JP6387217B2 - Working scaffold installation method - Google Patents

Description

  The present invention relates to a work scaffold installation method.

  As a building space, for example, there is an elevator shaft configured such that an elevator car moves up and down in an interior space that is long in the vertical direction. In such an elevator shaft, asbestos (corresponding to deposits) constructed for fireproof coating of a steel frame may remain attached to the steel frame as it is (see, for example, Patent Document 1). For this reason, it is necessary to perform removal or detoxification (containment etc.) as soon as possible before asbestos is scattered.

JP 2011-36745 A

  When a working scaffold is provided above the existing elevator car, asbestos in the elevator shaft can be processed by raising and lowering the elevator car.

  However, the size of the overhead (the height from the upper surface of the elevator car to the ceiling of the elevator shaft when the elevator car stops at the top stop floor) differs depending on the building. For this reason, when the overhead is large, there is a possibility that asbestos in the elevator shaft (particularly the ceiling portion) cannot be reliably removed.

  This invention is made | formed in view of this subject, The place made into the objective is to provide the working scaffold installation method which can process the deposit | attachment in an elevator shaft more reliably.

In order to achieve such an object, the work scaffold installation method of the present invention includes:
The space in the elevator shaft in a building having a floor above the uppermost stop floor of the elevator car, the uppermost from the upper surface of the elevator car when the elevator car stops at the uppermost stop floor Measuring step of measuring the height to the ceiling of the space provided on the floor above the stop floor,
A working scaffold for treating deposits in the elevator shaft is lower than the height measured in the measuring step, and the working scaffold is disposed when the elevator car stops at the top stop floor. A work scaffold installation step in which the worker on the work floor is provided at the upper part of the elevator car at a height at which the deposits on the ceiling can be treated;
Have
The work floor is an uppermost work floor among a plurality of work floors provided in the work scaffold .

In this work scaffold installation method, it is desirable to further include a guide member installation step of providing a guide member for guiding the lifting / lowering of the work scaffold at a position engageable with the lifting / lowering guide rail of the elevator car.
According to such a work scaffold installation method, it is possible to improve the stability of the work scaffold.

In this work scaffold installation method, it is preferable that the work scaffold further includes a bouncing equipment installation step of jumping between the work scaffold and a side wall of the elevator shaft.
According to such a work scaffold installation method, it is possible to expand the work space or prevent the fall of deposits.

In this work scaffold installation method, the jumping equipment is jumped from the work scaffold to the side wall of the elevator shaft when the elevator car is stopped, and stored on the side of the work scaffold when the elevator car is raised or lowered. It is desirable that the wall portion of the working scaffold is formed.
According to such a work scaffold installation method, work efficiency can be improved when processing deposits, and safety can be improved when moving up and down in an elevator car.

In this work scaffold installation method, it is desirable that the work scaffold is provided in a plurality of stages in the work scaffold installation process.
According to such a work scaffold installation method, it is possible to increase the area of a storage place for treated deposits and the like.

  According to the present invention, it is possible to reliably treat deposits in the elevator shaft.

It is side sectional drawing of the elevator EV which is the application object of the working scaffold installation method of this embodiment. It is a figure which shows the state which provided the working scaffold 30 in the upper part of the elevator car 10 of FIG. 3A is an enlarged side view showing the work scaffold 30 of FIG. 2, and FIG. 3B is a top view of FIG. 3A. It is explanatory drawing of the work scaffold 30 of 2nd Embodiment. It is explanatory drawing of the guide member. It is explanatory drawing of the work scaffold 30 of 3rd Embodiment. It is the schematic for demonstrating the structure of the fall prevention equipment. 8A to 8C are explanatory diagrams of operations of the folding scaffold 50 and the fall prevention equipment 60. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

=== Embodiment ===
In the present embodiment, in the interior space of the elevator shaft, asbestos (corresponding to deposits) already sprayed as a fireproof coating on a steel beam or the like is removed or rendered harmless. In the following description, the direction in which the elevator car moves up and down in the elevator shaft is referred to as the vertical direction (vertical direction). In addition, a direction along a wall surface provided with an opening for getting on and off the elevator car is referred to as a left-right direction (horizontal direction), and a direction that is a depth direction with respect to the elevator car is referred to as a front-rear direction (horizontal direction).
<< Elevator configuration >>
FIG. 1 is a side sectional view of an elevator EV that is an application target of the work scaffold installation method of the present embodiment.

