JPS6240036Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interlock device that uses a solenoid as a drive source for a restraining means that inoperably restrains a latch device that locks and locks a door to a fixed frame.

Various interlock devices have already been proposed that prevent the door from being unlocked or opened unless the preceding equipment, power supply, etc. are operated according to a certain operating procedure. When the door is locked, the door cannot be opened unless the predetermined operating procedure is repeated from the beginning.

However, depending on the type of equipment and the nature of the work, the door may be opened and closed many times over and over again, and even in that case, it may be difficult to perform all the above operating procedures from the beginning.
The work is complicated and inefficient.

Therefore, the purpose of the present invention is to restrain and maintain the restraining means of the latching device itself in an inoperable position when the door is repeatedly opened and closed continuously as described above, and when there is no particular safety problem. The object of the present invention is to provide a solenoid interlock device that allows the restraint means to operate accurately in accordance with its original purpose.

The solenoid interlock device of the present invention will be described below with reference to the drawings.
A tip end 5b is attached to the base end 4a of the latch plate 4 of the latch device 3.
a restraint lever 5 that engages with the lock lever 5; a spring 6 that biases the restraint lever 5 to rotate in the vertical direction of engagement with the latch plate 4;
The first solenoid 7 rotationally drives the restraint lever 5 in the direction of disengaging from the latch plate 4, and when the restraint lever 5 is rotationally driven in the direction of disengaging from the latch plate 4,
a lock plate 9 that engages with the base end groove 8 of the restraint lever 5 at the end of rotation; a second solenoid 10 that drives the lock plate 9 in the direction of disengaging from the restraint lever 5;
A switch 11 is incorporated in the excitation circuit of the first solenoid 7, and the switch 11 is opened by the restraint lever 5 when the lock plate 9 engages with the base end groove 8 of the restraint lever. It is something.

In the illustrated embodiment, the latch plate 4 is connected to the handle shaft 12.
By rotating the handle shaft 12 in the forward and reverse directions, the tip 4b of the latch plate engages and disengages from the solid frame 1 such as a building or a housing. The latch plate base end 4a that engages and disengages from the restraining lever 5 is formed into two consecutive serrations, and after the latch plate tip 4b partially engages with the fixed frame 1, the handle shaft 12 moves in the unlocking direction. It is designed so that it does not rotate. The circumferential side surface 5a of the proximal end of the restraint lever 5 is formed into an arcuate surface centered on a pivot shaft 14 that pivotally connects the restraint lever 5 to the base plate 13.
The lock plate 9 attached to the plunger 10a of the second solenoid 10 abuts against the circumferential side surface 5a of the proximal end of the restraint lever due to its own weight, and when the restraint lever 5 rotates, the lower end surface of the lock plate 9 touches the lever. It comes into sliding contact with the circumferential side 5a. When the second solenoid 10 is not arranged vertically, the lock plate 9 is urged toward the restraint lever 5 by the spring. Even when the second solenoid 10 is arranged vertically, this biasing spring may be used in combination with its own weight.

In this interlock device, when the door 2 is closed and locked, the distal end 5b of the restraining lever 5 engages with the base end 4a of the latch plate 4, as shown in FIG. Since this state is accurately maintained by the biasing spring 6 in the shape of a trapezoidal spring, the latch plate 4 is prevented from rotating in the unlocking direction. That is, the latching device 3 is locked inoperable.

Here, in order to release this restriction and enable the latching device 3 to operate, an exciting current may be applied to the first solenoid 7. The excitation of the first solenoid 7 causes the plunger 7a to be attracted to the right in FIG. Rotate clockwise in Figure 2. At the end of this rotation, the lock plate 9 engages with the proximal groove 8 of the restraint lever 5 as shown in FIG. Restricted and held. In this way, since the restraint lever 5 is held in an inoperable state, from now on,
The door 2 can be opened and closed many times and can be unlocked only by the latch device 3.

When the restraint lever 5 reaches the end of rotation as described above, the proximal protrusion 16 pushes the actuator lever 11a of the first solenoid switch 11, and in order to open the switch 11, the first solenoid 7 is Power is cut off. In this way, only the counterclockwise rotational bias by the spring 6 acts on the restraint lever 5, so that the engagement between the lock plate 9 and the restraint lever 5 is maintained accurately.

After the door 2 is closed and the fixed frame 1 is latched and locked by the latching device 3, an exciting current may be passed through the second solenoid 10 in order to disable the latching device 3 from operating in the unlocking direction. When the plunger 10a is activated by suction due to the excitation of the second solenoid 10,
Since the lock plate 9 is disengaged from the proximal groove 8 of the restraint lever 5, the restraint lever 5 is rotated counterclockwise by the bias of the spring 6. Thus, the latch plate 4 with the end portion 5b of the restraint lever in the door lock position
, and the latching device 3 is restrained in an inoperable state.

