JP5595788B2 - How to renew an elevator - Google Patents

Description

  Embodiments of the present invention relate to an elevator renewal method in which a hydraulic elevator is renewed into a rope type elevator that lifts and lowers a ride car and a counterweight in a vine manner by a hoisting machine.

  Conventionally, hydraulic elevators that do not require a machine room above a hoistway have been used in low-rise apartments with a relatively small number of floors. However, due to environmental problems in recent years, the use of hydraulic elevators using oil has drastically decreased, and the majority of elevators are rope elevators. Therefore, even when an old hydraulic elevator is renewed, it is almost always changed to a machine room-less rope type elevator system (see, for example, Patent Document 1).

  Conventionally, the renewal method to change the hydraulic elevator to the latest machine roomless rope type elevator is to remove the existing car and all the equipment such as hydraulic jack, main rail, door, etc. The system was installed directly in the hoistway.

JP 2003-34474 A

  In the renewal method, all existing hydraulic elevators are removed and changed to a machine room-less rope type elevator system. Therefore, the elevator completely stops during the construction period (hereinafter referred to as a complete stop period) The customer was unavailable for a very long time. In such renewal of elevators, shortening the period of complete stoppage of elevators is the most important issue as requested by customers.

  One method for shortening the construction period of hydraulic elevator renewal is to leave a hydraulic jack that takes a very long time to remove and carry out. In this case, although the construction period is shortened, the space for installing the counterweight is limited due to the remaining hydraulic jack. In addition, in order to secure the necessary weight, the counterweight requires an outer shape of a certain degree or more, and securing the installation space for the guide rail becomes a problem. That is, in order to raise and lower a counterweight that is larger than a certain extent, the space between the pair of guide rails is also increased in order to secure the lifting space.

  A lateral space of the remaining hydraulic jack is used as a newly provided lifting space for the counterweight, and the width direction of the side space is set as an installation interval of the pair of guide rails for the counterweight. In this case, in order to ensure a large rail installation interval between the pair of guide rails, it is ideal to build one rail as close as possible to the remaining hydraulic jack. However, since the rails for hydraulic jacks are erected on both sides of the hydraulic jack, the rails for the counterweight cannot be built before the rails for the hydraulic jack are removed. That is, if the rail for the hydraulic jack is removed, it cannot be operated as a hydraulic elevator.

  In addition, the hoisting machine used for the new elevator after renewal and the machine beds on which the hoisting machine is placed are placed on the upper part of the guide rail for the counterweight, so before the guide rail for the counterweight is built Can not install these. As a result, as described above, the construction content during the complete stop period increases, and the complete stop period also becomes longer.

  For this reason, it is desirable that the complete stop period can be shortened by increasing the construction contents at the stage of using the existing hydraulic elevator until just before changing to the rope type elevator.

According to the elevator renewal method of the present invention, a hydraulic elevator that is driven up and down by a hydraulic jack standing in a space between one side surface of a car and an inner wall of the hoistway is installed in the hoistway so as to be raised and lowered. It is a renewal method to a rope type elevator that lifts and lowers the car in a slidable manner with a weight and a hoist installed at the upper part of this hoistway, and as a hydraulic elevator that drives the car up and down by the hydraulic jack while maintaining the operation, the supplies to be used after the renewal, and the first stage Keru Installing to a position not interfering with the operation of the hydraulic elevator, in a state that limits the movement of the top floor of the car, the hydraulic While maintaining the operation as an elevator, the second stage of performing the installation work on the top of the hoistway of the hoistway, and the hydraulic energy by the hydraulic jack A third stage in which the operation as a beta is stopped and a switching operation to a rope type elevator is carried out. In the second stage, the hoistway is installed at the upper part of the hoistway where the counterweight is installed. One of the pair of guide rails for the counterweight that is installed in the lateral space of the hydraulic jack after the renewal is installed at a position that does not hinder the operation of the hydraulic jack. The hoisting machine is supported by a temporary bracket provided between the rail and the hoistway inner wall, and the hoisting machine is installed on the machine bed.

  In this way, the work process of renewing the hydraulic elevator to the rope type elevator is divided in stages, and the existing hydraulic elevator is used until immediately before changing to the rope type elevator, thereby shortening the complete stop period. Can do.

