CN112566864B - Application method of lift extension technology of elevator - Google Patents

Abstract

Provided is a method for applying lift extension technology of an elevator, which can eliminate the restriction of the maximum height capable of providing service through the elevator. The application method of the lift extension technology of the elevator comprises the following steps: a 1 st elevation stroke extension step of raising a relative position of the machine room unit (3) with respect to a pit unit (7), the pit unit (7) carrying at least one of a car buffer (8) and a counterweight buffer (9) and being capable of elevating in the hoistway below the machine room unit (3); a lifting stroke moving step of moving a lifting stroke according to the progress of building construction by lifting the pit unit (7) in a direction in which a machine room unit (3) on which the temporary setting hoisting machine (4) is mounted is lifted; and a 2 nd lifting stroke extension step of setting a tractor (14) for formal installation, and lowering the position of the pit unit (7) or setting a pit device for new installation.

Description

Application method of lift extension technology of elevator

Technical Field

The invention relates to an application method of lift extension technology of an elevator.

Background

The lift extension elevator is an elevator in which the lift stroke of a car is sequentially extended according to the progress of building construction. In a lift extension type elevator, a machine room unit on which a hoisting machine is mounted is raised in a hoistway to extend a lift stroke of a car. According to the elevator, the operators, materials and the like in the building construction can be efficiently conveyed. An example of a lift extension type elevator is disclosed in patent document 1.

Documents of the prior art

Patent document

Patent document 1: european patent specification No. 2804828

Disclosure of Invention

Problems to be solved by the invention

There is a limit value for the hoisting stroke of the elevator corresponding to the capacity of the hoisting machine. Due to the restriction of the space in which the machine room unit can be disposed in the hoistway, it is not possible to mount a large-sized hoisting machine in the machine room unit. Therefore, in a high-rise building, there is a limit to the maximum height at which service can be provided by the lift-extended elevator.

The present invention has been made to solve the above problems. The application method of lift extension technology of the elevator can eliminate the limitation of the maximum height capable of providing service through the elevator.

Means for solving the problems

The application method of the lift extension technology of the elevator comprises the following lifting stroke moving working procedures: in a lift extension type elevator, a pit unit on which at least one of a car buffer and a counterweight buffer is mounted is raised in a direction in which a machine room unit on which a hoisting machine is mounted is raised, and a lifting stroke is moved according to the progress of construction.

Effects of the invention

According to the present invention, in the up-down stroke moving step, the pit unit is raised in the direction in which the machine room unit is raised. Therefore, the restriction of the maximum height at which the elevator can provide service can be eliminated.

Drawings

Fig. 1 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 rope winding ratio is shown).

Fig. 2 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 rope winding ratio is shown).

Fig. 3 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 rope winding ratio is shown).

Fig. 4 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 rope winding ratio is shown).

Fig. 5 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 rope winding ratio is shown).

Fig. 6 is a schematic diagram for explaining a method of applying the lift extension technique of the elevator in embodiment 1 (a case of 2: 1 roping ratio is shown).

Fig. 7 is a front view showing a 1 st example of the pit unit in embodiment 1.

Fig. 8 is a view from a-a of fig. 7.

Fig. 9 is a view from B-B of fig. 7.

Fig. 10 is a view in the direction of C-C of fig. 7.

Fig. 11 is a front view showing a pit unit of example 2 in embodiment 1.

Fig. 12 is a view from a-a of fig. 11.

Fig. 13 is a view in the direction of C-C of fig. 11.

Fig. 14 is a front view showing a pit unit of example 3 in embodiment 1.

Fig. 15 is a view from direction a-a of fig. 14.

Fig. 16 is a view from B-B of fig. 14.

Fig. 17 is a view in the direction of C-C of fig. 14.

Fig. 18 is a front view showing a 4 th example of the pit unit in embodiment 1.

Fig. 19 is a view from direction a-a of fig. 18.

Fig. 20 is a view in the direction of C-C of fig. 18.

Fig. 21 is a flowchart for explaining a procedure of a method of applying the lift extension technique of an elevator in 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.

Embodiment 1.

Fig. 1 to 6 are schematic diagrams for explaining a method of applying the lift extension technique of an elevator in embodiment 1. Although the roping pattern is illustrated as 2 in fig. 1 to 6: 1 rope winding ratio, however, the application method of the lift extension technique of the elevator can also be applied to a rope winding method of 1: 1 cord ratio.

