WO2004058619A1

WO2004058619A1 - Elevator

Info

Publication number: WO2004058619A1
Application number: PCT/JP2002/013444
Authority: WO
Inventors: Naoki Hashiguchi
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2004-07-15
Also published as: KR20040089665A; EP1577247A1; EP1577247A4; KR100633950B1; JPWO2004058619A1; CN1612837A

Abstract

A frame (30) disposed on top of an elevator shaft (1) is fixed with a hoist (13) having a drive sheave (14) arranged such that the rotary shaft is directed substantially in the vertical direction, a deflection pulley, e.g. a cage side deflector wheel (15), a control board (31), and a governor (32). An elevator cage (5) is provided, in the upper surface (8) thereof, with an opening (9) for maintenance. Machines such as the hoist (13) are disposed to overlap the cage (5), and the like, at least partially on the vertical projection surface of the elevator shaft (1), and the gap between the upper surface (8) and a machine, e.g. the hoist (13), under a state where the cage (5) is stopping at a specified maintenance position, is set to not smaller than a value (V2/2g) obtained by dividing the square of the rated speed of the cage (5) by twice the gravitational acceleration, and that gap is set as small as possible. A maintenance crew (20) rides on a working table (21) in the cage (5) and stretches a hand from the opening (9) in the upper surface (8) of the cage to perform maintenance of a machine, e.g. the hoist (13).

Description

Elevator equipment Technical field

The present invention relates to an elevator apparatus in which a hoist is disposed at an upper part in a hoistway. Light

Background art

In the so-called machine room less elevator, which does not have a machine room, which has been increasing in recent years,

A hoist is provided at the top of the hoistway, and the drive sheave of the hoist is arranged between the hoistway and the hoistway wall on the vertical projection plane of the hoistway. In many cases, the hoist is arranged so that a part of the hoist overlaps on the vertical projection plane. In addition, equipment such as control panels, turning sheaves, and governors, which were conventionally placed in the machine room, are also placed between the hoistway wall and the elevator on the vertical projection plane of the hoistway. You.

In this type of elevator system, the thickness of equipment such as the sheave drive sheave, control panel, turning sheave, and governor is located between the elevator and the hoistway wall on the vertical projection plane of the hoistway. A gap of at least a minute is required. This gap creates dead space over the entire height of the hoistway, especially as buildings become taller.

Also, in the vertical direction of the hoistway top, assuming a situation in which the elephant runaway runs for some reason and ascends to the limit, the elevator installed at the top of the hoistway collides with the elevator. It is necessary to provide a clearance at the top of the hoistway for avoidance and to ensure the safety of maintenance personnel during maintenance work, and therefore dead space also occurs at the top of the hoistway. Here, the dead space at the top of the hoistway is the larger value of the following two. One is the vertical arrangement provided to prevent the elevators and elevators located at the top of the hoistway from hitting the elevators even when the elevators run up to the limit due to runaway. Refers to space. The other is that in the conventional machine room-less elevator, maintenance personnel are required to inspect equipment such as the hoisting machine arranged in the hoistway. —Either work on the top of the evening basket, or as in Japanese Patent Application Laid-Open No. 5-973577, the maintenance staff was required to work with the upper body out of the basket. Therefore, in the event that the elevator car runs out of control, the elevator is moved up and down to prevent the maintenance staff from hitting the top of the hoistway or the equipment located at the top of the hoistway. It is necessary to provide a large gap between the equipment placed on the road top and the space in the vertical direction to be secured.

As described above, in the conventional machine room-less elevator, there is a dead space over the entire height of the hoistway and a dead space at the top of the hoistway.

