Building and construction method of building

Abstract

To provide a building capable of reducing a used amount of wood while maintaining sufficient strength, and capable of being easily constructed.SOLUTION: A building comprises an outer building part of a steel structure and an inner building part housed in a nested state inside the outer building part, wherein the inner building part comprises a wooden frame structure, and the frame structure is composed of a combination of a through-column and a beam extended between the through-columns, a first joint part is arranged on a side face of the through-column, a second joint part is arranged on at least one end face of the beam, and the first joint part and the second joint parts are constituted so that the through-column and the beam can be joined together in a column-winning manner by joining the second joint part to the first joint part from the side face side, and an external height H2 (H2 / H1) from an installation surface to an upper end of the frame structure with respect to an internal height H1 from the installation surface of the building to the inside of a ceiling part of the outer building part satisfies 0.7-1.0.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a building and a construction method for a building. [Background technology]

[0002] Demand for housing has been increasing in recent years due to the spread of telecommuting, etc., which has been affected by the spread of SARS-CoV-2 (coronavirus disease). In addition, the impact of the infection and political instability have led to a shortage of containers for international logistics, and a sharp increase in container freight rates has led to a rise in transportation costs, which has resulted in a sharp increase in lumber prices in recent years.

[0003] Houses built using wooden frame construction (traditional construction) have traditionally been in high demand because the shape of the space can be designed relatively freely by adjusting the position of the pillars and beams (in other words, they have a high designability). However, because they make extensive use of wood, they have been greatly affected by the recent sharp rise in wood prices, making them expensive.

[0004] In order to meet the growing demand for housing in the current double whammy surrounding timber, with prices soaring and it becoming increasingly difficult to obtain them, there is a need to develop new designs for wooden houses that can reduce the use of timber while retaining the same freedom and design qualities as before.

[0005] As an example of such technology, Patent Document 1 describes "a wooden house characterized by a structure composed of vertical main columns made of steel erected on a slab so as to be located approximately in the center of the house to be built, a base disposed on the slab, joists made of steel arranged on the base, floor panels laid on the joists, exterior wall panels erected on the base, central joists made of steel erected between the exterior wall panels and the vertical main columns, and beams made of steel erected between the central joists and the exterior wall panels." [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 10-1479792 Summary of the Invention [Problem to be solved by the invention]

[0007] The wooden house described in Patent Document 1 uses both steel and wood for its structural members, which makes the structure complicated overall, and the construction method and assembly are also special. Therefore, new training for construction technicians is required for design and construction, and it was not able to quickly respond to the increasing demand for housing and the soaring prices of wood.

[0008] Therefore, an object of the present invention is to provide a building that can be constructed easily while maintaining sufficient strength and reducing the amount of wood used. Another object of the present invention is to provide a construction method. [Means for solving the problem]

[0009] As a result of intensive research by the present inventors to solve the above problems, they have found that the above problems can be solved by the following configuration.

[0010] [1] A building comprising an outer building section of steel frame construction and an inner building section nested inside the outer building section, the inner building section having a wooden frame structure, the frame structure being constructed by combining through columns and beams that are spanned between the through columns, a first joint section being arranged on the side of the through columns and a second joint section being arranged on at least one end face of the beam, the first joint section and the second joint section being configured such that the through columns and the beams can be joined together column-to-column by the second joint section being joined to the first joint section from the side, and an outer height H2 (H2 / H1) from the installation surface of the building to the upper end of the frame structure relative to an inner height H1 from the installation surface of the building to the inside of the ceiling of the outer building section satisfies 0.7 to 1.0. [2] The building described in [1], wherein the first joint portion is at least one selected from the group consisting of a tenon and a mortise hole arranged on the side surface, and the second joint portion is a mortise hole or a tenon arranged on the end surface and paired with the first joint portion. [3] A construction method for a building comprising an outer building section of steel frame construction and an inner building section of a wooden frame structure nested inside the outer building section, the construction method comprising: installing the outer building section; and assembling the frame structure inside the outer building section, the assembly of the frame structure being carried out using a through column having a first joint section arranged on a side surface and a beam having a second joint section on at least one end surface, the second joint section being connected to the first joint section from the side surface side to connect the through column and the beam together, wherein the ratio of the inner height H1 from the installation surface of the building to the inside of the ceiling section of the outer building section to the outer height H2 (H2 / H1) from the installation surface to the upper end of the frame structure satisfies 0.7 to 1.0. [4] The construction method for a building described in [3], wherein the first joint portion is at least one selected from the group consisting of a tenon and a mortise hole arranged on the side surface, and the second joint portion is a mortise hole or a tenon arranged on the end surface and paired with the first joint portion.