It is a hoistway plane image figure of the hydraulic elevator before renewal in the renewal method of the elevator which concerns on one embodiment of this invention. It is a hoistway plane image figure after renewal in the renewal method of the elevator which concerns on one embodiment of this invention. It is a hoistway side image figure after renewal in the renewal method of the elevator which concerns on one embodiment of this invention. It is an image figure which attached the bracket for temporary installation in the 2nd step of the renewal method of the elevator which concerns on one embodiment of this invention to the hoistway wall. It is a top view explaining the relationship between one rail 19a and the bracket in FIG. It is a side view explaining the support structure of the machine bed and temporary bracket in FIG. FIG. 3 is an image view in which a temporary bracket 28 is attached to a rail bracket 30 in the second stage of the elevator renewal method according to the embodiment of the present invention. It is an image figure explaining the relationship between the temporary bracket 38, the rail bracket 30, and the other rail 19b for counterweight in the 2nd step of the renewal method of the elevator which concerns on embodiment of this invention. It is a top view which shows the coupling | bonding relationship with the temporary bracket 38 in FIG. 8, the rail bracket 30, and the other rail 19b. It is a side view which shows the relationship between the temporary bracket 38 in FIG. 8, and a machine bed. It is an image figure explaining the relationship between the bracket 48 for temporary installation and the rail bracket 30 in the 2nd step of the renewal method of the elevator which concerns on embodiment of this invention. It is an image figure explaining the relationship between the temporary bracket 48, the rail bracket 30, and the jack bolt 32 in the 2nd step of the renewal method of the elevator which concerns on embodiment of this invention. FIG. 13 is an image of a modification in which only the jack bolt 32 in FIG. 12 is used.

  Embodiments of an elevator renewal method according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan image view of a hoistway of a hydraulic elevator before renewal. In FIG. 1, a car 12 is installed in a hoistway 11 so that it can be raised and lowered by a guide rail 13. In a space between one side surface (the rear surface in FIG. 1) of the car 12 and the inner wall of the hoistway 11, a hydraulic jack 14 that is operated by hydraulic pressure is provided upright. The hydraulic jack 14 has a plunger that moves up and down by hydraulic pressure, and a pulley 15 is provided at the tip of the plunger. Although not shown, a rope is wound around the pulley 15. One end of the rope is connected to a rope hitch 12 a provided at the center in the width direction of the lower portion of the car 12, and the other end is a lower base body of the hydraulic jack 14. Connected to the department. Accordingly, when the plunger of the hydraulic jack 14 is raised, the end of the rope wound around the pulley 15 at the tip is also raised, and the car 12 is pulled up and raised.

  Although the hydraulic jack 14 is installed on the back side of the car 12 in FIG. 1, it may be installed on the side surface side. On both sides of the hydraulic jack 14, hydraulic jack rails 16 are installed to guide and support the raising and lowering of the plunger and the pulley 15 when the hydraulic jack 14 is operated. These structures are the same when the hydraulic jack 14 is provided on the side surface of the car 12.

  FIG. 2 is a schematic plan view of the hoistway 11 after the hydraulic elevator is renewed into a rope type while leaving the hydraulic jack 14 that takes a long time to be removed. In FIG. 2, a counterweight 18 and a pair of guide rails 19 (comprising rails 19a and 19b) for elevating and lowering the counterweight 18 are installed in an empty space on the side of the hydraulic jack 14, and upper portions (hatching portions) thereof. A machine bed for supporting a hoisting machine to be described later is provided.

FIG. 3 is an image diagram showing the right side surface of the hoistway 11 after the renewal shown in FIG. However, the upper part of FIG. 3 (machine bed portion shown by hatching in FIG. 2) is a view seen from the front (lower side in the figure) of FIG. Therefore, in FIG. 3, the machine bed 27 on which the hoisting machine 26 is mounted is installed on a pair of left and right rails 19a and 19b disposed on the side of the hydraulic jack 14 shown in FIG.

  A method for renewing the hydraulic elevator shown in FIG. 1 to the rope type elevator shown in FIGS. 2 and 3 will be briefly described below.

  In this renewal method, a car 12 installed in a hoistway 11 shown in FIG. 1 so as to be able to be raised and lowered by a guide rail 13 is connected to one side surface (rear face in the figure) of the car 12 and the inner wall of the hoistway 11. As shown in FIGS. 2 and 3, a hydraulic elevator that is driven up and down by a hydraulic jack 14 erected in the space is a fishing that is installed in the hoistway 11 so that it can be moved up and down with the hydraulic jack 14 remaining. This is a method for renewing a rope elevator that raises and lowers the car 12 in a slidable manner by means of a weight 18 and a hoisting machine 26 installed at the top of the hoistway 11, and is roughly divided into the following three stages. Is done.