Therefore, in the present invention, a dead space generated over the entire height of the hoistway is prevented by disposing devices such as a hoist between the elevator and the hoistway wall surface on the vertical projection plane of the hoistway. Minimize. In addition, when the elevator is runaway and rises to the limit, the equipment installed at the top of the hoistway and the space provided for avoiding collision between the elevator and the safety of the maintenance staff depend on the equipment installed at the top of the hoistway. Minimize dead space. Thus, an object of the present invention is to provide an elevator apparatus that minimizes the required shaft space. Summary of the Invention

In the elevator apparatus according to the present invention, a frame is installed at the top of the hoistway, and a hoist and a turning pulley are attached to the frame. The hoist has a drive sheave arranged such that the rotation axis is substantially vertical. The turning pulley is used to change the direction of the main rope of the elevator that is wrapped around the drive sheave of the hoist. The elevator is equipped with an openable opening on the top of the car. Here, the hoist or the turning pulley is arranged so that at least a part thereof overlaps with either the elevator car or the counterweight on the vertical projection plane of the hoistway. Then, when the elevator car is stopped at the predetermined maintenance position, the gap between the hoist and the turning pulley and the upper surface of the elevator is set to at least the square of the rated speed of the elevator, and the acceleration of gravitational acceleration is calculated. It is set to be equal to or more than the value (W 2 g) obtained by dividing by two and to make this gap as small as possible. In addition, a control panel or governor for controlling the elevation of the elevator car is attached to the frame, and at least a part of the control panel or the governor is on the vertical projection surface of the hoistway. They are arranged so that they overlap with each other at night.

The elevator apparatus configured as described above is designed to reduce at least the clearance between the control panel or the governor and the upper surface of the elevator car when the elevator car is stopped at a predetermined maintenance position. evening the square of the rated speed of the car and at twice the gravitational acceleration value obtained by dividing (V ^2/2 g) or more, and is obtained by as small as possible the clearance.

Also, at least one maintenance work surface of the hoist or the control panel is disposed vertically downward.

Further, the hoist is formed to have a smaller thickness in the rotation axis direction than the radial dimension. According to the invention as described above, by arranging equipment such as a hoist collectively at the top of the hoistway, dead space generated over the entire height of the hoistway between the elevator car and the side wall surface of the hoistway is provided. Required to avoid the collision between equipment installed on the top of the hoistway and the elevator car, and to minimize the dead space due to the space provided to maintain the safety of maintenance personnel. An elevator system with a minimum road space can be obtained. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view showing an example of an arrangement of an elevator apparatus according to an embodiment of the present invention, in which the elevator apparatus is viewed from above.

FIG. 2 is a rear view of the elevator apparatus in FIG. 1 as viewed from the back of the hoistway. FIG. 3 is a side view of the elevator apparatus in FIG. 1 viewed from the side of the hoistway, and is a diagram for explaining a maintenance work method.

FIG. 4 is a conceptual diagram for explaining the operation of the elevator car during the runaway, assuming that the elevator car runs away in the elevator apparatus according to the present embodiment. is there.

FIG. 5 is a diagram for explaining a maintenance work method in the elevator apparatus having a high rated speed in the elevator apparatus according to the present embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described in more detail with reference to the accompanying drawings. In each of the drawings, the same or corresponding portions are denoted by the same reference characters, and overlapping description thereof will be appropriately simplified or omitted.

FIG. 1 is a plan view showing an example of an arrangement of an elevator apparatus according to an embodiment of the present invention, in which the elevator apparatus is viewed from above. FIG. 2 is a rear view of the elevator device of FIG. 1 as viewed from the back of the hoistway.

In the figure, a pair of elevator guide rails 3 and another pair of counterweights are installed in a hoistway 1 via a rail bracket (not shown) installed on a wall 2 of the hoistway 1. Guide rails 4 are provided. Elevator overnight car 5 is guided by the car guide rail 3 and moves up and down the hoistway 1. The counterweight 10 is guided by the counterweight guide rail 4 and the hoistway is opposite to the car 5. Move up and down in 1.

An entrance door 7 is located in front of the car 5 in the elevator 5 of the elevator. Hereinafter, in FIG. 1, the wall surface of the hoistway on the side of the entrance door 7 is referred to as the front surface, and the surface facing the front surface is referred to as the back surface. Further, both surfaces orthogonal to the entrance / exit surface of the car 5 are referred to as side surfaces. The lower surface and both side surfaces of the car 5 are supported by a car frame 6 formed by a plurality of beams. Here, the upper surface 8 of the car 5 is provided with an opening 9 that can be opened and closed by an opening and closing lid 9a for performing maintenance work. The counterweight 10 is disposed on the back side of the car 5 in the hoistway 1, and one side face is brought close to the wall surface 2 of the hoistway 1.

