JP2002362845A - Balance weight hoisting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate inspection works, restoration works, and main rope replacement of a hoisting machine in an elevator installing the hoisting machine and a control panel in an uppermost part of a hoistway. SOLUTION: This balance weight hoisting device 30 hoists a balance weight 14 heavier than a car with the car and the balance weight 14 positioned in the uppermost floor side of the hoistway and near a lowermost pit 21 respectively and fixes it at a prescribed position, lowers the car position, and secures a route to the hoisting machine and the control panel. This balance weight hoisting device is provided with a pulley device 31 installed in the back of a car guide rail 16 and a hoisting rope 35 suspended to the pulley device, hoisting the balance weight, and capable of fixing it in a position raised by a prescribed distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a counterweight for fixing a car to a predetermined position in an elevator system having no machine room in an emergency, repair, inspection or the like.

[0002]

2. Description of the Related Art In an elevator system having no machine room, when a hoist and a control panel are installed at the top of a hoisting room, a car may be controlled by the hoist due to failure of the hoist. If the machine stops in front of the machine and the machine cannot be operated from the hall, the car must be secured to secure a route to the machine and control panel to restore the machine and control panel. Need to be lowered. For example, the car is fixed at a position where the car can be put on the car roof from the floor of the top floor hall.

[0003] To lower the car, load the weight to the top floor, put it on the car, make the car heavier than the counterweight, and then roll up the hall to lower the car because the weight is heavier than the car. He released the aircraft brakes and lowered the car to the required height. At that time, a stopper was required to fix the car at a required height so that the car would not fall freely. Also,
When the brakes cannot be released for some reason, such as a failure of the hoist, it was difficult to lower the car even with the maximum load weight.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a hoisting machine and a control panel in which at least the hoisting machine is installed at the uppermost portion in a hoistway, and a car stops in front of the hoisting machine and the control panel. In addition, when the hoist can not be operated from the hall, the counterweight is raised by pit work, the car is lowered, and the route to the control panel is secured. Another object of the present invention is to make it possible to hold the counterweight when replacing the main rope.

[0005]

SUMMARY OF THE INVENTION A first aspect of the present invention is to install a hoist at or near the top of a hoistway and wind up a rope to create a car and a counterweight that is heavier than the car. In an elevator system in which a guide rail for a car suspended in the hoistway and guiding the car is disposed in the hoistway, a pulley device installed on the back of the guide rail for the car, and the pulley A lifting weight lifting device comprising a lifting rope suspended from the device and capable of fixing the lifting weight at a position raised by a predetermined distance from or near the lowermost position of the hoistway.

According to this configuration, it is possible to pull up and support the counterweight in the pit below the hoistway in the following procedure. In other words, if the car is on the top floor of the hoistway and the counterweight is located at or near the bottom pit of the hoistway at the time of work, firstly, a position higher than the height at which the counterweight is ultimately to be lifted With the pulley device attached to the back of the car guide rail,
A pulling rope is laid on the pulley device, one end is connected to the counterweight side, and the other end is connected to the guide rail for the car installed on the opposite side of the counterweight of the car guide rail to which the pulley device is attached. Hang it on a fixed hanging surface.

When the pulling rope is pulled in this state, the pulling rope is pulled to a hanging base fixed to the car guide rail, and the counterweight can be pulled up via the pulley device. In addition, the chain block can be connected to the rope side opposite to the weight for lifting, and when the operation is stopped, the counterweight can be supported in that state.

In this configuration, the counterweight is pulled up,
Or, when supported, the pulley device is close to the rear of the car guide rail, so the pulling force acts in the direction of extension of the guide rail, the bending moment acting on the guide rail is small, and the thickness of the rail is small. It is possible to raise and support a heavy counterweight without changing the size of the counterweight.

As described above, after the lifting and supporting of the counterweight by the pit work, only the lifting weight of the counterweight is used.
Since the car is in a lowered state, it is possible to get on the car from the top floor hall and restore the hoist and the control panel.