  In the first stage, while maintaining the operation as a hydraulic elevator in which the car 12 is driven up and down by the hydraulic jack 14, articles used after the renewal, for example, the counterweight 18 and its guide rail 19 are used as the hydraulic elevator. Installation and replacement to a location where there is no hindrance to operation. In the second stage, the operation of the hoisting machine 26 is installed on the top of the hoistway 11 while maintaining the operation as a hydraulic elevator in a state where the movement of the car 12 to the top floor is restricted. . In the third stage, the operation as a hydraulic elevator by the hydraulic jack 14 is stopped, and the switching operation to the rope type elevator is performed.

  Among these, in the second stage, a machine bed 27 on which the hoisting machine 26 is installed is installed on the upper part of the hoistway 11 on which the counterweight 18 is installed, and the hoisting machine 26 is placed on the machine bed 27. Place. Of the pair of guide rails 19 for the counterweight 18 installed in the lateral space of the hydraulic jack 14 when installing the machine bed 27, as shown in FIG. 4, there is no problem in the operation of the hydraulic jack 14. The lower surface of the machine bed 27 is supported by one rail 19 a installed at the right position and a temporary bracket 28 provided between the inner wall of the hoistway 11.

  A bracket 29 is provided between the upper end of the rail 19 a that supports the machine bed 27 and the lower surface of the machine bed 27. The bracket 29 includes a horizontal portion 29a positioned between the tip of the rail 19a and the lower surface of the machine bed 27, a vertical portion 29b joined to the back surface of the rail 19a having a T-section as shown in FIG. It consists of a triangular reinforcing portion 29c provided integrally on both sides of the horizontal portion 29a and the vertical portion 29b, and is attached to the upper portion of the rail 19a by bolting or the like.

  Here, as shown in FIG. 4, there are hydraulic jack rails 16 on both sides of the hydraulic jack 14, and if this is removed in the second stage, the operation of the hydraulic jack 14 will be hindered, resulting in a hydraulic elevator. It becomes impossible to operate. In the second stage, it is necessary to maintain the operation as a hydraulic elevator. In this stage, the hydraulic jack rail 16 is left as it is, and therefore the other rail 19b shown in FIG. 3 cannot be installed. Therefore, a temporary bracket 28 is used instead of the other rail 19b, and the lower surface of the machine bed 27 is supported together with the rail 19a as described above.

  As shown in FIG. 6, the temporary bracket 28 that supports the machine bed 27 in the second stage described above is directly fixed to the hoistway inner wall 11 a near the machine bed 27 with anchor bolts. In addition, the rail 19a for the counterweight opposite to the hydraulic jack 14 can be installed in advance because there is no problem in the operation of the hydraulic elevator as described above. Therefore, the machine bed can be supported by the one rail 19a and the temporary bracket 28, and the hoisting machine 26 can be placed thereon.

  In this manner, the hoisting machine 26 and the machine bed 27 can be installed on the upper part of the hoistway 11 which requires labor for the work while maintaining the operation as a hydraulic elevator in the second stage described above. Therefore, the complete stop period of the elevator can be shortened.

  In the third stage, since the operation of the hydraulic elevator is completely stopped, the hydraulic jack rails 16 provided on both sides of the hydraulic jack 14 can be removed. For this reason, since the other rail 19b for the counterweight can be installed near the hydraulic jack 14, the machine bed 27 is supported by the pair of counterweight rails 19a, 19b as shown in FIG.

  4 and 6 show a structure decree in which the temporary bracket 28 is directly fixed to the hoistway inner wall 11a with an anchor bolt, but it may be configured to be fixed to the rail bracket 30 as shown in FIG. Good. The rail bracket 30 is for attaching and supporting the other rail 19b for the counterweight installed in the third stage, and is attached to the hoistway wall surface 11a in the second stage. That is, a steel material having an L-shaped cross section is used as the rail bracket 30 and the rail bracket 30 is integrally attached so that its longitudinal direction forms a right angle with the hoistway inner wall surface facing the front of FIG. In the second stage, as shown in FIG. 6, the lower part of the temporary bracket 28 that supports the lower left side of the machine bed 27 in the figure is fixed to the rail bracket 30 by bolting or the like.