  As shown in FIG. 1, the elevator EV includes an elevator shaft EVS partitioned into a part of a building such as a building, and an elevator car 10 that is guided so as to be vertically movable up and down along the vertical direction in the elevator shaft EVS. A hoisting machine 19 that is disposed in a machine room MR above the elevator shaft EVS and lifts the elevator car 10 up and down using a suspension rope R provided with a counterweight (hereinafter referred to as a counterweight) W. And.

  The elevator shaft EVS is a rectangular parallelepiped space that is long in the vertical direction. In this elevator shaft EVS, a steel beam (not shown) and a steel column (not shown) are assembled in a substantially rectangular parallelepiped shape that is long in the vertical direction, and a column beam frame is constructed. Further, a concrete panel such as an ALC (bubble concrete) plate is disposed between the steel beams adjacent in the vertical direction, whereby the side wall 23 of the elevator shaft EVS is formed so as to surround the front, rear, left and right sides. Moreover, the ceiling part 26 is formed in the upper end of the elevator shaft EVS, and the floor part 28 is formed in the lower end. Thereby, the inside of the elevator shaft EVS is a substantially closed space in which all of the six directions of up, down, front, back, left and right are closed.

  The front side wall 23 of the four side walls 23 is formed with an entrance (not shown) for the elevator EV corresponding to each floor of the building, and slides to the left and right at the opening. An opening / closing door 24 is provided. In the present embodiment, the nth floor (n> 1) and the (n-1) th floor are atriums, and the top stop floor of the elevator car 10 is the (n-1) th floor. . That is, the open / close door 24 is provided up to the (n−1) floor.

  By the way, in general, the steel beam of the column beam frame or the steel frame of the steel column may be partially exposed in the elevator shaft EVS. And for such steel exposed parts, fireproof coating is indispensable under the Building Standards Act, and asbestos has been used as the material before. Therefore, asbestos may still be exposed in the existing elevator shaft EVS.

  For such asbestos, for example, a detoxification process is performed in conjunction with the facility renewal work for the existing elevator EV. The detoxification treatment includes physical removal such as peeling asbestos, confinement treatment that hardens the surface of the application site by chemical solution application, etc. For example, an enclosing process for enclosing and not exposing to the outside.

<< About asbestos treatment equipment >>
As a method for performing the treatment on such deposits (asbestos), there is a method in which a temporary gondola is hung from the ceiling portion 26, and an operator on the gondola handles the deposits on the elevator shaft EVS while raising and lowering the gondola. is there. However, in this case, since the temporary gondola is only hung from the ceiling portion 26, there is a problem that the foot is shaken and safety cannot be secured. Moreover, since there are few places for the removed asbestos etc., the gondola must be repeatedly moved up and down, and there is a problem that processing takes time.

  Therefore, in the present embodiment, a work space (working scaffold) for processing asbestos is provided in the upper part of the elevator car 10. Since the elevator car 10 is lifted and lowered by being guided by the guide rails for lifting and lowering, the elevator car 10 is less stable and stable than the temporary gondola.

  However, in general, the size of overhead varies depending on the building. The overhead is a distance (height) between the upper surface of the elevator car 10 and the ceiling portion 26 when the elevator car 10 stops at the top stop floor.

  For example, in the case of this embodiment, as described above, the top stop floor of the elevator car 10 is the (n-1) floor. That is, the distance (height indicated by H1 in the drawing) between the upper surface of the elevator car 10 and the ceiling portion 26 when the elevator car 10 stops on the n-1 floor is overhead. In the present embodiment, the overhead height H1 is 5 m.

  Thus, when the overhead is large, there is a possibility that the deposit (asbestos) on the ceiling portion 26 of the elevator shaft EVS cannot be processed even if a normal work scaffold is provided on the upper part of the elevator car 10.

  Therefore, in the present embodiment, it is possible to reliably perform asbestos processing in the elevator shaft EVS (particularly the ceiling portion 26) regardless of differences in overhead due to buildings.

<< About the structure of the work scaffold >>
FIG. 2 is a diagram showing a state in which a work scaffold 30 is provided on the upper part of the elevator car 10 of FIG. 3A is an enlarged side view showing the work scaffold 30 of FIG. 2, and FIG. 3B is a top view of FIG. 3A.

  As shown in the figure, on the upper part of the elevator car 10, a large number of single-pipe pipes 31 are combined in a vertical direction, a horizontal direction, and an oblique direction to form a framework (handrail, etc.) of the work scaffold 30. Yes.

