JPH06187877A - Safety switch device - Google Patents

Abstract

PURPOSE:To provide a safety switch device whose overall configuration can very easily be varied according to installation space. CONSTITUTION:A main body portion except a switching actuator 5 is divided into three parts: a safety switch main body unit, a solenoid unit 2 and a key unit 3. Mounting portions are formed at plural positions on the outer surface portion of the safety switch main body unit 1. The solenoid unit 2 and the key unit have respective mounting members provided integrally therewith for fitting into the mounting portions. A desired mounting portion of the safety switch main body unit 1 is selected and the mounting member of the solenoid unit 2 is fitted therein so that both units are integrated together. The mounting member of the key unit 3 is fitted into the other mounting portion of the safety switch main body unit so that the key unit 3 is added to the main body unit 1. The overall configuration of the safety switch device can thus be varied to fit into installation space by combining the three kinds of units 1, 2, 3 as necessary.

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 prevent human body from being caught in the industrial machine. The present invention relates to a safety switch device for preventing the above.

[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, the worker unplugs all fuses from the fuse-type blade switch and puts them in his pocket before starting work. In the United States, maintenance workers cannot turn on the power after turning it off. As described above, the keys are locked, and the management method for ensuring the safety of such maintenance work is legally obligatory. 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 that is liable to be damaged by being caught in a human body or the like 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, a switching actuator attached to a door or the like is inserted into the switch body to switch the switch portion when the door is closed, and a lock mechanism in the switch body is provided. A state in which the machine can be operated by automatically locking it against the switching actuator so that it does not move in the pull-out direction and mechanically locking it in the switching state described above, and then operating the switch switching key. Then, for example, the solenoid is driven by the input of the detection signal that the machine has stopped to operate so as to unlock the lock mechanism, so that the door etc. can be opened by hand, and the switch body is opened when the door is opened. In contrast, there is a configuration in which the switch can be switched back to its original state by a switching actuator that moves in the pull-out direction. To.

[0004]

By the way, in such a safety switch device, the switching actuator is attached to a movable member such as a door or a door, and the switching actuator is a switch when the door or the door is closed. It is arranged for the switching actuator to be inserted in a state where the switch is switched, but depending on the installation space where the switch body should be mounted, it is extremely difficult to position the switch body accurately with respect to the switching actuator. There is a case. This is because the shape of the switch main body equipped with the lock mechanism and the lock mechanism using the key for switching the switch is relatively large, and it is costly to manufacture multiple types with different outer body shapes. If it does not fit into the space where it should be installed, a small type that does not have either one or both of the locking mechanism and the locking mechanism is used. However, despite the fact that the function required for the installation location is missing, the installation often results.
In addition, the large number of types leads to high costs.

Therefore, it is a technical object of the present invention to provide a safety switch device whose overall shape can be arbitrarily and extremely easily changed according to the installation space.

[0006]

As a technical means for achieving the above object, the present invention has a safety switch device configured as follows. That is, a safety switch body unit whose switch portion is switched by inserting / removing a switching actuator attached to a movable member such as a door, and the safety switch for mechanically locking the switch portion in a switching state by inserting the actuator. The main body unit includes a solenoid unit having a solenoid for releasing the locked state of the lock mechanism, and a key unit that constitutes a key switch unit that is manually switched, and mounting portions are provided at a plurality of locations on the outer surface of the safety switch main unit. The solenoid unit and the key unit are each integrally provided with a mounting member that fits into the mounting portion, and the solenoid unit and the key unit are respectively attached to the required mounting portion. To selectively insert and fix Is configured as characterized in that mounted integrally with the safety switch main unit Ri.

[0007]

[Function] The safety switch body unit, the solenoid unit, and the key unit are divided into three parts, and mounting portions are formed at a plurality of locations on the outer surface of the safety switch body unit, and the solenoid unit and the key unit are fitted to the mounting portions. Since the mounting members are integrally formed with each other, a required one of the mounting portions of the safety switch body unit is selected and the mounting member of the solenoid unit is fitted, and the fixing member is fixed by, for example, screwing a screw. The solenoid unit is fixed to the safety switch body unit, and the mounting member of the key unit is fitted into the other mounting portion of the safety switch body unit and mounted in the same manner. Therefore, by arbitrarily combining and fixing the three types of units, it is possible to change the overall shape to fit the installation space without using any special member. Further, since the shape corresponding to each existing type can be configured by combining the three types of units, the number of types can be reduced, a large cost reduction can be achieved, and the inventory management can be facilitated.

