JP2007076900A - Car door driving device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door driving device improved to ensure a clearance for equipments provided in a top part of a shaft easily. <P>SOLUTION: A part forming a recessed part 21a to receive equipments to prevent interference with the equipments 9 installed in the top part of the shaft when a car 1 rises further by exceeding a predetermined elevating position is formed in its upper part. Consequently, the clearance among the equipments installed in the top part of the shaft and the door driving device 20 can be ensured without increasing overhead dimension. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a door drive device that opens and closes a car door of an elevator, and more particularly to a technique for improving the door drive device so as to easily secure a clearance for devices provided at the top of a hoistway.

  2. Description of the Related Art Conventionally, various so-called machine roomless elevators that do not have a machine room above a hoistway have been developed and proposed in order to efficiently use a space in a building and avoid problems such as the right to sunshine.

For example, in the machine roomless elevator (see Patent Document 1 below) shown in FIG. 8, the car 1 moves up and down in the hoistway while being guided by a pair of left and right car side guide rails 2L and 2R.
A pair of left and right doors 3L and 3R provided on the front surface of the car 1 open and close in the left-right direction.
The car frame that supports the car 1 has an upper beam 4 that extends horizontally in the left-right direction above the car 1, and a pair of left and right vertical beams 5L and 5R connected to the left and right ends of the upper beam 4. is doing.
In addition, a sheave support beam 6 that extends in an inclined manner in a horizontal plane with respect to the upper beam 4 is provided in a vertical gap between the upper surface of the car 1 and the upper beam 4.
The sheave support beam 6 is connected to the upper beam 4 so that the upper surface of the central portion in the longitudinal direction is in close contact with the lower surface of the central portion in the longitudinal direction of the upper beam 4.
The sheave support beam 6 is rotatably supported at both ends by a pair of left and right car sheaves 7L and 7R.

The traction sheave 8 disposed in the vicinity of the upper end portion of the left car side guide rail 2L is rotationally driven by a hoisting machine 9 having a rotating shaft extending in the front-rear direction.
Of the hoisting rope 10 wound around the traction sheave 8, a portion 10a extending toward the car 1 side is a portion extending downward from the traction sheave 8 toward the left car upper sheave 7L, which is a pair of left and right car upper sheaves 7L and 7R. Between the right car upper sheave 7R and a part fixed to the right hitch part 11R. The car 1 is suspended by 2: 1 roping.
A portion 10b of the hoisting rope 10 that extends downward along the left side surface of the car 1 extends upward after being wound around a weight-side sheave rotatably supported on the upper portion of a counterweight (not shown). It is fixed to the left hitch portion 11L, and the counterweight is suspended by 2: 1 roping.

Further, a door driving device 12 for opening and closing the pair of left and right doors 3L and 3R is provided on the front upper portion of the car 1.
Then, by operating the door motor 13 disposed on the car 1, the pair of left and right doors 3L and 3R can be opened and closed while interlocking (for example, see Patent Document 2 below).

JP 2004-1904 A JP 2004-217338 A

By the way, in a recent machine roomless elevator, the vertical dimension (overhead dimension) between the floor surface of the uppermost landing floor and the ceiling surface of the hoistway tends to be small.
Along with this, when the car 1 is landed on the uppermost landing floor, equipment such as a hoisting machine 9 provided at the top of the hoistway, the superstructure of the car 1 and the car 1 The vertical dimension between the door drive device 12 and other devices disposed on the top also tends to be small.

On the other hand, the car 1 attempts to further rise beyond a predetermined lift position corresponding to the uppermost landing floor in an emergency.
Accordingly, when the car 1 further rises beyond a predetermined lift position, the equipment provided on the ceiling surface of the hoistway or the top of the hoistway and the superstructure of the car 1 or the car 1 It is obligated by laws and regulations to provide a predetermined clearance so as not to come into contact with devices arranged on the top.

