Method for moving a lift car and height increasing device

Abstract

In the first removal process, the buffer (12) is removed. After the first removal process, in the first moving process, the jack (30) is arranged at the place where the buffer (12) is arranged, the counterweight (2) is lifted by the jack (30), and the counterweight (2) is moved upward. After the first moving process, in the first heightening process, the heightening platform (31) is installed on the counterweight (2). After the first heightening process, in the second moving process, the jack (30) is arranged below the heightening platform (31), the heightening platform (31) is lifted by the jack (30), and the counterweight (2) is moved upward.

Description

Technical Field

[0001] This disclosure relates to a method for moving a car and a heightening device for moving the car. Background Technology

[0002] Patent Document 1 describes a method for lifting the counterweight of an elevator. By using the method described in Patent Document 1 to lift the counterweight, the car can be moved downwards even in the event of an emergency stop near the top floor.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2020 / 065774 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the method described in Patent Document 1, a pair of lifting devices are installed on the guide rail for guiding the counterweight. The operator must simultaneously operate the lifting devices located on both sides of the counterweight, resulting in poor operability.

[0008] This disclosure was made to solve the aforementioned problems. An object of this disclosure is to provide a method for moving a car with excellent workability. Another object of this disclosure is to provide a height-increasing device used in this method.

[0009] Methods for solving problems

[0010] The disclosed method for moving a car is a method for moving a car downward in an elevator system, the elevator system comprising: a car and a counterweight that move in a shaft; a buffer disposed directly below the counterweight; ropes suspending the car and the counterweight; and a traction machine wound with the ropes. The method includes: a first removal step, removing the buffer; a first movement step, after the first removal step, placing a jack at the location where the buffer was placed, and lifting the counterweight by the jacks to move the counterweight upward; a first raising step, after the first movement step, installing a first raising platform on the counterweight in a manner extending downward from the counterweight; and a second movement step, after the first raising step, placing a jack below the first raising platform, and lifting the first raising platform by the jacks to move the counterweight upward.

[0011] The disclosed method for moving a car is a method for moving a car downward in an elevator system comprising: a car and a counterweight that move in a shaft; a buffer disposed directly below the counterweight; ropes suspending the car and the counterweight; and a traction machine wound with the ropes. The method includes: a first removal step, removing the buffer; a first raising step, installing a first raising platform on the counterweight in a manner extending downward from the counterweight; and a second moving step, after the first raising step, moving the counterweight upward by jacking the first raising platform at the location where the buffer was disposed.

[0012] The disclosed lifting device is used in an elevator system to move a counterweight upward using jacks in order to move the car downward. The elevator system includes: a car and a counterweight that move in a shaft; a support device having a first threaded hole; a buffer disposed on the support device using the first threaded hole and positioned directly below the counterweight; ropes suspending the car and counterweight; and a traction machine wound with the ropes. The counterweight includes: a frame having a second threaded hole and supporting an adjusting counterweight; and a spacer disposed on the frame using the second threaded hole and opposite the buffer. The device includes: a first lifting platform that can be mounted on the frame with the spacer removed using the second threaded hole; a support plate having a third threaded hole and capable of being mounted on the support device with the buffer removed using the first threaded hole; a second lifting platform that can be mounted on the support plate using the third threaded hole; and a third lifting platform that can be mounted on the first lifting platform mounted on the frame and on the second lifting platform mounted on the support plate.

[0013] The method of moving the car disclosed herein is a method for moving the car downward in an elevator device, the elevator device comprising: a car and a counterweight that move in a shaft; a buffer disposed directly below the counterweight; ropes suspending the car and the counterweight; and a traction machine wound with the ropes. The method includes: a first removal step, removing the buffer; a first moving step, placing a first jack below the counterweight and lifting the counterweight by the first jack to move the counterweight upward; a first raising step, placing a first raising platform below the counterweight after the first moving step; a second moving step, placing a second jack on the first raising platform after the first raising step and lifting the counterweight by the second jack to move the counterweight upward; a second raising step, removing the first jack from below the counterweight after the second moving step and placing the upper surface of the second raising platform below the counterweight in a position higher than the upper surface of the first raising platform; and a third moving step, placing the first jack on the second raising platform after the second raising step and lifting the counterweight by the first jack to move the counterweight upward.

[0014] The method of moving the car disclosed herein is a method for moving the car downward in an elevator device, the elevator device comprising: a car and a counterweight that move in a shaft; a buffer disposed directly below the counterweight; ropes suspending the car and the counterweight; and a traction machine wound with the ropes. The method includes: a first removal step, removing the buffer; a first moving step, placing a first jack below the counterweight and lifting the counterweight with the first jack to move the counterweight upward; a first raising step, after the first moving step, installing a first raising platform extending downward from the counterweight while the counterweight is supported by the first jack; a second moving step, after the first raising step, lifting the first raising platform with a second jack placed below the counterweight to move the counterweight upward; a second raising step, after the second moving step, installing a second raising platform below the first raising platform while the counterweight is supported by the second jack; and a third moving step, after the second raising step, lifting the second raising platform with the first jack to move the counterweight upward.

[0015] Invention Effects

[0016] According to this disclosure, the car can be easily moved downwards. Attached Figure Description

[0017] Figure 1 This is a diagram showing an example of an elevator system.

[0018] Figure 2 This is a diagram showing an example of the pit at the bottom of a shaft.

[0019] Figure 3 This is a flowchart illustrating the method of moving the car downwards.

[0020] Figure 4 This is a diagram used to illustrate the method of moving the car.

[0021] Figure 5 This is a diagram used to illustrate the method of moving the car.

[0022] Figure 6 This is a diagram used to illustrate the method of moving the car.

[0023] Figure 7 This is a diagram used to illustrate the method of moving the car.

[0024] Figure 8 This is a diagram used to illustrate the method of moving the car.

[0025] Figure 9 This is a diagram used to illustrate the method of moving the car.

[0026] Figure 10 This is a diagram used to illustrate the method of moving the car.

[0027] Figure 11 This is a diagram used to illustrate the method of moving the car.

[0028] Figure 12 This is a diagram used to illustrate the method of moving the car.

[0029] Figure 13 This is a diagram used to illustrate the method of moving the car.

[0030] Figure 14 This is a diagram used to illustrate the method of moving the car.

[0031] Figure 15 This diagram illustrates other methods of fixing the booster platform.

[0032] Figure 16 This is a flowchart illustrating the method of moving the car downwards.

[0033] Figure 17 This is a flowchart illustrating the method of moving the car downwards.

