JPS5813476B2 - Elevator door overload detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overload detection device for an elevator door.

First, the conventional elevator door overload detection device was
-Explained with reference to FIG.

In the figure, 1 is the elevator car, 2 is the entrance/exit of this, and 3
is the first sliding door consisting of a cage door provided at entrance 2;
4 is a drive device for the door, 5 is a link device connection body of the drive device 4 whose one end is pivotally connected to the first sliding door 3, 6 is also a link of the link device, and 7 is a part of this and has an opening at one end. A first cylindrical recess 7a and a protrusion 7b provided at the open end thereof.
The link body 8 is the other part of the link 6 and has a recess 1a in a part.
A second link body is provided with a fitting part 8a that is loosely fitted in the second link body, and a protrusion part 8b that is provided on the other part and protrudes along the fitting part 8a and is arranged away from the protrusion 7b. 8
C is a V-shaped recess formed in the fitting part 8a, 8d is a side wall formed on both sides of the opening edge, and 9 is a retainer provided through the first link body 7. With the tool, spring 9a
A roller 9b is provided which is pressed against the V-shaped tip of the recess 8c.

Reference numeral 10 indicates a door closing abnormality detecting device, which is a switch that is attached to the second link body 8 and whose actuating portion is in contact with the protrusion 7b. Numeral 11 is a door closing abnormality detection device that is attached to the second link body 8 and whose actuating portion is in contact with the protrusion 1b. A door open abnormality detection device is brought into contact with the side opposite to the contact side of the closing abnormality detection device 10, and 12 is a well-known engaging element attached to the first sliding door 3, and is connected to the second sliding door (located in the elevator landing). (not shown) when necessary.

That is, the first sliding door 3 and the second sliding door are opened and closed by the drive device 4 via the link device in an engaged state.

At this time, the link 6 may be affected by the driving resistance force during the normal opening/closing operation of the first and second sliding doors, that is, the inertial resistance force of the door that mainly occurs during acceleration and deceleration of the first and second sliding doors.
, a holder 9 to prevent relative displacement of the second link bodies 7 and 8.
held by.

When the first and second sliding doors open and close, if at least one of these doors is subjected to an overload such as colliding with a passenger, the first and second link members will move against the holding force of the holder 9. 7 and 8 are relatively displaced.

At this time, either the door closing/opening abnormality detecting device 10 or 11 operates to appropriately control the drive device 4.

It is desirable that the overload to operate such door closing abnormality detection device 10 etc. is small from the viewpoint of safety for passengers, etc., but it is desirable that the overload is small as is obvious from the viewpoint of safety of passengers etc. Now, if the holding force of the holder 6 is set so that the first and second link bodies 7 and 8 do not undergo relative displacement, the overload when the door closing abnormality detection device 10 etc. operates is normally 10 k.
It will be about g.

For this reason, for example, there is a problem in that passengers who come into contact with the first and second sliding doors during the closing operation feel uneasy.

The present invention aims to solve the above-mentioned drawbacks and provides an overload detection device for an elevator door that operates with a small overload when the opening/closing operation of the sliding door is obstructed.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.

In the figure, the same reference numerals as in FIGS. 1 to 3 indicate corresponding parts, and 8 is a displacement body whose longitudinal middle part is pivotally attached to the first sliding door 3, and 8c
10 is a V-shaped recess provided at the lower end of 4, and 10 is a recess 8.
10a is a normally closed contact, 10b is a normally open contact, and 12 is a switch near the upper end of the displacement body 8. The attached engager 5 is a connecting body of a link device whose one end is pivotally connected to the displacement body 8 , and is arranged between the pivot portion of the displacement body 8 and the engager 12 .

Blocking pieces 14 are arranged on both sides of the upper end of the displacement body 8 and fixed to the first sliding door 3, and prevent rotation of the displacement body 8 within a predetermined range.

15 is a door opening/closing command device, 16 is a reversing command device for reversing the first sliding door 3, etc. during the opening/closing operation, and 17 is a reversing command device that operates at a position immediately before the first sliding door 3, etc. is fully closed, and this operation is maintained fully closed. 13 is the normally closed contact of this switch, and (1) and (d) are the power supply.

It is now assumed that the first sliding door 3 and the second sliding door are fully opened in an engaged state.

When a door closing command is issued from the door opening/closing command device 15 in this state, the detection device 10 does not operate, and the drive device 4 is energized, and the first sliding door 3 etc. operate to close.

The normal drive resistance force of the first sliding door 3 during the door closing operation acts on the pivot portion of the displacement body 8, and that of the second sliding door acts on the engaging member 12.

