JP2020020168A - Construction method of attached structure - Google Patents

Abstract

To provide a method for constructing an attached structure which can easily ensure safety when the attached structure is constructed.SOLUTION: The construction method of an accessory structure is a construction method for constructing an attached structure installed over a plurality of levels in the multi-story building 1, includes an assembling process for assembling at least a part of the attached structure at the target level among the multiple levels, a transportation process of transporting the attached structure before the assembling process is carried to a position corresponding to an installation space S, a forming process for forming an open ceiling opening 41 by removing a part of the corresponding floor part among a plurality of floors after the assembling process and the transportation process are performed, and an installation step of installing the attached structure in the installation space S by lifting and lowering the assembled accessory structure assembled in the assembling process through the open ceiling opening 41 formed in the forming process.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for constructing an accessory structure.

  2. Description of the Related Art Conventionally, as one of the techniques for providing stairs between stories in a multi-story building having a plurality of stories, in a multi-story building having a stairwell space (existing stairwell space) communicating an internal space of a plurality of stories, The stairs pre-assembled to the landing are transported to the atrium space (or the stairs are assembled after transporting the members of the stairs at the landing of the predetermined level), and the stairs are moved to the predetermined level using the lifting machine. A technique has been proposed in which the stairs are placed on a landing and a landing on an adjacent floor, and the placed stairs are fixed by stud bolts attached to these landings.

JP 2009-024449 A

  Here, in the above-mentioned conventional technique, the carrying work for carrying the stairs (or the members thereof) to the landing or the assembling work for assembling the stairs is performed in the vicinity of the atrium space. When the work is performed, the members of the stairs or the person may fall into the stairwell, and when the assembling work is performed, the spark generated when welding the members may drop into the stairwell. Therefore, there is room for improvement from the viewpoint of ensuring safety when constructing ancillary structures such as stairs.

  The present invention has been made in view of the above, and an object of the present invention is to provide a method for constructing an accessory structure, which can easily ensure safety when the accessory structure is constructed.

  In order to solve the above-mentioned problems and achieve the object, a method for constructing an attached structure according to claim 1 is a construction method for constructing an attached structure installed on a plurality of stories in a multi-story building. Performing an assembling step of assembling at least a part of the attached structure at a target layer in which the assembling work of the attached structure is to be performed among the plurality of layers; and performing an assembling step before or after the assembling step is performed. The transporting step of transporting the attached structure to the position corresponding to the installation space for installing the additional structure on the target floor, and after the assembling step and the transporting step are performed, the multi-story building is removed. A forming step of forming a blow-by opening by removing a part of the floor section corresponding to the installation space among a plurality of constituent floor sections, and the blow-through formed in the forming step By lifting the accessory structure as assembled in said assembling step through a mouth, comprising a placing step of placing the accessory structure to the installation space, the.

  The method for constructing an accessory structure according to claim 2 is the method for constructing an accessory structure according to claim 1, wherein, in the transporting step, the accessory structure before the assembling step is performed on the target layer. It is transported to a position corresponding to the installation space, and in the assembling step, at least a part of the attached structure transported in the transporting step is assembled.

  A method for constructing an accessory structure according to claim 3 is the method for constructing an accessory structure according to claim 1 or 2, wherein the plurality of accessory structures are constructed in the multi-story building. The plurality of layers include the plurality of target layers, and in the assembling step, assembling the attached structure at each of the plurality of target layers, and in the transporting step, before or after the assembling step is performed. Conveying the attached structure after the step has been performed to each of the plurality of target stories, and in the forming step, by removing a part of the floor corresponding to each of the plurality of target stories, The accessory structure formed in a plurality of the through-holes, and assembled in each of the plurality of target levels through the through-holes corresponding to each of the plurality of target levels in the installation step The After each moved up and down, placed respectively the accessory structure to the installation space.

  According to a fourth aspect of the present invention, in the method for constructing an attached structure according to any one of the first to third aspects, the attached structure includes a stair.

  According to the construction method of the attached structure according to claim 1, after the assembly step and the transportation step are performed, a part of the floor part corresponding to the installation space is removed from the plurality of floor parts constituting the multi-story building. Then, the auxiliary structure assembled in the assembling process is moved up and down through the forming step of forming the blow-by opening and the blow-through opening formed in the forming step, thereby installing the auxiliary structure in the installation space. Installation process, so that compared to the conventional technology (technique of installing the stairs of each story in the existing atrium space), for example, members or persons of the attached structure in the assembling process or the transportation process may blow through. It is possible to suppress falling to the lower level through the opening, and the spark (or smoke) generated when welding the members of the attached structure during the assembly work is blown through the lower level through the opening. To It can be suppressed to below. Therefore, the safety of human work and the fire safety of the multi-story building can be improved during the assembling process and the transporting process, and it is easy to secure the safety when constructing the attached structure.

  According to the construction method of the attached structure according to claim 2, in the carrying step, the attached structure before the assembling step is carried to a position corresponding to the installation space in the target hierarchy, and in the assembling step, the carrying step is carried out. Assemble at least a part of the attached structure transported in the above, so as to assemble the attached structure in the target layer, for example, compared with assembling the accessory structure in a position that does not correspond to the installation space in the target layer The work of transporting to a position corresponding to the above (so-called horizontal pulling work) can be omitted, and the construction of the attached structure can be performed efficiently.

  According to the method for constructing an attached structure according to claim 3, the attached structure is assembled at each of the plurality of target layers in the assembling process, and the assembling process is performed before or during the assembling process in the transporting process. The subsequent attached structure is transported to each of the plurality of target levels, and in the forming step, a plurality of blow-through openings are formed by removing a part of the floor corresponding to each of the plurality of target levels, and in the installation step. After raising and lowering each of the attached structures assembled at each of the plurality of target layers through the atrium opening corresponding to each of the plurality of target layers, the attached structures are respectively installed in the installation space. Each of the transporting and assembling operations of the attached structures can be performed in parallel, and a part of the transporting operation of the plurality of attached structures depends on the progress of the other partial transporting operation of the attached structures. To Avoiding the door, it can be carried out assembly process and transport processes efficiently.