Fig. 1 to 6 show a situation within a hoistway of a building under construction. For example, as shown in fig. 1, an extended-lift elevator includes a car 1, a counterweight 2, a machine room unit 3, a temporary installation hoisting machine 4, a plurality of ropes 5, and a control panel 6. The temporary installation hoisting machine 4 is, for example, a small hoisting machine that is not compatible with a high stroke.

The car 1 can be raised and lowered in the hoistway while being guided by a pair of car guide rails. The car 1 can be fixed to a car guide rail, for example. The counterweight 2 can be raised and lowered in the hoistway while being guided by a pair of pairs of counterweight guide rails. The counterweight 2 can be fixed to a counterweight guide rail, for example.

The machine room unit 3 can be raised and lowered in the hoistway under guidance of at least one of the car guide rail and the counterweight guide rail, for example. The machine room unit 3 can be fixed to at least one of the car guide rail and the reuse guide rail, for example. The machine room unit 3 may be fixed to a structure on the building side under construction, for example. The structure is also referred to as a building structure.

The machine room unit 3 is mounted with, for example, a temporary installation hoisting machine 4 and a control panel 6. The plurality of ropes 5 are wound around, for example, a sheave where the hoisting machine 4 is temporarily installed, a suspension sheave of the car 1, and a suspension sheave of the counterweight 2. The ends of the ropes 5 are connected to the machine room unit 3, for example by shackles. The termination of the ropes 5 is located e.g. at the lower end of the machine room unit 3. In addition, in the rope winding method 1: in the case of 1 roping ratio, the terminal ends of the ropes 5 are connected to the car 1 and the counterweight 2 by, for example, a shackle, without providing a suspension sheave of the car 1 and a suspension sheave of the counterweight 2.

A pit unit 7 is provided below the machine room unit 3. At least one of a car buffer 8 and a counterweight buffer 9 is mounted on the pit unit 7, for example. The car buffer 8 is located directly below the car 1. The counterweight buffer 9 is located directly below the counterweight 2.

The pit unit 7 may be equipped with a compensating sheave, not shown, for example. A compensating rope is wound around the compensating sheave, for example, and connects a lower portion of the car 1 and a lower portion of the counterweight 2. The pit unit 7 may be mounted with a car tension pulley, not shown, for example. A car speed governor rope is wound around the car tension pulley, for example. The pit unit 7 may be equipped with, for example, a counterweight tensioning pulley, not shown. A counterweight governor rope is wound around the counterweight tensioning sheave, for example.

The pit unit 7 can be guided by at least one of the car guide rail and the reuse guide rail to move up and down in the hoistway, for example. The pit unit 7 can be fixed to at least one of the car guide rail and the reuse guide rail, for example. The pit unit 7 may be fixed to a structure on the building side under construction, for example. The structure is also referred to as a building structure.

When the hoisting machine 4 is temporarily installed and driven in a state where the loads of the car 1 and the counterweight 2 are received by the ropes 5, the car 1 and the counterweight 2 move within a range below the machine room unit 3 and above the pit unit 7 in the building under construction. This range is the lift stroke of the car 1 and the counterweight 2 at the present time. The temporary installation hoisting machine 4 is controlled by, for example, a control panel 6 mounted on the machine room unit 3. The lift stroke of the car 1 and the counterweight 2 is extended according to the progress of the construction.

Hereinafter, an application method of the lift extension technique of the elevator will be described with reference to fig. 1 to 6.

The application method of the lift extension technology of the elevator comprises a 1 st lifting stroke extension procedure. In the 1 st elevation stroke extension step, the relative position of the machine room unit 3 with respect to the pit unit 7 is pulled up. In the 1 st elevation stroke lengthening process, for example, the machine room unit 3 is pulled up to the vicinity of the upper floor being constructed at the present time using the lifting device 10. Fig. 1 illustrates a case where the 1 st elevation stroke extension step is performed in a state where the pit unit 7 is installed in a pit of a hoistway.

The hoisting device 10 used for the pulling-up of the machine room unit 3 is, for example, a tower hoist or a winch or the like. The hoisting device 10 pulls up the machine room unit 3, for example, by means of a hoisting rope 11 mounted to the machine room unit 3.

