JP2857589B2 - Elevator door drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door driving device.

[0002]

2. Description of the Related Art FIG. 12 is a plan view showing the structure of a conventional elevator door driving device. In FIG. 12, reference numeral 1 denotes a door device frame mounted on an elevator car (not shown);
Is a top plate mounted on the upper part of the door device frame 1, 3 is a beam mounted on the elevator car, 4 is a door rail mounted on the door device frame 1 and has a circular orbit on a horizontal plane. Door 6 configured in an arc-shaped horizontal cross-sectional shape for opening and closing the entrance of the door, 6 is attached to the upper edge of the door 5,
A door hanger 7 suspended from the door rail 4 is a drive link whose one end is rotatably mounted on the beam 3 so as to be rotatable around a center axis A of curvature of an arc track of the door rail 4, and the other end of which is fixed to the door hanger 6. Reference numeral 8 denotes an electric motor for opening and closing the door, which is installed on the top plate 2 so that the rotation shaft 8a rotates around the horizontal axis. Reference numeral 9 denotes an electric motor which is installed on the top plate 2 so that the output shaft 9a rotates around the horizontal axis. The speed reducer 10 is constituted by a gear transmission mechanism for inputting the rotation of the speed reducer 8 and reducing the rotation. The umbrella 10 receives the rotation of the output shaft 9a of the speed reducer 9 around the horizontal axis and converts the rotation into the rotation around the vertical axis. A converter composed of a gear mechanism, 11 is a link fixed at one end to the output shaft of the converter 10 and rotates on a horizontal plane around the output shaft of the converter 10, and 12 is rotatable at one end about a vertical axis. The other end of the link 11 is rotatably mounted on the other end of the link 11 so as to be rotatable about a vertical axis.

Next, the operation of the above-described conventional elevator door driving device will be described. When the electric motor 8 is driven to rotate forward, the rotational torque of the electric motor 8 is transmitted to the speed reducer 9 via the rotating shaft 8a. And the rotational torque of the electric motor 8 is
The speed is reduced by the speed reducer 9 and transmitted to the converter 10 via the output shaft 9a. Therefore, the rotation torque of the electric motor 8 is converted from the rotation torque around the horizontal axis to the rotation torque around the vertical axis. Then, the link 11 fixed to the output shaft of the converter 10 is rotated counterclockwise around the output shaft of the converter 10 as a rotation center. As the link 11 rotates counterclockwise, the center line of the link 12 (both ends of the link 12 and the
Across a link center line (link 11 in a straight line) and a link 11 connecting the connection point between the link 11 and drive link 7 12 Contact
The drive link 7 is rotated about the center axis A of curvature of the circular orbit of the door rail 4 while the angle between the drive link 7 and the straight line connecting the connection point with the output shaft of the converter 10 is widened. Then, the door 5 moves along the arc trajectory of the door rail 4 together with the door hanger 6 fixed to the other end of the drive link 7, and the entrance of the car is opened. Further, by driving the electric motor 8 in the reverse direction, the opening and closing of the car is closed by the operation opposite to the opening operation of the door 5 described above.

[0004]

Since the conventional elevator door driving device is constructed as described above, when the rotational torque of the electric motor 8 is transmitted to the link mechanism as the driving force for opening and closing the door 5, the electric motor 8 is driven. Converter 1 that converts the rotational torque of the rotary shaft 8a around the horizontal axis into the rotational torque around the vertical axis
However, there is a problem that the number of parts increases, which leads to an increase in cost, size, and weight of the device, as well as a decrease in maintainability. In addition, it is difficult to reliably apply the fully-closed holding force for holding the door 5 in the fully-closed state regardless of the driving force of the electric motor 8, and there is a problem that the safety of the user is reduced. Furthermore,
At the time of maintenance and inspection work, there is also a problem that the fully open holding force for holding the door 5 in the open state cannot be reliably obtained regardless of the driving force of the electric motor 8 while the elevator is stopped, and the workability is reduced. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a simplified mechanism for transmitting a driving force for opening and closing a door to reduce cost, size, and weight. An object of the present invention is to obtain an elevator door drive device that improves maintainability. In addition, a mechanism has been added to apply a force to keep the door fully closed during the operation of the elevator, regardless of the driving force of the electric motor, to prevent the door from opening during the operation of the elevator, thereby improving user safety. It is an object of the present invention to provide an elevator door drive that can be raised. In addition, a mechanism has been added to apply a force to the door to keep the door fully open when the elevator is stopped during maintenance and inspection, regardless of the driving force of the motor, preventing the door from opening during maintenance and inspection, and improving workability. It is an object of the present invention to obtain an elevator door drive device capable of improving the door speed.

[0006]

According to a first aspect of the present invention, there is provided an elevator door driving apparatus having a door rail having an arc-shaped track on a horizontal plane, and a door suspended from the door rail to open and close a car entrance. A motor for opening and closing the door disposed at the upper part of the car, a speed reducer for reducing the rotation of the motor, and one end fixed to the door and rotatably disposed about the center axis of curvature of the arc track of the door rail. A drive link, a rotating member that rotates together with the output shaft of the speed reducer, and a drive link rotatable on at least one end on at least two axes orthogonal to each other and on the other end on three axes orthogonal to each other at one point. And a connecting link respectively connected to the rotating member, and a weight is attached to a part of the connecting link and the rotating member.
When the door is fully open, the door fully open holding force is applied.
When the door is in the fully closed state, the door
Those who like to make.

Further, the elevator door driving apparatus according to a second aspect of the present invention is the elevator door driving apparatus according to the first aspect, wherein the door is at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane. The reduction gear is arranged such that the axis of the output shaft of the reduction gear is parallel to the center line of the drive link.

The elevator door driving apparatus according to a third aspect of the present invention is the elevator door driving apparatus according to the second aspect, wherein the door is located at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane. The connecting link is attached so that the center line of the connecting link and the axis of the output shaft of the reduction gear are orthogonal to each other.