  According to the construction method of the attached structure according to claim 4, since the attached structure includes the stairs, the members of the stairs at the time of the assembling process or the transporting process fall to the lower level through the blow-through opening. When the stairs are constructed, the spark (or smoke) generated when the members of the stairs are welded to each other when the assembling work is performed can be suppressed from dropping to the lower level through the blow-through opening. It is easier to ensure the safety of

1 is a perspective view conceptually showing a multi-story building according to an embodiment of the present invention (partially omitted). It is a side view which shows the preparation process of an execution method (some illustration is omitted). It is a side view which shows the conveyance process of a construction method (some illustration is omitted). It is a side view which shows the assembly process of a construction method (some illustration is omitted). It is a side view which shows the formation process of a construction method (some illustration is omitted). It is a side view which shows the installation process of a construction method (some illustration is omitted).

  An embodiment of a method for installing an attached structure according to the present invention will be described below in detail with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be described, then the specific contents of the [II] embodiment will be described, and finally, a modification to the [III] embodiment will be described. However, the present invention is not limited by the embodiments.

[I] Basic Concept of Embodiment First, a basic concept of the embodiment will be described. Embodiments relate generally to a construction method for constructing ancillary structures installed over a plurality of stories in a multistory building. Here, the specific structure and type of “multi-story building” are arbitrary, and include, for example, detached houses, apartments such as apartments and condominiums, office buildings, and buildings such as commercial facilities. The form is described as an office building under renovation. Further, the “attached structure” is, for example, a structure attached to a multi-story building, and is a concept including, for example, a stair, an escalator, and the like. ).

[II] Specific Contents of Embodiment Next, specific contents of the embodiment will be described.

(Configuration-Multi-story building)
First, the configuration of the multi-story building according to the embodiment will be described. FIG. 1 is a perspective view conceptually showing a multi-story building according to an embodiment of the present invention (partially omitted). In the following description, the X direction in FIG. 1 is the horizontal direction of the multi-story building (the −X direction is the left direction of the multi-story building, the + X direction is the right direction of the multi-story building), and the Y direction in FIG. The direction is the front direction of the multi-story building, the -Y direction is the rear direction of the multi-story building, the Z direction in FIG. 1 is the vertical direction of the multi-story building (+ Z direction is the upper direction of the multi-story building, and the -Z direction is the lower direction of the multi-story building). Called.

  The multi-story building 1 is a building having a plurality of levels (four levels in the embodiment). The multi-story building 1 is configured by using, for example, a known multi-story building (for example, a multi-story building made of concrete or the like), and as shown in FIG. From the first floor to the fourth floor 24 (illustration of the first floor is omitted), from the first beam 31 to the fourth beam 34, from the first wall to the fourth wall (not shown), from the first column A fourth pillar (not shown), a first attached structure 51, a second attached structure 52, and a third attached structure (not shown) are provided.

(Structure-Multi-story building-Ceiling)
The ceiling part 10 is a ceiling constituting the multi-story building 1, and is configured using, for example, a well-known concrete ceiling material or the like, and is provided at the upper end of the multi-story building 1 as shown in FIG.

(Configuration-Multi-story building-1st floor to 4th floor)
The first to fourth floors 24 are floors constituting the multi-story building 1, and use, for example, known concrete floor materials (for example, spun cleats, cellular concrete panels (ALC panels), and reinforced concrete panels). As shown in FIG. 1, they are arranged side by side in the vertical direction with a space therebetween. Specifically, the first to fourth floor portions 24 are arranged side by side from the bottom to the top in the order of the first to fourth floor portions 24. In the following description, among the stories of the multi-story building 1, a story (not shown) located between the first floor part and the second floor part 22 is referred to as a “first story”, and the second floor part 22 is referred to as “first floor”. The floor 1a located between the third floor 23 and the third floor 23 is referred to as a “second floor 1a”, and the floor 1b located between the third floor 23 and the fourth floor 24 is referred to as a “third floor”. 1b ", and the story 1c located between the fourth floor 24 and the ceiling 10 is called" fourth story 1c ".

(Configuration-Multi-story building-1st to 4th beams)
The first beam portion 31 to the fourth beam portion 34 are beams that support the second floor portion 22 to the fourth floor portion 24 and the ceiling portion 10, and are, for example, a known steel beam (or a known concrete beam). (Beam members), and are provided on the corresponding floors, respectively. Specifically, as shown in FIG. 1, a plurality of first beam portions 31 are provided so as to contact the lower surface of the second floor portion 22, and the second beam portions 32 contact the lower surface of the third floor portion 23. A plurality of third beam portions 33 are provided so as to contact the lower surface of the fourth floor portion 24, and a plurality of fourth beam portions 34 are provided so as to contact the lower surface of the ceiling portion 10.

(Configuration-Multi-story building-1st to 4th walls)
The first to fourth walls are walls constituting the multi-story building 1, and are formed using, for example, a known concrete wall material, and are provided at corresponding levels. Specifically, as shown in FIG. 1, a plurality of first wall portions are provided on the first floor, a plurality of second wall portions are provided on the second floor 1a, and a plurality of third wall portions are provided on the third floor 1b. The plurality of fourth wall portions are provided on the fourth story 1c.

(Configuration-Multi-story building-1st to 4th pillars)
The first to fourth pillar portions are pillars that constitute the multi-story building 1, and are configured using, for example, a well-known concrete pillar material, and are provided at corresponding levels. Specifically, as shown in FIG. 1, the first pillar is provided on the first floor, the second pillar is provided on the second floor 1a, the third pillar is provided on the third floor 1b, The fourth pillar is provided on the fourth floor 1c.

(Configuration-Multi-story building-Other configurations)
Further, as shown in FIG. 1, a blow-through opening 41 is provided in each of the second floor portion 22, the third floor portion 23, and the fourth floor portion 24. The opening 41 is an opening for communicating the internal space of each of the first floor to the fourth floor 1c, and is formed in a rectangular shape that is long in the left-right direction. The portion 23 and the fourth floor portion 24 are disposed at portions corresponding to the respective installation spaces S. Here, the “installation space S” means a space where an accessory structure is installed in a target hierarchy described later.

