JP3014862B2 - Elevator car door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car lock apparatus provided to prevent a car door from being opened when a car is raised or lowered.

[0002]

2. Description of the Related Art Generally, when a car door is intentionally opened from the inside of a car while the elevator is running, the elevator is suddenly stopped, and there is a risk that passengers may be trapped in the car or fall into the hoistway. For this reason, an elevator car door lock device that mechanically locks a car door while the elevator is traveling has been proposed.
No. 4,879,795 is known and is shown in FIGS. FIG. 3 is a front view showing the entire surface of the car 1, in which car doors 2 and 3 are provided on the front of the car 1, and hangers 4 fixed above the car doors 2 and 3.
5 is provided with a plurality of rollers 6 rotatably. The car doors 2 and 3 are opened and closed by a door opening / closing device (not shown). At this time, the plurality of rollers 6 roll along a door rail 7 fixed to a rail frame 10. Between the hanger 4 and the rail frame 10, a car door locking device whose details are shown in FIG. 4 is formed. That is, the first engaging member 1 extending in the horizontal direction with a notch at the left end of the hanger 4.
1 is fixed, and a second engaging member 8 is provided to face the first engaging member 11 when the car door 2 is in the closed state. The second engaging member 8 is connected to an operating shaft 12 of an electromagnetic device 9 provided at a position deviated leftward from an upper portion of the hanger 4, and is always connected to the first engaging member by a return spring 14. 11 is held at a position where it has been disengaged from 11. But,
When the electromagnetic device 9 operates, the operating shaft 12 is driven upward against the return spring 14, and the second engaging member 8 is engaged with the notch of the first engaging member 11.

Accordingly, when the door is closed, the first engaging member 11 fixed to the hanger 4 of the car door 2 faces the second engaging member 8, and in this state, the electromagnetic device 9 is turned off. Since the second engagement member 8 can be excited and driven upward through the operation shaft 12 to be engaged with the first engagement member 11, the electromagnetic device 9 continues to be excited while the elevator is traveling. The car doors 2 and 3 cannot be opened by releasing the above-mentioned engagement.

[0004]

However, in the above-described car door locking device for mechanically locking the car door while the elevator is running, the first engaging member 11 is led out substantially horizontally above the hanger 4. Therefore, the electromagnetic device 9 must be disposed at the left end of the door rail 7. Therefore, when the car doors 2 and 3 are single-sided doors that open in one direction, the mounting space of the electromagnetic device 9 is required. However, the mounting work has become difficult, and the door rail 7 has to be unnecessarily lengthened.

[0005] It is an object of the present invention to provide an elevator car door lock device which is easy to mount.

[0006]

In order to achieve the above object, the present invention has a first engaging member projecting upward from a car door and fixed, and a first engaging member at a position where the car door is closed. an electromagnetic device mounted on landing the upper frame facing the engagement member, this
An actuation shaft driven by the electromagnetic device and movable in the vertical direction, and a second engagement member connected to a lower end of the actuation shaft.
Has also engagement of the first engagement member the second engagement member via the actuating shaft by the driving of the solenoid device
In the elevator car door locking device adapted to be moved to the release position, the rigidity of the second engaging member is reduced.
Monodea was composed of less material than the stiffness of the actuating shaft <br/> Ru.

[0007]

[Function] When the car door closes, the electromagnetic device is driven to operate.
Move the moving axis downward. As a result,
Position facing the first engaging member protruding and fixed toward
The second engaging member also moves to engage with the first engaging member.
And lock the basket door. At this time, the basket door is forcibly opened.
If you try to open the door, you will be more rigid than the operating shaft.
The second engaging member made of a material with smaller
After that, the basket will land and open.
At times, the electromagnetic device will not be able to open the door
No.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an elevator car door lock device according to an embodiment of the present invention. A bracket 15 is provided on the rail frame 10.
Are attached by bolts 18, and the electromagnetic device 9 shown in detail in FIG. The operating shaft 17 of the electromagnetic device 9 is constantly urged by a return spring 14 in a direction of disengaging, which will be described later, that is, upward, and has a lower end provided with a first engagement detachable by a nut 20. The member 11 is attached. This second engagement member 8
It deforms when a predetermined force or more is applied, and its rigidity is made smaller than the rigidity of the operating shaft 17 , and its lower end is located above the hanger 4 as can be seen from FIG. .