When the machine room unit 3 is raised in the 1 st elevation stroke extension process, as shown in fig. 2, the elevation stroke is extended. The machine room unit 3 to be brought to the destination height is fixed. Fig. 2 illustrates a case where the lifting stroke is extended to the maximum lifting stroke to which the temporary setting hoisting machine 4 can be applied. In the figure, this maximum lift stroke is marked as "max.tr".

The rope 5 is for example replaced with a longer rope each time the lifting stroke is extended. For example, when the rope 5 is wound around a hoisting machine 4 for temporary installation from a rope reel not shown, the rope 5 may be fed out from the rope reel according to an extended lifting stroke.

In the state of fig. 2, the elevator can provide service in a range from, for example, the lowest floor to the vicinity of the upper floor on which construction is currently being performed.

The application method of the lift extension technology of the elevator comprises a lifting stroke moving process. The lift stroke moving step is performed in a state where the machine room unit 3 can be further raised according to the progress of the construction. In the lift stroke moving step, the machine room unit 3 and the pit unit 7 are moved in the same direction in the vertical direction.

Fig. 3 illustrates a state where the machine room unit 3 and the pit unit 7 are connected by the connecting rope 12, and the machine room unit 3 is pulled up by the hoisting device 10. That is, fig. 3 illustrates a case where the machine room unit 3 and the pit unit 7 are lifted at the same time in the lift stroke moving step. In this case, even if the pit unit 7 is equipped with a compensating sheave, the compensating rope does not need to be detached from the compensating sheave.

In the up-down stroke moving step, for example, the machine room unit 3 and the pit unit 7 may be lifted up without using the connecting rope 12. For example, when the pit unit 7 does not have the compensating sheave mounted thereon, one of the machine room unit 3 and the pit unit 7 may be pulled up, and then the other may be pulled up. The lifting of the pit unit 7 may also be performed using the lifting device 10. The pulling up of the pit unit 7 may also use a chain block or a winch or the like provided in the machine room unit 3.

For example, when the pit unit 7 is mounted with the compensating sheave, the machine room unit 3 may be pulled up in the up-down stroke moving step in a state where the compensating rope is detached from the compensating sheave, and then the pit unit 7 may be pulled up again. In this case, the machine room unit 3 or the pit unit 7 can be raised to the target height by one lifting operation. However, in this case, after the pit unit 7 is pulled up, the compensating ropes need to be rewound around the compensating sheaves.

For example, when the pit unit 7 is mounted with a compensating sheave, the pit unit 7 may be pulled up and then the machine room unit 3 may be pulled up in the lift stroke moving step in a state where the compensating rope is wound around the compensating sheave and the lower portion of the car 1 and the lower portion of the counterweight 2 are positioned at the same height. In this case, the compensating ropes are temporarily loosened, but it is not necessary to remove the compensating ropes from the compensating sheave. However, in this case, since the distance that the machine room unit 3 or the pit unit 7 can be raised by one lifting operation is limited, a plurality of lifting operations may be required.

In the lift stroke moving step, when the machine room unit 3 and the pit unit 7 are raised, the lift stroke itself is raised as shown in fig. 4. The machine room unit 3 and the pit unit 7 reaching the target height are fixed, respectively.

As shown in fig. 5, the lift stroke can be maintained at max.tr even after the lift stroke moving step. In the state of fig. 5, the elevator can provide service to the upper floor with the raised pit unit 7 as a temporary pit. In the state of fig. 5, the elevator cannot serve floors below the pit unit 7. However, in the construction progress stage shown in fig. 5, since the operation of the other elevator for the lower floor is already started, there is no significant obstacle.

By repeating the lifting stroke moving step described with reference to fig. 3 to 5, the lifting stroke of the elevator can be moved upward while maintaining the maximum lifting stroke to which the temporary-setting hoisting machine 4 can be applied.