[0009]

According to a fourth aspect of the present invention, there is provided an elevator door driving device according to the first aspect, wherein the rotating member is mounted so as to be adjustable in a mounting position along a radial direction of an output shaft of the speed reducer. Is what it is.

According to a fifth aspect of the present invention, in the elevator door driving apparatus according to the first aspect, one end of the drive link is attached to the door so as to be capable of adjusting the attachment position along the arcuate orbit of the door rail. Is what it is.

According to a sixth aspect of the present invention, there is provided an elevator door driving apparatus comprising: a door rail having an arc-shaped orbit on a horizontal plane; and a pair of doors suspended from the door rail for opening and closing a car doorway at a center opening. A door, an electric motor for opening and closing the door arranged at the upper part of the car, a speed reducer for reducing the rotation of the electric motor, and one end fixed to each of the pair of doors, and being rotatable around the center axis of curvature of the arc track of the door rail. , A rotating member that rotates together with the output shaft of the speed reducer, at least one end of the drive link that is orthogonal to each other.
A connecting link connected to one of a pair of driving links and a rotating member so as to be rotatable about an axis and rotatable about three axes orthogonal to each other at one point at the other end, and a vertical axis on the upper part of the car. The first rotatably disposed
A second link having one end rotatably connected to one drive link of the pair of drive links about a vertical axis and the other end rotatably connected to the first link about the vertical axis; A third link having one end connected to the other drive link of the pair of drive links so as to be rotatable around the vertical axis, and the other end connected to the first link so as to be rotatable about the vertical axis. is there.

An elevator door driving apparatus according to a seventh aspect of the present invention is a door driving apparatus having an arc-shaped orbit on a horizontal plane, and a pair of door rails suspended from the door rail to open and close a car doorway at a center opening. A door, an electric motor for opening and closing the door arranged at the upper part of the car, a speed reducer for reducing the rotation of the electric motor, and one end fixed to each of the pair of doors, and being rotatable around the center axis of curvature of the arc track of the door rail. , A rotating member that rotates together with the output shaft of the speed reducer, at least one end of the drive link that is orthogonal to each other.
A first connecting link connected to one of the driving link and the rotating member of the pair of driving links so as to be rotatable about an axis and rotatable about three axes orthogonal to each other at one point at the other end, and at one end, A second connecting link connected to the other driving link and the rotating member of the pair of driving links so as to be rotatable about at least two axes orthogonal to each other and to be rotatable about three axes orthogonal to each other at one point at the other end. It is provided with.

[0014]

In the first aspect of the present invention, the rotational torque of the electric motor is transmitted to the speed reducer, decelerated, and output to the output shaft. Then, the rotation of the output shaft of the reduction gear causes the rotation member to rotate. Further, the rotational torque of the output shaft of the speed reducer is transmitted to the drive link via the rotating member and the connecting link. Therefore, the drive link is rotated around the center axis of curvature of the arc of the door rail, and the door fixed to one end of the drive link moves along the arc of the door rail.
The car doorway is opened and closed. At this time, one end of the connecting portion at both ends of the connecting link is rotatably connected to at least two axes orthogonal to each other, and the other end is rotatably connected to three axes orthogonal to each other at one point. The center line direction of the connecting link at the connecting portions at both ends of the connecting link is three-dimensionally displaced with respect to the driving link and the rotating member, and the rotational torque of the output shaft of the speed reducer is opened and closed by the driving link via the connecting link. Transmitted as force. In addition, articulation
Attach weights to some of the links and rotating members,
When the door is fully open, the door full-open holding force is applied,
When the door is in the closed state, the door fully closed holding force is applied.
The door is fully open and the
And the fully closed holding force is ensured. Therefore, when the car stops,
The door is not opened even if external force acts regardless of the driving of the motive,
Suddenly the door opens and passengers are thrown out of the car doorway
Is prevented. Also, during maintenance and inspection, the door is fully opened.
The state is maintained, the door closes during work, and
I am prevented from doing it.

[0015] In a second aspect of the present invention,
The speed reducer is arranged so that the axis of the output shaft of the speed reducer is parallel to the center line of the drive link when the door is at an intermediate position between the fully open state and the fully closed state on the vertical projection plane. Therefore, the amount of rotation about the vertical axis at the connecting portions at both ends of the connection link when transmitting the rotation torque of the output shaft of the reduction gear to the drive link is reduced.

In a third aspect of the present invention,
When the door is at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane, the connecting link is attached so that the center line of the connecting link and the axis of the output shaft of the reduction gear are orthogonal to each other. In addition, the moving space of the connecting link when transmitting the rotational torque of the output shaft of the speed reducer to the drive link is reduced.

[0017]

In a fourth aspect of the present invention,
Since the rotating member is mounted so that the mounting position can be adjusted along the radial direction of the output shaft of the speed reducer, by adjusting the mounting position of the rotating member, the output shaft radial position of the connecting portion between the rotating member and the connecting link is adjusted. Is adjusted. Therefore, the rotation angle range of the drive link around the center axis of curvature of the arc track of the door rail is adjusted, and the opening and closing movement amount of the door can be adjusted.

In a fifth aspect of the present invention,
One end of the drive link is attached to the door so that the mounting position can be adjusted along the direction of the arc of the door rail. By adjusting the mounting position of the drive link, the direction of the arc of the door rail at the connection between the drive link and the door is adjusted. The position is adjusted and the reference position of the door can be adjusted.

