JP2006083691A - Barrier-free extension structure of existing apartment house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apartment house realizing a barrier-free state by extending a skeleton-infill unit integrating kitchen and sanitary facilities. <P>SOLUTION: Extension units 15 each integrating a precast concrete skeleton 11 and infills equipped with kitchen and sanitary facilities 21, 22, 23 independently in the skeleton, are stacked and connected in proximity to the external wall surfaces of dwelling units 50A, 50A adjoining with a staircase 51 of an existing residential building 50 held between, in accordance with the floor height of the respective dwelling units 50A of the existing residential building while leaving a staircase 51 as it is, so as to form communicating passages 13 communicating with openings formed on the dwelling unit 50A side. Further, a slab of a common floor 19 having an entrance of an elevator facility 31 is laid between the extension units 15 of the adjoining dwelling units 50A, and a vestibule 14 provided at the extension unit 15 can be accessed by ascending/descending using the elevator facility 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a barrier-free extension structure of an existing apartment house, and an infill equipped with a new independent water supply facility considering barrier-free construction without constructing a staircase of an existing apartment house of a medium to low-rise type having a staircase room. In order to speed up and increase the efficiency of extension work considering barrier-free by building an extension structure part by sequentially stacking skeletons inside the building, and incorporating an elevator unit into the assembled extension structure part The barrier-free extension structure of the existing apartment house.

  In public middle- and low-rise apartments where elevators are not installed, the number of years has passed since the building was built, and residents are aging. For this reason, for the purpose of improving the living environment of residents, there is a demand for barrier-free housing and installation of elevators.

  As shown in FIGS. 10 and 11, which have been constructed so far, a typical low-rise apartment house 50 up to about 5 stories has a staircase 51 between two adjacent units as a basic structure. A stairway 52 is provided from the road level on the ground to each dwelling entrance 53 (FIG. 11). When installing an elevator in an apartment house with this kind of staircase 51, an elevator shaft is set up so as to be adjacent to the front of the staircase 51 of the existing residence 50, and the elevator is raised and lowered to the level (height) of each landing. A type with a mouth has been proposed. However, in this case, since several steps are left between the elevator door and each dwelling entrance, it is impossible to realize complete barrier-free. FIG. 11 is a plan view showing a floor plan example of the conventional apartment house 50 having the appearance shown in FIG.

  In consideration of this problem, the applicants have already jointly developed a technology that eliminates the steps from the elevator to the entrances of each dwelling unit and makes it completely barrier-free (see Patent Document 1). This technology removes the staircase from the staircase of the existing residence building and connects the elevator floor and the entrance floor of each dwelling unit to the same level between the elevator floors of multiple elevators installed in one building. By providing a communication floor that makes it possible to achieve barrier-free and elevator installation.

  By the way, in order to make barrier-free in each dwelling unit, water facilities such as bathrooms, toilets, toilets, etc. are the most important and equipment-intensive. As a technology related to this point, a technology has been proposed in which a watering facility is manufactured as an integral prefabricated unit structure and is constructed as an independent structure having a connecting portion outside an existing house (Patent Document 2). ).

  The cubic unit disclosed in Patent Document 2 is made of a factory-produced unit member having a substantially cylindrical shape, in which a bathroom, a toilet, and a toilet facility are efficiently arranged in a narrow space. In order to speed up and rationalize the construction of the water facilities in each dwelling unit, it is built sequentially along the side of the existing apartment house and connected to the existing building.

JP 2002-89056 A Japanese Patent Publication No. 7-96850

  In the technology described in Patent Document 1, as described above, the staircase used as an approach to each dwelling unit is removed, and an independent entrance floor, communication floor, between the elevator shaft and the existing dwelling building, Since an incidental structure such as an emergency staircase is installed, a large-scale extension work is required, and construction costs are also required. In addition, it may be necessary to move the residents temporarily during the period when the staircase is closed.

  On the other hand, the technology using the cubic unit described in Patent Document 2 has the first effect that rationalization of the plumbing equipment construction of the dwelling unit can be achieved, and incidentally, in the dwelling unit where the plumbing equipment is added, It is also possible to expect effects such as changing the conventional water space to a room for other purposes. However, the technique of Patent Document 2 does not mention any problems related to the barrier-free design and the elevator installation that realizes the purpose of the present invention. Further, in the cubic unit, since a plurality of water facilities are efficiently arranged on a small floor area, the layout is inevitably contradicted with the concept of barrier-free. Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, and can be constructed in a short period of time simultaneously with the extension of the water facilities and the installation of the elevator in consideration of barrier-free while the resident is resident. The purpose is to provide a barrier-free extension structure for existing apartment houses.

