CN112533855B - Method for extending lift of construction elevator and rope descending auxiliary tool for elevator - Google Patents
Method for extending lift of construction elevator and rope descending auxiliary tool for elevator Download PDFInfo
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- CN112533855B CN112533855B CN201880095754.6A CN201880095754A CN112533855B CN 112533855 B CN112533855 B CN 112533855B CN 201880095754 A CN201880095754 A CN 201880095754A CN 112533855 B CN112533855 B CN 112533855B
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- rope
- sheave
- lowering
- lifting
- hanging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B19/00—Mining-hoist operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
- B66B9/187—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with a liftway specially adapted for temporary connection to a building or other structure
Abstract
Provided are a lift extension method for a construction elevator and a rope lowering aid for an elevator, which can reduce the braking force required for controlling the movement amount and speed of a rope when extending the lifting stroke. The lift extension method for a construction elevator of the present invention comprises: a rope hanging change step of hanging the rope (8) from the hanging wheel (7) of the second lifting body (2) to a rope descending auxiliary tool (18) which is lighter than the hanging wheel (7) of the second lifting body (2); a lifting step of lifting the machine room unit (3) after the rope hanging-changing step; an auxiliary device descending step of descending the rope descending auxiliary device (18) by sending out the rope (8) from the plurality of rope drums (12) after the ascending step; and a rope restoring step of re-hanging the rope (8) from the rope descending aid (18) to the hanging wheel (7) of the second lifting body (2) after the aid descending step.
Description
Technical Field
The present invention relates to a lift extension method for a construction elevator and a rope lowering aid for an elevator.
Background
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Sho-52-113968
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made to solve the above problems. The purpose is to provide a lift extension method for a construction elevator and a rope descending auxiliary tool for the elevator, which can reduce the braking force required for controlling the movement amount and speed of a rope when the lifting stroke is extended.
Means for solving the problems
A method for extending a lift of a construction elevator according to the present invention is a method for extending a lift of a construction elevator in which a rope fed from a plurality of rope reels is wound around a sheave of a hoisting machine, a hoist sheave of a first hoist and a hoist sheave of a second hoist, the hoisting machine is mounted on a machine room unit that can be raised and lowered in a hoistway, a load of the first hoist can be supported by the machine room unit, and a load of the second hoist can be supported by a lower portion of the hoistway, the method comprising: a rope re-hanging step of re-hanging the rope from the hanging wheel of the second lifting body to a rope descending auxiliary tool having a weight smaller than that of the hanging wheel of the second lifting body; a lifting step of lifting the machine room unit after the rope hanging change step; an auxiliary device descending step of descending the rope descending auxiliary device by sending out the rope from the plurality of rope drums after the ascending step; and a rope restoring step of, after the auxiliary lowering step, re-hanging the rope from the rope lowering auxiliary to the hanging wheel of the second lifting body.
The rope descending assistive device for the elevator of the invention comprises: a sheave around which a plurality of ropes are wound; a sheave mounting arm that supports the sheave at a position above the sheave; a pair of guide portions connected to both ends in the longitudinal direction of the sheave mounting arm, guided by a pair of guide rails provided in the hoistway, and fixable to the pair of guide rails; a rotation support portion that enables the sheave to move in a direction of a rotation axis of the sheave; and a retainer that retains a state of the sheave after the sheave has moved in a direction of a rotation axis of the sheave, the state of the sheave being changed to any one of a state of being located in a space between the pair of guide portions facing each other and a state of not being located in the space between the pair of guide portions facing each other.
Effects of the invention
According to these inventions, the rope is hung from the hanging wheel of the second lifting body to the rope lowering accessory. Therefore, the braking force required to control the movement amount and speed of the rope can be reduced when the lifting stroke of the construction elevator is extended.
Drawings
Fig. 1 is a schematic diagram of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 2 is a schematic diagram of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 3 is a schematic diagram of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 4 is a schematic diagram of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 5 is a schematic diagram of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 6 is a diagram showing a first example of a rope reel in embodiment 1.
Fig. 7 is a diagram showing a first example of a rope reel in embodiment 1.
Fig. 8 is a diagram showing a second example of the rope reel in embodiment 1.
Fig. 9 is a diagram showing a second example of the rope reel in embodiment 1.
Fig. 10 is a schematic diagram of a second example of a construction elevator to which the lift extension method according to embodiment 1 is applied.
Fig. 11 is a schematic diagram of a second example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 12 is a schematic diagram of a second example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 13 is a schematic diagram of a second example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 14 is a schematic diagram of a second example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 15 is a front view of the rope lowering assistant in embodiment 1.