[0034] Figure 18 This is a diagram used to illustrate the method of moving the car.

[0035] Figure 19 This is a diagram used to illustrate the method of moving the car.

[0036] Figure 20 This is a diagram used to illustrate the method of moving the car.

[0037] Figure 21 This is a diagram used to illustrate the method of moving the car.

[0038] Figure 22 This is a diagram used to illustrate the method of moving the car.

[0039] Figure 23 This is a diagram used to illustrate the method of moving the car.

[0040] Figure 24 This is a diagram used to illustrate the method of moving the car.

[0041] Figure 25 This is a diagram used to illustrate the method of moving the car.

[0042] Figure 26 This is a diagram used to illustrate the method of moving the car.

[0043] Figure 27 This is a diagram used to illustrate the method of moving the car.

[0044] Figure 28 This is a diagram used to illustrate the method of moving the car.

[0045] Figure 29 This is a diagram used to illustrate the method of moving the car.

[0046] Figure 30 This is a diagram used to illustrate the method of moving the car.

[0047] Figure 31 This is a diagram used to illustrate the method of moving the car.

[0048] Figure 32 This is a diagram used to illustrate the method of moving the car.

[0049] Figure 33 This is a diagram used to illustrate the method of moving the car.

[0050] Figure 34 This is a diagram used to illustrate the method of moving the car.

[0051] Figure 35 It means Figure 18 A diagram of the DD section.

[0052] Figure 36 yes Figure 19 The diagram shown corresponds to the cross-section of the pit.

[0053] Figure 37 yes Figure 20 The diagram shown corresponds to the cross-section of the pit.

[0054] Figure 38 This is a diagram showing an example of a support platform and a jack.

[0055] Figure 39 This is a diagram showing an example of a support plate.

[0056] Figure 40 This is a diagram illustrating an example of a riser platform. Detailed Implementation

[0057] The following is a detailed description with reference to the accompanying drawings. Repetitive descriptions have been simplified or omitted where appropriate. In the drawings, the same reference numerals denote the same or equivalent parts.

[0058] Implementation method 1.

[0059] Figure 1 This diagram illustrates an example of an elevator system. The elevator system includes a car 1 and a counterweight 2. The car 1 moves up and down in a shaft 3. The counterweight 2 also moves up and down in the shaft 3. The car 1 and counterweight 2 are suspended from the shaft 3 by ropes 4.

[0060] Rope 4 is wound around traction machine 5. Specifically, rope 4 is wound around sheave 6 of traction machine 5. Traction machine 5 drives car 1. Control device 7 controls traction machine 5. That is, the movement of car 1 is controlled by control device 7. Traction machine 5 and control device 7 are located at the top of hoistway 3.

[0061] As an example, Figure 1 This refers to an elevator system using a 2:1 rope winding method. In Figure 1 In the example shown, one end 4a of the rope 4 is located at the top of the shaft 3. The other end 4b of the rope 4 is located at the top of the shaft 3. The car 1 is equipped with suspension sheaves 8 and 9. The counterweight 2 is equipped with suspension sheave 10. The rope 4 extends downward from end 4a and is wound sequentially around suspension sheaves 8, 9, 6, and 10.

[0062] A buffer 11 and a buffer 12 are installed in the pit 3a of the hoistway 3. The buffer 11 is located directly below the car 1. The buffer 12 is located directly below the counterweight 2.

[0063] Communication device 13 is connected to control device 7. Communication device 13 is used for communication between the elevator system and external entities. Communication device 13 communicates with external entities via network 14. These external entities include remote monitoring centers that monitor the elevator system.

[0064] Normally, when a malfunction occurs in such an elevator system, workers move from floor 15 to the car 1 to perform restoration work. However, if a malfunction or power outage occurs in the elevator system, it may be impossible to move the car 1 using electricity. In such cases, if the car 1 stops near, for example, the top floor floor 15, workers cannot move onto the car 1.

[0065] Even if the car 1 cannot be moved electrically, it may sometimes move if the braking device (not shown) of the traction machine 5 can be manually released. However, if the traction machine 5 is located at the top of the hoistway 3, the braking device cannot be operated unless the operator moves onto the car 1. Even if the braking device can be released, if the car 1 is lighter than the counterweight 2, the operator must place the heavy load on the car 1, which is stopped near the top floor, to make the car 1 heavier than the counterweight 2.

[0066] Therefore, the operator moves the counterweight 2 upward in the pit 3a of the hoistway 3, thereby moving the car 1 downward to a position where it can be moved from the landing 15 onto the car 1. The method will now be described in detail.

[0067] Figure 2This is a diagram showing an example of the pit 3a of the shaft 3. In addition to the suspension wheel 10, the counterweight 2 also includes an adjustment counterweight 21, a frame 22, guide rollers 23, and spacers 24.

[0068] The adjusting counterweight 21 is used to adjust the overall weight of the counterweight 2. The adjusting counterweight 21 is supported on the frame 22. The suspension wheel 10 is rotatably mounted on the frame 22. In addition, a guide roller 23 is provided on the frame 22. The guide roller 23 rotates while in contact with the guide rail 16, thereby guiding the movement of the counterweight 2 by the guide rail 16. The counterweight 2 may also have guide shoes instead of the guide roller 23.

[0069] The guide rail 16 extends vertically from the pit 3a. The lower end of the guide rail 16 is supported by the support device 17. The support device 17 forms the floor of the pit 3a. The support device 17 is positioned below the counterweight 2 such that it connects the lower end of one guide rail 16 to the lower end of the other guide rail 16.

[0070] The buffer 12 is a device used to mitigate the impact of the counterweight 2 when it falls. Therefore, the buffer 12 is positioned directly below the counterweight 2. The buffer 12 is provided on the support device 17 in a manner that projects upwards from the support device 17. Figure 2 In the example shown, the support device 17 has a threaded hole (not shown). This threaded hole is formed on the upward-facing surface of the support device 17. The buffer 12 is mounted on the support device 17 using this threaded hole. A bolt 18 passes through the base portion of the buffer 12 and is screwed into the threaded hole. Hereinafter, this threaded hole formed in the support device 17 will also be referred to as threaded hole A.

[0071] The spacer 24 is a component that collides with the buffer 12 from above when the counterweight 2 falls. Therefore, the spacer 24 is arranged opposite to the buffer 12. The spacer 24 is provided in the frame 22 so as to protrude downwards from the frame 22. Figure 2 In the example shown, the frame 22 has a threaded hole (not shown). This threaded hole is formed on the downward-facing surface of the frame 22. The spacer 24 is disposed on the frame 22 using this threaded hole. A bolt 25 passes through the upper flange portion of the spacer 24 and is screwed into the threaded hole. Hereinafter, this threaded hole formed in the frame 22 will also be referred to as threaded hole B.

