JP7485218B2 - Cage moving method and elevator device - Google Patents

Description

The present disclosure relates to a method for moving a car and a raising device used to move the car.

Patent Document 1 describes a method for lifting an elevator's counterweight. By lifting the counterweight using the method described in Patent Document 1, the car can be moved downward even if it makes an emergency stop near the top floor.

International Publication No. 2020/065774

In the method described in Patent Document 1, a pair of lifting devices are attached to a guide rail that guides a counterweight. A worker must simultaneously operate the lifting devices installed on both sides of the counterweight, which creates a problem of poor workability.

The present disclosure has been made to solve the problems described above. An object of the present disclosure is to provide a method for moving a car with excellent operability. Another object of the present disclosure is to provide a height-raising device used in the method.

The method of moving a car according to the present disclosure is a method for moving a car downward in an elevator system that includes a car and a counterweight that move in a hoistway, a support device having a screw hole, a buffer that is attached to the support device using the screw hole and positioned directly below the counterweight, a rope that suspends the car and the counterweight, and a hoist around which the rope is wound. The method includes a first removal step of removing the shock absorber; a first movement step of, after the first removal step, placing a jack at the location where the shock absorber was located and using the jack to push up the counterweight and move the counterweight upward; a first raising step of, after the first movement step, attaching a first raising platform to the counterweight so as to extend downward from the counterweight; a second movement step of, after the first raising step, placing a jack under the first raising platform and using the jack to push up the first raising platform and move the counterweight upward ; a third raising step of, after the first removal step, placing a third raising platform at the location where the shock absorber was located; and a fourth movement step of, after the third raising step, placing a jack on the third raising platform and using the jack to move the counterweight upward . In a first removal step, the shock absorber is removed from the support device. In a third raising step, a support plate is attached to the support device using the screw holes, and a third raising stand is attached to the support plate.

The method of moving a car according to the present disclosure is a method for moving a car downward in an elevator system that includes a car and a counterweight that move in a hoistway, a support device having a screw hole, a buffer that is attached to the support device using the screw hole and positioned directly below the counterweight, a rope that suspends the car and the counterweight, and a hoist around which the rope is wound. The method includes a first removal step of removing the shock absorber, a first raising step of attaching a first raising platform to the counterweight so as to extend downward from the counterweight, a second moving step of pushing up the first raising platform by a jack arranged at the location where the shock absorber was arranged after the first raising step and moving the counterweight upward, a third raising step of arranging a third raising platform at the location where the shock absorber was arranged after the first removal step, and a fourth moving step of arranging a jack on the third raising platform and moving the counterweight upward by the jack after the third raising step . In the first removal step, the shock absorber is removed from the support device. In the third raising step, a support plate is attached to the support device using a screw hole, and the third raising platform is attached to the support plate.

The raising device of the present disclosure is a device used when moving the counterweight upward using a jack to move the car downward in an elevator system comprising: a car and a counterweight that move in a hoistway; a support device having a first screw hole; a shock absorber that is attached to the support device using the first screw hole and positioned directly below the counterweight; a rope that suspends the car and the counterweight; and a hoist around which the rope is wound, the counterweight having a second screw hole; a frame that supports an adjustment weight; and a spacer that is attached to the frame using the second screw hole and faces the shock absorber. The device comprises a first raising platform that can be attached to a frame body from which the spacer has been removed using a second screw hole, a support plate having a third screw hole and that can be attached to a support device from which the shock absorber has been removed using the first screw hole, a second raising platform that can be attached to the support plate using the third screw hole, and a third raising platform that can be attached to the first raising platform attached to the frame body and to the second raising platform attached to the support plate.

The method of moving a car according to the present disclosure is a method for moving a car downward in an elevator system that includes a car and a counterweight that move in a hoistway, a shock absorber disposed directly below the counterweight, a rope that suspends the car and the counterweight, and a hoist around which the rope is wound. The method includes a first removal step of removing the shock absorber, a first movement step of placing a first jack below the counterweight and using the first jack to push up the counterweight and move it upward, a first raising step of placing a first raising platform below the counterweight after the first movement step, and a second raising step of placing a second jack on the first raising platform after the first raising step and using the second jack to push up the counterweight and move it upward. The method includes a second moving step of moving the counterweight upward, a second raising step of removing the first jack from under the counterweight after the second moving step and positioning a second raising platform below the counterweight so that its upper surface is positioned higher than the upper surface of the first raising platform, and a third moving step of positioning the first jack on the second raising platform after the second raising step and using the first jack to push up the counterweight and move it upward.

The method of moving a car according to the present disclosure is a method for moving a car downward in an elevator system that includes a car and a counterweight that move in a hoistway, a shock absorber disposed directly below the counterweight, a rope that suspends the car and the counterweight, and a hoist around which the rope is wound. The method includes a first removal step of removing the shock absorber, a first movement step of disposing a first jack below the counterweight and using the first jack to push up the counterweight and move it upward, a first heightening step of attaching a first heightening platform so as to extend downward from the counterweight while the counterweight is supported by the first jack after the first movement step, and a second heightening step of attaching a first heightening platform so as to extend downward from the counterweight after the first heightening step. The method includes a second moving step of pushing up the first raising platform with a second jack arranged below the soffit and moving the counterweight upward, a second raising step of attaching the second raising platform below the first raising platform with the counterweight supported by the second jack after the second moving step, and a third moving step of pushing up the second raising platform with the first jack and moving the counterweight upward after the second raising step.

According to the present disclosure, the cage can be easily moved downward.

FIG. 1 illustrates an example of an elevator device. FIG. 2 is a diagram showing an example of a hoistway pit. 1 is a flow chart illustrating a method for moving a car downward. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. 13A and 13B are diagrams for explaining another method of fixing the lifting platform. 1 is a flow chart illustrating a method for moving a car downward. 1 is a flow chart illustrating a method for moving a car downward. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. FIG. 13 is a diagram for explaining a method of moving a car. 19 is a cross-sectional view taken along the line DD in FIG. 18. 20 is a cross-sectional view corresponding to the EE cross section of the pit shown in FIG. 19. 21 is a cross-sectional view corresponding to the EE cross section of the pit shown in FIG. 20. 1A and 1B are diagrams illustrating examples of a support stand and a jack. FIG. 13 is a diagram showing an example of a support plate. FIG. 13 is a diagram showing an example of a raising platform.