Fig. 16 is a plan view of the rope lowering assistant in embodiment 1.
Fig. 17 is a side view of the rope lowering assistant in embodiment 1.
Fig. 18 is a front view of the rope lowering assistant in embodiment 1.
Fig. 19 is a plan view of the rope lowering assistant in embodiment 1.
Fig. 20 is a side view of the rope lowering assistant in embodiment 1.
Fig. 21 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 22 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 23 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 24 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 25 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 26 is a diagram for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 27 is a flowchart for explaining steps of the head extension method according to embodiment 1.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. Duplicate descriptions are appropriately simplified or omitted.
Fig. 1 to 5 are schematic diagrams of a first example of a construction elevator to which the lift extension method in embodiment 1 is applied.
Fig. 1 to 5 show a situation in a hoistway of a building in a building. For example, as shown in fig. 1, the construction elevator includes a first lifting body 1, a second lifting body 2, a machine room unit 3, and a hoisting machine 4. A plurality of ropes 8 are wound around the sheave 5 of the hoisting machine 4, the hanging sheave 6 of the first vertically movable body 1, and the hanging sheave 7 of the second vertically movable body 2.
A buffer 9 and a buffer 10 are provided in a pit of the hoistway. The buffer 9 is located directly below the first elevating body 1. The damper 10 is located directly below the second lifting body 2.
The first vertically movable body 1 is one of a car and a counterweight of an elevator. The second lifting body 2 is the other of the car and the counterweight of the elevator. Fig. 1 to 5 illustrate a case where the first vertically movable body 1 is a car and the second vertically movable body 2 is a counterweight. In this case, the first vertically movable body 1 can be moved up and down in the hoistway along a pair of car guide rails, not shown. In this case, the second lifting body 2 can be lifted and lowered in the hoistway along a pair of not-shown pair of heavy guide rails.
The load of the second lifting body 2 can be supported at the lower part of the hoistway. The second vertically movable body 2 may be placed on the buffer 9 or the buffer 10, for example. The second vertically movable body 2 may be fixed to a car guide rail or a counterweight guide rail, for example. The second vertically movable body 2 may be fixed to a structure on the building side in a building, for example.
The machine room unit 3 can be raised and lowered in the hoistway under guidance of at least one of a car guide rail and a counterweight guide rail, for example. The machine room unit 3 can be fixed to at least one of a car guide rail and a counterweight guide rail, for example. The machine room unit 3 may be fixed to a structure on the building side in a building, for example.
The machine room unit 3 is mounted with, for example, a hoisting machine 4, a control panel 11, and a plurality of rope reels 12. For example, a synchronizing belt 13 is attached to the plurality of rope drums 12 as a synchronizing member. One or more direction change devices 14 are provided in the machine room unit 3, for example. Fig. 1 to 5 show a case where two pulleys are provided as the direction conversion means 14.
The number of rope drums 12 corresponds to the number of ropes 8 used in the elevator. For example, when six ropes 8 are used in the elevator, six rope reels 12 are mounted in the machine room unit 3. The rope 8 having a length corresponding to the elevating stroke in the state where the building is completed is wound around the rope reel 12 in advance. The rotation of each rope reel 12 is synchronized by a synchronizing member.
The machine room unit 3 is provided with, for example, a coupling device 15 and a brake device 16. The coupling device 15 and the braking device 16 are provided at positions overlapping with the first vertically movable body 1, for example, when viewed in the vertical direction. The coupling device 15 and the braking device 16 are provided in the vicinity of a car guide rail or a counterweight guide rail, for example, in the horizontal direction. The coupling device 15 and the braking device 16 are provided at positions deviated to the end portion side of the machine room unit 3 in the horizontal direction.
The coupling device 15 can suspend the first vertically movable body 1. The connecting device 15 is a device having a hoisting function, such as a chain block or a winch. In a state where the first lifting body 1 is suspended by the coupling device 15, the load of the first lifting body 1 is supported by the machine room unit 3.
The braking device 16 can brake the rope 8 in a clamping manner, for example. The braking device 16 can simultaneously brake at least the same number of ropes 8 as the number of rope reels 12. The magnitude of the braking force applied to the rope 8 by the braking device 16 can be adjusted, for example, in stages.
The direction conversion device 14 is provided at the same position as the rope reel 12 or at a position higher than the rope reel 12 in the vertical direction, for example. The direction conversion device 14 is fixed to, for example, a frame of the machine room unit 3.