[0008]

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 (a) to 1 (c) are a plan view, a bottom view and a left side view of a main body portion of an embodiment of the present invention, showing a safety switch main body unit (1), a solenoid unit (2) and a key unit ( It is divided into three blocks of 3). First, regarding the safety switch main unit (1), FIGS. 2A to 2C showing a plan view, a bottom view and a left side view thereof and an external perspective view including a switching actuator (5) are shown in FIG. The outline will be described below. This safety switch body unit (1)
Has a box-shaped outer shape as a whole, a switch part (4) is arranged in the latter half (right side of FIG. 3), and a switch actuator (5) is actuated in the front half to operate the switch part. A passive operation section (6) for switching (4) is provided.

Further, the switching actuator (5) mounted on a movable body such as a door separately from the main body portion fixedly installed at a predetermined location has a predetermined step on the tip surface thereof, and operates two kinds of three actuators. Pressing surfaces (5a), (5b), an escape hole (5c) for a cam-like plate described later, and a return pressing surface (5d) consisting of a hole edge surface on the front side of the escape hole (5c) are integrated. It is formed and has a plate key shape as a whole.

The safety switch body unit (1)
Insertion holes (7a), (7b) into which the switching actuator (5) is inserted when the door or the like is closed are bored in this. In this embodiment, the switching actuator (5) is shown in such a form that the switching actuator (5) can be inserted by selecting one of two orthogonal directions.
Slotted insertion holes (7a) and (7
b) is drilled. In addition, the left and right side plate portions of the cover of the switch part (4) are normally covered with blind plates, and are punched as needed for wiring to the solenoid unit (2) or the key unit (3). Wiring holes (8) to be used are provided respectively, and actuation rods of the solenoid unit (2) described later are selectively inserted into the left and right side plate portions of the lid of the passive operation unit (6). Through holes (9) are formed respectively. Further, as one of the constituent elements of the present invention, mounting recesses (10) of the same shape are formed at the opposite positions of the left and right side end portions of the bottom surface of the switch portion (4), and the recess ( 10)
A mounting hole (11), which is a non-penetrating screw hole, is formed from the outside.

On the other hand, the solenoid unit (2) has a plan view and a front view of the solenoid unit (2) shown in FIG.
As shown in (b), mounting pieces (12) each having a shape to be fitted into the concave portion (10) are provided at positions corresponding to the concave portion (10) of the safety switch body unit (1) at the left and right side end portions of the bottom surface portion. Each of the mounting pieces (12) is provided with a protrusion, and each attachment piece (12) is provided with an attachment hole (13) that matches the attachment hole (11) of the recess (10). Further, in the key unit (3), as shown in FIGS. 5 (a) and 5 (b) respectively showing a plan view and a bottom view of the key unit (3), the concave portion is provided at a portion opposite to a mounting portion of the plate key (14). A mounting piece (15) having a shape to be fitted into the (10) is provided in a protruding manner, and an attaching hole (16) matching the mounting hole (11) of the recess (10) is formed in the mounting piece (15). It is set up.

Therefore, as shown in FIG. 1, the solenoid unit (2) is provided on the right side of the safety switch main unit (1).
The solenoid unit (2)
The mounting piece (12) is fitted into the mounting recess (10) on the right side of the safety switch body unit (1), and the mounting hole (11) and the mounting hole (13) are aligned with each other. ) And a mounting hole (13) from the outside of the safety switch body unit (1) by inserting a screw (not shown) into the solenoid unit (2) integrated with the safety switch body unit (1). Where the mounting holes (11)
Since it is a non-penetrating screw hole formed from the outside, the waterproof property is maintained. Similarly, when the key unit (3) is joined to the left side of the safety switch body unit (1) in a predetermined shape, the mounting piece (15) of the key unit (3) is for mounting on the left side of the safety switch body unit (1). While fitting into the recess (10), the mounting hole (11) and the mounting hole (16) are aligned with each other, and the mounting hole (11) and mounting hole (1)
The key unit (3) is integrated with the safety switch body unit (1) by inserting a screw into the safety switch body unit (1) to the safety switch body unit (1) and the solenoid unit (2). And the body part consisting of the key unit (3) is assembled. At this time, an unused mounting piece (12) for assembly in the solenoid unit (2) is used for mounting the assembled main body portion to a predetermined place such as a machine or a door periphery.