  Further, as shown in FIG. 1, a support portion 42 is provided on each of the first level, the second level 1a, and the third level 1b. The support part 42 is a support means for supporting the first attached structure 51, the second attached structure 52, or the third attached structure. The support portion 42 is located near the landing portions 62a and 62b of the first and second step structures 60a and 60b of the first and second accessory structures 51, 52 and 60, respectively. And a contact portion 43 and support portions 44a and 44b.

  The contact portion 43 contacts the landing portions 62a and 62b of the first step portion 60a and the second step portion 60b described later. The contact portion 43 is made of, for example, a long steel beam, and is provided so that the longitudinal direction of the contact portion 43 extends in the front-rear direction as shown in FIG. It is provided at a position where it can come into contact with the landing portions 62a, 62b of the first step portion 60a and the second step portion 60b. The support portions 44a and 44b support the contact portion 43. These support portions 44a and 44b are configured by using, for example, long steel pillar materials, and as shown in FIG. 1, a first floor portion (specifically, a multilayer (not shown) of the first floor portion). The second floor 22 (specifically, the part corresponding to the first beam 31 of the second floor 22), and the third floor 23 (specifically, the part corresponding to the foundation of the building 1). , The portion corresponding to the second beam portion 32 of the third floor portion 23), and is spaced apart from each other in the front-rear direction so as to sandwich the corresponding contact portion 43. Are installed side by side. Specifically, each of the first-layer strut portions 44a and 44b is connected to the base portion by a fixture or the like, and is connected to the contact portion 43 by a fixture or welding or the like. . Each of the pillar portions 44a and 44b of the second story 1a is connected to the first beam portion 31 by a fixing tool or welding or the like, and is connected to the contact portion 43 by a fixing tool or welding or the like. Have been. In addition, each of the pillar portions 44a and 44b of the third story 1b is connected to the second beam portion 32 by a fixing tool or welding or the like, and is connected to the contact portion 43 by a fixing tool or welding or the like. Have been.

(Structure-multi-story building-first attached structure, second attached structure, third attached structure)
The first attached structure 51 is a structure attached (installed) to the third floor 1b, the second attached structure 52 is a structure attached to the second floor 1a, and the third attached structure is a third attached structure. It is a structure attached to one level. However, since the configurations of the first auxiliary structure 51, the second auxiliary structure 52, and the third auxiliary structure are substantially the same, only the configuration of the first auxiliary structure 51 will be described below.

  The first attached structure 51 is configured using, for example, a known stair (for example, a steel stair or the like), and is provided in the installation space S of the third story 1b as shown in FIG. It has a first step portion 60a, a second step portion 60b, a step plate portion 70, and a handrail portion 80.

(Structure-multi-story building-first attached structure, second attached structure, third attached structure-first staircase, second staircase)
The first step portion 60a and the second step portion 60b are a basic structure of the first attached structure 51. The first step portion 60a and the second step portion 60b are configured using, for example, a known steel sasalar girder, and are provided in the installation space S of the third story 1b as shown in FIG. Specifically, the first staircase 60a is arranged on the front side of the installation space S, and the second staircase 60b is arranged on the rear side of the installation space S. In addition, each of the first step portion 60a and the second step portion 60b includes a step portion main body 61a, 61b, and landing portions 62a, 62b.

(Structure-multi-story building-first attached structure, second attached structure, third attached structure-first staircase, second staircase-staircase body)
The step body 61a, 61b is a basic structure of the first step 60a or the second step 60b. These stepped portion main bodies 61a and 61b are formed of long steel plate-like bodies, and as shown in FIG. 1, are arranged side by side in the front-rear direction with an interval therebetween. The stair portion main body 61a is provided on the front side of the stair portion main body 61b.

  Further, the specific shape and size of the staircase portion main bodies 61a and 61b are arbitrary, but are set as follows in the embodiment. That is, first, the front shapes of the staircase main bodies 61a and 61b are set to be inclined in the vertical direction. Specifically, the front shapes of the step main bodies 61a and 61b of the first step 60a are set to be inclined so as to be inclined upward from the right side to the left side. Further, the front shape of the step main bodies 61a, 61b of the second step 60b is set to be inclined so as to be upward from the left side to the right side. Further, the length of the staircase body 61a, 61b in the left-right direction is set shorter than the length of the stairwell 41 in the left-right direction. In addition, the vertical length of the staircase body 61a, 61b is set to about half the vertical length of the third story 1b. Further, the thickness (length in the front-rear direction) of the staircase body 61a, 61b is set to a length capable of obtaining a desired load-bearing capacity.

  Further, the specific configuration of the staircase body 61a, 61b is arbitrary, but in the embodiment, as shown in FIG. 1, the staircase body 61a, 61b is provided with a mounting portion 63. . The mounting portion 63 is mounting means for mounting the step board portion 70, and is formed in a plurality by cutting out the upper end of each of the step main bodies 61a and 61b.

(Structure-multi-story building-first attached structure, second attached structure, third attached structure-staircase-landing)
The landing sections 62a and 62b are for forming a landing in the first step section 60a or the second step section 60b. These landing portions 62a and 62b are formed of, for example, a long plate-shaped body made of steel, and are arranged side by side in the front-rear direction at an interval as shown in FIG. In No. 1, the landing section 62a is provided on the front side of the landing section 62b). Specifically, the right end of the landing section 62a of the first step section 60a is connected to the upper part of the step section main body 61a of the first step section 60a, and the right end of the landing section 62b of the first step section 60a is the second step. It is connected to the upper part of the step part main body 61b of one step part 60a. The right end of the landing section 62a of the second step section 60b is connected to the lower portion of the second step section 60b, and the right end of the landing section 62b of the second step section 60b is connected to the step section main body 61b of the second step section 60b. Connected to the bottom.

  Further, the specific shape and size of the landing portions 62a and 62b are arbitrary, but are set as follows in the embodiment. That is, first, the front shapes of the landing portions 62a and 62b are set to be linear in the left-right direction. The length of the landing portions 62a, 62b in the left-right direction is set to be shorter than the length of the staircase portions 61a, 61b in the left-right direction. Further, the vertical length and the thickness (length in the front-rear direction) of the landing portions 62a and 62b are set to lengths capable of obtaining a desired load bearing capacity.