Further, the present structure can be used not only in an emergency but also for holding a counterweight when replacing a main rope.

According to a second aspect of the present invention, a first suspender connecting one end of the pulling rope is provided below the counterweight, and a second suspender connecting the other side of the pulling rope is connected to the second suspender. Secure to the car guide rail.

According to this structure, the second suspender fixed to the guide rail for the car can be attached to the buffer stand or the guide rail, and the suspender body fixed to the guide rail for the car is pressed against the side surface of the guide rail. Therefore, it is not necessary to previously install a hanging stand or an article for attaching the hanging stand on a pit floor surface or a hoistway wall surface. Further, since it can be attached only when the counterweight lifting device is used, there is no need to consider contact with other parts during elevator operation. In addition, by expanding the support span that receives the load corresponding to the weight of the counterweight generated when the counterweight is lifted, the reaction force applied to the second suspension unit fixed to the guide rail for the car can be reduced, so that the weight of the counterweight is increased. When lifting the weight, the suspension can be reduced in weight. Furthermore, by the structure in which the suspension body fixed to the car guide rail is pressed against the side of the guide rail, for the same reason, for example, a hook connection portion of a chain block for lifting can be installed at a position away from the guide rail. Thus, it is possible to prevent interference between the rail block and the chain block between the suspension unit fixed to the car guide rail and the pulley device.

According to a third aspect of the present invention, the first suspension base is detachably attached to a lower portion of the counterweight.

By this means, when the pulley device is mounted at the same height, when the first suspension, ie, the counterweight-side suspension, is attached to the lower portion of the counterweight, the pulley device can be extended more than when it is mounted on the upper portion. The greater the distance, the higher the balancing weight can be raised. In addition, if the counterweight side suspension is made to have, for example, an L-shaped structure, even when the counterweight is attached to the lower surface of the counterweight, the pulling rope connecting portion can be arranged on the side of the counterweight, and the counterweight of the pulling rope is used. The occurrence of kink at the corner of the lower surface can be prevented.

In a fourth aspect of the present invention, the pulling rope is provided with a pulling means for pulling the pulling rope between the pulley device and the second suspension.

One end of the pulling rope is hung on a counterweight suspender, and the other end is connected to a pulling means, for example, one end of a chain block or a hydraulic cylinder via a pulley device installed on the back of the guide rail. And the other end of the hydraulic cylinder is connected to a second suspension fixed to the guide rail for the car, and then, for example, the hydraulic cylinder is contracted, and the pulling rope is drawn to the second suspension. , Can lift and support the counterweight.

According to a fifth aspect of the present invention, a rope storage device is provided at the back of the guide rail for the car, and both ends of the pulling rope are stored during normal operation of the elevator.

At the time of normal operation of the elevator, both ends of the pulling rope crawled by the pulley device are connected to a rope storage bracket installed on the back of the rail, for example, by relaying a turnbuckle, and stored. The lifting rope can be stored for immediate use when needed without sagging and without interfering with the lifting equipment around the rails.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. FIG. 1B is a schematic longitudinal sectional view, and FIG.
(A) shows a schematic cross section. The hoistway 10 is provided to vertically penetrate each floor of the multi-story structure, and the hoisting machine 11 and the control panel 12 are directly installed near the top of the hoistway 10 on the top floor of the building. The building does not have a machine room. The hoist is mounted on one of the side walls of the hoistway, and hoisting the main rope 15 engaged with the car 13 at one end and the counterweight 14 at the other end, and moves the car up and down. The car 13 is elevated by being guided by a pair of car guide rails 16 extending along the hoistway. When the car 13 rises, the counterweight 14 descends along the counterweight guide rail 17. The 16 guide rails for the car and the 17 guide rails for the counterweight are arranged to face adjacent mutually perpendicular wall surfaces of the hoistway 10 respectively.