A detailed explanation is provided below with reference to the drawings. Duplicate explanations will be simplified or omitted as appropriate. In each drawing, the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
1 is a diagram showing an example of an elevator apparatus. The elevator apparatus includes a car 1 and a counterweight 2. The car 1 moves up and down in a hoistway 3. The counterweight 2 moves up and down in the hoistway 3. The car 1 and the counterweight 2 are suspended in the hoistway 3 by a rope 4.

The rope 4 is wound around a hoisting machine 5. Specifically, the rope 4 is wound around a sheave 6 of the hoisting machine 5. The hoisting machine 5 drives the car 1. The control device 7 controls the hoisting machine 5. That is, the movement of the car 1 is controlled by the control device 7. The hoisting machine 5 and the control device 7 are provided at the top of the elevator shaft 3.

Figure 1 shows an elevator device with a 2:1 roping system as an example. In the example shown in Figure 1, one end 4a of the rope 4 is provided at the top of the hoistway 3. The other end 4b of the rope 4 is provided at the top of the hoistway 3. The car 1 includes a hoist 8 and a hoist 9. The counterweight 2 includes a hoist 10. The rope 4 extends downward from the end 4a and is wound around the hoist 8, the hoist 9, the sheave 6, and the hoist 10 in that order.

Buffers 11 and 12 are provided in the pit 3a of the elevator shaft 3. Buffer 11 is disposed directly below the car 1. Buffer 12 is disposed directly below the counterweight 2.

The communication device 13 is connected to the control device 7. The communication device 13 is a device that enables the elevator device to communicate with the outside. The communication device 13 communicates with the outside via the network 14. The outside includes a remote monitoring center that monitors the elevator device.

Normally, when a malfunction occurs in such an elevator system, workers move from the hall 15 to above the car 1 and perform recovery work on top of the car 1. However, when a malfunction or power outage occurs in the elevator system, it may not be possible to electrically move the car 1. In such a case, if the car 1 is stopped near the hall 15 on the top floor, for example, the workers cannot move above the car 1.

Even if the car 1 cannot be moved electrically, if the brake device (not shown) provided on the hoist 5 can be manually released, the car 1 may be able to move. However, if the hoist 5 is installed at the top of the hoistway 3, the worker cannot operate the brake device unless he moves above the car 1. Even if the brake device can be released, if the car 1 is lighter than the counterweight 2, the worker must place a heavy object on the car 1 stopped near the top floor to make the car 1 heavier than the counterweight 2.

Then, the worker moves the counterweight 2 upward in the pit 3a of the elevator 3, thereby moving the car 1 downward to a position where the worker can move from the landing 15 onto the car 1. The method is described in detail below.

Figure 2 is a diagram showing an example of a pit 3a of a hoistway 3. In addition to the hoist 10, the counterweight 2 includes an adjustment weight 21, a frame 22, a guide roller 23, and a spacer 24.

The adjustment weight 21 is a weight for adjusting the overall weight of the counterweight 2. The adjustment weight 21 is supported by a frame body 22. The hoist 10 is rotatably mounted on the frame body 22. A guide roller 23 is also provided on the frame body 22. The guide roller 23 rotates while in contact with the guide rail 16, so that the movement of the counterweight 2 is guided by the guide rail 16. The counterweight 2 may be provided with a guide shoe instead of the guide roller 23.

The guide rails 16 extend vertically from the pit 3a. The lower ends of the guide rails 16 are supported by support devices 17. The support devices 17 are provided on the floor of the pit 3a. The support devices 17 are disposed below the counterweights 2 so as to connect the lower ends of the guide rails 16 on one side and the lower ends of the guide rails 16 on the other side.

The shock absorber 12 is a device for cushioning the impact when the counterweight 2 falls. For this reason, the shock absorber 12 is disposed directly below the counterweight 2. The shock absorber 12 is provided on the support device 17 so as to protrude upward from the support device 17. In the example shown in FIG. 2, the support device 17 has a screw hole (not shown). The screw hole is formed on the upward surface of the support device 17. The shock absorber 12 is provided on the support device 17 using the screw hole. The bolt 18 passes through the base portion of the shock absorber 12 and is screwed into the screw hole. Hereinafter, the screw hole formed in the support device 17 will also be referred to as screw hole A.

The spacer 24 is a member that collides with the shock absorber 12 from above when the counterweight 2 falls. For this reason, the spacer 24 is disposed so as to face the shock absorber 12. The spacer 24 is provided on the frame body 22 so as to protrude downward from the frame body 22. In the example shown in FIG. 2, the frame body 22 has a screw hole (not shown). The screw hole is formed on the downward surface of the frame body 22. The spacer 24 is provided on the frame body 22 using the screw hole. The bolt 25 passes through the upper flange portion of the spacer 24 and is screwed into the screw hole. Hereinafter, the screw hole formed in the frame body 22 will also be referred to as the screw hole B.

Figure 3 is a flow chart showing a method for moving car 1 downward. Figures 4 to 14 are diagrams for explaining the method for moving car 1. Figures 4 to 14 show the pit 3a of the elevator shaft 3. For example, if a power outage occurs and car 1 stops near the top floor landing 15, the counterweight 2 is positioned immediately above the buffer 12 as shown in Figure 2.

First, the worker enters the pit 3a of the elevator shaft 3 from the landing 15 on the lowest floor (S101). In the pit 3a, the worker removes the shock absorber 12 from under the counterweight 2 (S102). Specifically, in S102, the worker loosens the bolts 18 to remove the shock absorber 12 from the support device 17.

In addition, the worker removes the spacer 24 from the counterweight 2 in the pit 3a (S103). Specifically, in S103, the worker loosens the bolts 25 to remove the spacer 24 from the frame body 22. The removal process shown in S103 may be performed before the removal process shown in S102. Figure 4 shows the state in which the shock absorber 12 has been removed from the support device 17 and the spacer 24 has been removed from the frame body 22.