Each rope 8 fed from the plurality of rope reels 12 is, for example, initially wound around the direction conversion device 14. Each rope 8 passes through the braking device 16 after being wound around the direction conversion device 14, for example. Each rope 8 is wound around a sheave 6 of the first vertically movable body 1 after passing through a brake device 16, for example. Each rope 8 is wound around, for example, the hoist 6 of the first hoist 1 and then around the sheave 5 of the hoisting machine 4. The ropes 8 are wound around the sheave 5 of the hoisting machine 4 and then around the hoist sheave 7 of the second hoist 2, for example. Each rope 8 is connected to the machine room unit 3 after being wound around the hoist 7 of the second lifting body 2, for example.
The ends of the ropes 8 are connected to the machine room unit 3, for example by separate shackles. The shackle side rope ends 17 are located, for example, at the lower end of the machine room unit 3.
The braking device 16 can grip the rope 8 between the rope reel 12 and the hoist 6 of the first vertically movable body 1. In a state where the first vertically movable body 1 is not suspended by the coupling device 15 and the rope 8 is completely gripped by the brake device 16, the rope 8 receives loads of the first vertically movable body 1 and the second vertically movable body 2. In this state, when the traction machine 4 is driven, the first lifting body 1 and the second lifting body 2 move in a range below the machine room unit 3 of the building in the building. The range is a lifting stroke of the first lifting body 1 and the second lifting body 2 at the present time. The hoisting machine 4 is controlled by a control panel 11 mounted on the machine room unit 3, for example. The lifting stroke of the first and second lifting bodies 1 and 2 is extended according to the progress of the building construction.
Hereinafter, a method of extending the lift of the construction elevator will be described with reference to fig. 1 to 5.
The lift extension method for a construction elevator comprises a load removal process. In the load removing step, for example, as shown in fig. 1, the load of the first lifting body 1 is supported by the machine room unit 3 via the coupling device 15. In the load removing step, as shown in fig. 1, the load of the second vertically movable body 2 is supported at the lower portion of the hoistway. In the load removing step, the rope 8 is not subjected to the loads of the first vertically movable body 1 and the second vertically movable body 2.
The lift extension method for a construction elevator comprises a rope hanging change procedure. The rope hooking step is performed after the load removing step. In the rope hooking step, as shown in fig. 2, the rope 8 is hooked from the hanging wheel 7 of the second lifting body 2 to the rope lowering aid 18.
The rope lowering aid 18 is lighter in weight than the hoisting wheels 6 and 7. The rope lowering aid 18 can be raised and lowered in the hoistway along a car guide rail or a counterweight guide rail, for example. The rope lowering aid 18 can be fixed to a car guide rail or a counterweight guide rail, for example.
The lift extension method for a construction elevator comprises a lifting process. The lifting step is performed after the rope hanging step. In the raising step, for example, the machine room unit 3 is lifted up by a not-shown lifting device in a state where the rope 8 is completely gripped by the brake device 16. That is, in the raising step, the machine room unit 3 is raised without changing the length of the rope 8 located in the range from the hoist 6 of the first elevating unit 1 to the shackle-side rope end 17. The hoisting device for hoisting the machine room unit 3 is, for example, a tower crane or a winch or the like.
In the raising step, when the machine room unit 3 is raised, as shown in fig. 3, the first lifting/lowering body 1 and the rope lowering assistive device 18 are also raised by the raising amount of the machine room unit 3. The machine room unit 3 reaching the destination floor is fixed.
When the floor height of the building changes before and after the machine room unit 3 is raised, the first lifting body 1 is raised or lowered by a distance corresponding to the difference by the coupling device 15, and the first lifting body 1 is adjusted to an appropriate height.
The lift extension method of a construction elevator comprises an auxiliary tool descending process. The accessory lowering step is performed after the raising step. In the accessory lowering step, the state in which the rope 8 is completely gripped by the brake device 16 is released. In the accessory lowering step, the rope 8 is fed from the rope reel 12 by the weight of the rope lowering accessory 18 and the self weight of the rope 8, and the rope lowering accessory 18 is lowered. In the accessory lowering step, the braking force of the braking device 16 is adjusted so that the moving speed of the rope 8 does not excessively increase.