  The work scaffold 30 is provided with a two-step work floor 32 in the vertical direction. Further, a baseboard 33 is provided around the work floor 32 (at the end in the horizontal direction). The upper and lower work floors 32 have the same configuration.

  As shown in FIG. 3B, the work floor 32 is configured by arranging rectangular cloth plates 32a, 32b, and 32c made of aluminum. The cloth board 32a is an open / close hatch type cloth board, and a partial opening / closing hatch (a left part of the cloth board 32a) and a trap 34 are mounted. An operator can get on and off the work floor 32 by opening the opening / closing hatch of the cloth board 32a.

<< About the work scaffold installation method >>
Next, the installation method of the work scaffold in this embodiment is demonstrated.

  First, in the space in the elevator shaft EVS, the distance (height H1) from the top surface of the elevator car 10 to the ceiling 26 when the elevator car 10 stops at the top stop floor (here, n-1 floor). Is measured (measurement process). In the present embodiment, the height H1 is 5 m.

  Next, when the elevator car 10 stops at the (n−1) floor, the elevator car 10 has a height that does not collide with the ceiling (in other words, a height lower than the height H1 measured in the measurement process) and the elevator car 10. Determines the height H2 at which the worker (on the work scaffold 30) can process the asbestos on the ceiling 26 when stopped on the (n-1) floor. And the work scaffold 30 is provided in the upper part of the elevator car 10 so that it may become the height H2 (work scaffold installation process).

  In this embodiment, the height H2 of the work scaffold 30 is set to 4.5 m with respect to the overhead height H1 (5 m). Note that the distance between the upper end of the work scaffold 30 and the work floor 32 (upper stage) is 0.9 m. That is, the distance between the upper work floor 32 and the ceiling part 26 is 1.4 m, and the worker on the work floor 32 can perform asbestos processing on the ceiling part 26.

  Thus, by providing the work platform 30 with the height H2 defined, when the elevator car 10 stops at the top stop floor (n-1), the worker of the work platform 30 can connect the ceiling 26. Asbestos can be processed. Therefore, the asbestos processing in the elevator shaft EVS (particularly the ceiling portion 26) can be reliably performed.

  As described above, in the present embodiment, first, in the space in the elevator shaft EVS, the ceiling from the upper surface of the elevator car 10 when the elevator car 10 stops at the top stop floor (n-1 floor). The height H1 up to the portion 26 is measured. Next, the height (H2) that is lower than the height H1 and that allows the worker on the work scaffold 30 to process asbestos on the ceiling 26 when the elevator car 10 stops on the (n-1) floor. It has established. And the work scaffold 30 for processing the asbestos in the elevator shaft EVS is provided in 10 upper part of the elevator car so that it may become height H2.

  By doing so, asbestos in the elevator shaft EVS (particularly the ceiling portion 26) can be reliably processed regardless of the difference in the size of the overhead depending on the building.

=== Second Embodiment ===
When the height of the work scaffold 30 is increased, there is a risk that the stability may be reduced against an unexpected external force (for example, an earthquake). Therefore, in the second embodiment, stability is improved.

  FIG. 4 is an explanatory diagram of the work scaffold 30 according to the second embodiment. In FIG. 4, the same components as those in FIG.

  A guide member 40 is provided on the work scaffold 30 of the second embodiment. That is, the second embodiment further includes a step of providing the guide member 40 (guide member installation step).

FIG. 5 is an explanatory view of the guide member 40. In addition, GR shown in the drawing is a guide rail for guiding the elevator car 10 to move up and down, and is provided along the vertical direction from the ceiling portion 26 to the floor portion 28 in the elevator shaft EVS. As shown in the figure, the guide rail GR has a T-shaped horizontal cross section.
The guide member 40 includes a support member 41 and a rotation member 43.

  One end side of the support member 41 pivotally supports the rotating member 43 in a rotatable manner. The other end side of the support member 41 is fixed to a side portion of the upper work floor 32 in the work scaffold 30 (see FIG. 4).

  The rotating member 43 has an engaging groove 44 that engages with the guide rail GR of the elevator car 10 around the rotating member 43, and rotates along the guide rail GR in a state where the engaging groove 44 is engaged with the guide rail GR.

  By providing the guide member 40 as described above, the work scaffold 30 can be maintained in a more stable state when the elevator car 10 moves up and down or is stopped.

