JP2002138734A - Locking device for door of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device of a door for an elevator capable of preventing generation of harsh noise when a cage ascends/descends. SOLUTION: A locking metal fitting 2 is fitted to one side part of an opening and closing door 1 of the elevator, a latch 4 hooked on the locking metal fitting 2 to put the opening and closing door 1 in the closed state is rotatably mounted on a rail 3 for the opening and closing door 1, and with the cage 11 placed on the rear face of the opening and closing door 1, magnets 7, 15 are respectively mounted on the latch 4 and a rail 13 for a front door 12 of the cage 11 with the N-poles opposite to each other, whereby when the cage 11 reaches the rear face of the opening and closing door 1, the latch 4 is turned without contacting the cage 11 by repulsive force working between the magnets 7, 15 to be removed from the lock metal fitting 2 so that locking of the opening and closing door 1 is released not to generate contact noise with the latch 4 when the cage 11 ascends/descends.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device for locking an opening / closing door of an elevating device for vertically transporting an object in a building.

[0002]

2. Description of the Related Art In a lifting device for vertically transporting an object by a cage that moves up and down in a building, an object is loaded into and out of the cage to prevent falling of a person or an object from a doorway in the building into a cage hoistway. In many cases, an opening / closing door is provided to cover the entrance, and a door lock device for locking the opening / closing door so as to prevent the door from opening unless there is a cage on its rear surface is often attached.

FIGS. 5 to 7 show an example of this type of door lock device for a lifting device. As shown in FIGS. 5 and 6, this door lock device includes a lock fitting 5 on one side of an opening / closing door 51.
2 and a latch 54 attached to a rail 53 for the opening / closing door 51 is hung on the lock fitting 52, and the opening / closing door 51
Is kept closed. The latch 54 is rotatable in a vertical plane. When a lock roller 55 attached to one end of the latch 54 is pressed by a trapezoidal lock cam 59 attached to a rail 58 for a front door 57 of a cage 56, the lock is locked. It is designed to rotate in a direction away from the fitting 52. Further, a spring 60 for holding the latch 54 in a state of being hooked on the lock fitting 52 is attached to the latch 54.

Therefore, when the cage 56 is not on the rear surface of the door 51, the latch 54 is hooked on the lock fitting 52 as shown in FIG. 7 (a), and the door 51 is locked in a closed state. When the cage 56 comes to the rear surface of the opening / closing door 51, as shown in FIG. 7B, the lock cam 59 presses the lock roller 55 to rotate the latch 54, and the latch 54 comes off from the lock fitting 52. The lock of the door 51 is released. The latch 54 and the lock fitting 5 at this time
2 is adjusted by changing the attachment position of the lock roller 55 to the latch 54.

[0005]

In the above-mentioned conventional door lock device, when the cage comes to the rear surface of the door, that is, when the cage stops at the rear surface of the door for loading and unloading an object, and when the cage is opened and closed, Each time the vehicle passes through the rear surface, a sound is generated between the lock roller and the lock cam, which is annoying.

In order to reduce the contact noise, the lock roller may be mounted at a position where the allowance for pushing by the lock cam is as small as possible. On the other hand, the lock roller has an opening / closing door between the latch and the lock fitting when the lock is released. To some extent, it must be installed at a position where it is pushed into the lock cam so that a gap can be opened and closed smoothly. Therefore, it is necessary to finely adjust the mounting position of the lock roller so that the contact sound is as small as possible and the movement of the opening / closing door is not hindered.

It is an object of the present invention to provide a door lock device for a lifting device which does not generate harsh sounds when the cage moves up and down.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a cage which moves up and down in a building, and a door which covers an entrance in and out of the building for carrying objects into and out of the cage. In a door lock device of the elevating device for locking the opening / closing door to a closed state by latching the opening / closing door with a latch, the latch is attached to a building, the latch is attached to the opening / closing door, and the latch is hung on the latch. In a state where the cage is located on the rear surface of the opening / closing door, a magnet is attached to one of the latch and the cage, and a magnet or a magnetic body is attached to the other while facing the other. When the cage comes to the rear surface of the opening / closing door, the latch is disengaged from the stopper by a repulsive force or a suction force acting between the latch and the magnetic body. Than is adopted the configuration.

In other words, a magnet is attached to one of the latch and the cage and a magnet or a magnetic body is attached to the other of the latch and the cage in a state where the cage is on the rear surface of the opening / closing door, so that these magnets or the magnet and the magnetic body are attached. Due to the repulsive force or suction force acting between the latch and the cage, when the cage comes to the rear surface of the door, the latch comes off the stopper without coming into contact with the cage, and the door is unlocked, The contact noise with the latch when raising and lowering the cage was not generated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an opening / closing door 1 of an elevating device to which a door lock device according to an embodiment is attached. This opening / closing door 1 has a wire 1d in which upper and lower movable doors 1a and 1b are hung on a door roller 1c.
The door lock device is for opening and closing doors that guide the upper and lower doors 1a and 1b to a lock fitting 2 attached to one side of the upper door 1a. The latches 4 attached to the rails 3 hold the doors 1a and 1b in a closed state.

As shown in FIGS. 2 and 3, the lock fitting 2 is formed by bending a metal plate to form a mounting portion 2a for the upper door 1a at one end and a receiving portion for the latch 4 at the other end. 2b
Are formed. The latch 4 made of a metal plate is attached to the opening / closing door rail 3 fixed to the three-sided frame 5 on the building side. One end of the latch 4 intersects with the receiving portion 2a of the lock fitting 2, and the upper door 1a moves upward. It does not open.

