JPH0543639B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention utilizes a rotating interlock lever attached to the door hanger of an elevator landing door to provide a dedicated key from the landing side during maintenance and inspection of the elevator or in an emergency. This invention relates to an unlocking device for an elevator hall door that can be unlocked by pressing the button.

[Technical background of the invention]

Elevator landing doors have a locking mechanism and a closing mechanism to prevent people from opening the door from the landing and falling into the hoistway, or getting caught between the elevator car and the landing. It is legally required to install a door switch so that the elevator operating circuit is closed only when the elevator is in use (a device that fulfills these two functions is called an interlock).

In addition, the landing door is unlocked so that maintenance personnel can open it from the landing side with a special key for the landing door when performing periodic maintenance inspections of the elevator or when rescuing passengers in an emergency. equipment is provided.

5 to 7 show a conventional unlocking device for an elevator hall door, in which a hall door 1 is suspended from a hanger rail 4 by a guide roller 3 attached to a door hanger 2 so as to be openable and closable. . An interlock lever 5 is attached to the door hanger 2, and a switch box 7 is attached to the header case 6.

The interlock lever 5 rotates in the locking direction around the branch 8 at the same time as the landing door 1 is closed, and the latch part 9 engages with the switch box stopper 10 and is locked, and at the same time, the closing confirmation switch 11 is engaged and the elevator is closed. The operating circuit is closed.

A connecting lever 12 is provided at the end of the lock lever 5.
is rotatably supported by a pin as shown in FIG. 6, and one end of an unlocking lever 15 is pivotally connected to the lower end of the connecting lever 12 by a pin. The unlocking lever 15 is pivotally supported on the inside of the panel of the landing door 1 so as to be able to move up and down, and is normally supported by a torsion coil spring 16.
However, when the interlock is released, the special key 14 inserted through the keyhole 13 provided in the door panel is rotated in the direction of the arrow in FIG. 6, and the connecting lever 12 is interlocked. Rotate the interlock lever 5 in the unlocking direction with
The lever latch portion 9 is disengaged from the switch box retaining fitting 10.

Note that during normal elevator door opening/closing, the engagement roller 17 provided on the interlock lever 5 is pushed by the engagement plate 18 attached to the car side door panel, causing the interlock lever 5 to move in the direction indicated by the arrow in FIG. Rotate it in the direction shown to unlock it.

[Problems with background technology]

However, in the unlocking device having the above structure, the unlocking lever 15 constantly rotates even when the elevator door is normally opened/closed, and there is a possibility that the unlocking lever 15 will wear out and make abnormal noises after long-term use. Since the unlock lever 15 is rotated against the force of the torsion coil panel 16, extra force (force that can resist the spring force) is required for the engagement plate 18 to rotate the interlock lever 5. This increased the load placed on the door drive device.

Further, since buckling strength of the connecting lever 12 is also required, the cross-sectional shape becomes large, which is an obstacle to making the landing door device thinner. Furthermore, when the unlocking lever 15 is lowered below a predetermined position when the unlocking device is installed, the interlock lever 5 is rotated clockwise in FIG. 6, reducing the contact pressure of the door switch 11. Because of this problem, the installation and adjustment of the unlocking device must be accurate, which complicates the installation process.

[Purpose of the invention]

This invention solves the above-mentioned conventional drawbacks, and provides a landing door with a simple structure and reliable unlocking operation, in which the unlocking lever does not rotate in conjunction with the movement of the Italock lever during normal door opening/closing. The purpose is to provide an unlocking device.

[Summary of the invention]

In order to achieve the above-mentioned object, this invention provides a long hole in the unlocking lever connecting portion of the connecting lever rotatably supported by a pin on the interlock lever, and the unlocking lever is connected to the long hole in the connecting lever. The end portions are slidably and rotatably connected to prevent the unlocking lever from rotating in conjunction with the movement of the interlock lever during normal door opening and closing.

[Embodiments of the invention]

A first embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 and 2. Codes 1 to 1 in the diagram
The configuration indicated by 1 is the same as that of the conventional example shown in FIGS. 5 to 7.

Thus, the unlocking device of the present invention is provided with a long hole 19 in the vertical direction at the lower end of the connecting lever 12 rotatably supported by a pin at the end of the interlock lever 5. An unlocking lever 15 rotatably supported (this rotary lever 15 is held in a horizontal state by a torsion coil spring 16, and the keyhole 13
The connecting pin 2 is rotated in the unlocking direction by the special key 14 inserted through the long hole 19.
They are slidably and rotatably connected by 0.

