JPH07106863B2 - Elevator hall door unlocking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an elevator hall door for unlocking an interlock device for an elevator hall door from the hall side in an emergency or during regular maintenance inspections. Related to the unlocking device.

(Prior Art) Elevator doors consist of a landing door provided at the entrance / exit of a building and a car door provided on the side of a car. The opening / closing of this door is generally the door opening / closing installed on the side of the car. By the device, the movement of the car door is transmitted to the landing door side by the engagement plate provided on the car door and the engagement plate engagement device provided on the landing door, and the car door and the landing door are simultaneously opened and closed. is doing.

Here, the landing doors are opened and closed carelessly when the car is not on the prescribed floor, so that people do not fall into the hoistway, and when the landing doors are open, the car moves and causes personal injury. To prevent it from being triggered, a lock mechanism for the landing door and a door closing confirmation switch that closes the operating circuit of the elevator only when the landing door is closed are provided, and these two functions are combined into one device. The interlock device is summarized in.

Further, at the landing door, when performing regular maintenance and inspection of the elevator, when performing rescue of passengers in an emergency, etc., maintenance personnel unlock the interlock device from the landing side with a dedicated key, An unlocking device is provided to allow the landing door to be opened.

FIG. 4 is a rear view of the hall door 1 viewed from the hoistway side. The hall door 1 is suspended in the header case 2 via the door hanger rail 3, the guide roller 4, and the door hanger 5, and the lower portion of the hall door 1 is shown. Is guided by a guide shoe 6 and a sill 7. An interlock device 8 is mounted on the top of the landing door 1, and a fixed switch box 9 is mounted on the door closing side end of the header case 2.

The interlock device 8 is biased by a spring 11 (compression spring) in the locking direction and pushes the door closing confirmation switch 13 with a constant contact pressure so that the rotation limit of the locked state is the contact of the lever protrusion 10b with the stopper 8t. The interlock lever 10 of the rotation type as shown in FIG. 5 is regulated by contact, and the tip latch portion 10a of the interlock lever 10 is provided.
Is guided to the inclined surface of the switch box stopper 9a by the closing of the hall door 1, and enters the switch box 9 while being rotated in the counterclockwise direction in FIG. Simultaneously with the closing of 1, the interlock lever 10 is rotated by the action of the spring biasing spring 11 around the fulcrum 12 in the locking direction (clockwise direction in FIG. 5a) within a certain angular range, that is, the lever protrusion 10b is the stopper. Rotate until it hits 8t,
The latch portion 10a at the tip of the lever engages with the stopper 9a of the switch box 9 to be locked, and at the same time, the door closing confirmation switch 13 is turned on with a constant contact pressure by the push-up contact of the latch portion 10a, The elevator driving circuit is now closed.

As an unlocking device for the landing door 1 including the interlock device 8 as described above, the one disclosed in Japanese Patent Application No. 57-206126 is known. As shown in FIGS. 5 and 6, an unlocking metal fitting 14 formed in an L shape is fixed to an intermediate position between the fulcrum 12 of the interlock lever 10 and the tip latch portion 10a, and is provided on the door hanger 5. Three-way frame 15 and landing door 1 through an open hole (not shown)
It extends right above the gap 16 and is projected below the door hanger rail 3 so as to be positioned as shown in FIG. 5 (b).

When unlocking, as shown in Fig. 5 (b), a three-sided frame
From the gap 16 between the hall 15 and the landing door 1, an unlock key 17 as a dedicated key having a plate-like notch 17a at the tip is inserted, and the tip notch 17a of the unlock key 17 is unlocked as shown in FIG. When hooked on the locking metal fitting 14 and pulled down, the interlock lever 10 is unlocked in the unlocking direction (the fifth
The door-closing confirmation switch 13 is turned off and the mechanical lock is released by rotating the door 1 in the counterclockwise direction in FIG. A) so that the hall door 1 can be freely opened.

(Problems to be Solved by the Invention) However, in the unlocking device having the above-described structure, since the rotational moment due to the weight of the unlocking metal fitting 14 acts in the direction of unlocking the interlock lever 10, the switch There is a concern that the contact pressure of 13 may be reduced and contact failure may occur. Further, since the rotation moment due to the weight of the interlock lever 10 also acts in the unlocking direction, if the rotation biasing spring 11 of the interlock lever 10 is damaged due to some reason, the hall door 1 can be freely opened and closed. It became possible, and there was a risk that passengers would accidentally fall into the hoistway.