As described above, the main body portion has the three-part structure of the safety switch main body unit (1), the solenoid unit (2) and the key unit (3), and the symmetrical position of the safety switch main body unit (1). Since each is provided with a mounting recess (10) and a mounting piece (12) fitted into the recess (10) at a symmetrical position corresponding to the mounting recess (10) of the solenoid unit (3), the main body Depending on the installation space where the part should be installed,
As shown by the solid line in FIG. 6, a solenoid unit (2) is attached to the left side of the safety switch body unit (1) and a key unit (3) is attached to the right side, or
Further, depending on the application, as shown in FIG. 7, the solenoid unit (2) is provided only on the right side of the safety switch main unit (1).
It is also possible to adopt a configuration in which is attached. Further, as shown by the alternate long and short dash line in FIG. 6, if a recess is formed at the rear end position on the bottom surface of the safety switch body unit (1), the key unit (3) is used for switching in the safety switch body unit (1). It can also be attached to the rear end side that does not interfere with the operation of the actuator (5). In this way, the outer shape can be arbitrarily and easily deformed as necessary.

When combined with the configurations of FIGS. 1 and 6, wiring is performed as shown in FIG. That is, a second switch composed of a first switch (S1) composed of the switch part (4) in the safety switch body unit (1) and a micro switch which is switched by the operation of the solenoid (17) of the solenoid unit (2). Switch (S2) and a third switch (S3) consisting of a key switch that is switched by operating the plate key (14) of the key unit (3), both of which are normally indicated by black circles. It is a closed contact. Therefore, the first switch (S1) shows a state in which the passive operation section (6) of the safety switch body unit (1) is activated by the insertion of the switching actuator (5) and the switch section (4) is switched. There is. The second switch (S1) shows the normal state in which the solenoid (17) is not excited.
The third switch (S3) is shown in a state where the plate key (14) is inserted and rotated. Then, between the ports (P1) and (P2) for the programmable controller circuit, the normally closed contact of the first switch (S1), the normally open contact of the second switch (S2), and the step S (S3) of 3 above. A parallel circuit with the normally closed contact of is connected. Further, the main circuit ports (P3) and (P4) for controlling the energization of the machine are provided with a normally open contact of the first switch (S1), a normally closed contact of the second switch (S2) and a third switch. The normally open contact of the switch (S3) is connected in series. A solenoid (17) is connected to the solenoid power supply ports (P5) and (P6). When the key unit (3) is not used as shown in FIG. 7, the first switch (S1) is provided between the programmable controller circuit ports (P1) and (P2) as shown by the chain double-dashed line. Normally closed contact and second switch (S2)
Of the first switch (S1) and the normally closed contact of the second switch (S2) are connected in series to the main circuit ports (P3) and (P4). Connected. By wiring in this way, there is no electrical hindrance when changing the combination of the units (1) to (3).

Next, with respect to the point that no mechanical trouble occurs even if the combination of the units (1) to (3) is arbitrarily changed, the plane of the safety switch body unit (1) excluding the lid body. 9A and 9B showing the figure and FIG. 10A to FIG. 10A sequentially showing the operation process by the switching actuator 5 of the passive operation portion 6 of the safety switch body unit 1.
The description will be made without reference to (c). First, in FIG.
In the passive operation part (6), a drive cam plate (20) and a pair of restricting cam plates located on both sides of the drive cam plate (20) are provided on a support shaft (19) spanned between a pair of support bases (18). The plate (21) and the plate (21) are rotatably mounted so as to overlap each other and independently of each other. Each cam-shaped plate (20), (21) has a structure shown in FIG.
, Two insertion holes (7a) and (7
By the two notches of the same shape formed respectively corresponding to b), the operating pressure receiving portion (2
2) and (23) and on the other side, the return pressure receiving portion (2
4) and (25) are formed respectively. In addition, the same cam follower pin (26) is inserted into each cam-shaped plate (20), (21), and the guide cam hole (2) is inserted.
7) and (28) are formed, and locking holes (29) and (30) into which the cam follower pins (26) are engaged are formed at the starting ends of the guide cam holes (27) and (28). The cam follower pins (26) are formed to communicate with each other in the moving direction of the cam follower pins (26) shown by the arrow A in FIG. 10, and the peripheral end portions near the guide cam holes (27) and (28) are notched to form engagement step portions. (31) and (32) are formed.