The application method of the lift extension technology of the elevator comprises a 2 nd lifting stroke extension procedure. The 2 nd lifting stroke extending process includes a formal setting tractor setting process and a pit equipment setting process. The hoisting machine installation step for main installation is performed after the completion of the construction period, for example. In the main installation hoisting machine installation step, as shown in fig. 6, the machine room unit 3 and the temporary installation hoisting machine 4 are removed, and the main installation hoisting machine 14 is installed in the machine room 13. In the pit equipment installation step, for example, as shown in fig. 6, the pit unit 7 is lowered to the lowermost part of the hoistway. In this case, the pit unit 7 is used as a pit facility for the main installation. In the pit equipment installation step, the pit unit 7 used as a temporary installation purpose in the construction work may be removed, and pit equipment for the main installation different from the pit unit 7 may be newly installed. When the 2 nd elevating stroke extending process is completed, the elevator service can be provided from the lowest floor to the uppermost floor of the building.

The hoisting machine 14 for main installation is, for example, a large hoisting machine corresponding to a high stroke. In a high-rise building, since a machine room 13 larger than a hoistway is prepared, a large hoisting machine 14 for main installation can be installed. As the control panel of the hoisting machine 14 for main installation, the control panel 6 mounted on the machine room unit 3 may be used, or another control panel may be used.

Fig. 7 is a front view showing a 1 st example of the pit unit in embodiment 1. Fig. 8 is a view from a-a of fig. 7. Fig. 9 is a view from B-B of fig. 7. Fig. 10 is a view in the direction of C-C of fig. 7.

Hereinafter, the structure of pit unit 7 according to example 1 will be described with reference to fig. 7 to 10. In this description, front, rear, left, and right are designated with the front side in fig. 7 as the front and the back side in fig. 7 as the back.

In example 1 of the pit unit 7, a compensating sheave 15 is mounted. The compensating sheave 15 is arranged inside the housing 16. A compensating rope 17 is wound around the compensating sheave 15.

The pit unit 7 of example 1 includes a car-side buffer base 18, a counterweight-side buffer base 19, a car-side buffer support base 20, a counterweight-side buffer support base 21, a car-side buffer support beam 22, a counterweight-side buffer support beam 23, a buffer base connection beam 24, a compensating sheave rail support beam 25, a compensating sheave rail 26, a car-side 1 st guide portion 27, a counterweight-side 1 st guide portion 28, a car-side 2 nd guide portion 29, and a counterweight-side 2 nd guide portion 30.

The car-side buffer table 18 is disposed between the pair of car guide rails 31 along the front-rear direction. The car-side buffer table 18 supports a car-side buffer support table 20. The car-side buffer support base 20 supports the car buffer 8. In accordance with the layout of pit equipment, when the car-side buffer support base 20 is not disposed, the car-side buffer base 18 directly supports the car buffer 8.

The counterweight-side buffer table 19 is disposed between the pair of counterweight guide rails 32 along the front-rear direction. The counterweight-side buffer base 19 supports a counterweight-side buffer support base 21. The counterweight-side buffer support base 21 supports the counterweight buffer 9. In accordance with the layout of pit equipment, when the counterweight-side buffer support base 21 is not disposed, the counterweight-side buffer base 19 directly supports the counterweight buffer 9.

The car-side cushion support beam 22 is disposed above the car-side cushion base 18 along the front-rear direction. The car-side buffer support beam 22 supports the car buffer 8 from the left side.

The counterweight-side cushion support beam 23 is disposed above the counterweight-side cushion base 19 along the front-rear direction. The counterweight-side buffer support beam 23 supports the counterweight buffer 9 from the right side.

The pair of buffer table connecting beams 24 connect the upper surface of the car-side buffer table 18 and the upper surface of the counterweight-side buffer table 19 in the left-right direction. One buffer table connecting beam 24 is disposed forward of the car buffer 8 and the counterweight buffer 9. The other buffer table connecting beam 24 is disposed rearward of the car buffer 8 and the counterweight buffer 9.

The pair of compensating sheave rail support beams 25 connect the car-side buffer support beam 22 and the counterweight-side buffer support beam 23 in the left-right direction. One compensating sheave rail support beam 25 is disposed forward of the car buffer 8 and the counterweight buffer 9. The other compensating sheave rail support beam 25 is disposed rearward of the car buffer 8 and the counterweight buffer 9.

The pair of compensating sheave rails 26 are supported by the pair of buffer table connecting beams 24 and the pair of compensating sheave rail support beams 25 in the vertical direction. The casing 16 of the compensating sheave 15 is guided along a compensating sheave rail 26.

The pair of car-side 1 st guide portions 27 are provided at both ends of the car-side buffer base 18. The car-side 1 st guide portion 27 is guided by a car guide rail 31.