[0011] Further, other embodiments of the present invention are as follows. [1] A building comprising an outer building section of steel frame construction and an inner building section nested inside the outer building section, the inner building section having a wooden frame structure, The frame structure is formed by combining through columns and beams that are spanned between the through columns, the through columns have side mortises that open on the sides, and the beams have end tenons on at least one end face that are inserted into the side mortise, and the end tenons are inserted into the side mortise, so that the through columns and the beams are combined with each other to form the frame structure, in a building. [2] The building described in [1], wherein the upper end surface of the through column and the upper end surface of the beam are configured to be approximately flush with each other. [3] The building described in [2], wherein the outer height H2 (H2 / H1) from the installation surface of the building to the upper end of the frame structure satisfies 0.8 to 1.0 relative to the inner height H1 from the installation surface of the building to the inside of the ceiling of the outer building section. [4] The building described in [3], wherein the outer building portion has a first opening on the side communicating with the external space, and a door is installed in the first opening. [5] The outer building portion and the inner building portion each have an approximately rectangular prism-like outer shape, and when viewed from the first opening side, the width W2 of the inner building portion is smaller than the width W1 of the first opening, and there is a space beside the inner building portion. The building described in [4], wherein the inner building portion has an entrance / exit to the inner building portion on the side facing the space. [6] The building described in [5], wherein the difference between the width W1 and the width W2 is sufficient to allow vehicles to enter and exit, and the space constitutes a parking space for the vehicle. [7] The building described in [6], wherein the outer building portion has no windows. [8] A construction method for a building comprising an outer building section of steel frame construction and an inner building section of a wooden frame structure nested inside the outer building section, comprising: installing the outer building section; and assembling the frame structure inside the outer building section, wherein the frame structure is assembled using a through column having a side mortise that opens onto a side surface, and a beam having an end tenon on at least one end surface that is inserted into the side mortise, by inserting the end tenon into the side mortise and combining the through column and the beam with a column joint. [9] A construction method for a building described in [8], in which the frame structure is assembled so that the upper end surfaces of the through columns and the upper end surfaces of the beams are approximately flush with each other. Effect of the Invention

[0012] According to the present invention, a building that can be constructed easily while maintaining sufficient strength and reducing the amount of wood used is provided. The present invention also provides a construction method. [Brief description of the drawings]

[0013] [Figure 1] 1A is a front view, FIG. 1B is a right side view, and FIG. 1C is a rear view of the exterior of a building according to an embodiment of the present invention. [Diagram 2] Fig. 2 is an explanatory diagram of the exterior of a building according to an embodiment of the present invention, in which the door (shutter) of the first opening of the outer building section is open. Fig. 2(A) is a front view, and Fig. 2(B) is a right side view. [Diagram 3] FIG. 1 is a floor plan of a building according to an embodiment of the present invention. [Figure 4] FIG. [Diagram 5] Fig. 5(A) is a perspective view of the joint between a through-column and a beam, Fig. 5(B) is an exploded view of the joint, Fig. 5(C) is an AA cross-sectional view, and Fig. 5(D) is an exploded view of the joint. [Figure 6] FIG. 1 is a schematic diagram showing a general procedure (conventional example) for assembling columns and beams. [Figure 7] An explanatory diagram of the joints of the frame structure of the inner building section. [Figure 8] 1 is a flow chart of a preferred method for constructing a building of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be described in detail below. The following description of the components may be based on a representative embodiment of the present invention, but the present invention is not limited to such an embodiment. In this specification, a numerical range expressed using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits.

[0015] The embodiment shown below is an example that embodies the technical idea of ​​the present invention, and the technical idea of ​​the present invention does not limit the materials, shapes, structures, and arrangements of the components to the following embodiment. The drawings are schematic. Therefore, the relationship and ratio between thickness and planar dimensions may differ from the actual ones, and the relationship and ratio between dimensions may differ between the drawings.

