JPH0676675A - Safety switch device - Google Patents

Abstract

PURPOSE:To use a switching actuator in common and make it easy to change the overall configuration of a safety switch device by causing the locking rod of a lock lever rotationally pushed by an elastic body to be engaged in the engagement stepped portion of a cam-shaped plate, and locking the lever while stopping the lever from rotating inversely. CONSTITUTION:A switching actuator 2, mounted on a movable member such as a door, is inserted into a safety switch as the door turns, and a disc-shaped cam-like plate is rotated by means of pressing faces 7a, 7b formed at the ends of the actuator. As the cam-shaped plate is rotated, a cam follower pin 29 which engages in guide cam holes 20, 24 is moved in the direction indicated by arrow C and a switch is turned via the pin 29. The locking rod 29 of a lock lever 27 is brought into sliding contact with the peripheral edge of the cam-shaped plate and is rotationally pushed by coil springs 55, 56 via an operating rod 50, etc. As the cam-shaped plate rotates the locking rod 49 is locked to its engagement stepped portions 15, 16 so that the door is locked. To unlock the door, an operating rod 58 is pressed in the direction indicated by the arrow to rotate an operating rod 48 so as to move the locking rod 49 upwards.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is, for example, turned off when a door of a doorway of a room or a factory in which an industrial machine is installed or a protective door provided in a danger zone of the industrial machine itself is opened and the internal door is opened. By automatically stopping the operation of the machine and preventing the machine from operating unless the doors and protective doors are completely closed, it is possible to ensure that the human body is caught in an industrial machine before the trouble occurs. The present invention relates to a safety switch device for prevention.

[0002]

2. Description of the Related Art Conventionally, for example, in Europe, maintenance work for industrial machines has been used as a means for preventing accidents caused by a third person accidentally turning on power during maintenance work on industrial machines. Prior to the procedure, a worker must remove all fuses from the fuse-type blade switch and put them in their pockets before starting work.In the United States, maintenance workers should not turn on the power after shutting it off. It is locked with a key, and the management method for ensuring the safety of such maintenance work is legally required. However, with such a management method that relies on the awareness of the worker himself, there is a risk that the worker will forget it and lose its effect.

Therefore, when a dangerous industrial machine which is liable to be caught or damaged by a human body is installed, a door or an industrial door of a room or factory where the machine is installed or an industrial machine is installed. By installing a safety switch device that automatically detects the opening and closing of its own protective door and turns it on and off, it is prohibited to enter a hazardous area, and as long as a human body exists in a room or factory, it is installed internally. It is preferable to prohibit the operation of the industrial machine or prevent the machine from operating unless the protective door is closed. As a conventional safety switch device used for such an application, an actuator attached to a door or the like is inserted into the switch body when the door is closed to rotate a plurality of cam-shaped plates in the forward direction, The rotation of the cam plate moves the switch changeover body to switch the switch unit. Conversely, when the door is opened, the actuator that moves in the pull-out direction relative to the switch body rotates the cam plate in the opposite direction to switch the switch unit. There is a configuration that switches to the original state.

[0004]

By the way, as such a safety switch device, there is one provided with a lock mechanism,
In this device, a plate-shaped switching actuator has a cam-shaped plate operating portion of a passive operation part of the switch main body and a locking engagement hole arranged side by side, the door is closed, and the switching actuator is inserted into the switch main body. At the same time, the actuating part rotates the cam plate to switch the switch part, and at the same time, the locking claw that is constantly urged into the locking lock hole engages to move the switching actuator in the removal direction. Block or mechanically lock the door from opening. Then, for example, by inputting a detection signal indicating that the machine has stopped, the solenoid of the lock mechanism is operated to release the locking pawl from the locking hole, thereby releasing the mechanical lock and opening and closing the door. It is configured to do.

However, since the lock mechanism is configured to engage and disengage the locking claw in the locking locking hole of the switching actuator as described above, it is possible to distinguish between the type having the locking mechanism and the type not having the locking mechanism. Since the switching actuators are dedicated to each, there is a drawback that the cost becomes high. Also,
In the type equipped with a locking mechanism, the location of the locking pawl is determined by the location of the locking pawl hole in the switching actuator, and the overall shape cannot be changed. It may not fit in the installation space where it should be.

