JP2018070362A - Elevator installation method - Google Patents

Abstract

Provided is an elevator installation method that does not require a fixed scaffold when mounting a guide rail for guiding the elevation of an installation work floor to a hoistway, thereby reducing installation costs. A step of assembling a pit base at the bottom of a hoistway where a car of an elevator moves up and down, and a lowermost guide rail is erected at a predetermined position on the pit base opposite to a space where the car moves up and down. And fixing the lower part of the lowermost guide rail to the pit base, fixing the lowermost guide rail to the hoistway with the first rail bracket using the hoistway bottom as a scaffold, and fixing and supporting the lowermost guide rail. After the step of assembling the work floor for installation and the step of arranging the pit base, and before the step of assembling the work floor for installation, the step of fixing the pit base to the hoistway bottom was assembled. Elevating the installation work floor. [Selection diagram] Fig. 1

Description

  The present invention relates to an elevator installation method, and more particularly to an elevator guide rail installation method.

  In conventional elevator installation work, a lifting rope driven by a lifting machine provided at the top of the hoistway is fixed to an installation work floor disposed in the hoistway, and the lifting machine is driven via the lifting rope. Then, the installation work floor is raised and lowered, and an operator on the installation work floor performs the installation work of the equipment in the hoistway (see Patent Document 1).

JP 2005-162416 A

  By the way, in the conventional elevator installation method, when a guide rail for guiding the lifting of the work floor for installation is erected, a fixed scaffolding is temporarily installed on the bottom (floor surface) of the hoistway, and the guide is used by using the fixed scaffolding. The work which fixes a rail to a hoistway is performed. As described above, when a fixed scaffold is temporarily installed in the hoistway, there is a problem that the amount of work related to the transportation and installation of equipment increases and the installation cost increases.

  Accordingly, an object of the present invention is to provide an elevator installation method that eliminates the need for a fixed scaffold and reduces the installation cost when a guide rail that guides the elevation of the installation work floor is attached to the hoistway. To do.

  In order to solve the above-described problems and achieve the object of the present invention, an elevator installation method according to the present invention includes a step of assembling a pit base at the bottom of a hoistway where an elevator car moves up and down, and a car on the pit base. The lowermost guide rail is erected at a predetermined position facing the space in which the lower and upper walls are lifted, and the lower portion of the lowermost guide rail is fixed to the pit base. After the process of fixing to the hoistway with one rail bracket, the process of assembling the installation work floor while being fixedly supported by the lowermost guide rail, and the process of arranging the pit base, the work floor for installation is assembled Before the process, the process includes a process of fixing the pit base to the bottom of the hoistway and a process of raising the assembled installation work floor.

  According to the present invention, when installing the guide rail, it is not necessary to assemble a fixed scaffold at the bottom of the hoistway, so that the installation cost can be reduced.

It is a flowchart which shows the installation method of the elevator which concerns on one Embodiment of this invention. It is a figure which shows the state which completed the attachment process of the lowermost guide rail in the elevator installation method which concerns on one Embodiment of this invention, and the assembly process of the work floor for installation. FIG. 3A is a configuration diagram when the pit base applied to the elevator installation method according to one embodiment of the present invention is viewed from one side, and FIG. 3B is a configuration diagram when the pit base is viewed from the top surface. FIG. 3C is a configuration diagram when viewed from the other side of the pit base. It is the perspective view which showed schematically the guide rail applied to the installation method of the elevator which concerns on one Embodiment of this invention. It is a figure which shows the 2nd step rail bracket attachment process of the lowest guide rail in the elevator installation method which concerns on one Embodiment of this invention. It is a figure which shows the attachment process of the guide rail of the intermediate part in the elevator installation method which concerns on one Embodiment of this invention. It is a figure which shows the attachment process of the uppermost guide rail in the elevator installation method which concerns on one Embodiment of this invention.

  Hereinafter, an example of an elevator installation method according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following examples.

