JPH072537Y2 - Locking device for security such as elevator doors - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety lock device for locking a movable frame body such as an elevator door to a fixed frame body such as a cage of an elevator.

[0002]

2. Description of the Related Art In a work elevator, the cage may be lifted and lowered while the door is open due to the desire to avoid the carelessness of opening and closing the door due to the familiarity of the workers who use it. It is the cause of the accident.

Further, the door which has been once closed may be accidentally opened while the cage is being raised or lowered, resulting in a fall accident of a worker.

[0004]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to prevent the movable frame body from being driven unless the movable frame body such as a door is closed and locked with respect to the fixed frame body such as a cage. It is an object of the present invention to provide a security lock device that is useful for preventing the above.

[0005]

The security lock device of the present invention will be described below with reference to the reference numerals in the accompanying drawings. The front and rear wall plates 3 of the support case 2 fixed to the fixed frame 1 are described below. , 4 is provided with a receiving groove 5 opened laterally at one end, and a switch 7 incorporated in the drive circuit of the fixed frame 1 is housed and fixed in the other end of the support case 2. Then, the lower end of the lock lever 8 is pivotally attached to the front and rear wall plates 3 and 4 of the support case 2 by a horizontal pivot 9 at an intermediate position between the switch 7 and the receiving groove 5. 10 is provided with a guide slot 11 into which the upper end of the lock lever 8 is inserted.

The upper end of the lock lever 8 rotated by its own weight contacts the inner end surface 12 on one side of the guide slot 11 and enters the receiving groove 5 when the lock lever 8 is in the inclined position, while the lock lever 8 The passive claw 14 which is pulled out from the receiving groove 5 when the lock lever 8 is in the standing position by contacting the inner end surface 13 on the other side of the guide slot 11 with the upper end portion,
The lock lever 8 is provided so as to project downward on the side surface of the middle portion thereof.

A cam slope 16 for rotating the lock lever 8 to the upright position when the lock bar 15 fixed to the movable frame 6 slides is provided on one side surface of the passive pawl 14 and the other side of the passive pawl 14 is provided. A lock groove 17 with which the lock rod 15 is engaged and disengaged is provided at the base of the side surface on the side of which is opened downward.

The intermediate portion of the operating lever 18 is pivotally attached to the front and rear wall plates 3 and 4 of the supporting case 2 by the horizontal pivot 9, and the receiving groove 5 is provided at the end portion on one side of the operating lever 18. An inward and outward cam slope 19 is provided downward, and an operation protrusion 20 of the switch 7 is provided at the other end of the operation lever 18.

[0009]

When the movable frame 6 is unlocked as shown in FIGS. 1 to 3, the lower end of the lock lever 8 is in the inclined position where it abuts on one inner end face 12 of the guide slot 11. The passive pawl 14 of the lock lever 8 is located so as to cross the receiving groove 5 of the support case 2 so as to intersect with the operating lever.
The cam slope 19 of 18 also enters the receiving groove 5. The operation protrusion 20 of the operation lever 18 is in a position where the actuator lever 21 of the switch 7 is not pressed.

When the movable frame 6 is moved in the closing direction,
The lock bar 15 enters the receiving groove 5 of the support case 2 and hits the cam slope 16 of the passive pawl 14. When the movable frame 6 further moves in the closing direction, the lock bar 15 slides on the cam slope 16 from the upper part to the lower part, and in this process, the lock lever 8 moves counterclockwise around the horizontal pivot 9 in FIG. Rotate. At the stage where the lock lever 8 stands up on the horizontal pivot shaft 9 by coming into contact with the other inner end surface 13 of the guide slot 11, the passive pawl 14 comes to a position retracted from the receiving groove 5, and the lock rod 15 is received by the receiving groove 5. Allows access to the innermost part of the.

After the lock rod 15 has entered the innermost portion of the receiving groove 5, the lock lever 8 instantly rotates in the clockwise direction by its own weight, as shown in FIG. 4, and is inserted into the lock groove 17 of the lock lever 8. The lock bar 15 is engaged, and the movable frame body 6 is locked to the fixed frame body 1 by this.

As described above, since the lock rod 15 pushes the cam slope 19 of the operation lever 18 in the process of the lock rod 15 entering the innermost portion of the receiving groove 5, as shown in FIG. -18 rotates counterclockwise around the horizontal pivot 9, and the operating projection 20 pushes the actuator lever -21. Therefore, the switch 7 is turned on, and the fixed frame 1
Since the drive circuit of 1 is closed, the fixed frame body 1 can be driven.

After the movable frame 6 is driven to a predetermined position, a finger is put on the upper end of the lock lever 8 and the lock lever 8 is rotated counterclockwise about the horizontal pivot 9, so that the fixed frame 1 is rotated. The locking of the movable frame body 6 with respect to is released.