[0016] The building of the present invention is a building comprising an outer building section made of steel and an inner building section nested inside it, the inner building section having a wooden frame structure, the frame structure being formed by combining through columns and beams that are spanned between the through columns, the through columns having side mortises that open on the sides, the beams having end tenons on at least one end face that are inserted into the side mortises, the end tenons being inserted into the side mortises, and the through columns and beams being combined with each other to form the frame structure.

[0017] The present inventors have been aware that if the use of steel materials in combination with timber as described in Patent Document 1 is adopted as a method for reducing the amount of timber used in the construction of wooden houses, the structure of the entire building becomes complicated, special metal fittings (such metal fittings are generally expensive), and the skilled workers in charge of the construction require special training and skills (skilled workers are difficult to secure), resulting in problems such as not meeting the cost requirements of today's housing and making it difficult to carry out construction quickly.

[0018] Therefore, we decided to change our conventional thinking and came up with the idea of ​​separating the steel framed and wooden parts of a single building, rather than using a combination of steel and wood as described above. Specifically, we thought that we could solve all of the above problems by completely covering the wooden inner building part with the steel framed outer building part. For the sake of convenience, we will refer to buildings based on this idea as "double-layered buildings" below.

[0019] The inventors thought that in a double-storey building, the strength of the entire building could be provided by the sturdy steel-framed outer building section, with the wooden inner building section nested inside, and that all of the problems would be solved if each of the outer and inner building sections had a standard structure and could be constructed using standard construction methods.

[0020] However, when a new building design was carried out based on the above concept, a new problem was discovered. This new problem will now be explained with reference to the drawings. Figure 6 is a schematic diagram showing a general procedure for assembling a column and a beam. Among these, the joint part 60 in Figure 6(A) is a schematic diagram of a case where a column 61 having a tenon part 63 at the upper end and a beam 62 having a mortise hole 64 on the side (lower surface) are assembled with the beam joint.

[0021] 6(A), in order to insert a tenon 63 arranged at the upper end of a pillar 61 into a mortise hole 64 arranged on the underside of a beam 62, the beam 62 is fitted into the upper end of the pillar 61 from vertically above the pillar 61 in the direction of arrow ar1. After this, the beam 62 may be further struck from vertically above with a hammer 65 to firmly fix the joint 60.

[0022] When forming the joint 60 in this manner, the beam 62 needs to be fitted into the column 61 from above, and if necessary, it needs to be struck with a hammer 65, so a certain amount of working space is required above the beam 62. When constructing a frame structure inside the outer building section using such a conventional construction method to construct a double-layered building, a distance ds1 from the ceiling 70 of the outer building section to the top of the frame structure is necessary for the work. This distance ds1 may be, for example, several tens of centimeters to 1.5 meters.

[0023] Fig. 6(B) is a schematic diagram of a column joint using the metal joint construction method (conventional construction method). A metal joint 66 (such as a "Kretec metal joint") is attached to the upper end of the side of column 61. Meanwhile, a groove 67 is formed on the underside of beam 62 so that metal joint 66 can fit into it. Metal joint 66 fits into groove 67, and column 61 and beam 62 are fastened together by bolts, pins, etc. When combining the column 61 and the beam 62 using this method, the beam 62 is fitted into the metal fitting 66 from above the column 61 (in the direction of the arrow ar2), and is struck with a hammer 65 as necessary. Therefore, as in the case of Fig. 6(A), a distance ds2 from the ceiling 70 to the upper end of the frame structure is necessary for the assembly work.

[0024] In order to nest the inner building section inside the outer building section, it is more efficient to construct the outer building section first, and then the inner building section. This is because once the outer building section has been constructed, the inner building section can be easily constructed without being affected by weather conditions such as rainfall, and this is expected to shorten the construction period.

[0025] However, as mentioned above, in wooden buildings constructed using conventional methods, a clearance is required between the ceiling section 70 and the frame structure, and this clearance becomes dead space after construction (completion), resulting in the problem of reducing the volume of the inner building section (volume of the living space). This issue was first identified when we came up with the idea of ​​a dual-layered building, in which the steel frame section and the wooden section are separated within a single structure, and actually went on to design this.

[0026] One of the features of the building of the present invention that solves the above-mentioned problems is the structure of the joints in the wooden frame structure of the inner building portion.