  The method of forming the first step portion 60a or the second step portion 60b is arbitrary. In the embodiment, the step portion main body 61a and the landing portion 62a are integrally formed by bending a steel plate or the like. The step body 61b and the landing section 62b are integrally formed. However, the present invention is not limited to this. For example, the stair portion main body 61a and the landing section 62a are formed separately by bending a steel plate or the like, and the stair section main body 61b and the landing section 62b are formed separately. The section main body 61a and the landing section 62a may be connected by welding or the like, and the stair section main body 61b and the landing section 62b may be connected by welding or the like (in this case, the stair section main body 61a or the stair section main body 61b is further It may be configured to be finely divided).

  The method of installing the first step portion 60a or the second step portion 60b is arbitrary, but in the embodiment, the first step portion 60a or the second step portion 60b is installed as follows. That is, as shown in FIG. 1, with respect to the first step portion 60 a, the lower portions of the step portion main bodies 61 a and 61 b are brought into contact with the second beam portion 32, and the lower ends of the landing portions 62 a and 62 b are connected to the support portion 42. The stair portion main bodies 61a and 61b are fixed to the second beam portion 32 by a fixing tool or welding or the like, and the landing portions 62a and 62b are brought into contact with the support portions 42. It is fixed to the portion 43 by a fixing tool or welding (for the first step portion 60a of the third attached structure, the lower portions of the step portion main bodies 61a, 61b are brought into contact with the base portion of the multi-story building 1). , And is fixed to the base with a fixing tool or the like) As for the second step portion 60b, the lower ends of the landing portions 62a and 62b are brought into contact with the contact portion 43 of the support portion 42, and the upper portions of the step main portions 61a and 61b are contacted with the third beam portion 33. The landing portions 62a and 62b are fixed to the contact portion 43 of the support portion 42 by a fixing tool or welding, and the staircase main bodies 61a and 61b are fixed to the fourth beam portion 34. Or, it is fixed by welding or the like.

(Structure-Multi-story building-1st attached structure, 2nd attached structure, 3rd attached structure-step board part)
The step board portion 70 is stepped on by the foot of the person in the first attached structure 51. The stepped plate portion 70 is formed of, for example, a flat plate-shaped body (specific, rectangular plate-shaped body) made of steel, and as shown in FIG. A plurality of staircase portions 60b are provided between the staircase portion main bodies 61a and 61b and between the landing portions 62a and 62b. Specifically, the fixtures are respectively mounted on the plurality of mounting portions 63 of the stair portion main bodies 61a, 61b of the first stair portion 60a and the second stair portion 60b, and fixed to the stair portion main bodies 61a, 61b. , Welding, or a fitting structure. Further, it is placed on the upper end of each of the landing sections 62a, 62b of the first step section 60a and the second step section 60b, and is fixed to the landing sections 62a, 62b by a fixing tool, welding, or a fitting structure. Have been.

(Structure-multi-story building-first attached structure, second attached structure, third attached structure-handrail)
The handrail portion 80 is for preventing the handrail portion 80 from falling down from the first attached structure 51 by being grasped by a person. The handrail portion 80 is configured using, for example, a known steel handrail for stairs, and is provided in each of the first step portion 60a and the second step portion 60b. Specifically, as shown in FIG. 1, it is provided upright at the upper end of the step body 61b of the first step 60a, and is connected to the step body 61b by a fixture or the like. Also, the staircase body 61a, 61b of the second staircase part 60b and the rear end of the upper end of the landing part 62b are erected and fixed to the staircase part body 61a, 61b and the landing part 62b by a fixing tool or the like. It is connected.

(How to install attached structures)
Next, a method of constructing the first attached structure 51, the second attached structure 52, and the third attached structure will be described. However, since the construction methods of the first attached structure 51, the second attached structure 52, and the third attached structure are substantially the same, only the construction method of the first attached structure 51 will be described below. . In addition, as a premise of the construction method of the first attached structure 51, a blow-through opening 41 provided in advance in each of the second floor portion 22, the third floor portion 23, and the fourth floor portion 24 includes the temporary floor portion 26 ( The description will be made assuming that the closed state (hereinafter, referred to as a "closed state") is closed by a concrete floor material or the like.

  FIG. 2 is a side view showing a preparation step of the construction method (partially omitted). FIG. 3 is a side view showing a transportation step of the construction method (partially omitted). FIG. 4 is a side view showing an assembling process of the construction method (partially omitted). FIG. 5 is a side view showing a forming step of the construction method (partially omitted). FIG. 6 is a side view showing an installation step of the construction method (partially omitted). As shown in FIGS. 1 to 6, the method of constructing the first attached structure 51 according to the embodiment includes a preparation step, a transportation step, an assembly step, a formation step, an installation step, and a finishing step.

(Attached structure construction method-preparation process)
First, the preparation process will be described. The preparation process is a process for preparing for the construction of the first attached structure 51.

  Specifically, as shown in FIG. 2, the support part 42, the temporary support part 90, the temporary receiving parts 100 a to 100 c, the temporary scaffold 110, and the chain block 112 are located near the installation space S on the third floor 1 b. Install.

  The temporary support portion 90 is temporary support means for supporting the second step portion 60b of the first attached structure 51. The temporary support portion 90 is configured, for example, substantially in the same manner as the support portion 42, and is provided near the right end of the installation space S of the third floor 1b, as shown in FIG. (Not shown).

  The temporary receiving beam portions 100a to 100c are beam portions for temporarily receiving the first step portion 60a or the second step portion 60b of the first attached structure 51 during the transportation process. The temporary receiving portions 100a to 100c are made of, for example, long steel beams, and are provided such that the longitudinal direction of the temporary receiving portions 100a to 100c extends in the front-rear direction. Specifically, as shown in FIG. 2, the temporary receiving portion 100 a is a portion corresponding to the temporary supporting portion 90 of the third floor portion 23 (specifically, a portion corresponding to the second beam portion 32 of the third floor portion 23). The temporary receiving portion 100b is placed on the upper surface of the corresponding portion, and the temporary receiving portion 100b corresponds to the portion corresponding to the support portion 42 of the third floor portion 23 (specifically, corresponds to the second beam portion 32 of the third floor portion 23). The temporary receiving portion 100c is mounted on the upper surface of the contact portion 43 of the support portion 42.