In a sixth aspect of the present invention,
The rotational torque of the motor is transmitted to the speed reducer, decelerated, and output to the output shaft. Then, the rotation of the output shaft of the reduction gear causes the rotation member to rotate. Further, the rotational torque of the output shaft of the speed reducer is transmitted to one drive link via the rotating member and the connecting link. Then, one drive link is rotated about the center axis of curvature of the arc track of the door rail, and one door fixed to one end of the one drive link moves along the arc track of the door rail. At this time, one end of the connecting portion at both ends of the connecting link is rotatably connected to at least two axes orthogonal to each other, and the other end is rotatably connected to three axes orthogonal to each other at one point. among the articulated link in the connection portions at both ends of the connecting link
The center line direction is 3 for one drive link and the rotating member.
The rotational torque of the output shaft of the reduction gear is dimensionally displaced and transmitted to one of the drive links as the door opening / closing drive force via the connection link. Then, the rotational torque of one drive link that rotates about the center axis of curvature of the arc track of the door rail acts on the second link, and rotates the first link about the vertical axis. Further, the rotational torque of the first link about the vertical axis is transmitted to the other drive link via the third link. Then, the other drive link is rotated around the center axis of curvature of the arc of the door rail in the opposite direction to the one drive link, and the other door fixed to one end of the other drive link moves along the arc of the door rail. I do. Therefore, the pair of doors move in opposite directions along the arc of the door rail in conjunction with each other, and the car doorway is opened and closed.

In a seventh aspect of the present invention,
As in the first aspect, the driving force of the electric motor is
The driving force is transmitted as a door opening / closing drive force to one drive link via the rotating member and the first connecting link, and to the other driving link via the speed reducer, the rotating member, and the second connecting link, respectively. At this time, the driving force of the electric motor is transmitted to the pair of drive links so as to rotate the pair of drive links in opposite directions about the center axis of curvature of the arc track of the door rail. Thus, the pair of doors move in opposite directions along the arc of the door rail in conjunction with each other, and the car doorway is opened and closed.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a plan view showing the configuration of an elevator door drive device according to Embodiment 1 of the present invention. In the drawing, the same or corresponding parts as those of the conventional elevator door drive device shown in FIG. And the description is omitted.

In the drawing, reference numeral 13 denotes a speed reducer installed on the top plate 2. The speed reducer 13 has a pulley 13b as a rotating member mounted on an output shaft 13a thereof.
13b are connected by a V-belt 14, and the rotation of the electric motor 8 is input to reduce the speed. Reference numeral 15 denotes a link as a rotating member fixed to the pulley 13b of the speed reducer 13.
Reference numeral 5 rotates in a vertical plane perpendicular to the output shaft 13a with the output shaft 13a as a rotation center along with the rotation of the pulley 13b. 16 is a spherical bearing attached to the end of the link 15, 17 is an L-shaped connecting member attached to the drive link 7, and 18 is a three-axis one end of which is orthogonal to the link 15 via the spherical bearing 16 at one point. Rotatably connected around,
The other end is a connection link rotatably connected to the drive link 7 via a connection member 17 about two axes orthogonal to each other at one point.

Here, the structure of the connecting portion between the link 15 and the connecting link 18 will be described in detail with reference to FIG. The spherical bearing 16 protrudes from the side end of the link 15 in the horizontal direction. On the other hand, one end of the connecting link 18 has a spherical seat 19 having an inner diameter substantially equal to the outer diameter of the spherical bearing 16.
Is fixed. Then, the spherical bearing 16 is mounted on the spherical seat 19.
The spherical seat 19 is mounted on the spherical bearing 16 so as to be housed therein, and the link 15 and the connecting link 18 are connected. Therefore, the connecting links 18 are orthogonal to each other at one point.
It is connected to the link 15 so as to be rotatable around an axis, that is, three-dimensionally. Next, the drive link 7 and the connecting link 18
The configuration of the connecting portion will be described with reference to FIG.
One horizontal side of an L-shaped connecting member 17 is attached to the drive link 7 so as to be rotatable around a vertical axis. A connecting link 18 is connected to the other vertical side of the connecting member 17.
Is mounted rotatably about a horizontal axis.
Therefore, the connecting link 18 is connected to the drive link 7 via a connecting member 17 so as to be rotatable around two axes orthogonal to each other at one point.

Next, the operation of the first embodiment will be described with reference to FIG.
This will be described with reference to FIG. When the motor 8 is driven to rotate forward, the rotational torque of the motor 8 is transmitted to the pulley 13b of the speed reducer 13 via the pulley 8b fixed to the output shaft 8a. At this time, the rotation of the electric motor 8 is reduced according to the diameter ratio between the pulley 8b and the pulley 13b. The rotation of the pulley 13b of the speed reducer 13 causes the link 15 to move as shown in FIG.
(A), the output shaft 13a of the speed reducer 13 is rotated counterclockwise about the center of rotation. This link 15
With the counterclockwise rotation of, a force for pressing the drive link 7 to the left in the drawing acts on the drive link 7 via the connecting link 18.
Then, the drive link 7 is rotated about the center axis A of curvature of the arc track of the door rail 4, and reaches the state shown in FIG. 4C through the state shown in FIG. 4B. Then, as shown in FIG. 5, the door 5 moves along the arc trajectory of the door rail 4 together with the door hanger 6 fixed to the other end of the drive link 7, and the entrance of the car is opened. Further, by driving the electric motor 8 in the reverse direction, the opening and closing of the car is closed by the operation opposite to the opening operation of the door 5 described above.

In the opening / closing operation of the door 5, the spherical bearing 16 rotates on one vertical plane with the output shaft 13a of the speed reducer 13 as the center of rotation. And the link 18
Center line (A series of three axes that are orthogonal to each other at one point.
Connection point between one end of connected link 18 and link 15
(The spherical center of the spherical bearing 16) and two axes orthogonal to each other at one point
The other end of the connecting link 18 rotatably connected around
A straight line connecting the connecting point with the connecting member 17) is a spherical bearing 16
With respect to the center of the sphere, the inclination in the vertical plane changes as shown in FIGS. 4A to 4C, and the inclination in the horizontal plane also changes as shown in FIG. However, at one end of the connecting link 18, the inner circumferential surface of the spherical seat 19 rotates three-dimensionally while sliding on the outer circumferential surface of the spherical bearing 16, while at the other end of the connecting link 18, the vertical The connecting link 18 rotates about the horizontal axis with respect to the appropriate side, and the connecting member 17 rotates about the vertical axis with respect to the drive link 7, so that the above-described behavior of the connecting link 18 is smoothly achieved. .