In the harness lowering process, when the rope lowering harness 18 is lowered, as shown in fig. 4, the length of the rope 8 positioned below the machine room unit 3 is increased. The rope lowering aid 18 is configured to have a "sheave-pushed state" by a rotation support portion 25 and a holder 26, which will be described later, and thereby the sheave portion can be lowered to the same height as the hanging sheave 7 of the second lifting body 2. This height is a height at which a rope reduction step described later can be performed. After the rope lowering aid 18 is lowered to the height, the rope lowering aid 18 is stabilized so that the sheave portion does not fall down even if it is not suspended by the rope 8, for example, by using a pressing portion 28 or a stopper, which will be described later.
The lift extension method for a construction elevator comprises a rope reduction process. The rope reducing process is performed after the auxiliary device descending process. In the rope restoring step, as shown in fig. 5, the rope 8 is re-hung from the rope lowering assistive device 18 to the hanging wheel 7 of the second vertically movable body 2.
The lift extension method for a construction elevator comprises a service recovery process. The service restoration process is performed after the rope restoration process. In the service restoration process, the rope lowering jig 18 is removed from the guide rail. In the service restoration process, the rope 8 is completely held by the braking device 16. In the service restoration process, the load of the first vertically movable body 1 and the second vertically movable body 2 is received by the rope 8. When the service resumption process is completed, the construction elevator in which the elevating stroke is extended can be operated.
The extension of the lifting stroke is repeated until the building is completed. The ropes 8 are used directly in the elevator after the building has been completed.
Fig. 6 and 7 are views showing a first example of the rope reel in embodiment 1.
Fig. 7 is a side view of a plurality of rope drums 12. Fig. 6 is a cross-sectional view a-a of the plurality of rope drums 12 shown in fig. 7. Fig. 6 and 7 illustrate a case where the number of rope reels 12 is six.
The rope drum 12 shown in fig. 6 and 7 is formed in a set of two. A group of rope reels 12 arranged in the front-rear direction have a common rotation axis. A synchronizing belt 13 is wound around three groups of rope drums 12 arranged in the vertical direction or the horizontal direction.
Fig. 8 and 9 are views showing a second example of the rope reel in embodiment 1.
Fig. 8 is a front view of a plurality of rope drums 12. Fig. 9 is a side view of a plurality of rope reels 12. Fig. 8 and 9 illustrate a case where the number of rope reels 12 is six.
A synchronizing arm 19 and a synchronizing bolt 20 are attached to the rope reel 12 shown in fig. 8 and 9 as synchronizing members. Each rope reel 12 is connected to another rope reel 12 arranged in the vertical direction or the horizontal direction by a synchronization arm 19. Each rope reel 12 is connected to another rope reel 12 arranged in the front-rear direction by a synchronization bolt 20.
Fig. 10 to 14 are schematic diagrams of a second example of a construction elevator to which the lift extension method in embodiment 1 is applied.
In the second example of the construction elevator shown in fig. 10 to 14, a plurality of rope reels 12 are installed in the pit without being mounted in the machine room unit 3. Therefore, the load when lifting the machine room unit 3 is smaller than the first example shown in fig. 1 to 5. In the second example, the order in which the rope 8 is wound around the direction switching device 14, the hoisting sheave 6 of the first lifting/lowering body 1, the sheave 5 of the hoisting machine 4, and the hoisting sheave 7 of the second lifting/lowering body 2 is the same as that in the first example shown in fig. 1 to 5. The method of extending the head described with reference to fig. 10 to 14 is the same as the method of extending the head described with reference to fig. 1 to 5, except that the rope 8 is fed from the rope reel 12 also in the raising step.
Fig. 15 is a front view of the rope lowering assistant in embodiment 1. Fig. 16 is a plan view of the rope lowering assistant in embodiment 1. Fig. 17 is a side view of the rope descending aid in embodiment 1. Fig. 15 to 17 show the "sheave suspension state" of the rope lowering accessory 18.
Fig. 18 is a front view of the rope lowering assistant in embodiment 1. Fig. 19 is a plan view of the rope lowering aid according to embodiment 1. Fig. 20 is a side view of the rope lowering assistant in embodiment 1. Fig. 18 to 20 show the "sheave pushed-out state" of the rope lowering assist 18.
The rope lowering auxiliary device 18 includes a sheave 21, a mounting tool 22, a sheave mounting arm 23, a pair of guide portions 24, a rotation support portion 25, and a holder 26. A plurality of ropes 8 can be wound around the sheave 21.
