JP2521603B2 - 4-link type elevator door device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-link type elevator door apparatus, and more particularly to a four-link type elevator door apparatus suitable as a door apparatus for a high ceiling cab.

[0002]

2. Description of the Related Art FIG. 3 is a front view showing an example of a two-link type elevator door apparatus disclosed in, for example, Japanese Patent Laid-Open No. 3-102090, and FIG. 4 is a sectional view taken along the line AA of FIG. . 3 and 4, 1 is an elevator car, 2
The entrance and exit of the car 1, 3 and 4 are left and right sliding doors for opening and closing the entrance 2 by half, and 5 is the ceiling of the car room. Above this,
A cab upper plate 6 including a horizontally installed upper plate 6a and a front plate 6b hanging from a front end of the upper plate 6a is installed. A door device mounting girder 7 is vertically arranged in front of the front plate 6b, a girder lower beam 8 is provided at a lower end thereof, and a room upper plate 6 thereof is provided.
A girder beam 9 is provided at an upper end located above the girder, and an electric motor 10 and a controller 11 which are driven in forward and reverse directions are mounted on the girder beam 9.

Reference numeral 12 is a mounting plate installed above the doorway 2 between a plurality of connecting plates 13 for connecting the girder beam 8 and the girder beam 9, and the reduction mechanism 14 is provided on the front side of the mounting plate 12. Is installed. The speed reduction mechanism 14 includes the rotating shaft 10 of the electric motor 10.
A first pulley 15 fitted and fixed to a, a second pulley 17 pivotally attached to the mounting plate 12 and to which a driving force is transmitted from the first pulley 15 via an endless belt 16, and a second pulley 17 pivotally attached to the mounting plate 12. And a third pulley 20 to which the driving force is transmitted from a small pulley 18 fixed to the second pulley 17 coaxially with the second pulley 17 via an endless belt 19. Therefore,
The axis of pivotal attachment of the third pulley 20 to the mounting plate 12 is a reduction mechanism 14
Also serves as the output shaft 21 of.

On the front end face of the third pulley 20 on the output shaft 21 side of the speed reduction mechanism 14, a pair of drive arms (hereinafter referred to as first links) 22 and 23 are arranged in series on a straight line passing through the output shaft 21. It is fixed to the third pulley 20. Then, one ends of the second links 24, 25 of the left and right sliding doors 3, 4 are pivotally attached to the ends of the first links 22, 23 opposite to the output shaft side, respectively. Furthermore, each second link 24, 25
The upper ends of the arms 26 and 27 are pivotally attached to the other ends of the arms 26 and 27, respectively. The lower ends of the arms 26 and 27 are fixed to the door hangers 28 and 29 of the left and right sliding doors 3 and 4, respectively.

A hanger rail 30 is fixed to the girder beam 8, and hanger rollers 31, 32 pivotally attached to the door hangers 28, 29 of the left and right sliding doors 3, 4 are rotatably engaged with the hanger rail 30. Has been done. Note that 33 is a car frame, and the girder beam 9 is fixed to the frame 33. Further, 34 is a door position sensor provided on the girder beam 8, and 35 is a bearing of the output shaft 21.

Next, the operation of the twin link type elevator door apparatus having the above-mentioned structure will be described. The electric motor 10 of the door machine is energized by a signal from the controller 11, and the rotating shaft 10a of the electric motor 10, the first pulley 15, the endless belt 16, the second pulley 17, the small pulley 18, the endless belt 19, and the third pulley. The output shaft 21 through 20 is shown in FIG.
When rotated counterclockwise, the first links 22 and 23 also rotate in the same direction. By the rotation of the first links 22 and 23, the left and right sliding doors 3 and 4 are pushed and opened in the left-right direction from the closed position via the second links 24 and 25.

Further, when the electric motor 10 is biased from this state and the rotary shaft 10a is driven in the reverse direction, the output shaft 21 moves to the position shown in FIG.
And the first links 22 and 23 also rotate in the same direction. Therefore, the left and right sliding doors 3 and 4 are attracted via the respective second links 24 and 25, and the opposite end edges of these are abutted to close the car doorway 2.

In the double link type elevator door apparatus as described above, both the second pulley 17 and the third pulley 20 of the reduction mechanism 14 are arranged on the front surface of the car room ceiling 5, so that the high ceiling of the car room is provided. It has become easier to deal with this.

FIG. 5 is a front view showing an example of a conventional four-link type elevator door apparatus, and FIG. 6 is a cross-sectional view schematically showing the main part thereof, and the parts corresponding to FIGS. 3 and 4 are the same. It is attached with a code. 5 and 6, 40 is a third
A single drive arm (hereinafter, referred to as the first link) fixedly arranged on the front end surface of the pulley 20 in the radial direction thereof, 41 is a second link whose one end is pivotally attached to the first link 40, and 42 is a working direction. The third link on the sliding door 3 side, which has one end pivotally attached to the connecting plate 13 via the bracket 43 and the other end pivotally attached to the other end of the second link 41, One end is pivotally attached to the other end of the third link 42 and the other end is a fourth link pivotally attached to the sliding door 3. Further, one end of the connecting rod 45 is pivotally attached to the third link 42 at a central portion between the connecting portion of the connecting plate 13 and the connecting portion of the second link 41, and the other end of the connecting rod 45 is attached to the third link 42. Sliding door 4
The link 46 that constitutes the third link on the side is pivotally attached to a portion near one end side. One end of the link 46 is pivotally attached to the connecting plate 13 on the upper side of the sliding door 4 via a bracket 47, and the other end is pivotally attached to one end of a link 48 constituting a fourth link on the sliding door 4 side. The other end of the link 48 is pivotally attached to the sliding door 4. Reference numeral 49 in FIG. 6 denotes a bearing of the second pulley 17.

