JP3763623B2 - Safety device for sensitive press starter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic starting device for a press machine using a light safety device, and more particularly to a safety device for automatic starting unintended by an operator.
[0002]
[Prior art]
Conventionally, in order to prevent an accident when a part of the operator's body (for example, a hand) enters the slide operation area during the operation of the press machine, a light beam is used at the entrance to the slide operation area from the outside. Safety devices are installed. And in a specific press machine, there is a thing using this beam type safety device for an automatic starting device. That is, the press machine is automatically activated by a light-shielding detection signal detected by a light safety device, and this is usually called a sensitive press activation device (hereinafter referred to as PSDI). FIG. 6 is a perspective view showing an example of a press machine provided with such a light safety device. The PSDI will be described below with reference to FIG.
[0003]
A bolster 2 is provided at the lower part of the press machine 1, and a lower die 3 is disposed on the upper surface of the bolster 2. In addition, a slide 4 is provided at an upper portion of the press machine 1 and at a position facing the bolster 2 so as to be movable up and down. It is arranged. The work area 6 in which the slide 4 moves up and down is defined as a dangerous area, and other surfaces (side surfaces, etc.) excluding the work surface (usually the front surface of the press machine 1) on which the operator works are intruded from outside. The periphery of the work area 6 is surrounded by a guard or the like. A light beam safety device 7 is disposed on the left and right of the entrance of the work surface. The light beam safety device 7 includes a light projector 7a and a light receiver 7b facing each other.
[0004]
In the normal projector 7a, light emitting elements (for example, light emitting diodes) are arranged in the vertical direction at a predetermined interval A, and in the light receiver 7b, the light receiving elements (for example, photodiodes) are arranged in the vertical direction. Are arranged at the same predetermined interval A. Then, as shown in FIG. 7, a light curtain is formed at the entrance of the work surface in a state where the light emitted from the projector 7a is received by the light receiver 7b. An object (such as an operator's hand) is shielded from light to detect entry into a dangerous area. When a controller (not shown) inputs this detection signal of the light beam safety device 7, if the slide 4 is in operation, the slide 4 is emergency stopped to prevent an accident.
[0005]
On the other hand, in the PSDI using the light safety device 7 as described above, a hand or the like is inserted into the light curtain to temporarily shield the light, and then the state where the light shielding is restored (hereinafter referred to as a break) is detected. An activation signal is generated based on the number of breaks to automatically activate the press machine 1. Normally, the “1 break mode” that is automatically activated by one break and the “2 break mode” that is automatically activated by two breaks can be selected by, for example, a switch with key. This 1-break mode corresponds to, for example, the case where the operator holds the material by hand and places it in the mold and then retracts this hand to the outside of the press machine 1, and the 2 break mode is, for example, pressed. This corresponds to the case where the work is taken out with one hand and taken out, and then the other material is held in the mold with the next material and the hand is retracted outside. Then, the PSDI compares the number of breaks based on the selected break mode, and automatically starts the press machine 1 when this number matches the number of breaks in the setting mode.
[0006]
[Problems to be solved by the invention]
However, in the conventional PSDI, in the 2 break mode, the light is blocked by a part of his / her body (for example, the head or elbow) or the work while the worker is unconsciously engaged in the work. PSDI determines that this break is the first time. In this case, when the operator inserts his hand and thinks it is the first break, PSDI determines this break as the second break and automatically activates the slide 4. At this time, the operator tries to insert a hand into the work area 6 in order to make a second break. For this reason, the worker feels a mental surprise and stress that the press machine 1 suddenly performs an operation different from the one intended by the worker, and the worker's fatigue level increases. There is.
[0007]
In addition, there is a situation in which the operator is too enthusiastic about work or carelessly misunderstood or misunderstood, so that the current mode is the 1 break mode, but the operator is working in the 2 break mode. Also in this case, when the operator tries to insert a hand into the work area 6 with the intention of performing the second break next time, the press machine 1 suddenly operates, and the stress felt by the operator is large. . Therefore, similarly, there is a problem that the fatigue level of the worker increases.
[0008]
The present invention has been made paying attention to the above-mentioned problems, and provides a safety device for a sensitive press activation device that can reduce the fatigue level of an operator due to automatic activation of a press machine different from the intention of the operator. It is an object.