This invention eliminates the above-mentioned conventional drawbacks, does not reduce the contact pressure of the door closing confirmation switch, and has the function of maintaining the locked state even when the rotation biasing spring of the interlock lever is damaged. An object of the present invention is to provide an unlocking device for a landing door, which can surely perform an unlocking operation from the landing side in an emergency or at the time of maintenance and inspection.

[Structure of Invention]

(Means for Solving the Problems) In the solution means of the present invention, the unlocking metal fitting is fixed to a position on the opposite side of the latch sandwiching the rotation fulcrum of the interlock lever, and the interlocking metal fitting is provided with the interlocking metal. A balance weight that can hold the lock lever in a locked state is provided, and the rotation moment around the rotation fulcrum due to the total weight of the balance weight and the unlocking metal fitting is M ₁
And the balance weight having a weight such that M ₁ > M ₂ is provided on the unlocking metal fitting, where M ₂ is a rotation moment around the rotation fulcrum due to the own weight of the interlock lever. It is an unlocking device for elevator hall doors.

(Operation) By fixing the unlocking metal fitting at the position opposite to the latch that sandwiches the rotation fulcrum of the interlock lever, the weight of this unlocking metal works as a force to rotate the interlock lever in the locking direction at all times. It does not reduce the contact pressure of the interlock lever and the door close confirmation switch,
It is possible to prevent contact failure of the switch. In addition,
Since the rotation limit of the interlock lever is restricted by the stopper, the contact pressure of the switch does not increase even when the weight of the unlocking metal piece acts in the locking direction as described above. .

Also, by providing the above-mentioned balance weight on the unlocking metal fitting, even if the rotation biasing spring of the interlock lever is damaged, the locked state of the interlock lever is maintained and the landing door can be freely opened. Accidents due to being opened can be prevented.

〔Example〕

A first embodiment of the present invention will be described below in detail with reference to the drawings of FIGS. 1 and 2, and the structure of an interlock device 8 equipped on the elevator hall door 1, that is, reference numerals 1 to 1 in the drawings. The configuration indicated by 13 is the same as the configuration of the conventional example shown in FIGS. 4 and 5, and therefore detailed description of the configuration is omitted.

Thus, according to the present invention, the unlocking metal fitting 20 that is unlocked from the landing side of the interlock device 8 has a structure as shown in FIG. 2, that is, one rising end of the groove type main body is the mounting portion 20a, and the main body The unlocking operation part 20b extending from the upper end of the rising part at the other end in a direction perpendicular to the other side is used as the metal fitting configuration.
An integral balance weight 19 is provided at 0. Then, the unlocking metal fitting 20 is fixed to a position opposite to the latch portion 10a sandwiching the rotation fulcrum 12 of the interlock lever 10 by bolting the metal fitting mounting portion 20a to the lever lower end projecting portion 10c as shown in FIG. It is fixed as shown in (a). At this time,
The unlocking operation part 20b as an extension part of the unlocking metal fitting 20 is provided with a three-way frame 15 through an opening hole 5a provided on the front surface of the door hanger 5.
And the extension length so as to come directly above the gap 16 between the landing door 1 and the lower part of the door hanger rail 3 as shown in FIG.
It is projected so that it may be located like.

The balance weight 19 has a rotation moment around the fulcrum 12 due to the total weight of the unlocking metal fitting 20 and the balance weight 19 as M _1, and a rotation moment around the fulcrum 12 due to the own weight of the interlock lever 10 as M _2. , M ₁ >
Hold the interlock lever 10 in the locked state (locked state) even if the turning biasing spring 11 of the interlock lever 10 is cut off for some reason, having a weight of M _2. You can do it.