The rotation shaft 21a of the sheave 21 is disposed in a direction perpendicular to the longitudinal direction of the sheave mounting arm 23, for example, when viewed in the vertical direction. The rotating shaft 21a is fixed to a lower end portion of the mounting member 22. A shaft 25a and a shaft 25b are provided at both ends of the rotation support portion 25. The shafts 25a and 25b are disposed along the longitudinal direction of the sheave mounting arm 23, for example, when viewed from the top-bottom direction. The upper end of the mounting member 22 is coupled to the lower end of the rotation support portion 25 via a shaft 25a, for example. The upper end of the rotation support portion 25 is coupled to the lower protruding portion 23a of the sheave mounting arm 23 via a shaft 25b, for example. In the sheave suspended state, the mount 22 is supported by the sheave mounting arm 23 via the rotation support portion 25. In the sheave suspended state, the sheave 21 is located directly below the sheave mounting arm 23.
The shafts 25a and 25b are each mounted so as to be free in the rotational direction. The rotation support portion 25 is at least rotatable and movable to be horizontal. When the rotation support portion 25 is rotationally moved, the sheave 21 and the attachment 22 are also pushed out in the horizontal direction in accordance with the movement. At this time, since the shafts 25a and 25b are free in the rotational direction, the postures of the sheave 21 and the guide portion 24 are not affected by the rotation of the rotation support portion 25.
The lower end of the holder 26 is formed, for example, in a hook shape. A shaft 26a is provided at the upper end of the holder 26, for example, so as to be rotatable. The shaft 26a is disposed along the longitudinal direction of the sheave mounting arm 23, for example, when viewed in the vertical direction. The upper end of the holder 26 is coupled to the sheave mounting arm 23 via a shaft 26a, for example. For example, the rope lowering assistive device 18 is brought into the sheave pushing-out state shown in fig. 18 to 20 by horizontally moving the rotation support portion 25 and hooking the lower end of the holder 26 to the shaft 25 a. In the sheave pushed-out state, the mount 22 is supported by the sheave mounting arm 23 via the rotation support portion 25 and the holder 26.
The structure of the holder 26 for maintaining the sheave pushed-out state of the rope lowering assistive device 18 is not limited to the structure shown in fig. 15 to 20. For example, a wire or the like connecting the sheave mounting arm 23 and the shaft 25a may be used as the holder 26.
The upper and lower surfaces of the sheave mounting arm 23 are formed with two notches 23b for avoiding interference with the rope 8. The cutout 23b is formed toward the side where the holder 26 is provided in the front-rear direction. Due to the presence of the cutout 23b, the rope 8 can pass up and down through the sheave mounting arm 23 even in the state where the sheave is suspended. The rope 8 passes through the slit 23b and is wound around the sheave 21 from below. The incision 23b has the following dimensions: in any one of the state where the rope 8 is hooked on the sheave 21 and the state where the rope 8 is hooked on the suspending sheave 7 of the second hoisting body 2, the rope 8 can pass through the sheave mounting arm 23. The position and lateral width of the notch 23b in the longitudinal direction of the sheave mounting arm 23 are set, for example, according to the diameter of the sheave 21 and the diameter of the hanging sheave 7 of the second vertically movable body 2.
The pair of guide portions 24 are coupled to both ends of the sheave mounting arm 23 in the longitudinal direction. The pair of guide portions 24 face each other in the longitudinal direction of the sheave mounting arm 23. The pair of guide portions 24 are guided by a pair of guide rails 27 provided in the hoistway. The guide rail 27 is, for example, a car guide rail or a counterweight guide rail. The guide 24 is guided by the core of the guide rail 27 via a plurality of rollers, for example. In a state where the guide portion 24 is guided by the guide rails 27, the sheave mounting arm 23 and the guide portion 24 are positioned in a space between the pair of guide rails 27 facing each other.
One of the guide portions 24 is indirectly coupled to the sheave mounting arm 23 via the pressing portion 28. One of the end portions of the sheave mounting arm 23 is connected to the pressing portion 28 by a jack-up bolt 29. The pressing portion 28 and the jack-up bolt 29 are examples of a mechanism for pressing the guide portion 24 against the guide rail 27 so that the position of the sheave 21 is fixed to the guide rail 27 at an arbitrary height. The guide portion 24 is pressed against the guide rail 27 by the rotation of the jack-up bolt 29, whereby the rope lowering aid 18 can be fixed. For example, when the jack-up bolt 29 is tightened, the force pressing the guide portion 24 against the guide rail 27 is increased. For example, when the jack-up bolt 29 is loosened, the force pressing the guide portion 24 against the guide rail 27 is weakened.