As described above, according to the first embodiment, the spherical bearing 16 is attached to the end of the link 15 fixed to the pulley 13b of the speed reducer 13, and is connected to the drive link 7 so as to be rotatable around a vertical axis. The member 17 is installed, and the spherical seat 19 attached to one end of the connecting link 18 is mounted on the spherical bearing 16 so that the one end of the connecting link 18 can rotate around three axes orthogonal to each other at one point with respect to the link 15. And the other end of the connecting link 18 is attached to the connecting member 17 so as to be rotatable about a horizontal axis, and the other end of the connecting link 18 is rotated about two axes orthogonal to each other at one point with respect to the drive link 7. When the rotational torque of the electric motor 8 is transmitted to the link mechanism as the driving force for opening and closing the door 5, the rotational torque of the electric motor 8 about the horizontal axis, which is required in the conventional device, is transmitted around the vertical axis. Rotation Converter 10 for converting the click is not required. Therefore, since the converter 10 becomes unnecessary, simplification of the device configuration and reduction in the number of parts can be achieved, and the cost, size, and weight of the device can be reduced, and the maintainability can be improved. Is obtained. Furthermore, the connecting link 18 and the driving link 7
In addition, vibration and noise at the time of torque transmission at the connection portion with the link 15 are reduced, and quality is improved. Further, the components are shared with the linear door drive device, and the cost is reduced accordingly.

In the first embodiment, the connection link 18
And a link 15 are constituted by a spherical bearing 16 and a spherical seat 19 so as to be rotatable about three axes orthogonal to each other at one point.
2 which are composed of a U-shaped connecting member 17 and are orthogonal to each other at one point.
The connecting portion between the connecting link 18 and the link 15 is connected to the L-shaped connecting member 1.
7 and the connecting portion between the connecting link 18 and the drive link 7 is constituted by the spherical bearing 16 and the spherical seat 19, the same effect can be obtained. Also, both the connecting portion between the connecting link 18 and the link 15 and the connecting portion between the connecting link 18 and the drive link 7 are constituted by a spherical bearing 16 and a spherical seat 19, and rotate around three axes orthogonal to each other at one point. They may be connected as much as possible. In the first embodiment, one end of the connecting link 18 is connected to the pulley 13b via the link 15, but one end of the connecting link 18 may be directly connected to the pulley 13b. In this case, the pulley 13b
, A spherical bearing 16 protrudes from the side surface of the connecting member 18, and a spherical seat 19 attached to one end of the connecting link 18 may be attached to the spherical bearing 16.

Embodiment 2 FIG. In the first embodiment, when the door 5 is at the fully closed position, the axial directions of the output shaft 8a of the electric motor 8 and the output shaft 13a of the reduction gear 13 are parallel to the center line of the drive link 7 on the vertical projection plane. The motor 8, the speed reducer 13, and the connecting link 18 are arranged so that the center line of the connecting link 18 is orthogonal to the vertical projection plane. In the second embodiment, as shown in FIG. to, when the door 5 is in the intermediate position B ₃ between the fully closed position B ₁ and the fully opened position B _2, the electric motor 8 with respect to the center line of the drive link 7 output shaft 8a and the speed reducer 13
The axis direction of the output shaft 13a becomes parallel on the vertical projection plane,
The electric motor 8, the speed reducer 13, and the connecting link 18 are arranged such that the center line of the connecting link 18 is orthogonal to the vertical projection plane.
Are arranged and configured.

According to the second embodiment, when the door 5 is in the fully closed position B
When in intermediate position B ₃ of _one and the fully open position B _2, the axial direction of the output shaft 13a of the output shaft 8a and the reduction gear 13 of the motor 8 with respect to the center line of the drive link 7 is parallel on the vertical projection plane Since the electric motor 8 and the speed reducer 13 are arranged and configured so as to be as described above, the amount of rotation at the connecting portions at both ends of the connecting link 18 is reduced. Therefore, the moving space of the connecting link 18 is reduced, the degree of freedom of installation of the device is increased in consideration of interference with other devices, the transmission loss of the driving force in the connecting portion is reduced, and the rotational torque of the electric motor 8 is reduced. Door 5
Can be efficiently transmitted to the drive link 7 as the opening / closing drive force. Furthermore, the door 5 is fully closed position B ₁ fully open position B
When in intermediate position B ₃ and _2, since the center line of the connecting link 18 is disposed constitutes a connecting link 18 so as to be perpendicular on the vertical projection plane with respect to the center line of the drive link 7, the connecting link 18 And the amount of rotation at the connecting portions at both ends of the first member is further reduced. Therefore, the moving space of the connecting link 18 becomes smaller, and the rotational torque of the electric motor 8 can be efficiently transmitted to the driving link 7 as the driving force for opening and closing the door 5.

Embodiment 3 FIG. FIG. 7 is a sectional view of a main part of an elevator door driving device according to a third embodiment of the present invention. Reference numeral 20 denotes a weight provided at one end of the link 15. In the third embodiment, the center line of the link 15 (the mutual
Connected to be rotatable about three axes orthogonal to each other at one point
A connection point between one end of the link 18 and the link 15 (the spherical bearing 1
6) and the output shaft 13 which is the rotation center of the link 15.
vertical line angle theta ₁ next connecting the axial center line) is with respect to the vertical line passing through an axis of the output shaft 13a of a, the center line of the link 15 in the fully open position of the door 5 is passing through the axis of the output shaft 13 so that an angle theta ₂ with respect to the link 15 is a pulley 13
b. Here, the angles θ ₁ and θ ₂ are configured such that 0 ° <θ ₁ <180 ° and 0 ° <θ ₂ <180 °, respectively. The other configuration is the same as that of the first embodiment.