  In order to achieve the above-mentioned object, the present invention is formed in the vicinity of each outer wall surface of each adjacent dwelling unit with a staircase in an existing dwelling building, and a communication passage that can be communicated with an opening formed on the dwelling unit side is formed. An extension unit that integrates a skeleton and an infill in which desired equipment is installed in the skeleton is connected in accordance with the height of each dwelling unit of the existing dwelling unit, and is connected to the adjacent dwelling unit. Between the extension units, elevator doors and slabs forming a passage are provided, and the elevator provided in the extension unit can be accessed by the elevator using the elevator equipment.

  As a more specific configuration, close to the outer wall surface of each adjacent dwelling unit across the staircase of the existing dwelling, so that a communication passage that can be communicated with the opening formed on the dwelling unit side is formed, An extension unit that integrates a skeleton made of precast concrete and an infill equipped with a watering facility independently in the skeleton, and is laminated and connected in accordance with the height of each dwelling unit of the existing residence building, Between the extension units of the adjacent dwelling units, elevator slabs and floor slabs that form passages are erected, and it is possible to access the entrance provided in the extension unit by using the elevator equipment. Features.

  The extension unit is constructed so that precast concrete skeletons are stacked and connected, and the infill is formed in the skeleton, or is constructed with a cast-in-place concrete skeleton, and the infill is formed in the skeleton. Or a skeleton having a precast concrete plate attached to and supported by a steel structure constituting a predetermined frame shape is connected, and the infill is formed in the skeleton. preferable.

  In these cases, it is preferable that the extension unit has an internal space formed so as to oppose the open surfaces of the skeleton composed of a substantially identical floor and three outer walls.

  The infill includes a plurality of water facilities such as a toilet, a bathroom, a wash basin, and the like, and includes a water supply / drainage facility, and the water supply / drainage facility is provided independently under the floor between the skeleton and the existing It is preferable to connect to the water supply / drainage facility on the residential building side.

  It is preferable to form a blow-off portion between the floor slab and the handrail outer wall portion of the staircase of the existing residence building.

  The first floor entrance of the extension unit can be accessed by a slope provided along the outer periphery of the extension unit.

  It is preferable that an expansion joint is interposed between the extension passage unit and the building in the communication passage connecting the extension unit and the existing residence building.

  Moreover, since the staircase of the existing residence building is kept after the construction of the extension structure, the staircase can be used for access to the doorway (old entrance) of each dwelling unit.

  As described above, according to the present invention, since almost no construction is required for the existing residence building, it is possible to perform the extension construction while the residents live in the existing residence building, and the barrier-free structure. Because it is possible to build an extension structure with water facilities, it is possible to realize a completely barrier-free house together with the renovation of existing dwelling units. Access to each dwelling unit is equipped with an elevator facility in part of the extension structure. As a result, there are many effects that it becomes easier.

  Hereinafter, as the best mode for carrying out the barrier-free extension structure of an existing apartment house of the present invention, the following examples will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an external appearance in which an extension structure of the present invention is applied to an existing residential building 50 of the existing five-story apartment house shown in FIG. 10 as a conventional example. FIG. 1 shows a completed state in which the extension structure portion 10 of the present invention is constructed at the front position of the staircase 51 of the existing residence 50 shown in FIG. As shown in FIG. 2, a communication path 13 made of precast concrete is installed between the extension structure 10 and the existing dwelling unit 50 </ b> A between the opening 52 formed on the outer wall surface on the existing dwelling unit 50 </ b> A side. The existing dwelling unit 50A and the extension structure unit 10 can be moved back and forth.

