JPS5819254Y2 - Automatic door closing device for elevator doors - Google Patents

Description

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

Elevator landing door systems are generally equipped with automatic door-closing devices, and in the unlikely event that the door is left open on a floor where there is no elevator car, a passenger falls into the hoistway. or when a building fires, smoke enters the hoistway,
This prevents accidents such as the spread of fire to other floors.

Such a conventional automatic door closing device will be explained with reference to FIG.

In the figure, 1 is a wall of the hoistway, 2 is a hanger case fixed to the wall 1 of the hoistway, 3 is a rail fixed to the hanger case 2, 4 is a door, and the upper part is connected to the rail 3 via a hanging wheel 5. The upper end is guided, and the lower end is guided by a lever 6 fixed to the hoistway to open and close the access lower.

Reference numeral 8 denotes a guide body fixed to the door 4, which is made of a channel steel member with a lip and whose longitudinal axis is arranged in the height direction of the door 4.

9 is a pulley pivotally attached to the upper edge of the door 4, 10 is a rust stopper fixed to the hanger case 2, and 11 is a weight disposed in the groove of the guide body 8 and slidably engaged therewith. The weight 12 is a rope whose both ends are connected to the rust stopper 10 and the weight 11, respectively, and whose middle part is wound around the pulley 9.

Now, when the door 4 is opened, the weight 11 is guided by the guide body 8 and moves upward.

Therefore, when the door 4 is in the closed state, the door 4 is always urged in the door closing direction by the force of the weight 11 trying to fall.

This ensures that the elevator car (
Even if door 4 opens on a floor where there is no person (not shown), door 4 will be securely opened.
The system is fully closed to prevent accidents such as passengers falling into the hoistway or the spread of fire in the event of a fire.

However, the door 4 is generally electrically opened and closed by a drive device (not shown) provided in the elevator car via a locking device (not shown).

Therefore, in addition to vertical movement, the weight 11 receives forces in the lateral direction due to acceleration and deceleration when the door 4 is opened, closed, and reversed.

For this reason, there is a drawback that the weight 11 comes into contact with the guide body 8 and a sliding sound or a collision sound is generated.

This invention solves the above-mentioned drawbacks and aims to provide an automatic elevator door closing device that generates less operating noise.

An embodiment of this invention will be described below with reference to FIGS. 1 to 3.

In Figures 2 and 3, the same symbols as in Figure 1 indicate the same parts,
Guide elements 13 are fixed to the upper and lower parts of the weight 11 and are arranged to protrude from the outer surface of the weight 11, and are made of a non-metallic elastic material such as rubber.

A sliding piece 13a is attached to a portion of the guide 13 facing the guide body 8, and is made of a wear-resistant nonmetallic material with a small coefficient of friction, such as tetrafluoroethylene resin.

That is, the mounting part of the guide 13 is made of a soft material such as rubber, and the sliding part is provided with a wear-resistant sliding piece 13a having a small coefficient of friction, which is pasted or molded at the same time. Not only the sliding noise when the guide body 4 is opened and closed, but also the collision noise with the guide body 8 is eliminated even in response to strong lateral acceleration/deceleration during reversal.

Furthermore, a wear-resistant sliding piece 13 a with a small coefficient of friction
As the weight 11 moves up and down when the door 4 is opened and closed, there is no stick-slip or friction noise caused by friction when the weight 11 moves up and down, and it moves up and down inside the guide body 8 silently, allowing automatic door closing with less noise. A device is obtained.

Further, since the end face of the guide 13 is formed into an arc shape as shown in FIG. 3, it is possible to easily know when to replace the guide 13 by measuring the wear width of the sliding piece 13a.

Therefore, when the guide element 13 is exposed due to wear of the sliding piece 13a, the time to replace the guide element 13 is determined based on the occurrence of problems such as the vertical movement of the weight 11 or the generation of friction noise. It is possible to avoid such situations and maintain a quiet operating state.

Furthermore, since the end face of the guide 13 is formed into an arc shape,
By tilting the weight 11, the corner of the guide 13 is moved to the guide body 8.
There is no possibility that the sliding piece 13a will be caught inside and peeled off.

As explained above, this invention uses a guide made of non-metallic elastic material as a weight that engages with the door, moves horizontally with the door, and moves up and down guided by a guide provided on the door to automatically close the door. and a sliding piece made of a non-metallic material made of a low-friction and wear-resistant material that is attached to this and placed in a part facing the guide body, and the weight is guided through the guide piece and the sliding piece. So,
An automatic door closing device for elevator doors that generates less noise due to collisions caused by the sliding of the weight and the guide and the shaking of the weight due to the door opening/closing operation, and which can easily maintain smooth operating conditions over a long period of time. This is to realize the following.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of an elevator door device showing an automatic door closing device for an elevator door, and Fig. 2 is a line II-II in Fig. 1 showing an embodiment of the automatic door closing device for an elevator door according to this invention. Cross-sectional view, Figure 3 is III of Figure 2
-III line cross-sectional view. 4...Door, 8...Guide, 11...
... Weight, 13... Guide, 13a...
...Sliding piece. 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 that is engaged with and suspended from the door, moves horizontally with the door, and is guided by a guide provided on the door to move up and down as the door opens and closes, automatically closing the door. A guide element made of a non-metallic elastic material attached to the weight, and a slide made of a non-metallic material made of a low friction and wear-resistant material and attached to a portion of the guide element facing the guide body. 1. An automatic door closing device for an elevator door, comprising a moving piece, and guiding the lifting and lowering of the weight via the guide element and the sliding piece.