  Even with such a configuration, the hoisting machine 26 and the machine bed 27 are installed on the upper part of the hoistway 11 that requires labor, while maintaining the operation as a hydraulic elevator in the second stage described above. Therefore, the complete stop period of the elevator can be shortened.

  Next, the embodiment shown in FIGS. 8 to 10 will be described. In this example, in the second stage, the temporary bracket 38 for supporting the machine bed 27 is attached to the rail bracket 30 fixed to the inner wall of the hoistway near the machine bed 27 as in FIG. As described above, the rail bracket 30 supports the other rail (the rail on the left side in the figure) 19b of the pair of counterweights 19 for the counterweight that is installed near the hydraulic jack 14 in the third stage. As described above, the rail 19b is installed near the hydraulic jack in the third stage, is attached to the rail bracket 30, and supports the machine bed 27. In this third stage, the temporary bracket 38 supporting the machine bed 27 in the second stage described above is integrated with the rail 19b as it is, as shown in FIGS. 8 and 9, without being removed from the rail bracket 30. To join.

  Here, as shown in FIG. 10, the temporary bracket 38 is formed by integrally joining two members 38A and 38B. The member 38A has the same structure as the bracket 29 attached to the upper end portion of one rail 19a described with reference to FIGS. 4 and 5, and a horizontal portion positioned between the tip of the rail 19b and the lower surface of the machine bracket 27, It consists of a vertical portion joined to the back surface of the rail 19b having a T-section and a triangular reinforcing portion integrally provided on both sides of the horizontal portion and the vertical portion, and is attached to the upper portion of the rail 19b by bolting or the like. The member 38B includes a vertical portion coupled back to back with the vertical portion of the member 38A, a horizontal portion placed on a horizontal portion of the L-shaped rail bracket 30, and integrally on both sides of the horizontal portion and the vertical portion. It consists of a triangular reinforcing part provided.

  Even with such a configuration, the hoisting machine 26 and the machine bed 27 are installed on the upper part of the hoistway 11 that requires labor, while maintaining the operation as a hydraulic elevator in the second stage described above. Therefore, the complete stop period of the elevator can be shortened. In the third stage, the other rail 19b for the counterweight can be installed without removing the temporary bracket 38, and the working time can be shortened.

  Next, the embodiment shown in FIG. 11 will be described. In this embodiment, as a temporary bracket 48 for supporting the machine bed 27 in the second stage, the basic structure includes members 48A and 48B similar to the two members 38A and 38B shown in FIG. The member 48B is configured so that the portion 48B1 connected to the rail bracket 30 can be separated from the main body portion 48B. That is, the member 48A, like the member 38A, has the same structure as the bracket 29 attached to the upper end portion of one rail 19a, and a horizontal portion located between the tip of the rail 19b and the lower surface of the machine bracket 27, It consists of a vertical portion joined to the back surface of the rail 19b having a T-section and a triangular reinforcing portion integrally provided on both sides of the horizontal portion and the vertical portion, and is attached to the upper portion of the rail 19b by bolting or the like. Similarly to the member 38B, the member 48B is also provided integrally with the vertical portion of the member 48A that is coupled back to back, a horizontal portion formed at the lower end thereof, and both sides of the horizontal portion and the vertical portion. Although it is composed of a triangular reinforcing portion, the length of the vertical portion is shorter than that of the member 38B, and the lower surface of the horizontal portion is configured not to reach the horizontal portion of the L-shaped rail bracket 30. For this reason, the connecting portion 48B1 to the rail bracket 30 is detachably provided between the lower surface of the horizontal portion of the member 48B, the horizontal portion to be placed, and the horizontal portion of the rail bracket 30. In other words, the temporary bracket 48 is configured to be separable into a part composed of a member 48A connected to the machine bed 27 and a member 48B integrally connected thereto, and a part 48B1 connected to the rail bracket 30. Yes.

  In the second stage, as shown in FIG. 11, the temporary bracket 48 includes a portion (consisting of a member 48 </ b> A and a member 48 </ b> B) coupled to the machine bed 27 and a portion 48 </ b> B <b> 1 coupled to the rail bracket 30. The machine bed 27 is connected to the rail bracket 30 via a temporary bracket 48.

