Balcony mounting structure

Abstract

To provide a balcony mounting structure capable of making attachment for mounting a balcony on a building unit unnecessary.SOLUTION: The present invention relates to a balcony mounting structure for mounting a balcony 3 on a building unit 2. A joint bolt 22 is projected perpendicularly to the outer side on a side surface 21 that faces the outside of a pillar 7 configuring the building unit 2. An end plate 27 that is brought into surface contact with the side surface 21 of the pillar 7 and has a through hole 26 through which a joint bolt 22 penetrates is attached to an end 25 closer to the pillar 7 of a gable beam 24 that configures a floor frame 23 of the balcony 3 and extends in a direction perpendicular to the side surface 21 of the pillar 7. The gable beam 24 has an opening 29 exposing the through hole 26 to the outside on an external side face 28.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a balcony mounting structure. [Background technology]

[0002] For example, in buildings such as modular buildings, balconies are attached to the exterior surfaces of the building units that make up the main body of the building. In this case, an attachment is attached to the building unit, and the balcony is indirectly attached to the building unit via this attachment (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-214446 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the balcony mounting structure described in Patent Document 1 requires the use of a special part called an attachment to mount the balcony. Therefore, using an attachment increases the number of parts used. Furthermore, because the attachment must be attached to the building unit and the balcony must then be mounted to this attachment, the number of construction steps increases, which is time-consuming and increases costs.

[0005] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0006] In response to the above problems, the present invention provides: A balcony mounting structure for mounting a balcony to a building unit, A joint bolt is provided on the exterior side of the pillar that constitutes the building unit, protruding outward perpendicular to the surface, The balcony floor frame is configured, and the end of the gable beam extending in a direction perpendicular to the side surface of the column is attached to the column side. an end plate is attached which is in surface contact with the side surface of the column and has a through hole through which the joint bolt passes; The gable beam is The end of the pillar The through hole on the outer surface The tip of the joint bolt protruding into the inside of the gable beam through Has an open area exposed to the outside death, The floor frame of the balcony has the gable beam and an eaves beam extending along the building unit, The eaves beam is separated from the gable beam, and the end face is abutted against the inner surface of the end of the gable beam on the column side via a spacer, and is joined in the extension direction of the eaves beam by an adjustment bolt, The adjustment bolt has a body portion whose tip protrudes into the end beam and is exposed to the outside from the opening formed on the outer surface of the end beam on the column side, The open section is a section where a nut is screwed onto the tip of the joint bolt from the outside of the floor frame of the balcony to directly fasten and fix the balcony to the building unit, and where another nut screwed onto the tip of the body of the adjustment bolt is operated from the outside of the floor frame of the balcony to adjust the width of the floor frame. It is characterized by: [Effects of the Invention]

[0007] According to the present invention, the above-mentioned configuration makes it possible to eliminate attachments for mounting the balcony to the building unit. Furthermore, even if the building unit and balcony are manufactured in different manufacturing factories, the width of the balcony can be adjusted at the construction site using adjustment bolts and spacers, allowing it to be attached to the building unit with high precision. Furthermore, the openings on the outer surface of the end of the gable beam on the column side allow the balcony floor frame to be attached using joint bolts and the width of the floor frame to be adjusted using adjustment bolts and spacers from outside the floor frame, ensuring safety during the work. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the state of the balcony mounting structure according to this embodiment before the balcony is mounted. [Figure 2] 2(a) and 2(b) are perspective views sequentially showing how one end beam of a balcony is attached to a pillar of a building unit located in part A of FIG. 1. [Figure 3] 2(a) and 2(b) are perspective views sequentially showing how the other end beam of the balcony is attached to the pillar of the building unit located in part B of FIG. 1. [Figure 4] 2 is a partially enlarged vertical cross-sectional view of part C (the periphery of the central part of the balcony) in FIG. 1, showing the state in which the balcony is temporarily placed on the building unit. FIG. [Figure 5]10(a) and 10(b) are perspective views sequentially showing how one end of an eaves beam is attached to one of the gable beams. [Figure 6] 10(a) and 10(b) are perspective views sequentially showing how the other end of the eaves beam is attached to the other gable beam. [Figure 7] (a) and (b) are diagrams showing in order how to adjust the width between the other gable beam and the eaves beam using spacers. Note that (a) is a perspective view of the gable beam from the outside surface, and (b) is a side view. [Figure 8] 7, which is a side view showing how the width between the other gable beam and the eaves beam is adjusted using a spacer. Of these, (a) shows the case where the spacer is removed, and (b) shows the case where the spacer is added. [Figure 9] FIG. 10 is a perspective view showing the state of a balcony mounting structure according to a comparative example before the balcony is mounted. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, this embodiment will be described in detail with reference to the drawings. 1 to 9 are used to explain this embodiment. [Example]

[0010] <Configuration> The configuration of this embodiment will now be described.

[0011] Buildings such as houses include, for example, a unit building 1 as shown in Figure 1. The unit building 1 is a building that can be constructed in a short period of time by transporting building units 2 that have been manufactured in advance in a factory to a construction site and assembling them there.

[0012] A balcony 3 is attached to the outdoor portion of such a building unit 2. The attachment structure of this balcony 3 (balcony attachment structure) is as follows.

[0013] Here, the building unit 2 is a unit structure of the unit building 1, which is roughly rectangular. The building units 2 are installed horizontally (long side direction 4 and short side direction 5) and vertically 6. The lower floor of the building is formed by installing the building units 2 side by side, and the upper floor of the building is formed by stacking the building units 2 on top of the building units 2 on the lower floor.

[0014] The building unit 2 has a box-shaped unit frame inside that serves as the skeleton. The unit frame is made up of four pillars 7 whose upper ends are connected in a rectangular shape by four horizontal ceiling beams 8 (Figure 4), and four pillars 7 whose upper ends are also connected in a rectangular shape by four horizontal floor beams 9. The building unit 2 is manufactured in a manufacturing factory dedicated to building units 2. Note that Figure 1 only shows the pillars 7 and floor beams 9 that are installed at the surface of the building unit 2 where the balcony 3 is to be attached.

[0015] The outdoor portion refers to the surface (side) facing outward of the unit building 1. An exterior wall material 11 is installed on the outdoor surface of the building unit 2. The balcony 3 is attached to one of the surfaces of the building unit 2 on which the exterior wall material 11 is installed. An opening such as a window is formed in the exterior wall material 11 to allow access to the balcony 3.

[0016] The balcony 3 is an accessory to a building (unit building 1) that allows access from indoors to outdoors. The balcony 3 can include various types such as a veranda or a porch. The balcony 3 in this embodiment has at least a floor portion 12 and a handrail portion 13, and is sized to fit the building unit 2 and installed facing the same direction as the building unit 2. The balcony 3 is attached to the unit building 1 on the upper floor in a state that it overhangs from the unit building 1 (the building body).

[0017] The floor portion 12 is an approximately flat surface that is approximately rectangular in plan view and is strong enough for people to stand on. The handrail portion 13 is a vertical portion that rises from the edge of the floor portion 12 and is composed of a wall (handrail wall), a fence, or the like. The handrail portion 13 is provided along the side of the floor portion 12 that does not contact the building unit 2. In this embodiment, the handrail portion 13 is provided on two sides of the floor portion 12. The balcony 3 is manufactured as a balcony unit in which the floor portion 12 and the handrail portion 13 are integrated, in a manufacturing factory dedicated to balconies 3.

[0018] The balcony mounting structure is a structure for mounting a balcony 3 to a unit building 1.

[0019] In contrast to the basic configuration described above, in this embodiment, the balcony mounting structure is as follows.

[0020] (1) A joint bolt 22 is provided on the exterior-facing side 21 of the pillar 7 that constitutes the building unit 2, protruding outward perpendicular to the surface. As shown in FIG. 2 (or FIG. 3), the floor frame 23 of the balcony 3 is configured, and the end 25 of the end beam 24 on the column 7 side extends in a direction perpendicular to the side surface 21 of the column 7. An end plate 27 is attached to the side surface 21 of the column 7 and has a through hole 26 through which the joint bolt 22 passes. The end beam 24 has an opening 29 on its outer surface 28 that exposes the through-hole 26 to the outside.

[0021] Here, the pillars 7 are vertical members that make up the unit frame that is the basic skeleton of the building unit 2. The pillars 7 are provided at the positions of the four vertical sides of the roughly rectangular parallelepiped building unit 2, or at the positions on both sides of the four side surfaces of the building unit 2. For the pillars 7, square cylindrical metal members or the like are used.

[0022] The side surface 21 is the surface of the rectangular cylindrical pillar 7 facing the outside (particularly, the balcony 3 side).

[0023] The joint bolt 22 is a headless (high-strength) bolt for directly joining the building unit 2 and the balcony 3, and has threads on both ends. The threads on one end are screwed into the pillar 7, and the threads on the other end protrude from the pillar 7 almost perpendicular to its surface. A screw hole for screwing the joint bolt 22 into is formed in the pillar 7 beforehand at the manufacturing factory. The joint bolt 22 can be easily set into the pillar 7 by screwing it into the screw hole at the manufacturing factory or on the construction site.

[0024] The joint bolts 22 are installed around the lower ends of the pillars 7 of the upper floor building unit 2 (on the surface to which the balcony 3 is attached) so that they are in the position to attach the floor frame 23 of the balcony 3. One or more joint bolts 22 can be provided for each pillar 7. In this embodiment, two joint bolts 22 are installed side by side with a gap between them in the vertical direction 6.

[0025] In addition to the joint bolts 22, brackets 31 (Figure 1) for temporarily placing the balcony 3 are also installed on the building unit 2 (of its floor beams 9) on the upper floor. The temporary placement bracket 31 is an L-shaped cross-section corner fitting that supports the middle part of the floor frame 23 of the balcony 3 from below. The L-shaped cross-section bracket 31 has a vertical surface portion for attaching to the building unit 2, and a horizontal surface portion that projects outward from the bottom end of the vertical surface portion and supports the floor frame 23 of the balcony 3 from below.

[0026] The direction perpendicular to the surface is the horizontal direction (short side direction 5 in the drawing) that is perpendicular to the side surface 21 of the pillar 7.

[0027] The floor frame 23 is a frame body having a substantially rectangular shape in plan view that constitutes the floor portion 12 of the balcony 3. The floor frame 23 has a substantially rectangular shape in plan view, and is composed of a pair of short sides (end beams 24) and a pair of long sides (girder beams). The floor portion 12 of the balcony 3 is formed by installing a surface material or the like inside the floor frame 23.

[0028] The end beams 24 refer to one or both of the end beams that make up the short sides of the floor frame 23. In the drawing, the end beams 24 extend in the short side direction 5. The end beams 24 can also be used as a foundation (handrail end beam) for attaching the handrail portion 13 to the floor portion 12 of the balcony 3. The end beams 24 to which the handrail portion 13 is attached are formed so that their cross-sections are larger than those of the end beams 24 to which the handrail portion 13 is not attached.

[0029] The end portion 25 on the pillar 7 side is the end portion of the two end portions of the end beam 24 that faces the side of the building unit 2 (pillar 7). Note that, if necessary, a handrail post 32 or the like that constitutes the handrail portion 13 can be attached to the top of the end portion 25 on the pillar 7 side of the end beam 24.

[0030] The through holes 26 are single or multiple bolt holes for passing through the joint bolts 22, and are formed at positions that coincide with the respective joint bolts 22 of the columns 7 when the balcony 3 is attached to the building unit 2. In this embodiment, two upper and lower through holes 26 are formed in the end plate 27 to match the two upper and lower joint bolts 22. The balcony 3 is fastened and fixed to the building unit 2 by screwing nuts (not shown) from the tip side onto the joint bolts 22 that protrude into the end beam 24 through the through holes 26.

[0031] The end plate 27 is an abutment member for the column 7, attached integrally to the end 25 of the end beam 24. The end plate 27 mainly has an abutment surface (flat surface) parallel to the side surface 21 of the column 7. The end plate 27 is large enough to cover at least the entire cross section of the end beam 24. It is preferable that the end plate 27 be larger than the cross section of the end beam 24, as long as it does not protrude beyond the side surface 21 of the column 7.

[0032] The outer surface 28 is the side of the end beam 24 facing outward from the floor frame 23. In this case, the outer side is the side that is outside the floor frame 23 in the long side direction 4. The side is the outer vertical surface of the end beam 24.

[0033] The open portion 29 is a portion formed on the outer surface 28 of the end beam 24, which exposes the internal space of the end beam 24 to the outside at least at the end 25. In this embodiment, the end beam 24 is made of a steel section with a substantially C-shaped cross section. The end beam 24 is installed so that the open portion of the C faces outward from the floor frame 23. As a result, the end beam 24 has a relatively large open portion 29 formed on the outer surface 28 that extends in the extension direction (the short side direction 5 in the figure) over its entire length.

[0034] This opening 29 is closed by the lower part of an exterior wall 33 that is attached to the handrail portion 13 when the balcony 3 is manufactured. For the exterior wall 33 of the balcony 3, a material substantially similar to the exterior wall material 11 of the building unit 2 is used.

[0035] In this embodiment, the exterior wall 33 is installed so as to close off the opening 29 except for a portion of the end 25 on the building unit 2 side. As a result, when the balcony 3 is installed, an opening 29 is formed on the outer surface 28 of the end 25 of the gable beam 24 on the building unit 2 side by the portion of the exterior wall 33 where the exterior wall 33 has not yet been installed (portion where the exterior wall has not yet been installed). After the balcony 3 is installed, the portion where the exterior wall has not yet been installed, which has been made the opening 29, is closed off by an exterior wall piece similar to the exterior wall 33.

[0036] (2) As shown in FIG. 5 (or FIG. 6), the floor frame 23 of the balcony 3 may have a gable beam 24 and an eaves beam 41 extending along the building unit 2. The eaves beam 41 may be separated from the end beam 24, and joined in the extension direction of the eaves beam 41 (long side direction 4 in the figure) by an adjustment bolt 45, with the end face 42 abutting against the inner surface 43 of the end 25 of the end beam 24 on the column 7 side via a spacer 44. The adjustment bolt 45 may be exposed to the outside from an opening 29 formed on the outer surface 28 of the end beam 24.

[0037] Here, the eaves beam 41 is the girder beam located closer to the building unit 2 of the two girder beams that make up the long side of the floor frame 23 of the balcony 3. The girder beam located farther from the building unit 2 is the eaves beam. The eaves beam 41 and the eaves beam extend in the long side direction 4 in the drawing.

[0038] The separation of the eaves beam 41 from the end beam 24 means that the eaves beam 41 and the end beam 24 of the floor frame 23, which is approximately rectangular in plan view, are not joined (as an inseparable unit) by welding, for example, but are instead joined by bolts (bolted joint) while remaining separated. Therefore, the end beam 24 and the eaves beam 41 can be separated to create a gap by loosening or removing the adjustment bolts 45. This makes the bolted joint a width adjustment mechanism for the balcony 3 (its floor frame 23). However, even when joined (bolted joint) by the adjustment bolts 45, the floor frame 23 still has sufficient joint strength.

[0039] The floor frame 23 has four joints between the end beams 24 and the girder beams, but at least one of these, on the eaves side, needs to be separated and bolted, and the remaining three can be integrated by welding. Also, of the two joints between both ends of the eaves beam 41 and the pair of end beams 24, at least the joints on the side where the handrail portion 13 is provided can be bolted, but in this embodiment, both joints are bolted.

[0040] End face 42 is a vertical surface formed integrally with the terminal portion of eaves beam 41. End face 42 abuts directly or indirectly against the inner surface 43 of end beam 24. Eaves beam 41 may have any cross-sectional shape, such as a square tube, a C-shape, or an L-shape, but in any case, end face 42 is formed integrally.

[0041] The inner surface 43 is a vertical surface facing the inside of the floor frame 23 at the end 25 of the end beam 24. The inner surface 43 is formed as a web portion of the end beam 24 having a substantially C-shaped cross section.

[0042] The spacer 44 is a metal plate material used for gap and width adjustment. Multiple spacers 44 are prepared, with the same or different thicknesses. The spacer 44 has a surface parallel to the end face 42 of the eaves beam 41 and the inner surface 43 of the end beam 24, and is inserted between them from below. The spacer 44 has a notch 44a on its surface to prevent interference with the adjustment bolt 45. The notch 44a is formed vertically from the upper edge of the spacer 44 to a depth reaching the lowest adjustment bolt 45.

[0043] The spacer 44 has a perpendicular engaging portion 44b at its lower edge for engaging with the underside of the end beam 24 or eaves beam 41 from below, and the engaging portion 44b is temporarily fixed to the underside of the end beam 24 or eaves beam 41 using adhesive tape 46 or the like.

[0044] The adjustment bolt 45 is a bolt for joining the end beam 24 and the eaves beam 41, which are separated from each other, while having the function of adjusting the gap using the spacer 44, and is installed in the horizontal direction (long side direction 4 in the drawing). One or more adjustment bolts 45 can be provided, but in this embodiment, two are installed side by side with a gap in the vertical direction 6.

[0045] The extension direction is the direction in which the eaves beams 41 extend, and is set to a horizontal direction parallel to the outdoor surface of the building unit 2 (long side direction 4 in the drawing).

[0046] (3) With the head 51 of the adjustment bolt 45 restricted from rotation by the anti-rotation fitting 52, the body 53 may be inserted from the inside to the outside through the bolt hole 54 formed between the inner side of the end face 42 of the eaves beam 41 and the inner surface 43 of the end 25 of the gable beam 24 on the column 7 side.

[0047] Here, the head 51 is the large diameter portion of the adjustment bolt 45. In this embodiment, the head 51 has an angular shape having multiple pairs of parallel faces, such as a regular hexagon.

[0048] The anti-rotation fitting 52 is a fitting that restrains the head 51 to prevent co-rotation of the adjustment bolt 45. In this embodiment, the anti-rotation fitting 52 is a fitting that can accommodate the head 51 and has a C-shaped cross section with a width that is approximately the same as the two opposing faces of the head 51 (side faces). The anti-rotation fitting 52 has a through hole 52a through which the body 53 of the adjustment bolt 45 passes. The anti-rotation fitting 52 has a length that at least spans the heads 51 of the two adjustment bolts 45. The body 53 of the two adjustment bolts 45 pass through the through hole 52a at the same time, preventing the heads 51 from rotating at the same time, thereby preventing the rotation of the anti-rotation fitting 52 itself.

[0049] The head 51 of the adjustment bolt 45 and the anti-rotation fitting 52 are fixed to the end face 42 of the eaves beam 41 from the inner side of the end face 42 with adhesive tape 55 or the like.

[0050] The body portion 53 is the shaft portion of the adjustment bolt 45. The body portion 53 has a screw thread formed thereon.

[0051] The bolt holes 54 are holes through which the adjustment bolts 45 pass, and are formed through the inner side of the end face 42 of the eaves beam 41 and the inner surface 43 of the end 25 of the gable beam 24 on the column 7 side at positions that match each other.

[0052] The adjusting bolt 45 has a body 53 that protrudes from the bolt hole 54 into the inside of the end beam 24, and a nut 56 is screwed onto the tip side of the body 53, thereby fastening the eaves beam 41 and the end beam 24 together.

[0053] <Operation> The operation of this embodiment will now be described.

[0054] The building unit 2 is manufactured in a manufacturing plant for the building unit 2. Separately, the balcony 3 is manufactured in a manufacturing plant for the balcony 3.

[0055] Then, the building unit 2 and the balcony 3 are transported to the construction site, where the building unit 2 is installed on the ground and the balcony 3 is attached to the building unit 2.

[0056] In this embodiment, a joint bolt 22 protrudes from the outdoor-facing side surface 21 of a pillar 7 located on the outdoor side of the building unit 2 (on the upper floor) to which the balcony 3 is to be attached. A threaded hole is pre-formed in the pillar 7 at the manufacturing factory, so that the joint bolt 22 can be easily installed by screwing it into the threaded hole at any time. The balcony 3 is then directly fastened to the building unit 2 using this joint bolt 22. When there are two joint bolts 22, one above the other, the floor portion 12 is slightly tilted so that the lower joint bolt 22 is fitted into the through-hole 52a first, as shown in Figure 2 (or Figure 3), for example. This makes it possible to attach the balcony 3 without using an attachment.

[0057] In this case, because the building unit 2 and the balcony 3 are manufactured in separate factories, it is not possible to align the dimensions until they are actually installed at the construction site. Furthermore, there is a possibility that the building unit 2 and the balcony 3 each have dimensional errors. Therefore, to ensure that the balcony 3 can be installed securely on the building unit 2, the balcony 3 (at least the portion of the balcony 3 on the eaves side that is installed on the building unit 2) is always manufactured with a width slightly smaller than that of the building unit 2 (the portion of the balcony 3 that is installed on the building unit 2).

[0058] For example, in the comparative example of Figure 9, the balcony 3 is indirectly attached to the building unit 2 via an attachment 61. Therefore, in the comparative example, the gap that occurs due to the difference in width dimensions between the building unit 2 and the balcony 3 can be absorbed (gap absorption) between the attachment 61 attached to the building unit 2 and the balcony 3. However, if a structure is used without the attachment 61, this gap absorption means cannot be used.

[0059] Therefore, in this embodiment, the floor frame 23 of the balcony 3 is provided with a width adjustment function. As a result, even if the balcony 3 is directly fixed to the building unit 2 using joint bolts 22, the width of the balcony 3 can be adjusted using the floor frame 23 itself.

[0060] Specifically, first, as shown in Figure 4, the balcony 3 is temporarily placed on the building unit 2 (temporary placement bracket 31 attached to it), and the positional relationship between the joint bolt 22 of the building unit 2 and the through hole 52a in the floor frame 23 of the balcony 3 is confirmed.

[0061] If the positions of the joint bolts 22 and the through holes 52a do not align, loosen the adjustment bolts 45 to widen the gap between the eaves beams 41 and the end beams 24 of the floor frame 23. Then, adjust the width of the floor frame 23 by removing spacers 44 from the gap (Figure 8(a)) or inserting additional spacers 44 (Figure 8(b)) so that the gap corresponds to the amount of misalignment between the joint bolts 22 and the through holes 52a. After adjusting the width, tighten the adjustment bolts 45 again. This optimally adjusts the width of the floor frame 23, so that the positions of the joint bolts 22 and the through holes 52a align. This allows the balcony 3 to be attached to the building unit 2 without any problems.

[0062] <Effects> According to this embodiment, the following effects can be obtained.

[0063] (Effect 1) In the balcony mounting structure, the building unit 2 has joint bolts 22 protruding from the side surfaces 21 of the pillars 7. This allows the end portions 25 (end plates 27) of the end beams 24 that make up the floor frame 23 of the balcony 3 to be directly abutted against the side surfaces 21 of the pillars 7, making it possible to directly fasten and fix the end beams 24 with the joint bolts 22.

[0064] Therefore, for example, it becomes possible to attach the balcony 3 directly to the building unit 2 without using a special attachment 61 as in the comparative example of Figure 9, simplifying the balcony attachment structure. This also eliminates the need to attach the attachment 61 to the building unit 2 and then attach the balcony 3 to this attachment 61. This reduces the number of parts used, shortening the construction man-hours and cutting costs.

[0065] Additionally, the gable beam 24 has an opening 29 on its outer surface 28. As a result, the through-hole 26 is exposed to the outside by the opening 29, which makes it possible to attach the floor frame 23 of the balcony 3 using joint bolts 22. Moreover, the balcony 3 is attached from the side (and from the outside), ensuring the safety of the work.

[0066] Furthermore, the end beams 24 of the balcony 3 (its floor frame 23) are fixed perpendicular to the side surface 21 of the pillar 7 by joint bolts 22, so that the balcony 3 can also be prevented from tipping forward.

[0067] (Effect 2) The building units 2 and balconies 3 are basically manufactured in separate factories. Therefore, the balconies 3 are always manufactured with a width smaller than that of the building units 2 so that they can be reliably attached to the building units 2. In this case, if the floor frame 23 of the balcony 3 is constructed by welding the eaves beams 41 and the end beams 24 together, it will be difficult to absorb the gap caused by the difference in width between the building units 2 and the balconies 3 at the construction site if the balcony 3 is directly fixed with the joint bolts 22.

[0068] Therefore, the balcony mounting structure may be such that the eaves beam 41 and the end beam 24 are not integrated but are left separate. A spacer 44 may be interposed between the end face 42 of the eaves beam 41 and the inner surface 43 of the end 25 of the end beam 24 on the column 7 side. This makes it possible to easily adjust the width of the floor frame 23 of the balcony 3 by inserting and removing the spacer 44 at the construction site. Therefore, even if the building unit 2 and balcony 3 are manufactured in different manufacturing factories, the width of the balcony 3 can be adjusted with the spacer 44 at the construction site and it can be mounted to the building unit 2 with high precision.

[0069] In this case, the adjustment bolts 45 may be exposed to the outside through openings 29 formed on the outer surfaces 28 of the end beams 24. Therefore, width adjustment work can be performed from the side of the balcony 3 using the openings 29 on the outer surfaces 28 of the end beams 24, ensuring safety during the work.

[0070] (Effect 3) In the balcony mounting structure, the head 51 of the adjustment bolt 45 may be restricted from rotation by a rotation-preventing fitting 52. This reliably prevents the adjustment bolt 45 from rotating when adjusting the width of the balcony 3. The body 53 of the adjustment bolt 45 may be passed from the inside to the outside (of the floor frame 23) through a bolt hole 54 formed between the inner side of the end face 42 of the eaves beam 41 and the inner surface 43 of the end 25 of the end beam 24 on the column 7 side. This allows the width adjustment work to be easily performed from the outside of the balcony 3. [Explanation of symbols]

[0071] 2 Building Units 3 Balcony 7 Pillars 21 Side 22 Joint bolt 23 Floor frame 24 Tsumari 25 End 26 Through hole 27 End Plate 28 External surface 29 Open area 41 Eave base beam 43 Inner surface 44 Spacer 45 Adjustment bolt 51 Head 52 Anti-rotation fitting 53 Torso 54 bolt holes

Claims

1. A balcony mounting structure for mounting a balcony to a building unit, A joint bolt is provided on the exterior side of the pillar that constitutes the building unit, protruding outward perpendicular to the surface, The balcony floor frame is configured, and the end of the gable beam extending in a direction perpendicular to the side surface of the column is attached to the column side. an end plate is attached which is in surface contact with the side surface of the column and has a through hole through which the joint bolt passes; The end beam has an opening on the outer surface of the end portion on the column side that exposes to the outside the tip of the joint bolt that protrudes into the inside of the end beam through the through hole, The floor frame of the balcony has the gable beam and an eaves beam extending along the building unit, The eaves beam is separated from the gable beam, and the end face is abutted against the inner surface of the end of the gable beam on the column side via a spacer, and is joined in the extension direction of the eaves beam by an adjustment bolt, The adjustment bolt has a body portion whose tip protrudes into the end beam and is exposed to the outside from the opening formed on the outer surface of the end beam on the column side, The open portion is a portion where a nut is screwed onto the tip of the joint bolt from the outside of the floor frame of the balcony to directly fasten and fix the balcony to the building unit, and where another nut screwed onto the tip of the body of the adjustment bolt is operated from the outside of the floor frame of the balcony to adjust the width of the floor frame.

2. The balcony mounting structure according to claim 1, The balcony mounting structure is characterized in that the joint bolt is a headless bolt with threads on both ends, the threads on one end of which are screwed into a screw hole formed in the side of the column from the outside, and the threads on the other end of which protrude outward from the side of the column.

3. The balcony mounting structure according to claim 2, A balcony mounting structure characterized in that the adjustment bolt is fixed to the end face of the eaves beam from the inner side together with the anti-rotation fitting, with its head restricted from rotation by the anti-rotation fitting, and the body penetrates from the eaves beam side toward the end beam side through bolt holes formed at positions that match the end face of the eaves beam and the inner surface of the end of the end beam on the column side.

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