[0072] Figure 3 This is a flowchart illustrating the method of moving the car 1 downwards. Figures 4 to 14 This is a diagram used to illustrate the method of moving the car 1. Figures 4 to 14 This refers to the pit 3a of the hoistway 3. For example, when a power outage occurs and the car 1 stops near the uppermost landing 15, the counterweight 2... Figure 2 It is positioned directly above buffer 12 as shown.

[0073] The workers first enter the pit 3a of the shaft 3 from the lowest station 15 (S101). In the pit 3a, the workers remove the buffer 12 from under the counterweight 2 (S102). Specifically, in S102, the workers loosen the bolts 18 and remove the buffer 12 from the support device 17.

[0074] Additionally, the workers remove the spacer 24 from the counterweight 2 in the pit 3a (S103). Specifically, the workers loosen the bolts 25 in S103 to remove the spacer 24 from the frame 22. The removal procedure shown in S103 can also be performed before the removal procedure shown in S102. Figure 4 This indicates the state after the buffer 12 has been removed from the support device 17 and the spacer 24 has been removed from the frame 22.

[0075] Next, the operator places the jack 30 under the counterweight 2 (S104). Specifically, the operator places the jack 30 in a location where the buffer 12, which was removed in S102, was previously placed. Furthermore, "place the jack 30 in a location where the buffer 12 was previously placed" includes the case where only a portion of the jack 30 is placed in the location where the buffer 12 was previously placed. Figure 5 This indicates that in S104, jack 30 is positioned below counterweight 2. Jack 30 is, for example, a hydraulic jack. Figure 5 This indicates that the upper end of the jack 30 is in contact with the frame 22 from below.

[0076] Next, the operator uses jack 30 to lift counterweight 2, causing it to move upwards (S105). After moving counterweight 2 upwards, the operator removes jack 30 from under counterweight 2 (S106).

[0077] When the counterweight 2 moves upward in S105, the rope 4 slacks. The rotation of the pulley 6 is prevented by the braking device of the traction machine 5, so even though the rope 4 is slack, the pulley 6 will not rotate. However, the weight of the car 1 acts on the rope 4. Therefore, when the counterweight 2 moves upward in S105, the rope 4 slides on the pulley 6, thereby moving the car 1 downward. Furthermore, when tension is applied to the rope 4 by the downward movement of the car 1, even if the jack 30 is removed from under the counterweight 2, the car 1 and the counterweight 2 will not move.

[0078] After the workers remove the jack 30 from under the counterweight 2, they install the riser 31 onto the counterweight 2 (S107). Figure 6 This indicates that in the heightening process of S107, the lifting platform 31 is installed on the counterweight 2. The lifting platform 31 is installed on the counterweight 2 in a manner that extends downward from the counterweight 2.

[0079] The riser 31 can also be mounted on the frame 22 using the threaded hole B formed in the frame 22. Figure 6 This indicates that the riser platform 31 is mounted to the downward-facing surface of the frame 22 by bolts 25. The bolts 25 pass through the upper flange portion of the riser platform 31 and are screwed into the threaded hole B. Figure 6 In the example shown, the riser platform 31 is positioned in a location where the spacer 24, which was removed in S103, was previously configured. Furthermore, "positioned in a location where the spacer 24 was previously configured" includes the case where only a portion of the riser platform 31 is positioned in a location where the spacer 24 was previously configured.

[0080] Next, the workers installed jacks 30 below the riser 31 installed in S107 (S108). Specifically, the workers installed jacks 30 in the area where buffer 12 was installed. Figure 7 This indicates that the jack 30 is positioned below the riser platform 31 in S108.

[0081] Next, the workers used jack 30 to lift the raising platform 31, causing the counterweight 2 to move upward (S109). Figure 8 This indicates that the lifting platform 31 is lifted by the jack 30. As described above, by using the jack 30, the counterweight 2 is moved upwards, and the car 1 is moved downwards.

[0082] After the operator moves car 1 downwards, they determine whether it is necessary to move car 1 further (S110). If car 1 is positioned at a height at which the operator can move from the top landing 15 onto car 1, then S110 determines "No". If the operator cannot board car 1 without moving it further downwards, then S110 determines "Yes". When S110 determines "Yes", the series of actions shown in S106 to S109 are repeated.

[0083] For example, when the operator determines "yes" in S110 after lifting the booster platform 31 with jack 30, jack 30 is removed from under the booster platform 31 (S106). Then, in the lifting process in S107, the operator further installs the booster platform 32 onto the booster platform 31 installed at the counterweight 2. Figure 9 This indicates that in S107, the booster platform 32 is installed on the booster platform 31. The booster platform 32 is installed on the booster platform 31 in a manner that extends downward from the booster platform 31.

[0084] As an example, mounting holes are formed on the flange portion of the lower side of the riser platform 31. Mounting holes are formed on the flange portion of the upper side of the riser platform 32. The riser platform 32 is fixed to the riser platform 31 by bolts passing through these mounting holes and nuts that are inserted into the bolts.

[0085] Next, the workers installed jacks 30 below the riser 32 installed in S107 (S108). Specifically, the workers installed jacks 30 in the area where buffer 12 was installed. Figure 10 This indicates that in S108, the jack 30 is positioned below the riser platform 32.

[0086] Next, the operators use jack 30 to lift the booster platform 32, causing the counterweight 2 to move upward (S109). As a result, the car 1 moves downward.

[0087] Figure 11 This indicates that in S110, the determination is further "yes," meaning that the booster platform 33 has been installed below the booster platform 32. Additionally, Figure 11 This indicates that in S109, the lifting platform 33 is lifted by the jack 30. If the lifting process is carried out in S107 after S110 is determined to be "yes", the operator only needs to install the additional lifting platform at the bottom position of the lifting platform installed in the counterweight 2.

[0088] As another example, in the raising process of S107, the raising platform can also be placed on the support device 17. For example, after the raising platform 33 is installed in S107, if the determination is "yes" in S110, the operator removes the jack 30 from under the raising platform 33 (S106). Then, in the raising process of S107, the operator places the raising platform 34 on the support device 17. Figure 12 This indicates that in S107, the booster platform 34 is configured in the location where the buffer 12 was configured. Additionally, "configure the booster platform 34 in the location where the buffer 12 was configured" includes the case where only a portion of the booster platform 34 is configured in the location where the buffer 12 was configured.