The rope lowering aid 18 may include a stopper, not shown, for example. The stopper is, for example, a member that can be stably disposed above the second vertically movable body 2 in a state where the sheave 21 is in contact with the hanging sheave 7 of the second vertically movable body 2. When the stopper comes into contact with the second elevating body 2, further lowering of the sheave 21 is suppressed.
The rope lowering aid 18 can realize a state change from the sheave suspension state to the sheave push-out state or a state change opposite thereto using the rotation support portion 25 and the holder 26. In the sheave suspended state, the sheave 21 is positioned in a space between the pair of guide portions 24 facing each other when viewed in the up-down direction. In the sheave pushed-out state, the sheave 21 is not positioned in a space between the pair of guide portions 24 facing each other when viewed in the up-down direction. In the rope re-hanging step and the rope restoring step, the rope lowering jig 18 is operated in the sheave-pushed state. In the raising step and the auxiliary tool lowering step, the rope lowering auxiliary tool 18 may be in a sheave-pushed state or in a sheave-suspended state. In this case, for example, the state of the rope lowering aid 18 may be determined according to the installation condition of the equipment in the hoistway. The amount of the sheave 21 to be pushed out is set, for example, according to the thickness of the sheave 21 and the thickness of the hoist sheave 7 of the second vertically movable body 2.
Fig. 21 to 26 are diagrams for explaining a rope hooking step and a lifting step in embodiment 1.
Fig. 21 to 26 show both a front view and a side view of the second lifting/lowering body 2 supported at a lower portion of the hoistway. The rope hooking step and the raising step will be described in detail below with reference to fig. 21 to 26.
The rope hitch step includes a step of disposing the rope lowering assistive device 18 between the guide rails 27 of the second vertically movable body 2. In this step, for example, as shown in fig. 21 and 22, the rope lowering assistive device 18 is fixed to the guide rail 27 at a position spaced above the counterweight. When the counterweight is viewed from the front, the rope lowering assistor 18 is provided so as to be able to push the sheave 21 toward the front side of the counterweight. When the counterweight is viewed from the front, the rope lowering aid 18 is disposed so that the notch 23b of the sheave mounting arm 23 faces the front side of the counterweight. In this step, after the rope lowering aid 18 is set, the rope 8 wound around the hoist wheel 7 passes through the slit 23 b. In this case, if the rope lowering aid 18 is in the sheave-suspended state, the notch 23b overlaps the end of the outer circumferential surface of the sheave 21 and the end of the outer circumferential surface of the hanging sheave 7 when viewed in the vertical direction.
The rope hitch step includes a step of preparing to remove the rope 8 from the hoist wheel 7 of the second vertically movable body 2. In this step, for example, as shown in fig. 23, the upper frame 30 on the near side of the counterweight is removed. In this step, for example, as shown in fig. 23, the rope lowering assistive device 18 is in the sheave-pushed state.
The rope re-hanging step includes a step of aligning the rope lowering auxiliary device 18 with the hanging wheel 7 of the second vertically movable body 2. In this step, for example, as shown in fig. 24, the rope lowering aid 18 is moved so that the lower end of the sheave 21 becomes the same height as the lower end of the hoist 7. Then, the rope lowering auxiliary device 18 is held in a state where the sheave 21 is alongside the hoist wheel 7. In this state, in order to hold the rope lowering aid 18, for example, the rope lowering aid 18 may be fixed to the guide rail 27 by tightening the jack-up bolt 29. In this state, in order to hold the rope lowering assistive device 18, for example, the stopper is brought into contact with the upper portion of the second lifting/lowering body 2, thereby suppressing the lowering of the rope lowering assistive device 18.
The rope hooking step includes a step of hooking a plurality of ropes 8 at a time. In this step, for example, as shown by arrows in fig. 25, the plurality of ropes 8 taken down from the hoisting sheave 7 on the rear side are moved to the sheave 21 on the front side. In addition, in order to remove the ropes 8 from the hoist 7, it is necessary to loosen the ropes 8 between the traction machine 4 and the shackle side rope ends 17. In order to loosen the rope 8, the first lifting body 1 can be lifted up using the coupling device 15, for example. To loosen the rope 8, the nut of the shackle side rope end 17 can be rotated, for example.
After the rope 8 is moved to the sheave 21, the raising step is performed. In the raising step, as shown in fig. 26, the rope lowering aid 18 suspended from the rope 8 is raised along the guide rail 27. In this case, the state of the sheave 21 may be either the pushed-out state or the suspended state, but when the sheave 21 is vertically suspended and the raising step is performed, it is necessary to remove the holder 26 from the shaft 25b and move the rotation support portion 25 from the horizontal direction to the vertical direction.
