incorporated therein, and an example in which a necessary operation is executed by software. FIG. 1 shows the configuration of the safety device 1. The safety device 1 includes a control unit 2 such as a microcomputer in order to control necessary operations. The control unit 2 inputs a sensor signal from one or more of, for example, four sensors 3, 4, 5 and 6 in order to detect a dangerous state, and also a loom stop signal and a stock removal signal from the loom control unit 8. And the like, and also outputs an alarm to the alarm device 7, a start command and a stop command to the cross roll exchanging device 10, and outputs a warning command to the clock counter 11 and the clock counter 12 in order to measure predetermined times T1 and T2. Connected, and count values t1 as their outputs,
Enter t2. The count value t1 corresponds to the time when the sensor is in the non-detection state during the input of the inventory signal, and the count value t2 corresponds to the time from the input of the inventory signal.

Next, FIG. 2 shows a state in which the sensors 3, 4, 5 and 6 are incorporated in the cross roll exchanging device 10 of the loom 9. In the loom 9, the cloth 13 is guided by a plurality of guide rolls 15, a take-up roll 16 and the like supported between a pair of loom frames 14, and is wound around a lower cross roll 17. The cross roll 17 rides on the two rotary rolls 19 of the winding device 18, and the rotary roll 19 located at the rear of the rotary rolls 19 is placed.
Is driven in the winding direction at a predetermined speed.

The cross roll exchanging device 10 moves the cross roll 17 in the completed winding state (full winding) to the front pedestal 20 and removes the cross roll 17 in an empty state.
A pair of push-out members 21 are provided for feeding onto the rotating roll 19 of the book. A pair of pushing members 21
Are rotatably supported by the fulcrum shaft 22 with respect to the loom frame 14, and together with the stopper 23 provided on the loom frame 14 at the upper open portion, receive an empty cross roll 17 and push out the pushing member 21. At the time of rotation, the lower extruding portion 24 pushes the cross roll 17 in the completed winding state toward the pedestal 20.

The sensors 3, 4 and 5 monitor the presence or absence of obstacles in the moving regions of the empty cross roll 17 and the cross roll 17 in the completed winding state due to the operation of the pushing member 21. For example, it is composed of a pair of a light projector and a light receiver, which are provided so as to face the pair of loom frames 14 and detect the presence or absence of an obstacle in the moving region of the cross roll 17.

The sensor 6 is, for example, a limit switch, and is provided between the receiving plate 26 supported by the spring 25 on the receiving base 20 and the upper surface of the receiving base 20, and the sinking of the receiving plate 26 is performed. To detect obstacles. The sensor 6 can also be configured by a sheet-shaped switch provided on the pedestal 20 or a photoelectric sensor having a monitoring area above the pedestal 20.

A cutter 28 for separating the cloth 13 on the side of the loom 9 from the cloth roll 17 in the completed winding state is provided between the winding device 18 and the pedestal 20. A winding nozzle 27 is provided for winding the cut cloth 13 onto the empty cross roll 17 at the start of winding.

Next, FIG. 3 shows a flow chart of the basic operation of the safety device 1, and FIG. 4 shows a flow chart attached to the safety operation. And
FIG. 5 shows a time chart corresponding to the presence or absence of an obstacle and a time chart when the loom is stopped.

First, the operation of FIG. 3 is as shown in A of FIG.
When none of the sensors 3, 4, 5, and 6 is in the non-detection state for a predetermined time T1 from the input of the stock removal signal, a start command to the cross roll exchanging device 10 is issued while the operation of the loom 9 is continued. When any one of the sensors 3, 4, 5 and 6 is in the obstacle detection state during output of the signal, as shown in FIG. 5B, while the loom 9 continues to operate, The cross roll exchanging device 10 stands by without outputting a start command, and then all the sensors are in a non-detection state,
When the state continues for a predetermined time T1 or more, a start command is output, and when the sensor is not in the non-detection state for the predetermined time T1 even after the predetermined time t2 has elapsed since the input of the cutting signal, the loom Is an example of stopping.

