JP2006079931A - Switching structure with electromagnetic locking type safety switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching structure with an electromagnetic locking type safety switch, of which only by a closing operation, an actuator can not be inserted into a switch main body after releasing a switching member, even if the switching member is shifted in a closing direction. <P>SOLUTION: On the switching structure with an electromagnetic locking type safety switch structured by mounting the actuator 12 of the electromagnetic locking type safety switch 10 on a door 2 side and mounting the switch main body 11 on a pillar 7, a switching structure of the switch main body is set at an 'on' state by inserting the actuator 12 into an actuator insertion port 11a of the switch main body 11 when the door 2 is in a state of being closed, and the switching structure is set at an 'off' state by drawing out the actuator 12 from the actuator insertion port 11a when the door 2 is in a state of being opened. A shutter member 23 selectively closing the actuator insertion port 11a when the opening/closing member 2 is in a state of being opened, is arranged at the pillar 7 side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an opening / closing structure including an electromagnetic lock type safety switch.

  The electromagnetic lock type safety switch is generally composed of a switch body with a built-in switching mechanism for an external power supply circuit, and an actuator that is detachably inserted into an actuator insertion port of the switch body to drive the switching mechanism. (For example, refer to Patent Document 1).

  In a conventional opening / closing structure equipped with this electromagnetic lock type safety switch, an electromagnetic lock type safety switch is attached to a predetermined opening area, for example, an entrance / exit to an equipment area where an automated machine tool or the like is installed. The switch detects the opening and closing of the door provided at the entrance, and opens and closes the power supply to the facility.

  That is, an actuator is attached to one of a pair of pillars provided on both sides of the entrance and exit, and a switch body is attached to the other pillar. When the door is closed, the door-side actuator is inserted into the actuator insertion port of the column-side switch body, and the switching mechanism is switched on, thereby enabling the facility to operate with the power supply to the facility energized. . On the other hand, when the door is opened, the actuator is extracted from the actuator insertion port of the switch body, and the switching mechanism is switched off. As a result, the power supply to the facility is shut off, the facility cannot be operated, and safety measures are taken to prevent the facility from operating when an operator enters the facility area by setup work or maintenance work.

JP 2004-79204 A

  However, in the conventional opening / closing structure provided with the electromagnetic lock type safety switch described above, the switch body and the actuator are simply positioned so that the actuator can be reliably inserted into and removed from the actuator insertion port of the switch body. Are attached to the pillar on the fixed member side and the door on the open / close member side.

  For this reason, when the door is opened and the operator is working, the door is rotated in the closing direction for some reason and the actuator is inserted into the actuator insertion port of the switch body. The power supply is energized and operation is possible, and the worker is exposed to danger.

  In addition, as an opening / closing structure including an electromagnetic lock type safety switch, for example, an actuator is attached to a cover that can be rotated or slidable to open and close a work area of a machine tool that is a predetermined opening area where an operator or the like can enter and exit, and a fixing member When the switch body is attached to the machine tool body side, and the cover is closed as described above, the actuator is inserted into the actuator insertion port of the switch body, and the machine tool is operated with the power supply to the machine tool energized. It is also possible to configure the machine tool so that it does not operate when the cover is opened by pulling out the actuator and shutting off the power to the machine tool. Just by positioning the switch body on the machine tool body side, So that may occur.

  Therefore, the object of the present invention made in view of such points is excellent in safety that the actuator cannot be inserted into the switch body only by the closing operation even when the opening / closing member is displaced in the closing direction after the opening / closing member is opened. The object is to provide an open / close structure with an electromagnetic lock type safety switch.

  The invention of the open / close structure with an electromagnetic lock type safety switch according to claim 1, which achieves the above object, is removably inserted into a switch body incorporating a switching mechanism for an external power supply circuit and an actuator insertion port of the switch body. The actuator of the electromagnetic lock type safety switch having an actuator that drives the switching mechanism is attached to the opening / closing member side that opens and closes a predetermined opening region, the switch body is attached to the fixed member side, In the closed state, the actuator is inserted into the actuator insertion port to turn on the switching mechanism, and in the open state of the opening / closing member, the electromagnetic lock type that pulls out the actuator from the actuator insertion port and turns off the switching mechanism. In the open / close structure with safety switch, The serial stationary member side, in the opened state of the opening and closing member, characterized in that a shielding means for selectively occluding said actuator slot.

  According to a second aspect of the present invention, in the opening / closing structure with an electromagnetic lock type safety switch according to the first aspect, the shielding means includes a shutter member that can be rotated by its own weight. The actuator insertion port is closed by rotating by its own weight.