[0027] 7 is an explanatory diagram of the joint of the frame structure of the inner building portion of the present invention. The through column 31 and the beam 32 are assembled by fitting the side mortise 50 (first joint portion) and the end tenon 51 (second joint portion). At this time, the through column 31 and the beam 32 can be fitted together by being pushed into each other in the lateral direction (in the direction of the arrow ar3). Even if it is necessary to hit with a hammer 65 or the like as needed, it is only necessary to hit in the direction of the arrow ar3 (or the opposite direction), so there is no need to provide a clearance for work between the ceiling portion 70 and the upper end of the frame structure 30.

[0028] In the above example, the first joint portion is configured as a side mortise 50 and the second joint portion is configured as an end mortise 51, but the embodiment of the building (frame structure) of the present invention is not limited to the above. For example, the first joint part may be a "tenon" provided on the side surface of the through column 31, and the second joint part may be a "mortise hole" provided on the end surface of the beam 32 and having a shape corresponding to the "tenon." Also, a joint metal fitting having a similar function may be used in place of the "tenon" and "mortise hole." In either case, any of the connection structures used in general frame construction methods can be adopted so long as the structure allows the second joint part to be passed through and connected to the first joint part from the side of the column 31 so that the column wins.

[0029] The beams in this specification correspond to the rafters in a typical wooden house. However, in the double-story building of the present invention, the wooden frame structure does not support the roof (because the outer building section supports the roof), so its function is different from that of a conventional rafter. However, the location in which it is installed (bridged over the top of the pillars) is the same.

[0030] Furthermore, as will be described in detail later, the upper end surfaces of the through columns 31 and the upper end surfaces of the beams 32 are nearly flush (line L1 in Figure 7(A)), which has the effect of bringing the ceiling 70 of the steel-framed outer building section and the upper end of the frame structure closer together, thereby making it possible to increase the living volume of the inner building section partitioned by the frame structure.

[0031] Generally, the joints shown in Figures 6(A) and 6(B) are used with the aim of ensuring a certain level of strength for the frame structure. In the building of the present invention, the inner building section is nested (completely covered) by the outer building section, which is made of steel and is expected to have a certain strength. Therefore, the strength of the entire building can be borne by the outer building section, and even with the above-mentioned joints, the building as a whole has sufficient strength.

[0032] Next, a specific example of the building of the present invention will be described with reference to the drawings. Figure 1 is an explanatory diagram of the exterior of one embodiment of the building of the present invention (hereinafter, also referred to as "this building"). Of these, Figure 1(A) is a front view, Figure 1(B) is a right side view, and Figure 1(C) is a rear view. In addition, Fig. 2 is an explanatory diagram of the exterior of the building, showing the state in which the door (shutter) of the first opening of the outer building part is open. Of these, Fig. 2(A) is a front view, and Fig. 2(B) is a right side view. Coordinate axes are also shown in each figure.

[0033] The building 100 is a one-story building constructed by nesting an inner building section 20 with a wooden frame structure inside an outer building section 10 made of steel. The building of the present invention may be two or more stories high, in which case the outer building section 10 may be one story high and the inner building section 20 may be two or more stories high. However, from the viewpoint of further reducing the amount of wood used, a building having one story overall, with both the outer building section 10 and the inner building section 20 being one story high, is preferred.

[0034] The outer building section 10 has three walls without windows on the sides and back, a first opening op1 on the front, and a roof 11. The outer building section 10 is of steel frame construction, with frameworks such as columns and beams made of steel, and most of the walls and roof 11 also made of steel plates (painted steel plates) or the like. In this specification, the term "steel frame construction" refers to a structure in which the structural members are made of steel, and is used to include both light steel frame construction and heavy steel frame construction.

[0035] The outer building section 10 has an approximately rectangular prism-like external shape, with four walls and a flat roof 11. The roof 11 has a downward slope from the front side to the back side, but it does not have to have a slope. It does not have to be a single-pitch roof, and can be any of a gable roof, sawtooth roof, flat roof, and maneki-zukuri style roof. A first opening op1, whose width is slightly narrower than the width of the outer building section 10, is disposed in front of the outer building section 10. The first opening op1 can be opened and closed by three shutters 13a, 13b, and 13c and removable supports 14 that support them.