[0089] Next, the operator places a jack 30 on the lifting platform 34 placed on the support device 17 in S107 (S108). Then, the operator lifts the lifting platform 33 by using the jack 30 placed on the lifting platform 34, thereby moving the counterweight 2 upward (S109). Figure 13 This indicates that the lifting platform 33 is lifted by the jack 30 placed on the lifting platform 34. As a result, the car 1 moves downward.

[0090] If, after setting up the riser platform 34 in S107, the determination in S110 is further "yes", the operator can also place a riser platform 35 on top of the riser platform 34 during the riser process in S107. For example, when in Figure 13When the status shown is determined to be "yes" in S110, the operator removes the jack 30 from the riser platform 34 (S106). Next, in the riser process of S107, the operator installs the riser platform 35 on the riser platform 34. Figure 14 This indicates that in S107, a booster platform 35 is installed at the booster platform 34. The booster platform 35 is installed on the booster platform 34 in such a way that it extends upward from the booster platform 34.

[0091] As an example, mounting holes are formed on the upper flange portion of the riser platform 34. Mounting holes are formed on the lower flange portion of the riser platform 35. The riser platform 35 is fixed to the riser platform 34 by bolts passing through these mounting holes and nuts that are inserted into the bolts.

[0092] Next, the operator places a jack 30 on the booster platform 35 installed in S107 (S108). Then, the operator lifts the booster platform 33 using the jack 30 placed on the booster platform 35, causing the counterweight 2 to move upward (S109). As a result, the car 1 moves downward.

[0093] Furthermore, as the number of lifting platforms stacked on the support device 17 increases, the operation of the jack 30 becomes difficult. If the height of one lifting platform is about 50cm, the number of lifting platforms stacked on the support device 17 is preferably no more than two.

[0094] If the result in S110 is "No", the operator moves to the top floor station 15. Then, the operator opens the door at the top floor station 15 and moves from station 15 onto the car 1 (S111). The operator can then perform the necessary restoration work on the car 1.

[0095] In the method shown in this embodiment, the operator can move the car 1 upward using the jack 30. Therefore, this method has excellent operability. The operator can move the car 1 downward in a shorter time and with less labor.

[0096] Figure 1 This illustrates an example where the traction machine 5 and control device 7 are located at the top of the shaft 3. The location where the traction machine 5 and control device 7 are located is not limited to the top of the shaft 3.

[0097] In this embodiment, a method for moving the car 1 using a single jack 30 is described. However, the operator may also use multiple jacks to move the car 1. For example, depending on the space formed under the counterweight 2, a short jack may be used in S104, and a long jack in S108.

[0098] In this embodiment, an example of simply placing the riser platform 34 on the support device 17 is described. This is just one example. The riser platform 34 can also be fixed to the support device 17 using bolts or the like. For example, a mounting hole is formed on the flange portion on the lower side of the riser platform 34, corresponding to the position of the threaded hole A. The bolt 18 passes through the flange portion on the lower side of the riser platform 34 and is screwed into the threaded hole A.

[0099] Figure 15 This diagram illustrates other fixing methods for the riser platform 34. Figure 15 In the example shown, the step-up platform 34 is fixed to the support device 17 via a support plate 36. During the step-up process in S107, the operator uses the threaded hole A to install the support plate 36 onto the support device 17. For example, a mounting hole is formed on the support plate 36 at the same position as the threaded hole A. A bolt 18 passes through the support plate 36 and is screwed into the threaded hole A.

[0100] Additionally, a threaded hole (not shown) is formed in the support plate 36. Hereinafter, this threaded hole in the support plate 36 will also be referred to as threaded hole C. The riser platform 34 is mounted to the support plate 36 using threaded hole C. For example, a mounting hole is formed on the flange portion on the lower side of the riser platform 34, corresponding to the position of threaded hole C. A bolt 37 passes through the flange portion on the lower side of the riser platform 34 and is screwed into threaded hole C.

[0101] In this embodiment, an example is described where the frame 22 is lifted immediately after the buffer 12 and spacer 24 are removed using the jack 30. This is an example. If space can be ensured for the jack 30 under the lift platform 31 even after the buffer 12 and spacer 24 are removed and the lift platform 31 is installed on the frame 22, then the actions shown in S104 to S106 after S103 may not be performed.

[0102] Alternatively, if threaded holes or mounting holes for mounting the lifting platform 31 are formed in the spacer 24, and space can be ensured for the jack 30 to be positioned below the spacer 24 even without removing the spacer 24, then the operation shown in S103 need not be performed. In this case, in the lifting process of S107, the lifting platform 31 is mounted on the spacer 24 in a manner that extends downward from the counterweight 2.

[0103] In this embodiment, an example is described where the booster platforms 32 to 35 have the same shape. Therefore, for example, booster platform 32 can also be installed on booster platform 34. Booster platform 35 can also be installed on booster platform 33. Booster platforms 32 to 35 may not have the same shape. Booster platforms 31 to 35 may also have the same shape. Furthermore, in the example shown in this embodiment, booster platforms 32 to 35 can be used identically even if they are arranged vertically oppositely.

[0104] Implementation method 2.

[0105] In this embodiment, an example of always supporting the counterweight 2 and moving the car 1 downward will be described. Figure 16 and Figure 17 This is a flowchart illustrating the method of moving the car 1 downwards. Figure 16 and Figure 17 This refers to a series of actions performed by the workers.

[0106] Figures 18 to 34 This is a diagram used to illustrate the method of moving the car 1. Figures 18 to 34 This refers to the pit 3a at the bottom of the shaft 3. In this embodiment, for the counterweight 2, as... Figure 18 An example of the car 1 stopping while supported by the buffer 12 will be described. In the example shown in this embodiment, the operator also moves the counterweight 2 upward in the pit 3a of the hoistway 3, thereby moving the car 1 downward to a position where it can be moved from the landing 15 onto the car 1.

[0107] Figure 35 It means Figure 18 A diagram of the DD cross-section. In the example shown in this embodiment, the buffer 12 is fixed to the block-shaped base portion 19 of the support device 17 using bolts 18. Figure 18 and Figure 35 The details of the structure of the support device 17 supporting the guide rail 16 are omitted.

[0108] Workers enter the pit 3a of the shaft 3 from the lowest level station 15 (S201). In the pit 3a, workers first set up a support platform 40 and jacks 41 (S202). Figure 19 This indicates that the jack 41 is set to a certain state in S202. Figure 36 yes Figure 19 The pit 3a shown is at cross section EE (refer to...) Figure 35 (A similar diagram.)

