JPS61109845A - Knock-down type moving building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] "Industrial Application Field" The present invention relates to a block-buildable knock-down mobile building.

"Conventional technology" As a block-build architectural structure, patent application Shoj'ko/37
There is an invention disclosed in Patent Application No. 67 and Japanese Patent Application No. 3-114!3'l/4. This first conventional example has a rigid soybean cube block structure that constitutes a living space with an opening on the side. and,
Consisting of a part of the floor cover, the joint type corner column has a flange on the inside where the bolt holes that are the joint end faces of the blocks are aligned, and a flange on the lower end that extends horizontally to the outside of the block. It has an integral installation seat, its upper part is fastened to the end face of the joint beam, and its upper end has an integrated flange on the end face that is flush with the upper surface of the joint beam and is aligned with the flange at the lower end, The joint beams are fastened vertically along the structure on the left and right sides of the opening, and the joint beams are fastened close to the back of the flanges of the joint surfaces of the joint-type corner columns on the left and right sides of the opening, and the joint beams are fastened horizontally across the beams. Bolt holes are drilled opposite to the joint gutter part, and the valley gutter is installed along the joint beam via the outer frame on the upper end flange of the joint type corner column and the joint beam, and the edge of the valley gutter is It is covered by the edge of the roof surface material, and a valley gutter cover is removably provided at the joint of the opposing valley gutter, and a part of the floor cover has a large gap between the outer peripheral frames of the opposing floor. It is a block-build architectural structure in which the openings have a joint structure in which the openings of the blocks are butt-matched and connected with bolts and nuts. Blocks are portable and can be used to construct one-story buildings of various sizes and sizes.The second conventional example is a rigid soybean cube block structure that constitutes a living space with openings on the sides. The end face of the opening consists of a joint-type corner column, a joint beam, a joint valley gutter, and a part of the floor cover.The joint-type corner columns are placed on both sides of the opening, and the joint-type corner columns are placed in the middle. In the block, joint type corner pillars and end corner pillars are placed in the four corners, and in the end block, the positions of these four corners are the same,
The joint type corner column and the lower end of the corner column have an integral flange for drilling a bolt hole, and the upper end of the corner column is horizontally placed above the top surface of the roof through the joint valley gutter and the outer peripheral frame of the roof. A joint support fitting having a bolt hole is provided, and a flange having a bolt hole is integrally provided at the upper end of the corner column on the same horizontal plane as the top surface of the joint support fitting, thereby forming a corner column flange above an end block that constitutes a downstairs. and joint support brackets and joint support brackets at the four corners of the intermediate block, and the flange under the corner column of the end block that is to form a floor. It is a block-build architectural structure in which the upper and lower blocks are connected by their respective bolt holes, with flanges at their lower ends abutting each other.Each block is individually portable, and together, each block can be used to It made it possible to construct buildings.

``Problems to be Solved by the Invention'' In the conventional example described above, blocks are disassembled and stored when not in use, but blocks cannot be disassembled to reduce their volume, so the storage space is large. A large space is required, the amount of capital such as land required for storage is large, and loading machinery of considerable capacity is required, which increases transportation costs. Therefore, although it is excellent in that an office, dormitory, etc. can be set up at a desired location extremely quickly, there is a need for a device that is not portable and has a small storage space when not in use.

It is an object of the present invention to eliminate the drawbacks of the above-mentioned conventional examples, and to provide a knock-down mobile building that can be used in block-built architectural structures, has the possibility of reducing storage space, and is flexible in portability. It is something to do.

[Structure of the invention]

"Means for Solving the Problems" The present invention provides a floor that is rectangular in plan view and has L-shaped pillar mounting seats upright on the corners of which a corner pillar can abut, and a floor that is mounted on the pillar mounting seats of the floor. A corner column that is removably inserted and has an L-shaped cross section and has a panel mounting flange in the right angle direction on the inside that constitutes the hollow part, and a support column that fits into the upper part of the corner column and can be attached to and removed from the corner column. A roof with rain gutters on the upper surface of the outer periphery, a middle column that is removable at both ends and has a wall panel mounting flange on the inside, and a hollow between the columns from the outside to install the roof, floor, and columns. It is a knock-down type mobile building consisting of a removable panel attached to a flange. Then, the necessary intermediate columns are fixed across the space between the floor and the roof, the panels are erected between the columns from the outside, and the panels are fastened to the mounting flanges of the floor, roof, and columns. The decomposition is in the reverse order.

