JPH02147591A - Door lock device for elevator - Google Patents

Abstract

PURPOSE:To maintain the surely closed door state by using the repulsive force of a leaf spring for the closing force for a door. CONSTITUTION:Since each position of a roller 14 and a leaf spring 15 is set so that the roller 14 passes through the downward top part of the leaf spring 15 before the contact point of a door switch 10 is turned ON, a closing force is applied until a door 2 is closed perfectly, after the contact point of the door switch 10 is turned ON by the repulsive force of the leaf spring 15. Even if a cage travels in the state where the door is not perfectly closed and only one stage of a hook is meshed with a locking piece, the losing force acts onto the door at all times, and the trouble in which the contact point of the door switch is turned OFF and the cage is suddenly stopped during traveling is prevented perfectly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a door locking device for a private residential elevator, and more particularly to a door locking device provided with a door closing device that operates near the closed end of the door.

[Conventional technology]

BACKGROUND ART As a door lock device for an elevator for a private residence, one in which a locking mechanism and a door switch are not interlocked but operate independently is used.

This type of related device is disclosed in Japanese Patent Laid-Open No. 169488/1988.

[Problem to be solved by the invention]

The above conventional technology has a two-stage notch shape in the hook that engages with the lock piece, so that even if the first landing door is obstructed by dust or the like and cannot be completely closed, the first stage door can be closed as long as it is closed to the position where the contact of the door switch is turned on. The notch locks the elevator and the elevator is ready to run.

However, if the door begins to open due to a passenger inadvertently leaning against the door while the elevator is running in this state, the door will open before the first stage notch of the hook can prevent the lock piece from moving. The switch contacts turn off and the elevator suddenly stops.

Even if you try to open the door, the door is locked by the notch in the first stage of the hook, so it will stop at a position slightly open from the position where the contact of the door switch is turned off, and although there is no major danger, it may cause damage to the elevator while it is running. This was not desirable because it stopped suddenly.

In addition, a metal fitting is installed at the tip of the door stop, and when the door is fully opened, the metal fitting is hooked into the lock hole of the fixed pillar of the door stop, and the door is kept in the fully open state. Even in this case, when the door is closed, the same phenomenon can occur if the bow hanger stops the door just before the metal fitting is hooked into the lock hole.

An object of the present invention is to provide a door lock device that reliably holds a door in a closed state.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a door closing device having a structure in which a roller is pressed against a leaf spring and the repulsive force of the handling spring is used as the closing force of the door.

[Effect]

A leaf spring is installed on the frame that supports the guide rail, and a hanger roller is installed, and the roller is pressed against the leaf spring from a position near the closed end of the door before the contact of the door switch is turned on, and the repulsive force of the leaf spring closes the door. Make sure to apply a force in the closing direction to .

As a result, after the contact of the door switch is turned on, the closing force is always applied to the door until the door is completely closed. This prevents the door from opening due to inadvertence, and the door switch is activated while the car is running. This can prevent problems where the car suddenly stops when turned off.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a perspective view of an entire elevator landing door incorporating an elevator door locking device according to the present invention. 1 is a frame body to which the guide rail 3 of the door 2 is attached.

The upper end of the door 2 is suspended on a guide rail by a guide roller 5 which is pivotally supported by a hanger 4, and the lower end is guided by a sill 6.

Further, a lock piece 8 and a switch cam 9 are fixed to one end of the hanger 4 on the door stop side via a metal fitting 7, and a door switch 10 is arranged on the frame 1, so that the door 2 is closed. In this state, the switch cam 9 turns on the contact of the switch.

Reference numeral 11 denotes a door lock device, and a hook Ilb rotating around a bearing 11a is arranged so that the notch of the hook Ilb and the lock piece 8 engage with each other when the door 2 is closed. The hook llb rotates counterclockwise (locking direction) around the bearing 11a due to its own weight.

Further, on the other side of the hook llb, an unlocking roller lid is provided which is supported by a shaft 11c, and by applying force from the outside, the unlocking roller lid is moved clockwise (in the unlocking direction) around the bearing 11a. ). still,
The car 12 is provided with an unlocking cam 13.
The unlocking roller lid and the unlocking cam 13 are configured to engage with each other when the unlocking roller lid is located near the floor.

14 is a roller provided on the hanger 4; 15 is a leaf spring that is pressed by the roller near the closed end of the door and generates a repulsive force;
installed on. The roller and the leaf spring are positioned relative to each other so as to continuously apply a closing force to the door 2 from before the position where the contact of the door switch 10 is turned on until the door 2 is completely closed.

In addition, the door lock device provided on the 11′ side and the 12 side,
Similarly, 13' is an unlocking cam.

Further, although not shown in the figure, rollers 14' and leaf springs 15' corresponding to the rollers 14 and leaf springs 15 on the riding bath side are similarly provided on the car side.