The lock lever (33) serves as a lock mechanism that mechanically locks the passive operating section (6) in the switching state of the switch section (4) by inserting the switching actuator (5). Above the (20) and (21), the lock lever (33) is movably arranged so as to be orthogonal to them, and the lock lever (33) is located above the cam plates (20) and (21). Each of the cam-shaped plates (20), (2
U-shaped locking rods (35) that engage with the respective engaging step portions (31) and (32) of 1) are integrally extended, and actuated from both ends of the base bar (34) respectively. A piece (36) is vertically installed and positioned on both left and right sides of the passive operation section (6). The lock lever (33) is urged by the coil sponges (37) from the front side at the upper portions of both ends, and the lower ends of the operating pieces (36) are pressed from the rear side by the coil springs (38). By being biased, it is constantly biased clockwise in FIG. 10 so that the locking rod (35) is in contact with the peripheral surfaces of the cam-shaped plates (20) and (21). It is held movable.
Further, in the combined state as shown in FIG. 1, as shown in FIG. 9, the operating rod (39) protruding from the solenoid unit (2) attached to the right side of the safety switch body unit (1) has an insertion hole (9). ), And the operating piece (3
It is in contact with the front side of the lower end portion of 6).

The operation of the above-described structure will be briefly described. When the switching actuator (5) is removed from the safety switch body unit (1), as shown in FIG. Plate (20) and regulating cam plate (2
1) means that the pressure receiving portions (22) and (23) for operation respectively correspond to the pressing surfaces (5a) of the switching actuator (5),
The guide cam holes (27) and (28) are overlapped with each other so that they can guide the cam follower pins (26). . Therefore, each cam plate (20), (21)
The cam follower pin (26) engages with any one of the locking holes (29) or (30) so that the cam-shaped plates () are not rotated by the switching actuator (5) while maintaining the initial rotational phase difference. The rotation of 20) to (21) is blocked, and the switching operation of the switch part (4) is prevented.

When each of the cam-shaped plates (20) and (21) is rotated counterclockwise in FIG. 10 by the switching actuator (5) to be inserted, the cam follower pin (26) is moved into each guide cam hole (). 27) and (28), the spring (4) is pushed backward and is guided by the guide portions (41) on both sides of the guide body (40).
It is moved in the direction of arrow A in FIG. 10 against the urging force of 2).
When the cam follower pin (26) is moved to the position shown in FIG. 10 (b), the switch changeover member (43) fixed to the front end of the cam follower pin (26) and the switch changeover body (44) connected thereto are removed. Both of them move backward and the switch part (4) is switched from the normally closed contact to the normally open contact. At this time, the locking rod (35) of the lock lever (33) slidably in contact with the peripheral end surfaces of the cam-shaped plates (20) and (21) by the rotational biasing of the coil springs (37) and (38).
Engages with the engagement step portions (31) and (32), and prevents the cam-shaped plates (20) and (21) from rotating clockwise in FIG. Therefore, even if the switching actuator (5) tries to move in the pulling-out direction, the return pressing surface (5
d) is brought into contact with the respective pressure-receiving parts (24), (25) of the respective cam-shaped plates (20), (21) whose rotation is blocked, and mechanically automatically switches to the switching state of the switch part (4). Locked.
Next, the solenoid (17) of the solenoid unit (2)
Is driven by suction, the actuating rod (39) moves to the position shown in FIG.
It is actuated in the direction of the arrow (c) to push the actuating piece (36), the lock lever (33) rotates counterclockwise, and the lock is released.