[0009]
[Means, actions and effects for solving the problems]
In order to achieve the above object, the invention according to claim 1 is directed to a light safety device 7 provided at an entrance of a work surface where a worker's hand and / or material enters the work area 6 of the slide 4. In the safety device of the sensitive press starting device that detects the light blocking and the subsequent recovery and automatically starts the press machine 1,
A light-blocking / recovery detection signal of the light-type safety device 7 is input, the number of light-blocking / recovery breaks is counted based on this detection signal, and the break number data, light-blocking / recovery detection signal is output. Frequency counting means 21;
Break mode selection means 22 for selecting any one of a plurality of break modes depending on the number of breaks and outputting a mode signal corresponding to the selected break mode;
Based on the break number data inputted from the break number counting means 21, the light shielding and recovery detection signal, and the mode signal inputted from the break mode selection means 22, the current light shielding signal is immediately before the press machine 1 is started. Determining means 23 for determining whether the signal is a light shielding signal and outputting a change command at the time of the light shielding signal immediately before the start of the press machine 1 ;
A change command for the discrimination means 23 is input, and a light quantity change means 25 for changing the light quantity of the diroom illumination lamp 16 is provided.
[0010]
According to the first aspect of the present invention, the number of times the light beam of the light safety device is shielded and recovered (so-called break frequency) is counted, and the break number data, the light shielding and recovery signal, and the break mode selection means are used. Based on the comparison with the selected mode signal, it is determined whether the current light shielding is the light shielding just before the press machine is started. Then, when it is shielding immediately before startup of the press machine, in order to draw attention to tighten known to workers that the press machine is automatically started by the next recovery operation, changes the light quantity of Dairumu lamp . This makes it possible for the operator to accidentally forget the break mode selected during work, for example, when the light beam of the light safety device is unintentionally blocked by the head, elbow, or material. Even when the press machine is suddenly automatically started by someone other than the operator's significance, the worker's mental surprise and stress are eliminated. As a result, the fatigue level of the operator can be reduced and workability can be improved.
[0011]
The invention according to claim 2 is the safety device for the sensitive press activation device according to claim 1,
The light amount changing means 25 is dimmed to change the light amount.
[0012]
According to the second aspect of the present invention, the light is reduced as the light amount change immediately before the automatic activation, so that the operator can recognize that the press machine is automatically activated. As a result, even if the press machine is suddenly automatically started by someone other than the operator's significance, the worker's mental surprise and stress are eliminated. As a result, the fatigue level of the operator can be reduced and workability can be improved.
[0013]
The invention according to claim 3 is the safety device for the sensitive press activation device according to claim 1,
The light quantity changing means 25 blinks to change the light quantity.
[0014]
According to the invention described in claim 3, since the blinking is performed as the light amount change immediately before the automatic activation, the operator can recognize that the press machine is automatically activated. As a result, even if the press machine is suddenly automatically started by someone other than the operator's significance, the worker's mental surprise and stress are eliminated. As a result, the fatigue level of the operator can be reduced and workability can be improved.
[0015]
Furthermore, the invention according to claim 4 is the safety device for the sensitive press activation device according to claim 1,
The light quantity changing means 25 is brightened to change the light quantity.
[0016]
According to the fourth aspect of the present invention, since the light intensity is increased as the light amount change immediately before the automatic activation, the operator can recognize that the press machine is automatically activated. As a result, even if the press machine is suddenly automatically started by someone other than the operator's significance, the worker's mental surprise and stress are eliminated. As a result, the fatigue level of the operator can be reduced and workability can be improved.
[0017]
The invention according to claim 5 is the safety device for the sensitive press activation device according to claim 1,
When the slide 4 is in a predetermined pressing step and comes to a predetermined position set in advance, or when a predetermined time has elapsed after the light amount of the diroom lighting lamp 16 is changed, A light amount change canceling means 29 for returning the light amount of the die room illumination lamp 16 is provided.
[0018]
According to the fifth aspect of the present invention, either in a predetermined pressing step after the slide is actuated and when the predetermined position is reached, or when a predetermined time elapses after the light quantity of the diroom illumination lamp is changed. On the other hand, the light quantity of the die room illumination lamp is restored. As a result, the light quantity of the diroom illumination lamp becomes equal to that in the normal time, so that the work can be continued safely and the light quantity change at the next automatic activation can be handled. Therefore, a worker's fatigue degree can be reduced and workability | operativity can be improved.