  Thus, in 2nd Embodiment, the guide member 40 engaged with the guide rail GR which guides the raising / lowering of the elevator car 10 is provided. Also in the second embodiment, since the work scaffold 30 is provided on the upper part of the elevator car 10 so as to have the height H2, the asbestos in the elevator shaft EVS can be reliably processed. Moreover, in 2nd Embodiment, stability can be improved even when the height H2 of the work scaffold 30 is large.

=== Third Embodiment ===
In the third embodiment, work efficiency is improved.
FIG. 6 is an explanatory diagram of the work scaffold 30 according to the third embodiment. FIG. 7 is a schematic diagram for explaining the configuration of the fall prevention facility 60. 6 and 7, the same components as those in FIG.

  The work scaffold 30 of the third embodiment is provided with a folding scaffold 50 and a fall prevention facility 60. Note that the folding scaffold 50 and the fall prevention equipment 60 correspond to a spring-out equipment. That is, in 3rd Embodiment, it further has the process (bounce-equipment installation process) of providing a bounce-out installation.

  The folding scaffold 50 is provided on the upper work floor 32 side, and the fall prevention facility 60 is provided on the lower work floor 32 side. The folding scaffold 50 and the fall prevention facility 60 are provided around the work scaffold 30 so as to surround the work floor 32.

The folding scaffold 50 includes a support member 51, a plate material 53, and a plate material 55.
The support member 51 is formed of, for example, a single pipe and is provided in two stages in the vertical direction. One end of each support member 51 is provided on the single pipe 31 of the work scaffold 30 so as to be rotatable about the axis of the single pipe 31. Further, the other end of each support member 51 is rotatably provided on the plate member 53. The support member 51 constitutes a handrail when the folding scaffold 50 is jumped to the side wall 23 side of the elevator shaft EVS.

  The plate material 53 is a plate-shaped member made of metal (for example, aluminum), and constitutes a side wall of the folding scaffold 50.

  The plate member 55 is a plate member made of metal (for example, aluminum). One end of the plate member 55 is provided on the single pipe 31 of the work scaffold 30 so as to be rotatable about the axis of the single pipe 31. Note that the plate member 55 and the support member 51 are rotatable between a vertically upward direction and a horizontal direction by a stopper (not shown). Further, the other end of the plate member 55 is rotatably provided at the lower end portion of the plate member 53.

  As shown in FIG. 7, the fall prevention facility 60 includes panels 61 provided on the front, rear, left and right of the work floor 32 and sheets 62 provided on the corners thereof.

  The panel 61 is a plate member made of metal (for example, aluminum). One end of the panel 61 is provided on the single pipe 31 of the work scaffold 30 so as to be rotatable about the axis of the single pipe 31. Thereby, the other end of the panel 61 can move (bounce and store) between the work scaffold 30 and the vertical surface (side wall 23) of the elevator shaft EVS. Note that the amount of the panel 61 protruding toward the side wall 23 can be adjusted by a chain or a wire (not shown).

  The sheet 62 plays a role in preventing the fall of asbestos or the like that is spread and processed as shown in the upper diagram of FIG. 7 when the panel 61 is ejected to the elevator shaft EVS side. On the other hand, when the panel 61 is stored on the work scaffold 30 side, it is stored between adjacent panels 61 as shown in the lower diagram of FIG.

  8A to 8C are explanatory diagrams of operations of the folding scaffold 50 and the fall prevention equipment 60. FIG. 8A shows a state when the elevator car 10 (in other words, the work platform 30) is raised and lowered, and FIG. 8C shows a state when the work platform 30 is stopped. FIG. 8B shows the state between FIG. 8A and FIG. 8C.

  When the elevator car 10 is raised and lowered, as shown in FIG. 8A, both the folding scaffold 50 and the fall prevention equipment 60 are accommodated on the work scaffold 30 side. In this case, the wall portion of the work scaffold 30 is configured by the plate material 53 and the plate material 55 of the folding scaffold 50 and the panel 61 of the fall prevention equipment 60. Thereby, the worker on the work scaffold 30 can be prevented from falling, and safety can be improved. In order to prevent the upper end of the folding scaffold 50 from colliding with the ceiling portion 26, the height indicated by hs in this drawing needs to be H1-H2 (0.5 m in the present embodiment) or less.

  On the other hand, when the elevator car 10 is stopped (in other words, when asbestos processing is performed), as shown in FIG. 8C, the folding scaffold 50 and the fall prevention device 60 are both vertical surfaces (sidewalls 23) of the elevator shaft EVS. ) Is bounced to the side.

  By causing the folding scaffold 50 to jump out toward the side wall 23, the plate material 55 can be used as a scaffold, and the work space can be widened. Therefore, work efficiency can be improved. In this case as well, the side wall can be constituted by the plate material 53, and safety can be ensured.

