JPH1045360A - Interlock device for car door of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a user shut up in a car from falling from the car by positioning a second lever in a second position by being guided by a guide plate, engaging an engaging part with an engaging object part, and checking opening operation of a car door when the car is landed on a floor between respective landing elevator halls. SOLUTION: When a car door is moved in the opening direction, a hanger 20 also moves in the same direction. At this time, a guide plate 21 installed on the hanger 20 also moves in the same direction, and a small roller 19 of an end part of a second lever 16c is energized by a spring 22, and moves to a second position 21b from a first position 21a while being pressed by the guide plate 21. The lever turns in the anticlockwise direction with a shaft 17 as the center, and when the small roller 19 reaches the second position 21b, an engaging part 16e engages with an engaging object part 20a. Therefore, in the case where a car stops between a landing elevator hall and a landing elevator hall in a hoistway, when a user tries to open the car door by himself, the engaging part 16e engages with the engaging object part 20a, and opening operation of the car door more than that is checked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car door interlock device which is a safety device for preventing an elevator car door from being opened at a place other than a stop floor.

[0002]

2. Description of the Related Art FIG. 7 shows a side view of a conventional elevator. In the figure, 1 is an elevator hoistway, 2a is a landing of an elevator vertically adjacent, 3 is a landing 2, 2a
, 3a is a landing door provided at the entrance 3, 4 is a car that moves in the hoistway 1, 5 is a car door for entering and exiting the car 4, and the car door 5 is fixed to the upper edge. The hanger 6 is suspended on a hanger rail (not shown) close to the entrance of the car 4 in the width direction of the entrance,
The door of the car 4 is opened and closed by being guided by the hanger rail. 7 is an electric driving device for driving the car 4, 8 is a hanging weight for hanging the car 4, 9 is a main rope which is hung over the driving device 7 and connects the car 4 to the hanging weight 8. Reference numeral 10 denotes a control box for controlling the operation of the car 4, 11 denotes a control cable for transmitting a control signal from the control box 10 to the car 4, 12 denotes an operation panel provided inside the car 4, and 13 denotes a landing 2 , 2a. Next, the operation will be described. In such an elevator, a command received from a user (not shown) by the operation panel 12 or the call button 13 is transmitted to the control box 1.
0 is transmitted. The control box 10 that has received the command controls the operation of the driving device 7 and moves the car 4 to the landing 2 to which the command is issued. When the car 4 arrives at the hall 2, the car door 5 and the hall door 3a open and close in conjunction with each other, so that the user can get into the car 4. Also, in such an elevator, when the power is cut off due to a power failure or the like, the car 4 is moved, for example, to a position between the hall 2 and the hall 2a in the hoistway 1 (the car 4a indicated by a dotted line in FIG. 7). Position). In such a case, if a user (not shown) left in the car 4 tries to open the car door 5, the car door 5 may be opened depending on how to apply force. When the car door 5 is opened between the landing 2 and the landing 2a,
Since there is a gap 14 between the car 4 and the wall surface 1a facing the landing 2, 2a side of the hoistway 1, there is a risk that a user may accidentally fall from the car 4 into the gap 14. For this reason, usually, a fetch shear plate 15 is arranged on the wall surface 1a in the hoistway 1 so as to fill the gap 14, thereby preventing a user from accidentally falling from the car 4 into the gap 14. Note that the fetch plate 15 is not attached to the hoistway of the chimney elevator at all, and is not attached to a general elevator having an old building age.

[0003]

However, since the fetch shear plate 15 must be mounted between the landings adjacent to each other vertically, such as between the landing 2 and the landing 2a, the fetch shear plate is particularly used for high-rise buildings. 1
In the case where 5 is installed, the cost increases, the construction period is required for a long time, and it is not economical. In addition, when the strength of the building is not sufficient as in the case of a chimney elevator because the fetcher plate 15 is heavy, There was a problem that the building itself had to be reinforced. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevator car door interlock device which is low-cost, can be installed in a short construction period, is lightweight, and does not require installation of a conventional fetcher plate.