Next, a frame 30 supported by a car guide rail 3 and a counterweight guide rail 4 is provided on the top of the hoistway 1. The frame 30 is provided with a hoisting machine 13 having a drive sheave 14 around which an elevator main wire 12 is wound. The drive sheave 14 is arranged such that the rotation axis is substantially vertical. The hoisting machine 13 is arranged so that at least a part of the hoisting machine 13 overlaps with the car 5 on the vertical projection plane of the hoistway 1. In the arrangement example shown in Fig. 1, the hoisting machine 13 has a main part of the hoistway 1 on a part of the other corner part of the car 5 where the counterweight 10 is arranged, which is different from the corner part. It is arranged so as to overlap with the car 5 on the vertical projection plane, and the opening 9 of the car upper surface 8 is also arranged so that a part of the hoisting machine 13 overlaps with the car on the vertical projection plane. In addition, the hoisting machine 13 is smaller in thickness in the rotation axis direction than in the radial direction. Has been established.

Next, the turning pulleys used in this embodiment indicate the car side deflector 15, the counterweight side deflector 16, the car pulley 17, and the counterweight pulley 18. The arrangement of these deflection pulleys will be described in order along with the routing of the main ropes 12 wound around the drive sheave 14 of the hoisting machine 13. One of the main ropes 12 is wrapped around a car-side deflecting wheel 15, turned from a horizontal direction to a vertical direction, and is sequentially wound around a car pulley 17 provided on each of both lower sides of the car frame 6. It is hung, turned again in the vertical direction, and attached to the frame 30 at the top of the hoistway 1. The other of the main ropes 12 is wound around the counterweight side deflector 16 from the hoisting machine 13, turned in the vertical direction from the horizontal direction, and wound around the counterweight pulley 18, and the hoistway. 1.Attached to the top frame 30. Here, the car side deflecting car 15 and the car pulley 17 are arranged so that at least a part thereof overlaps the car 5 on the vertical projection plane of the hoistway 1. That is, the main ropes from the car side deflector 15 to the car pulley 17 and the main ropes from the car pulley 17 to the frame 30 are arranged as close to the side of the car 5 as possible. As a result, most of the car-side deflector 15 and the car pulley 17 are arranged so as to overlap with the car 5 on the vertical projection plane, and the distance between the car 5 and the hoistway wall 2 is increased. It is made unnecessary. Note that the car-side deflecting vehicle 15 is arranged so that a part thereof also overlaps with the opening 9 of the car upper surface 8. In addition, the counterweight deflector 16 is arranged so that at least a part thereof overlaps the counterweight 10 on the vertical projection plane of the hoistway 1, and the pulley 18 for the counterweight 1 The counterweight 10 is arranged so as to overlap the whole on the projection plane. That is, it is not necessary to make a large gap between the counterweight 10 and the elevator 5.

Next, a control panel 31 for controlling the elevation of the elevator 5 is arranged so that at least a part of the frame 30 on the top of the hoistway 1 overlaps the car 5 on the vertical projection surface of the hoistway 1. Placed in In the arrangement example of FIG. 1, the entire control panel 30 is arranged so as to overlap with the car 5, and the entire control panel 31 is also arranged so as to overlap with the opening 9 of the car upper surface 8 on the vertical projection plane. I have.

Next, the governor 32 is installed on the frame 30 at the top of the hoistway 1 in the same manner as the control panel 31. The governor 32 is wrapped with the governor rope 33. In addition, a governor pulley 34 for applying tension to the governor rope 33 is provided below the hoistway 1. Like the control panel 31, the governor 3 2 is also arranged so that at least a part of the governor overlaps with the elevator car 5 on the vertical projection plane of the hoistway 1, and also governs the speed of the opening 9 on the car upper surface 8. The parts of the machine 32 are arranged so as to overlap on the vertical projection plane. In other words, except for the sheave section of the governor 32, it is arranged so as to overlap with the car 5, and there is no waste between the governor 32 and the side of the car 5 due to the thickness of the governor 32. There is no need to leave a gap.