  Moreover, the temporary scaffold 110 is a scaffold used at the time of the work of the transporting process, the assembling process, the forming process, the setting process, or the finishing process, and is configured using, for example, a known steel temporary scaffold or the like, and is illustrated in FIG. As described above, it is provided near the temporary support portion 90 and is fixed to the third floor portion 23 by a fixing tool or the like. In the embodiment, as shown in FIG. 2, a fall prevention member 111 connected to the temporary scaffold 110 and the fourth floor portion 24, and a fall prevention member 111 for preventing the temporary scaffold 110 from falling. Is provided.

  Further, the chain block 112 is for raising and lowering at least a part of the components of the first accessory structure 51, the second accessory structure 52, or the third accessory structure in a setting step to a predetermined position. The chain block 112 is configured using a known chain block 112, and is attached to the fourth beam portion 34 located near the blow-through opening 41 of the fourth floor portion 24 (in FIG. 2, the chain block 112 is used). Are respectively attached to the two fourth beam portions 34).

(Attached structure construction method-transportation process)
Next, the transportation process will be described. In the transportation process, the first attached structure 51 before the assembly process is performed is moved to a position corresponding to the installation space S of the target level (here, the third level 1b) in which the assembly work of the first attached structure 51 is performed. This is the process of transporting. In the embodiment, the target hierarchy for performing the assembling work of the second attached structure 52 is described as the second hierarchy 1a, and the target hierarchy for performing the assembling work of the third attached structure is described as the first hierarchy ( That is, the multi-story building 1 includes a plurality of target stories).

  Specifically, first, the first attached structure 51 is pulled in from the outside of the multi-story building 1 through the window (not shown) of the multi-story building 1 using a known crane or the like (not shown). Next, the first stepped portion 60a and the second stepped portion 60b of the first attached structure 51 are transported to a position corresponding to the installation space S of the third story 1b by using a known carriage or the like (not shown). Then, as shown in FIG. 3, the first stepped portion 60a and the second stepped portion 60b are raised and lowered using a known chain block or the like (not shown), so that the first stepped portion 60a is temporarily supported by the temporary receiving beam portion 100a and the temporary support. The second stepped portion 60b is placed on the temporary receiving portion 100b and the temporary receiving portion 100c while being placed on the contact portion 91 of the portion 90.

  By such a transporting process, the transport operation can be performed with the blow-through openings 41 of the second floor portion 22, the third floor portion 23, and the fourth floor portion 24 in a closed state. When performing, the member or the person of the first attached structure 51 can be prevented from falling to the lower level via the blow-through opening 41 of the third floor portion 23. In addition, the first auxiliary structure 51, the second auxiliary structure 52, and the third auxiliary structure can be transported in parallel, and the first auxiliary structure 51, the second auxiliary structure 52, Alternatively, it is possible to prevent the transfer operation of a part of the third attached structure from being influenced by the progress of the transfer operation of the first attached structure 51, the second attached structure 52, or another part of the third attached structure. The transfer process can be performed efficiently.

(Attached structure construction method-assembly process)
Next, the assembly process will be described. The assembling step is a step of assembling at least a part of the first attached structure 51 on the third floor 1b after the transporting step.

  Specifically, as shown in FIG. 4, the step board portions 70 are respectively placed on the plurality of placement portions 63 in each of the first step portion 60a and the second step portion 60b of the first attachment structure 51, The placed step board portion 70 is fixed to the first step portion 60a and the second step portion 60b by a fixture, welding, a fitting structure, or the like.

  Through such an assembling process, the assembling work can be performed with the blow-through openings 41 of the second floor portion 22, the third floor portion 23, and the fourth floor portion 24 closed, so that when the assembling work is performed. It is possible to prevent a member (for example, the step board part 70 or the like) of the first attached structure 51 or a person from dropping to a lower level through the blow-through opening 41 of the third floor part 23 and to perform an assembling operation. It is possible to avoid sparks (or smoke) generated when the members are welded to each other through the blow-through opening 41 of the third floor portion 23 and fall to a lower level. In addition, the assembly work of each of the first attached structure 51, the second attached structure 52, and the third attached structure can be performed in parallel, and the first attached structure 51, the second attached structure 52, Alternatively, the assembling work of a part of the third attached structure is prevented from being affected by the progress of the assembling work of the first attached structure 51, the second attached structure 52, or another part of the third attached structure. The assembly process can be performed efficiently. In addition, since the first step portion 60a and the second step portion 60b are less likely to sway compared to the case where the step portion 70 is attached after the finishing process, the step portion 70 can be attached accurately. Further, since the fire management area for welding in the assembly work can be completed for each hierarchy, the number of fire managers can be easily reduced. Further, since the assembling process is performed after the transporting process, the first attached structure 51 after the assembly is compared with, for example, assembling the first attached structure 51 at a position in the third floor 23 that does not correspond to the installation space S. The work of transporting the 51 to the position corresponding to the installation space S in the third floor 23 (so-called horizontal pulling work) can be omitted, and the construction of the first attached structure 51 can be performed efficiently.

(Attachment structure construction method-formation process)
Next, the forming process will be described. The forming process is a process of forming the blow-through opening 41 by removing a floor portion corresponding to the installation space S among the plurality of floor portions 24 after the assembling process and the transporting process are performed.

  More specifically, as shown in FIG. 5, first, a temporary floor installed on each of the second floor 22, the third floor 23, and the fourth floor 24 using a known chain block (not shown) or the like. By removing (removing) the portion 26, the blow-through opening 41 is formed. Thereafter, the detached temporary floor portion 26 is transported to the outside of the multi-story building 1 using a known carriage (not shown).

(Attachment structure construction method-installation process)
Next, the installation process will be described. In the installation step, after the first attached structure 51 assembled in the assembling step is moved up and down through the blow-through opening 41 formed in the forming step, the first attached structure 51 is installed in the installation space S. It is a process.