[0109] In S202, the workers first removed four bolts 18 to ensure space for setting up the support platform 40, etc. Then, the workers proceeded as follows... Figure 36 A support platform 40 is provided as shown. Figure 36 In the example shown, the support platform 40 is configured as part of a further resting on the buffer 12 resting on the base portion 19.

[0110] Next, the workers, as Figure 36A jack 41 is shown mounted on the support platform 40. The jack 41 is positioned directly below the frame 22 of the counterweight 2. As an example, the jack 41 is a small hydraulic jack that can be positioned below the counterweight 2 while the counterweight 2 is supported by the buffer 12. The jack 41 is positioned adjacent to the buffer 12.

[0111] Next, the operator uses jack 41 to lift counterweight 2, moving it upwards (S203). In the moving process shown in S203, counterweight 2 is supported by buffer 12 until the front end of jack 41 contacts the frame 22. When the front end of jack 41 contacts the frame 22, counterweight 2 moves away from buffer 12. Thus, counterweight 2 is supported by jack 41, and the load of counterweight 2 no longer acts on buffer 12.

[0112] Next, the operator sets up a support platform 42 and a jack 43 below the counterweight 2 (S204). During the process shown in S204, the counterweight 2 is supported by the jack 41. Figure 20 This indicates that the jack 43 is set in state S204. Figure 37 yes Figure 20 The diagram shown is equivalent to the cross section of EE for pit 3a.

[0113] Figure 38 This is a diagram showing an example of the support platform 42 and the jack 43. In S204, the operator first... Figure 37 A support platform 42 is provided as shown. The support platform 42 is arranged such that it spans the base portion 19 and the buffer 12. That is, in Figure 20 and Figure 37 In the state shown, the support platform 42 is not in contact with the base portion 19 and the buffer 12.

[0114] Next, the workers, as Figure 37 As shown, a jack 43 is mounted on the support platform 42. 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 buffer 12 such that the buffer 12 is positioned between the jack 41 and the jack 43.

[0115] Next, the workers used jack 43 to lift counterweight 2, causing it to move upwards (S205). For example... Figure 37 As shown, the upper surface of the support platform 42 is positioned higher than the upper surface of the support platform 40. In the moving process shown in S205, the counterweight 2 is supported by the jack 41 until the front end of the jack 43 contacts the frame 22. When the front end of the jack 43 contacts the frame 22, the counterweight 2 moves away from the jack 41. Thus, the counterweight 2 is supported by the jack 43, and the load of the counterweight 2 no longer acts on the jack 41.

[0116] Next, the workers remove the support platform 40 and jack 41 from under the counterweight 2. Then, the workers remove the buffer 12 from under the counterweight 2 (S206). During the removal process shown in S206, the counterweight 2 is supported by jack 43. Figure 21 This indicates that the state of buffer 12 has been removed in S206.

[0117] Next, the operator will reposition the jack 41, which was removed in S206, to a higher position (S207). During the repositioning process shown in S207, the counterweight 2 is supported by the jack 43. Figure 22 This indicates that the jack 41 has been re-set in S207.

[0118] In step S207, the operator first positions the support platform 44 directly below the frame 22 of the counterweight 2. For example, the support platform 44 has the same shape as the support platform 42. Next, the operator places a spacer 45 on the support platform 44, positioning the spacer 45 directly below the frame 22 of the counterweight 2. The spacer 45 is a component used to position the jack 41 at a higher position than the jack 43.

[0119] Next, the workers install jack 41 on top of spacer 45. Jack 41 is thus positioned at a height higher than spacer 45 than jack 43. Furthermore, jack 41 is positioned directly below the frame 22 of counterweight 2.

[0120] Next, the operator uses jack 41, which is positioned on the spacer 45, to lift the counterweight 2, causing it to move upwards (S208). In the moving process shown in S208, the counterweight 2 is supported by jack 43 until the front end of jack 41 contacts the frame 22. When the front end of jack 41 contacts the frame 22, the counterweight 2 moves away from jack 43. Thus, the counterweight 2 is supported by jack 41, and the load of the counterweight 2 no longer acts on jack 43.

[0121] Next, the workers remove the support platform 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 This indicates that jack 43 has been removed from S209.

[0122] Next, the operator installs the lifting platform 50 onto the counterweight 2 (S210). Additionally, the operator places a support plate 46 and a jack 47 below the counterweight 2 (S211). During the processes shown in S210 and S211, the counterweight 2 is supported by the jack 41. Figure 24 This indicates that the jack 47 is set in state S211.

[0123] In S210, the riser 50 is installed on the counterweight 2 in such a way that it extends downward from the counterweight 2. Figure 24 This illustrates an example where the booster platform 50 is installed on the downward-facing side of the frame 22. As described above, during the installation of the booster platform 50 onto the counterweight 2, the counterweight is also supported by the jack 41. The jack 41 is pre-positioned so as not to interfere with the booster platform 50 during the operation in S210.

[0124] Figure 39 This is a diagram showing an example of a support plate 46. The support plate 46 is a plate-shaped component. In S211, the operator first installs the support plate 46 onto the base portion 19. As an example, the support plate 46 is bolted to the base portion 19 using four threaded holes through which bolts 18 are installed.

[0125] Next, the operator places a jack 47 on the support plate 46. As an example, the jack 47 is a hydraulic jack that is longer than the jacks 41 and 43. The jack 47, placed on the support plate 46, is positioned directly below one end of the lifting platform 50 of the counterweight 2.

[0126] Next, the operator uses jack 47 to lift the counterweight 2, causing the counterweight 2 to move upward (S212). Specifically, the operator lifts the counterweight 2 by bringing the front end of jack 47 into contact with the riser platform 50.

[0127] In the moving process shown in S212, the counterweight 2 is supported by jack 41 until the front end of jack 47 contacts the riser platform 50. When the front end of jack 47 contacts the riser platform 50, the counterweight 2 moves away from jack 41. Thus, the counterweight 2 is supported by jack 47, and the load of the counterweight 2 no longer acts on jack 41. Figure 25 This indicates the state where weight 2 is lifted by jack 47.

[0128] Next, the workers remove the support platform 44, spacer 45, and jack 41 from under the counterweight 2 (S213). During the removal process shown in S213, the counterweight 2 is supported by jack 47.