Next, the operation of the four-link type elevator door apparatus having the above-mentioned structure will be described. The electric motor 10 of the door machine is energized by a signal from the controller 11, and the rotating shaft 10a of the electric motor 10, the first pulley 15, the endless belt 16, the second pulley 17, the small pulley 18, the endless belt 19, and the third pulley. The output shaft 21 through 20 is shown in FIG.
When rotated clockwise, the first link 40 also rotates in the same direction. When the first link 40 rotates, the second link 41
When the third link 42 pivots in the clockwise direction around the pivotally attached portion of the bracket 43 to the connecting plate 13 via the, the fourth link 44 on the sliding door 3 side is pulled to move the sliding door 3 in the door opening direction. At the same time, the connecting rod 45 is pushed to connect the link 46, which is the third link on the sliding door 4 side, to the connecting plate 1 by the bracket 47.
Swing in a counterclockwise direction about the pivotal connection to 3
The link 48, which is the fourth link on the side, is pulled to move the sliding door 4 in the door opening direction. As a result, the left and right sliding doors 3, 4
Is pulled from the closed position to the left and right and pushed open.

Further, when the electric motor 10 is biased from this state and the rotary shaft 10a is driven in the reverse direction, the output shaft 21 moves to the position shown in FIG.
Rotates counterclockwise, and the first link 40 also rotates in the same direction. When the first link 40 rotates, the third link 42 causes the bracket 43 to connect the connecting plate 1 via the second link 41.
3 is pivoted counterclockwise around the pivotally attached part, and the fourth link 44 on the sliding door 3 side is pushed to move the sliding door 3 in the door closing direction, and at the same time, the connecting rod 45 is pulled to link on the sliding door 4 side. 46 is pivoted in the clockwise direction around the pivotal attachment portion of the bracket 47 to the connecting plate 13, and the link 48 on the sliding door 4 side is pushed to move the sliding door 4 in the door closing direction. As a result, the left and right sliding doors 3 and 4 are pulled from the open position, and the opposing end edges of these are brought into contact with each other to close the car doorway 2.

Compared to the former two-link type elevator door device, the four-link type elevator door device as described above has a large load applied when the door is opened and closed and requires a large space for the link mechanism portion. It is unavoidable that the bearing 49 of the second pulley 17 positioned rearward of the third pulley 20 largely projects rearward, and it is difficult to dispose the reduction gear mechanism 14 in front of the cab ceiling 5. Therefore, conventionally, even when the ceiling of the cab of such a four-link type elevator door apparatus is made high, the speed reduction mechanism 14 is used for the cab ceiling 5 of the cab.
It is arranged above.

[0013]

In the conventional elevator door apparatus constructed as described above and having the former two-link type, the reduction mechanism 14 can be arranged in front of the cab ceiling 5. , It is easy to make the ceiling of the car room high and it is easy to secure a working space above the car. However, in the latter of the four-link type, even if the ceiling of the car room is made high, The 3rd pulleys 17 and 20 are connected to the ceiling 5 of the cab.
Since it is arranged above the car, there is a problem that a working space above the car cannot be sufficiently secured.

In the latter of the four-link system, when the speed reducing mechanism 14 is arranged above the car room ceiling 5 when the ceiling of the car room is increased, if the setting positions of the link mechanisms are both moved upward, Left and right sliding doors 3,
There is a problem that the connection point with 4 moves upward and shifts from the position of the center of gravity of the left and right sliding doors 3 and 4, so that the left and right sliding doors 3 and 4 cannot be smoothly opened and closed. Furthermore, in order to avoid such a problem, when only the reduction mechanism 14 is moved upward, that is, the set positions of only the second pulley 17 and the third pulley 20 are moved upward, the bracket 43 of the third link 42 is moved.
It is necessary to set a long distance from the pivotally attached part to the connecting plate 13 to the second link 41. In this case, the movement amount of the left and right sliding doors 3 and 4 by the link mechanism changes. There was a drawback in that it was forced to make major changes to the entire mechanism.

In view of the above points, the present invention solves the above-mentioned problems in the four-link type, and obtains a four-link type elevator door device capable of achieving a high ceiling without changing the link mechanism. Is intended.