A pair of counterweight-side 1 st guide portions 28 are provided at both ends of the counterweight-side buffer base 19. The counterweight-side 1 st guide portion 28 is guided by the counterweight guide rail 32.

The pair of car-side 2 nd guide portions 29 are provided at both ends of the car-side buffer support beam 22. The car-side 2 nd guide portion 29 is guided by a car guide rail 31.

A pair of counterweight-side 2 nd guide portions 30 are provided at both ends of the counterweight-side shock absorber support beam 23. The counterweight-side 2 nd guide portion 30 is guided by a counterweight guide rail 32.

The pit unit 7 is provided with a load support device 33. The load bearing means 33 is used to fix the pit unit 7 in the hoistway.

The load support device 33 in example 1 of the pit unit 7 includes, for example, a tubular member 33a and a slide member 33 b. The tubular member 33a is fixed to the lower surface of the car-side buffer table 18 and the lower surface of the heavy-side buffer table 19 in the left-right direction. The cylindrical member 33a is disposed below the bumper base coupling beam 24, for example. The sliding member 33b is inserted into the cylindrical member 33 a. The sliding member 33b can be completely accommodated inside the cylindrical member 33a, for example. The sliding member 33b can protrude at least partially from the cylindrical member 33a, for example.

As shown in fig. 7, the sliding member 33b protruding from the cylindrical member 33a is supported by, for example, a landing floor 34 or a structure on the building side under construction. The pit unit 7 is fixed in the hoistway by supporting a load by the load supporting device 33. When the pit unit 7 is lifted, the support by the load supporting means 33 is released. The load support device 33 may include a hanger such as an eye bolt connected to the hoist rope 11 or the connecting rope 12 when the pit unit 7 is lifted.

Fig. 11 is a front view showing a pit unit of example 2 in embodiment 1. Fig. 12 is a view from a-a of fig. 11. Fig. 13 is a view in the direction of C-C of fig. 11.

Hereinafter, the structure of pit unit 7 according to example 2 will be described, focusing on differences from example 1 shown in fig. 7 to 10, with reference to fig. 11 to 13.

In example 2 of the pit unit 7, the compensating sheave 15 is not mounted. The pit unit 7 of example 2 does not include a car-side buffer support base 20, a counterweight-side buffer support base 21, a car-side buffer support beam 22, a counterweight-side buffer support beam 23, a buffer base connection beam 24, a compensating sheave rail support beam 25, a compensating sheave rail 26, a car-side 2 nd guide portion 29, and a counterweight-side 2 nd guide portion 30.

In example 2 of the pit unit 7, the car buffer 8 is directly supported by the car-side buffer base 18. In example 2 of the pit unit 7, the counterweight buffer 9 is directly supported by the counterweight-side buffer base 19. In example 2 of the pit unit 7, the structure of the load supporting apparatus 33 is the same as that of example 1.

Fig. 14 is a front view showing a pit unit of example 3 in embodiment 1. Fig. 15 is a view from direction a-a of fig. 14. Fig. 16 is a view from B-B of fig. 14. Fig. 17 is a view in the direction of C-C of fig. 14.

Hereinafter, the structure of pit unit 7 according to example 3 will be described, focusing on differences from example 1 shown in fig. 7 to 10, with reference to fig. 14 to 17.

In example 3 of the pit unit 7, the structures of the car-side buffer base 18 and the heavy-side buffer base 19 are different from those in example 1. The pit unit 7 of example 3 does not include the car-side 1 st guide 27 and the heavy-side 1 st guide 28.

The load support devices 33 in example 3 of the pit unit 7 are provided at both ends of the car-side buffer base 18 and the heavy-side buffer base 19. A pair of load support devices 33 provided on the car-side buffer table 18 are guided by the car guide rail 31. A pair of load support devices 33 provided on the counterweight-side buffer base 19 are guided by the counterweight guide rail 32.

The load support device 33 in example 3 of the pit unit 7 has a function of being fixable to the car guide rail 31 and the reuse guide rail 32. This function is implemented e.g. by the same mechanism as the emergency stop device of the elevator. The pit unit 7 is fixed in the hoistway by driving the load support device 33. When the pit unit 7 is lifted, the fixing by the load supporting means 33 is released. The car-side buffer base 18 and the heavy-side buffer base 19 may be provided with a hanger such as an eye bolt, for example, which is connected to the suspension rope 11 or the connecting rope 12 when the pit unit 7 is lifted.