When the car 13 stops in front of the hoisting machine 11 and the control panel 12 due to a failure of the hoisting machine 11, the hoisting machine 1
1. Since the route to the control panel 12 is blocked by the car 13, it is necessary for the operator to lower the car 13 in order to perform maintenance. At this time, since the car 13 is stopped at the top floor hall 20 at the top of the hoistway,
The counterweight 14 always stops at the pit 21 which is the lowest position of the hoistway. When the hoisting machine 11 cannot be operated from the top floor hall 20, by raising the balancing weight 14, the car 13 is lowered, and a route to the hoisting machine 11 and the control panel 12 is secured.
The user gets on the roof of the car 13 and hoisting machine 11 and control panel 12
Perform recovery.

FIGS. 2 and 3 show a counterweight lifting device 30 according to this embodiment. The counterweight lifting device 30 is retrofitted to a two-sheave type pulley device 31 mounted on a rail joint eye panel 18 attached to the back of the car guide rail 16 with a rail clip, and a car buffer base 22. For example, a suspender 32 fixed to the leg 22a of the buffer stand 22 of the car guide rail, a counterweight side suspender 33 attached to the lower surface of the counterweight 14, and a hook 34a at one end are fixed to the guide rail 16 for the car. A pull-up rope 3 having a chain block 34 hung by a chain 36 connected to a suspension 32 of the same type, and the other end thereof being balanced via a pulley device 31 and connected to a weight-side suspension 33.
5. The pulley device 31 is installed at a position higher than the position of the counterweight-side hanging base 33 after the lifting of the counterweight 14. With this configuration, the lifting weight 14 can be lifted and supported.

The suspension base 32 fixed to the car guide rail 16 is fixed to the car side buffer base 22 with bolts. Therefore, it can be mounted only during use, and can be stored in the pit 21 during normal elevator operation, thereby avoiding interference with the car 13 or the like. Further, since the suspension base 32 fixed to the car guide rail 16 is attached in contact with the side surface of the car guide rail 16 so as to be pressed against the side face thereof, the hook of the chain block 13 is hooked when the counterweight 14 is pulled up. Car rail 16 and car side buffer stand 2 even if the car is pulled up
2. The rail bracket 19 can receive the load, and for example, a hanging stand 3 fixed to the car guide rail 16
2 can be lifted and supported by the counterweight 14 which is heavier than when it is installed alone in the pit 22. Further, with this structure, the chain block 34
Can be separated from the car rail 16 so that the rail bracket 19 can be prevented from interfering with the chain block 34 or the pulling rope 35.

As shown in FIGS. 2 and 3, the counterweight-side suspension base 33 is fixed to the lower surface of the counterweight 14 with bolts. Therefore, it can be attached only during use and stored in the pit 22 during normal elevator operation, thereby avoiding interference with the car 13 or the like. The counterweight-side suspension base 33 is L-shaped for receiving the lower surface of the weight, and rises to the side from the lower surface of the counterweight 14. For this reason, the pulling rope 35 can be connected straight from the pulley device 31 to the counterweight side suspender 33, and does not contact the corners of the counterweight 14 or the like, and a kink occurs when the counterweight 14 is pulled up. Nothing. In addition, the balance weight side suspension base 33
Is attached to the lower surface of the counterweight 14, the distance to the pulley device 31 is longer than when the counterweight 14 is attached to the upper portion, so that the counterweight 14 can be pulled higher.

FIG. 4 shows a second embodiment of the present invention. Note that the same reference numerals as those of the above-described embodiment indicate the same parts. As shown in the figure, a pulley device 31, a suspension 32 fixed to the guide rail 16 for the car, a counterweight side suspension 33, a pulling rope 35, a hydraulic cylinder 40 constituting a pulling means, a connecting rope 41, and a hydraulic pressure. The unit 42 is installed. After the connecting rope 42 is set on the suspension 32, the hydraulic unit 42 is operated to drive and contract the hydraulic cylinder 40, whereby the lifting rope 35 is drawn to the suspension 32 fixed to the guide rail 16 for the car. . As a result, the counterweight 14 can be pulled up via the pulley device 31. If the operation of the hydraulic cylinder 40 is stopped, the counterweight 14 can be supported in that state.