[0019]
Further, the invention according to claim 6 is a method of shielding the light beam of the light-type safety device 7 provided at the entrance of the work surface where the operator's hand and / or material enters the work area 6 of the slide 4 and thereafter. In the safety device of the sensitive press starter that detects the recovery and automatically starts the press machine 1,
A light-blocking / recovery detection signal of the light-type safety device 7 is input, the number of light-blocking / recovery breaks is counted based on this detection signal, and the break number data, light-blocking / recovery detection signal is output. Frequency counting means 21;
Break mode selection means 22 for selecting any one of a plurality of break modes depending on the number of breaks and outputting a mode signal corresponding to the selected break mode;
Based on the break number data inputted from the break number counting means 21, the light shielding and recovery detection signal, and the mode signal inputted from the break mode selection means 22, the current light shielding signal is immediately before the press machine 1 is started. Determining means 23 for determining whether the signal is a light shielding signal and outputting a change command at the time of the light shielding signal immediately before the start of the press machine 1 ;
The configuration includes a color changing unit 34 that inputs a change command of the determining unit 23 and changes the illumination color of the diroom illumination lamp 36.
[0020]
According to the sixth aspect of the present invention, the number of breaks of the light beam of the light beam safety device is counted, and the determination is made based on a comparison between the break number data, the light shielding / recovery signal, and the mode signal from the break mode selection means. However, when the light is interrupted immediately before the press machine is started, the color of the die room lighting is changed to alert the operator. As a result, even if the press machine is suddenly automatically activated by a person other than the worker's significance, the worker's mental surprise and stress are eliminated. As a result, the fatigue level of the operator can be reduced and workability can be improved.
[0021]
The invention according to claim 7 is the safety device for the sensitive press activation device according to claim 6,
When the slide 4 is in a predetermined pressing step and reaches a predetermined position, or when a predetermined time elapses after the illumination color of the diroom lighting lamp 36 is changed The color change canceling means 39 for returning the illumination color of the die room illumination lamp 36 is provided.
[0022]
According to the seventh aspect of the present invention, either in a predetermined pressing step after the slide is actuated and when the predetermined position is reached, or when a predetermined time elapses after the illumination color of the diroom lighting lamp is changed. In either case, the illumination color of the die room illumination lamp is restored. As a result, the illumination color of the diroom illumination lamp becomes equal to that in the normal state, so that the work can be continued safely and the color change at the next automatic activation can be handled. Therefore, a worker's fatigue degree can be reduced and workability | operativity can be improved.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described in detail with reference to the drawings. The configuration of the press machine 1 is the same as that in FIG. 6 described above, and is omitted in the following description.
First, a first embodiment will be described with reference to FIGS.
FIG. 1 is a hardware configuration diagram of a PSDI safety device according to the first embodiment. The light beam safety device 7 outputs a light blocking detection signal to the controller 11 when the light beam between the light projector 7a and the light receiver 7b is blocked by an operator's hand or the like. The break mode changeover switch 12 selects a break mode for determining an automatic activation signal such as “1 break mode” or “2 break mode”, and this mode signal is input to the controller 11.
[0024]
Further, a slide position detecting means 8 is provided for detecting the position of the slide 4 when the slide 4 is operating. The slide position detecting means 8 outputs the detected position signal of the slide 4 to the controller 11. Here, when the press machine 1 is a mechanical press by crankshaft rotation, the slide position detecting means 8 may be constituted by, for example, a rotary cam device or an encoder, and the crankshaft rotation angle may be detected. For example, in the case of a rotary cam device, the position of the slide 4 can be detected by setting the ON range of the output signal of the rotary cam to a predetermined range of the crankshaft rotation angle. Further, when the press machine 1 is a hydraulic press or the like provided with a direct-acting slide 4, the slide position detecting means 8 includes, for example, the position of the slide 4 in the vertical direction by an encoder, and the slide 4 descending process or ascending. The position of the slide 4 can also be detected on the basis of the pressing step of the process and the elapsed time at the upper limit position and the lower limit position of the slide 4.