Fig. 18 is a front view showing a 4 th example of the pit unit in embodiment 1. Fig. 19 is a view from direction a-a of fig. 18. Fig. 20 is a view in the direction of C-C of fig. 18.

Hereinafter, the structure of pit unit 7 according to example 4 will be described, focusing on differences from example 3 shown in fig. 14 to 17, with reference to fig. 18 to 20.

In example 4 of the pit unit 7, the compensating sheave 15 is not mounted. The 4 th example of the pit unit 7 does not include the car-side buffer support base 20, the counterweight-side buffer support base 21, the car-side buffer support beam 22, the counterweight-side buffer support beam 23, the buffer base connection beam 24, the compensating sheave rail support beam 25, the compensating sheave rail 26, the car-side 1 st guide 27, the counterweight-side 1 st guide 28, the car-side 2 nd guide 29, and the counterweight-side 2 nd guide 30.

In example 4 of the pit unit 7, the car bumper 8 is directly supported by the car-side bumper base 18. In example 4 of the pit unit 7, the counterweight buffer 9 is directly supported by the counterweight-side buffer base 19. In example 4 of the pit unit 7, the structures of the car-side buffer base 18 and the heavy-side buffer base 19 are the same as those in example 3. In example 4 of the pit unit 7, the function of the load supporting means 33 is the same as in example 3.

The structure of the pit unit 7 in embodiment 1 is not limited to the structure shown in fig. 7 to 20. The pit unit 7 may be equipped with at least one of a car buffer 8 and a counterweight buffer 9, for example.

Fig. 21 is a flowchart for explaining a procedure of a method of applying the lift extension technique of an elevator in embodiment 1. An example of a procedure of a method of applying the head extension technique will be described below with reference to fig. 21.

In step S101, the worker performs the 1 st elevation stroke extension process. The 1 st elevation stroke extension process may be repeated a plurality of times. Then, the worker performs the process of step S102. In step S102, the worker performs the lift stroke moving step. The lifting stroke moving process may be repeated a plurality of times. Then, the worker performs the process of step S103. In step S103, the operator performs the 2 nd hoisting stroke extension step by performing the main installation hoisting machine installation step, and the step of lowering the pit unit 7 fixed to the hoistway intermediate portion to the hoistway lowermost portion or the step of installing the main installation pit equipment. As a result, the lift extension technique of the elevator can be applied regardless of the height of the building.

According to embodiment 1 described above, the method of applying the lift extension technique of the elevator includes the 1 st lift stroke extension step, the lift stroke moving step, and the 2 nd lift stroke extension step. The 1 st lifting stroke extending process is as follows: the relative position of the machine room unit 3 with respect to the pit unit 7 is raised, and the pit unit 7 is equipped with at least one of the car buffer 8 and the counterweight buffer 9 and can be raised and lowered in the hoistway below the machine room unit 3. The lift stroke moving step is a step of moving the machine room unit 3 and the pit unit 7 in the same direction. Therefore, the lift extension technique of the elevator using the temporary installation hoisting machine 4 which is smaller and lighter than the main installation hoisting machine 14 can be applied to a high-rise building. The 2 nd lift stroke extension process is as follows: the main installation hoisting machine 14 is installed, and the pit unit 7 which can be raised and lowered in the hoistway carrying at least one of the car buffer 8 and the counterweight buffer 9 is lowered or a new installation pit equipment is installed. As a result, the restriction of the maximum height at which the elevator can provide service can be eliminated.

In the lift stroke moving step, for example, the machine room unit 3 is pulled up in a state where the pit unit 7 and the machine room unit 3 are coupled. In this case, since the lifting operation is completed at one time, the operation time can be shortened.

In the up-down stroke moving step, for example, the machine room unit 3 may be pulled up in a state where the compensating ropes 17 are detached from the compensating sheave 15, and then the pit unit 7 may be pulled up. In this case, the load during the lifting operation can be reduced. In this case, the machine room unit 3 or the pit unit 7 can be raised to the target height by one lifting operation.