  FIG. 1 is a flowchart showing a method for installing an elevator 1 according to an embodiment of the present invention, and FIG. 2 shows how to install a lowermost guide rail 11 in the method for installing an elevator 1 according to an embodiment of the present invention. It is sectional drawing of the hoistway 2 which shows the state which finished the process and the assembly process of the work floor 14 for installation. This embodiment demonstrates the example which assembles the guide rails 11, 12, and 13 in order in the hoistway 2 of the elevator 1, as shown in FIG. In the following description, when the guide rails 11, 12, and 13 are distinguished from each other, they are referred to as a lowermost guide rail 11, an intermediate guide rail 12, and an uppermost guide rail 13, respectively.

  First, in the elevator 1 installation method according to the present embodiment, prior to the installation work of the lowermost guide rail 11, an assembly process of the top stage 3 and an installation process of the lifting machines 5 and 6 are performed (step S1). As shown in FIG. 2, the top stage 3 is a work floor for installing a rail lifting machine 5 and a work floor lifting machine 6 to be described later on the top of a hoistway 2 in which a car of the elevator 1 moves up and down. This is a jumping-out scaffold built up from the landing on the top floor in the hoistway 2. The top stage 3 is provided so as to project into the hoistway 2 so that the operator X can install the rail hoist 5 and the work floor hoist 6 at the top of the hoistway 2.

  After assembling the top stage 3, the worker X installs the suspension beam 4 that can suspend the rail lifting machine 5 and the work floor lifting machine 6 on the top of the hoistway 2 using the top stage 3 as a scaffold. Then, a rail lifting machine 5 for lifting the guide rails 11, 12, and 13 and a work floor lifting machine 6 for raising and lowering an installation work floor 14 to be described later are installed on the suspension beam 4. The rail lifting machine 5 and the work floor lifting machine 6 are attached to the suspension beam 4 by hooks 5a and 6a, respectively. The rail hoist 5 and the work floor hoist 6 hold hoisting ropes 7 and 8, respectively.

  The rail lifting machine 5 and the work floor lifting machine 6 are connected to a power supply cable (not shown) drawn from the building power source, and the lifting ropes 7 and 8 are suspended and suspended. Further, a guide rail holding part 9 is provided at the tip of the lifting rope 7 of the rail lifting machine 5. In the present embodiment, after the rail lifting machine 5 and the work floor lifting machine 6 are attached, the top stage 3 is removed at a predetermined timing.

  Next, an assembly process of the pit base 10, an arrangement process of the lowermost guide rail 11, and a fixing process of the first rail bracket 16 (hereinafter, the lowermost rail bracket 16) are sequentially performed (step S2). 3A is a configuration diagram when the pit base 10 applied to the elevator 1 installation method according to the present embodiment is viewed from one side, and FIG. 3B is a configuration diagram when the pit base 10 is viewed from the top surface. FIG. 3C is a configuration diagram when viewed from the other side of the pit base 10.

  As shown in FIGS. 3A and 3B, the pit base 10 used in the present embodiment includes a pit base main body 18 formed of an elongated beam-like member, and bolts on both end surfaces along the longitudinal direction of the pit base main body 18. And two guide rail receiving portions 19 fixed at 20. The pit base body 18 is a member that defines the interval between the lowermost guide rails 11 to be erected, and is configured with a desired length for each elevator. In the present embodiment, the pit base main body 18 is not shown in the figure, but the cross section along the short direction is configured by a U-shaped member, and both ends in the longitudinal direction are on both sides in the short direction. An overhanging portion 18a is formed which is formed so as to overhang and is formed with a bolt hole used when fastening the bolt with the guide rail receiving portion 19.

  The guide rail receiving portion 19 includes a flat portion 19a having a horizontal surface on which the lowermost guide rail 11 is installed, an outer bent portion 19b and a pit base main body side bent portion 19c extending upward with the flat portion 19a interposed therebetween. The pit base body side bent portion 19c is provided with a bolt hole at a position corresponding to the bolt hole provided in the projecting portion 18a of the pit base body 18. The outer bent portion 19b is bent to a height at which the bottom portion of the lowermost guide rail 11 to be installed later can be fixed to the outer bent portion 19b by the rail clip 23. Also in the outer side bending part 19b, the bolt hole is provided in the position corresponding to the bolt hole provided in the rail clip 23 for fixing the lowermost guide rail 11.