"Embodiments" Examples of the present invention will be described below with reference to the drawings. Figures 1 to 4 show the assembled state, where Figure 1 is a front view, Figure 1 is a side view, Figure 3 is a plan view, and Figure 4 is a floor plan. As shown in the figure, in the assembled state, it is a single wooden cubic block, and these blocks are made up of units as shown in Figures 5 to 1. o/ is the floor, yu is the roof,
3 is a corner pillar, da is a window panel, 3 is a door panel, 6 is an equipment panel, ri is a blind panel, and j is an intermediate pillar. They form a unit that is decomposed and usually not decomposed further.

Figure 73 is a plan view showing the connection between the floor l and the corner pillar 3,
Figure D is a front view of Figure 1J.0 As shown in the cross section in Figure 73, the girder made of channel steel with a lip on only one side and the end frame member are square with their grooves facing outward. Column mounting seats l are arranged and welded at their four corners to seat plate 13 and seat plate /3.
Connect by welding through II, and connect joist 1 to wife and child between girder l1.
3 are connected in parallel. The pillar mounting seat /9 of the seat plate 13 has thick corners (a chamfered L-shaped plate is installed upright on the seat board 13, and the right angle part of the pillar mounting seat /4' is connected to the girder /l and the gable side frame. It is welded to member l.A floorboard 16 is fixed in contact with the inner green and joists 13 on the upper surface of girder l and girder frame member l. , 2 are provided with hooks 10 so that the entire block can be lifted up.

The corner column 3 is made by welding an inner column member and an outer column member/l into one body, and has a hollow angle shape. The column inner member 7 and the outer member 7 extend outward from the hollow portion to form a panel mounting flange tq. A packing 〇 is held at the part where the end of the outside member It is fixed to the bent mounting flange/de (Fig. tS, Fig. 1).
? figure). The outer member /1 has a portion facing the outer side and a lower end of a portion of the inner and outer members A on both sides thereof is the seat plate 13.
The remaining part of the member in the inner and outer direction of the outer member and the lower end of the column inner member are located at a position slightly higher than the floor plate /6.

Recessed seat 2/ provided on the member facing the outside side of the outer member/l
A reinforcing material 9 that abuts the column mounting seat/4t is welded to the back and inside of the corner of the column. It is assembled by inserting the bolt 2- into the nut 2J fixed to the floor column mounting seat/l by inserting the bolt hole in the material.

Figure 76 is an enlarged sectional view taken along line A-A in Figure 3, and Figure 17 is an enlarged cross-sectional view of Figure 3.
Figure B-]3 is an enlarged enlarged view, Figure 7g is an enlarged plan view of the corner of the roof, and Figure 79 is an enlarged sectional view taken along line a-C in Figure 7.

As shown in Figure 11, the roof frame on the girder side is made of a type 2 steel section ulIA with a lip, and a lip groove f1424' that is in contact with and welded to the web of this material 4ZA and the outer flange.
It consists of B. As shown in the first diagram, the roof frame on the gable side! A Z-shaped steel section with a lip 2'A and a steel member 23B with a lip-shaped cross section are welded together, and the roof frame 2'l,
2! are arranged in a square shape, and the corners are roof frames 2'l, 2! R is butted and welded together as a joint shape, and the lip channel steel is a component of the roof frame 21I! llB and the roof frame 3 are connected by welding to the L-shaped cross-section support pillar rollers that abut the inner side of the corner formed by the end of the lip-shaped cross-section steel material -25B.

At the corner of the roof, an L-shaped member 3OA is welded to the roof frame 2'L, the web of the roof and the rain gutter body, and an anglerfish 3Q is installed to guide rainwater, but the roof frame is made of steel 211B.

Ko! A partition material 3θb that partitions the B end prevents rainwater from entering the roof frame 2 and into the roof. The end of the gutter core comes to the edge of the anglerfish 30.

The richness is the roof frame ≠, ko! It is a rain gutter made of lip channel steel fixed on the top, and is not continuous but separated at the corners of the roof frame 2 and 3. Roof material 2g is fixed to the upper lip of the roof frame 2 and 5, and on the inside of the roof frame 2 and 5, there is an L-shaped ceiling edge 29 with a cross-sectional lip. In the direction of the wife and child, the ceiling plate J- is fixed to the roof frame 2 by interposing ceiling plate supporting members J/ each having an L-shaped cross section.