The flowchart of FIG. 3 will be described below step by step. After the input of the stock removal signal, in the first step 1, an alarm output is output to the alarm device 7 to notify that the cross roll exchanging device 10 is about to operate, and the monitoring period starts. In the next step 2, it is determined whether or not a stop command is output to the loom 9, and if it is output, the process jumps to step 8, where the clock counter 11 is reset and stopped to end the operation. To do.

When the stop command is not output in step 2, the presence / absence of the obstacle is judged by the presence / absence of the sensor signals from the sensors 3, 4, 5 and 6 in step 3, and when the obstacle is not present, In step 4, the operation status of the clock counter 11 is judged, and if it is in operation, step 6
If it is not operating again, the clock counter 11 is operated in step 5 and the process proceeds to step 6.

Then, in this step 6, the count value t1 of the clock counter 11 and the predetermined time T1 preset on the program are compared in magnitude to determine the count value t1.
Is not longer than the predetermined time T1, steps 2 to 4 and step 6 are repeated. When the count value t1 becomes larger than the predetermined time T1, a start command is output to the cross roll exchanging device 10 in the next step 7, and then the clock counter 11 is reset in step 8 to be in the stopped state. Is set,
The operation when there is no obstacle in A of FIG. 5 ends.

When an obstacle is detected in step 3, in the next step 9, the clock counter 11 is operating? When the obstacle is detected when the judgment is made and the operation is not performed, that is, when the cutting signal is input, the process returns to step 2, but when the operation is being performed, that is, the cutting signal is input. When the obstacle is not detected at the point of time, but the state is not continued for the predetermined time T1 after that, in the next step 10, it is reset and stopped, and then the process returns to step 2. . In this way, when there is an obstacle, the control unit 2 does not output a start command as in B of FIG.
When all the sensors 3, 4, 5 and 6 are in the non-detection state continuously over 1, the cross roll changer 1
A start command is output to 0.

Next, referring to FIG. 4, the monitoring time starts when the stock removal signal is input, the clock counter 12 is set to the operating state in the first step 1, and the following step 2 is performed.
The comparison of the count value t2> predetermined time T2 is performed, and when this is not established, it is determined in the next step 3 whether or not a start command to the cross exchange device is output, and the start command to the cross roll exchange device 10 is issued. If so, in step 4, the clock counter 12 is reset and the operation is stopped, and the process ends.

When there is no start command in step 3, the process returns to step 2 and steps 2 and 3 are repeated. In step 2, when the count value t2 is larger than the predetermined time T2, a stop command is output to the loom 9 in the following step 5, and in the next step 6, another indication indicating that there is an obstacle to the cross exchange device is displayed. After the alarm is output,
Go to step 4, reset the clock counter 12,
A stop operation is performed.

In this way, when the start command is not output to the cross roll exchanging device 10 within another predetermined time T2 which is larger than the predetermined time T1 from the input of the stock removal signal, as shown in C of FIG. The loom 9 is stopped, an alarm is output, and the operator waits until a start command is input by the operator. It should be noted that the predetermined time T2 is preset in the program, and by continuing the weaving even after the output of the uncut signal, the cloth roll 1 in which the winding length of the cloth 13 is fully wound is obtained.
The time is set so that the winding allowable range of 7 is not exceeded. The predetermined times T1 and T2 may be fixedly set, but may be arbitrarily changed by setting a changing program.

[0024]

Second Embodiment FIG. 6 shows an example in which the controller 2 is executed by hardware. The sensor signals of the sensors 3, 4, 5, 6 are input to one of the AND gates 31 via the OR gate 29 and the knot circuit 30. The AND gate 31 operates the one-shot circuit 32 when the AND signal is input to the other input and the AND condition is satisfied, sets the counter 33 to the set state, and counts the clock pulse sent to the other input end. The counter 33 has t1 = T1
At this point, a start command is issued to the cross roll exchanging device 10.

The counter 37 is set and counts clock pulses at the time of input of the cutting signal. When t2 = T2, the counter 37 issues a loom stop command and stands by. The counter 33 is set to the reset state by the OR gate 35 by the output of the one-shot circuit 34, the output of the counter 33, or the output of the counter 37 which receives the sensor signal. Also, the counter 3
7 is set to a reset state by the OR gate 36 by the output of the counter 33 or the output of the counter 37.