[0004]

According to the first aspect of the present invention, there is provided an elevator car door interlock device, wherein a hanger fixed to an upper edge is hung on a hanger rail extending in a width direction of the entrance above the entrance of the car. An elevator car door interlock device which is lowered and guided by a hanger rail to open and close a car entrance, wherein an engaged portion provided on a hanger and a hanger near a hanger when the car door is fully closed. , A first lever extending outward of the car, a second lever extending inward of the car, and a second lever extending inward of the car with a predetermined opening angle with the second lever. A third lever which is provided on the car, and is provided between the car and the lever, the first lever being pivoted about the horizontal axis and having the first lever as a car. Direction that projects outward from A spring for urging the lever to rotate, and a spring provided on the third lever to engage with the engaged portion to prevent the hanger from opening, and the first lever is moved outward from the car. An engaging portion for preventing the lever from rotating in the direction in which the lever protrudes, and a first position for retracting the engaging portion so as not to be engaged with the engaged portion, and engaging the engaging portion with the engaged portion. And a second position in response to the opening / closing operation of the hanger.
A guide plate provided on the hanger to guide the lever of the first position or the second position, and a first lever provided on the inner wall surface of the hoistway at the entrance of each landing, over the entire height of the entrance. And the first lever is prevented from rotating in the direction in which the first lever projects outward from the car by contacting the end of the guide plate, and the second lever is moved between the first position and the second position of the guide plate. A limiting plate for holding the intermediate lever in an intermediate position, wherein when the car has landed on the landing, the end of the first lever abuts the limiting plate so that the first lever projects outward from the car. Rotation is prevented, and the second lever is held at an intermediate position between the first position and the second position of the guide plate, enabling the opening operation of the car door, and the car landing on each landing. In some cases, the second lever is guided by the guide plate and is located at the second position, and the engaging portion is in contact with the engaged portion. Combined and, characterized in that so as to prevent the opening operation of the car door.

[0005] In the elevator car door interlock device according to the second aspect, when the first lever comes into contact with the limit plate at the end of the first lever, the second lever rolls along the limit plate. One roller is supported.

In an elevator car door interlock device according to a third aspect of the present invention, a second roller rolling along a guide plate is supported at the end of the second lever.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an elevator equipped with an elevator car door interlock device according to an embodiment of the present invention, and FIG. 2 is equipped with an elevator car door interlock device according to an embodiment of the present invention. FIG. 3 is a front view showing a car, FIG. 3 is a top view showing a car equipped with an elevator car door interlock device according to an embodiment of the present invention, and FIG. 4 is a diagram showing an elevator car door according to an embodiment of the present invention. 5 and 6 are diagrams showing the operation of the elevator car door interlock device according to the embodiment of the present invention. FIG. 5 and FIG. 6 show the conventional technology shown in FIG. The same or corresponding portions are denoted by the same reference characters, and description thereof will be omitted. In the figure, 15 is a stay attached to the car 4, 16
a is a first lever, and 16c and 16d are a second lever and a third lever, each of which branches from the first lever 16a in a substantially Y-shape with the shaft hole 16b as a base point.
Further, the third lever 16d is moved halfway from the second lever 16d.
It further branches in a direction substantially parallel to c, and has an engaging portion 16e at its end. Reference numeral 16 denotes an integrated lever composed of a first lever 16a, a shaft hole 16b, a second lever 16c, a third lever 16d, and an engagement portion 16e, which is provided in the car 3 through the shaft hole 16d. The shaft 17 is a horizontal axis. Reference numeral 18 denotes a large roller pivotally supported at the end of the first lever 16a.
Is a small roller pivotally supported at the end of the second lever 16c;
0 is attached to the upper part of the car door 5 and has an engaged part 20a at the upper end (the upper right end in FIG. 4).
b is provided on the hanger 20, and the small roller 19 is moved to the first position 21a or the second position 21a.
Is mounted between the third lever 16d and a spring fixing base 23 provided on the car 4 so that the first lever 16a is connected to the car 4 by the first lever 16a.
And a spring 24 for urging the car 4 in a direction to protrude outward from the car 4 at the stop position of the car 4 of each landing 2 on the inner wall of the hoistway 1 for the movement of the large roller 18 as the car 4 moves. Are provided intermittently along the route (the number corresponding to the number of the landings 2 of the building), and are provided on the inner wall surface of the hoistway of the entrance 3 of each landing 2 over the entire height of the entrance 3. The lever 16 and the guide plate 21 are connected to the second lever 16c.
Of the guide plate 21 at the first position 21a
When it is, the engaging portion 16e does not engage with the projection 20a,
When the small roller 19 is at the second position 21b of the guide plate 21, the engaging portion 16e has a positional relationship of engaging with the engaged portion 20a. In addition, the limiting plate 24 may be installed so as to abut the trajectory of the movement of the large roller 18 (that is, so that the large roller 18 rolls the limiting plate 24), but usually corresponds to a high-speed elevator. In order to achieve this, they are spaced apart from each other in the left-right direction in FIG. That is, as the car 4 moves, the large roller 18
By not touching the car, the riding comfort of the car 4 is improved.

Since the operation mechanism of the car 4 is exactly the same as that of the conventional elevator, the operation mechanism of the car door interlock device of the elevator according to the present invention will be described below. The lever 16 is always urged in a direction in which the lever 16 is engaged with the engaged portion 20a of the hanger 20 by a spring 22 that is provided so as to extend from its natural length. When the car door 5 is completely closed, as shown in FIG.
In the first position 21a, the engaging portion 16e is not engaged with the engaged portion 20a. First, the operation mechanism of the elevator car door interlock device when there is no limiter plate 24 near the large roller 18, that is, when the car 4 stops between the landing 2 and the landing 2 a in the hoistway 1 will be described. I do. When the car door 5 moves in the opening direction (left direction in FIG. 4), the hanger 20 also moves in the same direction as the car door 5 moves. At this time, the guide plate 21 attached to the hanger 20 also moves leftward in FIG. 4, so that the small roller 19 at the end of the second lever 16 c is urged by the spring 22 and pressed by the guide plate 21. From the first position 21a to the second
To the position 21b. With the movement of the small roller 19, the lever 16 rotates counterclockwise about the shaft 17 in the figure, and when the small roller 19 reaches the second position 21b, the engaging portion 16e as shown in FIG. Engages with the engaged portion 20a. Therefore, when the electric power is cut off due to a power failure or the like and the car 4 stops between the hall 2 and the hall 2a in the hoistway 1, if the car door 5 is to be opened by itself, the engaging portion 16e
Is engaged with the engaged portion 20a of the hanger 20, and the further opening operation of the car door 5 is prevented. Therefore, it is possible to prevent the user trapped in the car 4 from falling into the gap 14 in an attempt to escape from the car 4 by opening the car door 5.

Next, as shown in FIG. 4, when the large roller 18 is close to the limit plate 24, that is, when the car 4 is stopped at the landings 2 and 2a in the hoistway 1, the elevator car door is closed. The operation mechanism of the interlock device will be described. When the car door 5 moves in the opening direction, the small roller 19 urged by the spring 22 moves from the first position 21a to the second position 21b while being pressed by the guide plate 21. The movement of the small roller 19 causes the lever 16 to rotate counterclockwise. However, as shown in FIG. 6, since the limit plate 24 is located at a small distance from the side of the large roller 19, the large roller 18 is moved before the small roller 19 reaches the second position 21 b. Contact 24. For this reason,
Since the lever 16 cannot rotate further counterclockwise and the engaging portion 16e does not engage with the engaged portion 20a, the elevator car door interlock device of the present invention has a car door. 5 does not interfere. In addition, when the limiting plate 24 is installed at the above-described minute distance with respect to the trajectory of the movement of the large roller 18 as described above, FIG.
As shown in FIG. 7, even if the lever 16 rotates with the opening operation of the car door 5, the limit plate 24 is moved by the distance that the engaging portion 16e does not engage with the engaged portion 20a. It should just be set apart from. When the limiting plate 24 is installed so as to be in contact with the trajectory of the movement of the large roller 18 accompanying the movement of the car 4 (that is, without the small distance described above), the car 4 stops at the landings 2 and 2a. If you try to open the car door 5 while doing, because the car door 5 is closed,
The large roller 18 has already contacted the limiting plate 24. Therefore, the lever 16 does not rotate, and the engaging portion 16e does not engage with the engaged portion 20a, so that the elevator car door interlock device of the present invention prevents the operation of the car door 5. There is no.

In the elevator car door interlock device of the present invention, the engaging portion 16e is connected to the car door 5
Is engaged with the engaged portion 20a when it is moved 40 mm in the opening direction (left direction in the figure) from the completely closed position. Also, when the car door 5 moves by 40 mm, a gap of 20 mm is formed in the entrance 3 of the car 4, and in the inspection work of the elevator, etc.
When the operator wants to open the car door 5 from within the car 4 with the car 4 stopped between the hall 2 and the hall 2a,
The second lever 16c is pushed upward in FIG. 6 from a gap of 0 mm using an elongate rod member or the like (not shown) so that the lever 1
By rotating clockwise, the engaging portion 16e is disengaged from the engaged portion 20a, so that the interlock device of the present invention can be released and the car door 5 can be opened.

As described above, according to the elevator car door interlock device of the present invention, when the car 4 is stopped at the landings 2 and 2a in the hoistway 1, the car door 5 is opened. But the power is cut off due to a power outage etc.
When the car 4 stops between the landing 2 and the landing 2a in the hoistway 1, the car door interlocking device of the present invention operates to prevent the car door 5 from being opened.
It is possible to prevent a user trapped inside the car 4 from falling into the gap 14 from the car 4. Further, by attaching the elevator car door interlock device of the present invention to the elevator, it is not necessary to mount the fetch shear plate in the hoistway 1 as in the related art. Therefore, the construction period can be shortened and the cost can be significantly reduced.The weight of the equipment itself is light, so it is particularly effective to install it in new buildings, chimney elevators, old buildings, etc. I do.

[0012]

According to the first aspect of the present invention, there is provided an elevator car door interlock apparatus, wherein a hanger fixed to an upper edge is hung on a hanger rail extending in the width direction of the entrance above the entrance of the car. An interlock device for an elevator car door that opens and closes an entrance of a car by being guided by a rail, and is provided near an engaged portion provided on a hanger and a hanger when the car door is fully closed. A horizontal axis, a first lever extending outward of the car, a second lever extending inward of the car, and a third lever extending inward of the car at a predetermined opening angle with the second lever. And a lever is provided between the car and the lever, which is pivotally supported on the horizontal axis, and the first lever is moved outward from the car with the horizontal axis as the center of rotation. I will rotate it in the protruding direction A spring for biasing the lever to the third
Engaging with the engaged portion to prevent the hanger from opening, and to prevent the first lever from rotating outward in the direction in which the first lever projects outward from the car. Department and
A first position for retracting the engaging portion so as not to be engaged with the engaged portion and a second position for engaging the engaging portion with the engaged portion; A guide plate provided on the hanger so as to guide the second lever to the first position or the second position, and a guide plate provided on the inner wall surface of the hoistway at the entrance of each landing, over the entire height of the entrance; The first lever abuts on the end of the lever to prevent the lever from rotating in the direction in which the first lever projects outward from the car, and moves the second lever to the first position and the second position of the guide plate. A limit plate that is held at an intermediate position between the first and second levers, wherein when the car has landed on the landing, the end of the first lever comes into contact with the limit plate and the first lever projects outward from the car. Is prevented, and the second lever is held at an intermediate position between the first position and the second position of the guide plate. When the car arrives between the landings, the second lever is guided by the guide plate to be located at the second position, and the engaging portion is engaged with the engaged portion. To prevent the opening of the car door, the power is cut off due to a power failure, etc., and the car door stops even if the car stops between adjacent landings in the hoistway. Does not open, and it is possible to prevent a user trapped in the car from falling off the car.