Therefore, according to the present invention, a switching actuator having the same shape can be shared regardless of the presence or absence of a lock mechanism, and a unit such as a solenoid in the lock mechanism can be provided on either the left or right side of the switch body according to the installation space. It is a technical object to provide a safety switch device having a configuration that can be selectively attached to a location.

[0007]

As a technical means for achieving the above object, the present invention has a safety switch device configured as follows. That is, in a safety switch device that is turned on and off by opening and closing a door, etc., a switching actuator attached to a movable member such as a door and a built-in passive operation section are operated by inserting and removing this actuator from an insertion hole. A switch body for switching the switch section, and a lock mechanism for locking the passive operation section in a switching state by inserting the actuator and releasing the locked state by operating a solenoid. An engaging step is cut out at a plate-shaped peripheral end, and a cam-shaped plate which is rotated in both directions by inserting and removing the actuator, and a cam hole and a pin guide plate of the cam-shaped plate by the rotation of the cam-shaped plate And the cam follower pins that slide in contact with the guides of the A switch bar for switching the switch part, wherein the lock mechanism has a base bar which is orthogonal to the cam plate and is located above the cam bar, and a U-shape which engages with the engaging step part. And a lock lever integrally formed with a locking rod extending from the base bar, and a pair of operating pieces vertically extending from both ends of the base bar and located at left and right ends of the switch body. , The elastic body holds the lock lever in a movable state by rotationally urging the lock bar in a direction in which the locking rod is always in contact with the peripheral end face of the cam plate, and holds the lock lever in a movable state. The actuating rod is engaged to actuate the lock lever against the biasing force of the elastic body, and the biasing force of the elastic body is reached when the cam-shaped plate is rotated until the switch portion is switched by the insertion of the actuator. By The locking rod engages with the engagement step portion to prevent rotation of the cam-shaped plate due to movement of the actuator in the withdrawal direction, and the operation of the solenoid causes the engagement rod to move toward the engagement step. It is characterized in that the lock lever is rotated in a direction away from the portion.

[0008]

For example, if the switching actuator is provided in the protruding state on the door and the switch body is arranged at a position where the switching actuator is inserted from the insertion hole when the door is closed, the switching actuator is inserted when the door is closed. The cam follower pin that slides while following each cam hole by the rotation of the cam plate as the actuator is inserted is inserted into the switch main body from the guide part of the pin guide plate. The switch switching body integrally provided with the cam follower pin is also moved to switch the switch section.

When the cam-shaped plate is rotated by inserting the above-mentioned switching actuator, the locking rod of the lock lever, which is urged to rotate by the elastic body, is always brought into contact with the substantially disc-shaped cam-shaped plate to slide. At the time of contact and rotation of the cam plate to the state of switching the switch portion, the lock lever rotates so that the locking rod faces the engagement step portion and engages with the engagement step portion. Therefore, the rotation of the cam plate due to the movement of the switching actuator in the pulling-out direction is prevented by the locking step contacting the locking rod, and the movement of the switching actuator in the pulling-out direction, that is, the opening of the door is prevented. Lock mechanically to prohibit. And
For example, when the machine is stopped and the solenoid of the lock mechanism is operated by the input of the detection signal, the lock lever is operated against the biasing force of the elastic body by the operating rod of this solenoid, and the locking rod engages the engaging step portion. And the lock is released.