[0129] Next, the operator sets up a booster platform 51 and a jack 48 below the counterweight 2 (S214). During the process shown in S214, the counterweight 2 is supported by the jack 47. Hereinafter, the booster platform located below the jack 48 will be labeled 51. As will be described later, multiple booster platforms 51 are arranged below the jack 48. The "-N" following the label 51 indicates the Nth booster platform 51 from the bottom. Figure 26 This indicates that the riser platform 51-1 and jack 48 are set in S214.

[0130] In step S214, the operator first installs a booster platform 51-1 on the support plate 46. For example, the booster platform 51-1 is bolted to the support plate 46. Next, the operator installs a jack 48 on the booster platform 51-1. Thus, the jack 48 is positioned at a height higher than the jack 47 above the booster platform 51-1. For example, the jack 48 is a hydraulic jack longer than both the jacks 41 and 43. Preferably, the jack 48 is the same type of hydraulic jack as the jack 47. The jack 48, positioned on the booster platform 51-1, is located directly below the other end of the booster platform 50, which is installed on the counterweight 2.

[0131] Next, the operator lifts the counterweight 2 using jack 48, causing the counterweight 2 to move upward (S215). Specifically, the operator lifts the counterweight 2 by bringing the front end of jack 48 into contact with the riser platform 50.

[0132] In the moving process shown in S215, the counterweight 2 is supported by jack 47 until the front end of jack 48 contacts the riser platform 50. When the front end of jack 48 contacts the riser platform 50, the riser platform 50 moves away from jack 47. Thus, the counterweight 2 is supported by jack 48, and the load of the counterweight 2 no longer acts on jack 47.

[0133] Next, the operator removes jack 47 from under counterweight 2 (S216). After removing jack 47 from under counterweight 2, the operator reinstalls jack 47 on the basis of the riser platform 52 below counterweight 2 (S217). During the processes shown in S216 and S217, counterweight 2 is supported by jack 48.

[0134] Hereinafter, the lifting platform located below the jack 47 will be labeled 52. As an example, the lifting platform 52 has the same shape as the lifting platform 51. As will be described later, multiple lifting platforms 52 will be arranged below the jack 47. The "-N" following the label 52 indicates the Nth lifting platform 52 from the bottom. Figure 27 This indicates that the riser platforms 52-1 to 52-2 and the jack 47 are set in S217.

[0135] In step S217, the operator installs a booster platform 52-1 on the support plate 46. For example, booster platform 52-1 is bolted to the support plate 46. Next, the operator installs a booster platform 52-2 on top of booster platform 52-1. Thus, the upper surface of booster platform 52-2 is positioned higher than the upper surface of booster platform 51-1 on which the jack 48 is mounted. The operator then installs a jack 47 on booster platform 52-2. The jack 47, positioned on booster platform 52-2, is located directly below one end of booster platform 50, which is mounted on counterweight 2.

[0136] In this embodiment, a preferred example is shown where the lifting platform 51 and the lifting platform 52 are of the same shape, so that both lifting platforms 52 are positioned below the counterweight 2 in S217. As another example, the operator may also ensure the required height by positioning one lifting platform 52 below the counterweight 2 in S217.

[0137] Next, the operator uses jack 47 to lift the counterweight 2, causing the counterweight 2 to move upward (S218). Specifically, the operator lifts the counterweight 2 by bringing the front end of jack 47 into contact with the riser platform 50.

[0138] In the moving process shown in S218, the counterweight 2 is supported by jack 48 until the front end of jack 47 contacts the lifting platform 50. When the front end of jack 47 contacts the lifting platform 50, the lifting platform 50 moves away from jack 48. Thus, the counterweight 2 is supported by jack 47, and the load of the counterweight 2 no longer acts on jack 48.

[0139] Next, the operator determines whether further raising of the counterweight 2 is necessary (S219). This raising process involves adding a platform below jacks 47 and 48 to move the counterweight 2 upwards. If jacks 47 and 48 are positioned too high, their operation becomes difficult. If, after moving the counterweight 2 upwards in S218, the operator determines that moving jack 48 further upwards would make its operation difficult, then in S219, a "No" decision is made. Alternatively, after moving the counterweight 2 upwards in S215, if the operator determines that moving jack 47 further upwards would make its operation difficult, then in S219, a "No" decision is made.

[0140] On the other hand, if the operator moves the counterweight 2 upward in S218 and determines that there are no particular problems with the operation of jack 48 even if jack 48 is moved further upward, then the operator determines "yes" in S219. If the operator moves the counterweight 2 upward in S215 and determines that there are no particular problems with the operation of jack 47 even if jack 47 is moved further upward, then the operator determines "yes" in S219.

[0141] When the determination in S219 is "yes", the operator removes jack 48 from under counterweight 2 (S220). After removing jack 48 from above the riser platform 51-1, the operator adds riser platform 51 above riser platform 51-1 and resets jack 48 (S214). Figure 28This indicates that lifting platforms 51-2 to 51-3 have been added above lifting platform 51-1, and jack 48 is installed on lifting platform 51-3. The upper surface of lifting platform 51-3 is positioned higher than the upper surface of lifting platform 52-2 on which jack 47 is placed. Alternatively, operators can ensure the necessary height by placing one lifting platform 51 below counterweight 2 during this process.

[0142] Next, the workers used jack 48 to lift counterweight 2, causing counterweight 2 to move upward (S215). Figure 29 Indicates weight 2 from Figure 28 The state shown is the state where the device is lifted. As an example, the operator is... Figure 29 The state shown is determined as "No" in S219.

[0143] When the determination is "yes" immediately following the movement process shown in S215 in S219, the operator positions the jack 47 at the same height as the jack 48 by adding an extension platform 52 below the jack 47 (S221). If yes Figure 29 In the example shown, the operator adds a booster platform 52-3 below the jack 47 in S221. During this time, the counterweight 2 is supported by the jack 48. Furthermore, if the operator determines "yes" immediately after the movement process shown in S218 in S219, the jack 48 is positioned at the same height as the jack 47 by adding a booster platform 51 below it (S221).

[0144] When jacks 47 and 48 are positioned at the same height in S221, the operator performs the upper raising procedure. The upper raising procedure involves adding a raising platform above jacks 47 and 48 to move the counterweight 2 upwards. First, the operator installs the raising platform 53 onto the raising platform 50 (S222). During the raising procedure shown in S222, the counterweight 2 is supported by jack 48.