FIG. 2 is a front view of the door lock system and door closing device shown in FIG. 1, showing a state where the car 12 is stopped on a certain floor and the door 2 is completely closed.

That is, since the unlocking cam 13 pushes the unlocking roller lid of the door locking device 11 clockwise and lifting the hook 11b, the hook 1b has come off the lock piece 8, and the door lock is in the unlocked state. However, the door 2 is fully closed, and the contact point of the door switch 10 is turned on by the switch cam 9, so the door 12 can run.

Next, as the car 12 runs, the unlocking cam 13 moves in the running direction of the heel 12, so the unlocking cam 13 moves along the unlocking roller li.
d, the hook Ilb rotates counterclockwise due to its own weight, and the second stage notch of the hook Ilb engages with the lock piece 8 to become locked. The state is shown in FIG.

Figure 4 shows the door in Figure 2, but for some reason the door 2 does not close completely and the switch cam 9 causes the door switch 1 to close.
This shows the state where the 0 contact is stopped at the 5 degree on position.

Even if the door 2 is not completely closed in FIG. 4, if the contact of the door switch 10 is turned on, the hook Ll
The first notch b and the lock piece 8 are designed to engage with each other.

That is, when closing the door, the lock piece engages with the notch in the (1)-th stage. (2) The door switch contact turns on. (3) The second notch and lock piece engage. It is configured to operate in the above order.

Here, the positions of the roller 14 and the leaf spring 15 are set so that the roller 14 passes the downward peak of the leaf spring 15 before the contact of the door switch 1o is turned on.
Due to the repulsive force 5, a closing force is applied to the door 2 until the door 2 is completely closed, at least after the contact of the door switch 10 is turned on.

According to this embodiment, when closing the door, the closing force is continuously applied to the door from before the contact of the door switch turns on until the door is completely closed. can be closed completely.

In addition, even if the car is running with the door not completely closed and only the first stage of the hook is engaged with the lock piece, the closing force is always applied to the door.
It is possible to completely prevent the problem of the door switch contact turning off and the car suddenly stopping while it is running.

In this embodiment, the landing door has been described, but since a door locking device and a door closing device are similarly provided on the car side, exactly the same effect can be expected for the car door as well.

Further, in this embodiment, the hanger roller and the leaf spring are respectively attached to the frame, but the same effect can be obtained even if the configuration is reversed.

Furthermore, in this embodiment, the hook cutout has two stages. For the functionality of the door lock, it is desirable to have two notches in the hook, but even if the hook has only one notch, it is equally effective in keeping the door closed.

In this embodiment, a leaf spring was used as a means for applying a closing force to the door. In the case of elevators for private residences, there is no provision for automatic closing of entrance/exit doors, and this structure was adopted because the door lock function requires only a limited closing force near the closed end.

The closing device of this embodiment has the advantage of having a simple structure, requiring a small installation space, and being able to be manufactured at low cost.

Even if the car is running with the door not completely closed and only the first stage of the hook is engaged with the lock piece, the closing force is always acting on the door, so the car is still running. The door will not open easily if a passenger carelessly leans on the door, or if the car vibrates, thereby preventing the car from suddenly stopping while it is running.

〔Effect of the invention〕

According to the present invention, in the case of a manual door, the door can be reliably closed at the closed end.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire landing door according to an embodiment of the present invention, Fig. 2 is a front view of the main part of Fig. 1 showing the door in the unlocked state, and Fig. 3 shows the door in the fully locked state. Figure 1 is a front view of the main part, Figure 4 is the front view of the main part, and Figure 4 is the front view of the main part of the door.
It is a front view of the main part of a figure. 2... Door, 4... Hanger, 8... Lock piece, 9 Switch cam, 10... Door switch, 11... Door lock device, llb... Hook, 13... Unlock cam .

Claims (1)

[Claims] 1. A lock piece and a switch cam provided on a door hanger, and a door switch provided on a frame supporting a guide rail of the door and operated by the switch cam when the door is closed. and a door lock device consisting of a hook that rotates around a bearing and engages with the lock piece, wherein a roller pivotally supported on the hanger is attached to the frame so as to apply a closing force to the door near the closing end of the door. A door lock device for an elevator, characterized in that the door lock device is configured to press against a leaf spring provided on the hanger, or conversely to push the leaf spring provided on the hanger against the roller pivotally supported on the frame. 2. The mutual positions of the roller and the leaf spring are determined so as to continuously apply a closing force to the door from before the contact of the door switch is turned on until the door is completely closed. The elevator door lock device according to scope 1. 3. When the notch shape of the hook is made into two stages and the door is closed, first, the first stage notch of the hook and the lock piece are engaged, the contact of the door switch is turned on, and finally the hook is closed. 3. The elevator door lock device according to claim 2, wherein the positions of the second stage notch and the lock piece are determined so that the lock piece engages with the second stage notch.