The locking mechanism of this safety switch device is
Since the lock lever, which is always urged to rotate by the elastic body, is engaged with the locking step of the cam-shaped plate, the switching actuator only forms the operating part of the cam-shaped plate, and therefore locks. It can be used for both types with and without a mechanism, and a considerable cost reduction can be achieved. In addition, the lock mechanism is independent of the shape of the switching actuator, and the lock lever actuating rods that receive the actuating force of the solenoid actuating rod are provided at both ends of the base bar and are located at the left and right ends of the switch body. Therefore, a unit such as a solenoid in the lock mechanism can be selectively attached to either the left or right of the switch body, and the entire shape can be easily changed according to the installation space.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the drawings. 1 to 6 all show an embodiment of the present invention, in which the cover body (10) of the switch part (3) and the cover body (6) of the passive operation part (4) described later are excluded. FIG. 2 is a right side view cut at the central portion in the left-right direction, and FIG. 3 is a right side view cut at the right place. In these figures, the device is composed of a switch body (1) in the form of an outer box, a switching actuator (2) formed in a key-like shape by a flat plate as a whole, and a partial component of a lock mechanism. The switch body (1) is made up of three members, a solenoid unit (3) and a switch unit (4) and a switching actuator (2) to switch the switch unit (4). And (5). Then, the switching actuator (2) has its mounting substrate portion (not shown) fixed to a movable member, for example, a door in a protruding state in the door opening / closing direction by a screw. On the other hand, in the switch body (1), when the door is closed, the switching actuator (2) is inserted from any of the insertion holes (6a) and (6b) of the lid body (6) of the passive operation part (5). Is fixed in place. In this embodiment, the switching actuator (2) can be inserted by selectively selecting one of two directions orthogonal to each other, and the switching actuator (2) can be inserted in two orthogonal directions of the lid body (6) of the passive operation part (5). Insertion holes (6a), (6
b) is drilled.

The switching actuator (2) is provided with three kinds of operation pressing surfaces (7a), (7) of two kinds which are formed with a predetermined step on the front end surface of the base plate portion to be screwed to a door or the like.
b) and cam-like plates (13), (14a), (14) described later.
The escape hole (8) for b) and the return pressing surface (9) consisting of the hole edge surface on the front side of this escape hole (8) are integrally formed.

Next, the switch body (1) will be explained. As shown in FIG. 2, the passive operation section (5) has a pair of support stands (11), (11) which are erected upright on both sides so as to face each other.
A support shaft (12) is bridged between the drive shaft (12), a drive cam plate (13), and a pair of restricting cam plate (14a) on both sides of the drive cam plate (13). (14
and b) are rotatably mounted independently of each other and in an overlapping state.

As shown in FIG. 2, the driving cam-shaped plate (13) has two rectangular cuts of the same shape formed corresponding to the two insertion holes (6a), (6b). One of the opposite sides of the notch is an operating pressure receiving portion (17) and the other side is a returning pressure receiving portion (18). A central portion in the thickness direction of the disk is formed into a hollowed shape over an angle range of about 90 ° at a portion opposite to the formed portions of the notches, and an operating relief portion of a switch switching body (27) described later. (19) is formed, and guide cam holes (20) of the same shape are formed on both sides of the operation relief portion (19).
In addition, the driving cam plate (13) and the restricting cam plate (14)
FIG. 5A to FIG. 5A showing the mutual relationship with a) and (14b).
As shown in (c), a locking hole (21) into which a cam follower pin (29), which will be described later, is inserted, is provided at a starting end portion (upper end portion in the drawing) of the guide cam hole (20) of the cam follower pin (29). Communication is formed in a protruding state in the moving direction (right side in the figure),
Further, a peripheral step near the cam hole (20) is cut out to form a locking step (15). On the other hand, both regulating cam plates (14a) and (14b) are also driven cam plate (13).
In the same manner as the above, one of the opposite sides of the two rectangular cutouts of the same shape formed corresponding to the two insertion holes (6a) and (6b) is the operating pressure receiving portion (22). Moreover, the other side portion is a return pressure receiving portion (23), and the guide cam hole (24) is provided at a portion opposite to the forming portions of the notches.
And the guide cam hole (2
A locking hole (25) into which a cam follower pin (29) described later is inserted is formed at the starting end of 4) so as to project in the moving direction of the cam follower pin (29) (rightward in the drawing). A peripheral step near the cam hole (24) is cut out to form a locking step (16).