  According to a third aspect of the present invention, in the opening / closing structure with an electromagnetic lock type safety switch according to the second aspect, the rotation in the direction opposite to the rotation direction for closing the actuator insertion port of the shutter member on the fixed member side. The shutter member is provided so that the shutter member can always be rotated by its own weight in the rotation direction for closing the actuator insertion port.

  According to a fourth aspect of the present invention, in the opening / closing structure with an electromagnetic lock type safety switch according to the third aspect, the stopper member abuts on a shutter member that rotates in a direction opposite to the rotation direction that closes the actuator insertion port. And a hook member that restricts the rotation of the shutter and hangs a card that enters the opening area.

  According to a fifth aspect of the present invention, in the open / close structure with an electromagnetic lock type safety switch according to any one of the second to fourth aspects, a board for attaching the switch body is provided on the fixing member side, and the shutter is provided on the board. A member is provided.

  According to a sixth aspect of the present invention, in the opening / closing structure with an electromagnetic lock type safety switch according to any one of the first to fifth aspects, the predetermined opening area is an entrance to an equipment area where a machine tool or the like is installed. The opening / closing member is a pivotally provided door that opens and closes the entrance / exit on one of a pair of pillars provided on both sides of the entrance / exit, and the actuator is attached to the rotating front end side of the door, The switch body is attached to the other of the pair of pillars.

  According to the first aspect of the invention, when the opening / closing member is in the open state, the actuator is obstructed by the shielding means even if the opening / closing member is displaced in the closing direction for some reason by closing the actuator insertion port of the switch body by the shielding means. As a result, the insertion into the actuator insertion port is prevented. Therefore, since the OFF state of the switching mechanism of the switch body is reliably maintained, the safety is improved.

  According to the invention of claim 2, in the open state of the opening / closing member, the shutter member is rotated by its own weight and closes the actuator insertion port of the switch body. Further improvement of sex is brought about.

  According to the invention of claim 3, the shutter member is restricted from rotating in the direction opposite to the rotation direction for closing the actuator insertion port by the stopper member, and is always rotated by its own weight in the rotation direction for closing the actuator insertion port. When the opening / closing member is opened, the shutter member is automatically rotated by its own weight to close the actuator insertion port. Therefore, the actuator insertion port is more reliably closed in the open state of the opening / closing member, and the safety can be further improved.

  According to the invention of claim 4, since the hook member for hooking the entering card also serves as the stopper member, the number of parts can be reduced and the cost can be reduced as compared with the case where the hook member and the stopper member are provided separately.

  According to the invention of claim 5, since the shutter member is provided on the substrate to which the switch body is attached, the number of parts can be reduced and the cost can be reduced as compared with the case where the switch body and the shutter member are provided separately. The accuracy of the relative position between the shutter member and the shutter member can be ensured, and the assembly work of the switch body and the shutter member is also simplified.

  According to the invention of claim 6, since the switching mechanism of the switch body is reliably maintained in the state where the operator opens the door of the entrance and enters the equipment area, the equipment setup work, maintenance work, etc. The safety of the workers in is ensured.

  Hereinafter, an embodiment of an opening / closing structure with an electromagnetic lock type safety switch according to the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment of the present invention. FIG. 1 is a front view of an opening / closing structure with an electromagnetic lock type safety switch, FIG. 2 is also a side view, and FIG. 3 is an enlarged view of a portion A in FIG. FIG.

  In this embodiment, an electromagnetic lock type safety switch 10 is attached to an entrance 1 to an equipment area where a machine tool or the like that is a predetermined opening area is installed, and the door 2 that is an opening and closing member provided at the entrance 1 is opened and closed. It detects and opens and closes the power supply to the equipment. 2 and 3, the arrow O indicates the opening direction of the door 2, and the arrow C indicates the closing direction.

  The door 2 includes a door frame 3, a safety cover 4 made of a wire mesh held by the door frame 3, and a handle 5 attached to one side of the door frame 3, and is provided on both sides of the doorway 1. In this embodiment, one of the pair of pillars 6 and 7 is rotatably provided on the pillar 6 via two hinges 8 so as to open and close the doorway 1.

  In addition, as described above, the electromagnetic lock type safety switch 10 is removably inserted into the switch body 11 having a built-in switching mechanism for an external power supply circuit and the actuator insertion port 11a of the switch body 11 so that the switching mechanism is installed. The switch main body 11 is screwed to the board | substrate 13 attached to the other pillar 7 side as a fixing member. The lower part of the switch body 11 is covered with a cover 14.