[0036] On the other hand, no openings including windows are arranged on the opposing back surface 16 and side surface 12. Therefore, as shown in Figs. 1(A) to (C), when the first opening op1 is closed by the shutters 13a, 13b, and 13c, the inner building section 20 cannot be seen from the outside. With this configuration, when the first opening op1 is closed, there is almost no intrusion route from the outside, so the building 100 has excellent crime prevention performance. Note that the number of openings in the outer building section in the building of the present invention is not limited to one, and there may be multiple openings. In addition, other openings such as windows and entrances may be formed on the back surface 16 and side surface 12.

[0037] An air vent 15 (duct) that communicates with the external space (communicating inside and outside) is arranged on the back surface 16 of the outer building section 10. The number of air vents 15 is not limited to one, and multiple air vents 15 may be arranged. In addition, the location of the air vents may be a location other than the back surface 16 (for example, the side surface 12). On the other hand, arranging the ventilation hole 15 on the back surface 16 is preferable in that ventilation from the first opening op1 to the ventilation hole 15 is easily ensured.

[0038] The outer building section 10 may be, for example, a prefabricated prefabricated shed, a warehouse, a garage, etc. The outer building section 10 of the building 100 is a (lightweight) steel-framed garage that can park three vehicles side-by-side in the sections corresponding to the shutters 13a, 13b, and 13c.

[0039] In the front view of Fig. 2(A), the shutters 13a, 13b, 13c of the first opening op1 are open, and when viewed from the front, the inner building portion 20 placed on the foundation member 22 can be seen. As is clear from Figs. 2(A) and (B), the inner building portion 20 has an approximately rectangular prism-like outer shape, and is nested within the outer building portion 10. The foundation member 22 serves as an independent foundation for the inner building section 20, and the outer building section 10 is placed on a separate foundation member (not shown).

[0040] The inner building portion 20 has a wall 21 on the front side (first opening op1), and windows 23, 24 are arranged in the wall 21, and an entrance (second opening) is arranged on the side facing the space Sp. A width W2 of the inner building portion 20 in a front view is configured to be narrower than a width W1 of the first opening op1 in the front view. In the building 100, the width W2 / width W1 is configured to be approximately 2 / 3, and the remaining 1 / 3 is the space Sp. Note that the above is just an example, and the width W1 and the width W2 may be approximately the same. In this case, there is no space Sp, and the inner building portion 20 can be made larger.

[0041] The difference between the width W2 and the width W1 (the width of the space Sp) is not particularly limited, but it is preferable to set this width to an extent that allows vehicles to enter and exit, so that the space Sp can be used as a parking space. In addition, the space Sp is located on the right side of the inner building portion 20 when viewed from the front, but is not limited to this location and may be located on the left side of the inner building portion 20.

[0042] The relationship between the height H2 (exterior height) from the installation surface G to the upper end of the inner building portion 20 and the height H1 (interior height) from the installation surface G to the lower end of the ceiling portion of the outer building portion 10 is not particularly limited, but it is preferable that the exterior height H2 to the interior height H1 (H2 / H1) satisfies 0.5 to 1.0, more preferably 0.7 to 1.0, even more preferably 0.8 to 1.0, and particularly preferably 0.9 to 1.0. As already explained, the distances ds1 and ds2 in Fig. 6 may be several tens of centimeters to about 1.5 m. In general, the interior height H1 of a steel-framed prefabricated garage that can accommodate three passenger cars is often about 3 m. Therefore, when reusing a steel-framed prefabricated garage as the outer building section 10, if H2 / H1 is 0.7 or more, H1 will be about 2.1m, which is a sufficient height for a single-story space. Reusing a steel-framed prefabricated garage is preferable in terms of shortening the construction period and reducing construction costs. If H2 / H1 is within the above numerical range, the space inside the outer building portion 10 can be utilized more effectively, in other words, the volume of the inner building portion 20 can be increased, which is preferable.

[0043] 3 is a floor plan of the building 100. The outer building section 10 of the building 100 is made of steel and has no internal columns, and houses an inner building section 20 within the space. The inner building section 20 is a structure that can be constructed by conventional construction methods and includes a wooden frame structure and wall panels, which will be described later. The inner building section 20 is a residence having an entrance 201, a living / dining room 202, a storage room 203, a toilet 204, a kitchen 205, a refrigerator area 206, a storage room 207, a Western-style room 208, a bathroom / dressing room 209, and a bathroom 210. Note that the layout of the inner building section 20 is an example, and the layout may be other than the above, or the interior may be other than a residence. The inner building portion 20 has windows 23, 24 on the front side and windows 25, 26 on the side side facing the space Sp, and further has a second opening op2 which serves as an entrance / exit, and the second opening op2 can be opened and closed by a door 27.

