JPH0133734Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a door lock that has an unlocking function in the event of an abnormality and is suitable for installation on an electric pivot door such as a substation in a building.

Electrical systems such as substation rooms contain electrical equipment that is being charged, so it is extremely dangerous for the general public to enter and exit the system unnecessarily. Therefore, these pivoted doors are equipped with locks and are locked when not in use, but conventionally, this type of lock cannot be used due to certain circumstances, such as when the keyhole is filled with something with strong adhesive properties. The key cannot be inserted into the keyhole, so in such a case, you must remove the hinge pin on one side or burn out the part of the door that the lock is attached to.
It was impossible to unlock. The object of the present invention is to provide a lock that can be easily unlocked from the outside in such a case with a single screwdriver, but with a structure that does not allow anyone other than the person concerned to know how to unlock the lock.

That is, in the present invention, a slide rod is protruded from the door side by spring force and is locked by locking it to a hook on the wall side, and a key seat having a keyhole is attached to the door with a screw. In addition to fixing the screw, the screw is shielded with a seal, and a hole is provided in the door on the back of the key seat, and a hole is also provided in the slide plate that is integrated with the slide bar, and these two holes are To make it possible to easily unlock the door even when an abnormal situation occurs by using this.

An embodiment of the present invention will be described below with reference to the drawings. In the diagram, 1 is the electric pivot door of a substation room, etc., 2 is the wall,
2a is a hook, 3 is a mounting plate fixed to the inner surface of the door 1 with four screws 4 shown in FIG. 8, 5 is a slide rod guide block fixed to one side of the mounting plate 3, and 6 is a mounting plate. 3 is a channel-type slide plate guide fixed on the other side; 7 is a guide rod arranged parallel to both ends of the slide rod guide block 5 and the slide plate guide 6; 8 is a guide rod 7 arranged between these two guide rods. A channel-type spring receiving plate is slidably fitted at both ends, 9 is a coil spring fitted to each guide rod 7 between the spring receiving plate 8 and the slide plate guide 6, and 10 is a slide rod guide block. A slide rod 5 is slidably inserted through the slide rod 10, and a slide plate 11 is connected in series with the slide rod 10. At the connecting portion between the slide plate 11 and the slide rod 10, the spring receiving plate 8 is also integrally connected by a rivet 12. combined. The end portion 11a of the slide plate 11 is slidably supported by the slide plate guide 6, and there is a rectangular opening 11b in the middle of the slide plate 11, and one side of the opening 11b has a rectangular opening 11b. A rack 11c is formed. Then, the key rotating shaft 13 having the gear 13a that meshes with the rack 11c is inserted into the opening 11.
The shaft 13 is rotatably provided through holes provided in the mounting plate 3 and the door 1, and the other end of the shaft 13 is supported by a bearing 14a provided in the cover 14.
15 is a screw for fixing the cover 14, 16 is an unlocking handle fixed to the inner protruding end of the shaft 13 with a screw 17, and 13b (see FIG. 8) is an unlocking handle that opens at the outer end of the shaft 13. It is a keyhole.

In the present invention, a hole 18 passing through the door 1 and the mounting plate 3 is provided in the vicinity of the keyhole 13b, a hole 19 is provided in the slide plate 11 substantially opposite to the hole 18, and the hole 19 and the keyhole 13b are located close to each other. Two screw holes 20 are placed in the position as shown in FIG.
will be established.

And the four screws 4 and keyhole 13 shown in Figure 8.
b. Form a key seat 21 that covers all of the hole 18 and the two screw holes 20, and fix the key seat 21 to the door 1 with two screws 22 (see Figure 7) that engage with the screw holes 20. At the same time, remove the two screws 2.
The tightening seat surface of No. 2 is recessed into an oval shape as shown in FIG. 7, and a seal 24 with an arrow indicating the direction of rotation of the key is attached inside this recessed portion 23 as shown in FIG.
Insert removably.

Further, the surface of the key seat 21 is slightly protruded into a disk shape, and a cap 25 enclosing this protrusion 21a is attached to the key seat 21 via an eccentric shaft 26 so as to be slidable and rotatable.

That is, the eccentric shaft 26 has one end fixed to the cap 25, is slidably inserted into the boss portion 21b provided on the key seat 21, and is inserted into the stepped portion 21 inside the boss portion 21b.
A coil spring 28 is fitted between the shaft 26 and a retaining ring 27 provided at the other end of the shaft 26.