As mentioned above, each cam-shaped plate (20), (2)
1) on both sides of a lock lever (33) that mechanically locks by engaging with the engagement step portions (31), (32), and operating pieces (1) located at the left and right ends of the safety switch base unit (1). Three
6) and the insertion holes (9) are provided on both sides so as to face the respective operation pieces (36), the operation rod (39) can be provided on either side of the safety switch main unit (1). Even if the lock lever (33) is inserted through the insertion hole portion (9) and engaged with either of the left and right actuating pieces (36).
Can be operated in the same manner, and the solenoid unit (2) can be selectively attached to either the left or right side of the safety switch body unit (1) depending on the installation space.

The present invention is not limited to the above-mentioned embodiments, but may include various modifications without departing from the scope of the claims. For example, in the above-described embodiment, the case where the mounting recesses (10) of the same shape are formed at the opposite positions of the left and right side end portions on the bottom surface of the safety switch body unit (1) has been illustrated, but the safety switch body unit (1 ), Differently-shaped mounting portions may be formed at different positions on the left and right, and the solenoid unit (2) may be provided with protruding mounting pieces having a shape corresponding to the location corresponding to each mounting recess (10). .

[0021]

As described above, according to the safety switch device of the present invention, the main body portion excluding the switching actuator is
The safety switch body unit, solenoid unit, and key unit are divided into three parts, and mounting parts are formed at multiple points on the outer surface of the safety switch body unit, and mounting members that fit into the mounting part are integrated into the solenoid unit and key unit. In addition to fixing the solenoid unit to the safety switch body unit by selecting the required one of the mounting parts of the switch body unit and inserting and fixing the mounting member of the solenoid unit, Since the key unit's mounting member is inserted and fixed to the mounting part of, the three types of units can be arbitrarily combined and fixed to change the overall shape that fits the installation space without using any special member. can do. Also, since each existing type can be configured by combining three types of units,
The number of types can be reduced and a significant cost reduction can be achieved, and inventory management by unit can be facilitated.

[Brief description of drawings]

1A to 1C are a plan view, a bottom view and a right side view of an embodiment of the present invention, respectively.

2 (a) to (c) are a plan view, a bottom view and a right side view of a safety switch main unit having a partial configuration, respectively.

FIG. 3 is an exploded perspective view of the safety switch body unit and the switching actuator of the above.

4 (a) and 4 (b) are a plan view and a front view of a solenoid unit of a part of the above configuration.

5A and 5B are a plan view and a bottom view of a key unit that is a partial configuration of the same.

FIG. 6 is a plan view of the same when the combination of the units is changed.

FIG. 7 is a plan view when the combination of the units is further changed in the same as above.

FIG. 8 is an electric circuit diagram of the same.

FIG. 9 is a plan view of the safety switch body unit of the above-mentioned partial configuration with the lid body removed.

10 (a) to 10 (c) are right side views sequentially showing a part of the operation process of the safety switch body unit of the above.

[Explanation of symbols]

 1 Safety Switch Main Unit 2 Solenoid Unit 3 Key Unit 4 Switch Part 5 Switching Actuator 10 Mounting Recess (Mounting Part) 12 Solenoid Unit Mounting Piece (Mounting Member) 15 Key Unit Mounting Piece (Mounting Member) 17 Solenoid 33 Lock lever

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Norisuke Sasabe 1-10-40 Mikuni Honmachi, Yodogawa-ku, Osaka Izumi Electric Co., Ltd. (72) Masanori Nakayasu 1 Toyota-cho, Toyota-shi, Aichi Toyota Auto Car Co., Ltd.

Claims (1)

[Claims] 1. A safety switch body unit in which a switch section is switched by inserting / removing a switching actuator attached to a movable member such as a door, and the switch section is mechanically locked in a switching state by inserting the actuator. A solenoid unit having a solenoid for unlocking the lock state of the lock mechanism in the safety switch body unit, and a key unit that constitutes a key switch section that is manually switched are provided, and the safety switch body unit is provided at a plurality of positions on an outer surface thereof. Form the mounting part,
And in the solenoid unit and the key unit,
The safety switch is provided by integrally providing a mounting member that fits in the mounting portion, and by selectively fitting and fixing the solenoid unit and the key unit into the required mounting portion. A safety switch device that is integrally mounted on the main unit.