[0026]

[Other Embodiments] In the above embodiment, even if the sensors 3, 4, 5 and 6 do not detect obstacles at the time of generation of the stock removal signal, the non-detection state of the predetermined time T1 is confirmed, and thereafter, The start command is output to. However, if the sensors 3, 4, 5, and 6 do not detect obstacles at the time of input of the stock removal signal, the start command may be output immediately. Of course, if the sensors 3, 4, 5, and 6 detect obstacles at the time of stocktaking, even if the sensors 3, 4, 5, and 6 are in the non-detection state after that, no start command is output. If it is not continued for a predetermined time, the start command is not output.

Instead of measuring a predetermined time, a predetermined number of picks or a predetermined weaving length can be used as a parameter. Of course, these parameters are also included in the concept of time.

The safety device 1 can also be applied to other target devices such as a loom or a machine setting device. For example,
When the defect removing device of the loom completes the processing of the weft thread, when the sensor that monitors the movable area of the reed detects an intruder,
It is prohibited to restart the loom. Then, when the sensor goes into a non-detection state and continues for a predetermined time, the loom may be reversed and automatically started.

In the first embodiment, the sensors 3, 4, 5 and 6 do not monitor obstacles once the start command is output. Because, when the cross roll 17 in the winding completion state is pushed out, the cross roll 17 then moves to the cradle 20 by its own weight, and then the movement of the cross roll 17 in the winding completion state is stopped. Because you cannot do it.

Strictly speaking, however, it takes some time from the start of extrusion until the cross roll 17 in the winding completed state moves by its own weight. Therefore,
When the sensor 6 detects an intruding object within a predetermined time T3 from the output of the start command, the operation of the cross roll exchanging device 10 is stopped, and thereafter, the sensors 3, 4, 5, and 6 are in a non-detection state. The activation command may be output again when the operation is continued for a predetermined time.

It should be noted that the monitoring time is the displacement during the operation of the transfer device constituting the machine-moving device if the pushing member starts or is in operation, and if it is a safety device for the machine-operating device. A safety device that stops the start of the loom when there is a space for people to go in is also a safety device that stops the loom after the completion of weft thread processing and when an intruder is detected in the movable area of the reed. Then, the loom is in operation.

[0032]

According to the present invention, in the safety device, when the non-detection state of the sensor for monitoring the operation area of the target device continues for a predetermined time, the operation prohibition for the target device is released. The safety of is improved.
Further, the state in which the target device does not continuously operate does not continue for a long time, and the operating rate does not decrease.

[Brief description of drawings]

FIG. 1 is a block diagram of a safety device.

FIG. 2 is a schematic vertical sectional view of a cross roll changing device of a loom.

FIG. 3 is a flowchart of a monitoring operation.

FIG. 4 is a flowchart of a monitoring operation.

FIG. 5 is a time chart diagram of a monitoring operation.

FIG. 6 is a block diagram of a safety device according to another embodiment.

[Explanation of symbols]

 1 Safety Device 2 Control Section 3 Sensor 4 Sensor 5 Sensor 6 Sensor 7 Alarm 8 Loom Control Section 9 Loom 10 Cross Roll Exchanger 11 Clock Counter 12 Clock Counter

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D03J 1/24 7152-3B

Claims (2)

[Claims] 1. A safety device, which is provided in a target device such as a loom, a cross roll changing device, and a machine setting device, and prohibits the operation of the target device when an obstacle is detected in an operation area of the target device at a monitoring time. 2. In the safety control method, after the operation of the target device is prohibited, the operation prohibited state of the target device is released when the non-detection state of the obstacle continues for a predetermined time. 2. A safety device which is provided in a cross roll changing device of a loom and which prohibits the operation of the cross roll changing device when an obstacle is detected in the operation area of the cross roll changing device at the monitoring time. After the operation of the exchange device is prohibited, when the obstacle non-detection state continues for a predetermined time, the operation prohibition state of the cross roll exchange device is released, and the above predetermined time has elapsed from the time of inputting the cut-off signal to the cross roll exchange device. When the start command is not output to the cross roll exchanging device within another predetermined time larger than, the loom is stopped, an alarm is output, and the loom is made to wait until the start command is input by the operator. Safety control method characterized by.