[0016]

In a four-link type elevator door apparatus according to the present invention, a plurality of driving forces from an electric motor are installed on a front side of a door apparatus mounting girder side disposed above a car entrance / exit. At least one of the links is transmitted to the four-link mechanism pivotally attached to the door device mounting girder side via a speed reducing mechanism including a pulley and an endless belt, and the left and right movable from the four-link mechanism in opposite directions. A sliding door, or a sliding door that is movable in the same direction as each other, comprising a door machine for opening and closing the sliding door,
Among the pulleys of the speed reduction mechanism, a final pulley, which is an output part of the speed reduction mechanism and has a relatively small amount of rearward protrusion of its bearing part, is provided as compared with the car room ceiling on the front side of the door device mounting girder side. Another pulley, which is arranged at a lower position and has a larger amount of protrusion of the bearing portion toward the rear than the final pulley, is arranged at a position higher than the cab ceiling on the front side of the door device mounting girder side. .

[0017]

In the present invention, the final pulley, which is the output portion of the reduction mechanism, is arranged at a position lower than the cab ceiling on the front surface of the door device mounting girder side, and the other pulleys are located on the front surface of the door device mounting girder side. Since it is arranged at a position higher than the ceiling of the car room, it is possible to achieve a high ceiling without changing the link mechanism.

[0018]

The present invention will be described below with reference to the illustrated embodiments.
FIG. 1 is a front view showing a four-link type elevator door apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view schematically showing a main portion thereof, and parts corresponding to FIGS. The same reference numerals are attached. 1 and 2, reference numeral 50 denotes a mounting plate for installing the reduction mechanism 14 on the side of the door device mounting girder 7, which connects the girder lower beam 8 and the girder upper beam 9 of the door device mounting girder 7. It is installed between the plurality of connecting plates 13. Also,
The mounting plate 50 has a vertical dimension as shown in FIGS.
The length is set to be longer than that of the conventional one, and the dimension in the left-right direction thereof is set to be shorter than that of the conventional one. The position is set so as to be lower than the ceiling 5. A final pulley, that is, an output portion of the reduction mechanism 14, that is, a third pulley 20, is pivotally attached to a lower portion of one side of the mounting plate 50, which is lower than the ceiling 5 of the cab. That is, the third pulley 20 is installed so that its position is the same as the conventional position. In addition, the second pulley 17
The bearing 49 is pivotally attached to the upper portion of the other side of the mounting plate 50, and is set to be positioned higher than the cab ceiling 5. The configuration and operation other than those described above are the same as those in FIG. 5 and FIG. 6, and thus the description thereof will be omitted.

Therefore, in the apparatus of this embodiment, the setting position of the third pulley 20 is the same as the conventional position, and the mounting plate 50 is
Since only the second pulley 17 is attached to a position higher than the car room ceiling 5, there is no need to change the link mechanism when the ceiling is made high, the opening / closing characteristics of the door are not deteriorated, and the upper part of the car is provided. A sufficient working space can be secured. In addition, since the pulleys of the speed reduction mechanism 14 are basically arranged in the vertical direction, the speed reduction mechanism 14 is provided in front of the mounting plate 50.
The space occupied by can be compressed in the width direction (left-right direction).

[0020]

As described above, according to the present invention, the final pulley, which is the output portion of the speed reducing mechanism, is arranged at a position lower than the cab ceiling on the front surface of the girder side for mounting the door device, and other pulleys are arranged. Is arranged at a position higher than the cab ceiling on the front side of the door device mounting girder side, so that at least one of the links can be connected to the door device mounting girder side without changing the four-link mechanism. There is an effect that a high ceiling can be achieved.

[Brief description of drawings]

FIG. 1 is a front view of a four-link type elevator door apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a main part of FIG.

FIG. 3 is a front view showing an example of a two-link type elevator door device.

4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a front view of a conventional four-link elevator door device.

6 is a cross-sectional view schematically showing a main part of FIG.

[Explanation of symbols]

 1 Elevator Car 2 Car Doorway 3,4 Left and Right Sliding Doors 5 Car Room Ceiling 7 Door Device Mounting Girder 10 Electric Motor 14 Reduction Mechanism 15 First Pulley 16 Endless Belt 17 Second Pulley (Other Pulley) 19 Endless Belt 20 Third Pulley (Final pulley) 21 Output shaft of reduction mechanism 40 First link 41 Second link 42 Third link 44 Fourth link 49 Bearing (bearing part of other pulley)

Claims (1)

(57) [Claims] 1. A driving force from an electric motor is passed through a reduction mechanism composed of a plurality of pulleys and an endless belt installed on the front side of a door device mounting girder side disposed above a car entrance and exit, and at least one of the links is Transmission to a four-link mechanism pivotally attached to the door device mounting girder side, and transmission from the four-link mechanism to left and right sliding doors movable in opposite directions, or to sliding doors movable in the same direction, In a four-link type elevator door apparatus equipped with a door machine that drives a sliding door to open and close, in a pulley of the speed reduction mechanism, an amount of protrusion of the output part of the speed reduction mechanism and a bearing part thereof toward the rear is relatively small. A final pulley is arranged at a position lower than the cab ceiling on the front side of the door device mounting girder side, and another pulley having a larger amount of protrusion of the bearing portion rearward than the final pulley. The door device quadruple link elevator door device, characterized in that arranged in the upper position than the cab ceiling in front of the mounting girder side.