[0025]
The press activation circuit 14 is a circuit that controls the operation and stop of the slide 4 of the press machine 1, and controls the drive device of the slide 4 based on the operation command and the stop command from the controller 11. The drive device for the slide 4 may be a drive motor for a crank rotation shaft of a mechanical press, or a hydraulic cylinder for a direct acting slide, a direct acting motor, or the like.
[0026]
The light amount changing circuit 15 controls the light amount of the diroom illumination lamp 16 that illuminates the work area 6, and when the light amount change command is input from the controller 11, for example, dimming, increasing light, blinking, etc. Further, the drive circuit 17 outputs an alarm to the alarm device 18 or the display device 19 based on the alarm command or the display command input from the controller 11. The alarm device 18 may be constituted by, for example, a buzzer or a bell, and the display device 19 may be constituted by, for example, a patrol light, a lamp, a character display device, or the like.
[0027]
The controller 11 is composed of, for example, a microcomputer and the like, and includes an input interface circuit for the light beam safety device 7, the break mode changeover switch 12, and the slide position detecting means 8, a press activation circuit 14, a light amount changing circuit 15, and a drive. An output interface circuit with the circuit 17 is provided inside. As will be described in detail below, the controller 11 inputs the light shielding and recovery signal of the light safety device 7, the mode signal of the break mode changeover switch 12, and the slide position signal of the slide position detecting means 8. Then, predetermined processing and determination are performed, and various controls such as the light amount of the die room illumination lamp 16, the output to the alarm device 18 and the display device 19, and the activation of the press machine 1 are performed.
[0028]
Next, a functional configuration block diagram of the PSDI safety device according to the present invention will be described with reference to FIG.
The light beam safety device 7 detects light shielding and recovery of the safety device as described above, and outputs this detection signal to the break number counting means 21. The break number counting means 21 counts the number of breaks based on the light shielding and recovery detection signals and outputs the break number data to the determination means 23. The break mode selection unit 22 sets a break mode related to automatic activation, that is, the number of breaks, and outputs the set number to the determination unit 23.
[0029]
The determination unit 23 compares the break number data input from the break number count unit 21 with the set number input from the break mode selection unit 22, and the operator starts when the break number exceeds the set number. It is determined that there is a will. Then, the determination unit 23 outputs a change command to the light amount change unit 25 and outputs a warning command to the alarm / display unit 27. Based on the change command, the light quantity changing means 25 dims, increases or blinks the diroom illumination lamp 16. Further, the alarm / display means 27 gives an alarm by the alarm device 18 or displays an alarm by the display device 19 based on the warning command. Next, the discrimination means 23 outputs a press activation command to the press activation means 24, and the press activation means 24 operates the slide 4 by the press activation circuit 14 based on this command. Then, after operating for one stroke, the operation of the slide 4 is stopped.
[0030]
Further, the release position detection means 28 outputs the position signal of the slide 4 detected by the slide position detection means 8 to the light quantity change release means 29. Then, the light quantity change canceling means 29 determines whether or not the slide 4 has reached a predetermined position set in advance in a predetermined pressing process based on the input position signal. When it is determined that the light amount has come, a cancel command is output to the light amount changing means 25 to return the light amount of the die room illumination lamp 16 to the original. The light amount change canceling means 29 may return the light amount when a predetermined time has elapsed after the light amount of the diroom illumination lamp 16 is changed.
[0031]
Next, an example of a control flowchart of the PSDI safety device according to the present invention will be described with reference to FIG. In the following flowchart, each processing number is denoted by S. First, in S <b> 1, the determination unit 23 inputs a break mode (set number of times) from the break mode selection unit 22. In S 2, the break number counting means 21 counts the number of breaks based on the light shielding and recovery detection signal from the light beam safety device 7 and outputs the break number data to the determination means 23. Next, in S3, the discriminating means 23 compares the break mode, the inputted number of breaks, and the light shielding / recovery detection signal, and determines whether or not the current light shielding is the light shielding just before the press machine 1 is started. It is determined whether the light is shielded for the second time in the break mode or the first light shielding in the break mode. And when it is not light shielding just before starting of the press machine 1 , it returns to S2 and repeats the above process.