Next, the worker places the jack 30 under the counterweight 2 (S104). Specifically, the worker places the jack 30 in the location where the shock absorber 12 removed in S102 was placed. Note that "placing the jack 30 in the location where the shock absorber 12 was placed" includes the case where only a part of the jack 30 is placed in the location where the shock absorber 12 was placed. Figure 5 shows the state where the jack 30 is placed under the counterweight 2 in S104. The jack 30 is, for example, a hydraulic jack. Figure 5 shows the state where the upper end of the jack 30 is abutted against the frame body 22 from below.

Next, the worker pushes up the counterweight 2 with the jack 30, moving the counterweight 2 upward (S105). After moving the counterweight 2 upward, the worker removes the jack 30 from under the counterweight 2 (S106).

When counterweight 2 moves upward in S105, rope 4 slackens. Because rotation of sheave 6 is prevented by a brake device provided on hoist 5, sheave 6 does not rotate even if rope 4 slackens. However, the weight of car 1 acts on rope 4. For this reason, when counterweight 2 moves upward in S105, rope 4 slides on sheave 6, causing car 1 to move downward. Note that if tension is applied to rope 4 as a result of car 1 moving downward, car 1 and counterweight 2 will not move even if jack 30 is removed from under counterweight 2.

The worker removes the jack 30 from under the counterweight 2 and attaches the raising platform 31 to the counterweight 2 (S107). Figure 6 shows the state in which the raising platform 31 has been attached to the counterweight 2 in the raising process of S107. The raising platform 31 is attached to the counterweight 2 so as to extend downward from the counterweight 2.

The raising platform 31 may be attached to the frame body 22 using a screw hole B formed in the frame body 22. FIG. 6 shows the raising platform 31 attached to the downward surface of the frame body 22 by a bolt 25. The bolt 25 passes through the upper flange portion of the raising platform 31 and is screwed into the screw hole B. In the example shown in FIG. 6, the raising platform 31 is placed at the location where the spacer 24 removed in S103 was placed. Note that "placed at the location where the spacer 24 was placed" includes the case where only a part of the raising platform 31 is placed at the location where the spacer 24 was placed.

Next, the worker places the jack 30 under the raising platform 31 installed in S107 (S108). Specifically, the worker places the jack 30 in the location where the shock absorber 12 was located. Figure 7 shows the state in which the jack 30 is placed under the raising platform 31 in S108.

Next, the worker uses the jack 30 to push up the raising platform 31, and moves the counterweight 2 upward (S109). Figure 8 shows the state in which the raising platform 31 has been pushed up by the jack 30. As described above, by moving the counterweight 2 upward by the jack 30, the car 1 moves downward.

After moving car 1 downward, the worker determines whether car 1 needs to be moved further (S110). If car 1 is positioned at a height that allows the worker to move from the top floor platform 15 onto car 1, S110 returns No. If the worker cannot get onto car 1 without moving car 1 further downward, S110 returns Yes. If S110 returns Yes, the series of operations shown in S106 to S109 are repeated.

For example, if the worker judges Yes in S110 after pushing up the raising platform 31 with the jack 30, the worker removes the jack 30 from under the raising platform 31 (S106). Next, in the raising process of S107, the worker further attaches the raising platform 32 to the raising platform 31 attached to the counterweight 2. Figure 9 shows the state in which the raising platform 32 is attached to the raising platform 31 in S107. The raising platform 32 is attached to the raising platform 31 so as to extend downward from the raising platform 31.

As an example, mounting holes are formed in the lower flange portion of the raising platform 31. Mounting holes are formed in the upper flange portion of the raising platform 32. The raising platform 32 is fixed to the raising platform 31 by bolts that pass through these mounting holes and nuts that are fitted onto the bolts.

Next, the worker places the jack 30 under the raising platform 32 installed in S107 (S108). Specifically, the worker places the jack 30 in the location where the shock absorber 12 was located. Figure 10 shows the state in which the jack 30 is placed under the raising platform 32 in S108.

Next, the worker uses the jack 30 to push up the raising platform 32, moving the counterweight 2 upward (S109). This causes the car 1 to move downward.

Figure 11 shows a state in which a further Yes determination is made in S110 and lift-up platform 33 is attached under lift-up platform 32. Figure 11 also shows a state in which lift-up platform 33 is pushed up by jack 30 in S109. When performing the lift-up process in S107 after a Yes determination is made in S110, the worker need only attach an additional lift-up platform to the lowest lift-up platform among the lift-up platforms attached to counterweight 2.

As another example, in the raising step of S107, the raising platform may be installed on the support device 17. For example, if the determination in S110 is Yes after the raising platform 33 is installed in S107, the worker removes the jack 30 from under the raising platform 33 (S106). Next, in the raising step of S107, the worker places the raising platform 34 on the support device 17. FIG. 12 shows a state in which the raising platform 34 is placed in the location where the shock absorber 12 was placed in S107. Note that "the raising platform 34 is placed in the location where the shock absorber 12 was placed" includes the case where only a part of the raising platform 34 is placed in the location where the shock absorber 12 was placed.

Next, the worker places the jack 30 on the raising platform 34 placed on the support device 17 in S107 (S108). The worker then uses the jack 30 placed on the raising platform 34 to push up the raising platform 33, and moves the counterweight 2 upward (S109). Figure 13 shows the state in which the raising platform 33 has been pushed up by the jack 30 placed on the raising platform 34. This causes the car 1 to move downward.

If S110 is further judged as Yes after the raising platform 34 is installed in S107, the worker may further place the raising platform 35 on the raising platform 34 in the raising process of S107. For example, if S110 is judged as Yes in the state shown in FIG. 13, the worker removes the jack 30 from the raising platform 34 (S106). Next, the worker attaches the raising platform 35 on the raising platform 34 in the raising process of S107. FIG. 14 shows the state in which the raising platform 35 is attached to the raising platform 34 in S107. The raising platform 35 is attached to the raising platform 34 so as to extend upward from the raising platform 34.

As an example, mounting holes are formed in the upper flange portion of the raising platform 34. Mounting holes are formed in the lower flange portion of the raising platform 35. The raising platform 35 is fixed to the raising platform 34 by bolts that pass through these mounting holes and nuts that are fitted onto the bolts.