Further, each cam-shaped plate (13), (14a),
A pin guide plate (26) bent and formed in a substantially U-shape on the front is fixedly provided at the rear part of (14b). This pin guide plate (26) is provided with a guide portion (26
b) a pair of identically shaped support plates (26a), (2)
6a) are erected on both sides. Then, the shaft-shaped switch changeover body (27) integrally provided with the spring receiving disk portion (27a) in the central portion is such that the rear end portion thereof is slidable in the switch case (28) of the switch portion (4). The cam follower pin (29) is fixed to the front end of the cam follower pin (29) in a state of being orthogonal to the front end. Then, the front end portion of the switch changeover body (27) to which the cam follower pin (29) is fixed is loosely inserted into the operation relief portion (19) of the drive cam plate (13), and both end portions of the cam follower pin (29) are The guide cam hole (2) of each of the drive cam plate (13) and the restricting cam plate (14a), (14b).
0) and (24) respectively, and both tips of the cam follower pin (29) are attached to both support plates (26a) and (26a).
Are slidably supported by the respective guide portions (26b) and (26b). Therefore, the switch changer (27)
The front and rear portions of the support plate (2) of the pin guide body (26).
6a), (26a) and the switch case (28) support two points in the front-back direction (left-right direction in FIGS. 2 and 3).
It is stably held so that it can be moved freely. A hook-shaped connecting engagement portion (27b) is formed at the rear end of the switch switching body (27). Further, the spring receiving disk portion (27a) of the switch switching body (27) and the switch case (2
8) is covered with a rubber bellows (30) so as to be waterproof, and outside the rubber bellows (30), the spring receiving disk portion (27a) and the rubber bellows (30) are exposed. A return spring (32) is interposed between the fitted spring tray (31) and the switch selector body (2).
7) is urged forward, and the cam follower pin (29) moves the guide cam holes (20), as shown in FIGS. 2 and 3.
It is engaged with each of the starting ends of (24). In this initial state, each cam-shaped plate (13), (14a), (14b)
Are pressing surfaces (7a) of the switching actuator (2),
The guide cam holes (20), (24) are overlapped with each other in a state of being able to guide the cam follower pins (29) while being stationary at the rotational phase difference corresponding to the step of (7b). .

Further, the switch part (4) includes a unit type contact block (3) in a switch case (28).
3) is provided, and FIG. 4 is a plan view showing a contact block (33) with a part thereof removed and a part thereof cut away. The contact block (33) includes a pair of terminal plates (36) each having a fixed contact (35) for normally closing on both sides of the front and rear ends of the block case (34).
(36) and a pair of terminal plates (38), (38) each having a fixed contact for normal opening (37) are fitted respectively, and are movable in the front-rear direction in the central portion of the block case (34). The engaged and held switch changeover member (39) is provided with a holding hole (40) at the center thereof in a direction orthogonal to the moving direction,
A normally-closed side terminal plate (32) having a pair of normally-closed side movable contacts (41), (41) at both ends in the holding hole (40);
A normally open side terminal plate (44) having a pair of normally open side movable contacts (43) and (43) at both ends is inserted in a state of facing each other, and between both terminal plates (42) and (44). A contact pressure spring (45) is provided on the shaft to urge them in the separating direction. Further, a hook-shaped engaging portion (46) formed on the front end portion of the switch switching member (39) is engaged with the engaging portion (27b) of the switch switching member (27) to switch the switching member (27).
The switch switching member (39) is movably held by a block cover plate (37) fitted to the block case (34) from above. The terminal plates (36), (3
8) is inserted and connected via a terminal screw to a power supply circuit of an industrial machine or the like whose operation is to be controlled.

