JP6626809B2 - Elevator renewal work method - Google Patents

Description

  The present invention relates to an elevator renewal work method, and is particularly suitable for application to an elevator renewal work method for renewing an aging existing hydraulic elevator to a new (hereinafter also referred to as “new”) rope type elevator. is there.

  2. Description of the Related Art Conventionally, when an elevator facility is renewed over time, a method of removing an existing hydraulic elevator and then installing a new rope elevator is generally adopted. However, in such a construction method, the existing elevator cannot be used during the period in which the renewal work is being performed, so that the user is required to reduce the non-operating time of the elevator during the renewal work.

  When renewing an existing hydraulic elevator to a new rope-type elevator, generally, after removing all equipment such as plungers, plunger rails, piping, and hydraulic units, the equipment for the existing hydraulic elevator, A counterweight, a guide rail for the counterweight and a hoist, etc., which are equipment for a type elevator, will be newly installed. That is, a construction method is adopted in which all equipment used in the existing hydraulic elevator is removed, and then equipment used in the new rope elevator is newly installed.

  However, since the construction period is long in such a general construction method, in order to shorten the construction period, the car guide rail and the plunger rail of the existing hydraulic elevator are removed using the car of the existing hydraulic elevator. A method has been proposed (see Patent Document 1).

JP 2013-241239 A

  However, in the above-described conventional technology, the method of removing the plunger, which is the largest device in the existing hydraulic elevator, was not considered, and thus the construction period could not be sufficiently reduced.

  The present invention has been made in view of the above points, and it is an object of the present invention to propose an elevator renewal work method capable of shortening a construction period by efficiently removing a plunger of an existing hydraulic elevator.

  In order to solve such a problem, in the present invention, the existing hydraulic elevator that lifts and lowers the existing car along the existing guide rail using the existing plunger in the hoistway is removed, and in the hoistway, An elevator renewal work method for renewing a rope-type elevator that raises and lowers a new car fixed to one end of the rope along a new guide rail in accordance with hoisting and lowering of the rope by the hoisting machine, A temporary lifting device is attached to the top of the hoistway using the existing car positioned at the top of the hoistway as a scaffold, and the existing car is used as a scaffold while lowering the existing car from the top. Remove the existing guide rail, and then remove the existing car and place it at the bottom of the hoistway. A part of the new guide rail is installed in the hoistway, and the new car, or a new car floor constituting a part of the new car, is part of the new guide rail. The new car or the new car floor is lifted in accordance with the winding of the rope by the temporary lifting device while being fixed to one end of a rope extending from the temporary lifting device to the bottom while being attached to the temporary lifting device. The rest of the new guide rail, which is a continuation of a part of the new guide rail, is installed in the hoistway, and the existing plunger is suspended by a hoist provided above the hoistway. Removing the existing plunger while raising and lowering the newly-installed car or the newly-installed car floor by the temporary elevating device, and installing necessary new equipment including the hoisting machine. Location, and characterized by constituting the roped elevator by removing the lifting device of the temporary the car thereafter the newly as a scaffold.

  According to the present invention, the construction period can be shortened by efficiently removing the plunger of the existing hydraulic elevator.

It is a sectional view showing the schematic structure of the hydraulic elevator to which the elevator renewal work method by this embodiment is applied. It is a flowchart which shows an example of the renewal work method of the elevator by this Embodiment. It is sectional drawing which shows the procedure which attaches a raising / lowering apparatus using an existing car as a scaffold. It is sectional drawing which shows the procedure which removes a main rail using an existing car as a scaffold. It is sectional drawing which shows the procedure of dismantling the existing car. It is sectional drawing which shows the procedure which assembles the lowest scaffold at the bottom of a hoistway, and installs the newly installed main rail at the bottom. It is sectional drawing which shows the procedure of installing the working floor which raises and lowers with the raising / lowering apparatus attached previously using the newly built car floor. It is sectional drawing which shows the procedure of disassembling a plunger using a work floor. It is sectional drawing which shows the procedure which cut | disconnects a disassembled plunger and carries out. It is sectional drawing which shows the procedure which cut | disconnects and carries out a plunger. It is sectional drawing which shows the procedure of disassembling a cylinder using a work floor. It is sectional drawing which shows the procedure of disassembling a plunger rail using a work floor. It is sectional drawing at the time of the renewal construction of a new rope type elevator being installed and an elevator being completed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
(1) Elevator Renewal Work Method According to the Present Embodiment FIG. 1 is a cross-sectional view showing an example of the configuration of an elevator in which the elevator renewal work method according to the present embodiment is performed. In the present embodiment, an indirect hydraulic elevator is exemplified as the elevator equipment. The hydraulic elevator is provided in a hoistway 1 and includes a plunger 4 that expands and contracts in a vertical direction, and a plunger rail 6 that guides the expansion and contraction operation of the plunger 4 in a vertical direction.

