JPS6222915B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator door device, and more particularly to an engagement device for engaging a car door and a landing door.

1 and 2 show a conventional elevator door device. In the figures, 1 is an elevator car, 2 is an entrance provided on one side of the car 1, and 3 is an entrance on the top of the car 1. installed drive machine,
4 is a distance piece 4 near the top of the entrance 2.
A door rail is appropriately fixed via a, and 5 is a hanging wheel 5a, 5a guided and supported by this door rail 4.
A door hanger 6 is suspended at its upper end by the door hanger 5, and its lower end consists of a sliding door that opens and closes the doorway 2 guided by a groove provided in the floor (not shown) of the car 1. One end of the car door 7 is connected to the drive machine 3, and the other end is connected to the car door 6.
8 is an engagement device attached to the door hanger 5;
~8e, 8j ~8i, 8n, 8r, 8t and 8
It consists of t ₁ . That is, 8a is a fixed plate consisting of a long column with an L-shaped cross section, one side of which stands upright against the car door 6, and the other side of which extends in the direction in which the car door 6 is fully closed. It is fixed to the door hanger 5 via the piece 8b. 8c and 8d are shafts installed on the door hanger 5 side surface of the fixed plate 8a, 8e is an actuating piece made of a band-shaped member and pivotally connected to the fixed plate 8a via the shaft 8c, and 8j is an actuating piece. A roller 8k is pivotally connected to the fully closed end of the roller 8e, and a connecting piece 8k is a band-shaped member, and a connecting piece 8 is pivotally connected to the fixed plate 8a via a shaft 8d.
n is a movable plate consisting of a long column with an L-shaped cross section, and is provided on the fully open side of the car door 6 with respect to the fixed plate 8a, with one side standing upright to the side of the car door 6, and the fixed plate 8 They are parallel to each other with a gap between them,
The other side extends in the direction in which the car door 6 is fully opened, and the upper part is pivoted to the operating piece 8e and the lower part is pivoted to the connecting piece 8k so that the operating piece 8e and the connecting piece 8k are parallel to each other. It is worn. 8r has one end locked to the end of the movable plate 8n side of the operating piece 8e,
The fixing plate 8a is a biasing body made of a coil spring whose other end is latched to the door hanger 5 and stretched.
This acts to always narrow the gap formed by the movable plate 8n and the movable plate 8n. 8t is a cam fixed to the car 1, and from when the car door 6 is closed to the position immediately before fully closed, even after the car door 6 is fully closed, the lower surface _8t1 continuously pushes the roller 8j against the urging member 8r. It is arranged so that it can be pushed down. Reference numeral 9 denotes an engaged body that is fixed to the landing door 9a and inserted between the fixed plate 8a and the movable plate 8n of the engagement device 8.

In the elevator door device configured as described above, when the car door 6 is fully closed, the roller 8j is pressed down by the cam 8t, and the movable plate 8n is pushed down by the biasing member 8.
It is in a raised position against the urging force of r. Therefore, the distance between the fixed plate 8a and the movable plate 8n is widened, and a gap is formed between the fixed plate 8a and the movable plate 8n. Therefore, the engagement device 8 provided on the car door 6 and the landing door 9
The engaged body 9 provided at a is not engaged.

Next, when opening the car door 6, the car door 6 is opened by the driver 3, and when the roller 8j separates from the cam 8t, the actuating piece 8e moves against the shaft 8c due to the urging force of the urging member 8r. In the center, there is also a connecting piece 8k
are rotated counterclockwise in FIG. 1, respectively, about the axis 8d.

As a result, the engaged body 9 is held between the fixed plate 8a and the movable plate 8n. The car door 6 and the landing door 9 are connected through the engagement between the engagement device 8 and the engaged body 9.
a is engaged. In this state, the car door 6 and the landing door 9a (hereinafter referred to as the car door 6, etc.) are opened. Even after the car door 6 is fully opened, the engagement between the car door 6 and the landing door 9a is maintained.