Next, the lock mechanism which is the gist of the present invention will be described. The lock lever (47) as the main member of this lock mechanism is provided with the cam-shaped plates (13), (14a),
Above (14b), it is movably arranged orthogonally to these. The lock lever (47) is attached to each of the cam-shaped plates (13), (14) on the base bar (48) which is orthogonal to the cam-shaped plates (13), (14a), (14b) and is located above the cam-shaped plates (13), (14a), (14b). 14a) and (14b) are provided with extending U-shaped locking rods (49) that engage with the engagement step portions (15) and (16), respectively, and the base bar (48).
A pair of actuating pieces (50), (50) are respectively hung from both ends of the switch and positioned at the left and right ends of the switch body (1). Further, as shown in FIGS. 2 and 3, the spring receiving projections (5) are respectively formed from the side surfaces of the base bar (48) opposite to the surface where the locking rods (49) are formed.
1) and (51) are provided in a protruding manner, and spring receiving projections (52) are provided in a protruding manner on the side surface of the lower end portion of each actuating piece (50) on the side where the locking rod (49) is formed. There is. The spring receiving projections (51) and (5) are respectively provided on the extending portions of the pair of support bases (11) and (11).
The spring receiving recesses (53) and (54) are formed so as to be opposed to 2), and the spring receiving recesses (53) are formed.
Compression coil springs (55) and (56) are respectively provided between the spring receiving projection (51) and the spring receiving projection (51) and between the spring receiving recess (54) and the spring receiving projection (52).
The lock lever (47) is constantly urged in the clockwise direction in FIGS. 2 and 3 by the compression coil springs (55) and (56), and the locking rod (49) is moved to the cam plates (13) and (13). It is held movably while being in contact with (14a) and (14b). In addition, a pair of supports (
A rectangular insertion hole (57) is bored in a portion of the extended portion of (1) and (11) facing the lower spring receiving recess (54), and an actuating rod (projected from the solenoid unit (3) ( 58) is loosely inserted in the insertion hole (57) and abuts on the side surface of the actuating piece (50) opposite to the spring receiving projection (52). Incidentally, in this embodiment, as shown in FIG.
Although the solenoid unit (3) is attached to the right side of the switch body (1) as described above, the operating pieces (50) located at the left and right ends of the switch body (1) on both sides of the lock lever (47), (50) and the actuating pieces (50), (50) are provided with insertion holes (57) on both sides of the switch body (1) so as to oppose each other, so that the solenoid can be installed depending on the installation space. The unit (3) can also be attached to the left side of the switch body (1).

Next, the operation of the above embodiment will be described. Now, the switching actuator (2) is attached to the end surface of the door in a protruding state, and the switching actuator (2) is inserted from the insertion hole (6a) or (6b) when the switch body (1) is closed. If the doors are opened and the switching actuator (2) is pulled out from the switch body (1) when they are arranged so as to be inserted so as to be opposed to each other, as shown in FIGS. 2 and 3 and FIG. 5 (a), respectively. As shown, the urging force of the return spring (32) causes the switch changeover body (27) and the switch changeover member (39) to move forward so that the cam follower pin (29) causes the guide cam holes (20), (). 24) located at the beginning of each. In this initial state, as shown in FIG. 5A, the driving cam plate (13) and the restricting cam plates (14a), (1)
4b) means that the displacement of the respective pressure receiving portions (17) and (22) for operation is due to the respective pressing surfaces (7) of the switching actuator (2).
a) and (7b) are stationary with a rotational phase difference substantially matching the steps, and each of the guide cam holes (20), (2)
4) are superposed in conformity with each other so that the cam follower pin (29) can be guided. Further, at this time, in the switch portion (4), the switch switching member (39) moves to the front side and the normally closed side movable contact (41), as shown in FIG.
The contact point (41) is pressed against the normally-closed fixed contacts (35) and (35) by the contact pressure spring (45) to be surely electrically connected.

Then, the door is moved in the closing direction so that the switching actuator (2) is inserted into the passive operating portion (4) of the switch body (1) through the insertion hole (6a), and the switching actuator (2). Is each cam plate (13),
4a) and (14b) are shown in FIG.
As shown in (a), each cam plate (13), (14
a), (14b) each pressure receiving portion (17), (2) for operation
Since the deviation of 2) and the steps of the pressing surfaces (7a), (7b) of the switching actuator (2) substantially match, the pressing surfaces (7a), 7a of the switching actuator (2),
(7b) is a pressure receiving portion (1) for operation of the driving cam plate (13).
7) and the respective actuating pressure receiving portions (22) and (22) of the regulating cam-shaped plates (14a) and (14b), respectively, at the same time. In FIG. 5, the arrow C indicates that the cam follower pin (29) is the guide portion (26) of the pin guide plate (26).
It shows the direction of movement guided by b).