In the up-down stroke moving step, for example, the machine room unit 3 may be pulled up after the pit unit 7 is pulled up in a state where the compensating rope 17 is wound around the compensating sheave 15 and the car 1 and the counterweight 2 are disposed at positions where a space can be formed between the lower portion of the car 1 and the car buffer 8 and between the lower portion of the counterweight 2 and the counterweight buffer 9. In this case, the load during the lifting operation can be reduced. In this case, the compensating ropes 17 do not need to be attached to and detached from the compensating sheave 15.

In the up-down stroke moving step, for example, the machine room unit 3 or the pit unit 7 may be raised in a state where the car 1 is placed on the car buffer 8. In the up-down stroke moving step, for example, the machine room unit 3 or the pit unit 7 may be raised in a state where the counterweight 2 is placed on the counterweight buffer 9. In the lift stroke moving step, for example, the machine room unit 3 or the pit unit 7 may be raised in a state where the car 1 is placed on the car buffer 8 and the counterweight 2 is placed on the counterweight buffer 9. That is, in the elevation stroke movement step, the machine room unit 3 or the pit unit 7 may be raised in a state where the weight of at least one of the car 1 and the counterweight 2 is supported by the pit unit 7. In this case, the load during the lifting operation can be reduced.

In the 1 st elevation stroke extension step, for example, the elevation stroke is extended to a maximum elevation stroke to which the temporary installation hoisting machine 4 can be applied. In this case, the limitation of the maximum height at which the service can be provided can be eliminated while maintaining the movable range of the elevator to the maximum.

Further, for example, the pit unit 7 may be previously assembled outside the hoistway. In this case, the following steps can be performed: before the elevation stroke moving step is performed, the pit unit 7 assembled in advance is integrally carried into the hoistway from the hoistway opening portion. In this case, the following steps can be performed: after the lift stroke moving step is performed, the pit unit 7 used for temporary installation is taken out from the hoistway opening portion and carried out to the outside of the building. As a result, the time required for mounting and removing the pit unit 7 can be reduced.

Industrial applicability

The invention can be used for the lift extension type elevator in a high-rise building.

Description of the reference symbols

1: a car;

2: a counterweight;

3: a machine room unit;

4: temporarily setting a traction machine;

5: a rope;

6: a control panel;

7: a pit unit;

8: a car buffer;

9: a counterweight buffer;

10: a lifting device;

11: a sling;

12: a connecting rope;

13: a machine room;

14: formally setting a tractor;

15: a compensating sheave;

16: a housing;

17: a compensating rope;

18: a car side buffer stage;

19: a counterweight buffer stage;

20: a car-side buffer support table;

21: a counterweight-side buffer support table;

22: a car-side buffer support beam;

23: a counterweight-side buffer support beam;

24: a bumper stage tie beam;

25: a track support beam for the compensating sheave;

26: compensating the track for the rope sheave;

27: a car-side 1 st guide portion;

28: a counterweight-side 1 st guide part;

29: a cage-side 2 nd guide portion;

30: a counterweight-side 2 nd guide part;

31: a guide rail for a car;

32: a guide rail for counterweight;

33: a load bearing device;

33 a: a cylindrical member;

33 b: a sliding member;

34: a landing floor.

Claims (20)

1. An application method of lift extension technology of an elevator, comprising:

a lift stroke moving step of moving a lift stroke in accordance with progress of construction work by raising a pit unit, which is mounted with at least one of a car buffer and a counterweight buffer and has a structure guided by at least one of a car guide rail and a heavy guide rail, in a lift-extended elevator applied to a hoistway of an elevator in which a hoisting machine for installation is installed after completion of a construction period, in a direction in which the pit unit is raised from a lowermost part of the hoistway to a machine room unit in which the hoisting machine is mounted, and fixing the pit unit to an intermediate part of the hoistway; and

and a step of, after the elevation stroke moving step is performed, lowering the pit unit fixed to the hoistway intermediate portion to the lowermost portion of the hoistway while being guided by at least one of the car guide rail and the counterweight guide rail, and setting the pit unit as pit equipment for main installation.

2. The method for applying the lift extension technology of an elevator according to claim 1,

the pit unit can be fixed to at least one of the car guide rail, the counterweight guide rail, and the building structure.

3. The method for applying the lift extension technology of an elevator according to claim 1,

in the up-down stroke moving step, the pit unit is raised after the machine room unit is raised.