  In the third stage, since the other rail 19b for the counterweight is installed near the hydraulic jack 14 in order to completely stop the operation as the hydraulic elevator, the portion connected to the machine bed 27 of the temporary bracket 48 ( 48A and 48B) is coupled to the other installed rail 19b, and the weight of the machine bed 27 and the hoisting machine 26 placed on the machine bed 27, and further, as the operation as a rope type elevator The weight of the generated car 12 and the counterweight 18 is configured to be supported by a pair of guide rails 19a and 19b for the counterweight.

  At this time, the portion 48B1 of the temporary bracket 48 connected to the rail bracket 30 is separated and removed from the rail bracket 30. For this reason, after the third stage, the rail bracket 30 is used only for the original holding function of the rail 19b, and a large load including the weight of the car 12 and the counterweight 18 in the third stage and later is applied to the rail bracket 30. There is no such thing.

  Next, the embodiment shown in FIG. 12 will be described. In this embodiment, the same one as the temporary bracket 48 shown in FIG. 11 is used, and a portion connected to the machine bed 27 (consisting of members 48A and 48B) and a portion 48B1 connected to the rail bracket 30 are used. It consists of In the second stage, the portion connected to the machine bed (consisting of the members 48A and 48B) and the portion 48B1 connected to the rail bracket 30 are integrally connected. However, the rail bracket 30 can be adjusted in the vertical direction with the jack bolt 32 provided on the rail bracket 30 so that the portion of the temporary bracket 48 connected to the machine bed 27 (consisting of the members 48A and 48B) can be adjusted in the vertical direction. Attached to.

  As described above, by attaching the jack port 32, the operation of removing the portion 48B1 becomes easy, and when the rail 11b is installed in the third stage, the portion connected to the machine bed 27 of the temporary bracket 48 by the jack bolt 32 (Consisting of the members 48A and 48B) can be lifted, and the work of attaching the tip of the rail 11b to the member 48a of the temporary bracket 48 is facilitated.

  FIG. 13 shows a modification in which the portion 48B1 in FIG. That is, the temporary bracket 48 for supporting the machine bed 27 is configured only by a portion (consisting of the members 48A and 48B) connected to the machine bed 27, and the portion consisting of the members 48A and 48B is attached to the rail bracket 30. It has a jack bolt 32 to be connected. The tip of the jack bolt 32 is screwed into the horizontal portion of the member 48B. In the second stage, the portion consisting of the member 48A and the member 48B connected to the machine bed is connected to the rail bracket 30 by the jack bolt 32. It becomes the structure connected so that height adjustment is possible.

  Even in such a configuration, when the rail 11b is installed in the third stage, the jack bolt 32 can lift the portion of the temporary bracket 48 composed of the members 48A and 48B connected to the machine bed 27, and the rail 11b. This facilitates the work of attaching the leading end of the first member to the member 48A of the temporary bracket 48. Further, after the third stage, the rail bracket 30 is used only for the original holding function of the rail 19b, and a large load including the weight of the car 12 and the counterweight 18 in the third stage and after is applied to the mounted rail 11b. Therefore, a large load is not applied to the rail bracket 30.

  As described above in detail, in the embodiment of the present invention, in the method of renewing a hydraulic elevator to a machine roomless type rope elevator system, an article used after renewal while maintaining operation as a hydraulic elevator. While maintaining the operation as a hydraulic elevator with the first stage of mounting and exchanging at a position where there is no hindrance to the operation of the hydraulic elevator, while restricting the movement to the top floor of the ride, A second stage for carrying out the installation work on the top of the hoistway of the hoisting machine, and a third stage for carrying out the work for switching to a rope type elevator by stopping the operation as a hydraulic elevator with a hydraulic jack. The hydraulic jacks that are executed sequentially and that take time to remove and carry out remain. And in the operation | work which installs the hoisting machine in the above-mentioned 2nd stage in the top part in a hoistway, it can temporarily set in the temporary placement state, and can shorten the complete stop period of a 3rd stage. .

  Further, by taking the temporary bracket for temporary placement from the hoistway wall, it can be installed even on the hoistway wall made of concrete wood, and the degree of freedom of the mounting location is further increased.

  Further, if the temporary bracket for temporary placement is attached to the rail bracket for the counterweight, it is not necessary to finally remove the temporary bracket.

  In addition, by making it possible to separate the temporary bracket and the rail bracket for the counterweight, the rail bracket that allows only a horizontal load can be configured so as not to be affected by the hoisting machine and the car load.