  On the other hand, the actuator 12 is screwed to the upper part 3 a of the door frame 3 on the rotating tip end side of the door 2. When the door 2 provided with the actuator 12 is closed, the actuator 12 is inserted into the actuator insertion port 11a of the switch body 11 on the column 7 side, and the switching mechanism is switched on. Thus, the facility can be operated with the power supply to the facility energized. When the door 2 is opened, the actuator 12 is pulled out from the actuator insertion port 11a of the switch body 11, and the switching mechanism is switched to the OFF state. As a result, the power supply to the facility is cut off and the facility cannot be operated.

  In the present embodiment, the entrance state to the equipment area is indicated at a position above the mounting position of the switch body 11 on the board 13 to which the switch body 11 of the electromagnetic lock type safety switch 10 is mounted. A hook member 16 for hooking the entering card is provided, and shielding means 20 for selectively closing the actuator insertion port 11a of the switch body 11 in the open state of the door 2 is provided.

  The shielding means 20 includes an arm 21 attached to the substrate 13 by welding or the like, and a flat shutter member 23 provided at the tip end portion 21a thereof so as to be rotatable in the vertical direction via a support shaft 22 extending in the horizontal direction. have. The shutter member 23 is rotated by the support shaft 22 at a position deviated from the center so that the shutter member 23 rotates about the support shaft 22 by its own weight and closes the actuator insertion port 11a of the switch body 11 when the door 2 is open. Supported as possible.

  Further, the hook member 16 is attached to the upper portion of the substrate 13 rather than the shielding means 20 so that its tip end 16 a protrudes from the support shaft 22 to the opening side of the door 2. When the shutter member 23 comes into contact with the tip 16a of the hook member 16 as indicated by a virtual line 23b in FIG. 3, the shutter member 23 rotates in a direction opposite to the rotation direction for closing the actuator insertion port 1a. To regulate. Thereby, the hook member 16 also functions as a stopper member that allows the shutter member 23 to rotate in the rotation direction in which the actuator insertion port 11a is closed by its own weight at all times.

  In the above configuration, when the door 2 is closed and the actuator 12 is in an operable state in which the actuator 12 is inserted into the actuator insertion port 11a of the switch body 11, the shutter member 23 is rotated by its own weight and the actuator 12 Still in contact with the front side.

  In this state, when the operator opens the door 2 for equipment setup work or maintenance work, the shutter member 23 is lifted manually against its own weight and is in contact with the tip 16a of the hook member 16. The shutter member 23 is held in a stationary state in which the shutter member 23 is in contact with the front surface side of the actuator 12 without being pivoted upwardly around the support shaft 22 or manually pivoted upward. 2 is rotated in the opening direction. As a result, the actuator 12 is pulled out from the actuator insertion port 11a of the switch body 11, and the switching mechanism is switched to the OFF state, thereby disabling the operation of the equipment.

  When the door 2 is opened by manually lifting the shutter member 23, the shutter member 23 is rotated by its own weight by releasing the hand from the shutter member 23 after the door 2 is opened. As shown by a solid line in FIG. 3, the actuator insertion port 11a of the switch body 11 is automatically closed.

  Further, when the door 2 is opened in a stationary state in contact with the front side of the actuator 12 without manually rotating the shutter member 23 upward, the shutter member 23 follows the opening operation of the door 2. 2 and 3, the shutter member 23 rotates around the support shaft 22 by its own weight when the actuator 12 passes by rotating while contacting the upper surface of the actuator 12 as indicated by a virtual line 23a. As a result, the actuator insertion port 11a of the switch body 11 is automatically closed as shown by the solid line in FIGS.

  Therefore, even if the door 2 is rotated in the closing direction for some reason after that, the actuator 12 comes into contact with the shutter member 23 to prevent the switch body 11 from being inserted into the actuator insertion port 11a, and the switching mechanism is turned on. It is possible to prevent the equipment from being switched to a state, the equipment will not be ready for operation, and to ensure the safety of workers entering the equipment area for equipment setup and maintenance work. it can.

  When the door 2 is closed after the work in the equipment area is finished, the shutter member 23 is manually lifted against its own weight and hits the tip 16a of the hook member 16 as indicated by a virtual line 23b in FIG. Rotate upward to contact position. Thus, with the shutter member 23 retracted from the actuator insertion port 11a of the switch body 11, the door 2 is closed and the actuator 12 is inserted into the actuator insertion port 11a of the switch body 11, and then the hand is released from the shutter member 23. As a result, the shutter member 23 is rotated about the support shaft 22 by its own weight and is brought into a stationary state in contact with the front side of the actuator 12.