Next, when the fully opened car door 6 etc. is to be closed, when the drive unit 3 is rotated counterclockwise in FIG. 1, the car door 6 is driven in the closing direction via the drive arm 7, and The door 9a also engages with the car door 6 and closes. When the roller 8j is closed just before fully closed,
engages with the lower surface _8t1 of the cam 8t, the operating piece 8e rotates clockwise in FIG. The distance between the movable plate 8a and the movable plate 8n is widened, and the car door 6 and the landing door 9a are disengaged and are fully closed.

However, when the roller 8j engages with the lower surface _8t1 of the cam 8t and is pushed down from just before the car door 6 is fully closed to the fully closed state, the reaction force of the urging force of the urging member 8r is applied to the fixed plate 8a. It takes. And cage door 6
The suspension wheels 5a, 5a suspend the above-mentioned reaction force along with the weight. By the way, the hanging wheels 5a, 5a
Rubber materials are usually used to suppress noise generation, and they deform under heavy loads. In the above embodiment, the fixing plate 8a is attached so as to be biased towards the fully closed side, so a larger load is applied to the suspended wheel 5a on the fully closed side than on the suspended wheel 5a on the fully open side. Therefore, the hanging wheel 5a on the fully closed side is
There were problems in that the lifespan was shortened and the car door 6 was significantly deformed, causing the fully closed side of the car door 6 to drop and tilt.

This invention solves the above-mentioned problems.
A fixed plate, supported oppositely to this fixed plate with a gap,
A roller is pivotally connected to a movable plate that narrows the gap by a biasing body at all times, and this roller engages with a cam and is pushed downward, thereby resisting the biasing body and narrowing the gap. In an elevator door device comprising an engagement device on a car door side or a landing door side that has an actuation piece that displaces a movable plate and widens the gap, the roller of the actuation piece is pushed by the cam to cause the car to move. The life of the hanging wheel is extended by canceling out the reaction force of the biasing body applied to the door side or landing door side and preventing a large load from being applied to the hanging wheel hanging the car door or landing door. It is an object of the present invention to provide an elevator door device which prevents the car door or the landing door from being shortened and which prevents the hanging wheel from being significantly deformed and causing the car door or the landing door to tilt.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

This embodiment is characterized in that the engaging device and the engaged body in the conventional example are the same, and a door load adjustment device for canceling the reaction force is added thereto.

That is, in the figure, 10 is the door hanger 5.
With the door load adjustment device installed on the
It is composed of 0l. That is, 10a
is a shaft installed in the door hanger 5, and is placed slightly more fully closed than the position of the straight line hanging from the shaft 8c. That is, the shaft 10a is provided near the shaft 8c. 10b consists of a dogleg-shaped link with a semicircular tip end 10c, and a roller support part 10d, and a bent part 10e.
It is pivotally connected to the shaft 10a. 10f is a shaft installed at the end of the roller support part 10d, 10g is the shaft 1
0f is a pivotally mounted roller, 10h is a pin implanted in the roller support portion 10d, 10i is a stopper provided on the door hanger 5, 10j is a pin implanted in the door hanger 5, 10k is the pin 10h and the pin A biasing body made of a tension coil spring tensioned between the link 10j and the link 10j constantly applies a biasing force clockwise in FIG. 3 about the shaft 10a to the link 10b. 10l is a cam fixed to the car 1, and just before the car door 6 is fully closed, the roller 8j moves to the cam 8t.
When the car door 6 is slightly on the fully open side than the position where it engages with the roller 10g, the roller 10g is engaged with the car door 6.
It functions to push up and cancel out the reaction force of the biasing body 8r.

In the elevator door device configured as described above, the roller 8j is pushed by the cam 8t to tilt the operating piece 8e almost horizontally. Also, roller 1
0g rides on the cam 10l, rotates the link 10b counterclockwise in FIG.
c is lowered and positioned so as not to interfere with the actuating piece 8e. Therefore, the roller 8j is connected to the hanging wheels 5a, 5
It acts to push a downward, but the roller 10g
acts to lift the hanging wheels 5a, 5a upward, so they cancel each other out, and the load from the car door 6 and its accessories is applied almost equally to the hanging wheels 5a, 5a.