FIG. 10 shows the key 29 of this lock, where 29a is the key shaft, 29b is the handle, and 29
Reference character c is a locking piece that is bendably provided at the tip of the key shaft portion 29a.

Next, a method of using the lock of the present invention constructed as described above will be explained. 1 to 5 show the door 1 in a closed and locked state. In this case, the slide rod 10 protrudes outward due to the action of the coil spring 9, and its tip engages with the hook 2a of the wall 2. To open the door 1 from this state, first grasp the cap 25 and pull it out against the coil spring 28 in the direction of arrow D in FIG.
Rotate in the direction of arrow E in the figure. In this way, the keyhole 13b is exposed, so if the shaft 29a of the key 29 shown in FIG. 10 is inserted into the keyhole 13b, the locking piece 29c at the tip will hit the bottom of the keyhole 13b. The locking piece 29c rotates in the direction of arrow F in FIG.
(See Figure 2). Therefore, if the handle 29b is rotated in the direction of arrow G in FIG. The door 1 is unlocked by moving in the direction of arrow H in FIG. 2 while being compressed. In addition, from inside the room, the unlocking handle 16 can be accessed from the third door.
It can be unlocked by rotating it in the direction of arrow I in the figure.

The above is the unlocking operation in a normal case, but if an abnormal situation occurs, for example, if the keyhole 13b is filled with foreign matter and the key 29 cannot be inserted, please perform the unlocking operation as follows. Can be locked.

That is, when the seal 24 is removed in the state shown in FIG. 6, the screws 22 are exposed as shown in FIG. 7, so remove these two screws 22 with a screwdriver and remove the key seat 21 from the door 1. If you remove the key seat 21, it will become as shown in Figures 8 and 9, so the hole 18
Slide the tip of the driver 30 through the slide plate 1.
When the door 1 is engaged with the hole 19 provided in the door 1 and pried as shown by the arrow J in FIG. be able to. Since the structure of this lock is unknown to the general public, there is no risk of it being opened by the general public.

Therefore, according to the present invention, even if an abnormal situation occurs with the lock, the door 1 can be easily opened, so it is possible to easily open the door 1 by removing the hinge pin of the door as in the conventional case, or by opening the door with the lock. An excellent effect can be obtained in that troublesome work such as burning off a portion is unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a partial front view of a door and wall with a lock according to the present invention, Fig. 2 is a cross-sectional view taken along line A-A, Fig. 3 is a view taken in the direction of arrow B in Fig. 2, and Fig. 4 is a partially cutaway state diagram of Fig. 3, and Fig. 5 is a state diagram showing C- of Fig. 4.
A sectional view taken along line C, Figure 6 is a diagram of the key holder shown in Figure 1 with the cap removed, Figure 7 is a diagram of the key holder with its seal removed, Figure 8 is a diagram of the key holder with its seal removed, FIG. 9 is a cross-sectional view thereof, and FIG. 10 is a plan view of the key. 1... Door, 2... Wall, 3... Mounting plate, 4... Screw, 5... Slide rod guide block, 6... Slide plate guide, 7... Guide rod, 8... Spring receiving plate, 9 ... Coil spring, 10 ... Slide rod, 11 ... Slide plate, 12 ... Rivet,
13... Key rotating shaft, 14... Cover, 16... Unlocking handle, 18... Hole, 19... Hole, 20...
...screw hole, 21...key seat, 22...screw, 23...
... recess, 24 ... seal, 25 ... cap,
26...Eccentric shaft, 27...Retaining ring, 28...Coil spring, 29...Key, 30...Screwdriver.

Claims (1)

[Scope of utility model registration request] Slide rod 10 is moved from the door 1 side by the force of spring 9.
In this case, the key seat 21 having the keyhole 13b is attached to the door 1 with the screw 22.
At the same time, the tightening seat surface of the screw 22 is recessed, a seal 24 is removably fitted into the recessed part 23, a hole 18 is provided in the door 1 on the back side of the key seat 21, and a hole 18 is provided in the door 1 on the back of the key seat 21. A hole 19 is also provided in the slide plate 11 that is integrated with the slide plate 10, and these two
A door lock characterized in that a tool can be inserted into two holes 18 and 19.