Then, when the switching actuator (2) is further inserted, the cam-shaped plates (13), (13) are pushed by the pressing surfaces (7a), (7b) of the switching actuator (2).
(14a), (14b) are rotated while maintaining the above-mentioned initial state, and the cam follower pin (29) causes the cam holes (20) for guiding the cam-shaped plates (13), (14a), (14b), It is pushed rearward according to (24) and is guided in the guide portion (26b) to move in the direction of arrow C. At this time, each compression coil spring (55), (5
6) The cam-like plates (13), (14)
a), the locking rod (49) of the lock lever (47), which is in contact with the peripheral end surfaces of the (14b), has the cam-shaped plates (13),
It is in sliding contact with the circular peripheral end faces of (14a) and (14b).

When the cam follower pin (29) is moved to the position shown in FIG. 5 (b), the normally open side movable contact (43)
Comes into contact with the fixed contact (37) for normal opening, and the switch part (4)
When the switching operation of the switch portion (3) is completed, the locking rod (49) faces the engagement step portions (15) and (16) at the time when the switching operation of the switch portion (3) is completed. 1
The lock lever (47) rotates clockwise so as to engage with 5) and (16). Further, here, the cam-shaped plates (13), (14) are provided in the clearance holes (8) of the switching actuator (2).
a) and (14b) are inserted so that the return pressure receiving portions (18) and (23) face the return pressing surface (9) of the switching actuator (2).
When the switching actuator (2) is moved in the pulling-out direction, the return pressing surface (9) causes the return pressure receiving portions (18), (2).
3) is pressed to press each cam-shaped plate (13), (14a), (1
4b) is forced to rotate clockwise in FIG. However, the cam-shaped plates (13), (14a), due to the movement of the switching actuator (2) in the pulling-out direction,
The clockwise rotation of (14b) requires the engagement step (15),
(16) is blocked by abutting against the locking rod, and is mechanically locked so as to prohibit the movement of the switching actuator (2) in the pulling-out direction, that is, the opening operation of the door.

Then, for example, when the machine is stopped and the detection signal is input, the solenoid of the solenoid unit (3) is suction driven, and the operating rod (58) is operated in the direction of the arrow in FIG. 50) is pushed. here,
The spring pressure of the upper compression coil spring (55) is set stronger than that of the lower compression coil spring (56), and therefore the lock lever (47) resists the biasing force of the lower compression coil spring (56). Then, the contact portion of the upper compression coil spring (55) is rotated around the contact point as a fulcrum, the locking rod (49) is separated above the engagement step portions (15) and (16), and the lock is released. . In this way, the lock mechanism is configured such that the lock lever (47) is attached to each cam plate (13),
(14a), (14b) each engagement step (15), (1
Since it is configured to be engaged with and disengaged from 6), the switching actuator (2) is independent of the lock mechanism and can be shared by both the type with and without the lock mechanism.

This safety switch device has steps corresponding to the rotational phase difference of the cam-shaped plates (13), (14a), (14b) in the initial state, and the cam-shaped plates (13),
Unless the switching actuator (2) provided with the operation pressing surfaces (7a) and (7b) disposed opposite to (14a) and (14b), the cam-shaped plates (13) and (1) are used.
It is impossible to rotate 4a) and (14b) at the same time while accurately maintaining the initial state.
For example, as shown in FIG. 6A, when a member (59) such as a driver is inserted through the insertion hole (6a) and only one regulating cam plate (14b) is rotated, the regulating cam shape is changed. The cam forward pin (29) is pushed only by the guide cam hole (24) of the plate (14b) and the guide portion (26).
The movement direction is restricted by b) and the movement is made in the direction of arrow C, and the moved cam follower pin (29) is engaged with the locking hole (21) of the driving cam plate (13) in a stationary state, At this point, the movement of the cam follower pin (29) in the direction of the arrow C is blocked, so that all the cam-shaped plates (1
3), (14a) and (14b) are prevented from rotating.

Further, as shown in FIG. 6B, when only the driving cam-shaped plate (13) is rotated by a member (59) such as a driver, the guiding cam of the driving cam-shaped plate (13). The cam follower pin (29) is pushed only by the hole (20) and the moving direction is restricted by the guide part (26b) to move in the direction of the arrow C. The moved cam follower pin (29) is stationary for both restrictions. Cam plate (14
a) and (14b) are engaged with the locking holes (25), and at this time, the movement of the cam follower pin (29) in the direction of arrow C is blocked, so that all the cam-shaped plates (13), ( 14
The rotation of (a) and (14b) is blocked.