The extension structure portion 10 of the present embodiment includes a skeleton 11 (FIG. 2) on the first floor that accesses the entrance 14 via the slope 1 constructed so as to go around the building, and a second floor that uses an elevator. The upper-floor partial skeleton 11 (FIG. 3) and a structure assembly including an infill 20 having an interior and facilities independently incorporated in each skeleton 11 (hereinafter, the extension structure portion 10 is configured). A structural assembly including a unit in which the skeleton 11 and the infill 20 are integrated is referred to as an extension unit 15). In the present embodiment, the basic structure of the skeleton 11 on the first floor and the second floor or more of the extension unit 15 is substantially the same except that the entrance position is different, and the floor slab and the three outer walls are formed integrally, respectively. Consists of a precast concrete slab molded product having an open surface and a substantially box shape. A known precast concrete plate connection structure such as a coupler joint is used for stacking the extension unit 15 on the upper floor and connecting the open surface of the skeleton 11. Further, in order to achieve water tightness, a waterproof sealing work (not shown) is performed between the extension units 15 to construct a durable structural assembly. The extension unit 15 on each floor has a communication opening 12 with the existing residential building 50 side, and has the same size as the existing side skeleton 11A installed on the existing side and the front side installed on the front side of the extension structure unit 10. An extension unit 15 is constructed which is composed of a skeleton 11B, and is integrated by connecting the existing side skeleton 11A and the open side of the front side skeleton 11B to each other and connecting them by a known joint member. In this embodiment, for example, the floor areas of the skeletons 11A and 11B are set to about 2.25 m × 3.3 m, respectively, and an extension unit 15 connecting the skeletons 11A and 11B can increase the floor area by about 15 m ^2. Realize.

  In the above description, the extension unit is an example of a standardized precast concrete product produced in advance in the factory, but the extension structure portion has a simple planar shape as in Example 3 to be described later. In addition, it is possible to construct an extension unit with cast-in-place concrete in locations where it is difficult to enter heavy machinery for stacking precast concrete products. In addition, it goes without saying that a composite structure in which a frame structure is erected with a steel structure and the surface is closed with an ALC panel or the like can be used as an alternative construction method.

  In general, the first-floor entrance 53 (FIG. 11) of the existing residence 50 is usually located at a height of about 1 m above the ground, and is provided at a place where several stairs 52 are raised. In this embodiment, as shown in FIG. 4, the foundation frame concrete 4 is placed integrally with the predetermined foundation structure 3 to adjust the level, and the extension structure portion 10 is constructed thereon.

  In the present invention, the infill 20 of the extension unit 15 is provided with water facilities such as a bathroom 21, a toilet 22, and a wash basin 23 that are considered barrier-free on the premise of the use of elderly people. These facilities consist of semi-finished unit products built into skeletons 11A and 11B at the prefab factory. In the present embodiment, the existing side skeleton 11A provided with the entrance is provided with a rising rod 24 having a slope around the entrance, a lower foot shelf 25, a floor 26, and a toilet 22, while hot water supply and drainage are provided on the front side skeleton 11B portion. A unit bath (bathroom 21) to which piping is connected and a wash basin 23 are installed. The hot water supply and water supply / drainage pipes of each water supply facility are integrated and led to the existing residential building side through a communication passage, and are connected to the water supply facilities in the existing dwelling unit. In addition, for drainage equipment piping, a pipe shaft that penetrates the extension unit in the vertical direction is provided, a dredging drainage pipe is provided in the pipe shaft, and inside the water collecting pit provided in the foundation of the extension structure through this dredging drainage pipe It is also preferable to drain and collect water.

  In addition, the windows, passages, entrances, etc. provided at predetermined locations on the outer wall version of the skeleton of the extension unit 15 are carried in the field with sashes and doors of specifications adapted to the respective opening dimensions. . Furthermore, the floor 27 (see FIG. 5) is a double-structure free access floor in which a space is provided between the skeleton 11 and the infill 20, and the water supply / drainage pipes, electrical wirings, communication lines (see FIG. (Not shown) under the floor, and after the extension unit 15 is installed, each pipe, wiring, etc. is drawn out to the existing dwelling unit 50A side through the communication passage, and the existing water supply / drainage facility, electrical wiring, communication line (not shown) Connection).

  FIG. 2 is a plan view illustrating a plan plan example of two adjacent dwelling units where the extension structure 10 on the first floor is added. As shown in the figure, the first floor can be accessed directly by a wheelchair using a sloping slope provided along the outside of the extension structure 10.

  At this time, the extension part of the adjacent dwelling units is about 3.5 m away, and the space on the first floor part of the dirt floor 6 is a first floor elevator hall and an access passage to the staircase of the existing residence 50 As a common floor used for bicycle storage, etc., it is finished with durable floor materials.