[0032]
Further, when the light is blocked immediately before the press machine 1 is started in S3, the light amount changing means 25 changes the light amount of the diroom illumination lamp 16 to dimm, increase or blink in S4, and informs the operator that it is automatically started. Call for attention. Further, in S 5, the alarm / display unit 27 issues a warning by the alarm device 18 and / or the display device 19. When the determination means 23 reaches the set number of times, the number of breaks counted by the break number counting means 21 is reset. Next, the discrimination means 23 outputs an activation command to the press activation means 24 when a recovery signal after light shielding immediately before the automatic activation is input. Thus, the press activation means 24 activates the slide 4 to activate the press machine 1 for one shot. If the slide 4 reaches a predetermined position during this time, the light quantity change canceling means 29 outputs a cancel command, and returns the light quantity of the diroom lighting lamp 16 to the original. Then, it returns to S1 and repeats the above process.
[0033]
As described above, when the number of breaks reaches the number set in the break mode and can be automatically activated, the diroom illumination lamp 16 is dimmed, dimmed or blinked, or the alarm device 18 and / or A warning is given by the display 19 to alert the operator that automatic activation is to occur. Thus, it is possible to prevent the worker from being automatically activated when the worker does not intend to give stress to the worker. As a result, even if the press machine 1 is automatically started due to an unintentional break of the worker, the fatigue level of the worker can be reduced, and safe and good work can be performed.
[0034]
Next, a second embodiment will be described based on FIG. 4 and FIG. This embodiment has shown the method of calling attention by changing a color instead of changing the light quantity of a die-room illumination lamp.
FIG. 4 is a hardware configuration diagram according to the present embodiment, and the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted here. In the present embodiment, a diroom illumination lamp 36 that can emit two different illumination colors is provided. The diroom illumination lamp 36 is composed of, for example, two different kinds of illumination lamps 36a and 36b. One of the diroom illumination lamps 36a is a white lamp that is normally lit, and the diroom illumination lamp 36b is a red that is lit immediately before the automatic activation. Can be a light. The color change circuit 35 switches the illumination color of the diroom illumination lamp 36 from one to the other based on the change command input from the controller 11.
[0035]
FIG. 5 shows a functional configuration block diagram according to the present embodiment. The same components as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted here. When the break number data input from the break number count unit 21 exceeds the set number from the break mode selection unit 22, the determination unit 23 determines that the operator has a will to start and instructs the color change unit 34 to change the command. And a warning command is output to the alarm / display means 27. Based on the change command, the color changing unit 34 switches the illumination color of the diroom illumination lamp 36 from, for example, white to red. Further, the color change canceling means 39 determines whether or not the slide 4 has come to a predetermined position set in advance in a predetermined pressing process, based on the position signal of the slide 4 input from the release position detecting means 28. When it is determined that the slide 4 has come to a predetermined position, a release command is output to the color changing means 34 to return the illumination color of the diroom illumination lamp 36 to the original white lamp. The light amount change canceling means 39 may restore the illumination color when a predetermined time has elapsed after the illumination color of the diroom illumination lamp 36 is changed.
[0036]
The control flowchart with such a configuration is substantially the same as the flowchart shown in FIG. Here, in S4 of FIG. 3, the color changing means 34 changes the color by switching the illumination color of the diroom illumination lamp 36 from white to red or the like. As a result, since the worker can recognize that the light is shielded immediately before the automatic activation, it is possible to prevent the worker from being automatically activated when the worker does not intend to give stress to the worker. Accordingly, it is possible to reduce the stress and fatigue of the worker, and it is possible to perform a safe work with good workability.
[0037]
In the present embodiment, the illumination color of the diroom illumination lamp 36 is changed by switching between two types of illumination lamps having different illumination colors. However, the present invention is not limited to this, for example, in front of the diroom illumination lamp 36. A colored light-transmitting sheet or the like for changing the illumination color may be provided so as to be freely inserted.
[Brief description of the drawings]
FIG. 1 is a hardware configuration diagram of a PSDI safety device according to a first embodiment of the present invention.
FIG. 2 is a functional configuration block diagram of a PSDI safety device according to the first embodiment of the present invention.
FIG. 3 shows an example of a control flowchart of the PSDI safety device according to the first embodiment of the present invention.
FIG. 4 is a hardware configuration diagram according to a second embodiment of the present invention.
FIG. 5 is a functional configuration block diagram according to a second embodiment of the present invention.