  The pit base 10 is guided to both end surfaces in the longitudinal direction of the pit base body 18 by fastening the overhanging portion 18 a of the pit base body 18 and the pit base side bent portion 19 c of the guide rail receiving portion 19 with bolts 20. The rail receiving part 19 is fixed. In this state, the pit base 10 is carried into the hoistway 2 and assembled at a predetermined position on the hoistway bottom 31.

  After assembling the pit base 10 on the hoistway bottom 31, the operator stands on the guide rail receiving portion 19 while lifting the lowermost guide rail 11 with the rail hoist 5. The lowermost guide rail 11 is held by a guide rail holding portion 9 provided at the tip of the lifting rope 7 of the rail hoist 5 and is arranged on the flat portion 19a of the guide rail receiving portion 19 while being lifted in the vertical direction. The

  FIG. 4 is a schematic perspective view of the lowermost guide rail 11 used in the present embodiment. As shown in FIG. 4, the lowermost guide rail 11 of the present embodiment has a flange portion 11b to which a rail bracket 16 (to be described later) is attached and a work floor 14 for installation (to be described later) and a passenger car. A cross section composed of a guide portion 11c that guides raising and lowering is constituted by a T-shaped member. At the upper end of the lowermost guide rail 11, a joint plate 11a fastened with a bolt 26 is provided on the back side of the flange portion 11b. The joint plate 11a is provided with a bolt hole 25 for fastening a bolt with a guide rail (in this embodiment, the intermediate guide rail 12) arranged on the upper side. The lowermost guide rail 11 having such a configuration is installed on the guide rail receiving portion 19 so that the joint plate 11a comes to the upper end, and the guide portion 11c of the flange portion 11b of the lowermost guide rail 11 is provided. It is installed so that the back surface on the opposite side to the side where it is and the outer bent portion 19b of the guide rail receiving portion 19 are in contact with each other.

  The present embodiment is an example in which the three-stage guide rails 11, 12, and 13 are attached. When installing the guide rail, in addition to the lowermost guide rail 11, the middle (second stage) guide rail 12 and the uppermost part are provided. (Third stage) A guide rail 13 is carried into the hoistway 2. The guide rails 12 and 13 are also made of a member having a T-shaped cross section like the lowermost guide rail 11, but the intermediate portion guide rail 12 has a joint plate 12 a at the same upper end as the lowermost guide rail 11. The seam plate is not attached to the uppermost guide rail 13.

  After the lowermost guide rail 11 is erected on the guide rail receiving portion 19, as shown in FIGS. 3A and 3B, the lower portion of the lowermost guide rail 11 and the guide rail receiving portion 19 are connected using the rail clip 23. Fix it. The lowermost guide rail 11 is fixed to the guide rail receiving portion 19 by sandwiching the flange portion 11b of the lowermost guide rail 11 and the outer bent portion 19b of the guide rail receiving portion 19 with a rail clip 23 and fastening with a bolt 24. The

  Next, as shown in FIG. 2, the worker X fixes the lowermost guide rail 11 to the inner wall of the hoistway 2 with the lowermost rail bracket 16 using the hoistway bottom 31 as a scaffold. The lowermost rail bracket 16 is fixed to a fastener (not shown) installed on a wall surface of the hoistway 2 or a beam of a building with a bolt or the like, for example. The position of the lowermost rail bracket 16 differs depending on the specifications of the elevator and the specifications of the guide rail, but may be any position where an operator can attach the hoistway bottom 31 as a scaffold, for example, about 800 mm from the hoistway bottom 31. Mounted at height.

  Next, a fixing process (step S3) of the pit base 10 is performed. The pit base 10 is fixed to the hoistway bottom 31 by fixing the guide rail receiving part 19 to the hoistway bottom 31 with a rail clip 21 and an anchor bolt 22 as shown in FIGS. 3A, 3B and 3C. . In the present embodiment, as shown in FIG. 3B, the pit base 10 is fixed to the hoistway bottom 31 at two locations sandwiching the lowermost guide rail 11 with respect to one guide rail receiving portion 19. The rail clip 21 for fixing the guide rail receiving part 19 to the hoistway bottom part 31 is composed of a member extending from the flat part 19 a of the guide rail receiving part 19 to the hoistway bottom part 31. Then, the guide rail receiving portion 19 is fixed to the hoistway bottom portion 31 by sandwiching the flat portion 19a of the guide rail receiving portion 19 with the rail clip 21 and fixing the rail clip 23 to the hoistway bottom portion 31 with the anchor bolts 22. In addition, the pit base 10 is fixed to the hoistway bottom 31.