  In this hydraulic elevator, a rotary sheave (not shown) is provided at the top of the plunger 4. The main rope 4a is wound around the rotating sheave. One end of the main rope 4 a is fixed to the car 2, and the other end of the main rope 4 a is fixed to a stand below the plunger 4 at the bottom of the hoistway 1.

  When the plunger 4 expands and contracts up and down, the car 2 moves up and down the hoistway 1 along the main rail 3 in conjunction with the plunger 4. In the following description, an installed car is referred to as an “existing car”. In the present embodiment, newly provided equipment is also referred to as “newly installed” so as to be easily distinguished from existing equipment.

  FIG. 2 is a flowchart showing an example of each operation procedure in the elevator renewal operation method according to the present embodiment. This renewal work method relates to, for example, an elevator without a machine room. In the following description, work procedures that have been conventionally performed will be described in a simplified manner, while work that is characteristic in the present embodiment will be described in detail.

  In the elevator renewal work method according to the present embodiment, the existing hydraulic elevator for raising and lowering the existing car 2 along the existing main rail 3 using the existing plunger 4 in the hoistway 1 is removed, and the elevator is moved up and down. A case is shown in which a new elevator car fixed to one end of the rope is to be renewed to a rope-type elevator that moves up and down along a newly installed guide rail in response to hoisting and lowering of the rope by a hoist in a road 1. .

  First, construction and safety measures are taken (Step S1), and a product is carried in (Step S2). As shown in FIG. 1, a temporary enclosure 9 is installed on the opposite side of the hoistway 1 of the landing door 8 (step S3). Such a temporary enclosure 9 can prevent dust and the like from flowing into the building from inside the hoistway 1 during the renewal work. Thereafter, the existing entrance is removed (Step S4), and the existing main rail 3 located at the uppermost position is cut (Step S5).

  Next, as shown in FIG. 3, the suspension beam 10 is attached to the top of the hoistway 1 using the existing car 2 positioned almost at the top of the hoistway 1 as a scaffold. The device 11 is mounted via the elevating device mounting bracket 12 (steps S6 and S7).

  After attaching the lifting device 11, a control panel 11b for controlling the driving of the lifting device 11 is installed at the bottom of the hoistway 1, and the control for connecting the lifting device 11 and the control panel 11b using the existing car 2 as a foothold. The cable 11c is installed (Step S7). Subsequently, the lifting device rope 11 a is attached to the lifting device 11.

  Subsequently, a template is set for the main rail 3 (step S8). A new rail bracket is attached using the existing car 2 as a scaffold (step S9). A temporary governor pulley and a temporary governor rope are attached (step S10).

  Next, using the existing car 2 as a scaffold, for example, an emergency lowering valve (not shown) is operated to position the existing car 2 at the top of the hoistway 1 (step S11). Thereafter, the power supply of the building is disconnected (step S12). The lower balance is disassembled (step S13).

  Next, while operating the emergency lowering valve to lower the existing car 2 from the top as shown in FIGS. 3 and 4, the main rail 3, the main rail bracket 3a for the existing car 2 and The wiring is gradually removed together (step S14).

  Next, when the existing car 2 is lowered to the lowermost part of the hoistway 1, the existing car 2 is removed and the wiring is removed as shown in FIG. 5 (step S15). Further, the lowermost part of the main rail 3 in the hoistway 1 is removed (step S16). Thereafter, the existing pit base is removed (step S17), the lower balance is re-stretched (step S18), and the centering of the new pit base is performed (step S19).

  Next, as shown in FIG. 6, the lowermost part of the newly installed main rail bracket 14 a for fixing the newly installed main rail 14 to the wall surface of the hoistway 1 is mounted on the lowermost part of the hoistway 1. The scaffold 13 is assembled (Step S20). Thereafter, using the lowermost scaffold 13, a new main rail 14 attached to guide a new car 17, which will be described later, and a new main rail bracket 14 a are directed from the bottom to the top of the hoistway 1. To the inner wall of the hoistway 1 (step S21).

