Window structure, sash installation method and metal fittings

Abstract

To provide means for safely and efficiently mounting a sash.SOLUTION: A window structure 30 includes a beam 31 extending in the horizontal direction of a building 10, a window base 34 mounted and fixed to the beam 31, a sash 33 mounted and fixed to the window base 34, and a floor material 32 spreading in the horizontal direction from the window base 34. The window base 34 has a first concave section 60 positioned between the sash 33 and the floor material 32 and opening to an indoor 17, and a second concave section 61 continuous to the first concave section 60 and positioned between the beam 31 and the sash 33 and opening to an outdoor 18.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a window structure including a window sill and a sash, a method for installing the sash, and metal fittings. [Background technology]

[0002] Patent Document 1 discloses a construction method for attaching a sash to a window sill. The sash is temporarily placed within reach of the hook of a crane at the work site, and is then suspended by the crane and moved to the construction position. Once moved to the construction position, the sash is temporarily secured to the window sill while still suspended by the crane, and the sling is removed. The sash is then lifted up by a lifting device fixed to a beam, and the bottom chord is removed from the sash. With the bottom chord removed, the sash is lowered to the window sill and secured there. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-123878 Summary of the Invention [Problem to be solved by the invention]

[0004] The sash installation method described in Patent Document 1 requires a lot of work, as it requires the sash suspended by a crane to be temporarily fixed and then raised and lowered using a hoisting tool. In addition, with heavy sashes, special consideration must be given to safety in order to ensure that the sash can be raised and lowered reliably.

[0005] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a means for safely and efficiently attaching a sash. [Means for solving the problem]

[0006] (1) A window structure according to the present invention comprises a horizontal member extending horizontally in a building, a window sill placed and fixed on the horizontal member, a sash placed and fixed on the window sill, and a floor material extending horizontally from the window sill. The window sill has a first recess located between the sash and the floor material and opening to the interior, and a second recess continuous with the first recess, located between the horizontal member and the sash, and opening to the outdoors.

[0007] According to the present invention, the sash together with the window sill can be lifted by a crane by hanging a sling between the first recess and the second recess.

[0008] (2) Claim 2 is the window structure according to claim 1, wherein the first recess is aligned along the vertical direction, and the second recess is aligned along a direction intersecting the vertical direction.

[0009] (3) Claim 3 is the window structure according to claim 1 or 2, further comprising a filler filled in the first recess and the second recess.

[0010] By filling the filler from at least one of the first recess and the second recess, airtightness of the building can be ensured.

[0011] (4) A sash installation method according to the present invention includes a first step of passing a sling through a recess located on the underside of a window sill connected to the lower end of the sash and opening to the outdoors and indoors; a second step of using the sling to lift the sash and the window sill with a crane; a third step of placing the window sill lifted by the sling on a cross member extending horizontally in a building; and a fourth step of removing the sling from the recess.

[0012] Since the sling can be easily removed from the sash with the window sill resting on the cross member, installation of the sash is easy.

[0013] (5) Claim 5 is a method for installing a sash according to claim 4, in which the sling has a metal fitting, and the metal fitting is inserted into the recess.

[0014] A metal fitting is inserted into the recess, and the sling is hung around the metal fitting.

[0015] (6) Claim 6 is a sash installation method according to claim 5, wherein the metal fitting is made up of a plurality of connected parts, and in the fourth step, the metal fitting is removed from the recess in a disassembled state into the plurality of parts.

[0016] The metal fitting is configured by connecting a plurality of parts, so that the metal fitting can be separated into a plurality of parts for carrying, etc.

[0017] (7) The metal fittings in this embodiment are fittings that are passed through a recess in a window sill fixed to the lower end of the sash, and have a first member and a second member that is detachable from the first member, wherein the first member has a horizontal plate portion having a plate shape extending laterally and a first vertical plate portion extending upward from the horizontal plate portion, and the second member has a second vertical plate portion extending upward from the horizontal plate portion when attached to the first member.

[0018] Since the metal fitting is passed through the recess, the metal fitting can be attached to and detached from the recess even if the portion of the metal fitting to which the sling is attached is large.