The latch 4 is rotatable around a shaft pin 6 fixed to the rail 3.
On the side opposite to the side in contact with
The magnet 7 is attached to a with the N pole inside. In addition, a rectangular hole 4b is provided substantially at the center of the latch 4, and the tip of the stopper pin 8 fixed to the rail 3 protrudes from the hole 4b. The outer diameter of the shaft pin 6
A torsion coil spring 9 is fitted and is prevented from falling off by a cylindrical member 10. Both ends of the spring 9 are hooked on a stopper pin 8 and a latch 4, respectively, and the latch 4 is held in a state of being hooked on the lock fitting 2. It has become.

A cage 1 that moves up and down on the rear side of the door 1
1 is provided with a front door 12 that opens up and down similarly to the opening and closing door 1, and a rail 13 that guides the front door 12. A magnet 15 is mounted on the rail 13 via a mounting plate 14 at a position facing the inside of the magnet 7 on the side of the latch 4 when the cage 11 comes to the rear surface of the opening / closing door 1 with the N pole facing outward. ing.

Therefore, when the cage 11 is not on the rear surface of the door 1, as shown in FIG. 4A, the latch 4 is hooked on the lock 2 so that the door 1 is locked in a closed state. When the cage 11 comes to the rear surface of the door 1, as shown in FIG. 4B, the inside of the magnet 7 and the outside of the magnet 15, both of which are N poles, face each other and act between the two magnets 7, 15. The repulsive force causes the latch 4 to rotate around the shaft pin 6 while elastically deforming the spring 9 without coming into contact with the cage 11 and come off the lock fitting 2,
The lock of the door 1 is released. In this state, the cage 11
Is stopped, the unlocked door 1 and cage 1 are unlocked.
1 to open the front door 12 and carry the object into the cage 11;
Unloading can be performed. Then, when the cage 11 moves from the rear surface of the door 1, the restoring force of the spring 9 causes the latch 4 to rotate in the direction opposite to that at the time of unlocking and to be hooked on the lock fitting 2, and the door 1 is locked again.

The mounting of each magnet does not need to consider the contact noise between the latch and the cage as in the conventional door lock device, so that the opening and closing door can be smoothly moved between the latch and the lock fitting when the lock is released. It is sufficient that a sufficient interval for opening and closing is provided, and it is not necessary to finely adjust the mounting position and the like.

Further, since the magnet is smaller than the lock roller and the lock cam which are parts of the conventional door lock device, the mounting space can be reduced.

In the above embodiment, the latch magnet and the cage magnet are made to face each other at the same polarity so that a repulsive force acts between the two magnets. May be arranged so that the two magnets attract each other so that the latch pivots in a direction to be disengaged from the lock fitting. In this case, one of the magnets may be replaced with a magnetic material such as iron.

The means for holding the latch in a state of being hooked on the fastener is not limited to the above-mentioned method using a torsion coil spring, but employs a method of attracting the latch and the fastener using a magnet. Is also good.

[0020]

As described above, according to the door lock device of the present invention, in the state where the cage is located on the rear surface of the opening / closing door, a magnet and a magnet or a magnetic body are opposed to one of the latch and the cage and the other to the other. Due to the repulsive or attractive force acting between these magnets or between the magnets and the magnetic body, the latch comes off the stopper without contacting the cage when the cage comes to the rear of the door, and it opens and closes. Since the door was unlocked,
The generation of harsh sounds due to contact with the latch when the cage moves up and down can be eliminated.

Further, since there is no need to finely adjust the mounting position of each component so as to reduce the contact sound, each component can be easily mounted.

[Brief description of the drawings]

FIG. 1 is a front view of an opening / closing door of an elevating device to which a door lock device according to an embodiment is attached.

FIG. 2 is an external perspective view of the door lock device according to the embodiment.

FIG. 3 is a cross-sectional view of the door lock device of FIG. 2;

FIG. 4 is a front view showing the operation of the door lock device of FIG. 2;

FIG. 5 is an external perspective view of a conventional door lock device.

FIG. 6 is a cross-sectional view of the door lock device of FIG. 5;

FIG. 7 is a front view showing the operation of the door lock device of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening-and-closing door 1a Upper door 1b Lower door 1c Door roller 1d Wire 2 Lock fitting 2a Attachment part 2b Receiving part 3 Rail 4 Latch 4a Projection part 4b Hole 5 Three-sided frame 6 Shaft pin 7 Magnet 8 Stopper pin 9 Spring 10 Tube member 11 Cage 12 Front door 13 Rail 14 Mounting plate 15 Magnet

Claims (1)

[Claims] 1. A lifting device comprising a cage for raising and lowering in a building, and a door for covering an entrance in and out of the building for loading and unloading an object into and out of the cage. Door lock device that locks
The latch is attached to a building, the stopper is attached to an opening / closing door, and means for holding the latch hung on the stopper is provided.When the cage is on the rear surface of the opening / closing door, one of the latch and the cage is provided. The cage came to the rear surface of the door by a repulsive force or an attractive force acting between these magnets or between the magnet and the magnetic material. A lock device for a door for a lifting device, wherein the latch is sometimes detached from a stopper.