JPS5820767Y2 - Automatic elevator door closing device - Google Patents

Description

[Detailed description of the invention] This invention relates to an automatic door closing device for an elevator door.

In general electric elevator doors, doors are provided at the landing entrance and car entrance, and a drive device installed on the car drives the car door, and at the same time, an engagement device installed on the car door drives the car door. Grasp the provided engager,
The car door and the landing door are designed to open and close in unison.

This landing door is normally closed by power via a car door and is further electrically and mechanically locked.

However, if the landing door is left open for some reason on a floor with no elevator door, there is a risk that people or objects may fall into the elevator hoistway.

In order to prevent this, an automatic door closing device is installed on the landing door, and in the event that only the landing door opens, the door closing force will be applied immediately with the switch fully closed 1 to fully close the landing door. It has become.

However, because automatic door closing devices have a simple structure and reliable operation, many of them use the gravity of a weight to act through a rope, and in such devices, when the rope wears out and breaks, the weight Accidents may occur in which the elevator falls into the hoistway, damaging the elevator equipment, or colliding with the car, causing damage to passengers.

This invention solves the above-mentioned drawbacks and aims to provide an automatic elevator door closing device that prevents accidents caused by abnormal lowering of the weight due to breakage of the rope suspending the weight.

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a wall of the elevator hoistway, 2 is a hanger case fixed to the wall 1, 3 is a rail fixed to the hanger case 2, and 4 is a landing door consisting of a sliding door. The lower part is guided to a sill 6 fixed to the wall 1 of the hoistway to open and close the entrance/exit lower of the landing.

The left and right landing doors 4 in FIG. 1 are connected by an interlocking device (not shown) so that they open and close in opposite directions.

Reference numeral 8 indicates a rope stop fixed to the hanging wheel 5, 9 indicates a pulley rotatably supported on the above-mentioned case 2, and 10 indicates a door 4 between the above-mentioned case 2 and the threshold 6. A channel steel member with a lip disposed along the longitudinal direction of the guide, which has an opening 11 along the longitudinal direction on its front surface.
is provided.

12 is a cylindrical weight that is placed in the groove of the guide 10 and moves up and down in the vertical direction; 13 is a square shoe fixed to the upper and lower parts of the weight 12, and is made of a non-metallic material such as rubber or canvas; , is slidably engaged with the groove of the guide 10.

Reference numeral 14 denotes a rope whose both ends are connected to the rope stopper 8 and the weight 12, respectively, and whose middle part is wound around the pulley 9;
is a blocking body consisting of the end of the sill 6 projecting directly below the guide 10.

Now, if for some reason the landing door 4 is opened on a floor where there is no elevator (not shown), the weight 12
rises within the guide 10.

As a result, the weight 12 uses its own weight to urge the landing door 4 in the direction of closing the door via the rope 14, thereby forming an automatic door closing device for the landing door 4.

Since the dimension A between the lower end of the guide 10 and the blocking body 15 is smaller than the total length of the weight 12, the
Even if the weight 14 breaks, the weight 12 will not be pulled out from the guide 10 when the weight 12 hits the blocking body 15.

Therefore, the weight 12 does not fall into the hoistway and damage elevator equipment installed in the hoistway, or collide with the car and cause harm to passengers inside the car.

Therefore, an automatic door closing device with high safety can be obtained.

Figure 3 shows another embodiment of this invention.
．． The same reference numerals as the second one indicate corresponding parts, 16 is a metal fitting connecting the end of the sill 6 and the lower end of the guide 10, 15 is a metal fitting 16
A blocking body consisting of a bolt screwed into the guide 10 and twisted and protruding onto the lifting path of the weight 12, which is located below the position of the weight 12 when the door 4 is fully closed, that is, the predetermined lowering position of the weight 120. ing.

That is, in this embodiment as well, when the weight 12 descends excessively beyond a predetermined position due to breakage of the rope 14 or the like, it collides with the blocking body 15 and stops.

In this state, the weight 12 is held by the guide 10.

Therefore, although a detailed explanation will be omitted, in this embodiment as well, the first. It is clear that the same effect as the embodiment of FIG. 2 can be obtained.

FIG. 4 also shows another embodiment of this invention, in which the same reference numerals as in FIG. This is a blocking body made of a plate, 15a is a through hole provided in the center of this, 17 is a switch attached to an arm 18 protruding from the metal fitting 16, and 17a is an actuating part of this, which is inserted into the through hole 15a. It is loosely fitted and is arranged to protrude above the blocking body 15.

That is, this embodiment is also provided with a blocking body 15 similar to the embodiment of FIG. 3, and it is clear that the same effect as that of FIG. 3 can be obtained.

Incidentally, in this embodiment, the following effects can be obtained.

That is, when the weight 12 descends excessively, it hits the blocking body 15 and at the same time presses the actuating part 17a to activate the switch 17.
make it work.

Therefore, through this operation, the elevator can be stopped,
An elevator management device (not shown) can be operated to notify abnormalities in the weights 12, thereby making it possible to prevent secondary accidents due to abnormalities in the weights 12.

As explained above, in this invention, when a weight suspended by a rope and placed in the hoistway descends excessively, a blocking body is provided to prevent the weight from descending at a position where the weight does not come off from the guide. The object of the present invention is to realize a highly safe automatic elevator door closing device that prevents accidents caused by weights falling into the elevator hoistway due to such abnormalities.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of an automatic elevator door closing device according to this invention, Fig. 2 is a sectional view taken along the line ■-■ of Fig. 1, and Figs. 3 and 4 are respectively an elevator door according to the invention. FIG. 2 is a diagram showing another embodiment of the automatic door closing device of FIG. 1... Hoistway wall, 4... Door, γ...
...Entrance/exit, 9...Pulley, 10...
・Guide, 12... Weight, 14...
Rope, 15... Blocker. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A weight provided at the edge of an elevator entrance and exit, located in the hoistway of the elevator, and placed on the side of a door 0, which is a sliding door that opens and closes the entrance; A guide that is engaged to be able to be raised and lowered, and a rope that is wound around a pulley placed at a position corresponding to the upper end of this guide and whose both ends are connected to the weight and the door, respectively, are provided. In a case where the door is biased in the closing direction,
The weight, which is provided below a predetermined lowering position of the weight and has fallen excessively, is provided with a blocking body that collides with the weight, and the engagement between the weight that has fallen excessively and the guide is maintained through the blocking body. An automatic elevator door closing device featuring: