JP2012072543A - Ancillary structure and unit building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized ancillary structure connected to a unit building in which an opening such as a roof light window can be freely installed without decreasing structural resistance in a ceiling surface.SOLUTION: A small-sized ancillary structure 10, connected to a raised surface in a building unit 1 of rectangular parallelepiped shape composing a unit building and expanding an interior space of the building unit, comprises four column materials 11, four lower beams 12,13 for connecting the lower ends of the column materials in the horizontal direction, and four upper beams 14,15 for connecting the upper ends of the column materials in the horizontal direction, to be composed in a rectangular parallelepiped shape, and is connected and fixed to members constituting a raised surface of the building unit 1. In the ancillary structure 10, auxiliary beams 17,17 are provided on the ceiling surface of the rectangular parallelepiped along the upper beams in the short-side direction, and horizontal brace materials 18,18 are provided between the auxiliary beams 17 and the column materials 11 as structural members.

Description

  The present invention relates to a small incidental structure connected to a building unit constituting a unit building, and in particular, an incidental that can freely provide an opening such as a skylight without reducing the structural strength of the incidental structure. Concerning structures and unit buildings.

  Conventionally, a small unit can be connected to this type of building unit, and a bay window, sanitary, etc. can be provided outside the building. There is an overhang unit that can realize. This overhang unit consists of a framed structure in which columns, floor beams, and ceiling beams are joined. The overhang unit is installed on the side of the lower unit installed on the foundation and the upper floor mounted on the upper part of the lower unit. It is joined to the side part of the unit. (For example, refer to Patent Document 1).

JP-A-4-360933

  By the way, in the overhang unit of the said structure, about providing a skylight and an opening part in a ceiling surface, the size and installation position were limited. In addition, the small rectangular parallelepiped structure that is attached to and connected to the conventional building unit is designed to follow the building unit and has a flexible structure, and its ceiling surface is flexible and free. Could not be provided with openings such as skylights.

  The present invention has been made in view of such problems, and the object of the present invention is to reduce the structural strength of the ceiling surface of a small incidental structure connected to a building unit constituting a unit building. An object of the present invention is to provide an incidental structure in which an opening such as a skylight can be freely provided without being lowered. It is another object of the present invention to provide a unit building in which an incidental structure configured in this manner is connected to a building unit and an opening can be freely provided on the ceiling surface of the incidental structure.

  In order to achieve the above object, the incidental structure according to the present invention is a small incidental structure that is connected to an elevation surface of a rectangular parallelepiped building unit constituting a unit building and expands the internal space of the building unit. The incidental structure includes four column members, four lower beams connecting the lower end portions of the column members in the horizontal direction, and four upper beams connecting the upper end portions of the column members in the horizontal direction. Are formed in a rectangular parallelepiped shape, and are connected and fixed to members constituting the elevation surface of the building unit, and the incidental structure is further provided on the ceiling surface of the rectangular parallelepiped along the upper beam in the short side direction. An auxiliary beam is provided, and a horizontal brace material is provided between the auxiliary beam and the structural member. As the structural member, a pillar material or a beam material is preferable.

  In the incidental structure of the present invention configured as described above, an auxiliary beam is provided along the short side direction on the ceiling surface of the incidental structure formed in a rectangular parallelepiped, and a horizontal brace is provided between the auxiliary beam and the structural member. Since the material is provided, the structural strength of the ceiling surface can be increased, and an opening such as a skylight can be freely provided on the ceiling surface. In other words, along the short side direction of the rectangle that constitutes the ceiling surface, the auxiliary beam is provided side by side with the upper beam in the short side direction, and is reinforced with horizontal brace material. Adjacent openings can be provided freely.

  In addition, as a preferred specific aspect of the incidental structure according to the present invention, a plurality of the auxiliary beams are provided in parallel to the two upper beams in the short side direction constituting the ceiling surface. . In the incidental structure configured in this way, since the plurality of auxiliary beams are provided in parallel to the upper beams of the two short sides of the elongated rectangular ceiling surface, the structural strength of the ceiling surface can be increased. An opening such as a skylight can be freely provided between the plurality of auxiliary beams.

  Furthermore, another aspect of the incidental structure according to the present invention is a small incidental structure that is connected to an elevation of a rectangular parallelepiped building unit that constitutes a unit building and expands the internal space of the building unit. The incidental structure includes four column members, four lower beams connecting the lower end portions of the column members in the horizontal direction, and four upper beams connecting the upper end portions of the column members in the horizontal direction. Are formed in a rectangular parallelepiped shape, and are connected and fixed to members constituting the elevation surface of the building unit, and the incidental structure is further provided on the ceiling surface of the rectangular parallelepiped along the upper beam in the short side direction. An auxiliary beam is provided, and the auxiliary beam is connected to the upper beam in the long side direction by a rigid joint. As rigid joining, joining by welding, connection by a high-strength bolt, etc. are preferable. In the incidental structure configured in this way, the auxiliary beam is rigidly connected to the upper beam in the long side direction, so that the structural strength of the ceiling surface of the incidental structure can be increased by this auxiliary beam. Even if an opening is provided between the beams, deformation of the ceiling surface can be suppressed, and a skylight or the like can be stably provided.

  In the incidental structure according to the present invention, the two facing surfaces of the rectangular parallelepiped are rigid joint surfaces in which the two column members, the upper beam and the lower beam are rigidly joined, and the other two facing surfaces facing each other are 2 It is preferable that the column member of the book and the upper beam and the lower beam are connected and formed via a joint member by a fixture such as a bolt and nut. According to this configuration, the two upright surfaces facing each other are rigid joint surfaces, and the two beams are connected to the upper beam and the lower beam by the fixture via the joint member, thereby facilitating the incidental structure. Can be built.

  Further, in the incidental structure of the present invention, the four column members are made of channel steel or C-shaped steel having a substantially U-shaped cross section, and the joint member is an opening of the channel steel or C-shaped steel. Preferably, a fastening space for a fixture such as a bolt and nut is formed on the back side of the joint member. According to this structure, a small incidental structure can be manufactured at a low cost with a light weight, and can be easily connected by a fixture.

  In the incidental structure, one of the upper beam and the lower beam is rigidly joined to the two column members, and the other is connected to the two column members by the fixtures, in the two vertical surfaces facing each other. Is preferred. According to this configuration, the structure of the incidental structure can be made partly flexible to easily follow the connected and fixed building unit, and even when an impact such as an earthquake is applied, the impact can be absorbed together with the building unit. .

  In the incidental structure, it is preferable that the four lower beams and the four upper beams are connected to the four column members by a fixture such as a bolt and nut. According to this configuration, the four lower beams and the four upper beams are flexibly configured because they are connected to the four column members by the fixtures such as bolts and nuts via the joint members, and the buildings to be connected. In order to follow the unit, even when an impact such as an earthquake is applied, the impact can be absorbed together with the building unit.

  It is preferable that the incidental structure is connected and fixed to the two column members of the building unit via a guide member. According to this structure, an incidental structure can be positioned with a guide member, and can be easily connected and fixed to a building unit. The unit building according to the present invention is characterized in that any of the incidental structures described above is connected and fixed to the building unit. In the unit building configured as described above, an opening such as a skylight can be formed on the ceiling surface of a small incidental structure connected and fixed to the building unit without reducing structural strength.

  The incidental structure of the present invention can reduce the weight with a simple configuration, and is connected and fixed to the building unit constituting the unit building, thereby reducing the internal space of the building unit with a small increase in weight. In addition to being able to expand with an increase in cost, a skylight can be freely provided on the ceiling surface of the incidental structure. In addition, by connecting and fixing the incidental structure of the present invention to a unit building formed by juxtaposing or overlapping a plurality of building units, the appearance of the unit building can be changed, and the appearance of the uneven and heavy appearance can be increased. A unit building can be formed, and external light can be taken into the unit building.

The perspective view of the building unit to which the incidental structure which concerns on this invention is connected and fixed. The perspective view of one Embodiment of the incidental unit connected and fixed to the building unit of FIG. 2 shows a state in which the incidental unit in FIG. 2 is connected and fixed to the building unit in FIG. 1, (a) is a side view of the main part in which the incidental unit is connected to the building unit on the second floor, and (b) is the building unit on the first floor. The principal part side view which connected the incidental unit. The principal part perspective view of the state which decomposed | disassembled the A section of FIG. The top view which follows the VV line | wire of FIG. FIG. 6 is an elevation view from the VI-VI line direction of FIG. 5. VII-VII line sectional drawing of FIG. The perspective view of the state which showed other embodiment of the incidental structure which concerns on this invention, and was connected and fixed to the building unit. The state which connected the incidental unit which concerns on this invention to the unit building is shown, (a) is a principal part perspective view which connected the incidental unit to the short side direction and long side direction of one building unit, (b) is two buildings The perspective view of the main part which connected one incidental unit to the short side direction of the 1st floor of the unit building which made the unit 2 layers, (c) is the point which connected one auxiliary unit to the short side direction of the 2nd floor of the unit building FIG. 4D is a perspective view of a main part in which two auxiliary units are vertically connected in the short side direction of the first floor and the second floor of the unit building, and FIG. 5E is 1 in the long side direction of the first floor of the unit building. The principal part perspective view which connected one incidental unit, (f) is the principal part perspective view which connected one incidental unit in the long side direction of the 2nd floor of a unit building. The state which connected the incidental unit which concerns on this invention to the unit building is shown, (a) is the principal part which overlapped and connected the incidental unit on the 1st and 2nd floor in the long side direction of the unit building which made two building units into two layers. A perspective view, (b) is a perspective view of a main part in which one auxiliary unit is connected in the long side direction of the first floor of a unit building, and a balcony is installed thereon, and (c) is a two-layer structure with two building units. In addition, a perspective view of the main part in which one auxiliary unit is connected in the short side direction of the first floor of the unit building in which the building units are arranged on the first floor, (d) is the first floor of the unit building having two building units in two layers. The main part perspective view which connected the incidental unit for short sides to the long side direction of a building unit, (e) is continuous in the short side direction of two building units on the first floor of the unit building which made two building units into two layers. Connect the accessory units to Partial perspective. The principal part top view which shows other embodiment of the incidental structure which concerns on this invention. The principal part perspective view of the state which decomposed | disassembled other embodiment of an incidental structure. The principal part perspective view of the state which decomposed | disassembled other embodiment of an incidental structure. The principal part perspective view which shows the modification of the connection structure of a column material and a beam material. The principal part perspective view of the state which decomposed | disassembled another embodiment of an incidental structure.

  Hereinafter, one embodiment of an incidental structure concerning the present invention is described in detail based on a drawing. First, the building unit 1 for connecting and fixing the incidental structure will be described. 1 and 2, the building unit 1 has a box ramen structure formed by joining steel structural members into a rectangular parallelepiped shape by welding, and includes four column members 2, 2,. Long side direction lower beams (floor beams) 3, 3 connecting the lower ends of the column materials in the horizontal direction, short side direction lower beams (floor beams) 4, 4, and four column materials 2, 2, ... Are formed in a rectangular parallelepiped shape from upper beams (ceiling beams) 5 and 5 in the long side direction and upper beams (ceiling beams) 6 and 6 in the short side direction. In the building unit 1, floor joists 7, 7... Are installed between the lower beams 3 and 3 at a predetermined interval, and ceiling joists 8, 8. Each column member and each beam member are welded with reinforcing plates 9, 9... Interposed at the corners to enhance the rigidity of the building unit 1.

  In the rectangular parallelepiped of the building unit 1, the long side direction will be described as the X direction, the short side direction as the Y direction, and the height direction as the Z direction. The building unit 1 has a length of about 2 to 5.6 meters in the long side direction (X direction), for example, and a length of about 0.45 to 2 meters in the short side direction (Y direction). The length in the height direction (Z direction) is about 2.5 to 3 meters. That is, the building unit 1 has two elevation surfaces (XZ plane) along the long side direction, two elevation surfaces (YZ plane) along the short side direction, an upper surface, and a bottom surface (XY plane). It is comprised from these six surfaces.

  The incidental unit 10 connected and fixed to the building unit 1 has a small rectangular parallelepiped shape, and is provided on one side of the building unit 1 having a rectangular parallelepiped shape having six surfaces (YZ plane). It has the same rectangular side surface as the short side surface, and the length along the long side direction of the building unit 1 is set to be short. For example, while the length of the long side direction of the building unit 1 is about 4 to 5 meters, the length of the accessory unit 10 in the X direction is set to about 1 meter or a short length of 1 meter or less. ing.

  The accessory unit 10 has a small rectangular parallelepiped shape as shown in FIGS. 2 to 7, and four columnar members 11, 11... Made of channel steel or C-shaped steel whose cross-sectional shapes are substantially U-shaped. The two lower beams 12, 12 connecting the lower ends of these column members in the X direction, the two lower beams 13, 13 connecting in the Y direction, and the upper ends of the column members are connected in the X direction. It consists of two upper beams 14 and 14 and upper beams 15 and 15 connected in the Y direction. In the present embodiment, the side unit rectangle of the building unit 1 in the YZ direction and the side unit rectangle of the auxiliary unit 10 in the YZ direction have the same shape. With this configuration, when the incidental unit 10 is connected and fixed to the building unit 1, the building unit 1 is extended in the longitudinal direction (X direction) and has a shape in which no protruding portion or stepped portion is generated. The rectangular shape of the side surface in the YZ direction of the building unit 1 and the rectangular shape of the side surface in the YZ direction of the accessory unit 10 may not be the same shape, but may be a shape in which a stepped portion or a protruding portion is generated when connected.

  The four column members 11 constituting the incidental unit 10 are formed of groove-shaped steel or C-shaped steel material having a substantially U-shaped cross section. The structure is different from the formed pillar material, and the weight of the incidental unit 10 and the cost can be reduced. Since the accessory unit 10 is basically connected and fixed to one elevation surface of the adjacent building unit 1, the structure depends on the strength of the basic building unit 1, and the strength of the accessory unit 10 itself is Even if it is loose, there is no problem.

  That is, the incidental unit 10 is basically configured flexibly, easily follows the building unit 1 to be connected, and can flexibly absorb even when wind pressure or seismic force (external force) is applied. That is, when the incidental unit 10 is connected to the building unit 1, it is integrated with the building unit 1, and wind pressure and seismic force (external force) acting on the part are transmitted to the building unit 1 of the main body. It has a structure that does not compete. For this reason, in the incidental unit 10 of this embodiment, it becomes possible to transmit the wind pressure and seismic force (external force) which act on an incidental unit appropriately to a building unit, and a building unit and an incidental unit counteract external force integrally. can do.

  Of the members constituting the accessory unit 10, the lower beams 12, 12 and the upper beams 14, 14 along the X direction are rigidly joined to the column members 11, 11 by welding or the like, and the side surface of the accessory unit 10 in the XZ direction. 16 and 16 are rigid joint surfaces. Of the members constituting the accessory unit 10, the lower beams 13, 13 and the upper beams 15, 15 along the Y direction are pin joint surfaces connected to the column members 11, 11,. ing. In addition, you may reinforce by connecting a brace material in the inclined state to the rigid joint surfaces 16 and 16 of a XZ direction.

  In addition, although the two side surfaces of the incidental unit 10 showed the example of a rigid joint surface, the structure which is not a rigid joint surface may be sufficient. For example, the upper beams 14, 14 along the X direction are rigidly joined to the upper ends of the column members 11, 11 by welding or the like, and the lower beams 12, 12 are connected to the lower ends of the column members 11, 11 with bolts nuts or the like as fixtures. The side surfaces 16 and 16 may be configured. In other words, the upper beam 14 is joined to the upper ends of the column members 11 and 11 to form a gate shape, and the lower beam 12 is connected to the lower end of the gate shape with a fixture such as a bolt and nut to form the side surface 16. Good. Further, the upper beam 14 and the lower beam 12 may be connected to the upper and lower ends of the column members 11 and 11 with a fixture such as a bolt and nut to form the side surface 16 by pin joining. Details of these embodiments will be described later.

  For example, as shown in FIG. 3A, the incidental unit 10 is overlaid by being attached and fixed to the second floor building unit 1 on the upper floor of the first floor building unit 1A. It is connected and fixed to the state. In this case, you may comprise so that the auxiliary pillar H may be provided under the incidental unit 10. FIG. In FIG. 3B, the building unit 1 is installed and fixed above the foundation K, and the incidental unit 10 is connected and fixed to the building unit 1.

  Here, the detail of the incidental unit 10 is demonstrated based on FIGS. The lower beams 13 and 13 and the upper beams 15 and 15 constituting the auxiliary unit 10 are bolted to the column members 11 and 11 as described above. That is, the two reinforcing plates 20 and 20 are horizontally welded or the like so as to close the opening of the C-shaped steel at the lower end of the grooved steel or C-shaped steel having a substantially U-shaped cross section constituting the column member 11. The distance between the two reinforcing plates coincides with the height of the lower beam 13. In addition, two reinforcing plates 21 and 21 are welded horizontally by welding or the like so as to close the opening of the C-shaped steel in the same manner at the upper end of the column 11 made of C-shaped steel having a U-shaped cross section. In addition, the interval between the two reinforcing plates matches the height of the upper beam 15.

  And the joint plates 22, 22,... Are fixed vertically by welding or the like so as to connect the two reinforcing plates 20, 20, 21, 21, and the outer end face of the C-shaped steel. The joint plate is fixed so as to block a part of the opening of the channel steel or C-shaped steel, and the upper and lower wide portions and the central narrow portion are connected by inclined sides, and the lower beam 13 and the upper beam are connected to the wide portions. . Are inserted through the space formed on the back side of the joint plate by the narrow portion, and the bolts are used as fixtures inside the C-shaped steel of the column member 11. And a nut can be inserted.

  The reinforcing plates 20 and 21 and the joint plate 22 fixed to the upper and lower ends of the two column members 11 and 11 facing the building unit 1 are used to connect the lower beams 13 and 13 and the upper beams 15 and 15 along the Y direction. A connecting part is configured. End plates 13a and 15a that are in contact with the joint plate 22 are fixed to the lower beams 13 and 13 and the upper beams 15 and 15 so that bolts 23 can be inserted into the through holes 24, 24. Holes 13b and 15b are formed. As described above, the upper beams 15 and 15 and the lower beams 13 and 13 are joined by the bolts and nuts 23 via the joint plates 22.

  The accessory unit 10 is formed in a rectangular parallelepiped as described above, and includes auxiliary beams 17 and 17 in parallel with the upper beams 14 and 14 in the short side direction on a rectangular ceiling surface of the rectangular parallelepiped. Further, horizontal brace members 18 and 18 are connected between the upper beams 14 and 14 and the auxiliary beams 17 and 17. As described above, the auxiliary beams 17 and 17 are connected to the ceiling surface of the accessory unit 10 inside the upper beams 14 and 14 in the short side direction, and the auxiliary beams 17 and 17 and the upper beams 15 and 15 in the long side direction are connected. Is used as an opening S for attaching a skylight or the like. In addition, although you may comprise so that an opening part may be provided adjacent to one auxiliary beam 17, it is preferable to make the space between two auxiliary beams into an opening part.

  Here, the one auxiliary beam 17 and the horizontal brace material 18 will be described in detail with reference to FIGS. The auxiliary beam 17 is made of C-shaped steel, and joining plates 17a and 17a are fixed to both ends of the C-shaped steel opening downward by welding. On the other hand, in the incidental unit 10 that fixes the auxiliary beam 17, the joining members 15 c and 15 c are fixed to the upper beams 15 and 15 that fix the auxiliary beam 17 by welding or the like. The joining members 15c, 15c are made of C-shaped steel, set to a length that fits between the upper and lower ribs of the upper beam 15, and are fixed to each other by welding or the like. The auxiliary beam 17 is fixed by bolts and nuts 17b, 17b, with the joining plates 17a, 17a at both ends thereof and the joining members 15c, 15c of the upper beam 15 in contact with each other. Since the auxiliary beams 17 and 17 are fixed with bolts and nuts between the upper beams 15 and 15 via the joining members 15c and 15c, when a force is applied to the auxiliary beam, the load is shared by the upper and lower flanges of the upper beam. It can be received and the strength can be increased. Further, when the joining member 15c is fixed to the upper beam, a space is formed on the back side, and a bolt or a nut can be mounted on the back side of the joining member, so that the auxiliary beam can be easily installed. .

  The horizontal brace member 18 is formed of a round bar member, and is connected to a space between the auxiliary beam 17, the upper beam 14, and the upper beams 15 and 15. Joining plates 11a and 11a bent in the middle to connect the brace material are fixed to the column members 11 and 11 constituting the accessory unit 10 by welding or the like. A triangular reinforcing plate 11b for preventing deformation by the joining plate 11a is fixed inside the column member 11 by welding or the like. On the other hand, connection holes 17c and 17c are formed through both ends of the upper surface of the auxiliary beam 17 so as to penetrate therethrough. The horizontal brace member 18 is connected with a turnbuckle 18a whose length can be adjusted in the middle of a round bar member, and connecting plates 18b and 18b are fixed to both ends by welding or the like.

  The horizontal brace member 18 has one end plate 18b overlapped with the joining plate 11a of the column member 11 and fixed with bolt nuts 18c, 18c, and the other plate 18b overlapped with the upper surface of the auxiliary beam 17 on the diagonal side. The connection hole 17c is fixed with a nut through a bolt, and the length can be adjusted with the turnbuckle 18a in the middle, so that the tension can be applied. Further, another horizontal brace material 18 is mounted diagonally so as to intersect with the mounted horizontal brace material 18. The structural strength of the ceiling surface of the incidental unit 10 can be increased by connecting the two horizontal brace members 18, 18 so as to intersect in the horizontal direction.

  In this way, in the rectangular shape of the ceiling surface of the accessory unit 10, after the horizontal brace members 18 and 18 are mounted in a cross state at one end portion, the auxiliary beam 17 is similarly connected to the other end portion of the rectangular shape. Then, the horizontal brace members 18 and 18 are mounted in a cross state. And if necessary, the structural strength of the ceiling surface can be increased by attaching the auxiliary beams 17 and 17 and the horizontal brace members 18 and 18 to the rectangular central portion of the ceiling surface. An opening can be formed between 17. That is, the auxiliary beam 17 and the horizontal brace material 18 can be freely set according to the required opening area and number.

  In the column members 2 and 2 of the building unit 1, two attachment holes 30 are provided in each of the upper and lower ends facing the incidental unit 10 of the column members 2 and 2 as a configuration for connecting the incidental unit 10 to the building unit 1. , 30 are formed, and nuts 32, 32 to which bolts 31, 31 for connecting and fixing the accessory unit 10 to the building unit 1 are screwed are fixed by welding or the like. A guide pin 33 is fixed via a nut or the like in the middle of the mounting hole in which the two nuts are welded. The guide pin 33 is for positioning so as to facilitate bolting when the accessory unit 10 is connected and fixed to the building unit 1, and the tip of the guide pin 33 is tapered.

  In the incidental unit 10, three through holes 27 are formed on the surfaces of the pillar members 11, 11 facing the building unit 1 corresponding to the mounting holes 30 of the building unit 1 and the guide pins 33. Bolts 31 are inserted into the upper and lower two through holes, and a guide pin 33 is inserted into the central through hole. A spacer 35 is interposed between the pillar material 2 of the building unit 1 and the pillar material 11 of the incidental unit 10. The spacer 35 is formed with a through hole into which the bolts 31 and 31 and the guide pin 33 can be inserted.

  In the incidental unit 10 formed in this way, the column member is a rectangular column and the beam unit is a grooved steel or C-shaped steel, and two surfaces ( (X-Z plane) is rigidly joined, and the rigid joint surfaces 16 and 16 are connected by four beam members 13, 13, 15 and 15 by bolts and nuts 23. It is possible to reduce the weight of the column material and the beam material, and to reduce the cost.

  Further, the incidental unit 10 is transported by being divided into two rigid joint surfaces 16 and 16 and four beam members 13, 13, 15, and 15, which are composed of the column members 11 and 11, the lower beam 12 and the upper beam 14. It is also possible to fix and assemble the beam material locally. In the illustrated embodiment, as the two rigidly joined surfaces of the rectangular parallelepiped constituting the accessory unit 10, two surfaces in the XZ direction are used, but two surfaces in the YZ direction are used as the rigidly joined surfaces. Of course, it is good. The accessory unit 10 may be formed by bolting four column members, four lower beams, and four upper beams, and is formed by combining rigid bonding by welding and pin bonding by bolts and nuts. May be.

  Through holes are formed in the upper and lower end surfaces of the column members 2, 2... Constituting the building unit 1, and nuts are fixed to the inner surfaces of the through holes by welding or the like. The upper through holes of the four pillars of the building unit 1 are fitted with eyebolts (not shown) for lifting the building unit 1 when transporting the building unit 1 or installing it on the foundation. When stacking 1 and 1 up and down, bolts that are connected vertically are screwed in. Further, through holes 21a are similarly formed in the reinforcing plates 20, 21 fixed to the upper and lower end surfaces of the column members 11, 11,... Constituting the auxiliary unit 10, and nuts 19 (see FIG. 5) are formed on the inner surfaces of the through holes. ) Is fixed by welding or the like. As shown in FIG. 4, a balcony pillar B constructed on the incidental unit 10 can be connected and fixed to the upper end of the pillar 11 using the nut 19.

  The assembly of the accessory unit 10 of the present embodiment configured as described above will be described below. As described above, the accessory unit 10 is transported by being divided into the side surfaces 16 and 16 which are two rigid joint surfaces and the four beam members (the lower beams 13 and 13 and the upper beams 15 and 15) and assembled on site. It is done. It is also possible to assemble at the factory and transport the building unit together. In this assembly, the through holes 24, 24... Of the joint plates 22, 22... Fixed to the upper and lower ends of the column members 11, 11 constituting the side surfaces, and the end plates 13a, 15a of the lower beam 13 and the upper beam 15 are formed. The bolts 23 are inserted by aligning the through holes 13b and 15b, and a nut is screwed and fixed. Bolts and nuts can be inserted into the column member 11 by the narrow portion of the joint plate 22. Thereby, the side surfaces 16 and 16 are couple | bonded by four beam materials, and the rectangular parallelepiped incidental unit 10 is completed.

  The accessory unit 10 configured as described above is small and divided into two face members (side surfaces that are rigidly joined) 16 and 16 and four beam members (lower beams 13 and 13 and upper beams 15 and 15). Therefore, it can be easily transported. Moreover, since the incidental unit 10 does not require strength, the column member 11 and the beam members 12, 13, 14, and 15 can be small and light, can reduce the weight of the incidental unit 10, and can achieve cost reduction. The building shape can be designed according to the site shape. Furthermore, the side surfaces 16 and 16 can be made into rigid joint surfaces by welding, and the rigid joint surfaces can be connected by four beam members to form a rectangular parallelepiped accessory unit, which eliminates the need for large-scale manufacturing equipment such as a building unit. Thus, it can be easily manufactured.

  In the incidental unit 10 of the present embodiment, the joining members 15c and 15c are fixed to the upper beams 15 and 15 constituting the ceiling surface, and the auxiliary beams 17 and 17 are connected between the joining members, and are the auxiliary beam 17 and the structural member. Horizontal brace members 18 and 18 are fixed between the column members 11. Thus, since the auxiliary beam is fixed to the ceiling surface of the incidental unit 10 in parallel with the upper beam in the short side direction and reinforced with the horizontal brace material, the structural strength of the ceiling surface is increased. For this reason, an opening such as a skylight can be freely formed between the auxiliary beams 17 and 17. A skylight can be formed by placing a translucent resin or a glass plate on the upper part of the opening S formed in this way and spreading the periphery with a roofing material.

  Another embodiment of the incidental structure according to the present invention will be described in detail with reference to FIG. FIG. 8 is a perspective view of another embodiment of the incidental structure according to the present invention, showing a state where it is connected to the long side of the building unit. In addition, this embodiment is connected with the side surface of the long side of a building unit, while embodiment of an incidental unit mentioned above is connected with the side surface of the short side of a building unit, It is characterized by the above-mentioned. Other substantially equivalent configurations are denoted by the same reference numerals, and detailed description thereof is omitted.

  In FIG. 8, the accessory unit 10 </ b> A connects four column members 11, 11... Made of channel steel or C-shaped steel having a substantially U-shaped cross section and the lower ends of these column members in the Y direction. Two short lower beams 12, 12; two long lower beams 13, 13 connected in the X direction; two short upper beams 14, 14 connecting the upper ends of the column members in the Y direction; It consists of two long upper beams 15 and 15 connected in the direction, and has a rectangular parallelepiped shape. Further, in the incidental unit 10A, the rectangle on the side surface in the XZ direction of the building unit 1 and the rectangle on the side surface in the XZ direction of the incidental unit 10A have the same shape. For this reason, when the accessory unit 10A is connected and fixed to the building unit 1, the indoor space can be expanded in the Y direction.

  Similarly to the above-described embodiment, the incidental unit 10A has the same structure in which the column members 11 and 11, the lower beams 12, 12, 13, and 13 and the upper beams 14, 14, 15, and 15 are joined. It is joined by combining the rigid joint by, and the pin joint by a fastener such as a bolt and nut. Of course, all the joints may be pin-jointed by bolts and nuts.

  In this embodiment, auxiliary beams 17 and 17 are connected to the ceiling surface of the accessory unit 10A at both ends of the rectangle with a space parallel to the upper beams 14 and 14 in the short side direction and at the center of the rectangle. Auxiliary beams 17A and 17A are connected in parallel to the upper beams 14 and 14, respectively. And between the upper beams 14 and 14 and the auxiliary beams 17 and 17, horizontal brace materials 18 and 18 are connected in a cross shape. Also, horizontal brace members 18 and 18 are connected to the auxiliary beams 17A and 17A at the center. Thus, in the incidental unit 10A, the four auxiliary beams 17, 17, 17A, 17A are connected in parallel to the two upper beams in the short side direction constituting the ceiling surface, and the two openings S, S are connected. Is formed.

  In the incidental unit 10A configured as described above, the weight can be reduced with a simple configuration compared to the building unit, and the internal space of the building unit can be reduced by being connected and fixed to the building unit constituting the unit building. Can be expanded with a small weight increase and a slight increase in cost. Moreover, an opening such as a skylight can be freely formed on the ceiling surface of the incidental unit 10A without reducing the structural strength, and when configured as a unit building, the customer needs by forming the opening freely. Can be easily accommodated.

  Next, the operation of connecting and fixing the accessory units 10 and 10A of the present embodiment to the building unit 1 will be described below. The attachment surfaces of the accessory units 10 and 10A assembled as described above are opposed to the attachment surface of the building unit 1, and the spacer 35 is sandwiched between the pillar material 2 and the pillar material 11, and both units are brought into close contact with each other. By inserting guide pins 33, 33 protruding from the upper and lower ends of the column members 2, 2 of the building unit 1 into the through holes 27, the mounting holes 30, 30 of the column members 11, 11 of the building unit 1, and the incidental unit 10 The through holes 27, 27 are in close contact so that they communicate with each other. Then, a bolt 31 is inserted from the through hole 27 side of the column member 11, and is screwed into a nut 32 fixed inside the column member 2 and tightened. The bolt 31 can be easily inserted through the space beside the joint plate 22. In addition, you may make it position and connect using tools, such as Shino, without using a guide pin.

  Thus, when the incidental units 10 and 10A are connected and fixed to the building unit 1, the internal space of the building unit 1 is expanded by the amount of the incidental units 10 and 10A, and the internal space can be used effectively. For example, as shown in FIG. 9A, when the accessory unit 10 is connected and extended in the long side direction (X direction) of the building unit 1, or the accessory unit 10A is connected in the short side direction (Y direction). May be extended. The incidental unit 10A is basically the same configuration as the incidental unit 10 except that the length of the four beam members connecting the two side surfaces 16a and 16a (YZ plane) is long.

  In the unit building H1 in which the accessory units 10 and 10A are connected and fixed to the building unit 1, the opening S can be formed on the ceiling surface of the accessory unit 10, and the two openings S and S are formed on the ceiling surface of the accessory unit 10A. Can be formed. For this reason, external light can be taken into the room from the incidental unit portion. Although not shown in detail in FIG. 9, the opening S is a space surrounded by the upper beams 15 and 15 and the auxiliary beams 17 and 17.

  As described above, the unit 10 or 10A is connected and fixed to the building unit 1, or a plurality of the building units 1 are juxtaposed, and the unit building is formed by stacking up and down, and the unit 10 or 10A is connected and fixed. When the roof structure is formed on the upper part of the building, an opening such as a skylight can be freely formed on the upper part of the auxiliary units 10 and 10A so as to fit between the auxiliary beams 17 and 17. It can prevent that the structural yield strength of the ceiling surface of the unit 10 falls. In addition, although it is desirable that the base part (not shown) which mounts the building unit 1 with respect to the incidental unit connected with the 1st floor is also formed in an incidental unit part, an overhanging state without a foundation may be sufficient. .

  In FIG. 9 (b), two building units 1 are stacked in two layers, and four unit units are combined to form a unit building, and the incidental unit 10 is connected and fixed to the unit on the left of the first floor of the unit building. H2 is configured. In this example, the incidental unit part protrudes from the shape of the rectangular parallelepiped of the unit building H2 to change the appearance, and this incidental part can be used as, for example, an entrance part. Moreover, it is not restricted to a front door part, For example, the interior space of a living room can be expanded and it can utilize as a storage space. And the opening part S can be formed in the ceiling surface of the incidental unit 10, and external light can be taken in.

  In FIG. 9C, similarly, four building units 1 are combined, and the incidental unit 10 is connected and fixed to the building unit on the right of the second floor to constitute a unit building H3. In this example as well, the appearance of the unit building H3 can be changed, and the incidental unit 10 can be protruded from the building unit 1 on the second floor in an overhanged state so that the internal space can be expanded and effectively used. External light can be taken into the portion from the opening S. The incidental unit 10 shown in this example is mounted on the second floor portion, and the incidental unit is preferably a side whose surface is a rigid joint surface and reinforced with a brace material.

  In FIG. 9 (d), four building units 1 are combined, and two auxiliary units 10 are stacked and fixed on the left and right building units on the 1st and 2nd floors to form a unit building H4. Also in this example, the appearance of the unit building H4 can be changed, and the internal space of the building units 1 and 1 on the first and second floors can be expanded and used effectively. In particular, the staircase that penetrates the upper and lower floors Can be used as The incidental unit 10 shown in this example can be provided with an opening S on the ceiling surface of the incidental unit 10 on the upper floor, and can take in external light. In addition, by making the incidental units on the upper and lower floors atrium, outside light can be taken into the incidental units on the lower floor.

  In FIG. 9 (e), four building units 1 are combined, and the accompanying unit 10A for the long side direction connected along the long side direction (X direction) of the building unit 1 is connected and fixed to the first floor building unit 1. The unit building H5 is configured. Also in this example, the appearance of the unit building H5 can be changed, and the internal space of the building unit 1 on the first floor can be expanded and effectively used. The accessory unit 10A shown in this example is mounted on the first floor, and the accessory unit 10A can form two openings S, S on the ceiling surface, and provide a skylight or the like in this opening. Can do.

  In FIG. 9 (f), four building units 1 are combined, and the accompanying unit 10 </ b> A for the long side direction connected along the long side direction (X direction) of the building unit 1 is connected and fixed to the second floor building unit 1. The unit building H6 is configured. Also in this example, the appearance of the unit building H6 can be changed, the internal space of the building unit 1 on the second floor can be expanded and used effectively, and the ceiling surface of the incidental unit 10A connected and fixed to the second floor External light can be taken from the two openings S and S formed in the above.

  In FIG. 10A, four building units 1 are combined, and the accompanying unit 10A for the long side direction connected along the long side direction (X direction) of the building unit 1 is the first floor and the second floor building unit 1, The unit building H7 is connected and fixed to 1. In this example, the internal space of the building units on the first and second floors can be greatly expanded. Further, this extended portion can be used as a blow-through. The upper floor accessory unit 10A includes two openings S, S along the long side direction, so that a skylight or the like can be provided in accordance with the openings, and external light can be taken in. . By providing an opening in the accessory unit on the lower floor, external light can be taken into the accessory unit on the first and second floors.

  In FIG. 10 (b), four building units 1 are combined, and the accompanying unit 10 </ b> A for the long side direction connected along the long side direction (X direction) of the building unit 1 is connected and fixed to the first floor building unit 1. The unit building H8 is configured by installing a balcony BL on the upper part of the incidental unit 10A. In this example, as shown in FIG. 4, a fixing tool such as a bolt is passed through a through hole 21a formed in the upper end surface of the column member 11 of the accessory unit 10A, and screwed into an internal nut 28 to fix the balcony column B. be able to. In the unit building H8, the openings S and S of the incidental unit on the lower floor may be blocked with a roofing material to block outside light, or may be configured to take in outside light transmitted through the balcony floor.

  In FIG. 10 (c), four building units 1 are combined up and down, one building unit 1 is arranged on the first floor portion in the X direction, five building units are combined, and four building units are combined. The unit building H9 is configured by connecting and fixing the incidental unit 10 connected along the short side direction (Y direction) to the corner of the first floor of one building unit. In this example as well, the incidental unit 10 can be effectively used for an entrance space and the like, and external light can be taken from the opening S formed on the ceiling surface of the incidental unit 10 connected and fixed to the first floor.

  In FIG. 10 (d), four building units 1 are combined, and along the long side direction (X direction) of the building unit 1 on the first floor, the accessory unit 10 for the short side is connected and fixed, and the unit building H10 is assembled. It is composed. In this example, a part of the internal space of the building unit 1 on the first floor can be enlarged, and external light can be taken from the opening S formed on the ceiling surface of the incidental unit 10 connected and fixed to the first floor. In addition, the appearance of the unit building H can be changed. In this example, it is preferable to install an intermediate column in the middle part of the long side direction of the building unit 1 connecting the incidental unit 10 in accordance with the column material of the incidental unit.

  In FIG. 10 (e), four building units 1 are combined, and along the short side direction (Y direction) of the building unit 1 on the first floor, the auxiliary units are connected to the two building units 1 and 1 on the first floor. Unit building H11 is configured by connecting and fixing 10B. This incidental unit 10B has the same configuration as the aforementioned incidental units 10 and 10A, and is configured by connecting two side surfaces with four beam members. In this example, the internal space can be expanded continuously to the two building units 1 and 1 on the first floor, and the appearance of the unit building H can be changed. Moreover, external light can be taken in from two opening part S, S formed in the ceiling surface of the incidental unit 10B connected and fixed to the 1st floor.