  Next, the lowermost scaffold 13 assembled as described above is disassembled and carried out of the hoistway 1 as shown in FIG. 7 (step S22). Thereafter, the sling is divided (step S23). The newly installed car floor 15 is carried into the hoistway 1 and incorporated into the newly installed main rail 14 installed on the hoistway 1, and the hoisting device rope 11a is attached (step S24). The newly-installed car floor 15 constitutes a car floor of a newly-installed car 17 in a later-described rope-type elevator. A work handrail 15a and a work handrail 15b are attached to the newly-installed car floor 15 for ensuring safety. In the following description, as an example, the newly-installed car floor 15 to which the work handrails 15a and the working jigsaws 15b are attached will be used as a scaffold in the following. Alternatively, the newly installed car 17 itself may be used as a scaffold.

  Subsequently, the operation panel 11d of the elevating device 11 is attached to the work handrail 15a attached to the newly installed car floor 15. The operation panel 11d and the control panel 11b are connected using an operation cable 11e. The control panel 11b can be controlled via the operation cable 11e in accordance with the operation of the operation panel 11d, and the control panel 11b can control the driving of the lifting / lowering device 11. As a result, the newly built car floor 15 as a work scaffold can be moved up and down by the elevating device 11. Thereafter, a test run is performed, an assembly check is performed, and the in-house inspection ends (step S25).

  Next, as shown in FIG. 7, the newly installed main rails 14 are sequentially mounted upward while the newly installed car floor 15 is raised by using the lifting device 11 (step S26). A new governor pulley and a new governor rope (not shown) are attached (step S27). The governor is replaced and the temporary governor is removed (step S28).

  Next, as shown in FIG. 8, the new car floor 15 is stopped at a predetermined position. The plunger 4 of the existing hydraulic elevator is temporarily lifted by using a lifting machine 16 installed on the top of the hoistway 1. At that time, the plunger 4 is gradually suspended from the lower end in each cutting portion 100 shown by a broken line as shown in FIG. Be cut off.

  Thereafter, the plunger 4 is disassembled by being further cut at the bottom of the hoistway 1 at the next cutting portion 100 as shown in FIG. And is removed (step S29). In this way, the plunger 4, which is a large and heavy equipment, can be easily removed from the existing hydraulic elevator, and the construction period can be shortened.

  Subsequently, as shown in FIG. 11, the cylinder 5 of the plunger 4 is also lifted using the lifting machine 16 like the plunger 4, cut and dismantled at each cutting section 100, and carried out of the hoistway 1. (Step S30).

  Subsequently, the plunger rail 6 guiding the plunger 4 is fixed to the inner wall of the hoistway 1 as shown in FIG. The plunger rail bracket 6a is dismantled. The plunger rail 6 and the plunger rail bracket 6 a are suspended and lowered in the hoistway 1 using the lifting machine 16, and are carried out of the hoistway 1. Thereafter, the temporary enclosure 9 is removed (Step S31).

  When the existing hydraulic elevator is removed as described above, for example, the following new rope-type elevator is installed as necessary new equipment, and inspection is performed (steps S32 to S50). The method of renewing the elevator according to the present embodiment is mainly characterized by the method of removing the existing hydraulic elevator. Therefore, the following description of the method of attaching the rope type elevator is omitted as appropriate, Some modifications from the steps of the flowchart shown in FIG.

  As a method for installing a new rope elevator, first, a lower car pulley 17a and the like are assembled to a new car floor 15 as shown in FIG. This eliminates the need to prepare a dedicated scaffold as a work floor in the above-described removal work, and to remove the scaffold after use. Next, a new landing door 18 is attached. A hoisting machine 19 capable of hoisting and lowering a rope is installed at a lower portion in the hoistway 1. Further, a counterweight (hereinafter abbreviated as “C. wt”) rail 20 is a C.W. It is attached to the inner wall of the hoistway 1 via the wt rail bracket 20a. Thereafter, C.I. wt. With the pulley 21a attached, C.I. A wt rail 20 is incorporated in these. Furthermore, after the plurality of upper pulleys 23 are attached using the newly installed car floor 15 as a scaffold, and the newly installed main rope 22 is wound in the illustrated state, the renewal work for the newly installed rope type elevator is completed. After the necessary new facilities including the hoisting machine 19 are installed, the temporary elevator 11 and the like are removed using the newly installed car 2 as a foothold.

