JP2000344450A - Elevator equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a beam for installing a turning sheave at a lower portion of a car from being greatly extended to the car, and to prevent the beam from being subjected to an excessive bending force. A car that moves up and down along car guide rails (2a, 2b) provided on the inner wall surface of a hoistway, and a counterweight guide rail (4a) provided on the back side of the car (3) with respect to the landing. A counterweight 5 that moves up and down along 4b, a turning sheave 7 that is disposed at the top of the hoistway and changes the direction of a hoisting rope 12 that suspends the counterweight and a car on both sides, and the hoisting rope. A traction sheave 10 that is wound and rotated by a motor, and the hoisting rope passes through the lower part of the car through two turning sheaves 11a and 11b provided below the car. In the elevator apparatus suspended by the elevator, the turning sheave 7 disposed at the top of the hoistway is moved up and down on the rear side of the car by turning the turning sheave. It was placed so as to be oblique to the inner wall surface 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope hoist type elevator apparatus, and more particularly to an elevator apparatus which does not require a machine room.

[0002]

2. Description of the Related Art Generally, in an elevator apparatus,
A car and a counterweight are arranged in the hoistway so as to be able to move up and down, and a hoist is installed in a machine room defined at the top of the hoistway, and a hoisting rope connecting the car and the counterweight is provided. The hoist is wound around a traction sheave, and the hoist is driven to raise and lower a car and a counterweight via a hoisting rope.

[0003] However, such an elevator apparatus has a problem that the appearance of the building is impaired and the cost for continuous installation is high because the machine room is constructed on the roof. In some places, sunshine rights can be a problem.

[0004] In view of this, there have been proposed many elevator devices which do not require a machine room. In particular, a device in which a hoisting machine is installed in a counterweight to eliminate the machine room has already been proposed (JP-A-6-255959). No., JP-A-7-13
No. 7963, JP-A-7-137964, JP-A-9-19-1
24259). FIG. 7 is a view showing a motor provided with a traction sheave constituting a hoisting machine inside a counterweight. In the hoistway 1, car guide rails 2a and 2b are provided on the inner wall surface thereof. The car 3 can be moved up and down along the car guide rails 2a and 2b. Further, counterweight guide rails 4a and 4b are provided between the rear surface of the car 3 and the inner wall surface of the hoistway with respect to the landing of the elevator device, and the counterweight guide rails 4a and 4b are attached to the guide rails 4a and 4b. The counterweight 5 can be raised and lowered. In FIG. 7, the plane including the guide rails 2a and 2b for the car and the plane including the guide rails 4a and 4b for the counterweight are developed and illustrated on the same plane.

[0005] A sheave beam 6 is attached to the top end of the guide rail 2a for the car and the weight guide rail 4a so as to straddle the guide rail 2b. A turning sheave 7 is disposed on the sheave beam 6. Further, a traction sheave 10 that is rotationally driven by a driving motor 8 via a belt 9 is provided in the counterweight 5. On the other hand, on the bottom surface side of the car 3, two turning sheaves 11a and 11b are provided on a line inclined with respect to a center line extending in the left-right direction of the bottom surface. By the way, the car 3 and the counterweight 5 are balanced via a hoisting rope 12. That is, one end of the hoisting rope 12 is fixed by the rope hitch 13 near the uppermost portion of the counterweight guide rail 4b, suspended downward, wound around the traction sheave 10 provided on the counterweight 5, and lifted upward. It is extended and wound around the turning sheave 7. The hoisting rope 12 turned by the turning sheave 7 extends downward and reaches the car 3, passes under the car 3 again through the turning sheaves 11 a and 11 b, and extends upward again, and its tip is near the top of the hoistway 1. Is fixed to a rope hitch 14 provided in the vehicle.

[0006]

However, in such an elevator apparatus, the plane perpendicular to the rotation axis of the turning sheave provided at the upper part of the hoistway, that is, the rotating surface, is the wall surface on the rear side of the car in the hoistway. Therefore, if one tries to bring one end of the turning sheave at the bottom of the car directly below the turning sheave, it is necessary to make the car greatly extend the beam for installing the turning sheave at the bottom of the car. is there. Therefore, the mass point of the car and the action point for lifting the car are greatly shifted,
There is a problem that a bending force is generated in the beam for fixing the turning sheave at the lower part of the car.