  Specifically, as shown in FIG. 6, first, using the chain block 112, the first step portion 60 a and the second step portion 60 b of the first attached structure 51 to which the step plate portion 70 is attached in the assembling process. Are respectively raised and lowered to predetermined positions. Specifically, the first step portion 60a is lowered to a position where the first step portion 60a can be in contact with the contact portion 43 of the support portion 42 and the second beam portion 32, and the second step portion 60b is brought into contact with the support portion 42. It is raised to a position where it can come into contact with the part 43 and the third beam part 33. In this case, the temporary support portion 90 and the temporary receiving portions 100a to 100c are removed at an arbitrary timing after the first step portion 60a and the second step portion 60b are moved up and down. Next, the lowered first staircase portion 60a is fixed to the contact portion 43 of the support portion 42 and the second beam portion 32 by a fixing tool or welding, and the raised second staircase portion 60b is supported. It is fixed to the contact portion 43 and the third beam portion 33 by a fixture or welding.

  Further, as in the embodiment, a method of installing a plurality of accessory structures is optional, but, for example, using a chain block 112, a plurality of accessory structures may be positioned downward from an upper one of the plurality of accessory structures. May be installed in the order of the attached structures. As an example, first, the first auxiliary structure 51 is installed in the installation space S of the third level 1b, then the second auxiliary structure 52 is installed in the installation space S of the second level 1a, and finally, the third auxiliary structure 51 is installed. May be installed in the installation space S of the first hierarchy. In this case, for example, in the forming process, by forming only the blow-through openings 41 necessary for elevating and lowering the attached structure to be installed, compared to the case where all the blow-through openings 41 are formed at one time, Damage when a member of an attached structure or a person falls through the blow-through opening 41 during the work of the process can be reduced. However, the present invention is not limited to this, and may be installed in the order of the auxiliary structures located above from the lower auxiliary structures among the plurality of auxiliary structures, or may be installed in an irregular order.

(Attached structure construction method-finishing process)
Subsequently, the finishing step to be described in the finishing step is a step of finishing the first attached structure 51. Here, the term “finishing” is a concept that includes, for example, painting the first accessory structure 51, completely assembling the first accessory structure 51, or removing unnecessary equipment and the like.

  Specifically, by attaching the handrail portion 80 to each of the first step portion 60a and the second step portion 60b of the first attached structure 51, the first attached structure 51 is completely assembled. Further, the coating of the first attached structure 51 is performed by applying a paint to the first attached structure 51 using a known applicator (for example, a brush or the like) which is not shown, and then drying the coating at room temperature until a predetermined time has elapsed. I do. In addition, instruments such as the temporary scaffold 110 and the chain block 112 are removed. Thereby, the first accessory structure 51 shown in FIG. 1 can be constructed.

  According to the above-described construction method, for example, the first attached structure 51 or the second attached structure 51 during the assembling process or the transporting process is compared with the conventional technology (the technology of installing the stairs of each story in the existing atrium space). It is possible to prevent a member of the accessory structure 52 or a person from dropping to a lower level through the blow-through opening 41, and to weld members such as the first accessory structure 51 at the time of assembly work. The generated spark (or smoke) can be prevented from falling to the lower level through the blow-through opening 41. Therefore, the safety of human work and the fire safety of the multi-story building 1 can be improved during the assembling process and the transporting process, and the first attached structure 51, the second attached structure 52, and the third attached structure can be used. It is easier to ensure safety during construction. In addition, since each of the first attached structure 51, the second attached structure 52, and the third attached structure is a stair, a member of the stair at the time of the assembling process or the carrying process is lowered through the blow-through opening 41. And it is possible to prevent the spark (or smoke) generated when the members of the stairs are welded to each other during the assembling work from falling through the blow-through opening 41 to the lower level. It is possible to secure safety when constructing stairs.

(Effects of Embodiment)
As described above, according to the first embodiment, after the assembly process and the transportation process are performed, by removing a part of the floor corresponding to the installation space S among the plurality of floors configuring the multi-story building 1. Forming a through hole 41, a first auxiliary structure 51, a second auxiliary structure 52, and a third auxiliary structure assembled in an assembling process through the blow through opening 41 formed in the forming step. The first attachment structure 51, the second attachment structure 52, and the third attachment structure in the installation space S by raising and lowering the first attachment structure 51. For example, as compared with the technique of installing a staircase portion of a story), for example, the members of the first accessory structure 51 or the second accessory structure 52 during the assembling process or the transporting process, or a person passing through the through-hole 41, Fall to the level of And the spark (or smoke) generated when the members of the first accessory structure 51 or the second accessory structure 52 are welded to each other when the assembling work is performed is performed through the blow-through opening 41 to a lower level. Can be suppressed. Therefore, the safety of human work and the fire safety of the multi-story building 1 can be improved during the assembling process and the transporting process, and the first attached structure 51, the second attached structure 52, and the third attached structure can be used. It is easier to ensure safety during construction.

  In the transporting process, the first attached structure 51, the second attached structure 52, and the third attached structure before the assembling process are transported to a position corresponding to the installation space S in the target hierarchy, and the assembling process is performed. In, at least a part of each of the first accessory structure 51, the second accessory structure 52, and the third accessory structure transported in the transporting process is assembled, and thus, for example, the first accessory structure 51, the second accessory Compared to the case where the first accessory structure 51, the second accessory structure 52, and the third accessory structure are assembled at a position that does not correspond to the installation space S among the structure 52 and the third accessory structure, the assembled structure is more suitable. The work of transporting the first attached structure 51, the second attached structure 52, and the third attached structure to a position corresponding to the installation space S in the target hierarchy (so-called horizontal pulling operation) can be omitted, and the first attached structure can be omitted. 51, second attached structure Construction of the object 52, and the third accessory structure can be carried out efficiently.