  The width of the two anchor bolts 22 provided across the lowermost guide rail 11 only needs to be larger than the width of the flange portion 11b of the lowermost guide rail 11, and the moment load accompanying the raising and lowering of the installation work floor 14 described later is applied. The width may be any width that can be fixed to the guide rail receiving portion 19 to such an extent that it can be supported. Further, the depth, material, and the like of the anchor bolt 22 are variously selected depending on the specifications of the elevator. As the anchor bolt 22, it is preferable to use a bolt having water resistance. Examples of the anchor bolt 22 having water resistance include a chemical anchor. By using the anchor bolt 22 having water resistance, it is possible to prevent the groundwater and the like from overflowing from the floor of the hoistway bottom 31.

  The guide rail receiving portion 19 is fixed to the hoistway bottom 31 by the anchor bolts 22, so that both end portions in the longitudinal direction of the pit base 10 are fixed to the hoistway bottom 31. Through the steps so far, the lowermost guide rail 11 is fixed in the hoistway 2 by the anchor bolt 22 and the lowermost rail bracket 16.

  Next, an assembly process (step S4) of the installation work floor 14 is performed. The worker X installs a work floor employee 15 serving as a stopper for the installation work floor 14 at a middle position of the lowermost guide rail 11 and above the lowermost landing with the hoistway bottom 31 as a foothold. To do. The work floor receiver 15 is composed of a member (for example, an angle) capable of supporting and fixing the work floor 14 for installation, and is bolted to the lowermost guide rail 11 although not shown.

  Then, after the work floor supporter 15 is installed, the installation work floor 14 is assembled so as to engage with the lowermost guide rail 11 while being supported by the work floor supporter 15. The installation work floor 14 of the present embodiment is loaded with a car floor 14a that serves as a scaffold for the worker X, a handrail 14b for ensuring the safety of the worker X, and the worker X on the upper surface side of the car floor 14a. A protective ceiling 14c provided on the upper side of the space to be used.

  In this embodiment, since the work floor employee 15 is attached above the lowermost landing, the installation work floor 14 is also assembled above the lowermost landing. Thereby, the worker X can get on the installation work floor 14 and can enter the hoistway bottom 31 through the gap between the lowermost landing and the installation work floor 14. Thereby, workability | operativity improves.

  After assembling the installation work floor 14, the installation work floor 14 and the lifting rope 8 driven by the work floor lifting machine 6 are connected as shown in FIG. 2. Thereby, the installation work floor 14 can be raised and lowered while being guided by the lowermost guide rail 11 in the hoistway 2. Further, after the installation work floor 14 is assembled and connected to the lifting rope 7 of the work floor lifting machine 6, the work floor worker 15 may be removed.

  Next, the ascending process of the installation work floor 14 and the attaching process of the second rail bracket 27 (hereinafter, second-stage rail bracket 27) are sequentially performed (step S5). FIG. 5 is a diagram illustrating a process of attaching the second-stage rail bracket 27 of the lowermost guide rail 11 in the elevator 1 installation method according to the embodiment of the present invention. In the raising / lowering process of the installation work floor 14, the work floor lifting machine 6 is driven to raise the lifting rope 8 to raise the installation work floor 14. At this time, the work vehicle X on the work floor 14 is raised to a position where the work vehicle X reaches the position where the second rail bracket 27 of the lowermost guide rail 11 is attached. When the installation work floor 14 is raised to a desired position, the worker X uses the installation work floor 14 as a foothold, and the second stage rail bracket 27 is used to connect the upper part of the lowermost guide rail 11 to the inner wall of the hoistway 2. Work to fix to. In the present embodiment, the second-stage rail bracket 27 is attached above the center of the lowermost guide rail 11.