As described above, in this embodiment, the hoistway 13 such as the hoisting machine 13, the car side deflecting car 15, the counterweight side deflecting car 16, the control panel 31, and the governor 32 are installed. The devices are collectively arranged in a frame 30 installed on the top of the hoistway 1.

(In this specification, the equipment installed at the top of the hoistway refers to the hoisting machine 12, the car-side deflecting car 15, the counterweight deflecting car 16, the control panel 31, and the governor 32. Although the frame 30 has been described as being supported by the car guide rails 3 and the counterweight guide rails 4 in the above description, the frame 30 is supported by the wall 2 of the hoistway 1. May be performed.

FIG. 3 is a side view of the elevator apparatus in FIG. 1 viewed from the side of the hoistway, and is a diagram for explaining a maintenance work method.

A maintenance method for the elevator apparatus according to this embodiment will be described with reference to FIG. First, the elevator 5 is stopped at a predetermined maintenance position near the top floor, and the maintenance person 20 rides on the work platform 21 to open the opening / closing lid 9 a of the opening 9 on the upper surface 8 of the car. Perform maintenance work on the hoistway top equipment from inside the car 5. The work table 21 used here is a folding type which is permanently installed in the car 5 and is folded and stored in the inner side wall of the car 5 during normal operation of the elevator. The work table 21 has a mechanism for adjusting the height upward and downward, and adjusts the height of the table according to the height of the maintenance staff 20. In the hoisting machine 13 and the control panel 31, a maintenance work target surface 22 for performing maintenance work is arranged vertically downward. In the present invention, since the purpose is to minimize the dead space at the top of the hoistway 1, the gap between the car upper surface 8 and the equipment installed at the top of the hoistway needs to be as small as possible. A calculation is made to determine the distance between the car top 8 and the equipment installed on the hoistway top.

Fig. 4 is a conceptual diagram for explaining the operation of the elevator car during the runaway, assuming that the elevator car runs away in the elevator apparatus according to this embodiment. (A) is a diagram showing the moment when the elevator car rises at the rated speed and the counterweight enters the shock absorber. (B) is a diagram showing a limit position when the elevator car is further raised by fake power after the counterweight enters the shock absorber.

When the elevator is moving up and down at the rated speed, the gap between the upper surface 8 of the elevator 5 and the equipment installed on the top of the hoistway assumes that the car 5 will run away for some reason. Therefore, it is necessary to prevent the car 5 from colliding with the equipment installed on the top of the hoistway. か In other words, the gap between the upper surface 8 of the car and the equipment installed on the top of the hoistway is What is necessary is just to be more than the distance which does not collide with an apparatus.

Here, as shown in Fig. 4 (A), if elevator 5 continues to ascend without decelerating for some reason while elevator 5 is climbing at rated speed (V), it will move in the opposite direction to car 5. The counterweight 10 that continues to descend enters the shock absorber 11 1. As shown in FIG. 4 (B), this intrusion eliminates the tension of the main cable 12 between the car 5 and the counterweight 10 until then. At this time, the car 5 which had been rising at the rated speed (V) jumps up with this speed (V) as the initial speed due to the inertial force. The jump allowance of the elevator car 5 can be obtained by the following equation.

S = W 2 g

Here, (S) is the lift of the elevator car, (V) is the initial speed (rated speed) of the elevator car, and (g) is the gravitational acceleration.