  Also, in the assembling process, the first accessory structure 51, the second accessory structure 52, and the third accessory structure are assembled at each of the plurality of target layers, and in the transporting process, before the assembly process is performed or during the assembly process. The first attached structure 51, the second attached structure 52, and the third attached structure that have been performed are transported to each of the plurality of target stories, and the floor corresponding to each of the plurality of target stories is formed in the forming process. By removing a part of the part, a plurality of stairwell openings 41 are formed, and in the installation process, the first attachments assembled at each of the plurality of target layers through the stairwell openings 41 corresponding to each of the plurality of target layers After raising and lowering the structure 51, the second attachment structure 52, and the third attachment structure, respectively, the first attachment structure 51, the second attachment structure 52, and the third attachment structure are respectively placed in the installation space S. Since it will be installed, Each of the first attachment structure 51, the second attachment structure 52, and the third attachment structure can be transported and assembled in parallel, and the first attachment structure 51, the second attachment structure 52, Alternatively, it is possible to prevent the transfer operation of a part of the third attached structure from being influenced by the progress of the transfer operation of the first attached structure 51, the second attached structure 52, or another part of the third attached structure. As a result, the assembling process and the transporting process can be performed efficiently.

  In addition, since each of the first accessory structure 51, the second accessory structure 52, and the third accessory structure includes a stair, a member of the stair at the time of the assembling process or the carrying process is lowered through the blow-through opening 41. And it is possible to prevent the spark (or smoke) generated when the members of the stairs are welded to each other during the assembling work from falling through the blow-through opening 41 to the lower level. It is possible to secure safety when constructing stairs.

[III] Modifications to the Embodiments The embodiments of the present invention have been described above, but specific configurations and means of the present invention may be embraced within the scope of the technical idea of each invention described in the claims. , Can be arbitrarily modified and improved. Hereinafter, such modified examples will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the contents described above. According to the present invention, it is possible to solve the problems not described above or to obtain the effects not described above. In some cases, only some of the described problems may be solved or only some of the described effects may be achieved.

(About shape, numerical value, structure, time series)
Regarding the components exemplified in the embodiment and the drawings, the shape, numerical values, or the structure or chronological relationship of a plurality of components may be arbitrarily modified and improved within the technical idea of the present invention. Can be.

(About attached structures)
In the above-described embodiment, the type of the staircase of the attached structure is described as a folded staircase, but is not limited thereto, and may be, for example, a straight staircase, a winding staircase, or a spiral staircase.

  Further, in the above-described embodiment, the number of attached structures is three, but the present invention is not limited to this. For example, when ancillary structures are installed in other layers (for example, the fourth floor 1c, etc.) other than the first to third layers 1b among the layers of the multi-story building 1, the number of attached structures is reduced. There may be four or more. Alternatively, the number of attached structures may be only one.

  Further, in the above-described embodiment, each of the first stair portion 60a and the second stair portion 60b integrally forms the stair portion main body 61a and the landing portion 62a, and also integrally forms the stair portion main portion 61b and the landing portion 62b. However, the invention is not limited to this. For example, the staircase body 61a and the landing section 62a are formed separately, and the staircase body 61b and the landing section 62b are formed separately. May be done. In this case, the transporting process and the assembling process of the method of constructing the first attached structure 51 may be performed as follows. That is, in the transportation step, the first attached structure 51 drawn into the multi-story building 1 is transported to a position corresponding to the installation space S on the third floor 1b. In the assembling process, first, the stair portion main body 61a and the landing portion 62a are connected by welding or the like, and the stair portion main portion 61b and the landing portion 62b are connected by welding or the like, so that the first step portion 60a and the second The step part 60b is constituted. Next, the first stepped portion 60a and the second stepped portion 60b are raised and lowered using a chain block or the like, so that the first stepped portion 60a is placed on the temporary receiving portion 100a and the contact portion 91 of the temporary support portion 90. At the same time, the second step portion 60b is placed on the temporary receiving portions 100b and 100c. Then, the step board part 70 is attached to the plurality of mounting parts 63 in each of the first step part 60a and the second step part 60b.

(About construction method)
In the above-described embodiment, it has been described that the preparation step and the finishing step are performed, but the present invention is not limited to this. For example, when it is not necessary to install the support portion 42, the temporary support portion 90, the temporary receiving portions 100a to 100c, and the temporary scaffold 110, the preparation step may be omitted. In the case where the first accessory structure 51, the second accessory structure 52, and the third accessory structure do not need to be coated, the finishing step may be omitted.

  Further, in the above-described embodiment, it has been described that the assembling process is performed after the transporting process, but this is not a limitation. For example, the assembly process may be performed before the transportation process. As an example, in the assembling process, the first step portion 60a and the second step portion 60b of the first attached structure 51 drawn from the outside of the multi-story building 1 to the inside are moved from a position corresponding to the installation space S of the third floor 1b. It is transported to a slightly distant position, and the step board 70 is attached to the first step 60a and the second step 60b at the position. Then, in the transporting step, the first step portion 60a and the second step portion 60b to which the step board portion 70 is attached may be transported to a position corresponding to the installation space S of the third floor 1b (the second step). The same applies to the accessory structure 52 and the third accessory structure.)

  Further, in the above embodiment, in the finishing process, the handrail portion 80 is attached to each of the first attached structure 51, the second attached structure 52, and the third attached structure. However, the present invention is not limited to this. For example, in the assembling process, the handrail portion 80 may be attached to each of the first attached structure 51, the second attached structure 52, and the third attached structure.

(Note)
The method for constructing an accessory structure according to Supplementary Note 1 is a method for constructing an accessory structure installed over a plurality of levels in a multi-story building, and performing an assembling operation of the accessory structure among the plurality of levels. An assembling step of assembling at least a part of the attached structure at a target target layer; and the accessory structure at the target layer before the assembling step is performed or after the assembling step is performed. A transporting step of transporting to a position corresponding to the installation space where the installation space is to be installed, and after the assembling step and the transportation step have been performed, of the floor section corresponding to the installation space among the plurality of floor sections constituting the multi-story building Forming a blow-by opening by removing a part thereof; and the assembling in the assembling process through the blow-through opening formed in the forming process. By raising and lowering the structure comprises an installation step of installing the accessory structure to the installation space, the.

  The method for constructing an accessory structure according to Supplementary Note 2 is the method for constructing an accessory structure according to Supplementary Note 1, wherein, in the transporting step, the accessory structure before the assembling step is performed in the installation space in the target hierarchy. It is transported to a corresponding position, and in the assembling step, at least a part of the attached structure transported in the transporting step is assembled.