  FIG. 3 is a plan view showing a plan plan example showing the extension structure portion 10 on the second floor or higher. In the extension unit 15 above the second floor, as will be described later with reference to FIG. 5, a slab 16 corresponding to a corresponding common floor also serving as an elevator hall is adjacent to the top of the skeleton wall via a support protrusion 17. The extension unit 15 on the upper floor is stacked on the slab 16 and integrated with a connecting portion (not shown), and the extension structure portion 10 on each floor is sequentially constructed. An elevator opening 18 in which the elevator is installed in the future is formed at a predetermined position of each slab 16.

  In this embodiment, the residents on the second floor and above use the elevators to go up to the respective floors, and use the entrances 14 facing the adjacent dwelling units through the common floor 19 that also serves as an elevator hall. Yes. In this embodiment, the periphery of the elevator equipment unit 31 installed in the elevator opening 18 penetrating each slab from the second floor to the fifth floor also serves as an outside opening / closing door 32 for getting on and off the elevator and a light on the outer wall surface side. It is covered with a partition panel 33 made of tempered glass and a partition plate 34 made of precast concrete on the passage side.

  Further, as shown in FIG. 3, a blowout portion 35 having a predetermined plane area is formed between the common residence floor and the handrail outer wall portion of the staircase 51 of the existing residence 50 as shown in FIG. 3. It is also possible to lay a floor material 36 having air permeability such as expanded metal in a part of the blow-off portion, and to secure a portion where the outdoor unit 37 of the air conditioner of each dwelling unit can be installed.

  As shown in FIG. 3, the floor plan example of the extension structure part 10 of each dwelling unit above the second floor is different from the case of the extension structure part 10 on the first floor. The bathroom and bathroom are also functionally arranged in consideration of barrier-free.

  Next, the construction procedure of the extension unit 15 will be described with reference to FIGS. As shown in FIG. 4, the base portion of the extension structure portion 10 is constructed on the site in front of the building that is separated from the staircase of the existing residence building 50 by a passage. In this embodiment, a predetermined number of pile foundations 2 that are supported on the same supporting ground as the existing residence building 50 are provided as the foundation structure of the foundation portion, and the planar shape of the extension unit 15 is supported so as to connect the pile heads. A fabric foundation 3 and a foundation frame concrete 4 for level adjustment of an extension unit (not shown) are integrally placed. As described above, by laying the foundation frame concrete 4, the floor height of the first floor of the existing residence building 50 and the floor height of the first floor portion of the extension unit 15 are made to coincide with each other. Barrier-free in movement between the two. Since the earth floor 6 on the first floor is used for access to the elevator door and the staircase 51 of the existing residence 50, a concrete slab is placed in the subsequent process, and a concrete decorative plate or floor tile is used. It is preferable to construct.

  Thereafter, as shown in FIG. 5, the extension unit 15 (existing side, front side) is suspended and connected to the existing dwelling unit 50 </ b> A via the communication port (not shown), and the extension unit 15 on the lower floor is connected. Bonding between the two. Thereafter, the support protrusion 17 of the floor slab 16 for the common floor 19 is installed and fixed between the extension units 15 to complete the extension structure 10 for each floor. At this time, an expansion joint (not shown) is provided on one building side of the communication passage 13 between the extension structure 10 of each dwelling unit and the existing dwelling building 50 side, and the amount of displacement of the building that occurs during an earthquake or the like It is preferable to absorb the difference. In this embodiment, after completing the extension structure 10 for the same five floors as the existing residence building 50, the elevator shaft penetrating in the vertical direction at the common floor 19 position has a height equivalent to the fifth floor (not shown). An elevator equipment unit 31 in which equipment such as a frame steel frame, a lifting mechanism, a cage, and a drive control unit is incorporated is built from a roof opening (not shown). Thereafter, an upper roof 40 as shown in FIG. 1 is installed to close the rooftop opening. At the same time, by attaching the outer opening / closing door 32 and the side partition plate 34 so as to surround the elevator shaft on each floor, the elevator equipment can be completed at an early stage.

  6 and 7 are plan views showing an embodiment in which a common floor is arranged at a boundary wall position of an adjacent existing dwelling unit in order to construct an extension structure portion in a compact manner. The advantage of the second embodiment is that the cost can be reduced without changing the floor area of the extension structure 10 of each dwelling unit by minimizing the area of the common floor.