  In the present embodiment, in the step before raising the installation work floor 14, the lowermost guide rail 11 is fixed to the guide rail receiving portion 19 fixed to the hoistway bottom 31, and the lowermost rail bracket 16 is used. It is fixed to the inner wall of the hoistway 2. Therefore, at the stage where the installation work floor 14 is raised, the lowermost guide rail 11 is fixed to the hoistway at two points. Thereby, when the work floor 14 for installation is guided to the lowermost guide rail 11 and raised, the moment load acting on the lowermost guide rail 11 is supported by the guide rail receiving portion 19 and the lowermost rail bracket 16. It is possible. Thereby, the work floor 14 for installation can be safely raised and lowered while being guided by the lowermost guide rail 11.

  Next, a process of attaching the intermediate guide rail 12 is performed (step S6). FIG. 6 is a diagram illustrating a process of attaching the intermediate guide rail 12 in the elevator 1 installation method according to the present embodiment. The intermediate guide rail 12 is attached by raising the installation work floor 14 as necessary. First, the installation work floor 14 is raised to a position where the worker X riding on the installation work floor 14 reaches the joint plate 11 a attached to the upper end of the lowermost guide rail 11. Next, the rail lifting machine 5 is driven to lift the intermediate guide rail 12 while holding the intermediate guide rail 12 on the lifting rope 7 of the rail lifting machine 5, and the intermediate guide rail 12 is disposed on the upper end side of the lowermost guide rail 11. In this state, the worker X bolts the lower end of the intermediate guide rail 12 on the side where the joint plate 12a is not fixed and the joint plate 11a of the lowermost guide rail 11 using the installation work floor 14 as a scaffold. .

  Next, the installation work floor 14 is raised again to a position where the worker X reaches the rail bracket mounting position of the intermediate guide rail 12. Then, the worker X fixes the intermediate guide rail 12 to the inner wall of the hoistway 2 by the rail bracket 28 using the installation work floor 14 as a scaffold. In the present embodiment, the intermediate guide rail 12 is fixed by one rail bracket 28. For example, the rail bracket 28 is attached to the center of the intermediate guide rail 12.

  Next, an attaching process of the uppermost guide rail 13 is performed (step S7). FIG. 7 is a diagram illustrating a process of attaching the uppermost guide rail 13 in the elevator 1 installation method according to the present embodiment. When the uppermost guide rail 13 is attached, the installation work floor 14 is raised as necessary, as in the case of attaching the intermediate guide rail 12. First, the installation work floor 14 is raised to a position where the worker X riding on the installation work floor 14 reaches the joint plate 12a attached to the upper end of the intermediate guide rail 12. Next, the rail lifting machine 5 is driven to lift the uppermost guide rail 13 while holding the uppermost guide rail 13 on the lifting rope 7 of the rail lifting machine 5, and the uppermost guide rail 13 is disposed on the upper end side of the intermediate guide rail 12. In this state, the worker X bolts the lower end of the uppermost guide rail 13 and the joint plate 12a of the intermediate guide rail 12 using the installation work floor 14 as a scaffold.

  Next, the installation work floor 14 is raised again to a position where the worker X reaches the rail bracket mounting position of the uppermost guide rail 13. Then, the worker X fixes the uppermost guide rail 13 to the inner wall of the hoistway 2 by the rail brackets 29 and 30 using the installation work floor 14 as a scaffold. In the present embodiment, the uppermost guide rail 13 is fixed by two rail brackets 29, 30. For example, the rail brackets 29, 30 are provided at two locations on the upper side and the center of the uppermost guide rail 13. Each can be attached. And the guide rails 11, 12, and 13 of the elevator 1 are fixed to the hoistway 2 by the process so far.

  Thereafter, the elevator 1 is installed according to a normal procedure such as installation of equipment in the hoistway 2, installation of a car, installation of a door of the elevator 1, and the like. In this embodiment, as shown in FIG. 3C, the head of the anchor bolt 22 for fixing the guide rail receiving portion 19 to the hoistway bottom 31 is in a state of being exposed on the floor surface of the hoistway bottom 31. In order to ensure the safety of maintenance work, it is preferable to cut the head of the anchor bolt 22 after the guide rails 11, 12, 13 are installed.