On the other hand, since the connecting body 5 is provided between the engaging element 12 and the pivoting part of the displacement body 8, the driving resistance forces of the first sliding door 3 and the second sliding door are canceled out, and the displacement body is rotated by these. Power becomes smaller.

Therefore, even if the holding force of the holder 9 is small, the displacement body 8 can be held at a predetermined position against the normal drive resistance force of the first sliding door 3 and the like.

Therefore, when an overload is applied to the door closing operation, such as when at least one of the first sliding door 3 and the second sliding door collides with a passenger, the small overload weight causes the displacement body 8 to move against the holding force of the holder 9. rotates, and the roller 9b is pressed by the recess 8c.

As a result, the detection device 10 operates and the contact 10a is opened, so that the driving device 4 is deenergized.
Since b is closed, (+)-10b-18-16-4-
The reversal command device 16 is energized by the (-) circuit.

The first sliding door 3 in which the drive device 4 is reversely biased by this
etc. is reversed and the door is opened.

Further, assuming that no abnormality occurs during the door closing operation and the first sliding door 3 etc. reaches the position just before fully closing, the engaging element 12 and the engaging plate 1
3 is disengaged, the drive resistance force of the second sliding door no longer acts on the displacement body 8, which rotates and the detection device 10 operates.

However, at this time, since the contact 18 is open, the reversal command device 16 is not energized, and since the contact 11 is closed, the (+)-15-17-4-(d) circuit As a result, the drive device 4 continues to be energized, and the first sliding door 3 and the like are driven to the fully closed position.

In short, since the driving resistance forces of the first sliding door 3 and the second sliding door cancel each other out, the overload for operating the detection device 10 can be reduced to a fraction of that in the case of the devices shown in FIGS. 1 to 3.
The operating load of the detection device 10 can be reduced.

Thereby, it is possible to eliminate the feeling of anxiety among passengers when the overload detection device is activated.

Furthermore, if an overload is applied when the first sliding door 3 is opened, the detection device 10 operates in the same way as when the door is closed, but the reason for this operation is that the passenger's hand is caught between the sliding door and the edge of the doorway. Since the operating load of the detection device 10 is small in the event that the overload detection device 10 is jammed, the sliding door will be reversed as soon as the sliding door is caught in the hand. Therefore, an overload detection device with excellent safety can be obtained.

In the embodiments shown in FIGS. 4 to 6, the distance l1 from the pivot point of the coupling body 5 to the displacement body 8 to the pivot point of the displacement body 8 itself and the distance l1 from the pivot point of the coupling body 5 to the engagement member 12 distance l2 to the driving resistance force of the first sliding door 3 and the second sliding door,
In other words, if you set it to the inverse ratio of the weight of each sliding door,
The operating load of the detection device 10 can be minimized.

However, it is practical to set the distances AI and l2 so that the detection device 10 does not operate due to the difference in weight and frictional resistance between the second sliding doors on each floor of the elevator, and to set the holding force of the holder 9 slightly larger. It is.

As explained above, the present invention operates the detection device via a displacement body that acts so that the drive resistance forces of the first and second sliding doors cancel each other out, thereby reducing the operating load of the first and second sliding doors. This makes it possible to detect even a small overload when at least one of the two sliding doors is opened/closed.

As a result, it is possible to realize an overload detection device for an elevator door that does not give passengers a feeling of anxiety during operation and is highly safe.

[Brief explanation of the drawing]

Fig. 1 is a conceptual front view of an elevator corner showing a conventional elevator door overload detection device, Fig. 2 is an enlarged view of the ■ part in Fig. 1, and Fig. 3 is an enlarged sectional view of the - part in Fig. 2. FIG. 4 is a diagram corresponding to FIG. 1 showing an embodiment of the elevator door overload detection device according to the present invention, FIG. 5 is a cross-sectional view taken along the line FIG. 3...First sliding door, 4...Drive device, 5...Connection body, 8
... Displacement body, 9 ... Holder, 10 ... Detection device, 12 ...
...Engagement element, 13...Engagement plate of second sliding door. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1 a first sliding door that engages with the second sliding door when facing the second sliding door in an overlapping state and is driven by a drive device;
a displacement body whose intermediate portion is pivotally attached to the first sliding door; a detection device that normally holds the displacement body in a predetermined position and operates when the displacement body is displaced against the holding force; an engaging element attached to one side of the displacement body and engaged with the second sliding door; and a coupling body of the drive device connected to the displacement body, the pivot portion of the displacement body and the engagement element being connected to each other. An overload detection device for an elevator door, comprising the above-mentioned connector disposed between the mounting portion and the mounting portion.