According to a second aspect of the present invention, in the elevator car door interlock device, when the first lever comes into contact with the limit plate at the end of the first lever, the first lever rolls along the limit plate. Since one roller is pivotally supported, the lever can be smoothly rotated.

In the elevator car door interlock device according to the third aspect, the second roller that rolls along the guide plate is supported at the end of the second lever. Can be smoothly rotated.

[Brief description of the drawings]

FIG. 1 is a side view showing an elevator car door interlock device and an elevator according to an embodiment of the present invention.

FIG. 2 is a front view showing an elevator car door interlock device and a car according to the embodiment of the present invention.

FIG. 3 is a top view showing an elevator car door interlock device and a car according to the embodiment of the present invention.

FIG. 4 is a conceptual diagram of a main portion of an elevator car door interlock device according to an embodiment of the present invention.

FIG. 5 is a diagram showing the operation of the elevator car door interlock device according to the embodiment of the present invention.

FIG. 6 is a diagram showing an operation of the elevator car door interlock device according to the embodiment of the present invention.

FIG. 7 is a side view of a conventional elevator.

[Explanation of symbols]

1 hoistway, 2 landings, 4 cars, 5 cars door, 16a
First lever, 16c Second lever, 16d Third
Lever, 16e engaging part, 17 axis (horizontal axis), 18
Large roller (roller), 19 Small roller (roller), 2
0 hanger, 21 guide plate, 21a first position, 2
1b Second position, 22 springs, 24 limiting plates.

Claims (3)

[Claims] 1. A hanger fixed to an upper edge is hung above a doorway of a car on a hanger rail extending in the width direction of the doorway, and guided by the hanger rail to open and close the doorway of the car. An elevator car door interlock device, comprising: an engaged portion provided on the hanger; a horizontal shaft provided near the hanger when the car door of the car is fully closed; A first lever extending inwardly, a second lever extending inward of the car, and a third lever extending inward of the car at a predetermined opening angle with the second lever. And a lever pivotally supported by the horizontal shaft and attached to the car; and a lever provided between the car and the lever, wherein the first lever is connected to the car by using the horizontal shaft as a center of rotation. Direction that projects outward from A spring for urging the lever to rotate, a spring provided on the third lever, engaging with the engaged portion to prevent the hanger from opening, and the first lever An engaging portion for preventing the lever from rotating in a direction in which the lever projects outward from the car; a first position for retracting the engaging portion so as not to engage with the engaged portion; A second position for engaging the engagement portion with the engaged portion, and guiding the second lever in conjunction with the opening / closing operation of the hanger to position the engagement portion in the first position or the second position; A guide plate provided on the hanger and a hoistway inner wall surface of an entrance of each landing are provided over the entire height of the entrance, and the first lever is brought into contact with an end portion of the first lever to contact the end of the first lever. Preventing the rotation of the lever in a direction protruding outward from the car, and A limiting plate for holding a second lever at an intermediate position between the first position and the second position of the guide plate, wherein when the car has landed on the landing, the first lever The end of the lever comes into contact with the limiting plate, so that the first lever is prevented from rotating in the direction in which the first lever projects outward from the car, and the second lever is moved to the first position of the guide plate. And the second position is held at an intermediate position between the first position and the second position to enable the opening operation of the car door. When the car is landed between the landings, the second lever is guided by the guide plate. Wherein the engaging portion is engaged with the engaged portion to prevent the opening operation of the car door, and wherein the opening of the car door is prevented. apparatus. 2. A first roller which rolls along the limiting plate when the first lever comes into contact with the limiting plate is supported at an end of the first lever. Item 2. An interlock device for an elevator car door according to Item 1. 3. A second roller which rolls along the guide plate is supported at an end of the second lever.
Alternatively, the elevator car door interlock device according to claim 2.