  As described above, in the elevator 1 installation method of the present embodiment, the guide rail receiving portion 19 (pit base 10) is fixed to the hoistway bottom 31 during the installation work of the guide rails 11, 12, and 13, and the guide The lowermost guide rail 11 is fixed to the rail receiving portion 19. For this reason, after the lowermost rail bracket 16 is attached to the lowermost guide rail 11, when the installation work floor 14 is raised, the moment load acting on the lowermost guide rail 11 is applied to the guide rail receiving portion 19 (pit base 10). ) And the lowermost rail bracket 16. Thus, the worker X can attach the second-stage rail bracket 27 to the upper part of the lowermost guide rail 11 using the installation work floor 14 as a scaffold.

  In the conventional elevator installation method, the pit base 10 is not fixed to the hoistway bottom 31. Therefore, conventionally, until the lowermost guide rail 11 is fixed by the lowermost rail bracket 16 and the second rail bracket 27, the lowermost guide rail 11 can withstand the moment load generated when the installation work floor 14 is raised and lowered. I can't. That is, when the guide rail receiving part 19 is not fixed to the hoistway bottom part 31 as in the prior art, when the installation work floor 14 is moved up and down for the attachment of the second stage rail bracket 27, There is a possibility that the lowermost guide rail 11 and the pit base 10 are displaced due to a moment load generated in the pit. For this reason, conventionally, the second-stage rail bracket 27 has been operated using a scaffold assembled to the hoistway bottom 31.

  On the other hand, in this embodiment, since the installation work floor 14 can be raised to attach the second-stage rail bracket 27, the second-stage rail bracket 27 is attached using the installation work floor 14 as a scaffold. Therefore, it is not necessary to assemble a fixed scaffold on the hoistway bottom 31. In addition, since the lower rail bracket 16 is mounted and the work floor 14 for assembly is also within the range in which the worker X can work using the hoistway bottom 31 as a scaffold, temporary installation is performed on the hoistway bottom 31 throughout the guide rail installation process. There is no need to assemble a fixed scaffold with materials. Therefore, it is possible to reduce the labor and installation work cost for carrying in the temporary material for assembling the fixed scaffold to the hoistway bottom 31 or assembling the fixed scaffold.

  In the present embodiment, the lowermost rail bracket 16 is provided at a position 800 mm from the hoistway bottom 31. However, the present invention is not limited to this. In the present embodiment, the lowermost guide rail 11 may be fixed by the lowermost rail bracket 16 and the guide rail receiving portion 19 so as to be able to withstand the load moment generated when the installation work floor 14 is raised and lowered. Therefore, the height of the lowermost rail bracket 16 depends on various factors such as the thickness and length of the lowermost guide rail 11 and the number of bolts used for fixing within the range where the hoistway bottom 31 is attached as a scaffold. Can be determined.

  In the present embodiment, after the guide rails 11, 12, and 13 are installed, it is preferable to cut the head of the anchor bolt 22 for fixing the guide rail receiving portion 19 to the hoistway bottom portion 31. The anchor bolt 22 may be removed. That is, after the guide rails 11, 12, and 13 are installed, the guide rail receiving portion 19 is fixed to the hoistway bottom 31 by the weight of the guide rails 11, 12, and 13, so that the anchor bolt 22 is removed. May be.

  In the present embodiment, the pit base 10 is configured by the pit base main body 18 and the guide rail receiving portion 19. However, the pit base main body 18 may also function as the guide rail receiving portion 19. An example in which the base 10 is configured only by the guide rail receiving portion 19 may be used. Since the pit base main body 18 is fixed to the guide rail receiving portion 19 as in the present embodiment, the force that supports the moment load applied when the installation work floor 14 is raised after the lowermost rail bracket 16 is attached. Can be made more stable. In addition, on the upper surface of the pit base main body 18, a shock absorber for reducing the impact when the installation work floor 14 or the car drops to the lowermost part of the hoistway 2 is usually arranged.