As shown in FIG. 1.9, a column upper part numbering member 3J with a lip and having an L-shaped cross section is fixed inside the upper part of the corner column 3. A gap is provided between the column upper numbering member J3 and the column inner side member 17, into which the roof support column 26 is inserted, and the roof is suspended so that the roof support column 26 is inserted into this gap. From the opening 31I of the inner column member 17, insert the bolt 3 through the bolt hole of the supporting column 6! The roof and the corner pillar 3 can be fixed by screwing into a nut 36 fixed to the pillar upper mounting member 33.

The intermediate column t is made by welding a flange member 3g to a hat channel steel 37. A mounting plate 39 is fixed to the intermediate column t at the lower part inside the web of the intermediate column g, and projects downward from the intermediate column g. A packing lIo is held within the lip of the hat channel steel of the intermediate column g.

As shown in Figure 10, the lower end of the intermediate column g is fixed by inserting it through the bolt hole of the mounting plate 39 and screwing it into the blind nut 2 fixed to the floor frame, as shown in Figure ai. As shown, the upper end of the intermediate column T is inserted into the bolt hole of the mounting flange at the lower end of the roof frame 2 and 3, and the blind nut 3 fixed in the web of the intermediate column S is screwed in and pulled outward. It's a collection.

Window panel t, sin panel 5, equipment panel 6, and blind panel 7 are made of modules with the same height and width, and their outer frames have the same configuration, so window panel V is representative. I'll do it.

Figure 2-2 is a horizontal cross-sectional view of the window panel, and Figure 1-23 is a longitudinal cross-sectional view of the window panel in the interior and exterior directions. Assemble the formwork da5, upper frame lI6, and lower frame gua of the same square vibe into a square, formwork lIr
The outer circumferential material +y with a U-shaped cross section is fixed to the outer circumferential side of the panel frame and covers and holds the indoor decorative panel dub and external wall material S/ fixed inside and outside the panel frame.

A blind nut octopus for attaching panels to the intermediate column g and the cocoon column 3 is fixed to the vertically central portion of the indoor side of the formwork aS. On the outside side of the upper frame 4ch, there is a blind nut S3 for attaching the panel to the roof frame Kohiro or KoS.
is fixed. A packing 50 that can come into contact with the roof frame is fixed to the upper surface of the upper frame 4cb. Z-shaped steel mounting flange on lower frame ψ7! With the flange facing vertically, the web is brought close to the lower frame 4'7, and the upper flange is fixed to the lower frame 4'7 with a decorative plate ≠9 interposed therebetween by screw members (not shown).

A gnat is a lintel, and 56 is a window sill! 7 is lintel jj, window sill j
6 is a window mounting formwork with fixed ends, and a lintel.
The ends of the window sill S6 are extended to both sides and fixed to the formwork pt. This lintel! ! , the window mounting formwork constitutes the sash mounting frame 3g, and the sash frame! is fitted from the outside and fixed to the sash mounting frame sg. A sliding shoji 61 is fitted into the sash frame (Fig. 7,
(See Figure g). Satsushi frame 5? There is a gutter 62 on the outside of the upper frame.
are in contact with each other, and 3 pieces of exterior wall material are covered with the gutter on the inside.
The edging material 6J, which has a U-shaped cross section, is fixed along the edge of the sash frame 59 through the sealing material 6 to form the exterior wall material! It is fitted into the edge of l.

A decorative picture frame 63 is fixed to the inner side surface of the sash attachment frame Sg via a decorative plate '19, and the frame 65) is also fixed to the sash frame jde.

5 Components related to such windows include the door 66 (Figure 1, Figure 1) in the sin panel j, and the equipment panel 6 (
In FIG. 1O), for example, a folding desk, a ventilation fan, etc. are provided on the indoor side, while the blind panel 7 (FIG. 1/) is not provided with anything.