Therefore, according to the above formula, if the clearance between the car upper surface 8 and the equipment installed on the top of the hoistway is set to at least the jump allowance (S) of the car 5, the car 5 must be at the rated speed (V). Even if a runaway occurs during climbing, it is possible to avoid a situation in which the car 5 collides with equipment installed on the top of the hoistway. However, on the other hand, in order to reduce the dead space at the top of the hoistway, in order to avoid collision between the car upper surface 8 and equipment installed on the top of the hoistway when the elevator runs away, this gap is There is a demand to make it as small as possible. Therefore, the gap determined by the above equation Is the jump (S) from the point where the counterweight 10 enters the shock absorber 11, and in order to make this gap as small as possible, the maintenance person 20 needs the car 5 to perform maintenance work. It is desirable that the maintenance position when moved is just before the counterweight 10 comes into contact with the shock absorber 11. Actually, it is necessary to provide an allowance between the counterweight 10 and the shock absorber 11 at the maintenance position, but it is sufficient if the allowance is about 20% of the jump-up allowance (S) of the car 5. It is.

From the above, the gap between the car upper surface 8 and the equipment installed on the hoistway at the maintenance position should be set to about 20% of the jump allowance (S) to the jump allowance (S) of the car 5 Will be. For example, when the gap is actually calculated in an elevator at a rated speed of 120 meters per minute, the jump allowance (S) of the car 5 is about 20 cm, and considering the allowance allowance, the gap is 20 to What is necessary is to secure about 24 cm. Therefore, as shown in Fig. 3, during the maintenance work, the maintenance person 20 does not protrude 巔 from the opening 9 of the car upper surface 8 and reaches up and down the hoisting machine 13 by reaching out. By setting the height of the work platform 21 so that the equipment at the top of the road can be reached, even if the car 5 runs away, the maintenance staff 20 can hit the equipment at the top of the hoistway. Can be prevented.

Next, FIG. 5 is a diagram for explaining a method of maintenance work in an elevator apparatus having a high rated speed in the elevator apparatus according to the present embodiment.

In the event that the rated speed is higher than 120 meters per minute, that is, in the so-called high-speed category, the jumping allowance (S) of the elevator car 5 increases in proportion to the square of the speed. Therefore, the minimum required clearance between the car upper surface 8 and the equipment installed on the top of the hoistway becomes larger as the elevator with the higher rated speed becomes larger. In such a case, as shown in Fig. 5, when performing maintenance work, the maintenance person 20 projects only the head from the opening 9 in the top surface 8 of the car, and reaches the hand Maintenance work can be performed by setting the height of the work platform 21 so that the equipment installed on the hoistway top such as the machine 13 can be reached, and maintenance work can be performed even if the car 5 runs out of control. Can prevent the device from hitting the head by shrugging.

Further, in this embodiment, an example is shown in which the work table 21 is permanently installed in the elevator car 5, but the work table 21 is not limited to be permanently installed in the car 5 and may be used for maintenance work from outside. It may be brought in. In the figure, the maintenance staff 20 is working while standing, but the same effect can be obtained even if the height of the work table 21 is further increased and the maintenance staff 20 works while sitting. Is self-evident.

According to the above embodiment, the following effects can be obtained.

The equipment installed at the top of the hoistway, such as the hoisting machine 13, the car side deflector 15, the counterweight side deflector 16, the control panel 31, and the governor 3 2, are integrated into the frame 30, and the hoistway 1 No equipment should be placed between the hoistway wall 2 and the elevator car 5 on the vertical projection surface, and the equipment installed at the top of the hoistway should be placed on the vertical projection surface in cage 5 or counterweight 10. By arranging the hoistway 1 at least partially overlapping, the plane dimension of the hoistway 1 can be minimized, and the dead space over the entire height of the hoistway 1 can be minimized. In addition to the fact that the equipment installed at the top of the hoistway is placed on the vertical projection plane so that at least a part of it is overlapped with the car 5 or the counterweight 10, the equipment installed at the top of the hoistway 8 When the maintenance staff 20 works from the inside of the car 5, it is easy to reach the equipment to be maintained when the maintenance staff 20 works from inside the car 5, so that the maintenance workability is improved. You can also.