  As another aspect of the present invention, the incidental unit 10C shown in FIG. 11 includes four column members 11 and four lower beams 12 that connect the lower ends of the column members in the horizontal direction, as in the above embodiment. , 13 and four upper beams 14, 15 that connect the upper end of the column member 11 in the horizontal direction. The accessory unit 10C further includes an auxiliary beam 17B along the upper beam in the short side direction on the rectangular parallelepiped ceiling surface, and the auxiliary beam is rigidly connected to the upper beams 15 and 15 in the long side direction. . Specifically, in the illustrated example, the high strength bolts 17c and 17c are connected and fixed to the joining members 15c and 15c fixed to the upper beams 15 and 15 in the long side direction. Since this auxiliary beam 17B is also fixed by bolts and nuts between the upper beams 15 and 15 via the joining members 15c and 15c, when a force is applied to the auxiliary beam, the load is shared by the upper and lower flanges of the upper beam. Can increase the strength. Further, when the joining member 15c is fixed to the upper beam, a space is formed on the back side, and a bolt or a nut can be mounted on the back side of the joining member, so that the auxiliary beam can be easily installed. .

  In the incidental unit 10C shown in this embodiment, since the auxiliary beam 17B is rigidly connected to the upper beams 15 and 15 as structural members, the auxiliary unit 17C can be used even without a horizontal brace material as in the previous embodiment. The structural force of the ceiling surface can be increased, and even when an opening such as a skylight is formed between the auxiliary beams 17B and 17B, when external pressure or seismic force is applied to the incidental unit, these external forces are appropriately applied to the building. Can be transmitted to the unit. Although not shown, the structural force of the ceiling surface can be increased without a horizontal brace material by connecting and fixing both ends of the auxiliary beam to the upper beam by welding as rigid joints.

  The incidental unit 10C of this embodiment can also be connected and fixed to a building unit to form a unit building. The unit building as shown in FIGS. In addition, by forming an opening such as a skylight on the upper surface of the connected accessory unit, external light can be taken into the unit building.

  Still another aspect of the incidental structure of the present invention will be described with reference to FIGS. The incidental unit 10 </ b> D shown in FIG. 12 includes four column members 11, four lower beams 12 and 13 that connect the lower ends of the column members 11 in the horizontal direction, and the column member 11, as in the above embodiment. It is comprised in the shape of a rectangular parallelepiped from the four upper beams 14 and 15 which connect the upper end part of a horizontal direction. And the incidental unit 10D is incidentally connected to the vertical surface of the building unit 1 and is connected and fixed to the pillars 11 and 11 constituting the vertical surface of the building unit 1, and the internal space of the building unit 1 is expanded. It has a function to make it.

  A characteristic point of the incidental unit 10D is a side surface that is two opposing elevational surfaces constituting a rectangular parallelepiped. That is, the side beams 16b and 16b have the upper beams 14 and 14 rigidly joined to the upper ends of the two column members 11 and 11 by welding or the like, and the lower beams 12 and 12 are fixed to the column members 11 and 11 by a fixture such as a bolt nut. It is the point connected and fixed to the lower end part of. Specifically, for example, end plates are fixed to both ends of the beam member by welding or the like, and bolts are fixed to the holes penetrating the end plate and the column member with nuts. The lower beams 13 and 13 in the long side direction are connected to the lower end portions of the side surfaces 16b and 16b in which the upper beam 14 and the lower beam 12 are connected and fixed to the column members 11 and 11, and the long side direction is similarly connected to the upper end portion. The upper beams 15 and 15 are connected, the floor joists are connected between the lower beams 13 and 13 as necessary, and the auxiliary beams 17 and 17 are connected between the upper beams 15 and 15 via a joining member. Although not shown, the brace material is fixed to complete the incidental unit 10D.

  Since the incidental unit 10D having the side surfaces 16b and 16b configured as described above is configured more flexibly than the side surface in which the upper beam and the lower beam are rigidly connected to the upper and lower ends of the column member, the building unit 1 It is possible to appropriately transmit wind pressure and seismic force (external force) acting on the incidental unit 10D to the building unit when connected to and fixed to the building unit 1, and the building unit 1 and the incidental unit 10D must counteract external force as a unit. Can do. In the incidental unit 10D, the ceiling surface is reinforced by the auxiliary beam 17 and the brace material 18, and an opening such as a skylight can be formed on the ceiling surface without reducing the structural strength. In the incidental unit 10D, the upper beam is rigidly joined and the lower beam is joined by a fixture such as a bolt and nut. However, the lower beam is rigidly joined by welding or the like, and the upper beam is joined by a fixture such as a bolt and nut. It is good.

  The incidental unit 10E shown in FIG. 13 also connects four column members 11, four lower beams 12 and 13 that connect the lower ends of the column members 11 in the horizontal direction, and the upper ends of the column members 11 in the horizontal direction. The four upper beams 14 and 15 are formed in a rectangular parallelepiped shape, and the incidental unit 10E is connected to the elevation of the building unit 1 and connected to the pillars 11 and 11 constituting the elevation of the building unit 1. It is fixed and expands the internal space of the building unit 1.

  A characteristic point of the accessory unit 10E is a side surface which is two opposing vertical surfaces constituting a rectangular parallelepiped, and the side beams 16c and 16c have upper beams 14 and 14 at the upper ends of the two column members 11 and 11, respectively. The lower beams 12 and 12 are also connected and fixed to the lower ends of the column members 11 and 11 by a fixture such as a bolt and nut. The lower beams 13 and 13 are connected to the lower ends of the side surfaces 16c and 16c in which the upper beam 14 and the lower beam 12 are connected and fixed to the pillars 11 and 11, and similarly, the lower beams 13 and 13 are connected to the upper end in the long side direction. The upper beams 15 and 15 are connected, the floor joists are connected between the lower beams 13 and 13 as necessary, and the auxiliary beams 17 and 17 are connected between the upper beams 15 and 15 via a joining member. Although not shown, the brace material is fixed to complete the incidental unit 10E.