Next, the worker places the jack 30 on the raising platform 35 installed in S107 (S108). Then, the worker uses the jack 30 placed on the raising platform 35 to push up the raising platform 33, moving the counterweight 2 upward (S109). This causes the car 1 to move downward.

In addition, if the number of raising platforms stacked on the support device 17 increases, it becomes difficult to operate the jack 30. If the height of each raising platform is about 50 cm, it is preferable to limit the number of raising platforms stacked on the support device 17 to two.

If the answer is No in S110, the worker moves to the top floor landing 15. The worker then opens the door at the top floor landing 15 and moves from the landing 15 onto car 1 (S111). From on top of car 1, the worker can carry out the work required for recovery.

In the method shown in this embodiment, the worker can move the car 1 upward using the jack 30. Therefore, this method is excellent in workability. The worker can move the car 1 downward in a short time with little effort.

Figure 1 shows an example in which the hoisting machine 5 and the control device 7 are installed at the top of the hoistway 3. The location at which the hoisting machine 5 and the control device 7 are installed is not limited to the top of the hoistway 3.

In this embodiment, a method of moving the car 1 using one jack 30 has been described. The worker may use multiple jacks to move the car 1. For example, a short jack may be used in S104 and a long jack may be used in S108 to fit the space formed under the counterweight 2.

In this embodiment, an example has been described in which the raising platform 34 is simply placed on the support device 17. This is one example. The raising platform 34 may be fixed to the support device 17 using bolts or the like. For example, a mounting hole is formed in the lower flange portion of the raising platform 34 in accordance with the position of the screw hole A. The bolt 18 passes through the lower flange portion of the raising platform 34 and is screwed into the screw hole A.

Figure 15 is a diagram illustrating another method of fixing the raising platform 34. In the example shown in Figure 15, the raising platform 34 is fixed to the support device 17 via a support plate 36. In the raising process of S107, an operator attaches the support plate 36 to the support device 17 using screw hole A. For example, an attachment hole is formed in the support plate 36 to match the position of screw hole A. A bolt 18 passes through the support plate 36 and is screwed into screw hole A.

In addition, a screw hole (not shown) is formed in the support plate 36. Hereinafter, the screw hole formed in the support plate 36 will also be referred to as screw hole C. The raiser base 34 is attached to the support plate 36 using the screw hole C. For example, an attachment hole is formed in the lower flange portion of the raiser base 34 to match the position of the screw hole C. The bolt 37 passes through the lower flange portion of the raiser base 34 and is screwed into the screw hole C.

In this embodiment, an example has been described in which the frame body 22 is pushed up by the jack 30 immediately after removing the shock absorber 12 and the spacer 24. This is one example. If space for placing the jack 30 can be secured under the lift-up platform 31 even if the lift-up platform 31 is attached to the frame body 22 immediately after removing the shock absorber 12 and the spacer 24, the operations shown in S104 to S106 immediately after S103 do not need to be performed.

In addition, if screw holes or mounting holes for attaching the raising platform 31 are formed in the spacer 24 and space for placing the jack 30 can be secured under the spacer 24 without removing the spacer 24, the operation shown in S103 does not need to be performed. In such a case, in the raising step of S107, the raising platform 31 is attached to the spacer 24 so as to extend downward from the counterweight 2.

In this embodiment, an example has been described in which the raising platforms 32 to 35 have the same shape. Therefore, for example, the raising platform 32 can also be attached to the raising platform 34. The raising platform 35 can also be attached to the raising platform 33. The raising platforms 32 to 35 do not have to have the same shape. The raising platforms 31 to 35 may have the same shape. Note that in the example shown in this embodiment, each of the raising platforms 32 to 35 can be used in the same way even if it is placed upside down.

Embodiment 2.
In this embodiment, an example will be described in which the car 1 is moved downward while constantly supporting the counterweight 2. Figures 16 and 17 are flowcharts showing a method for moving the car 1 downward. Figures 16 and 17 show an example of a series of operations performed by an operator.

Figures 18 to 34 are diagrams for explaining the method of moving car 1. Figures 18 to 34 show the pit 3a of the hoistway 3. In this embodiment, an example is described in which car 1 stops with the counterweight 2 supported by the buffer 12 as shown in Figure 18. In the example shown in this embodiment, too, the worker moves the counterweight 2 upward in the pit 3a of the hoistway 3, thereby moving car 1 downward to a position where it can move from the landing 15 onto car 1.

Figure 35 is a view showing a cross section taken along line D-D in Figure 18. In the example shown in this embodiment, the shock absorber 12 is fixed to a block-shaped base portion 19 of the support device 17 using bolts 18. Details of the structure in which the support device 17 supports the guide rail 16 are omitted in Figures 18 and 35.

A worker enters the pit 3a of the elevator shaft 3 from the landing 15 on the lowest floor (S201). In the pit 3a, the worker first installs the support platform 40 and the jack 41 (S202). Figure 19 shows the state after the jack 41 has been installed in S202. Figure 36 is a view equivalent to the E-E cross section (see Figure 35) of the pit 3a shown in Figure 19.

In S202, the worker first removes the four bolts 18 to ensure space for installing the support stand 40, etc. Next, the worker installs the support stand 40 as shown in Fig. 36. In the example shown in Fig. 36, the support stand 40 is positioned so that a portion of it rests on top of the shock absorber 12 placed on the base portion 19.

Next, the worker places the jack 41 on the support stand 40 as shown in Figure 36. The jack 41 is placed directly below the frame 22 of the counterweight 2. As an example, the jack 41 is a small hydraulic jack that can be placed below the counterweight 2 while the counterweight 2 is supported by the shock absorber 12. The jack 41 is placed adjacent to the shock absorber 12.

Next, the worker pushes up the counterweight 2 with the jack 41, moving the counterweight 2 upward (S203). In the movement process shown in S203, the counterweight 2 is supported by the shock absorber 12 until the tip of the jack 41 comes into contact with the frame body 22. When the tip of the jack 41 comes into contact with the frame body 22, the counterweight 2 separates from the shock absorber 12. As a result, the counterweight 2 is supported by the jack 41, and the load of the counterweight 2 no longer acts on the shock absorber 12.