[0145] In S222, the booster platform 53 is installed on the counterweight 2 in a manner that extends downward from the counterweight 2. In the example shown in this embodiment, the booster platform 53 is installed on the counterweight 2 via the booster platform 50. Hereinafter, the booster platform arranged in a manner that extends downward from the counterweight 2 will be labeled 53. As will be described later, multiple booster platforms 53 are connected below the counterweight 2 via the booster platform 50. The "-N" following the label 53 indicates the Nth booster platform 53 from the top. Figure 30 This indicates that the riser platform 53-1 is installed on the downward-facing side of the riser platform 50.

[0146] Figure 40This diagram illustrates an example of a booster platform 53. The upper and lower flanges of the booster platform 53 have cutouts 53a formed to prevent interference with the plungers of the jack 47 or jack 48. For example, as... Figure 30 As shown, consider the case where the lifting platform 53-1 is installed on the lifting platform 50 while the counterweight 2 is supported by the jack 48. In this case, even though the lifting platform 53-1 is installed on the lifting platform 50, the lifting platform 53-1 does not contact the jack 48. The plunger of the jack 48 is positioned in the cutout 53a of the lifting platform 53-1. Figure 30 In the example shown, the cut 53a of the riser 53-1 faces the F direction.

[0147] exist Figure 30 In the shown configuration, the front end of jack 47 faces the downward-facing side of the lift platform 53-1. After the lift platform 53-1 is installed on the lift platform 50, the operator uses jack 47 to lift the lift platform 53-1, causing the counterweight 2 to move upward (S223). The counterweight 2 is supported by jack 48 until the front end of jack 47 contacts the lift platform 53-1. When the front end of jack 47 contacts the lift platform 53-1, the lift platform 50 moves away from jack 48. Thus, the counterweight 2 is supported by jack 47, and the load of the counterweight 2 no longer acts on jack 48. Figure 31 This indicates that the lifting platform 53-1 is being lifted by jack 47.

[0148] Next, the operator determines whether a further lifting process (S224) is required. If the car 1 is positioned at a height at which the operator can move from the top landing 15 to the car 1, the operator determines "No" in S224. If the operator cannot climb onto the car 1 without moving the car 1 further downward, the operator determines "Yes" in S224.

[0149] Workers should be in Figure 31 When the state is determined to be "yes" in S224, such as Figure 32 As shown, with counterweight 2 supported by jack 47, lift platform 53-2 is installed below lift platform 53-1 (S222). Specifically, if "yes" is determined in S224, the operator lowers the plunger of jack 48. Then, the operator installs lift platform 53-2 onto the downward-facing surface of lift platform 53-1 by positioning the plunger of jack 47 in the notch 53a of lift platform 53-2. That is, in Figure 32 In the example shown, the cut 53a of the riser platform 53-2 faces the G direction. Then, the operator lifts the riser platform 53-2 using jack 48, causing the counterweight 2 to move upward (S223).

[0150] The operator repeats the heightening process above until it is determined as "no" in S224. Figure 33 This indicates a situation where riser platforms 53-1 to 53-6 are connected below riser platform 50. Figure 33 In the example shown, the cut 53a of the riser platform 53-6 faces the G direction. Additionally, the counterweight 2 is supported by jack 48.

[0151] Figure 34 This indicates that a height adjustment platform 53-7 has been installed below the existing platform 53-6. Platforms 53-1 through 53-6 are identical in shape. Platform 53-7 is shorter than platform 53-1. For example, if platform 53-7 is lifted using jack 47, the operator will determine whether it is correct in step S224.

[0152] If the result in S224 is "No", the operator moves to the top floor station 15. Then, the operator opens the door at the top floor station 15 and moves from station 15 onto the car 1 (S225). The operator can then perform the necessary restoration work on the car 1.

[0153] In the method shown in this embodiment, the operator is also able to move the car 1 downward in a shorter time and with less labor.

[0154] In this embodiment, an example using small jacks 41 and 43 and large jacks 47 and 48 is described. If the operator does not need to use the large jacks 47 and 48 with their long stroke, they can also use only the small jacks 41 and 43 to move the car 1 downward. Alternatively, if the operator does not need to use the small jacks 41 and 43 with their short stroke, they can also use only the large jacks 47 and 48 to move the car 1 downward.

[0155] In this embodiment, an example is described where the upper raising process is performed after the lower raising process. If the operator can position the car 1 at the desired height even without performing the upper raising process, then the car 1 can be moved downwards by performing only the lower raising process. Furthermore, if the operator can position the car 1 at the desired height even without performing the lower raising process, then the car 1 can be moved downwards by performing only the upper raising process.

[0156] Industrial availability

[0157] The method for moving the car disclosed herein can be used in elevator systems in which the car and counterweight are suspended from the shaft by ropes.

[0158] Label Explanation

[0159] 1: Car, 2: Counterweight, 3: Hoistway, 3a: Pit, 4: Rope, 4a-4b: End, 5: Traction machine, 6: Sheave, 7: Control device, 8-10: Suspension sheave, 11-12: Buffer, 13: Communication device, 14: Network, 15: Landing, 16: Guide rail, 17: Support device, 18: Bolt, 19: Base, 21: Adjusting counterweight, 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 platform, 53a: Cutout.

Claims

1. A method for moving a car, which is a method for moving the car downward in an elevator device, said elevator device comprising: The car and counterweight move within the hoistway; A buffer is positioned directly below the counterweight; Ropes, which suspend the car and the counterweight; and A traction machine, on which the aforementioned rope is wound. The elevator device also includes a support device with threaded holes. The buffer is disposed on the support device using the threaded hole. The method for moving the car includes: The first removal step involves removing the buffer. In the first moving step, after the first removal step, a jack is placed at the location where the buffer was previously placed, and the counterweight is lifted by the jack, causing the counterweight to move upward. In the first raising step, after the first moving step, a first raising platform is installed on the counterweight in a manner extending downward from the counterweight; and In the second moving step, after the first raising step, a jack is placed under the first raising platform. This jack lifts the first raising platform, causing the counterweight to move upwards. The third raising step involves, after the first removal step, installing a third raising platform at the location where the buffer was previously installed; and In the fourth moving step, after the third raising step, a jack is placed on the third raising platform, and the counterweight is moved upward by the jack. In the first removal step, the buffer is removed from the support device. In the third heightening process, the support plate is installed on the support device using the threaded hole, and the third heightening platform is installed on the support plate.