When unlocking the unlocking device configured as described above in an emergency or during maintenance and inspection, the plate-type unlock key 21 as a dedicated key is inserted through the gap 16 between the three-way frame 15 and the landing door 1. Insert the unlock key as shown in Fig. 1 (b).
When the upper end of 21 is brought into contact with the unlocking operation portion 20b of the unlocking metal fitting 20 and pushed up, the interlock lever 10 moves to the fulcrum 12
Is rotated in the unlocking direction (counterclockwise direction in FIG. 1a), the door closing confirmation switch 13 is turned off, and the lever tip latch portion 10a is disengaged from the switch box stopper 9a, The door 1 can be opened freely.

As described above, the unlocking device according to the present embodiment is the unlocking metal fitting.
Since the weight of 20 acts on the interlock lever 10 as a rotation moment in the locking direction, the contact pressure of the switch 3 is not reduced, and contact failure or the like can be prevented. In this case, since the rotation limit of the interlock lever 10 in the locked state is regulated by the stopper 8t, even if the weight of the unlocking fitting 20 acts in the locking direction as described above, the switch The contact pressure of 13 does not increase.

Further, since the unlocking metal fitting 20 is provided with the balance weight 19 having a weight such that the rotation moment M ₁ > M ₂ , the interlock lever 10 is prevented from being broken even if the rotation urging spring 11 of the interlock lever 10 is broken. It is possible to prevent the accident such as the fall of passengers due to the free opening of the hall door 1 while maintaining the locked state of 10. Furthermore, there is an advantage that it can be easily applied to the existing interlock device 8 and the performance can be improved.

FIG. 3 shows a second embodiment of the present invention, in which an unlocking metal fitting 22 having a balance weight 19 is formed in an L shape,
Insert the rod-shaped unlock key 24 into the key hole 23 provided in the landing door 1, and bring the tip 24a into contact with the lower surface of the unlocking metal fitting 22 to push the unlocking metal fitting 22 upward. This is different from the first embodiment in that the interlock lever 10 is unlocked by operating a key. Since other configurations and operations are similar to those of the first embodiment, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

〔The invention's effect〕

Since the elevator hall door unlocking device of the present invention is as described above, it is possible to eliminate the contact pressure reduction of the door closing confirmation switch and solve the problems such as poor contact, and also the interlock lever There is an effect that the danger when the rotation urging spring is damaged can be prevented beforehand.

[Brief description of drawings]

FIG. 1 (a) is a rear view of a main part showing a first embodiment of the present invention, FIG. 1 (b) is a left side view of FIG. 1 (a), and FIG. 2 is a first embodiment. FIG. 3 (a) is a perspective view of an applicable unlocking metal fitting, and FIG. 3 (a) is a rear view of the essential parts showing the second embodiment of the present invention.
Figure (b) is a left side view of Figure 3 (a), Figure 4 is a conventional explanatory view showing the entire back surface of the elevator hall door, and Figure 5 (a).
Is a rear view of the main part of a conventional landing door locking / unlocking device, FIG. 5 (b) is a left side view of FIG. 5 (a), and FIG. 6 is a conventional unlocking method using an unlock key. FIG. 1 ... Elevator hall door, 8 ... Interlock device, 8t ... Stopper for restricting rotation limit of interlock lever, 10 ... Rotating interlock lever, 10a ... Latch part, 11 ... Interlock Lever rotation bias spring,
12 …… Interlock lever rotation fulcrum, 13 …… Door close confirmation switch, 19 …… Balance weight, 20,22 …… Unlocking metal fitting, 21,24 …… Unlock key as a dedicated key.

Claims (1)

[Claims] 1. An interlock device provided on an elevator hall door is urged by a spring in a locking direction in a locking direction, and a stopper limits a rotational limit of a lock state in which a door closing confirmation switch is pressed with a constant contact pressure. The unlocking metal fitting is fixed to the rotating interlock lever, and the interlock lever is rotated in the unlocking direction by operating the unlocking metal fitting from the landing side with the dedicated key. In the unlocking device for elevator landing doors, the unlocking metal fitting is fixed at a position opposite to the latch sandwiching the pivot of the interlock lever, and the interlock lever is locked to the unlocking metal fitting. provided with a balance weight which can be held in the state, the rotation moment about the pivot point by the total weight of this balance weight the unlocking fixture and M ₁ When the rotational moment about the pivot point due to the weight of the interlock lever and M _2, the elevator is characterized by providing the balance weight of the weight of the M _1> M ₂ in the unlocking fixture hall Door unlocking device.