[0025]

As described above, according to the safety switch device of the present invention, the locking rod of the lock lever, which is urged to rotate by the elastic body, is always brought into contact with the substantially disc-shaped cam-shaped plate to slide. The lock lever rotates so that the locking rod opposes the engagement step of the cam plate and engages with this engagement step when the cam-shaped plate contacts the engagement step and switches to the state of switching the switch. Then, the engagement step contacts the locking rod to prevent rotation of the cam plate due to the movement of the switching actuator in the pull-out direction, and the solenoid operating rod resists the lock lever against the urging force of the elastic body. Since the locking rod is separated from the engaging step portion by being operated and the lock is released, the switching actuator only forms the operating portion of the cam-shaped plate portion and has a lock mechanism. It can be used for both types not equipped with Kill.

Further, the lock mechanism has no relation to the structure of the switching actuator, and the lock lever actuating rods for receiving the actuating force of the actuating rod of the solenoid are provided at both ends of the base bar respectively to the left and right ends of the switch body. Since it is located at, the unit such as the solenoid in the lock mechanism can be selectively attached to either the left or right side of the switch body, and the overall shape can be easily changed according to the installation space of the device. can do.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention with a lid removed.

FIG. 2 is a right side view of the same taken along the line in FIG. 2 at the center in the left-right direction.

3 is a cutaway right side view of the right place in FIG.

FIG. 4 is a partially cutaway plan view of a contact block of the switch section.

5 (a) to 5 (c) are right side views of a main part showing the operation process of the above in order.

6 (a) and 6 (b) are explanatory views of the operation when an external operation is performed by a member other than the switching actuator.

[Explanation of symbols]

 1 Switch Main Body 2 Switching Actuator 3 Solenoid Unit 4 Switch Section 5 Passive Operation Section 6a, 6b Insertion Hole 13 Drive Cam Plate 14a, 14b Restricting Cam Plate 15, 16 Engagement Step 20 Of Drive Cam Plate Guide cam hole 24 Guide cam hole for regulating cam-like plate 26 Pin guide plate 26a Guide portion 27 Switch changer body 29 Cam follower pin 47 Lock lever 48 Base bar 49 Locking rod 50 Operating rod 55, 56 Coil spring (elastic body) ) 58 Actuating rod

Claims (1)

[Claims] 1. In a safety switch device that is turned on and off by opening and closing a door, etc., a switching actuator attached to a movable member such as a door and a built-in passive operation unit by inserting and removing the actuator from an insertion hole. Is operated to switch the switch unit,
A lock mechanism for locking the passive operating portion in a switching state by inserting the actuator and releasing the locked state by operating a solenoid, wherein the passive operating portion is engaged with a substantially disc-shaped peripheral end portion. A cam-shaped plate which is notched and which is rotated in both directions by inserting and removing the actuator, and a predetermined direction by sliding contact with the cam hole of the cam-shaped plate and the guide portion of the pin guide plate by the rotation of the cam-shaped plate. A cam follower pin to be moved to the cam follower pin, and a switch changeover body that moves integrally with the cam follower pin to change over the switch portion, and the lock mechanism is located at a position perpendicular to the cam plate and above the base bar. A U-shaped engaging rod that engages with the engaging step portion and extends from the base bar; and a hanging rod that extends vertically from both ends of the base bar. The switch body is provided with a lock lever integrally formed with a pair of operating pieces located at the left and right ends, and the lock lever is provided in a direction in which the locking rod is always brought into contact with the peripheral end surface of the cam plate by an elastic body. Inserting the actuator by rotationally urging and holding it in a movable state, and engaging one of the operating pieces with the operating rod of the solenoid to operate the lock lever against the urging force of the elastic body. When the cam-shaped plate is rotated until the switch portion is switched, the locking rod is engaged with the engagement step portion by the urging force of the elastic body and the actuator is moved in the pulling-out direction. Prevents rotation of the cam plate,
A safety switch device characterized in that the lock lever is rotated in a direction in which the locking rod is separated from the engagement step portion by the operation of the solenoid.