[0019] (8) Claim 8 is the metal fitting according to claim 7, wherein the first vertical plate portion has a first through hole at an upper end portion, and the second vertical plate portion has a second through hole at an upper end portion.

[0020] The sash is supported by the horizontal plate portion, while the first vertical plate portion and the second vertical plate portion extending upward from the horizontal plate portion prevent the sash from slipping off the horizontal plate portion.

[0021] (9) The metal fitting according to this embodiment is passed through a recess in a window sill fixed to the lower end of the sash. The metal fitting has a horizontal plate having through holes at both ends in the longitudinal direction, and vertical plates extending upward from between the through holes in the horizontal plate.

[0022] (10) The metal fitting according to this embodiment is passed through a recess in a window sill fixed to the lower end of the sash. The metal fitting has a horizontal plate having third through holes at both ends and a fourth through hole between the third through holes, and a fastener that is inserted through the fourth through hole and fixed to the horizontal plate. Effect of the Invention

[0023] According to the present invention, the sash can be installed safely and efficiently. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a cross-sectional view showing a window structure 30 according to one embodiment together with a building 10. [Diagram 2] FIG. 2 is an enlarged cross-sectional view of the window structure 30 shown in FIG. [Diagram 3] FIG. 3 is a perspective view showing the window sill 34 of the window structure 30. [Figure 4] FIG. 4 is a view of the window sill 34 seen from the right. [Diagram 5] FIG. 5 is a cross-sectional view showing the window structure 30 together with the metal fitting 80. As shown in FIG. [Figure 6] FIG. 6 is a perspective view showing a fitting 80 according to the embodiment. [Figure 7] 7(A) and 7(B) are diagrams for explaining a method of installing the sash 34. FIG. [Figure 8] 8(A) and 8(B) are diagrams for explaining a method of installing the sash 34. FIG. [Figure 9] 9(A) and 9(B) are diagrams for explaining a method of installing the sash 34. FIG. [Figure 10] FIG. 10 is a cross-sectional view showing a metal fitting 80A according to the first modification together with a recess 45A. [Figure 11] FIG. 11 is a perspective view showing a metal fitting 80A according to the first modification. [Figure 12] FIG. 12 is a perspective view showing a metal fitting 80B according to the second modification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, a window structure, a sash installation method, and a sash lifting hardware according to an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is merely one example of the present invention, and it goes without saying that the embodiment of the present invention can be appropriately modified without departing from the gist of the present invention.

[0026] In the following description, a vertical direction 1 is defined based on the top and bottom of the building 10, and a direction perpendicular to the vertical direction 1, passing through the sash 33 from the indoors 17 to the outdoors 18 and from the outdoors 18 to the indoors 17, is defined as a left-right direction 2. In addition, a direction perpendicular to the vertical direction 1 and the left-right direction 2 is defined as a front-rear direction 3.

[0027] As shown in FIG. 1, the building 10 is a two-story house. The building 10 has a base installed on a foundation 11, and multiple pillars 13 erected on the base. Beams 28, 31 are arranged between the pillars 13. The beam 28 extends along the left-right direction 2. The beam 31 (an example of a cross member) extends along the front-rear direction 3 (an example of a horizontal direction). The beams 28, 31 are supported by some of the multiple pillars 13. A ceiling structure 20 is arranged above the first floor 14 of the building 10, and a floor structure 21 is arranged below the second floor 15. A window structure 30 is arranged on the second floor 15 of the building 10.

[0028] The ceiling structure 20 has a joist support 22 fixed to the beams 31 and extending along the left-right direction 2, a joist 23 supported by the joist support 22 and extending along the front-back direction 3, and a ceiling board 24 fixed to the joist 23 and facing the interior of the first floor 14. A plurality of joists 23 are lined up in the left-right direction 2. A floor structure 21 of the second floor 15 is located above the ceiling structure 20.

[0029] The floor structure 21 has girths 25 fixed along beams 31, joists 26 extending in the left-right direction 2 and supported by the girths 25, and flooring 32 supported by the joists 26. The girths 25 extend along the front-to-rear direction 3 and are fixed to the beams 31 with screws (not shown). The joists 26 extend along the left-right direction 2. A plurality of the joists 26 are lined up in the front-to-rear direction 3. The joists 26 are fixed to the girths 25 with screws (not shown).