In this example, the restraint lever 5 is configured to be foldable in the middle, and the lever tip 5b that engages and disengages from the latch plate 4 is configured separately from the main body portion that is pivotally supported on the base plate 13 by the pivot 14. The substrate 13 is attached to the main portion.
It is pivoted by a transverse pivot 17 parallel to the . Further, a locking device 18 such as a cylinder lock is attached to the base plate 13, and a cylindrical cam 20 is fitted and fixed to a rotor 19 of the locking device 18. An inclined cam surface 21 is formed at the peripheral end of the cylindrical cam 20 on the substrate 13 side, and the extended portion 5c of the lever tip 5b above the pivot 17 engages with this cam surface 21. . The lever tip portion 5b is oriented in line with the main body portion by a posture retaining spring 24 fitted to the pivot shaft 17.

Therefore, when the key 23 is inserted through the head keyhole 22 of the lock device 18 exposed on the outside of the door 2 and the rotor 19 is rotated, the inclined cam surface of the cylindrical cam 20
1, the lever tip 5b is rotated clockwise in FIG. 3 against the bias of the posture holding spring 24. In this way, the lever tip 3b rotates in a direction away from the base plate 13 and separates from the latch plate base end 4a as shown by the chain line in FIG.
By this operation, the latch plate 4 can be turned in the unlocking direction. Latch plate 4 with this key 23 and cam 20
The release of the restraint is performed in an emergency when it is impossible to supply excitation current to the second solenoid 10 due to an accident such as a power outage. Incidentally, instead of the two solenoids, the first solenoid 7 and the second solenoid 10, only one latch-in type solenoid can be used to restrain and hold the restraining lever 5 in the inoperable position.

As described above, the solenoid interlock device of the present invention comprises the latch device 3 which engages with the fixed frame 1 to hold the door 2 in the closed position, the restraint lever 5 whose tip end 5b engages with the base end 4a of the latch plate 4 of the latch device 3, the spring 6 which urges the restraint lever 5 to rotate in the direction of engagement with the latch plate 4, the first solenoid 7 which rotates the restraint lever 5 in the direction of disengagement from the latch plate 4, the lock plate 9 which engages with the base end groove 8 of the restraint lever 5 at the end of its rotation when the restraint lever 5 is rotated in the direction of disengagement from the latch plate 4, the second solenoid 10 which drives the lock plate 9 in the direction of disengagement from the restraint lever 5, and a switch 11 incorporated in the excitation circuit of the first solenoid 7.
When the lock plate 9 is engaged with the base end groove 8 of the restraining lever, the switch 1 is pulled by the restraining lever 5.
Since the lock plate 9 and the biasing spring 6 cooperate to hold the restraint lever 5 itself in an inoperable position, in a situation in which it is necessary to repeatedly open and close the door and in which there are no particular safety concerns, the latch device 3 can be operated independently of the restraint lever 5 by not passing an excitation current through the second solenoid 10 during that time.
In other words, during that time, it is not necessary to release the restraint of the latch device 3 by repeating all the predetermined operating procedures from the beginning every time the door is opened or closed, and therefore the working efficiency is improved.

[Brief explanation of the drawing]

Figure 1 is a front view of a door equipped with a solenoid interlock device according to an embodiment of the present invention;
3 and 3 are a rear view and a left side view of the interlock device in the latching device restrained state, and FIG. 4 is a rear view of the latching device in the restrained state. 1... solid frame body, 2... door, 3... latch device,
4... Latch plate, 5... Restraint lever, 6... Biasing spring, 7... First solenoid, 8... Groove, 9...
...Lock plate, 10...Second solenoid, 11...
Switch for the first solenoid.

Claims (1)

[Scope of utility model registration request] A latching device 3 that engages with the fixed frame 1 to hold the door 2 in the closed position, a restraining lever 5 whose distal end portion 5b engages with the base end 4a of the latching plate 4 of the latching device 3, and the restraining lever 5. a spring 6 that rotationally biases the restraining lever 5 in the vertical direction of engagement with the latch plate 4; a first solenoid 7 that rotationally drives the restraining lever 5 in the direction of disengaging it from the latch plate 4;
When the restraint lever 5 is rotationally driven in the direction of disengaging from the latch plate 4, the lock plate 9 engages with the proximal groove 8 of the restraint lever 5 at the end of rotation, and the lock plate 9 is connected to the restraint lever 5. It consists of a second solenoid 10 driven in the disengagement direction and a switch 11 incorporated in the excitation circuit of the first solenoid 7, and when the lock plate 9 engages with the base end groove 8 of the restraint lever,
A solenoid type interlock device in which the switch 11 is opened by a restraining lever 5.