  As described above, according to the present embodiment, the shutter member 23 that closes the actuator insertion port 11a of the switch body 11 is provided in the open state of the door 2 that opens and closes the entrance / exit 1 of the equipment area. Even when the door 2 is rotated in the closing direction for some reason while in the equipment area, the shutter member 23 can reliably prevent the actuator 12 from being inserted into the actuator insertion port 11a of the switch body 11. . Therefore, the OFF state of the switching mechanism of the switch body 11 can be reliably maintained, and the safety of the operator can be ensured reliably.

  In addition, the shutter member 23 can always rotate by its own weight in the rotation direction that closes the actuator insertion port 11a because the rotation in the direction opposite to the rotation direction that closes the actuator insertion port 11a is restricted by the hook member 16. When the shutter member 23 is manually rotated upward against its own weight when the door 2 is opened, the shutter member 23 is released by releasing the hand after the door 2 is opened. Is rotated by its own weight to automatically close the actuator insertion port 11a. When the door 2 is opened in a stationary state without manually rotating the shutter member 23 upward, the shutter is opened. The member 23 rotates by its own weight in accordance with the opening operation of the door 2 and automatically closes the actuator insertion port 11a. Without clogging forgotten 11a occurs, it is possible to further improve safety.

  Further, since the shielding means 20 having the arm 21 and the shutter member 23 and the hook member 16 that also serves as a stopper member for restricting the rotation of the shutter member 23 are provided on the substrate 13 to which the switch body 11 is attached, Compared with the case where they are provided separately, the number of parts can be reduced, the cost can be reduced, the accuracy of the relative position between the switch body 11 and the shutter member 23 can be easily obtained, and the assembly can be simplified.

  The present invention is not limited to the opening / closing structure of the equipment area described above, and may be applied to, for example, an opening / closing structure that opens and closes a work area of a machine tool that can be accessed by an operator or the like by a cover that can be rotated or slid Can do. The shielding means may be configured to close the actuator insertion port of the switch body by manually displacing the shielding member, for example, in the open state of the opening / closing member such as the door or the cover. In addition, various modifications can be made without departing from the spirit of the invention.

It is a front view of the opening-closing structure with an electromagnetic lock type safety switch by an embodiment of the invention. Similarly, it is a side view. Similarly, it is the A section enlarged view of FIG.

Explanation of symbols

1 Doorway (opening area)
2 Door (opening / closing member)
6 pillar 7 pillar (fixing member)
10 Electromagnetic lock type safety switch 11 Switch body 11a Actuator insertion slot 12 Actuator 13 Substrate 16 Hook member (stopper member)
20 shielding means 21 arm 23 shutter member

Claims (6)

The actuator of the electromagnetic lock type safety switch having a switch body with a built-in switching mechanism for an external power supply circuit, and an actuator that is removably inserted into an actuator insertion port of the switch body to drive the switching mechanism. The opening region is attached to the opening / closing member side, the switch body is attached to the fixed member side, and in the closed state of the opening / closing member, the actuator is inserted into the actuator insertion port to turn the switching mechanism on, In an open / close structure with an electromagnetic lock type safety switch that pulls out the actuator from the actuator insertion port in the open state of the open / close member and turns off the switching mechanism.
An opening / closing structure with an electromagnetic lock type safety switch, wherein a shielding means for selectively closing the actuator insertion port in the open state of the opening / closing member is provided on the fixing member side.   The said shielding means has a shutter member that can be rotated by its own weight, and when the opening / closing member is in an open state, it is rotated by its own weight to close the actuator insertion port. Opening / closing structure with electromagnetic lock type safety switch as described in 1.   A stopper member for restricting the rotation of the shutter member in the direction opposite to the rotation direction for closing the actuator insertion port is provided on the fixing member side, and the rotation direction for blocking the shutter member from the actuator insertion port. The opening / closing structure with an electromagnetic lock type safety switch according to claim 2, characterized in that it can always be rotated by its own weight.   The stopper member abuts on a shutter member that rotates in a direction opposite to the rotation direction that closes the actuator insertion slot, restricts the rotation of the shutter, and hangs a entering card that indicates an entrance state to the opening area. The opening / closing structure with an electromagnetic lock type safety switch according to claim 3, wherein the opening / closing structure is a hook member.   5. The opening / closing structure with an electromagnetic lock type safety switch according to claim 2, wherein a board to which the switch body is attached is provided on the fixing member side, and the shutter member is provided on the board. .   The predetermined opening area is an entrance to an equipment area in which a machine tool or the like is installed, and the opening / closing member is rotatably provided at one of a pair of columns provided on both sides of the entrance / exit. 6. The door according to any one of claims 1 to 5, wherein the actuator is attached to a rotating tip end side of the door, and the switch body is attached to the other of the pair of pillars. Opening / closing structure with electromagnetic lock type safety switch.

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