However, in the conventional machine roomless elevator shown in FIG. 8, the hanger case 14 of the door driving device 12 provided at the front upper portion of the car 1 extends upward over the entire width in the left-right direction of the car 1. A hoisting machine 9 is arranged on the left side in front of the top of the hoistway.
As a result, when the car 1 further rises beyond a predetermined lift position, the left end of the hanger case 14 may come into contact with the hoisting machine 9.

Therefore, it is necessary to ensure a predetermined clearance between the hoisting machine 9 and the hanger case 14, but it is difficult to change the position or shape of the hoisting machine 9, and it is also difficult to change the position of the hanger case 14. It is.
As a result, in a conventional machine roomless elevator, the hoistway must be extended upward and the hoisting machine 9 has to be arranged at a higher position. However, since the overhead dimension increases, this machine roomless elevator is installed. The space efficiency of the building will be reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an improved door drive device that solves the above-described problems of the prior art and can easily secure a clearance for devices provided at the top of a hoistway. is there.

The means described in claim 1 for solving the above problem is
A door driving device for opening and closing an elevator car door,
A concave portion is formed on the upper part so that the equipment can be received so that the equipment does not interfere with the equipment installed at the top of the hoistway when the car further rises beyond a predetermined lifting position. It is characterized by being.

That is, in the elevator car door drive device according to claim 1, since the concave portion is formed in the upper part so as to be able to receive the devices installed at the top of the hoistway, Even if it rises beyond the predetermined lift position, the equipment is received in the concave part and does not interfere.
Thereby, the clearance between the equipment provided at the top of the hoistway and the door driving device can be ensured without increasing the overhead dimension.

The means described in claim 2 is the elevator car door drive device described in claim 1,
The door driving device has a hanger case fixed above the car door and extending vertically and horizontally;
The concave portion is formed by cutting out an upper portion of the hanger case.

That is, in the elevator car door drive device according to the second aspect, the concave portion is formed by cutting out the upper portion of the hanger case, which is the uppermost portion of the door drive device.
Thereby, not only the concave portion can be easily formed, but also the concave portion can be freely formed in accordance with the position in the left-right direction of the device provided at the top of the hoistway.

The means described in claim 3 is the elevator car door drive device described in claim 2,
The door driving device is
A pair of left and right pulleys rotatably supported at both left and right ends of the upper portion of the hanger case;
An endless belt wound around these pulleys and extending in the left-right direction;
A connecting member for connecting the belt and the car door;
The pulley is disposed so as to avoid the concave portion formed in the hanger case;
A portion of the connecting member that is connected to the belt does not come into contact with a pulley that is disposed so as to avoid the concave portion when the car door is open. Of these, the position connected to the car door is shifted in the left-right direction.

That is, if a concave portion is formed by cutting out the left end portion of the upper portion of the hanger case, for example, the left pulley position of the pair of left and right pulleys must be shifted to the right.
Along with this, the car door that opens to the left side is connected to the belt when the car door is opened unless the position of the connecting member connected to the belt is shifted to the right side. Part will interfere with this pulley.
On the other hand, the horizontal position of the connecting member connected to the car door is determined by the horizontal position of the car door, and the position does not change even if the hanger case is cut away.
Therefore, with respect to this connection member, the portion connected to the car door and the portion connected to the belt are displaced in the left-right direction.
In other words, like the elevator car door drive device described in claim 3, by shifting the position of the connecting member connected to the car door and the part connected to the belt in the left-right direction, Thus, the car door can be opened and closed without interference between the connecting member and the pulley.

According to a fourth aspect of the present invention, there is provided the elevator car door drive device according to the third aspect.
The car door is composed of a pair of left and right doors,
The connection member is composed of a pair of left and right connection members respectively coupled to the pair of left and right doors;
A portion connected to the belt in the connection member for one of the pair of left and right doors, and a portion connected to the belt in the connection member for the other of the pair of left and right doors in the front-rear direction. It is characterized by being shifted in position.