On the other hand, a first engaging member 11 is fixed to the hanger 4 of the car door 2 in a closed state at a position facing the second engaging member 8. 11 the upper end extend substantially lead straight direction protrudes than hangers 4. The electromagnetic device 9 is excited and the operating shaft 17 is returned to the return spring 1
When the first engaging member 11 descends against the door 4, the first engaging member 11 is prevented from moving in the door opening direction by the second engaging member 8.
However, in the electromagnetic device 9 is in a non-energized state,
The second engaging member 8 is positioned upward by the return spring 14.
And, it does not engage the first engagement member 11, car door 2
Is not prevented from moving in the door opening direction. Roller 6 which is rotatable supported on the hanger 4, and roll on the door rail 7 fixed to the rail frame 10, which opening and closing operation of the by connexion car-door 2 and 3 is performed.

[0010] The car door 2 prior to running the elevator
When the door 3 is closed by a door opening / closing device (not shown) and reaches the position shown in FIG. 1, the electromagnetic device 9 is excited to drive the operating shaft 17 downward against the return spring 14. Then, the second engagement member 8 engages with the first engagement member 11 and the car door 2
Open side of the 3 to prevent the movement of the direction. Thereafter, when the vehicle is traveling toward a predetermined floor, the second engagement member 8 is engaged with the first engagement member 11 even if the car doors 2 and 3 are intentionally pryed open from within the car. The car doors 2 and 3 cannot be opened. In addition, the cage doors 2 and 3 with a predetermined force or more
Is intentionally pryed open, the second engagement member 8 is deformed prior to the deformation of the operating shaft 17 . Therefore, then
When the electromagnetic device 9 is demagnetized upon arrival at a predetermined floor, the operating shaft 12 is held in a disengaged position by the return spring 14 without being stuck, and the car door 2 is opened by the door opening / closing device. 3
Can be opened. In order to replace the deformed second engaging member 8, the nut 20 shown in FIG. 2 is loosened, the deformed second engaging member 8 is removed, and the nut 20 is replaced with a new second engaging member 8. tightening Ru.

In general, a switch or the like for detecting the closed state of the car doors 2 and 3 is provided above the door rail 7 to hinder the installation of a new electromagnetic device 9. Since the attached second engaging member 8 is located above the hanger 4, it does not interfere with such devices. Moreover, in the case where a hanger in which the pair of hangers 4 provided on the hanger 4 of the car door 2 are integrally connected is used, the electromagnetic device 9 and the like may be located at the upper part of the hanger. It can be provided at an appropriate position shifted to the left and right, and the degree of freedom in the arrangement increases. In addition, since the electromagnetic device 9 and the like are disposed above the hanger 4, it is necessary to form a space at the left end of the door rail 7 in FIG. 1 as in the related art, or to further extend the left end of the door rail 7 particularly in the case of the one-way opening method. Therefore, this part can be simplified.

[0012]

By the present invention as described above, according to the present invention lever, the first
One engaging member is fixed by protruding upward from the car door.
Only, first at the second engagement member is car-door is in the closing position
Engagement member facing the Rutotomoni provided at the lower end of the operating shaft of the electromagnetic device mounted on landing the upper frame position, the second engagement member As a
Is made of a material whose rigidity is smaller than the rigidity of the operating shaft.
Extra space for locking devices in the opening and closing direction of the car door
It is not necessary to secure
Installation is easy, and there are no passengers when the car door is closed.
When trying to open the basket door naturally, the rigidity is low.
Since the engaging member of 変 形 deforms before the operating shaft,
When the door is opened at the time of landing, the electromagnetic device causes a stiffness and the door cannot be opened.
Function can be prevented, and replacement of deformed parts
Also requires only the second engaging member, so that the damage
Can also be limited to minor ones .

[Brief description of the drawings]

FIG. 1 is a front view showing an elevator car door locking device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the elevator car door locking device shown in FIG.

FIG. 3 is a front view showing a conventional elevator car door locking device.

FIG. 4 is an enlarged view of a main part of the elevator car door locking device shown in FIG. 3;

[Explanation of symbols]

2,3 car door 4,5 hanger 8 second engaging member 9 electromagnetic device 11 first engaging member 17 operating shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66B 13/18

Claims (1)

(57) [Claims] A first engaging member protruding upward from a car door and fixed ; and an electromagnetic device mounted on a landing upper frame facing the first engaging member at a position where the car door is closed. ,
An actuating shaft driven by the electromagnetic device and movable in a vertical direction, and a second engaging member connected to a lower end of the actuating shaft.
Has also engagement of the first engagement member the second engagement member via the actuating shaft by the driving of the solenoid device
In the elevator car door locking device adapted to be moved to the release position, the rigidity of the second engaging member is reduced.
An elevator car door lock device comprising a material smaller than the rigidity of the operating shaft .