[0044] The width (W1-W2) of the space Sp when viewed from the front is set to allow the vehicle 28 to enter and exit, and it is used as a parking space. The second opening op2 of the inner building portion 20 faces the space Sp, so that the vehicle 28 can get on and off under the roof 11. This is preferable because the vehicle can get on and off without getting wet even in rainy weather. Also, by closing the first opening op1 of the outer building portion 10, it is possible to prevent easy intrusion from the outside, and theft of the vehicle 28 can also be prevented.

[0045] Next, the frame structure of the inner building portion 20 will be described. 4 is a perspective view of a frame structure 30 of the inner building section 20. This frame structure 30 is simplified for the purpose of explanation, and in reality, an actual frame structure is constructed by combining a plurality of frame structures 30 as shown in the figure side by side, with each unit being one unit. In addition, when adjacent units are arranged side by side, the through columns 31 and beams 32, etc. may be shared between the adjacent units as appropriate.

[0046] The frame structure 30 includes a plurality of through columns 31 and beams 32 spanning between the through columns 31. The through columns 31 are each placed on a lower base 33, and pipe columns 34 are placed at approximately equal intervals between the base 33 and the beams 32. In addition, joists 35 are placed across the opposing surfaces of the base 33. Each part may be reinforced with metal fittings or the like (not shown).

[0047] Fig. 5 is an explanatory diagram of a joint portion between a through column 31 and a beam 32 in a frame structure 30. Fig. 5(A) is a perspective view of the joint portion, Fig. 5(B) is an exploded view thereof, Fig. 5(C) is an AA cross-sectional view thereof, and Fig. 5(D) is an exploded view thereof.

[0048] One of the characteristic features of the frame structure 30 is that the through column 31 has a side mortise 50 opening on its side, the beam 32 has an end tenon portion 51 on its end face, and when the end tenon portion 51 is inserted into the side mortise 50 and the through column 31 and the beam 32 are combined with each other, the upper end surface 41 of the through column 31 and the upper end surface 42 of the beam are configured to be approximately flush with each other. In the drawings, the end tenon portion 51 is rectangular, but is not limited to this and may be a known "tenon" shape. The same is true for the side mortise hole that fits with this.

[0049] The frame structure 30 of the inner building section 20 is configured such that the end tenon 51 of the beam is inserted into the side mortise 50 of the through column 31, and the through column 31 and the beam 32 are assembled with the columns together, eliminating the need for space for assembly above the through column 31 and the beam 32. This allows the outer height H2 of the frame structure 30 to be closer to the inner height H1 of the ceiling section 70 of the outer building section 10, and the volume of the inner building section 20 can be made larger. In this building, the steel-framed outer building section 10 provides most of the strength of the entire building, making it possible to adopt the above-mentioned joints, thereby making it possible to increase the volume of the inner building section 20. In addition, by configuring the upper end surface 41 of the through column and the upper end surface 42 of the beam to be almost flush, the dead space is reduced, making it possible to arrange a larger (large volume) inner building section 20. Note that the upper end surface 41 of the through column and the upper end surface 42 of the beam do not have to be flush.

[0050] As described above, in the building 100, the outer building section 10 and the inner building section 20 form a nested structure, and the outer building section 10 is made of steel, thereby achieving a reduction in the amount of wood used while maintaining sufficient strength for the building as a whole. As mentioned above, the outer building portion 10 of the building 100 can be a prefabricated warehouse, carport, or garage. The inner building portion 20 has its own unique joints, but the manufacturing (precutting) and assembly of the lumber is not very different from that of conventional construction methods. This allows for a reduction in the amount of lumber used, and construction can be carried out by ordinary skilled workers without the need for special training or experience.

[0051] (Construction method) The construction method of the building of the present invention is not particularly limited, and the outer building section 10 may be constructed first, and then the inner building section 20 may be constructed inside it, or the inner building section 20 may be constructed first, and then the outer building section. Also, the outer building section 10 and the inner building section 20 may be constructed simultaneously. In particular, from the viewpoint of making it easier to construct a building, it is preferable to construct the outer building section 10 first and then construct the inner building section 20 inside it.