That is, in the elevator car door drive device according to the fourth aspect, for example, a portion of the connecting member in the right car door that is connected to the belt is located on the front side, and the connecting member in the left car door is The part connected to the belt is located on the rear side.
As a result, even if the belt connecting portion of the connecting member for the left car door is largely displaced toward the right car door, it interferes with the belt connecting portion of the connecting member for the right car door. There is nothing to do.

  ADVANTAGE OF THE INVENTION According to this invention, the door drive device improved so that the clearance with respect to the equipment provided in the top part of the hoistway can be ensured easily can be provided.

Hereinafter, with reference to FIG. 1 thru | or FIG. 7, each embodiment of the elevator car door drive device which concerns on this invention is described.
In the following description, the same parts as those in the prior art described above are denoted by the same reference numerals and redundant description is omitted, and the direction in which the door of the car opens and closes is defined as the left-right direction, and the passenger is in the car. The direction to enter and exit is referred to as the front-rear direction, and the vertical direction is referred to as the up-down direction.

First Embodiment An elevator 100 whose main part is shown in FIG. 1 and FIG. 2 is obtained by changing the door driving device with respect to the conventional elevator shown in FIG. This is the same as that shown in FIG.
Therefore, differences from the conventional elevator shown in FIG. 8 will be described.

The door driving device 20 according to the first embodiment shown in FIGS. 1 and 2 is for opening and closing a pair of left and right car doors 3L and 3R, and is provided above the car door. A hanger case 21 fixed to the frame and extending vertically and horizontally is provided.
The hanger case 21 includes a hoisting machine 9 which is equipment installed at the top of the hoistway when the car 1 further rises beyond a predetermined elevating position corresponding to the uppermost landing floor. In order not to interfere, a notch (recess) 21a capable of receiving the hoisting machine 9 is provided at the left end of the upper portion thereof.
The notch portion 21a has a shape complementary to the shape of the base portion 9a of the hoisting machine 9, and can secure a predetermined clearance with respect to the bottom surface and the right side surface of the base portion 9a. Its dimensions are defined.

A door motor 22 for rotating the right pulley 22 a is fixed to the right end of the hanger case 21.
Further, a left pulley 23 is rotatably supported at a portion adjacent to the right side of the notch portion 21a in the upper portion of the hanger case 21.
An endless belt 24 is wound around the pair of left and right pulleys 22a and 23.

A door rail 25 extending horizontally in the left-right direction is fixed to the lower end of the hanger case 21.
Each hanger roller 26 that rolls on the door rail 25 is rotatably supported by a pair of left and right hangers 27L and 27R respectively connected to upper portions of the pair of left and right car doors 3L and 3R.
Accordingly, the pair of left and right car doors 3L and 3R can smoothly move to the left and right while being suspended from the door rail 25 by the pair of left and right hangers 27L and 27R.

The pair of left and right hangers 27L and 27R are connected to the lower ends of the pair of left and right connecting members 28L and 28R, respectively.
The upper end portion of the left connection member 28L is connected to the lower portion 24L of the endless belt 24, and the upper end portion of the right connection member 28R is connected to the upper portion 24U of the endless belt 24.
Accordingly, when the door motor 22 is rotated in the clockwise direction in the drawing, the pair of left and right car doors 3L and 3R are opened in conjunction with each other.
On the other hand, when the door motor 22 is rotated counterclockwise in the drawing, the pair of left and right car doors 3L and 3R closes in conjunction with each other.

That is, in the door drive device 20 of the elevator 100 whose main part is shown in FIGS. 1 and 2, the concave notch 21 a that can receive the hoisting machine 9 installed at the top of the hoistway is a hanger case 21. It is formed in the left end part of the upper part.
Thereby, even if the car 1 further rises beyond the predetermined lift position, the base portion 9a of the hoisting machine 9 is received inside the concave cutout portion 21a, so that they do not interfere with each other.
Therefore, the clearance between the hoisting machine 9 provided at the top of the hoistway and the door driving device 20 can be secured without increasing the overhead dimension of the elevator 100.
Further, the notch 21a having a concave shape can be easily formed not only in the upper portion of the hanger case 21 but also freely according to the left-right direction position of the hoisting machine 9.