  FIG. 6 is a plan view showing a plan plan example of two adjacent dwelling units where the extension structure 10 on the first floor is added. In this embodiment, as shown in the figure, the extension structure portion 10 is provided with the boundary wall 55 of the adjacent dwelling unit symmetrically, and the adjacent extension structure portion 10 is constructed by a distance that allows the elevator shaft to be installed. Has been. In particular, on the first floor, the extension structure portion 10 is the occupied portion 29 of each extension structure portion 10 on the back side of the elevator shaft (existing residential building side). In this embodiment, it can be used in a laundry room or the like in the back of the washroom. As in the first embodiment, the entrance 14 on the first floor can be used in a wheelchair using the slope 1 having a gentle slope provided along the outside of the extension structure 10. Each extension unit 15 is arranged so that the skeletons 11A and 11B connected in pairs are arranged side by side in the existing residence building 50, so that the site area of the extension portion can be suppressed, and the interval between the residence buildings There is an advantage that it is easy to apply even in a narrow case. At this time, the staircase 51 (the staircase 52) of the existing residence 50 is left and used as an up and down staircase to the entrance of each dwelling unit that also serves as an emergency staircase.

  FIG. 7 is a plan view showing a plan plan example showing the extension structure portion 10 on the second floor or higher. In the extension unit 15 above the second floor, the slab 16 constituting the common floor 19 serving as the elevator hall and the front entrance floor is installed between the extension units 15 adjacent to each other in the same manner as in the first embodiment. The extension units 15 on each floor are stacked. As is apparent from FIGS. 6 and 7, the elevator installation of the present embodiment has an elevator door (open / close door 32) on the front side of the building on the first floor, and the common floor side of the building is on the floor above the second floor. The elevator of the type which has a raising / lowering opening in the both sides | surfaces which become the (opening-closing door 32) is employ | adopted. Also in the present embodiment, a blow-off portion 35 having a predetermined flat area is formed between the existing residence building 50 and the common floor 19. A floor material 36 having air permeability such as expanded metal can be laid in a part of the blow-off portion, and an outdoor unit 37 of an air conditioner of each dwelling unit can be installed.

  FIG. 8 and FIG. 9 are plan views showing an embodiment provided with only an elevator facility as a function of the extension structure portion. The advantage of the third embodiment is that only an elevator facility is provided as an access means, and the current function of each dwelling unit is used as it is by minimizing the area of the common floor, thereby realizing an inexpensive extension plan. There is in point that can.

  FIG. 8 is a plan view showing a plan plan example of two adjacent dwelling units where the extension structure 10 on the first floor is added. In this embodiment, as shown in the figure, the extension structure 10 includes a space in which an elevator shaft can be installed between adjacent dwelling units, an elevator elevator 32 having two elevators on both sides, and an existing residence building 50. The flat layout ensures access to the elevating stairs (flow line indicated by the white arrow) to the doorway of each dwelling unit through the stairs room 51 (step 52). In this embodiment, the elevator equipment unit 31 provided with open / close doors on both side surfaces similar to that in the second embodiment is also employed, and the elevator user is provided independently at each dwelling unit on the stop floor. You can get on and off from the designated entrance / exit 32 leading to the passage 13 and the alcove 42 as a dedicated approach to the entrance.

  In the present embodiment, a trunk room 41 for first-floor dwelling units is secured on the side of the first floor extension structure 10 facing the elevator shaft. The plane portion of the trunk room 41 corresponds to an alcove 42 as an approach from the dedicated elevator elevator 32 to the entrance of each dwelling unit on the upper floor. Also in the present embodiment, a blow-off portion 35 having a predetermined flat area is formed between the existing residence building 50 and the elevator shaft. An outdoor unit (not shown) of an air conditioner of each dwelling unit or the like can be installed on a part of the entrance side floor 43 between the atrium 35 and the entrance 14 of each dwelling unit.

  The entrance 14 on the first floor can be used in a wheelchair using the slope 1 having a gentle slope provided along the outside of the extension structure 10 as in the first and second embodiments. In addition, each extension unit 15 can also suppress the site area of the extension part on the front of the building by arranging the skeletons 11A and 11B connected in a pair so as to be lined up side by side in the existing residence building 50.

  FIG. 9 is a plan view showing a plan plan example showing the extension structure portion 10 on the second floor or higher. In the extension unit 15 above the second floor, the slab 16 constituting the passage 13, the alcove 42 and the entrance side floor 43 as an approach to the elevator hall and the entrance 14 of each dwelling unit is installed between the elevator shaft and the extension unit 15. Has been.