  The incidental unit 10E having the side surfaces 16c and 16c configured in this manner has a side surface in which the upper beam and the lower beam are rigidly joined to the upper and lower ends of the column member, and one of the upper beam and the lower beam is rigidly joined. Is more flexible than the side joined with bolts and nuts, etc., so that when it is connected and fixed to the building unit 1, wind pressure and seismic force (external force) acting on the incidental unit 10E are applied to the building unit. It becomes possible to transmit appropriately and the building unit 1 and the incidental unit 10E can counter external force integrally. In the incidental unit 10E, the ceiling surface is reinforced by the auxiliary beam 17 and the brace member 18, and an opening such as a skylight can be formed on the ceiling surface without reducing the structural strength.

  The incidental structure according to the present invention can be configured as a modified structure shown in FIG. 14 as a connection structure between a column member and a beam member. In this modification, a connection structure that avoids a state close to a fixed joint is employed, and a plate 12a is welded to the end of the beam material (lower beam 12), and a connection plate 12b is connected to the center of the plate 12a. Are further welded to reduce the interval between the through holes through which the bolts and nuts are inserted. By comprising in this way, the plate 12a is easy to deform | transform and the softness | flexibility of the connection part of a pillar and a beam can be improved.

  FIG. 15 shows still another embodiment of the incidental unit. In each of the embodiments described above, the incidental unit has four pillars with four lower beams and four upper beams formed as pillar winning specifications. In this embodiment, the beam winning specifications are used. Is formed. In the incidental unit 10F of FIG. 15, the four upper beams 14a, 14a, 15a, 15a are connected to each other with a fixture such as a bolt and nut inserted into the through hole to form a rectangular shape. Below the four beam members, four column members 11A are connected by a fixture such as a bolt and nut. Similarly, the connection between the lower part of the column 11A and the four lower beams is not shown, but the four lower beams are connected to each other in a rectangular shape by a fixing device such as a bolt and nut, and formed into a rectangular shape. The lower end of the four column members is connected to the upper part of the lower beam.

  In the incidental unit 10F configured to win the beam, although not shown, for example, the auxiliary beam is fixed between the upper beams 15a and 15a via a joining member, and the brace material is used as necessary. Since the ceiling surface is reinforced, a skylight or the like can be provided without reducing structural strength. As described above, the incidental structure according to the present invention can be applied with an appropriate structure such as a column winning structure, a beam winning structure, or a combination of pillar winning and beam winning.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, although the example which used four or five building units as a unit building was shown, the thing using two or three building units may be used, and many building units can be used.

  Of course, a plurality of incidental units may be connected and fixed to a unit building on the third floor or higher. Furthermore, although the example of channel steel or C-shaped steel has been described as the column material constituting the accessory unit, steel materials of other shapes such as H-shaped steel may be used. As an example of a horizontal brace material, a cross-shaped example is provided between an auxiliary beam and a structural member. However, a horizontal brace material inclined on one side is installed between one auxiliary beam and a structural member, and the other auxiliary beam is provided. You may comprise so that the horizontal brace material inclined on the other may be mounted | worn between a beam and a structural member.

  As an example of use of the present invention, the appearance of a unit building constructed by assembling a building unit using this incidental unit can be changed to a heavy design, and by connecting and fixing the incidental unit, the unit building The internal space can be enlarged, and an opening such as a skylight can be provided on the ceiling surface of the incidental structure.

  1: Building unit, 2: Column material, 3, 4: Lower beam, 5, 6: Upper beam, 10, 10A, 10B, 10C, 10D, 10E, 10F: Attached unit (attached structure), 11, 11A: Column material, 12, 13: Lower beam, 13a, 15a: End plate (joint member), 14, 15: Upper beam, 16, 16a: Side surface (rigid joint surface), 16b, 16c: Side surface, 17, 17A, 17B : Auxiliary beam, 18: horizontal brace material, 20, 21: reinforcing plate, 22: joint plate (joint member), 23: bolt nut, 24: through hole, 30: mounting hole, 31: bolt (fixing tool), 32 : Nut, 33: Guide pin, H1 to H11: Unit building, S: Opening

Claims (9)

A small incidental structure that is connected to an elevation of a rectangular parallelepiped building unit constituting the unit building and expands the internal space of the building unit,
The incidental structure includes four column members, four lower beams that connect the lower ends of the column members in the horizontal direction, and four upper beams that connect the upper ends of the column members in the horizontal direction. Is formed in a rectangular parallelepiped shape, and is connected and fixed to a member constituting the elevation surface of the building unit,
The incidental structure further includes an auxiliary beam on the ceiling surface of the rectangular parallelepiped along the upper beam in the short side direction, and a horizontal brace material between the auxiliary beam and the structural member. object.   The auxiliary structure according to claim 1, wherein a plurality of the auxiliary beams are provided in parallel to the two upper beams in the short side direction constituting the ceiling surface. A small incidental structure that is connected to an elevation of a rectangular parallelepiped building unit constituting the unit building and expands the internal space of the building unit,
The incidental structure includes four column members, four lower beams that connect the lower ends of the column members in the horizontal direction, and four upper beams that connect the upper ends of the column members in the horizontal direction. Is formed in a rectangular parallelepiped shape, and is connected and fixed to a member constituting the elevation surface of the building unit,
The auxiliary structure further includes an auxiliary beam on the ceiling surface of the rectangular parallelepiped along the upper beam in the short side direction, and the auxiliary beam is rigidly connected to the upper beam in the long side direction. Structure.   In the incidental structure, the two facing surfaces of the rectangular parallelepiped are rigid joint surfaces in which the two column members and the upper beam and the lower beam are rigidly joined, and the other two facing surfaces facing each other are the two columns. The auxiliary structure according to any one of claims 1 to 3, wherein the material, the upper beam, and the lower beam are connected and formed via a joint member by a fixture such as a bolt and nut.   The four column members are made of channel steel or C-shaped steel having a substantially U-shaped cross section, and the joint member is fixed so as to close a part of the opening of the channel steel or C-shaped steel, The accessory structure according to claim 4, wherein a fastening space for a fixture such as a bolt and nut is formed on the back side of the joint member.   In the incidental structure, one of the upper beam and the lower beam is rigidly joined to the two column members, and the other is connected to the two column members by the fixtures, in the two vertical surfaces facing each other. The incidental structure according to any one of claims 1 to 3.   4. The auxiliary structure according to claim 1, wherein the four lower beams and the four upper beams are connected to the four column members by a fixture such as a bolt and nut. 5. Ancillary structures described in 1.   The incidental structure according to any one of claims 1 to 7, wherein the incidental structure is connected and fixed to two pillar members of the building unit via a guide member.   A unit building, wherein the incidental structure according to any one of claims 1 to 8 is connected and fixed to the building unit.

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