In view of the above, the present invention does not require a beam for installing the diverting sheave at the lower part of the car to be greatly extended to the car, and an excessive bending force acts on the beam. It is an object of the present invention to obtain an elevator device that can prevent the occurrence of an elevator.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a car and a platform which move up and down along a guide rail for a car provided on an inner wall surface of a hoistway. The direction of the hoisting rope that moves up and down along the counterweight guide rail provided on the back side of the car and the hoisting rope that is arranged at the top of the hoistway and suspends the car and the counterweight on both sides And a traction sheave on which the hoisting rope is wound and driven to rotate by a motor, wherein the car is below the car via two turning sheaves provided at the lower part of the car. In the elevator device suspended by the hoisting rope passed through, the turning sheave arranged at the top of the hoistway, the rotating surface of the turning sheave, the rotation surface of the car Characterized by being installed such that obliquely to the hoistway wall surface side.

According to a second aspect of the present invention, in the first aspect of the present invention, the traction sheave is provided inside the counterweight.

According to a third aspect of the present invention, in the first aspect of the present invention, the traction sheave is provided at a lower portion of the car.

Further, the invention according to claim 4 is the same as the invention according to claim 3.
In the described invention, at least one deflecting sheave is provided on the counterweight, and the counterweight is suspended by a hoisting rope wound around the deflecting sheave.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawing, the same parts as those in FIG. 7 are denoted by the same reference numerals.

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged view showing a vicinity of a turning sheave at the top of a hoistway. The guide rails 2 for the car are respectively provided on the left and right inner wall surfaces of 1.
a, 2b are laid in the vertical direction, the car 3 is engaged with the guide rails 2a, 2b, and the car 3 moves up and down along the guide rails 2a, 2b. It is.

On the other hand, a pair of counterweight guide rails 4a and 4b are provided upright between the rear side of the landing of the car 3 and the inner wall 1a of the hoistway facing the same, and the counterweight is provided. The counterweight 5 is engaged with the guide rails 4a and 4b, and the counterweight 5 is configured to move up and down along the counterweight guide rails 4a and 4b.

A beam 15 is provided on the lower surface of the car 3 so as to extend in a direction inclined with respect to the center line L (FIG. 2) of the car 3 in the left-right direction. 11a and 11b are attached. A traction sheave 10 that is driven to rotate by a motor 16 is provided in the counterweight 5.

The car 3 and the counterweight 5 are balanced by a hoisting rope 12, and one end of the hoisting rope 12 is balanced by a guide rail 4 for the weight.
b, which is fixed by the rope hitch 13 near the top and hung downward, wound around the traction sheave 10 provided on the counterweight 5, extends upward, and is turned near the top of the hoistway 1. It is wound around the sheave 7. The hoisting rope 12 turned by the turning sheave 7 extends downward to reach the car 3 and is turned by the turning sheaves 11a, 11a.
The upper end of the hoistway 1 is fixed to a rope hitch 14 provided near the top of the hoistway 1 through the lower portion of the car 3 and extending upward again through the car b.

When the traction sheave 10 is rotated by the motor 16, the car 3 and the counterweight 5 are driven up and down in opposite directions via the hoisting rope 12.

The above structure is almost the same as that shown in FIG. 7, but in the present invention, the turning sheave 7 at the top is
A plane orthogonal to the rotation axis of the turning sheave 7, that is, a rotation surface is installed obliquely with respect to the inner wall surface 1 a of the hoistway facing the rear surface of the car 3, and as shown in FIGS. 2 and 3,
One end of the turning sheave 7 at the top is on the same vertical line as one end of the turning sheave 11 b of the car 3, and the other end of the turning sheave 7 is on the same vertical line as one end of the traction sheave 10.

Therefore, the turning sheave 1 at the lower part of the car
One end of a beam 15 provided with 1a, 11b is greatly extended from the car 3 and a turning sheave 1 provided at a tip end thereof.
1b need not be located in the same vertical plane as the turning sheave 7 and the traction sheave 10 at the top,
Hoisting ropes 12 extending downward from both sides of the turning sheave 7
Can be hung at the engagement position with the turning sheave 11b or the traction sheave 10, and the winding and operation of the hoist rope 12 can be reliably performed. That is, in the embodiment of the present invention, the beam for installing the turning sheave at the lower part of the car does not need to be largely extended outwardly of the car 3 by the above configuration, and the bending force acts on the beam more than necessary. Can be prevented. Moreover, the space between the hoistway wall on the back side of the car and the car as viewed from the platform can be used effectively, saving space in the hoistway and the traction sheave inside the counterweight. The position in the depth direction can be set freely.