By raising the balancing weight 14, the car 13 can be lowered to the required height,
As a result, it is possible to get on the car 13 from the top floor hall 20 and perform the recovery work of the hoist 11 and the control panel 12.

FIG. 5 shows a third embodiment of the present invention. In the figure, the same reference numerals as in the first embodiment denote the same parts. During normal operation of the elevator, both ends of the pulling rope 35 crawled by the pulley device 31 are connected to the rope storage brackets 51, 51 via the turnbuckle 50. With this configuration, by tightening the turnbuckle 50, the pulling rope 35 can be stored without sagging at the pulley device 31 and without interfering with the rail bracket 19. The rope storage bracket 51 is the rail 1 for the car.
6. Since it is fixed to the back by rail clips, it does not interfere with other parts even during normal elevator operation, and the pulling rope 35 can always be stored. In this embodiment, when the counterweight lifting device is used, the turnbuckle 50 is used.
, The lifting rope 35 is removed from the rope storage bracket 51, and the counterweight is pulled up as described above.

[0027]

According to the present invention, in an elevator system having no machine room, when inspecting and restoring a hoisting machine and a control panel arranged at the top of or near the hoistway, the pit work is performed. By raising the counterweight, the car can be lowered, and the path to the hoisting machine and the control panel can be secured, for example, by using the car rooftop as a foothold. Also, when the counterweight lifting device is not used, the device can be stored without interfering with other items. Further, it can be used not only in an emergency but also for holding a counterweight when replacing the main rope.

[Brief description of the drawings]

1A and 1B show a configuration of an elevator illustrating a first embodiment of the present invention, wherein FIG. 1A is a schematic cross-sectional view taken along line AA of FIG.
(B) is a schematic longitudinal sectional view.

FIGS. 2A and 2B show a counterweight lifting device according to a first embodiment of the present invention, wherein FIG. 2A is a schematic side view and FIG.

FIG. 3 is a schematic perspective view of the first embodiment.

4A and 4B show a counterweight lifting device according to a second embodiment, in which FIG. 4A is a schematic side view and FIG.

FIGS. 5A and 5B show a counterweight lifting device according to a third embodiment, wherein FIG. 5A is a schematic side view and FIG.

[Explanation of symbols]

 10: hoistway 11: hoisting machine 12: control panel 13: car 14: counterweight 15: main rope 16: car guide rail 30: counterweight lifting device 31: pulley device 32: suspension (second Suspension) 33: Suspension (first suspension) 34: Chain block 35: Pulling rope

Claims (5)

[Claims] 1. A hoist is installed at or near the top of a hoistway, and a rope is hoisted to suspend a car and a counterweight that is heavier than the car in the hoistway. In an elevator system in which a car guide rail for guiding a car is arranged in the hoistway, a pulley device installed on the back of the car guide rail, and the counterweight suspended by the pulley device and the A lifting weight pulling device comprising a pulling rope that can be fixed at a position raised by a predetermined distance from a lowermost position or its vicinity. 2. A first suspender connecting one end of the pulling rope is provided below the counterweight, and a second suspender connecting the other end of the pulling rope is connected to the car guide. The balancing weight lifting device according to claim 1 fixed to a rail. 3. The balancing weight lifting device according to claim 2, wherein the first suspension base is detachably attached to a lower portion of the balancing weight. 4. The lifting device according to claim 2, wherein said pulling rope is provided with a pulling means for pulling said pulling rope between said pulley device and said second suspension. 5. The balancing weight lifting device according to claim 1, further comprising a rope storage device provided at the back of the car guide rail, to store both ends of the lifting rope during normal operation of the elevator.