When unlocking the interlock lever 5 in an emergency, etc., the special key 14 is inserted through the keyhole 13 as in the conventional example described above, and the unlocking lever 15 is moved in the unlocking direction by rotating the special key 14. Rotate it. Then, the connecting pin 20 fixed to the unlocking lever 15 comes into contact with the lower end of the elongated hole 19, pulls down the connecting lever 12, and pulls down the connecting lever 12.
2, the interlock lever 5 rotates clockwise in FIG. 1 and is unlocked.

Further, when the door is normally opened and closed, the engagement plate 18 provided on the car side comes into contact with the engagement roller 17.
After this roller contact, the interlock lever 5 is rotated clockwise in FIG. 1 by moving the engagement plate in the direction of the arrow in FIG. 1, and the landing door 1 is unlocked. At this time, the connecting lever 12 also moves downward in conjunction with the movement of the interlock lever 5, but since the upper end of the elongated hole 19 does not come into contact with the connecting pin 20 when the connecting lever 12 moves, the unlocking lever 12 moves downward. 15 maintains the initial position without rotating.

As described above, in the unlocking device according to this embodiment, since the unlocking lever 15 does not operate during normal door opening/closing, there is no backlash or abnormal noise due to long-term operation, and the interlock lever 5 is not triggered by the engagement plate 18. There is no load increase during Furthermore, since no buckling load is applied to the connecting lever 12, it can be fabricated from a thin plate, making it possible to reduce the thickness of the landing door device. Furthermore, since the elongated hole 19 has a sufficient length, the connecting lever 12 and the unlocking lever 15
There is no functional problem even if the positional relationship is slightly shifted, and there is an advantage that almost no adjustment is required.

FIG. 3 shows a second embodiment of the present invention,
A connecting lever 24 connecting the interlock lever 5 and the unlocking lever 15 is a wire rope 21,
A pin supporting connection piece 22 having a round hole attached to the upper end of the wire rope 21 and the wire rope 2
Connecting piece 23 having a long hole 19 attached to the lower end of 1
The rest of the structure is the same as that of the first embodiment described above.

FIG. 4 shows a third embodiment of the present invention, in which the engagement roller 25 with the car-side engagement plate 18 is connected to the landing door 1.
A dog-shaped rotating lever 26 that is pivoted on the door panel of the
The other end of the rotating lever 26 and the end of the interlock lever 5 are connected to the lever 2.
7, and an elongated hole 28 is provided in the longitudinally intermediate portion of the connecting lever 27, into which the connecting pin 20 of the unlocking lever 15 is slidably and rotatably engaged. In the case of this embodiment, the elongated hole 28 is formed as an elongated hole with a size that is large enough in the left and right directions relative to the pin diameter of the connecting pin 20.

〔Effect of the invention〕

As mentioned above, the landing door unlocking device of this invention has the following features:
A long hole is provided in the unlocking lever connection part of the connecting lever pin-supported by the interlock lever, and this long hole connects the connecting lever and the unlocking lever so that they can slide and rotate. To provide a landing door unlocking device that does not cause an unlocking lever to operate wastefully when opening and closing, reduces the load when opening a door, is easy to install and adjust, and is stable in operation.

[Brief explanation of the drawing]

FIG. 1 is a rear view of the main part showing a first embodiment of the landing door unlocking device of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIGS. 3 and 4 are a second embodiment of the present invention. Example and third
A back view of the main part of the same part as FIG. 1 showing the embodiment,
Figure 5 is an overall back view of the elevator landing door, Figure 6
The figure is a rear view of the main part of a conventional landing door locking/unlocking device, and FIG. 7 is a longitudinal sectional view of FIG. 6. 1... Elevator landing door, 2... Door hanger, 5... Interlock lever, 12, 24,
27...Connection lever, 13...Keyhole, 14...Special key, 15...Unlocking lever, 19...Long hole, 20
...Connection pin.

Claims (1)

[Claims] 1. In an elevator landing door unlocking device that allows a rotating interlock lever attached to the door hanger of the elevator landing door to be unlocked from the landing side using a special key during elevator maintenance or emergencies, etc. A long hole is provided in the unlocking lever connecting portion of the connecting lever which is rotatably supported by a pin on the interlock lever. An elevator hall door solution characterized in that the ends are slidably and rotatably connected so that the unlock lever does not rotate in conjunction with the movement of the interlock lever during normal door opening/closing. Locking device.