According to the third embodiment, at the fully closed position of the door 5, the load of the weight 20 is applied to the output shaft 13a so as to apply a rotational force in the direction of closing the door 5 (clockwise in the drawing). . Then, regardless of the driving force of the electric motor 8, the speed reducer 1
3 ensures that the fully closed holding force of the door 5 acts on the door 5 and prevents the door 5 from being opened even if an external force acts on the door 5 without driving the electric motor 8 when the car stops. Therefore, an accident in which the door 5 is suddenly opened when the car stops and the passenger is thrown out of the entrance of the car is prevented, and the safety of the elevator is improved. On the other hand, at the fully open position of the door 5, the load of the weight 20 is applied to the output shaft 13a so as to apply a rotational force in the direction of opening the door 5 (counterclockwise direction in the figure). And, the full open holding force of the door 5 acts on the speed reducer 13 irrespective of the driving force of the electric motor 8, thereby preventing the door 5 from being closed naturally during maintenance and inspection. Therefore, at the time of maintenance and inspection, it is possible to prevent accidents such as working while holding down the door 5, injuring an operator by hitting the closed door 5, and falling into the hoistway, and improving the workability of elevator maintenance and inspection. In addition, safety is improved.

In the third embodiment, the weight 20
By adjusting the mass and the mounting dimension L, the fully closed holding force and the fully open holding force of the door 5 can be arbitrarily set.

In the third embodiment, the weight 20 is attached to the link 15 fixed to the pulley 13b. However, the weight 20 may be attached to other than the link 15, for example, attached to the pulley 13b or the connecting link 18. You may.

Embodiment 4 FIG. FIG. 8 is a diagram showing a main part of an elevator door driving device according to a fourth embodiment of the present invention. FIG. 8A is a front view showing a connecting portion between a door hanger 6 and a driving link 7, and FIG. (B) is a pulley 13b and a link 15
It is a front view which shows the connection part with this. In the figure, reference numeral 21 denotes an elongated slot formed in the door hanger 6 in the horizontal direction, 22 denotes a fastening bolt for fastening the drive link 7 to the door hanger 6, and 23 denotes an elongated hole formed in the pulley 13b in the radial direction. Reference numeral 24 denotes a fastening bolt for fastening the link 15 to the pulley 13b. The other configuration is the same as that of the first embodiment.

In the fourth embodiment, the drive link 7 is attached to the door hanger 6 by fastening the fastening bolt 22 inserted into the elongated hole 21 to the screw hole provided in the link 7. Therefore, since the longitudinal direction of the elongated hole 21 coincides with the horizontal direction, by loosening the fastening bolt 22, the connecting position of the drive link 7 and the door hanger 6 in the horizontal direction (the direction of the circular orbit of the door rail 4) is simplified. And the reference position of the door 5 can be easily adjusted. Further, a fastening bolt 24 inserted into the elongated hole 23 is fastened to a screw hole provided in the link 15 and the link 15 is attached to the pulley 13b. Therefore, since the longitudinal direction of the elongated hole 23 coincides with the radial direction of the pulley 13b, by loosening the fastening bolt 24, the radial projection amount of the link 15 from the pulley 13b can be easily adjusted. The amount of movement can be easily adjusted. Therefore, according to the fourth embodiment, the reference position and the movement amount of the door 5 can be easily adjusted, and the labor of installation adjustment and maintenance adjustment can be reduced.

Embodiment 5 FIG. FIG. 9 is a plan view showing an elevator door driving device according to Embodiment 5 of the present invention. In the drawing, reference numeral 5a denotes a circular arc-shaped horizontal cross-sectional shape that opens and closes the entrance of a car with a center opening together with the door 5. Door,
A door hanger 6a is attached to the upper edge of the door 5a, and is suspended from the door rail 4. One end of the door hanger 7a is rotatably mounted on the beam 3 so as to be rotatable around the center axis A of curvature of the arc track of the door rail 4. The other end is a door hanger. A drive link fixed to 6a. A pair of drive links 7, 7a is a center line connecting the contact surfaces of the pair of doors 5, 5a and the center axis A of curvature of the arc track of the door rail 4 in the fully closed state. It is arranged symmetrically with respect to X in the figure. 30 is a beam fixed to the elevator car, 3
Reference numeral 1 denotes a first link in the shape of a square which is rotatably mounted on the beam 30 about a vertical axis C located on the center line X, and 32 is a shaft whose one end is rotatable about the vertical axis D on the drive link 7. Dressed,
The other end of the second link 33 is rotatably mounted on the drive link 7a about the vertical axis F. The other end of the second link 33 is rotatably mounted on the drive link 7a. Is the first
A third link is rotatably mounted on the other end of the link 31 so as to be rotatable around a vertical axis G. The other configuration is the same as that of the first embodiment.

Next, the operation of the fifth embodiment will be described. When the motor 8 is driven to rotate forward, the rotational torque of the motor 8 is transmitted to the pulley 13b of the speed reducer 13 via the pulley 8b fixed to the output shaft 8a. And, reducer 1
The rotation of the pulley 13b causes the link 15 to move the speed reducer 1
3 is rotated about the output shaft 13a as the center of rotation. As the link 15 rotates, a force for pressing the drive link 7 to the left in the drawing acts on the drive link 7 via the connecting link 18. Then, the drive link 7 is rotated clockwise in the figure around the center axis A of curvature, and the door 5 is moved leftward along the arc of the door rail 4 together with the door hanger 6 fixed to the other end of the drive link 7. Moving. The rotation of the drive link 7 about the center axis of curvature A as the rotation center causes the second link 3
2 moves to the left in the figure. Due to the movement of the second link 32, the first link 31 rotates counterclockwise in the figure about the vertical axis C as the center of rotation. Further, the first link 3
By the counterclockwise rotation of No. 1, the third link 33 moves rightward in the figure, and the drive link 7a is rotated counterclockwise in the figure around the center axis A of curvature. Therefore, the drive link 7a
The door 5a together with the door hanger 6a fixed to the other end of the
The door rail 4 moves rightward in the figure along an arc trajectory. The pair of doors 5, 5a are respectively
It moves left and right in the figure in conjunction with the circular arc trajectory to open the doorway of the car. Further, by driving the electric motor 8 in the reverse direction, the opening and closing of the car is closed by the operation opposite to the opening operation of the pair of doors 5 and 5a.