The perspective view which showed the external appearance which applied the extension structure of this invention with respect to the existing residence building. The top view which showed the floor plan example of the extension structure part shown in FIG. 1, and the 1st floor part by the side of the existing dwelling unit. The top view which showed the floor plan example of the 2nd floor or more of the same building as FIG. The schematic perspective view which showed the construction example of the foundation part and foundation frame part of an extension structure part. State explanatory drawing which showed the construction state which has suspended the extension unit in the 3rd floor part. The top view which showed the floor plan example of the extension structure part by Example 2, and the 1st floor part by the side of the existing dwelling unit. The top view which showed the floor plan of the 2nd floor or more of the same building as FIG. The top view which showed the example of a floor plan of the extension structure part by Example 3, and the 1st floor part by the side of the existing dwelling unit. The top view which showed the example of a floor plan of the 2nd floor or more of the same building as FIG. The perspective view which showed an example of the external appearance of the conventional apartment house type staircase type. The top view which showed the example of a floor plan of the adjacent dwelling unit which pinched | interposed the staircase of the apartment house shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Extension structure part 11, 1A, 11B Skeleton 13 Connecting passage 15 Extension unit 16 Slab 20 Infill 31 Elevator equipment unit

Claims (11)

  A skeleton in which an opening formed on the side of the dwelling unit is formed close to the outer wall surface of each adjacent unit across the staircase of the existing residence building, and a communication passage capable of coming and going is formed, and desired equipment in the skeleton An extension unit that is integrated with the infill installed in the building is connected to the floor height of each dwelling unit of the existing residence building, and is connected between the extension units of the adjacent dwelling units. A barrier-free extension structure of an existing apartment house, characterized in that a slab that forms a passage is provided and the entrance provided in the extension unit can be accessed by raising and lowering using the elevator equipment.   A skeleton made of precast concrete, close to the outer wall surface of each adjacent dwelling unit across the staircase of the existing dwelling, so that an opening formed on the dwelling unit side and a communication passage that can come and go are formed, An extension unit integrated with an infill equipped with watering equipment independently in the skeleton is stacked and connected to match the height of each dwelling unit of the existing residence building, and the extension unit of the adjacent dwelling unit In the middle of the existing apartment house, the elevator slab and the floor slab that forms the passage are installed, and the elevator provided in the extension unit can be accessed by the elevator. Barrier-free extension structure.   3. The barrier-free building of the existing apartment building according to claim 1, wherein the extension unit is constructed so that precast concrete skeletons are stacked and connected, and the infill is formed in the skeletons. 4. Extension structure.   3. The barrier-free building for an existing apartment building according to claim 1, wherein the extension unit is constructed of a cast-in-place concrete skeleton, and the infill is formed in the skeleton. 4. Extension structure.   The extension unit is constructed such that a skeleton having a precast concrete plate attached and supported is connected to a steel structure forming a predetermined frame shape, and the infill is formed in the skeleton. Or the barrier-free extension structure of the existing apartment house of Claim 2.   6. The extension unit according to any one of claims 3 to 5, wherein an internal space is formed so as to oppose an open surface of a skeleton composed of a substantially identical floor and three outer walls. Barrier-free extension structure of the existing apartment house described in the section.   The infill is provided with a plurality of water supply facilities and water supply / drainage facilities therein, and the water supply / drainage facilities are provided independently under the floor between the skeleton and connected to the water supply / drainage facilities on the existing residence building side. The barrier-free extension structure of the existing apartment house according to claim 1 or 2, wherein the structure is a barrier-free extension structure.   The barrier-free extension structure of the existing apartment house according to claim 1, wherein a blow-off portion is formed between the floor slab and a handrail outer wall portion of the staircase of the existing residence building. .   The barrier-free extension of an existing apartment building according to claim 1 or 2, wherein the first floor entrance of the extension unit is accessed by a slope provided along the outer periphery of the extension unit. Construction.   3. The existing apartment house according to claim 1, wherein an expansion joint is interposed between the communication passage connecting the extension unit and the existing residence building with the building. 4. Barrier-free extension structure.   The staircase of the existing residence building is kept even after the extension structure is constructed, and the staircase is used for access to a doorway (old entrance) of each dwelling unit. Barrier-free extension structure of the existing apartment house described in 2.

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