Fig. 27 is a flowchart for explaining the steps of the head extension method in embodiment 1. An example of the procedure of the lift extension method will be described below with reference to fig. 27.
In step S101, the worker performs a load removal process. Then, the worker performs the process of step S102. In step S102, the operator performs a rope hooking process. Then, the worker performs the process of step S103. In step S103, the worker performs the raising step. Then, the worker performs the process of step S104. In step S104, the worker performs the accessory lowering process. Then, the worker performs the process of step S105. In step S105, the worker performs a rope reducing process. Then, the worker performs the process of step S106. In step S106, the worker performs a service resumption process. As a result, the lift extension work of the construction elevator is completed.
According to embodiment 1 described above, the method for extending the lift of the construction elevator includes the rope hooking step, the raising step, the accessory lowering step, and the rope restoring step. The rope hooking step is a step of hooking the rope 8 from the hanging wheel 7 of the second lifting body 2 to the rope lowering auxiliary 18 having a weight smaller than that of the hanging wheel 7 of the second lifting body 2. The raising step is a step of raising the machine room unit 3 after the rope hitch step. The assistive device lowering step is a step of lowering the rope lowering assistive device 18 by feeding the rope 8 from the plurality of rope reels 12 after the raising step. The rope restoring step is a step of re-hanging the rope 8 from the rope lowering assistive device 18 to the hanging wheel 7 of the second lifting body 2 after the assistive device lowering step. Therefore, the braking force required to control the movement amount and speed of the rope 8 when the lifting stroke of the construction elevator is extended can be reduced. As a result, for example, the brake device 16 can be downsized and the safe head extension work can be realized.
In the raising step, for example, the machine room unit 3 is lifted up in a state where the load of the first lifting body 1 is supported by the machine room unit 3. In this case, since the lifting operation is completed at one time, the operation time can be shortened.
In the load removing step, for example, the first vertically movable body 1 may be fixed to a guide rail or the like without using the coupling device 15. In this case, in the raising step, for example, after the machine room unit 3 is lifted up in a state where the load of the first lifting body 1 is not supported by the machine room unit 3, the first lifting body 1 is lifted up using the coupling device 15. In this case, the load when lifting the machine room unit 3 can be reduced.
The plurality of rope reels 12 are rotated in synchronization by the synchronization member. Therefore, the amount of feed of each rope 8 can be prevented from varying.
The rope lowering assistive device 18 includes a sheave mounting arm 23, a pair of guide portions 24, a rotation support portion 25, and a holder 26. The sheave mounting arm 23 supports the sheave 21 at a position above the sheave 21. The pair of guide portions 24 are coupled to both ends of the sheave mounting arm 23 in the longitudinal direction, guided by a pair of guide rails 27 provided in the hoistway, and can be fixed to the pair of guide rails 27. Since the rope lowering aid 18 can be changed from the sheave suspension state to the sheave push-out state by using the rotation support portion 25 and the holder 26, the rope suspending process can be performed in a state where the sheave 21 is in contact with the hanging sheave 7.
Further, since the sheave 21 can be moved in the direction of the rotation axis of the sheave 21 by the rotation support portion 25, when the rope lowering aid 18 is inserted obliquely between the guide rails 27, interference between the sheave 21 and the guide rails 27 can be avoided. Therefore, the rope 8 can be easily hung from the hanging wheel 7 without requiring an operation of attaching and detaching the parts of the rope lowering aid 18.
Industrial applicability
The present invention can be applied to lift extension work of an elevator for construction.
Description of the reference symbols
1: a first elevating body;
2: a second lifting body;
3: a machine room unit;
4: a traction machine;
5: a sheave;
6: a hoisting wheel;
7: a hoisting wheel;
8: a rope;
9: a buffer;
10: a buffer;
11: a control panel;
12: a rope drum;
13: a synchronization belt;
14: a direction conversion device;
15: a connecting device;
16: a braking device;
17: shackle side cord ends;
18: a rope descent aid;
19: a synchronization arm;
20: a synchronization bolt;
21: a sheave;
21 a: a rotating shaft;
22: a mounting member;
23: a sheave mounting arm;
23 a: a lower protrusion;
23 b: cutting;
24: a guide section;
25: a rotation support;
25 a: a shaft;
25 b: a shaft;
26: a holder;
26 a: a shaft;
27: a guide rail;
28: a pressing part;
29: a self-elevating bolt;
30: and (6) putting the frame on.
