JPS638692Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a device for opening and closing elevator car doors.

A car door is provided at the elevator car entrance. A device in which the car door is driven by a strip such as a rope, chain, or belt is used, as shown in, for example, Japanese Utility Model Publication No. 49-6927. This is shown in FIG.

In the figure, 1 is an elevator car room, 1a is an entrance provided in the car room 1, 2 is a car door provided opposite the entrance 1a, 3 is a hanging device fixed to the upper part of the car door 2, and 4 is a hanging device. A roller attached to a hanging device 3, 5 a support stand fixed to the car compartment 1 above the entrance 1a, 6 a door rail fixed to the support 5 and guiding the roller 4 in the horizontal direction, 7 below the entrance 1a a sill installed in the cage door 2 to guide the lower part of the cage door 2;
Reference numeral 8 denotes a drive machine including an electric motor and a speed reducer installed on the support base 5, 9 a pulley mounted on the support base 5 and driven by the drive machine 8, 10 a pulley fixed to the pulley 9, and 11 a support base 5. A pulley 12 mounted on the pulley 10 and facing the pulley 10 is a strip of rope that is endlessly wound around the pulleys 10 and 11 and a part of which is connected to the hanging tool 3.

That is, the figure shows a state in which the car door 2 closes the entrance 1a. When the drive machine 8 rotates in this state, the strip 12 moves via the pulleys 9 and 10 and pulls the hanging tool 3 coupled thereto in the horizontal direction. The roller 4 now rolls on the door rail 6, and the car door 2 is driven in the door opening direction. When the door is closed from an open state, the above is reversed.

However, while the cab 1 is running (the state shown in Figure 2),
If the strip 12 were to break, the force to restrain the door would be lost. Therefore, if a passenger were to force open the car door 2, the car door 2 would open easily and there is a risk that the passenger would fall into the hoistway.

This invention improves the above-mentioned problem by engaging the movable key with the strip that drives the car door, and making the movable key face the fixed key when the car door is closed. To provide an elevator door opening/closing device which locks a car door when a strip is broken by urging it in the direction of engagement, thereby ensuring the safety of passengers.

An embodiment of this invention will be described below with reference to FIG.

In the figure, 14 is a fixed hook that is fixed to the hanging tool 3 at one end and has a pawl formed on the other end, and 15 is a fixed hook formed in an L-shape, the middle portion of which is pivoted to the support base 5, and a pawl formed at the tip of one side. The other side is a movable key that extends upward;
Reference numeral 16 denotes a biasing body made of a compression spring provided between one side of the movable lock 15 and the support base 5, and 17 a pulley attached to the tip of the other side of the movable lock 15 and around which the rope 12 is wound. Other than the above, the configuration is the same as in FIG. 1.

That is, since the biasing body 16 applies a force to the movable lock 15 in the clockwise direction in FIG. 2, the pulley 17 is biased to the right and applies tension to the strip 12. In this state, the movable lock 15 and the fixed lock 14 are adjusted so as to maintain a sufficiently disengaged state. Therefore, the operation of the car door 2 is exactly the same as that shown in FIG.

When the strip 12 breaks while the car compartment 1 is running, the movable lock 15 rotates clockwise by the force of the biasing member 16, and the movable lock 15 engages with the fixed lock 14. The car door 2 is now locked, so even if a passenger tries to pry the car door 2 open, the car door 2 will not open.

Since the strip 12 is pulled by the biasing body 16, changes in tension due to elongation of the strip 12 are absorbed, and the tension is always kept substantially constant. In addition, this tension is larger than the normal door opening/closing force or the tension applied to the strip body 12 when the door is reversed, so that the shaking of the car door 2 due to the deflection of the biasing body 16 is prevented when the door is opened/closed and when the door is reversed. It won't happen.

FIG. 3 shows another embodiment of this invention.

In this example, the pulley 11 is similar to that in FIG. 1, and the locking hook 14 is fixed to the support base 5. On the other hand, the movable hook 15 is pivotally connected to the hanging tool 3, and its intermediate portion extends upward, and a roller 18 is attached to the tip of the movable hook 15.
is installed. Then, due to the biasing body 16 provided between the hanging tools 3, the roller 18 is moved to the strip 12.
is pressed to the bottom. Other than the above, it is the same as in FIG. 2. The constantly movable lock 15 is pressed against the force of the biasing body 16 via the roller 18, and is adjusted so as to maintain a sufficiently disengaged state with the fixed lock 14. Therefore, the operation of car 2 is similar to that in FIG.

When the strip 12 is broken while the car 1 is running, the movable lock 15 is rotated counterclockwise in FIG. 3 by the force of the biasing member 16 and engages with the fixed lock 14.

The tension adjustment action of the strip 12 by the biasing body 16 is the same as in the case of FIG. 2.

It is clear that the strip 12 in each of the above embodiments is not limited to a rope, but may also be a chain, a belt, or the like.

As explained above, in this invention, the car door suspended by the upper rolling element is connected to a strip stretched on a fixed part, and the car door is opened and closed by driving this strip. In a door opening/closing device, there is a fixed key provided on a fixed part or a car door, and if this fixed key is provided on a fixed part, it is pivoted to the car door and faces the fixed key when the car door is closed. and is disposed in a state in which it engages with the strip and is disengaged from the fixed key, and if the fixed key is provided on the car door, it is pivoted to the fixed part and pivots the pulley with the strip wrapped around one side. a movable key on the other side facing the fixed key and disposed in a non-engaging state with the fixed key by means of a strip when the car door is closed;
Since the movable lock is provided with a biasing body that biases the movable key in the direction of engagement with the fixed key, the car door can be locked even if the strip is broken while the car is running.
Passenger safety can be ensured by preventing passengers from forcing open the car door.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional elevator door opening/closing device, Fig. 2 is a front view showing an embodiment of the elevator door opening/closing device according to this invention, and Fig. 3 shows another embodiment of this invention. It is a front view. 2... Car door, 8... Drive machine, 12... Strip body,
14...Fixed key, 15...Movable key, 16...
Biasing body, 17...pulley, and the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A car door whose upper part is suspended by a rolling element is connected to a strip stretched over a fixed part, and the cage door is opened and closed by driving this strip. In the elevator door opening/closing device according to the present invention, if the fixed key is provided on the fixed part or the car door, and if the fixed key is provided on the fixed part, it will be pivoted to the car door and the car door will close. is arranged in a state where it faces the fixed key and engages with the strip and is disengaged from the fixed key, and if the fixed key is provided on the car door, it is pivoted to the fixed part. and the pulley around which the strip is wound is pivoted on one side, and the other side faces the fixing key with the car door closed and disengages with the fixing key by the strip. An elevator door opening/closing device comprising: a movable key; and a biasing body provided on the movable key to bias the movable key in a direction into which the movable key engages with the fixed key. (2) The elevator according to claim 1 of the utility model registration claim, characterized in that the tension applied to the strip by the biasing body is greater than the tension applied to the strip when the car door is normally opened, closed, or reversed. door opener.