(2) Effects of the present embodiment, etc. As described above, according to the elevator renewal work method according to the present embodiment, first, the existing car 2 is lowered while using the existing car 2 positioned at the top. In addition to removing some of the equipment, and also removing some of the other existing equipment using some of the new equipment such as the new car floor 15, efficiently remove all of the existing equipment. The construction period can be shortened as compared with the conventional case.

  Further, for example, when cutting the plunger 4, the newly built car floor 15 can be used as a scaffold, so that the cutting and removing work of the plunger 4 can be made more efficient, and the construction period can be shortened. At the bottom of the hoistway 1, when the cut and dismantled plunger 4 and the cylinder 5 are carried out of the hoistway 1, if the newly built car floor 15 is raised, the unloading work is not obstructed. As a result, more efficient work can be expected, and the construction period can be further shortened.

  As described above, according to the present embodiment, the construction period can be shortened as a whole by enabling the newly-installed car floor 15 to be raised and lowered at an early stage and efficiently removing the plunger 4.

(3) Other Embodiments The above embodiments are examples for describing the present invention, and are not intended to limit the present invention only to these embodiments. The present invention can be implemented in various forms without departing from the spirit thereof. For example, in the above embodiment, the processing of various programs has been described sequentially, but the present invention is not particularly limited to this. Therefore, as long as no inconsistency occurs in the processing results, the processing order may be changed or the processing may be performed in parallel.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to renew an aging hydraulic elevator to a new rope type elevator.

  1 ... hoistway, 2 ... car, 3 ... main rail, 3a ... main rail bracket, 4 ... plunger, 5 ... cylinder, 6 ... plunger rail, 6a ... plunger rail bracket , 7 ... main rope, 9 ... temporary enclosure, 10 ... suspension beam, 11 ... lifting device, 11a ... lifting device rope, 11b ... control panel, 11c ... control cable, 11d ... operation panel, 11e Operation cable, 12 Mounting bracket for elevating device, 13 Lower scaffold, 14 Main rail, 14a Main rail bracket, 15 Car floor, 15a Work railing, 15b Working person, 16 ... lifting machine, 16a ... lifting rope, 17 ... car, 17a ... cage lower pulley, 18 ... landing door, 19 ... hoisting machine, 20 ... C. wt rail, 20a ... C. wt rail bracket, 21 ... C. wt, 21a ... C. wt pulley, 22 main rope, 23 upper pulley, 100 cutting section.

Claims (3)

Remove the existing hydraulic elevator that raises and lowers the existing car along the existing guide rail using the existing plunger in the hoistway, and removes the existing elevator according to the hoisting and lowering of the rope by the hoist in the hoistway. In an elevator renewal work method of renewing a new elevator car fixed to one end of a rope to a rope type elevator that moves up and down along a new guide rail,
A temporary elevating device is attached to the top of the hoistway using the existing car positioned at the top in the hoistway as a scaffold,
While lowering the existing car from the top, remove the existing guide rails using the existing car as a foothold, then remove the existing car, and install the new car at the bottom of the hoistway. A part of the guide rail is installed in the hoistway,
The new car, or a new car floor constituting a part of the new car, is attached to a part of the new guide rail, and one end of a rope extending from the temporary lifting device to the bottom. The new guide, which is a continuation of a part of the newly installed guide rail, while raising the newly installed car or the newly installed car floor in accordance with the winding of the rope by the temporary elevating device in a state where Install the rest of the rails in the hoistway,
The existing plunger is suspended by a hoist provided at the upper part of the hoistway, and the existing plunger is removed while lifting or lowering the new car or the new car floor by the temporary lifting device. ,
A method for renewing an elevator, comprising: installing necessary new facilities including the hoist, and then removing the temporary elevating device by using the newly installed car as a scaffold to configure the rope-type elevator. .   The existing plunger is removed by being cut by using the newly-installed car floor as a scaffold which can be raised and lowered by the temporary lifting device while being suspended by a hoist provided at an upper portion of the hoistway. The method for renewing an elevator according to claim 1, wherein:   3. The elevator according to claim 1, wherein the new car is constructed by incorporating a remaining portion of the new car into the new car floor. 4. Renewal work method.

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