Next, when the car door 6 opens, first the roller 8
j begins to separate from the cam 8t, the actuating piece 8e rotates about the shaft 8c in the direction shown by arrow A in FIG. 3 due to the urging force of the urging member 8r, and the movable plate 8n moves in the direction of the fixed plate 8a. to narrow the gap, and the engaging body 9
When the car door 6 and the landing door 10 engage with each other while holding the roller 8j, the roller 8j completely separates from the cam 8t. Also,
The link 10b follows the actuating piece 8e with a slight delay due to the biasing force of the biasing body 10k, rotates around the shaft 10a as shown by arrow B in FIG.
It stops when it hits 0i, and roller 10g is connected to cam 10l.
move away from That is, as shown in FIG. At this time, the ramming head 10c faces the actuating piece 8e with a slight gap G in between, as shown in FIG. Further, the point where the ramming head 10c faces the actuating piece 8e is the center of the shaft 8c and the roller 8 as shown in FIG.
A straight line m connecting the center of the pivot portion of the shaft 10a and a straight line n connecting the center of the ram 10c from the center of the shaft 10a are arranged so as to make a substantially right angle to each other. below,
It is fully opened in the above state, and even after being fully opened, the above state is maintained. Therefore, when the fully closed car door 6 opens, the roller 10g separates from the cam 10l following the separation of the roller 8j from the cam 8t, and the two begin to open while canceling each other out. After the roller 8j is separated from the cam 8t and the roller 10g is separated from the cam 10l, the reaction force by the biasing body 8r and the biasing body 10k is not applied to the hanging wheels 5a, 5a. Therefore, the load from the car door 6 and its accessories is applied almost equally to the hanging wheels 5a, 5a.

Next, when the fully opened car door 6 closes, it first returns to the fully opened state, that is, as described above.
The state shown in FIG. 4 is maintained until just before fully closing. Immediately before fully closing, first, the roller 10g rides on the cam 10l, rotates the link 10b in the direction shown by arrow D in FIG. 4, and lowers the ram 10c. Following the roller 10g with a slight delay, the roller 8j is pushed by the lower surface _8t1 of the cam 8t and rotates the operating piece 8e in the direction shown by arrow C in FIG. In this way, the car door 6 is fully closed while avoiding interference between the operating piece 8e and the link 10b. That is,
As shown in FIG. 3, it becomes disengaged. Therefore,
Roller 8j and roller 10g until just before fully closing
are apart from the cam 8t and the cam 10l, respectively, so as explained above, the reaction force applied to the biasing body 8r and the biasing body 10k does not act on the suspension wheels 5a, 5a. Further, from just before full closing to full closing, roller 8j and roller 10g engage with cam 8t and cam 10l, respectively, but the reaction forces of biasing body 8r and biasing body 10k cancel each other out, so that suspension wheels 5a, 5a The load from the car door 6 and its biasing material is applied almost uniformly to the car door 6 and its biasing member.

In the above embodiment, the roller 8j and the cam 8t
The biasing body 8
The car door 6 is pushed downward by the reaction force of r, but
Due to the engagement between the roller 10g and the cam 10l, the reaction force of the biasing body 10k acts to push the car door 6 upward, so the respective reaction forces act to cancel each other out. Further, in the above embodiment, the shaft 10a is arranged slightly on the fully closed side with respect to the shaft 8c, but since it is sufficiently close to the mounting width of the hanging wheels 5a, 5a, the above-mentioned biasing member The rotational moments due to the reaction forces of 8r and 10k can be ignored. Therefore, the biasing body 8r and the biasing body 10k
If the urging force of is selected appropriately, the hanging wheels 5a, 5a
Since the load from the car door 6 and its accessories can be applied to each of them almost equally, it is possible to prevent only one of the hanging wheels 5a from wearing out quickly. There is no possibility that only 5a is greatly deformed and the car door 6 is tilted.

In the above embodiment, the movable plate 8n is disposed on the fully open side compared to the fixed plate 8a, but even if it is disposed on the fully closed side, it operates in the same manner as in the above embodiment. .