Claims (4)
1. A method for extending the lift of a construction elevator in which ropes fed from a plurality of rope reels are wound around a sheave of a hoisting machine mounted in a machine room unit that is capable of ascending and descending in a hoistway, a hoisting sheave of a first vertically movable body capable of supporting the load of the first vertically movable body, and a hoisting sheave of a second vertically movable body capable of supporting the load of the second vertically movable body at a lower portion of the hoistway,
the lift extension method for the construction elevator comprises the following steps:
a rope re-hanging step of re-hanging a rope from the hanging wheel of the second lifting body to a rope lowering auxiliary tool having a weight smaller than that of the hanging wheel of the second lifting body;
a lifting step of lifting the machine room unit after the rope hanging-up step;
an accessory lowering step of lowering the rope lowering accessory by feeding a rope from the plurality of rope reels after the raising step; and
and a rope restoring step of, after the assist lowering step, re-hanging the rope from the rope lowering assist to the hanging wheel of the second lifting body.
2. The method for extending the head of a construction elevator according to claim 1,
in the raising step, the machine room unit is raised in a state where the load of the first elevating body is supported by the machine room unit.
3. The method for extending the head of a construction elevator according to claim 1,
in the raising step, the machine room unit is raised in a state where the load of the first lifting body is not supported by the machine room unit, and then the first lifting body is raised.
4. The method for extending the head of a construction elevator according to any one of claims 1 to 3,
the plurality of rope drums are rotated in synchronization.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/030443 WO2020035930A1 (en) | 2018-08-16 | 2018-08-16 | Construction elevator lifting height extension method and elevator rope lowering jig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112533855A CN112533855A (en) | 2021-03-19 |
| CN112533855B true CN112533855B (en) | 2022-06-03 |
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|---|---|---|---|
| CN201880095754.6A Active CN112533855B (en) | 2018-08-16 | 2018-08-16 | Method for extending lift of construction elevator and rope descending auxiliary tool for elevator |
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| Country | Link |
|---|---|
| JP (1) | JP6969686B2 (en) |
| CN (1) | CN112533855B (en) |
| WO (1) | WO2020035930A1 (en) |
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| WO2021186492A1 (en) * | 2020-03-16 | 2021-09-23 | 株式会社日立製作所 | Construction elevator device and governor rope extension method for elevator |
| CN113620147A (en) | 2020-05-09 | 2021-11-09 | 奥的斯电梯公司 | Jump elevator system and jump method used in building construction |
| WO2024069711A1 (en) * | 2022-09-26 | 2024-04-04 | 三菱電機ビルソリューションズ株式会社 | Elevator main cable replacement method and replacement assisting tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000344440A (en) * | 1999-06-04 | 2000-12-12 | Hitachi Building Systems Co Ltd | Method of operation for hanging main rope of 2:1 roping elevator and main rope guide device therefor |
| CN1336900A (en) * | 1999-02-24 | 2002-02-20 | 通力股份公司 | Elevator system |
| WO2017183189A1 (en) * | 2016-04-22 | 2017-10-26 | 三菱電機株式会社 | Elevator rope guidance device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48110870U (en) * | 1972-03-28 | 1973-12-20 | ||
| JPS5161934A (en) * | 1974-11-25 | 1976-05-28 | Koshihara Tetsukosho Kk | ROOPUMAKIAGESHIKISHOKOSOCHINIOKERU MASUTOCHOBUKATSUSHASHIJISOCHI |
| JPS52113968U (en) * | 1976-02-25 | 1977-08-30 |
-
2018
- 2018-08-16 WO PCT/JP2018/030443 patent/WO2020035930A1/en active Application Filing
- 2018-08-16 JP JP2020537336A patent/JP6969686B2/en active Active
- 2018-08-16 CN CN201880095754.6A patent/CN112533855B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336900A (en) * | 1999-02-24 | 2002-02-20 | 通力股份公司 | Elevator system |
| JP2000344440A (en) * | 1999-06-04 | 2000-12-12 | Hitachi Building Systems Co Ltd | Method of operation for hanging main rope of 2:1 roping elevator and main rope guide device therefor |
| WO2017183189A1 (en) * | 2016-04-22 | 2017-10-26 | 三菱電機株式会社 | Elevator rope guidance device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020035930A1 (en) | 2020-02-20 |
| CN112533855A (en) | 2021-03-19 |
| JPWO2020035930A1 (en) | 2021-02-15 |
| JP6969686B2 (en) | 2021-11-24 |
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