Next, the worker sets up a support stand 42 and a jack 43 below the counterweight 2 (S204). During the step shown in S204, the counterweight 2 is supported by the jack 41. Figure 20 shows the state in which the jack 43 has been set up in S204. Figure 37 is a view equivalent to the E-E cross section of the pit 3a shown in Figure 20.

Figure 38 is a diagram showing an example of a support stand 42 and a jack 43. In S204, the worker first installs the support stand 42 as shown in Figure 37. The support stand 42 is positioned so as to straddle the base portion 19 and the shock absorber 12. That is, in the state shown in Figures 20 and 37, the support stand 42 is not in contact with the base portion 19 and the shock absorber 12.

Next, the worker places the jack 43 on the support base 42 as shown in FIG. 37. The jack 43 is positioned directly below the frame 22 of the counterweight 2. As an example, the jack 43 is a small hydraulic jack of the same type as the jack 41. The jack 43 is positioned adjacent to the shock absorber 12 so that the shock absorber 12 is positioned between the jack 41 and the jack 43.

Next, the worker pushes up the counterweight 2 with the jack 43, moving the counterweight 2 upward (S205). As shown in FIG. 37, the upper surface of the support base 42 is positioned higher than the upper surface of the support base 40. In the movement process shown in S205, the counterweight 2 is supported by the jack 41 until the tip of the jack 43 contacts the frame body 22. When the tip of the jack 43 contacts the frame body 22, the counterweight 2 separates from the jack 41. As a result, the counterweight 2 is supported by the jack 43, and the load of the counterweight 2 no longer acts on the jack 41.

Next, the worker removes the support base 40 and the jack 41 from under the counterweight 2. Furthermore, the worker removes the shock absorber 12 from under the counterweight 2 (S206). During the removal process shown in S206, the counterweight 2 is supported by the jack 43. Figure 21 shows the state after the shock absorber 12 has been removed in S206.

Next, the worker reinstalls the jack 41 removed in S206 at a higher position (S207). During the reinstallation process shown in S207, the counterweight 2 is supported by the jack 43. Figure 22 shows the state in which the jack 41 has been reinstalled in S207.

In S207, the worker first places the support base 44 directly below the frame body 22 of the counterweight 2. As an example, the support base 44 has the same shape as the support base 42. Next, the worker places the spacer 45 on the support base 44 and places the spacer 45 directly below the frame body 22 of the counterweight 2. The spacer 45 is a member for placing the jack 41 at a higher position than the jack 43.

Next, the worker places the jack 41 on the spacer 45. As a result, the jack 41 is positioned higher than the jack 43 by the height of the spacer 45. The jack 41 is also positioned directly below the frame 22 of the counterweight 2.

Next, the worker pushes up the counterweight 2 using the jack 41 placed on the spacer 45, moving the counterweight 2 upward (S208). In the movement process shown in S208, the counterweight 2 is supported by the jack 43 until the tip of the jack 41 comes into contact with the frame body 22. When the tip of the jack 41 comes into contact with the frame body 22, the counterweight 2 separates from the jack 43. As a result, the counterweight 2 is supported by the jack 41, and the load of the counterweight 2 no longer acts on the jack 43.

Next, the worker removes the support base 42 and the jack 43 from under the counterweight 2 (S209). During the removal process shown in S209, the counterweight 2 is supported by the jack 41. Figure 23 shows the state after the jack 43 has been removed in S209.

Next, the worker attaches the raising platform 50 to the counterweight 2 (S210). The worker also installs the support plate 46 and the jack 47 below the counterweight 2 (S211). During the steps shown in S210 and S211, the counterweight 2 is supported by the jack 41. Figure 24 shows the state after the jack 47 has been installed in S211.

In S210, the raising platform 50 is attached to the counterweight 2 so as to extend downward from the counterweight 2. Figure 24 shows an example in which the raising platform 50 is attached to the downward surface of the frame body 22. As described above, the counterweight is supported by the jack 41 while the raising platform 50 is attached to the counterweight 2. The jack 41 is pre-positioned so as not to interfere with the raising platform 50 during the operation in S210.

Figure 39 is a diagram showing an example of the support plate 46. The support plate 46 is a plate-shaped member. In S211, the worker first attaches the support plate 46 to the base portion 19. As an example, the support plate 46 is bolted to the base portion 19 using the four screw holes in which the bolts 18 were attached.

Next, the worker places jack 47 on support plate 46. As an example, jack 47 is a hydraulic jack that is longer than jacks 41 and 43. Jack 47 placed on support plate 46 is positioned directly below one end of a raising platform 50 attached to counterweight 2.

Next, the worker pushes up the counterweight 2 with the jack 47, and moves the counterweight 2 upward (S212). Specifically, the worker pushes up the counterweight 2 by hitting the tip of the jack 47 against the raising platform 50.

In the movement process shown in S212, the counterweight 2 is supported by the jack 41 until the tip of the jack 47 comes into contact with the raising platform 50. When the tip of the jack 47 comes into contact with the raising platform 50, the counterweight 2 moves away from the jack 41. As a result, the counterweight 2 is supported by the jack 47, and the load of the counterweight 2 no longer acts on the jack 41. Figure 25 shows the state in which the counterweight 2 has been pushed up by the jack 47.

Next, the worker removes the support base 44, the spacer 45, and the jack 41 from under the counterweight 2 (S213). During the removal process shown in S213, the counterweight 2 is supported by the jack 47.

Next, the worker sets up the raising platform 51 and the jack 48 below the counterweight 2 (S214). During the step shown in S214, the counterweight 2 is supported by the jack 47. Below, the raising platform located below the jack 48 is given the reference symbol 51. As will be described later, multiple raising platforms 51 are located below the jack 48. The "-N" following the reference symbol 51 indicates that it is the Nth raising platform 51 from the bottom. Figure 26 shows the state in which the raising platform 51-1 and the jack 48 have been installed in S214.