[0052] Fig. 8 is a flow chart of a preferred construction method for the building of the present invention. First, in step S11, the outer building section 10 is constructed. The construction method for the outer building section 10 is not particularly limited, and any known method can be applied. For example, a method of installing foundation members on the installation surface G and then installing steel columns and the like on top of the foundation members in sequence and assembling them can be mentioned. Incidentally, the foundation member of the outer building section 10 may be integral with the foundation member of the inner building section 20, but it is preferable that they are separate.

[0053] When the foundation members of the outer building portion 10 are separate from those of the inner building portion 20, it is preferable to construct the foundation members of the inner building portion 20 after completion of construction of the outer building portion 10 in step S11. When constructing the foundation members of the inner building portion 20, if most of the outer building portion 10 (particularly the roof 11 and doors) have already been completed, construction that is dependent on weather (particularly rainy weather) can be carried out, and it is expected that the construction period can be shortened.

[0054] Next, in step S12, the frame structure 30 of the inner building section 20 is constructed. At this time, the entire frame structure 30 of the inner building section 20 may be constructed at the same time, but it is preferable to divide it into units of a predetermined size and construct each unit separately. In particular, construction can be made easier by starting with the unit that is to be placed at the farthest location (back side) from the first opening op1 of the outer building portion 10. As already explained, the beams 32 of the frame structure 30 are fitted laterally into the fixed through columns 31, so by constructing (fixing) the units at the back first, construction of the units at the front becomes easier.

[0055] Next, in step S13, finishing is performed on the inner building portion 20. The finishing includes, but is not limited to, the installation of ceiling panels, wall panels, and heat insulating materials. According to the above construction method, the outer building section 10 is constructed first, so that construction of the inner building section 20 can be carried out quickly regardless of subsequent weather conditions, etc. [Explanation of symbols]

[0056] 10 outer building part, 11 roof, 12 side, 13a shutter, 13b shutter, 13c shutter, 14 support, 15 vent, 16 back, 20 inner building part, 21 wall, 22 foundation member, 23 window, 24 window, 25 window, 26 window, 27 door, 28 vehicle, 30 frame structure, 31 through column, 32 beam, 33 foundation, 34 pipe column, 35 joist, 50 side mortise, 51 end tenon, 60 joint, 61 column, 62 beam, 63 tenon, 64 tenon, 65 hammer, 66 joint metal, 67 groove, 70 ceiling part, 100 building

Claims

1. The outer building is made of steel. An inner building section nested inside the inner building section, The inner building portion has a wooden frame structure, The frame structure is configured by combining through columns and beams that are spanned between the through columns, A first joint portion is arranged on a side surface of the through column, and a second joint portion is arranged on at least one end surface of the beam, The first joint portion and the second joint portion are configured so that the second joint portion can be connected to the first joint portion from the side surface side to connect the through column and the beam together, A building in which the inner height H1 from the installation surface of the building to the inside of the ceiling of the outer building section, and the outer height H2 (H2 / H1) from the installation surface to the upper end of the frame structure, satisfy 0.7 to 1.

0.

2. 2. The building of claim 1, wherein the first joint portion is at least one selected from the group consisting of a tenon and a mortise hole arranged on the side surface, and the second joint portion is a mortise hole or a tenon arranged on the end surface and paired with the first joint portion.

3. The outer building is made of steel. A method for constructing a building comprising: an inner building portion having a wooden frame structure nested inside the inner building portion; Installing the outer building section; and assembling the frame structure inside the outer building section, The assembly of the frame structure includes: A through pillar having a first joint portion disposed on a side surface thereof; a beam having a second joint portion on at least one end surface, The second joint portion is connected to the first joint portion from the side surface side to connect the through column and the beam to each other. A construction method for a building, in which an outer height H2 (H2 / H1) from the installation surface of the building to the upper end of the frame structure satisfies 0.7 to 1.0 with respect to an inner height H1 from the installation surface of the building to the inside of the ceiling part of the outer building part.

4. 4. The method for constructing a building according to claim 3, wherein the first joint portion is at least one selected from the group consisting of a tenon and a mortise hole arranged on the side surface, and the second joint portion is a mortise hole or a tenon arranged on the end surface and paired with the first joint portion.

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