  The method for constructing an accessory structure according to Supplementary Note 3 is the method for constructing an accessory structure according to Supplementary Note 1 or 2, wherein the method is for constructing a plurality of the accessory structures in the multi-story building. Includes a plurality of the target layers, in the assembling step, assembling the attached structure at each of the plurality of target layers, and in the transporting step, before the assembling step is performed or the assembling step is performed. Transporting the attached structure after the above to each of the plurality of target floors, and removing the part of the floor corresponding to each of the plurality of target floors in the forming step, thereby opening the blow-through opening. Forming a plurality of the auxiliary structures assembled in each of the plurality of target layers through the atrium opening corresponding to each of the plurality of target layers in the installation step; After allowed lifting is, placed respectively the accessory structure to the installation space.

  The construction method of the accessory structure according to Supplementary Note 4 is the construction method of the accessory structure according to any one of Supplementary Notes 1 to 3, wherein the accessory structure includes a stair.

(Effect of additional notes)
According to the construction method of the attached structure described in Supplementary Note 1, after the assembling process and the transporting process are performed, a part of the floor corresponding to the installation space is removed from the plurality of floors configuring the multi-story building. Thereby, the installation step of forming the blow-through opening, and the installation in which the auxiliary structure assembled in the assembling process is moved up and down through the blow-through opening formed in the formation step, thereby installing the auxiliary structure in the installation space. And, compared with the conventional technology (technique of installing the stairs of each story in the existing atrium space), for example, the members of the attached structure or the person at the time of the assembling process or the transporting process can be opened through the opening. Can be suppressed from dropping to the lower level through the opening, and the spark (or smoke) generated when the members of the attached structure are welded to each other at the time of the assembling operation is reduced to the lower level through the blow-through opening. Drop That it can be suppressed. Therefore, the safety of human work and the fire safety of the multi-story building can be improved during the assembling process and the transporting process, and it is easy to secure the safety when constructing the attached structure.

  According to the method for constructing an accessory structure described in Supplementary Note 2, in the transport process, the accessory structure before the assembly process is performed is transported to a position corresponding to the installation space in the target hierarchy, and in the assembly process, the transport process is performed. Since at least a part of the attached structure transported is assembled, compared to, for example, assembling the attached structure at a position in the target hierarchy that does not correspond to the installation space, the assembled auxiliary structure is placed in the installation space in the target hierarchy. The work of transporting to the corresponding position (so-called horizontal pulling work) can be omitted, and the construction of the attached structure can be performed efficiently.

  According to the construction method of the accessory structure described in Supplementary Note 3, in the assembly process, the accessory structure is assembled at each of the plurality of target layers, and in the transport process, before or after the assembly process is performed. In the forming step, by removing a part of the floor corresponding to each of the plurality of target levels, a plurality of blow-through openings are formed, and in the installation step, After ascending and descending the attached structures assembled at each of the plurality of target layers through the atrium opening corresponding to each of the plurality of target layers, the attached structures are respectively installed in the installation space. The transporting and assembling operations of each of the structures can be performed in parallel, and a part of the plurality of attached structures is dependent on a progress of another part of the plurality of attached structures. This The can be avoided, it is possible to carry out the assembly process and transport processes efficiently.

  According to the construction method of the accessory structure described in Supplementary Note 4, since the accessory structure includes the stairs, the member of the stairs in the assembling process or the transporting process may drop to the lower level through the blow-through opening. In addition to being able to suppress the spark (or smoke) generated when welding the members of the stairs when the assembling work is performed, it is possible to suppress the spark (or smoke) from falling down to the lower level through the blow-through opening, and when constructing the stairs It is easier to ensure safety.

DESCRIPTION OF SYMBOLS 1 Multi-story building 1a 2nd floor 1b 3rd floor 1c 4th floor 10 Ceiling part 22 Second floor part 23 Third floor part 24 Fourth floor part 26 Temporary floor part 31 First beam part 32 Second beam part 33 Third Beam part 34 Fourth beam part 41 Blow-through opening 42 Support part 43 Contact part 44a, 44b Support part 51 First attached structure 52 Second attached structure 60a First step part 60b Second step part 61a, 61b Step part main body 62a, 62b Landing section 63 Placement section 70 Step board section 80 Handrail section 90 Temporary support section 91 Contact section 100a, 100b, 100c Temporary beam section 110 Temporary scaffold 111 Fall prevention material 112 Chain block S Installation space

Claims (4)

A construction method for constructing an attached structure installed over a plurality of levels in a multi-story building,
An assembling step of assembling at least a part of the attached structure at a target layer in which the assembling work of the attached structure is performed among the plurality of layers;
A transporting step of transporting the accessory structure before the assembly step is performed or after the assembly step is performed to a position corresponding to an installation space for installing the accessory structure on the target layer,
After the assembling step and the carrying step are performed, by removing a part of the floor part corresponding to the installation space among the plurality of floor parts constituting the multi-story building, a forming step of forming a blow-through opening; ,
An installation step of installing the accessory structure in the installation space by raising and lowering the accessory structure assembled in the assembly step through the blow-through opening formed in the formation step,
Construction method of attached structure including. In the transporting step, transporting the attached structure before the assembling step is performed to a position corresponding to the installation space in the target hierarchy,
In the assembling step, assembling at least a part of the accessory structure transported in the transporting step,
The construction method of the attached structure according to claim 1. The construction method for constructing a plurality of the attached structures in the multi-story building,
The plurality of layers include a plurality of the target layers,
In the assembling step, assembling the accessory structure at each of the plurality of target layers,
In the transporting step, transporting the attached structure before the assembling step is performed or after the assembling step is performed to each of the plurality of target layers,
In the forming step, a plurality of the blow-through openings are formed by removing a part of the floor portion corresponding to each of the plurality of target stories,
In the setting step, after each of the attached structures assembled at each of the plurality of target layers is moved up and down through the atrium opening corresponding to each of the plurality of target layers, the attached structure is installed. Installed in the space,
A method for constructing an attached structure according to claim 1. The accessory structure includes a staircase;
A method for constructing an accessory structure according to any one of claims 1 to 3.

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