FIGS. 4 and 5 show another embodiment of the present invention, in which a motor 16 is mounted on the lower portion of the car 3, that is, on the lower surface side of the bottom plate, and a traction sheave mounted on the motor 16 is shown. One end of the hoisting rope 12 is wound around the hoisting rope 10 by one turn, is turned by a turning sheave 11 a, extends upward, and is fixed to a rope hitch 14. On the other hand, the other end of the hoisting rope 12 is turned upward by the turning sheave 11b, extends upward, and
The turning sheaves 17a, 17b provided at the top end of the counterweight 5 are turned downward again by the turning sheave 7 at the top of the counterweight.
, And is fixed to the rope hitch 13.

In this case, too, the car 3 and the counterweight 5 can be raised and lowered via the hoisting rope 12 by rotating the traction sheave 10 by the motor 16, and the turning sheave 7 at the top can be lifted and lowered. By arranging the rotating surface so as to be inclined with respect to the inner wall surface 1a of the hoistway, the same operation and effect as in the embodiment shown in FIG. 2 can be obtained.

As described above, in the present embodiment, by providing the motor for rotating and driving the traction sheave 10 at the lower part of the car, the restriction on the outer dimensions of the motor can be eased.

The two turning sheaves 17a and 17b provided on the counterweight 5 are disposed on a plane parallel to the hoistway inner wall surface 1a similarly to the counterweight 5.
The hoisting rope 12 extending upward from the two diverting sheaves 17a and 17b can be extended vertically toward the rope hitch 14 or one end of the diverting sheave 7, so that the counterweight can be suspended in a right-left balance.

Further, in the above-described embodiment, the two counter sheaves 17a and 17b are provided on the counterweight 5, but as shown in FIG. 6, one turning sheave 17 is provided.
Only one may be provided.

[0025]

As described above, the present invention relates to a turning sheave which is disposed at the top of a hoistway and changes the direction of a hoisting rope which suspends a car and a counterweight on both sides,
A traction sheave, on which the hoisting rope is wound and driven to rotate by a motor,
In an elevator apparatus suspended by a hoisting rope passed under the above-mentioned car through two turning sheaves provided at a lower part thereof, a turning sheave arranged at a top of a hoistway is turned by the turning. Since the rotating surface of the sheave is installed so as to be oblique to the inner wall of the hoistway on the back side of the car, there is no need to protrude one end of the beam that provides the turning sheave at the bottom of the car from the car. In addition, it is possible to prevent the bending force from acting on the beam more than necessary. In addition, when the traction sheave is arranged under the counterweight or the lower part of the car, the space between the hoistway wall on the rear side of the car and the car when viewed from the platform can be effectively utilized, Space saving can be realized. Further, when the traction sheave is installed below the car, it is possible to reduce the restrictions on the outer dimensions of the motor driving the traction sheave.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an elevator apparatus according to the present invention.

FIG. 2 is a plan view showing a schematic configuration of the elevator apparatus of the present invention.

FIG. 3 is an enlarged view of a turning sheave at the top in FIG. 2;

FIG. 4 is a plan view showing another embodiment of the present invention.

FIG. 5 is a diagram showing a winding state of a hoisting rope in the device shown in FIG. 4;

FIG. 6 is a view showing a wound state of a hoisting rope according to still another embodiment of the present invention.

FIG. 7 is a diagram showing an example of a conventional machine room-less elevator device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2a, 2b Guide rail for a car 3 Rider 4a, 4b Guide rail for a counterweight 5 Counterweight 7 Turning sheave 8, 16 Motor 10 Traction sheave 11a, 11b Turning sheave 12 Hoisting rope 15 Beam 17, 17a, 17b Turning sheave

Claims (4)

[Claims] 1. A car that moves up and down along a guide rail for a car provided on an inner wall surface of a hoistway, and a car that moves up and down along a guide rail for a counterweight provided on the back side of the car with respect to the landing. A counterweight, a turning sheave that is disposed at the top of the hoistway and changes the direction of a hoisting rope that suspends the car and the counterweight on both sides, and the hoisting rope is wound, and is rotated and driven by a motor. An elevator apparatus having a traction sheave, wherein the car is suspended by a hoisting rope passed under the car through two turning sheaves provided at a lower portion of the car, The turning sheave arranged at the top is installed so that the rotating surface of the turning sheave is oblique to the inner wall of the hoistway on the back side of the car. To, elevator equipment. 2. The elevator apparatus according to claim 1, wherein the traction sheave is provided inside the counterweight. 3. The elevator apparatus according to claim 1, wherein the traction sheave is provided at a lower part of the car. 4. The elevator according to claim 3, wherein the counterweight is provided with at least one diverting sheave, and the counterweight is suspended by a hoisting rope wound on the diverting sheave. apparatus.