In S214, the worker first places the raising platform 51-1 on the support plate 46. As an example, the raising platform 51-1 is bolted to the support plate 46. Next, the worker places the jack 48 on the raising platform 51-1. As a result, the jack 48 is positioned higher than the jack 47 by the height of the raising platform 51-1. As an example, the jack 48 is a hydraulic jack that is longer than the jack 41 and the jack 43. It is preferable that the jack 48 is the same type of hydraulic jack as the jack 47. The jack 48 placed on the raising platform 51-1 is placed directly below the other end of the raising platform 50 attached to the counterweight 2.

Next, the worker pushes up the counterweight 2 with the jack 48, and moves the counterweight 2 upward (S215). Specifically, the worker pushes up the counterweight 2 by hitting the tip of the jack 48 against the raising platform 50.

In the movement process shown in S215, the counterweight 2 is supported by the jack 47 until the tip of the jack 48 comes into contact with the raising platform 50. When the tip of the jack 48 comes into contact with the raising platform 50, the raising platform 50 moves away from the jack 47. As a result, the counterweight 2 is supported by the jack 48, and the load of the counterweight 2 no longer acts on the jack 47.

Next, the worker removes the jack 47 from under the counterweight 2 (S216). After removing the jack 47 from under the counterweight 2, the worker installs the raising platform 52 under the counterweight 2 and then reinstalls the jack 47 (S217). During the steps shown in S216 and S217, the counterweight 2 is supported by the jack 48.

In the following, the raising platform placed under the jack 47 is given the reference symbol 52. As an example, the raising platform 52 has the same shape as the raising platform 51. As will be described later, multiple raising platforms 52 are placed under the jack 47. The "-N" following the reference symbol 52 indicates that it is the Nth raising platform 52 from the bottom. Figure 27 shows the state in which the raising platforms 52-1 to 52-2 and the jack 47 have been installed in S217.

In S217, the worker places the raising platform 52-1 on the support plate 46. As an example, the raising platform 52-1 is bolted to the support plate 46. Next, the worker places the raising platform 52-2 on the raising platform 52-1. As a result, the upper surface of the raising platform 52-2 is positioned higher than the upper surface of the raising platform 51-1 on which the jack 48 is placed. The worker places the jack 47 on the raising platform 52-2. The jack 47 placed on the raising platform 52-2 is positioned directly below one end of the raising platform 50 attached to the counterweight 2.

In this embodiment, a preferred example is shown in which the raising platform 51 and the raising platform 52 have the same shape, so in S217, two raising platforms 52 are placed below the counterweight 2. As another example, the worker may ensure the required height by placing one raising platform 52 below the counterweight 2 in S217.

Next, the worker pushes up the counterweight 2 using the jack 47, and moves the counterweight 2 upward (S218). Specifically, the worker pushes up the counterweight 2 by hitting the tip of the jack 47 against the raising platform 50.

In the movement process shown in S218, the counterweight 2 is supported by the jack 48 until the tip of the jack 47 comes into contact with the raising platform 50. When the tip of the jack 47 comes into contact with the raising platform 50, the raising platform 50 moves away from the jack 48. As a result, the counterweight 2 is supported by the jack 47, and the load of the counterweight 2 no longer acts on the jack 48.

Next, the worker determines whether or not it is necessary to further perform the lower raising process (S219). The lower raising process is a process of adding a raising platform under the jacks 47 and 48 in order to move the counterweight 2 upward. If the positions of the jacks 47 and 48 are too high, it becomes difficult to operate the jacks 47 and 48. If the worker determines that moving the jack 48 further upward after moving the counterweight 2 upward in S218 will make it difficult to operate the jack 48, he or she determines No in S219. If the worker determines that moving the jack 47 further upward after moving the counterweight 2 upward in S215 will make it difficult to operate the jack 47, he or she may determine No in S219.

On the other hand, if the worker judges that there will be no particular problem in operating the jack 48 even if the jack 48 is moved further upward after moving the counterweight 2 upward in S218, the worker judges Yes in S219. If the worker judges that there will be no particular problem in operating the jack 47 even if the jack 47 is moved further upward after moving the counterweight 2 upward in S215, the worker judges Yes in S219.

If S219 is judged as Yes, the worker removes the jack 48 from under the counterweight 2 (S220). After removing the jack 48 from the top of the raising platform 51-1, the worker adds a raising platform 51 on the raising platform 51-1 and reinstalls the jack 48 (S214). FIG. 28 shows a state in which the raising platforms 51-2 to 51-3 have been added on top of the raising platform 51-1, and the jack 48 has been installed on the raising platform 51-3. The top surface of the raising platform 51-3 is positioned higher than the top surface of the raising platform 52-2 on which the jack 47 is placed. Note that the worker may ensure the required height by placing one raising platform 51 under the counterweight 2 in this process.

Next, the worker pushes up the counterweight 2 using the jack 48, moving the counterweight 2 upward (S215). Figure 29 shows the state in which the counterweight 2 has been pushed up from the state shown in Figure 28. As an example, the worker judges No in S219 in the state shown in Figure 29.

If the answer to S219 is Yes immediately after the movement process shown in S215, the worker places the jack 47 at the same height as the jack 48 by adding a raising platform 52 under the jack 47 (S221). In the example shown in FIG. 29, the worker adds a raising platform 52-3 under the jack 47 in S221. During this time, the counterweight 2 is supported by the jack 48. Also, if the answer to S219 is Yes immediately after the movement process shown in S218, the worker places the jack 48 at the same height as the jack 47 by adding a raising platform 51 under the jack 48 (S221).

After jacks 47 and 48 are positioned at the same height in S221, the worker performs the upper raising process. The upper raising process is a process of adding a raising platform on top of jacks 47 and 48 to move counterweight 2 upward. First, the worker attaches raising platform 53 to raising platform 50 (S222). During the raising process shown in S222, counterweight 2 is supported by jack 48.

In S222, the raising platform 53 is attached to the counterweight 2 so as to extend downward from the counterweight 2. In the example shown in this embodiment, the raising platform 53 is attached to the counterweight 2 via the raising platform 50. In the following, the raising platform arranged to extend downward from the counterweight 2 is given the reference symbol 53. As will be described later, a plurality of raising platforms 53 are connected below the counterweight 2 via the raising platform 50. The "-N" following the reference symbol 53 indicates that this is the Nth raising platform 53 from the top. Figure 30 shows the state in which the raising platform 53-1 is attached to the downward surface of the raising platform 50.