Further, in the above embodiment, the engaging device 8 is provided on the car door 6 and the engaged object 9 is provided on the landing door 9a, but conversely, the engaging device 8 is provided on the landing door 9a and the engaged object 9 is provided on the landing door 9a.
Even if it is provided in the car door 6, it functions similarly to the above embodiment.

As described above, the present invention includes a movable plate and a roller that are pivotally connected to the fixed plate with a gap therebetween and that constantly narrow the gap by a biasing body, and this roller is connected to the cam. An engaging device including an operating piece that rotates when engaged and pushed downward to displace the movable plate against the urging body and widen the gap is attached to the car door side or the landing door side. In the elevator door device having the above, a roller is pivotally attached to a link rotatably attached to a car door side or a landing door side to which the above-mentioned engagement device is attached, and a biasing body is locked to the above-mentioned link. A door load adjustment device is provided which causes the roller to move downward and further engages a cam with the roller to push the roller upward. It can reduce the force generated pushing down the car door side or the landing door side, reduce the load on the hanging wheel, and equalize it at any time, prolonging the life of the hanging wheel and preventing deformation of the hanging wheel. This has the effect of reducing the inclination of the car door or landing door.

Furthermore, if the engagement between the roller and cam of the door load adjustment device is made to follow the engagement between the roller and cam of the engagement device, the engagement device will exert a downward force toward the car door or the landing door. Following what happens,
Since the door load adjustment device can generate a pushing force, the load on the hanging wheel is reduced and equalized at all times, and the inclination of the car door or landing can be reduced.

Furthermore, by positioning the rotation center of the link of the door load adjustment device on a straight line hanging from the rotation center of the operating piece of the engagement device, a pushing force corresponding to the push-down force by the engagement device is applied to the door load adjustment device. If it were to be generated, it would be possible to prevent rotational moment from being generated on the hanging wheel, and since the above forces would cancel each other out, the hanging wheel would only be subject to the load of the car door or landing door and its accessories. This has the effect of preventing the life of the car from being shortened, and preventing the car door or the landing door from tilting due to deformation of the hanging wheel.

[Brief explanation of the drawing]

1 and 2 show a conventional elevator door device, FIG. 1 is a front view of its essential parts, FIG. 2 is a cross-sectional view of FIG. 1, and FIGS. 3 and 4 are according to the present invention. FIG. 3 is an enlarged view of the main parts of FIG. 1, and FIG.
The figure is a diagram explaining the operation of FIG. 3. In the figure, 6 is a car door, 8 is an engagement device, 8a
is a fixed plate, 8e is an operating piece, 8j is a roller, 8n is a movable plate, 8r is a biasing body, 8t is a cam, 9a is a landing door, 10 is a door load adjustment device, 10b is a link, 1
0g is a roller, 10k is a biasing body, and 10l is a cam. Note that the same numbers in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A car door and a landing door that engage with each other to open and close when the car is located at the entrance of the hoistway, a fixed plate fixed to one of the doors with its longitudinal end oriented in the vertical direction, and this fixed plate and a movable plate that faces each other with a gap in between, and an actuating piece that is pivotally attached to the fixed plate and the movable plate and displaces the movable plate by rotation about the fixed plate to narrow and widen the gap. , a first biasing body that constantly applies rotational force to the actuating piece in the direction of narrowing the gap; a first urging body that is rotatably attached to an extension of the actuating piece on the side opposite to the movable plate and installed at the closed end of the door; a roller that engages with the first cam and is pushed down to rotate the actuating piece against the first biasing body to widen the gap; A link is rotatably attached to the shaft in the vicinity of the pivoting part of the actuating piece, and a link is provided between this link and the door, and a rotating force is always applied in the opposite direction to the rotational force applied to the actuating piece. a second biasing body applied to the link; a second biasing body for the link;
a second roller that is rotatably attached to a biasing body side extension of the door and engages with a second cam installed at the closed end of the door to push up the link against the second biasing body; An elevator door device equipped with a door load adjustment device.