2nd Embodiment Next, with reference to FIG. 3 and FIG. 4, the door drive device of 2nd Embodiment is demonstrated.

In the elevator 100 of the first embodiment described above, the hoisting machine 9 is greatly displaced to the left with respect to the car 1, so that the notch 21a formed in the hanger case 21 is relatively small.
Thereby, the amount of shifting the left pulley 23 to the right according to the notch 21a can be reduced, and the left car door 3L can be opened and closed without changing the shape or mounting position of the connecting member 28L. .

On the other hand, in the elevator 200 whose main part is shown in FIGS. 3 and 4, the position of the hoisting machine 9 with respect to the car 1 is largely shifted to the right side. The concave notch 31a to be formed must also be enlarged.
Accordingly, the amount by which the left pulley 23 is shifted to the right side must be increased in accordance with the notch 31a. If the connecting member 28L shown in FIGS. 1 and 2 is used as it is, the left car door 3L can be moved. When opening, the connecting member 28L interferes with the left pulley 23, and the left car door 3L cannot be fully opened.
Therefore, in the door drive device 30 of the second embodiment, the shape and the mounting position of the connection member 32 for the left car door 3L are changed.

More specifically, among the connecting members 32 for the left car door 3L, the position in the left-right direction of the portion 32a connected to the car door 3L is the same as that of the connecting member 28L shown in FIGS. It is the same.
On the other hand, the position of the connecting member 32 in the left-right direction of the portion 32b connected to the lower portion 24L of the belt 24 is illustrated with respect to the portion 32a of the connecting member 32 connected to the car door 3L. It is greatly shifted to the right.
Thereby, the entire shape of the connecting member 32 is bent in a crank shape when viewed from the front.

That is, in the door driving device 30 of the second embodiment, the position 32b of the connecting member 32 connected to the belt 24 is changed to the right in accordance with the change of the position of the left pulley 23 to the right. .
As a result, as shown in FIG. 4, even if the left car door 3 </ b> L is fully opened, the portion 32 b of the connecting member 32 that is connected to the belt 24 does not interfere with the left pulley 23.
Therefore, even when the position of the hoisting machine 9 is largely shifted to the right side with respect to the car 1, the concave notch 31a formed in the hanger case 31 is further increased, and the hoisting machine 9 and the door driving device 20 are taken. The clearance between the two can be ensured.

3rd Embodiment Next, with reference to FIGS. 5-7, the door drive device of 3rd Embodiment is demonstrated.

In the elevator 300 of the third embodiment whose main parts are shown in FIGS. 5 and 6, the position of the hoisting machine 9 relative to the car 1 is further to the right than that in the elevator 200 of the second embodiment described above. Close to.
Thereby, the concave notch 41a formed in the hanger case 41 of the door drive device 40 is further enlarged.
Therefore, since the amount of shifting the left pulley 23 to the right side is further increased in accordance with the notch 41a, the shape of the connecting member 42 for the left car door 3L must be greatly changed.

Specifically, of the connecting member 42 for the left car door 3L, the position in the left-right direction of the portion 42a connected to the car door 3L is the same as that of the connecting member 28L shown in FIGS. It is the same.
On the other hand, the position of the connecting member 42 in the left-right direction of the portion 42b connected to the lower portion 24L of the belt 24 is further shifted to the right in the drawing with respect to the portion 42a connected to the car door 3L. In the state where the car doors 3L and 3R are closed as shown in FIG. 5, the connecting member 43 for the right car door 3R is overlapped in the front-rear direction.