Figure 40 is a diagram showing an example of the raising platform 53. The upper and lower flange portions of the raising platform 53 are formed with notches 53a to avoid interference with the ram of the jack 47 or the ram of the jack 48. For example, consider the case where the raising platform 53-1 is attached to the raising platform 50 with the counterweight 2 supported by the jack 48 as shown in Figure 30. In such a case, even if the raising platform 53-1 is attached to the raising platform 50, the raising platform 53-1 does not come into contact with the jack 48. The ram of the jack 48 is placed in the notch 53a of the raising platform 53-1. In the example shown in Figure 30, the notch 53a of the raising platform 53-1 faces in the F direction.

In the state shown in Figure 30, the tip of the jack 47 faces the downward surface of the raising platform 53-1. Once the raising platform 53-1 is attached to the raising platform 50, the worker uses the jack 47 to push up the raising platform 53-1, moving the counterweight 2 upward (S223). The counterweight 2 is supported by the jack 48 until the tip of the jack 47 comes into contact with the raising platform 53-1. When the tip of the jack 47 comes into contact with the raising platform 53-1, the raising platform 50 moves away from the jack 48. As a result, the counterweight 2 is supported by the jack 47, and the load of the counterweight 2 no longer acts on the jack 48. Figure 31 shows the state in which the raising platform 53-1 has been pushed up by the jack 47.

Next, the worker determines whether or not it is necessary to perform further steps to raise the height of the upper part (S224). If car 1 is positioned at a height that allows the worker to move onto car 1 from the top floor landing 15, the worker determines No in S224. If the worker cannot get onto car 1 without moving car 1 further downward, the worker determines Yes in S224.

When the worker judges Yes in S224 in the state of FIG. 31, the worker attaches the raising platform 53-2 under the raising platform 53-1 with the counterweight 2 supported by the jack 47 as shown in FIG. 32 (S222). Specifically, when the worker judges Yes in S224, the worker lowers the ram of the jack 48. Next, the worker attaches the raising platform 53-2 to the downward surface of the raising platform 53-1 so that the ram of the jack 47 is positioned in the notch 53a of the raising platform 53-2. That is, in the example shown in FIG. 32, the notch 53a of the raising platform 53-2 faces in the G direction. Then, the worker pushes up the raising platform 53-2 with the jack 48, moving the counterweight 2 upward (S223).

The worker repeats the upper raising process until S224 returns No. Figure 33 shows the state in which the raising platforms 53-1 to 53-6 are connected below the raising platform 50. In the example shown in Figure 33, the notch 53a of the raising platform 53-6 faces in the G direction. The counterweight 2 is supported by the jack 48.

Figure 34 shows a state in which a height-adjusting platform 53-7 is attached under the platform 53-6. The platforms 53-1 to 53-6 have the same shape. The platform 53-7 is shorter than the platform 53-1. For example, the worker judges No in S224 by pushing up the platform 53-7 with the jack 47.

If the answer is No in S224, the worker moves to the top floor landing 15. The worker then opens the door at the top floor landing 15 and moves from landing 15 to above car 1 (S225). From atop car 1, the worker can carry out the work required for recovery.

The method shown in this embodiment also allows workers to move cage 1 downward in a short time and with little effort.

In this embodiment, an example using small jacks 41 and 43 and large jacks 47 and 48 has been described. If the worker does not need to use the large jacks 47 and 48 with a long stroke, he or she may use only the small jacks 41 and 43 to move the car 1 downward. Also, if the worker does not need to use the small jacks 41 and 43 with a short stroke, he or she may use only the large jacks 47 and 48 to move the car 1 downward.

In this embodiment, an example has been described in which the upper raising process is performed after the lower raising process. If the worker can position car 1 at the desired height without performing the upper raising process, he or she may only perform the lower raising process and move car 1 downward. Also, if the worker can position car 1 at the desired height without performing the lower raising process, he or she may only perform the upper raising process and move car 1 downward.

The cage movement method disclosed herein can be used in elevator systems in which a cage and counterweight are suspended in a hoistway by ropes.

1 cage, 2 counterweight, 3 elevator shaft, 3a pit, 4 rope, 4a-4b end, 5 hoist, 6 sheave, 7 control device, 8-10 hoist, 11-12 buffer, 13 communication device, 14 network, 15 landing, 16 guide rail, 17 support device, 18 bolt, 19 base, 21 adjustment weight, 22 frame, 23 guide roller, 24 spacer, 25 bolt, 30 jack, 31-35 raising platform, 36 support plate, 37 bolt, 40 support platform, 41 jack, 42 support platform, 43 jack, 44 support platform, 45 spacer, 46 support plate, 47-48 Jack, 50-53 Raising stand, 53a Notch

Claims (12)