For installation such as panel mounting, please assemble after the floor/roof, corner pillar 3, and middle pillar g are assembled.
This is done. The first figure is the panel between the corner pillar 3 and the middle pillar 3.
, the symbol /θ is used to represent the blind panel 7, etc.), and the panel 10 is installed from the outside of the block so that the lower end of the mounting flange j4' is outside the girder l/ in FIG. 23.
Fold it inward and erect it in the kendon style and place it on the girder and/or the gable side frame member l. When the panel IO is stood vertically, the upper part of the panel IO will hit the end of the mounting flange part AI at the lower end of the roof frame Koda or Koj, and the packing IO will be the roof frame λ of the roof.
Press against 5 or 5. At the same time, the gaskets so and go held by the corner column J1 and intermediate column g come into contact with the inner vertical corners of the panel 10. Then, insert the bolt hole of the mounting flange 6g at the lower end of the roof frame, 2g or -j, screw the bolt 6d into the blind nut j3, and attach the mounting flange! A blind nut that is inserted through the bolt hole of the holder and fixed to the girder/l or the end frame member/l! - Screw in and tighten. Next, the bolts 70 and 72 are inserted through the bolt holes of the mounting flange/de of the corner pillar 3 and the mounting flange 3g of the intermediate pillar and screwed into the blind nuts s2 fixed to the panel IO, respectively. .

By fixing the panel 10, even if the panel 10 is warped, it is corrected. When assembling one panel IQ between the intermediate pillars g and g, it is assembled in the same manner as when the panel 10 is assembled between the corner pillar J and the intermediate pillar 3 as described above.

The individual configurations and partial assemblies have been described above, but the overall assembly order is to erect the corner pillar 3 on the floor, lower the roof λ onto the corner pillar J using a loading machine such as a crane, and fix it on the intermediate pillar. t is fixed across the floor/roof space, and panels IO are erected and fixed between the corner pillar 3 and the intermediate pillar 3 and between the intermediate pillars t and g, respectively, and the finished product is completed. Such a completed block is designated by code 7.
3 to 26 are examples in which a plurality of blocks 3 are arranged in a single layer. In the Koda diagram, the block is 73-/,
73-2.7.7-. 7 sanshin are used, and the finger-hand sides are joined, and the finger-hand side is the middle pillar g.

Since no panel IO is installed, it is a one-floor structure.

Figure 23 shows blocks '13-/, 7.1-1, 7.7-
J.

The rear 3-da is used as the finger hand, and the wife and child are the joint surfaces, and the interior can be placed without installing the intermediate pillar G1 panel IO, and the wife and child side is partitioned and a door panel 5 is attached to create two rooms that can be accessed. It is also possible to do this.

In Figure 7, the wife and child of blocks 73-/ and 7.7-2 are used as joint surfaces, and the joint surfaces are the intermediate pillars 3, and the panel io may be omitted, or a sin panel j may be provided as a partition.

As described above, the block of the present invention can have a floor plan with one wide and narrow floor or with appropriate partitions.

One block 73 is disassembled in exactly the reverse order from when it was assembled. When disassembled, the floors/roofs can be largely overlapped, and each panel IO can be mixed and stacked. Furthermore, since all panels are made from the same module, even if panels IO are mixed and stacked, there are only a few different sizes, so in one block, the floor/top and the roof are stacked as shown in Figure 33. . At that time, the corner pillar 3 is placed in the space created by the support pillar 16.
The middle pillar g1 panel lθ etc. can all be stored. When stored, the area is equivalent to the floor space of seven blocks 3, and other stored blocks are sequentially stacked on top of the stored blocks to form one assembled block 7J.
The height is much lower than that of Therefore, several block blocks 3
Since each of the constituent units can be stored in one block 73 with a large floor area, the space required is extremely small compared to the storage of unit blocks in conventional block construction. The corner pillar 3 is L-shaped and becomes smaller when combined, and the middle pillar j
can be bundled to make them smaller.

FIG. 33 is a side view of the girder. When storing the above-mentioned block constituent units, first, the floor 1 is placed on the ground. Each unit can be stored from any direction, and stacked from the left side of Fig. 33 with the middle pillar g facing the wife and child.Since the corner pillar J is L-shaped, it is stored with a rectangular cross section when combined, and the blind panels 7 are stacked. , then stack the window panels,
The equipment panel 6 is stacked on the door panel 3, and the intermediate column g is stacked on the right side in the same manner as the intermediate column g stacked on the left end, and the remaining corner column J is placed on the rightmost side. Once stacked in this way, each panel and pillar is tied to the floor by covering it with a suitable sheet and using the hook 10 on the floor to hang a rope over the sheet. Finally, when the roof is placed on the floor L, the support pillars 26 come into contact with the upper surface of each corner of the floor. The length of the supporting pillar λ6 is the length of the floor l and the ceiling J of the roof when each panel and pillar are stored.
There is a slight distance between the J and J blocks, so that the lighting fixtures attached to the ceiling do not need to be removed each time the blocks are disassembled.