  Moreover, the fall asbestos 60 (panel 61, sheet | seat 62) is made to jump toward the side wall 23 side, and it can prevent that the removed asbestos falls under the elevator shaft EVS. Further, the removed asbestos can be collected and placed on the lower work floor 32. As described above, an asbestos storage space can be created in the work scaffold 30, so that it is not necessary to raise and lower the elevator car 10 many times, and the construction period can be shortened and work efficiency can be improved. Moreover, it can prevent that an operator falls from the work scaffold 30 with the fall prevention equipment 60, and can improve safety | security.

  In the present embodiment, the plate material 53, the plate material 55, and the panel 61 are aluminum plate-like members, but may be other than this. For example, a metal other than aluminum may be used. Moreover, materials other than a metal may be sufficient. However, since it is provided on the elevator car 10, it is desirable that it is a lightweight and high-incombustibility material.

  The panel 61 may be a sheet or a net. The sheet 62 may be other than a sheet, for example, a net.

  Further, either one of the folding scaffold 50 and the fall prevention facility 60 may be provided. Moreover, you may make it provide only the part of the board | plate material 55 of the foldable scaffold 50 (that is, you may provide only the part of a scaffold so that rotation is possible).

  Also in the third embodiment, since the work scaffold 30 is provided on the upper part of the elevator car 10 so as to have the height H2, asbestos in the elevator shaft EVS can be reliably processed. In the third embodiment, since the folding scaffold 50 and the fall prevention facility 60 are provided, it is possible to improve the efficiency of asbestos processing.

  In addition, you may further provide the guide member 40 of 2nd Embodiment. In this case, stability can be further improved.

=== About Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

<About the elevator EV>
In the above-described embodiment, the elevator EV is a “rope type” in which the elevator car 10 and the counterweight W are suspended at both ends of the rope R and lifted by the hoisting machine 19, but is not limited thereto. For example, a “hydraulic type” elevator that does not use the counterweight W may be used.

  In the above-described embodiment, the elevator EV is provided from the ground (from the first floor), but is not limited thereto. For example, it may be provided from underground. That is, the floor 28 may be underground.

<About work scaffold 30>
In the above-described embodiment, the work scaffold 30 is configured in two steps (two work floors 32) in the vertical direction, but is not limited thereto. For example, it may be one stage or three or more stages. However, the larger the number of stages, the wider the area of the storage place for processed asbestos and the like.

DESCRIPTION OF SYMBOLS 10 Elevator car 19 Winding machine 23 Side wall 24 Opening / closing door 26 Ceiling part 28 Floor part 30 Work scaffold 31 Single pipe 32 Work floor 32a, 32b, 32c Fabric board 33 Skirting board 34 Trapping 40 Guide member 41 Support member 43 Rotating member 44 Fitting 50 Folding scaffold 51 Support member 53 Plate material 55 Plate material 60 Fall prevention equipment 61 Panel 62 Seat EV Elevator EVS Elevator shaft MR Machine room R Rope GR Guide rail W Counterweight

Claims (4)

The space in the elevator shaft in a building having a floor above the uppermost stop floor of the elevator car, the uppermost from the upper surface of the elevator car when the elevator car stops at the uppermost stop floor Measuring step of measuring the height to the ceiling of the space provided on the floor above the stop floor,
A working scaffold for treating deposits in the elevator shaft is lower than the height measured in the measuring step, and the working scaffold is disposed when the elevator car stops at the top stop floor. A work scaffold installation step in which the worker on the work floor is provided at the upper part of the elevator car at a height at which the deposits on the ceiling can be treated;
Have
The work scaffold installation method , wherein the work floor is an uppermost work floor among a plurality of work floors provided in the work scaffold. A work scaffold installation method according to claim 1,
A work platform installation method, further comprising a guide member installation step of providing a guide member for guiding the lift of the work platform at a position engageable with the lift guide rail of the elevator car. A work scaffold installation method according to claim 1 or 2,
The work scaffold installation method further comprising a jumping facility installation step of providing a jumping facility for jumping between the work scaffold and a side wall of the elevator shaft. A work scaffold installation method according to claim 3,
When the elevator car is stopped, the jumping device is ejected from the work platform to the side wall of the elevator shaft, and when the elevator car is raised or lowered, it is housed on the work platform side so that the wall portion of the work platform is removed. Configure,
A working scaffold installation method characterized by that.