2. A method for moving a car, which is a method for moving the car downward in an elevator device, said elevator device comprising: The car and counterweight move within the hoistway; A buffer is positioned directly below the counterweight; Ropes, which suspend the car and the counterweight; and A traction machine, on which the aforementioned rope is wound. The elevator device also includes a support device with threaded holes. The buffer is disposed on the support device using the threaded hole. The method for moving the car includes: The first removal step involves removing the buffer. In the first raising step, a first raising platform is installed on the counterweight in a manner extending downwards from the counterweight; and The second moving step, following the first raising step, involves using jacks positioned at the location where the buffer was installed to lift the first raising platform, thereby moving the counterweight upwards. The third raising step involves, after the first removal step, installing a third raising platform at the location where the buffer was previously installed; and In the fourth moving step, after the third raising step, a jack is placed on the third raising platform, and the counterweight is moved upward by the jack. In the first removal step, the buffer is removed from the support device. In the third heightening process, the support plate is installed on the support device using the threaded hole, and the third heightening platform is installed on the support plate.

3. The method for moving the car according to claim 1 or 2, wherein, The method for moving the car further includes: In the second heightening step, after the second moving step, the second heightening platform is installed on the first heightening platform in a manner that extends downward from the first heightening platform; and In the third moving step, after the second raising step, a jack is placed under the second raising platform to lift the second raising platform, thereby moving the counterweight upward.

4. The method for moving the car according to claim 1 or 2, wherein, The method for moving the car also includes a second removal step performed before the first raising step. The counterweight has the following characteristics: The frame, which supports the adjustment counterweight; and A spacer is disposed in the frame opposite to the buffer. In the second removal step, the spacer is removed from the frame. In the first heightening process, the first heightening platform is installed on the frame in a manner that places the spacer previously configured.

5. The method for moving the car according to claim 1 or 2, wherein, The third heightening process is performed after the second moving process.

6. The method for moving the car according to claim 1 or 2, wherein, The method for moving the car further includes: In the fourth heightening step, after the fourth moving step, a fourth heightening platform is installed on the third heightening platform in a manner that extends upward from the third heightening platform; and The fifth moving step involves placing a jack on the fourth raising platform after the fourth raising step, using the jack to move the counterweight upwards.

7. A heightening device used in an elevator system to move the counterweight upwards using jacks in order to move the car downwards, the elevator system comprising: The car and the counterweight move within the shaft; A support device having a first threaded hole; A buffer, which is disposed in the support device using the first threaded hole and positioned directly below the counterweight; Ropes, which suspend the car and the counterweight; and A traction machine, on which the aforementioned rope is wound. The counterweight has the following characteristics: The frame has a second threaded hole and supports the adjusting counterweight; and A spacer, which is disposed in the frame using the second threaded hole and opposite the buffer. The height-increasing device includes: A first riser platform is capable of being mounted on the frame after the spacer has been removed using the second threaded hole; A support plate having a third threaded hole and capable of being mounted on the support device after the buffer has been removed, using the first threaded hole; A second lifting platform, which can be mounted to the support plate using the third threaded hole; and A third riser platform is capable of being installed on the first riser platform installed on the frame, and on the second riser platform installed on the support plate.

8. A method for moving a car, which is a method for moving the car downward in an elevator device, said elevator device comprising: The car and counterweight move within the hoistway; A buffer is positioned directly below the counterweight; Ropes that suspend the car and the counterweight; as well as A traction machine, on which the aforementioned rope is wound. The method for moving the car includes: The first removal step involves removing the buffer. In the first moving step, a first jack is placed below the counterweight, and the counterweight is lifted by the first jack, so that the counterweight moves upward. In the first raising step, after the first moving step, a first raising platform is arranged below the counterweight; In the second moving step, after the first raising step, a second jack is placed on the first raising platform, and the counterweight is lifted by the second jack, so that the counterweight moves upward. In the second raising step, after the second moving step, the first jack is removed from under the counterweight, and the upper surface of the second raising platform is positioned below the counterweight at a higher position than the upper surface of the first raising platform; and In the third moving step, after the second raising step, the first jack is placed on the second raising platform, and the first jack lifts the counterweight, causing the counterweight to move upward.

9. The method for moving a car according to claim 8, wherein, The method for moving the car further includes: In the third raising step, after the third moving step, the second jack is removed from the first raising platform, and the upper surface of the third raising platform is positioned on the first raising platform at a higher position than the upper surface of the second raising platform; and The fourth moving step involves placing the second jack on the third raising platform after the third raising step. The second jack lifts the counterweight, causing it to move upwards.

10. The method for moving a car according to claim 8, wherein, The method for moving the car further includes: In the fourth raising process, while the first jack is supporting the counterweight, the fourth raising platform is installed to extend downward from the counterweight. The fifth moving step is to move the counterweight upward by lifting the fourth lifting platform with the second jack positioned below the counterweight. In the fifth heightening step, after the fifth moving step, with the counterweight supported by the second jack, a fifth heightening platform is installed below the fourth heightening platform; and The sixth moving step is to lift the fifth lifting platform using the first jack after the fifth raising step, so that the counterweight moves upward.

11. A method for moving a car, which is a method for moving the car downward in an elevator device, said elevator device comprising: The car and counterweight move within the hoistway; A buffer is positioned directly below the counterweight; Ropes that suspend the car and the counterweight; as well as A traction machine, on which the aforementioned rope is wound. The method for moving the car includes: The first removal step involves removing the buffer. In the first moving step, a first jack is placed below the counterweight, and the counterweight is lifted by the first jack, so that the counterweight moves upward. In the first heightening process, after the first moving process, while the first jack is supporting the counterweight, the first heightening platform is installed to extend downward from the counterweight. In the second moving step, after the first raising step, the first raising platform is lifted by a second jack positioned below the counterweight, so that the counterweight moves upward. In the second raising step, after the second moving step, while the counterweight is supported by the second jack, a second raising platform is installed below the first raising platform; and In the third moving step, after the second raising step, the second raising platform is lifted by the first jack, causing the counterweight to move upward.

12. The method for moving the car according to any one of claims 8 to 11, wherein, The method for moving the car includes: In the seventh moving step, a third jack, shorter than the first jack, is placed below the counterweight. The counterweight is lifted by the third jack, causing the counterweight to move upward. In the configuration process, after the seventh moving step, a spacer is configured below the counterweight; In the eighth moving step, after the configuration step, a fourth jack shorter than the first jack is configured on the spacer, and the counterweight is lifted by the fourth jack, so that the counterweight moves upward. The second removal step involves removing the third jack after the eighth moving step; and The third removal process is performed after the first moving process and before the first raising process. The second removal process is performed before the first moving process. In the third removal process, the spacer and the fourth jack are removed.

Images