When the movable frame 6 is moved in the opening direction, the lock bar 15 is separated from the cam slope 19 of the operating lever 18, so that the operating lever 18 is elastically actuated by the actuator lever 21 or the switch built-in spring. It is pushed by and is rotated in the clockwise direction about the horizontal pivot 9, and returns to the horizontal standby position shown in FIG.

[0015]

In the illustrated embodiment, the fixed frame 1 is a cage of a working elevator, and the movable frame 6 is a door which is guided by a rail 22 to move in the left-right direction. The switch 7 is a micro switch, and when the actuator lever 21 is pushed to the left, the internal contact is closed.

The lock bar 15 is bent into a U shape and has a base shape.
The suspension plate 23 is fixed to the end side surface of the movable frame body 6. The support case 2 is fixed to the side wall of the case by an L-shaped bracket 24. The horizontal pivot 9 is arranged close to the innermost part of the receiving groove 5, and the stopper pin 25 of the operation lever 18 is fixed to the diagonally upper left portion of the horizontal pivot 9, and the diagonal lower right of the horizontal pivot 9 is located. The stopper pin 26 of the lock lever 8 is fixed to the portion.

As a modified example of the present invention, a spring for urging the lock lever 8 to rotate to an inclined position is provided between the lock lever 8 and the support case 2, or the operation lever 18 is rotated to a horizontal standby position. A biasing spring may be provided between the operation lever 18 and the support case 2.

[0018]

As described above, in the security lock device of the present invention, the movable frame 6 is completely closed and the lock bar 15 moves into the innermost part of the receiving groove 5 of the support case 2 to move. When the frame body 6 is locked to the fixed frame body 1, the cam slope 19 of the operation lever 18 is pushed by the lock rod 15 and the switch 7 is turned on by the operation protrusion 20. It is impossible to drive the fixed frame body 1 while it is open. for that reason,
It is possible to prevent a fall accident from the fixed frame body 1 and the like, and has a simple structure and a necessary and sufficient security function.

[Brief description of drawings]

FIG. 1 is a front view of a safety lock device according to an embodiment of the present invention in an unlocked state.

FIG. 2 is a partially cutaway plan view of the safety lock device in an unlocked state.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view of the security lock device in a locked state.

[Explanation of symbols]

 1 Fixed Frame 2 Support Case 3 Front Wall Plate of Support Case 4 Rear Wall Plate of Support Case 5 Receiving Groove 6 Movable Frame 7 Switch 8 Lock Lever 9 Horizontal Pivot 10 Upper Wall Plate of Support Case 11 Guide Slot 12 Guide Slot Inner end surface 13 Inner end surface of guide slot 14 Passive claw 15 Lock bar 16 Passive claw cam slope 17 Lock groove 18 Control lever 19 Control lever cam slope 20 Control lever control projection 21 Switch actuator lever 22 Movable frame rail 23 Base plate of lock bar 24 Bracket of support case 25 Stopper pin 26 Stopper pin

Claims (1)

[Scope of utility model registration request] 1. A receiving groove 5 opened laterally in front and rear wall plates 3, 4 of a support case 2 fixed to a fixed frame 1 is provided at one end of the support case 2, and the other side of the support case 2 is provided. The switch 7 incorporated in the drive circuit of the fixed frame 1 is housed and fixed in the end portion on the side of
The lower end of the lock lever 8 is supported by a horizontal pivot 9 at a portion between the switch 7 and the receiving groove 5, and the front and rear wall plates 3, 4 of the case 2 are supported.
And a lock lever 8 on the upper wall plate 10 of the support case 2.
Is provided with a guide slot 11 into which the upper end of the lock lever 8 is fitted, and the upper end of the lock lever 8 rotated by its own weight abuts the inner end surface 12 on one side of the guide slot 11 and the lock lever 8 is in the inclined position. While entering the groove 5, the upper end of the lock lever 8 has the inner end surface 1 on the other side of the guide slot 11.
When the lock lever 8 comes into contact with the lock lever 8 and is in the upright position, the passive claw 14 that is protruding from the receiving groove 5 is locked by the lock lever 8.
A cam slope 16 is provided on a side surface of one side of the passive pawl 14 and projects downwardly on the side surface of the intermediate portion of the passive claw 14 to rotate the lock lever 8 to the upright position when the lock bar 15 fixed to the movable frame body 6 slides. A lock groove 17 for engaging and disengaging the lock rod 15 is provided downward at the base of the side surface of the other side of the passive pawl 14, and the intermediate portion of the operation lever 18 is supported by the horizontal pivot 9. A cam slope 19 that is pivotally attached to the front and rear wall plates 3 and 4 of the operation lever 18 and that moves in and out of the receiving groove 5 is provided at one end of the operation lever 18 so that the other side of the operation lever 18 is provided. A lock device for security of an elevator door or the like, which is provided with an operation protrusion 20 of the switch 7 at an end thereof.