FIG. 6 is a perspective view showing an example of a press machine provided with a light safety device according to the present invention.
FIG. 7 is an explanatory view of a light curtain of a light safety device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Press machine, 2 ... Bolster, 3 ... Lower metal mold, 4 ... Slide, 5 ... Upper metal mold, 6 ... Working area, 7 ... Light safety device, 7a ... Light projector, 7b ... Light receiver, 8 ... Slide position Detecting means, 11 ... controller, 12 ... break mode changeover switch, 14 ... press start circuit, 15 ... light quantity changing circuit, 16 ... diroom lighting, 17 ... drive circuit, 18 ... alarm device, 19 ... indicator, 21 ... Break number counting means, 22 ... Break mode selection means, 23 ... Discrimination means, 24 ... Press activation means, 25 ... Light quantity changing means, 27 ... Alarm / display means, 28 ... Release position detecting means, 29 ... Light quantity change releasing means, 34 ... color changing means, 35 ... color changing circuit, 36 ... diroom lighting, 39 ... color change releasing means.

Claims (7)

Detection of light shielding and subsequent recovery of the light safety device (7) provided at the entrance of the work surface where the operator's hand and / or material enters the work area (6) of the slide (4); In the safety device of the sensitive press starter that automatically starts the press machine (1),
The light-type safety device (7) receives a light-blocking / recovery detection signal, counts the number of light-blocking / recovery breaks based on this detection signal, and outputs this break number data, light-blocking / recovery detection signal. Break number counting means (21) to perform,
Break mode selection means (22) for selecting any one of a plurality of break modes depending on the number of breaks and outputting a mode signal corresponding to the selected break mode;
Based on the break number data inputted from the break number counting means (21), the light shielding / recovery detection signal, and the mode signal inputted from the break mode selection means (22), the current light shielding signal is converted into a press machine ( 1) determining means (23) for determining whether the signal is a shading signal immediately before starting, and for outputting a change command when the pressing machine (1) is immediately before starting the shading signal;
A safety device for a sensitive press activation device, comprising: a light quantity changing means (25) for inputting a change command for the discriminating means (23) and changing the light quantity of the die room illumination lamp (16).   The safety device for a sensitive press starter according to claim 1, wherein the light quantity changing means (25) changes the light quantity by dimming.   The safety device for a sensitive press activation device according to claim 1, wherein the light quantity changing means (25) blinks to change the light quantity.   The safety device for a sensitive press starter according to claim 1, wherein the light quantity changing means (25) changes the light quantity by increasing light.   The safety device for a sensitive press activation device according to claim 1, wherein the slide (4) is in a predetermined pressing step and reaches a predetermined position, or the die room illumination lamp (16). Sensitive type, characterized in that a light quantity change canceling means (29) for returning the light quantity of the die room illumination lamp (16) is provided at any one time when a predetermined time has elapsed after the light quantity of Safety device for press activation device. Detection of light shielding and subsequent recovery of the light safety device (7) provided at the entrance of the work surface where the operator's hand and / or material enters the work area (6) of the slide (4); In the safety device of the sensitive press starter that automatically starts the press machine (1),
The light-type safety device (7) receives a light-blocking / recovery detection signal, counts the number of light-blocking / recovery breaks based on this detection signal, and outputs this break number data, light-blocking / recovery detection signal. Break number counting means (21) to perform,
Break mode selection means (22) for selecting any one of a plurality of break modes depending on the number of breaks and outputting a mode signal corresponding to the selected break mode;
Based on the break number data inputted from the break number counting means (21), the light shielding / recovery detection signal, and the mode signal inputted from the break mode selection means (22), the current light shielding signal is converted into a press machine ( 1) determining means (23) for determining whether the signal is a shading signal immediately before starting, and for outputting a change command when the pressing machine (1) is immediately before starting the light, and a change command for this determining means (23) And a color changing means (34) for changing the illumination color of the die room lamp (36), and a safety device for a sensitive press activation device.   7. The safety device for a sensitive press activation device according to claim 6, wherein the slide (4) is in a predetermined pressing step and reaches a predetermined position, or the die room illumination lamp (36). A color change canceling means (39) for returning the illumination color of the die room illumination lamp (36) to any one of a predetermined time after the illumination color is changed is provided. Safety device for sensitive press starter.

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