According to the fifth embodiment, the spherical bearing 16 is attached to the end of the link 15 fixed to the pulley 13b of the speed reducer 13.
A connecting member 17 is installed on the drive link 7 so as to be rotatable around a vertical axis, and a spherical seat 19 attached to one end of the connecting link 18 is mounted on the spherical bearing 16 to link one end of the connecting link 18. 15 to one another so as to be rotatable about three axes orthogonal to each other at one point.
8 is rotatably attached to the connecting member 17 about a horizontal axis and the other end of the connecting link 18 is rotatably connected to the drive link 7 about two axes orthogonal to each other at one point. The same effects as those of the first embodiment can be obtained. Further, a pair of doors 5, 5a are suspended from the door rail 4 via the door hangers 6, 6a, and one end of each of the door hangers 6, 5a.
A pair of drive links 7 and 7a fixed to 6a are rotatably arranged around a center axis A of curvature of the arc track of the door rail 4, and are mounted on the beam 30 so as to be rotatable around a vertical axis C on the center line X. Since the pair of drive links 7 and 7a are connected by the second and third links 32 and 33 via the first link 31 provided, a pair of drive devices of the electric motor 8 and the speed reducer 13 form a pair. Doors 5 and 5a can be driven to open and close, and a door drive device with a central configuration of an elevator can be obtained which has a simple configuration and can be reduced in size and weight.

Embodiment 6 FIG. FIG. 10 is a plan view showing an elevator door driving device according to Embodiment 6 of the present invention, and FIG. 11 is a sectional view taken along the line XI-XI in FIG. In the sixth embodiment, the electric motor 8 is disposed on the top plate 2 such that the axis of the output shaft 8a is horizontal. Then, the reduction gear 13 is disposed on the top plate 2 such that the axis of the output shaft 13a is horizontal and coincides with the center line X. Further, on the output shaft 13a,
A pulley 13b is fixed on the same vertical plane as the pulley 8b fixed to the output shaft 8a. Also, a pair of doors 5, 5a
Door rails 4 having arcuate tracks via door hangers 6 and 6a so that the entrance of the car can be opened centrally.
Suspended. And a pair of drive links 7,
7a is pivotally mounted at one end to the beam 3 so as to be rotatable around the center axis A of curvature of the arc track of the door rail 4, and the other end is fixedly attached to the door hangers 6, 6a, respectively. These drive links 7, 7a are arranged symmetrically with respect to a center line X connecting the contact surfaces of the doors 5, 5a in the fully closed state and the center axis A of curvature of the arc track of the door rail 4. I have. Further, the pulley 13b has a pair of links 1
5 and 15a extend radially opposite each other about the axis of the output shaft 13a, and have spherical bearings 1 at their ends.
6, 16a are attached. Further, a pair of L-shaped connecting members 17 and 17a are attached to the pair of drive links 7 and 7a so as to be rotatable around a vertical axis, respectively.
Then, a pair of connecting links 18 and 18a are mounted on the spherical bearings 16 and 16a of the links 15 and 15a at one ends via the spherical seats 19 and 19a, respectively, and are rotatable around three axes orthogonal to each other at one point. Connect the other end to each connecting member 1
The drive links 7 and 7a are rotatably connected to the drive links 7 and 7a through two axes that are orthogonal to each other at one point. In addition,
The connecting link 18 corresponds to a first connecting link, and the connecting link 18a corresponds to a second connecting link.

Next, the operation of the sixth embodiment will be described. When the motor 8 is driven to rotate forward, the rotational torque of the motor 8 is transmitted to the pulley 13b of the speed reducer 13 via the pulley 8b fixed to the output shaft 8a. And, reducer 1
The rotation of the third pulley 13b causes the links 15 and 15a to rotate about the output shaft 13a of the speed reducer 13 as a rotation center. With the rotation of the links 15 and 15a, a force pressing the drive link 7 in the left direction in the drawing acts on the drive link 7 via the connecting link 18 and the drive link 7a via the connecting link 18a.
Is applied to the right side in the figure. Then, the drive link 7 is rotated clockwise in FIG.
The drive link 7a is rotated around the center axis A of curvature in the counterclockwise direction in the figure. The door 5 moves together with the door hanger 6 fixed to the other end of the drive link 7 to the left in the drawing along the circular arc trajectory of the door rail 4, and the door 5a moves together with the door hanger 6a fixed to the other end of the drive link 7a. Moves along the arcuate path of the door rail 4 to the left in the figure, and the entrance of the car is opened. Further, by driving the electric motor 8 in the reverse direction, the opening and closing of the car is closed by the operation opposite to the opening operation of the pair of doors 5 and 5a.

According to the sixth embodiment, the pair of doors 5, 5a
Is suspended from the door rail 4 via the door hangers 6 and 6a, and a pair of drive links 7 and 7a having one ends fixed to the door hangers 6 and 6a, respectively, are rotatably disposed around the center axis A of curvature of the circular orbit of the door rail 4. The link 1 is connected to the pulley 13b of the speed reducer 13 in a point-symmetrical manner with respect to the output shaft 13a.
5 and 15a are fixedly mounted, spherical bearings 16 and 16a are attached to respective ends of the links 15 and 15a, and connecting members 17 and 17a are installed on each of the drive links 7 and 7a so as to be rotatable around a vertical axis. Spherical seats 19, 19a attached to the respective one ends of the connecting links 18, 18a are mounted on the spherical bearings 16, 16a to connect the connecting links 18, 18a.
Are rotatably connected to the links 15 and 15a at three points orthogonal to each other at one point, and the other ends of the connecting links 18 and 18a are connected to the connecting member 1 respectively.
7 and 17a so as to be rotatable about a horizontal axis, and connect the other ends of the connecting links 18 and 18a to the drive links 7 and 7a, respectively.
a is rotatably connected around two axes orthogonal to each other at one point, the same effect as in the first embodiment can be obtained, and a pair of driving devices of the electric motor 8 and the speed reducer 13 make a pair of driving devices. It is possible to open and close the doors 5 and 5a, to obtain a door drive device with a central opening of an elevator, which has a simple configuration, reduces costs, reduces size and weight, and improves maintenance.