Next, we will discuss the structure of the joints when the blocks 3 are combined to form a wide and narrow one-story building. FIG. 27 is an enlarged view of section D in FIGS.

The blocks 73 are placed so that the end faces of the seat plate 13 are in contact with each other. When the seat plates/3 come into contact with each other, there is a gap between the floor girders//or gable side frame members/co as shown in the vertical cross-sectional view perpendicular to the joint surfaces of the blocks in Figure 1g. Then, a joint airtight material 71I is inserted between the corner pillars 3 to maintain airtightness between the upper and lower corners of the corner pillars 3. Therefore, the joint surface is the joint airtight material 7
1I and packing 20 to block air from outside. In a case like the part E in Figure 25,
Only ○ is sufficient, and joint airtight material 7≠ is not necessary. Corner pillar J, J flange/9. Insert a joint 5 that spans the entire length of the corner pillar 3 with a U-shaped cross section between 1 and 1, insert the bolt hole in the flange 1, and screw the bolt 76 into the nut 7 that is welded to the joint. This is hereby concluded. A floor plate 16 is installed between the girder 1 and the girder side frame members 74.
A surface material ffJ is fixed onto the lower plate g/ that is fitted between the ends, and a floor joint material 13 having a flange shape at the end of the surface material KA is fitted.

At the top of block 7J, as shown in the near diagram, if the seat plate/J edge touches at the bottom, the roof frame will be thick or 2! The bottom flange surfaces of the two are in contact with each other.

Then, the bolt holes in the mounting flange 6g of the flange are inserted and fastened with through bolts and nuts g. 9/
is the roof frame 2 that covers the joint surface from the bottom ≠ or yu! 30 is a side view of FIG. 27, and FIG. 31 is a plan view of FIG. 30. block? A valley gutter will be created between 3 and 7.3. Therefore, a rectangular container-shaped valley gutter cover 79 that is long in the longitudinal direction of the joint surface is attached to the lips of the opposing flanges of the rain gutter Koku, Koku'' through a sealing material g/ so as to cover the gap between the rain gutter λ and λ. Cover it from above.

Number two! In the case of section E in the figure, the connections are made in four directions with the center of section G as the point of symmetry as shown in the near diagram. In order to stack blocks 73 over two stories, the rain gutter should be connected as shown in Figure 3. An intermediate support gg is fixed to the bottom of 27. Support g
tt is provided so that each block 73 is in one common place.

At the corner of the roof λ, there is no gutter core above the roof frame CoL and Yu3, and there is an intermediate support gg on the roof frame Coda and Utah webs in this area, as shown in Figures 29 and 30. An endothelial holder S9 of the same height is fixed.

A bolt hole is provided in the upper part of the inner skin holder &9 at the same position on the same projected plane as the bolt hole provided in the seat plate 13, and a nut hole 5 is welded to the lower part of the bolt hole.

When the blocks 73 are stacked vertically and matched, the seat plate/J of the block J on the upper floor is the inner skin holder 19 of the block on the lower floor.
A seat plate, which is fixed to the lower surface of a girder l/ (not shown) of the block 3 on the upper floor, abuts on the intermediate support gg. Then, insert a bolt (not shown) through the bolt hole ga of the seat plate 13 on the upper floor and tighten it to the nut t of the inner skin holder of the block 3 on the lower floor.
Screw into s and fasten top and bottom. Also on the upper floor, two or more blocks 3 can be arranged on a plane and laid out in the same way as on the lower floor.

Stair support fittings g6 are provided on each girder l/ of the block 73, and a staircase can be provided (the stairs are not shown).

〔Effect of the invention〕

The present invention has the following features: (1) Since the floor, pillars, roof, and panels are each bolted together, they can be assembled and disassembled freely.

(g) When disassembled, it can be transported to the building by truck/vehicle, and the transportation cost is extremely low compared to conventional examples that cannot be disassembled. (3) Each unit can be stored stacked on top of each other for about 7 blocks, so the storage space is small. (i) The panel is modular and the necessary functions can be installed in any position.