Accordingly, as shown in FIG. 7, the portion 42 connected to the belt 24 in the connecting member 42 for the left car door 3L and the connecting member 43 for the right car door 3R. The position of the portion 43b connected to the belt 24 is shifted in the front-rear direction (the left-right direction shown in FIG. 7).
As a result, even if the belt connecting portion 42b of the connecting member 42 for the left car door 3L is largely displaced toward the right car door 3R, the connecting member 43 for the right car door 3R is used. Therefore, the pair of left and right car doors 3L and 3R can be reliably opened and closed.

  That is, in the door drive device 40 of the third embodiment, the connecting member 42 for the left car door 3L and the connecting member 43 for the right car door 3R are displaced in the front-rear direction. Even when the hoisting machine 9 is further shifted to the right side with respect to the car 1 because they do not interfere with each other, the concave notch 41a formed in the hanger case 41 is made larger so that the hoisting machine 9 and the door driving device are A clearance of 20 can be ensured.

As mentioned above, although each embodiment of the elevator car door drive device concerning the present invention was described in detail, it cannot be overemphasized that the present invention is not limited by the embodiment mentioned above and various changes are possible.
For example, in each of the embodiments described above, the hoisting machine 9 is located on the left side of the car 1, but it goes without saying that the hoisting machine 9 can be configured in exactly the same manner when it is located on the right side.

The front view which shows the door drive device of 1st Embodiment in a door closed state The front view which shows the door drive device of 1st Embodiment in a door open state The front view which shows the door drive device of 2nd Embodiment in a door closed state The front view which shows the door drive device of 2nd Embodiment in a door open state The front view which shows the door drive device of 3rd Embodiment in a door closed state The front view which shows the door drive device of 3rd Embodiment in a door open state Sectional view along the VII-VII break line in FIG. Perspective view showing a conventional machine roomless elevator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2L, 2R Car side guide rail 3L, 3R Car door 4 Upper beam 5L, 5R Vertical beam 6 Sheave support beam 7L, 7R Car sheave 8 Traction sheave 9 Hoisting machine 10 Hoisting rope 11L, 11R Hitch part 20 Door drive device 21 of first embodiment 21 Hanger case 21a Notch portion 22 Door motor 22a Pulley 23 Pulley 24 Belt 25 Door rail 26 Hanger roller 27L, 27R Hanger 28L, 28R Connecting member 30 Door drive device 31 Second embodiment of the invention Hanger case 31a Notch portion 32 Connecting member 40 Door drive device of the third embodiment 41 Hanger case 41a Notch portion 100 Elevator 200 provided with the door drive device of the first embodiment Elevator 300 provided with the door drive device of the second embodiment of the third embodiment With door drive Elevator

Claims (4)

A door driving device for opening and closing a car door of an elevator,
In order to prevent interference with the equipment installed at the top of the hoistway when the car rises further beyond a predetermined lifting position, a concave part is formed on the upper part to complement the equipment. Elevator car door drive device characterized in that it is. The door driving device is:
It has a hanger case that is fixed above the car door and extends vertically and horizontally,
2. The elevator car door drive device according to claim 1, wherein the concave portion is formed by cutting out an upper portion of the hanger case. 3. The door driving device is:
A pair of left and right pulleys rotatably supported at both left and right ends of the upper portion of the hanger case;
An endless belt wound around these pulleys and extending in the left-right direction;
A connecting member for connecting the belt and the car door;
The pulley is arranged to avoid the concave portion formed in the hanger case,
A portion of the connecting member that is connected to the belt does not come into contact with a pulley that is disposed so as to avoid the concave portion when the car door is open. 3. The elevator car door drive device according to claim 2, wherein the elevator car door drive apparatus is disposed so as to be shifted in a left-right direction with respect to a portion connected to the car door. The car door is composed of a pair of left and right doors,
The connection member is composed of a pair of left and right connection members respectively coupled to the pair of left and right doors;
A portion connected to the belt in the connection member for one of the pair of left and right doors, and a portion connected to the belt in the connection member for the other of the pair of left and right doors in the front-rear direction. Placed in a different position,
The elevator car door drive device according to claim 3.

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