In each of the above embodiments, the drive link 7,
One end of the drive link 7 is attached to the door hanger 6, 6a, but one end of the drive link 7, 7a is attached to the door 5, 5a.
It may be directly attached to.

In each of the above embodiments, the spherical bearing 16 is provided at the end of the link 15, the spherical seat 19 is provided at one end of the connecting link 18, and the spherical bearing 19 is mounted on the spherical bearing 16 to connect with the link 15. The link 18 and the link 18 are rotatably connected about three axes orthogonal to each other at one point. However, the connecting portion is not limited to the configuration including the spherical bearing 16 and the spherical seat 19, but is orthogonal to each other at one point. Any configuration may be used as long as it is rotatable around three axes, that is, three-dimensionally rotatable.

In each of the above embodiments, the circular doors 5 and 5a each having an arcuate horizontal cross section are used. However, the doors are formed so that the horizontal cross section becomes substantially arcuate. The same effect can be obtained by using a door.

[0046]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, a door rail having an arc-shaped orbit on a horizontal plane, a door suspended from the door rail to open and close a car entrance, and a door opening and closing provided at an upper part of the car An electric motor, a speed reducer for reducing the rotation of the electric motor, a drive link fixed at one end to the door and arranged rotatably around the center axis of curvature of the arcuate orbit of the door rail, and an output shaft of the speed reducer. A rotating member that rotates, and a connecting link that is connected to the drive link and the rotating member at one end so as to be rotatable about at least two axes orthogonal to each other and at the other end to be able to rotate about three axes orthogonal to each other at one point. With connecting link and part of rotating member
Attach weights and fully open the door when the door is fully open
Apply the holding force to keep the door fully closed when the door is fully closed
When the torque is transmitted to the link mechanism as the opening / closing drive force of the door,
A converter that converts the rotational torque of the electric motor around the horizontal axis into the rotational torque around the vertical axis, which was required in the conventional equipment, is no longer necessary, which simplifies the equipment configuration and reduces the number of parts. , The size and weight can be reduced, the maintainability can be improved , and the driving force of the motor when an external force acts on the door
Doors remain fully closed even if there is no
The motor can be driven during maintenance and inspection.
Even if there is no force, the door is fully open and maintenance work is easy.
Door drive device for an elevator which can Ru can be improved is obtained.

According to a second aspect of the present invention, in the first aspect, the center line of the drive link when the door is at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane. On the other hand, since the speed reducer is disposed so that the axis of the output shaft of the speed reducer is parallel, the amount of rotation at the connecting portions at both ends of the connecting link is reduced, and the moving space of the connecting link is reduced, In consideration of interference with other devices, the degree of freedom of installation of the device is increased, the transmission loss of the driving force at the connecting portion is reduced, and the rotational torque of the motor is efficiently transmitted to the drive link as the door opening / closing driving force. be able to.

According to a third aspect of the present invention, in the second aspect, when the door is at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane, the center of the link is connected.
Since the connecting link is mounted so that the line and the axis of the output shaft of the reduction gear are orthogonal to each other, the amount of rotation at the connecting portions at both ends of the connecting link is further reduced, and the moving space of the connecting link is further reduced. In addition, the rotational torque of the electric motor can be efficiently transmitted to the drive link as the door opening / closing driving force.

[0050]

According to the fourth aspect of the present invention, in the first aspect, the rotating member is mounted so as to be adjustable along the radial direction of the output shaft of the speed reducer. By adjusting the mounting position, the rotation angle range of the drive link is adjusted, so that the amount of movement of the door can be easily adjusted, and maintenance adjustment can be saved.

According to the fifth aspect of the present invention, in the first aspect of the present invention, one end of the drive link is attached to the door so that the attachment position can be adjusted along the direction of the circular orbit of the door rail. The reference position of the door can be easily adjusted by adjusting the mounting position of the link, and the labor for installation adjustment can be reduced.

According to the sixth aspect of the present invention, a door rail having an arc-shaped orbit on a horizontal plane, a pair of doors suspended from the door rail to open and close a car entrance at a center opening, and A motor for opening and closing the door, a speed reducer for reducing the rotation of the motor, and one end fixed to each of the pair of doors and rotatably disposed about the center axis of curvature of the arcuate orbit of the door rail. A pair of drive links,
A rotating member that rotates with the output shaft of the speed reducer; one end of one of a pair of drive links rotatable about at least two axes orthogonal to each other at one end and rotatable about three axes orthogonal to each other at one point at the other end; A connecting link connected to the driving link and the rotating member, a first link disposed on the upper part of the car so as to be rotatable about a vertical axis, and one end of which is connected to one driving link of the pair of driving links about the vertical axis. A second link rotatably connected and the other end rotatably connected to the first link about a vertical axis; and a second link rotatably connected to the other drive link of the pair of drive links about the vertical axis. Since the other end is provided with the third link rotatably connected to the first link about a vertical axis, the pair of doors can be opened and closed by a set of driving devices including the electric motor and the speed reducer,
An elevator door drive device with a center opening, which achieves simplification of the device configuration, reduction in cost, size and weight, and improvement in maintainability, is obtained.