  In the present embodiment, the lowermost guide rail 11 is fixed to the hoistway 2 with two rail brackets, the lowermost rail bracket 16 and the second rail bracket 27. However, depending on the specifications of the elevator, The lower guide rail 11 may be fixed by one rail bracket. In this case, the second-stage rail bracket 27 is a rail bracket for fixing the second-stage guide rail (the intermediate guide rail 12 in the present embodiment) to the hoistway 2. As described above, even when the lowermost guide rail 11 is fixed by one rail bracket, the process up to step S4 in FIG. 1 is the same as in the present embodiment. After the step guide rail 12 is attached to the lowermost guide rail 11, the step of attaching the second step rail bracket 27 is performed. In this case as well, since the installation work floor 14 can be raised before the second-stage rail bracket 27 is attached, the same effects as in the present embodiment can be obtained.

  In this embodiment, the pit base 10 is fixed to the hoistway bottom 31 after the step of attaching the lowermost rail bracket 16 (step S2) and the step of assembling the installation work floor 14 (step S4). It was done before. However, the pit base 10 may be fixed to the hoistway bottom 31 at any stage as long as it is a stage before the installation work floor 14 is assembled. For example, after the pit base 10 is disposed on the hoistway bottom 31 and before the lowermost guide rail 11 is disposed, after the lowermost guide rail 11 is disposed, the lowermost rail bracket It may be before 16 is attached. By fixing the pit base 10 to the hoistway bottom 31 in the process before assembling the installation work floor 14, the load moment applied when the installation work floor 14 is assembled and the load moment applied when the installation work floor 14 is raised and lowered Can be supported.

  As in the present embodiment, after fixing the lowermost guide rail 11 with the lowermost rail bracket 16, the pit base 10 is fixed to the hoistway bottom 31 with the anchor bolts 22 so that the lowermost guide rail 11 is raised. Even after installation, the pit base 10 can be finely adjusted.

  Further, in this embodiment, the pit base 10 is fixed by driving the anchor bolts 22 into the guide rail receiving portion 19 at two positions sandwiching the lowermost guide rail 11. The width between the anchor bolts 22 can be variously changed.

  In the present embodiment, the car is installed in the process after the guide rails are attached. However, the installation work floor 14 may be used as it is as the car floor. Further, in this embodiment, the rail lifting machine 5 and the work floor lifting machine 6 may be a simple lifting machine capable of lifting the rails and the work floor, and are used for raising and lowering the elevator car of the actual elevator. It is also possible to use a winding machine.

  As described above, the present invention has been described based on the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the configuration can be appropriately changed without departing from the gist thereof. Is. For example, the above-described exemplary embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Elevator, 2 ... Hoistway, 3 ... Top stage, 4 ... Hanging beam, 5 ... Rail lifting machine, 6 ... Work floor lifting machine, 10 ... Pit base, 11 ... Bottom guide rail, 12 ... Middle part guide rail , 13 ... Top guide rail, 14 ... Installation work floor, 16 ... Bottom rail bracket, 18 ... Pit base body, 19 ... Guide rail receiving part, 21 ... Rail clip, 22 ... Anchor bolt, 27 ... Second stage Rail bracket, 31 ... Bottom of hoistway

Claims (4)

Assembling a pit base at the bottom of the hoistway where the elevator car goes up and down;
On the pit base, a lowermost guide rail is erected at a predetermined position facing a space where the car goes up and down, and a lower part of the lowermost guide rail is fixed to the pit base;
Fixing the lowermost guide rail to the hoistway with a first rail bracket using the bottom of the hoistway as a scaffold;
Assembling a work floor for installation in a state of being fixedly supported by the lowermost guide rail;
Fixing the pit base to the bottom of the hoistway after the step of arranging the pit base and before the step of assembling the work floor for installation;
A step of raising the assembled work floor,
An elevator installation method comprising: After raising the work floor for installation, using the work floor for installation as a foothold, above the first rail bracket and above the lowermost guide rail or the lowermost guide rail with a second rail bracket The elevator installation method according to claim 1, further comprising: fixing a second-stage guide rail erected on the hoistway. The step of fixing the pit base to the bottom of the hoistway is after the step of fixing the lowermost guide rail to the hoistway with the first rail bracket and before the step of assembling the installation work floor. The elevator installation method according to claim 1 or 2. The step of fixing the pit base to the bottom of the hoistway is after the step of fixing the lower portion of the lowermost guide rail to the pit base, and the lowermost guide rail is fixed by the first rail bracket. The elevator installation method according to claim 1 or 2, wherein the elevator installation method is performed before the step of performing the step.

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