4. The method for applying the lift extension technology of an elevator according to claim 2,

in the up-down stroke moving step, the pit unit is raised after the machine room unit is raised.

5. The method for applying the lift extension technology of an elevator according to claim 1,

in the up-down stroke moving step, the pit unit is raised before the machine room unit is raised in a state where the car and the counterweight are disposed at positions where spaces can be formed between a lower portion of the car and the car buffer and between a lower portion of the counterweight and the counterweight buffer.

6. The method for applying the lift extension technology of an elevator according to claim 2,

in the up-down stroke moving step, the pit unit is raised before the machine room unit is raised in a state where the car and the counterweight are disposed at positions where spaces can be formed between a lower portion of the car and the car buffer and between a lower portion of the counterweight and the counterweight buffer.

7. The method for applying the lift extension technology of an elevator according to claim 1,

in the up-down stroke moving step, the machine room unit and the pit unit are simultaneously raised in a state where they are coupled to each other.

8. The method for applying the lift extension technology of an elevator according to claim 2,

in the up-down stroke moving step, the machine room unit and the pit unit are simultaneously raised in a state where they are coupled to each other.

9. The method for applying the lift extension technology of an elevator according to claim 1,

in the up-down stroke moving step, the machine room unit or the pit unit is raised in a state where the weight of at least one of the car and the counterweight is supported by the pit unit.

10. The method for applying the lift extension technology of an elevator according to claim 2,

in the up-down stroke moving step, the machine room unit or the pit unit is raised in a state where the weight of at least one of the car and the counterweight is supported by the pit unit.

11. The method of applying the lift extension technology of an elevator according to any one of claims 1 to 10,

the machine room unit is mounted with a temporary installation hoist.

12. The method of applying the lift extension technology of an elevator according to any one of claims 1 to 10,

the method also comprises the following steps: before the lift stroke moving step is performed, the pit unit previously assembled outside the hoistway is integrally carried into the hoistway from a hoistway opening.

13. The method for applying the lift extension technology of an elevator according to claim 11, wherein,

the method also comprises the following steps: before the lift stroke moving step is performed, the pit unit previously assembled outside the hoistway is integrally carried into the hoistway from a hoistway opening.

14. An application method of lift extension technology of an elevator, comprising:

a lift stroke moving step of moving a lift stroke according to progress of building construction by raising a pit unit, which is mounted with at least one of a car buffer and a counterweight buffer and on which a compensating sheave for winding a compensating rope connecting a lower part of the car and a lower part of the counterweight, in a lift-extended elevator applied to a hoistway of an elevator in which a hoisting machine for installation is installed after completion of a construction period, in a direction in which a machine room unit on which the hoisting machine is mounted is raised; and

a step of taking out the pit unit used for temporary installation from a hoistway opening portion after the elevation stroke moving step is performed, and installing pit equipment for main installation different from the pit unit in a lowermost portion of a hoistway,

in the up-down stroke moving step, the pit unit is raised before the machine room unit is raised in a state where the car and the counterweight are disposed at positions where spaces can be formed between the car lower portion and the car buffer and between the counterweight lower portion and the counterweight buffer, and the compensating rope is looped around the compensating sheave.

15. The method for applying the lift extension technology of an elevator according to claim 14,

the pit unit has a structure that is guided by at least one of a car guide rail and a reuse guide rail.

16. The method for applying the lift extension technology of an elevator according to claim 14,

the pit unit is fixable to at least one of a car guide rail, a counterweight guide rail, and a building structure.

17. The method for applying the lift extension technology of an elevator according to claim 15,

the pit unit is fixable to at least one of a car guide rail, a counterweight guide rail, and a building structure.

18. The method of applying the lift extension technique of an elevator according to any one of claims 14 to 17,

the machine room unit is mounted with a temporary installation hoist.

19. The method of applying the lift extension technique of an elevator according to any one of claims 14 to 17,

the method also comprises the following steps: before the lift stroke moving step is performed, the pit unit previously assembled outside the hoistway is integrally carried into the hoistway from a hoistway opening.

20. The method of applying the lift extension technology of an elevator according to claim 18,

the method also comprises the following steps: before the lift stroke moving step is performed, the pit unit previously assembled outside the hoistway is integrally carried into the hoistway from a hoistway opening.

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