A car and a counterweight that move through a hoistway;
A support device having a screw hole;
a shock absorber that is attached to the support device using the screw hole and disposed directly below the counterweight;
A rope for suspending the cage and the counterweight; and
a winch around which the rope is wound; and
1. A method for moving a car downward in an elevator system comprising:
a first removal step of removing the shock absorber;
a first moving step of disposing a jack at a location where the shock absorber was disposed after the first removing step, and pushing up the counterweight with the jack to move the counterweight upward;
a first raising step of attaching a first raising platform to the counterweight so as to extend downward from the counterweight after the first moving step;
a second moving step of disposing a jack under the first raising platform after the first raising step, and pushing up the first raising platform with the jack to move the counterweight upward;
a third raising step of placing a third raising platform in a location where the shock absorber was placed after the first removing step;
a fourth moving step of disposing a jack on the third raising platform after the third raising step and moving the counterweight upward by the jack;
Equipped with
In the first removal step, the shock absorber is removed from the support device,
A method for moving a car , in which, in the third raising process, a support plate is attached to the support device using the screw holes, and the third raising platform is attached to the support plate . A car and a counterweight that move through a hoistway;
A support device having a screw hole;
a shock absorber that is attached to the support device using the screw hole and disposed directly below the counterweight;
A rope for suspending the cage and the counterweight; and
a winch around which the rope is wound; and
1. A method for moving a car downward in an elevator system comprising:
a first removal step of removing the shock absorber;
a first raising step of attaching a first raising platform to the counterweight so as to extend downward from the counterweight;
a second moving step of pushing up the first lifting platform by a jack disposed at a location where the shock absorber was disposed after the first lifting step, and moving the counterweight upward;
a third raising step of placing a third raising platform in a location where the shock absorber was placed after the first removing step;
a fourth moving step of disposing a jack on the third raising platform after the third raising step and moving the counterweight upward by the jack;
Equipped with
In the first removal step, the shock absorber is removed from the support device,
A method for moving a car , in which, in the third raising process, a support plate is attached to the support device using the screw holes, and the third raising platform is attached to the support plate . a second raising step of attaching a second raising platform to the first raising platform so as to extend downward from the first raising platform after the second moving step;
a third moving step of disposing a jack under the second raising platform after the second raising step, and pushing up the second raising platform with the jack to move the counterweight upward;
The method for moving a car according to claim 1 or 2, further comprising: The method further includes a second removal step performed before the first raising step,
The counterweight is
A frame supporting the adjustment weight;
a spacer provided on the frame so as to face the shock absorber;
Equipped with
In the second removing step, the spacer is removed from the frame,
A method for moving a car as described in any one of claims 1 to 3, wherein in the first raising step, the first raising platform is attached to the frame so as to be positioned in a location where the spacer was positioned. The car moving method according to any one of claims 1 to 4, wherein the third raising step is performed after the second moving step is performed. a fourth raising step of attaching a fourth raising platform to the third raising platform so as to extend upward from the third raising platform after the fourth moving step;
a fifth moving step of disposing a jack on the fourth raising platform after the fourth raising step and moving the counterweight upward by the jack;
The method for moving a car according to any one of claims 1 to 5 , further comprising: A car and a counterweight that move through a hoistway;
a support device having a first screw hole;
a shock absorber that is attached to the support device using the first screw hole and is disposed directly below the counterweight;
A rope for suspending the cage and the counterweight; and
a winch around which the rope is wound; and
Equipped with
The counterweight is
A frame having a second screw hole and supporting the adjustment weight;
a spacer that is provided to the frame using the second screw hole and faces the shock absorber;
In an elevator system having an elevator car, a device is used to move the counterweight upward by using a jack to move the car downward,
a first raising base that can be attached to the frame from which the spacer has been removed using the second screw hole;
a support plate having a third screw hole and capable of being attached to the support device from which the shock absorber has been removed using the first screw hole;
a second raiser that can be attached to the support plate using the third screw hole;
a third lifting platform that can be attached to the first lifting platform attached to the frame body and that can be attached to the second lifting platform attached to the support plate;
A raising device equipped with the above. A car and a counterweight that move through a hoistway;
a shock absorber disposed directly below the counterweight;
A rope for suspending the cage and the counterweight; and
a winch around which the rope is wound; and
1. A method for moving a car downward in an elevator system comprising:
a first removal step of removing the shock absorber;
a first moving step of disposing a first jack below the counterweight and pushing up the counterweight with the first jack to move the counterweight upward;
a first raising step of disposing a first raising platform below the counterweight after the first moving step;
a second moving step of disposing a second jack on the first raising platform after the first raising step, and pushing up the counterweight with the second jack to move the counterweight upward;
a second raising step of removing the first jack from under the counterweight after the second moving step and arranging a second raising platform below the counterweight so that an upper surface of the second raising platform is positioned at a position higher than an upper surface of the first raising platform;
a third moving step of disposing the first jack on the second raising platform after the second raising step, and pushing up the counterweight with the first jack to move the counterweight upward;
A method of moving a cage equipped with the above. a third raising step of removing the second jack from above the first raising platform after the third moving step, and arranging a third raising platform on the first raising platform so that an upper surface of the third raising platform is positioned at a higher position than an upper surface of the second raising platform;
a fourth moving step of disposing the second jack on the third raising platform after the third raising step, and pushing up the counterweight with the second jack to move the counterweight upward;
9. The method of claim 8 , further comprising: a fourth raising step of attaching a fourth raising platform so as to extend downward from the counterweight while the counterweight is supported by the first jack;
a fifth moving step of pushing up the fourth lifting platform by the second jack arranged below the counterweight after the fourth lifting step, and moving the counterweight upward;
a fifth raising step of attaching a fifth raising platform under the fourth raising platform while supporting the counterweight by the second jack after the fifth moving step;
a sixth moving step of pushing up the fifth raising platform by the first jack after the fifth raising step, and moving the counterweight upward;
The method for moving a car according to claim 8 or claim 9 , further comprising: A car and a counterweight that move through a hoistway;
a shock absorber disposed directly below the counterweight;
A rope for suspending the cage and the counterweight; and
a winch around which the rope is wound; and
1. A method for moving a car downward in an elevator system comprising:
a first removal step of removing the shock absorber;
a first moving step of disposing a first jack below the counterweight and pushing up the counterweight with the first jack to move the counterweight upward;
a first raising step of attaching a first raising platform so as to extend downward from the counterweight while the counterweight is supported by the first jack after the first moving step;
a second moving step of pushing up the first lifting platform by a second jack arranged below the counterweight after the first lifting step, and moving the counterweight upward;
a second raising step of attaching a second raising platform under the first raising platform while supporting the counterweight by the second jack after the second moving step;
a third moving step of pushing up the second lifting platform by the first jack after the second lifting step and moving the counterweight upward;
A method of moving a cage equipped with the above. a seventh moving step of disposing a third jack shorter than the first jack below the counterweight and pushing up the counterweight with the third jack to move the counterweight upward;
a positioning step of positioning a spacer below the counterweight after the seventh moving step;
an eighth moving step of, after the placing step, placing a fourth jack shorter than the first jack on the spacer, and pushing up the counterweight with the fourth jack to move the counterweight upward;
a second removal step of removing the third jack after the eighth moving step;
a third removal step performed after the first moving step and before the first raising step;
Equipped with
The second removing step is performed before the first moving step,
The moving method according to claim 8 , wherein in the third removing step, the spacer and the fourth jack are removed.

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