In addition, collision between the elevator car 5 and the equipment installed on the top of the hoistway during runaway of the elevator can be avoided, and the gap between the top of the hoistway 1 and the upper surface 8 of the elevator car 5 can be avoided. By setting it to be the minimum, the dead space at the top of the hoistway 1 can be minimized. In addition to the fact that the maintenance work surface 22 of the hoisting machine 13 and the control panel 3 1 is arranged vertically downward, the maintenance person 20 rides on the work table 21 from inside the car 5. Maintain equipment at the top of the hoistway by extending your hand without extending your head from the opening 9 in the top 8 of the car, or by extending your hand out of the opening 9 if necessary. Even if the car 5 runs away, the maintenance worker 20 and the car 5 can be prevented from colliding with each other just by shrugging, and the safety of the maintenance worker 20 can be ensured. As a result, it is possible to reduce the dead space, which was previously required to ensure safety during maintenance work.

Further, the hoisting machine 13 is formed to have a smaller thickness in the rotation axis direction than the radial dimension, thereby contributing to a reduction in the overall height of the hoistway 1.

In addition, the elevator car 5 described in this embodiment is installed below the car frame 6. Since the car is supported by the car pulleys 17 and is moved up and down, there is no need to provide an upper frame on the car upper surface 8, which contributes to the reduction of the overall height of the hoistway 1. If the upper surface of the car 8 does not require an upper frame, such as a type in which the car 5 is hung on both sides, the roping type is not limited to the 2: 1 roving type in this embodiment. It works.

As described above, the dead space existing in the machine room-less elevator can be minimized, and the space volume occupied by the hoistway 1 can be minimized. Industrial applicability

As described above, the elevator apparatus according to the present invention can minimize the dead space existing in the hoistway of the conventional machine room elevator. It is possible to provide an elevator apparatus with further improved performance. In addition, the construction cost of the building can be reduced, and it is suitable for providing elevators in severe location conditions, which are restricted by the appearance and height of the building.

Claims

The scope of the claims

1. A frame installed at the top of the hoistway,

A hoist having a drive sheave attached to the frame and arranged so that a rotation axis is substantially vertical;

A turning pulley that is attached to the frame and turns the main rope of the elevator wound around the drive sheave of the hoist;

Elevator with an opening that can be opened and closed on the top surface

The hoist or the turning pulley is arranged so that at least a part thereof overlaps with either the elevator car or the counterweight on the vertical projection plane of the hoistway, and the elevator car stops at a predetermined maintenance position. in state, the value of the gap between the hoist Contact and the turning sheave and the elevator car top and at least the elevator Isseki square of the rated speed of the car is divided by twice the gravitational acceleration (V ^2/2 g) An elevator apparatus as described above, wherein the gap is made as small as possible.

2. A control panel for controlling the elevation of the elevator car is attached to the frame,

At least a part of the control panel is arranged so as to overlap with the elevator car on a vertical projection plane of the hoistway,

In the state where the elevator car is stopped at a predetermined maintenance position, a value obtained by dividing at least the square of the rated speed of the elevator car by twice the gravity acceleration (i.e., the clearance between the control panel and the upper surface of the elevator car) ( 2. The elevator apparatus according to claim 1, wherein W 2 g) or more, and the gap is made as small as possible.

3. A governor is attached to the frame,

At least a portion of the speed governor is arranged so as to overlap with the above-mentioned night on the vertical projection plane of the hoistway,

In the state where the elevator car is stopped at a predetermined maintenance position, the gap between the governor and the upper surface of the elevator car is determined by calculating at least the square of the rated speed of the elevator car by the gravitational acceleration. The elevator device according to claim 1 or 2, wherein the value is equal to or more than a value obtained by dividing by ^two (V2 2g) and the gap is made as small as possible. Place.

4. The elevator device according to claim 1, wherein at least one of the hoisting machine and the control panel has a maintenance work surface arranged vertically downward.

5. The elevator apparatus according to any one of claims 1 to 4, wherein the hoist is formed to have a smaller thickness in a rotation axis direction than a radial dimension.

6. The frame according to any one of claims 1 to 5, wherein the frame is supported by any one of a guide rail for an elevator car and a guide rail for a counterweight, or a hoistway wall surface. Elevator overnight device.