(j) Since mounting flanges are provided on the inside of each column, when joining two blocks, if the mounting flanges are connected with a joint, the combined columns will be seven columns,
Any building assembled without distinction, such as continuous buildings or single track, is considered to be a building. (6) Corner columns are also symmetrical with respect to the bisector line that passes through the corner of the block, so it is possible to join the gable side, making it possible to build a building with a structure of four or more blocks, including the gable side and girder side. Since a column mounting seat is provided at the corner of the floor, and the corner column can be fixed by abutting against the flange, the assembly order is such that the corner column can be erected on the floor first, and the top of the corner column is attached to the roof. ζ Since we have provided a support pillar that can be inserted, we can place the corner pillar on the floor, insert the support pillar into the corner pillar, place the roof, and tighten the corner pillar and support pillar to make the structure strong, but the assembly in between is impossible. It's easy.

(1) The support pillars will not damage the ceiling or damage the lighting fixtures placed on the ceiling when the roof is placed on the ground during disassembly.

Also, pillars and panels can be stored between them. (9) Since flanges for panel mounting are provided on the inside of the corner columns and intermediate columns, each panel can be erected from the outside.If a packing is inserted between the mounting flanges of the panel and the column, the corner columns or It is easy to maintain watertightness because the watertightness is measured at the innermost part of the gap between the intermediate columns, where rain cannot reach from outside. Also, if you do this, you won't notice any discrepancies between the panels and the pillars, so the appearance will be better. Also, since the bolts that attach the panel to the pillars are screwed in from the inside, it is better protected from rain.

[Brief explanation of the drawing]

The drawings all show embodiments, and FIGS. 1 to 3 are three-sided views showing the assembled state. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. Figure 1 is a floor plan, Figures 5 to 12 show each unit, Figure 3 is a perspective view of the floor, and Figure 6 is a floor plan.
Figure 7 is a perspective view of the roof, Figure 7 is a perspective view of the corner pillar, Figure 1 is a front view of the window panel, Figure 7 is a front view of the sin panel,
Figure O is a front view of the equipment panel, Figure 1/ is a front view of the blind panel, Figure 72 is a perspective view of the intermediate column, Figure 73 is a plan view showing the connection between the floor and corner column, and Figure 11I is a front view of the blind panel. Fig. 73 is a partially sectional front view; Fig. 75 is a sectional view of the floor frame member;
Figure 6 is an enlarged sectional view taken along A-A in Figure 2, Figure 77 is an enlarged sectional view taken along line B-B in Figure 1, Figure 1g is a plan view showing the corner of the roof, and Figure 79 is an enlarged sectional view taken along the line B-B in Figure 1. a-C enlarged cross-sectional view; Figure 20 is a vertical cross-sectional view in the internal and external direction showing the attachment of the intermediate column to the floor;
Figure 22 is a horizontal cross-sectional view of the window panel, and Figures 23 and 23 are longitudinal cross-sectional views of the window panel in the internal and external directions. Figures 26 to 26 are plan views showing block-build architecture, Figure 27 is a detailed plan view of section D in Figures 21I to 26, Figure 2j is a sectional view of the floor at the block joint, Figure 29 is a sectional view of the end of the roof at the block joint, Figure 30 is a side view of Figure 29, Figure 31 is a plan view of Figure 30, and Figure 32 is the middle of the roof at the block joint. FIG. 33 is a side view of the stored block. L...Floor KoΦ・Roof 3...Corner pillar q-・Window panel Yoken/Sin Hanel 6・ΦEquipment panel Ri...Blind panel S@・Intermediate column 10@O panel 26...Spring pillar. Patent applicant: Fujisash Co., Ltd. Agent: Arai - Figure 29, Figure 3o

Claims (1)

[Claims] 1. A floor that is rectangular in plan and has an L-shaped pillar mounting seat erected at its corner into which a corner pillar can be inserted; A corner pillar having a panel mounting flange in a right angle direction on the inside side constituting the hollow part, and a roof having a support pillar that fits into the upper part of the corner pillar and can be attached to and removed from the corner pillar, and a rain gutter is provided on the upper surface of the outer periphery. , a knock consisting of an intermediate column that can be attached and detached at both ends to the roof and floor and has a panel attachment flange on the inside, and a panel that can be attached and detached from the outside between the columns to the attachment flanges of the built-in roof, floor and column. Down type mobile building.