  Further, when the jack bolt is provided between the temporary bracket and the rail bracket, the hoisting machine and the machine bed can be lifted when the rail is finally attached, and the installation can be facilitated.

DESCRIPTION OF SYMBOLS 11 ... Hoistway 11a ... Hoistway wall 12 ... Ride car 14 ... Hydraulic jack 18 ... Counterweight 19 ... Pair of guide rails 19a for counterweight 19a ... One rail 19b of the position which does not interfere with driving | operation of a hydraulic jack ... the other rail at a position that hinders the operation of the hydraulic jack 26 ... the hoisting machine 27 ... the machine beds 28,38,48 ... the temporary brackets,
30 ... Rail bracket 32 ... Jack bolt

Claims (7)

In the hoistway, a hydraulic elevator that is driven up and down by a hydraulic jack standing in the space between one side of the car and the inner wall of the hoistway, It is a renewal method to a rope type elevator that lifts and lowers the car in a skate manner with a hoist installed at the upper part of the hoistway,
While maintaining the operation of a hydraulic elevator for vertically driving the cab by the hydraulic jack, the supplies to be used after the renewal, and the first stage Keru Installing to the trouble-free position in the operation of the hydraulic elevator,
A second stage of performing installation work on the top of the hoistway of the hoisting machine while maintaining operation as the hydraulic elevator in a state where movement of the car to the top floor is limited ;
A third stage in which operation as a hydraulic elevator by the hydraulic jack is stopped and switching to a rope type elevator is performed,
In the second stage, the machine bed on which the hoisting machine is installed on the upper part of the hoistway where the counterweight is installed, and the counterweight installed on the side space of the hydraulic jack after the renewal Of the pair of guide rails is supported by one rail installed at a position where there is no hindrance to the operation of the hydraulic jack, and a temporary bracket provided between the hoistway inner wall and on the machine bed An elevator renewal method characterized by installing a hoisting machine. The machine bed is
In the second stage, supported by the one rail of the pair of guide rails for the counterweight and a temporary bracket fixed directly to the inner wall of the hoistway near the machine bed,
The third stage is supported by the one rail of the pair of guide rails for the counterweight and the other rail of the same pair of guide rails installed near the hydraulic jack. The elevator renewal method according to claim 1. In the second stage, a temporary bracket for supporting the machine bed is attached to a rail bracket fixed to a hoistway inner wall near the machine bed,
The elevator renewal method according to claim 1, wherein, in the third stage, the other rail of the pair of counterweight guide rails installed near the hydraulic jack is attached to the rail bracket. In the second stage, a temporary bracket for supporting the machine bed is attached to a rail bracket fixed to a hoistway inner wall near the machine bed,
In the third stage, the other rail of the pair of counterweights for the counterweight installed near the hydraulic jack is attached to the rail bracket, and a temporary bracket for supporting the machine bed is attached to the other guide rail. The elevator renewal method according to claim 1, wherein the renewal method is performed. The temporary bracket for supporting the machine bed is separable into a part connected to the machine bed and a part connected to the rail bracket,
In the second stage, the portion connected to the machine bed and the portion connected to the rail bracket are integrally connected,
In the third stage, a portion of the temporary bracket connected to the machine bed is coupled to the other rail of the pair of counterweights installed near the hydraulic jack, and the rail bracket of the temporary bracket The method for renewing an elevator according to claim 3, wherein a portion connected to the rail bracket is separated and removed from the rail bracket. The temporary bracket for supporting the machine bed is separable into a part connected to the machine bed and a part connected to the rail bracket,
In the second stage, the portion connected to the machine bed and the portion connected to the rail bracket are integrally connected, and a jack bolt provided on the rail bracket is used to attach the temporary bracket to the machine bed. The elevator renewal method according to claim 3 or 5, wherein the connecting portion is attached to the rail bracket in a state in which the position can be adjusted with respect to the vertical direction. The temporary bracket for supporting the machine bed has a portion connected to the machine bed, and a jack bolt that connects a portion connected to the machine bed to the rail bracket.
In the second stage, the portion connected to the machine bed is connected to the rail bracket by the jack bolt so that the height can be adjusted,
In the third step, the portion of the temporary bracket connected to the machine bed is adjusted to the appropriate height and coupled to the other rail of the pair of counterweight guide rails installed near the hydraulic jack. The elevator renewal method according to claim 3.

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