According to the seventh aspect of the present invention, a door rail having an arc-shaped orbit on a horizontal plane, a pair of doors suspended from the door rail to open and close a car entrance at a center opening, A motor for opening and closing the door, a speed reducer for reducing the rotation of the motor, and one end fixed to each of the pair of doors and rotatably disposed about the center axis of curvature of the arcuate orbit of the door rail. A pair of drive links,
A rotating member that rotates with the output shaft of the speed reducer; one end of one of a pair of drive links rotatable about at least two axes orthogonal to each other at one end and rotatable about three axes orthogonal to each other at one point at the other end; A first connecting link respectively connected to the drive link and the rotating member, and a pair of one end rotatable about at least two axes orthogonal to each other at one end and rotatable about three axes orthogonal to each other at one point at the other end. Since the driving link includes the other driving link of the driving link and the second connecting link connected to the rotating member, the same effect as the seventh aspect of the invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a configuration of an elevator door driving device according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing one end side connection portion of a connection link in the elevator door drive device according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing the other end side connection portion of the connection link in the elevator door drive device according to the first embodiment of the present invention.

FIG. 4 is a fragmentary cross-sectional view for explaining the operation of the elevator door drive device according to the first embodiment of the present invention.

FIG. 5 is a main part plan view for explaining the operation of the elevator door drive device according to the first embodiment of the present invention;

FIG. 6 is a plan view illustrating a configuration of an elevator door driving device according to a second embodiment of the present invention.

FIG. 7 is an essential part cross-sectional view showing an elevator door drive device according to Embodiment 3 of the present invention.

FIG. 8 is a configuration diagram illustrating an elevator door driving device according to a fourth embodiment of the present invention.

FIG. 9 is a plan view showing a configuration of an elevator door driving device according to Embodiment 5 of the present invention.

FIG. 10 is a plan view showing a configuration of an elevator door drive device according to Embodiment 6 of the present invention.

11 is a sectional view taken along the line XI-XI in FIG. 10;

FIG. 12 is a plan view showing a configuration of a conventional elevator door driving device.

[Explanation of symbols]

4 door rail, 5, 5a door, 7, 7a drive link, 8 electric motor, 13 reducer, 13a output shaft, 13b
Pulley (rotating member), 15, 15a Link (rotating member), 18 Articulated link (first articulated link), 18a
Articulated link (second articulated link), 20 weights, 3
1 1st link, 32 2nd link, 33 3rd link, A central axis of curvature, C vertical axis.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken Sho 49-6925 (JP, Y1) Jikken 46-33287 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66B 13/08

Claims (7)

(57) [Claims] 1. A door rail having an arc-shaped orbit on a horizontal plane, a door suspended from the door rail to open and close a car entrance and exit, an electric motor for opening and closing the door disposed on an upper part of the car, and rotation of the electric motor A speed reducer, a drive link having one end fixed to the door and rotatably disposed around a center axis of curvature of an arc track of the door rail, and a rotating member that rotates together with an output shaft of the speed reducer. A connecting link connected to the drive link and the rotating member so as to be rotatable about at least two axes orthogonal to each other on one end side and rotatable about three axes orthogonal to each other at one point on the other end side ; Articulated link and part of the rotating member
Attach a weight to the door when the door is fully open.
When a fully open holding force is applied and the door is in a fully closed state,
A door driving device for an elevator, wherein a door full closing holding force is applied . 2. The apparatus according to claim 1, wherein the axis of the output shaft of the speed reducer is parallel to the center line of the drive link when the door is at an intermediate position between the fully opened state and the fully closed state on the vertical projection plane. 2. The elevator door driving device according to claim 1, further comprising a speed reducer. 3. When the door is at an intermediate position between a fully opened state and a fully closed state on a vertical projection plane, the connection is established such that the center line of the connection link and the axis of the output shaft of the speed reducer are orthogonal to each other. 3. The elevator door driving device according to claim 2, wherein a link is attached. 4. The elevator door driving device according to claim 1, wherein the rotating member is mounted so as to be able to adjust a mounting position along a radial direction of an output shaft of the speed reducer. 5. The elevator door driving device according to claim 1, wherein one end of the driving link is mounted on the door so that the mounting position can be adjusted along the direction of the arc of the door rail. 6. A door rail having an arc-shaped orbit on a horizontal plane, a pair of doors suspended from the door rail to open and close a car entrance at a center opening, and a motor for opening and closing the door disposed at an upper part of the car. A speed reducer for reducing the rotation of the electric motor, a pair of drive links each having one end fixed to the pair of doors and rotatably disposed around a center axis of curvature of an arc track of the door rail; A rotating member that rotates together with the output shaft of one of the pair of drive links, one end of which is rotatable about at least two axes orthogonal to each other, and the other end of which is rotatable about three axes orthogonal to each other at one point. A link that is connected to the link and the rotating member, a first link that is disposed on the upper part of the car so as to be rotatable around a vertical axis, and one end of one end of the pair of drive links. A second link rotatably connected to the first link and rotatably connected to the first link about the vertical axis, and one end to the other drive link of the pair of drive links. An elevator door driving device, comprising: a third link rotatably connected around a vertical axis; and a third link having the other end connected to the first link rotatably about a vertical axis. 7. A door rail having an arc-shaped orbit on a horizontal plane, a pair of doors suspended from the door rail to open and close a car entrance at a center opening, and an electric motor for opening and closing the door disposed at an upper part of the car. A speed reducer for reducing the rotation of the electric motor, a pair of drive links each having one end fixed to the pair of doors and rotatably disposed around a center axis of curvature of an arc track of the door rail; A rotating member that rotates together with the output shaft of one of the pair of drive links, one end of which is rotatable about at least two axes orthogonal to each other, and the other end of which is rotatable about three axes orthogonal to each other at one point. A first connecting link connected to the link and the rotating member, respectively, and rotatable on at least one end at least about two axes orthogonal to each other, and at the other end, about three axes orthogonal to each other at one point. An elevator door driving device, comprising: a second driving link rotatably connected to the other driving link of the pair of driving links; and a second connecting link respectively connected to the rotating member.