[0030] The floor material 32 forms a floor surface 37 of the second floor 15. The floor material 32 has a predetermined thickness, and is rectangular in shape that is longer in the front-to-back direction 3 than in the left-to-right direction 2 when viewed in the up-down direction 1. A plurality of floor materials 32 are arranged in the left-to-right direction 2 and the front-to-back direction 3.

[0031] As shown in FIG. 2, the window structure 30 includes a beam 31, a floor material 32, a sash 33, a window sill 34, and a filling material 35. The sash 33 is a fitting in which a frame and a paper screen are assembled. The window sill 34 is fixed to a lower end 42 of the sash 33. With the window sill 34 fixed, the sash 33 is installed in an opening 43 formed in an exterior wall 19 that separates the indoors 17 and the outdoors 18. The sash 33 is rectangular when viewed from the left-right direction 2. When the sash 33 is not installed, an upper frame 38 is located above the beam 31 with the opening 43 between them. The upper frame 38 extends along the front-rear direction 3. A pair of side frames (not shown) are located in front and behind the opening 43. The pair of side frames each extend in the up-down direction 1. The upper ends of the pair of side frames abut against the front and rear ends of the upper frame 38. The pair of side frames are attached to beams 31 at their respective lower ends.

[0032] The window sill 34 supports the sash 33. As shown in Figures 2 and 3, the window sill 34 has a generally rectangular shape that is longer in the front-to-back direction 3 than in the left-to-right direction 2 when viewed from the top-to-bottom direction 1. The window sill 34 has recesses 45 located at positions toward the front and rear. The lower end 42 of the sash 33 is placed on an upper surface 47 of the window sill 34 facing upward and is fixed with screws (not shown).

[0033] The upper surface 47 is a surface whose normal line runs along the vertical direction 1. The upper surface 47 is located above the floor surface 37. The window sill 34 is placed on the beam upper surface 46 facing upward in the beam 31 and fixed with a screw (not shown). That is, the lower surface 48 (see FIG. 4) of the window sill 34 facing downward abuts against the beam upper surface 46. The beam upper surface 46 is a surface whose normal line runs along the vertical direction 1. The lower surface 48 is located below the floor surface 37. When the window sill 34 is fixed to the beam upper surface 46, it is located to the left of the floor material 32. More specifically, the right surface 49 of the window sill 34 facing right abuts against the floor left surface 55 facing left of the floor material 32 located at the leftmost position in the room 17. The window sill 34 is located between a pair of side frames in the front-rear direction 3. An extension 51 extending downward from the bottom end 42 is located on the left surface 50 of the window sill 34 facing left. The leftward movement of the window sill 34 is restricted by the extension 51. The extension 51 is fixed to the left surface 50. The right surface 49, the left floor surface 55, and the left surface 50 are surfaces whose normals are aligned in the left-right direction 2.

[0034] As shown in Figs. 2 and 4, the recess 45 has a first recess 60 and a second recess 61. The first recess 60 is a groove that opens in the up-down direction 1 and to the right. When the window sill 34 is fixed to the beam 31, the first recess 60 is located between the sash 33 and the floor material 32 in the left-right direction 2. The first recess 60 is aligned along the up-down direction 1. The first recess 60 opens upward and to the right to the interior 17. The first recess 60 is defined in the left-right direction 2 by a first concave surface 64. The first recess 60 is also defined in the front-rear direction 3 by a front concave surface 65 and a rear concave surface 66.

[0035] The first concave surface 64 is a surface of the window sill 34 facing to the right, and extends in the up-down direction 1 and the front-rear direction 3. The first concave surface 64 is a surface whose normal is along the left-right direction 2. The first concave surface 64 is located between the right surface 49 and the left surface 50 in the left-right direction 2. When the window sill 34 is fixed to the beam upper surface 46, the first concave surface 64 faces the floor left surface 55 across the first recess 60. The first concave surface 64 is located a distance D1 (see FIG. 2 ) from the right surface 49 in the left-right direction 2.

[0036] The front concave surface 65 is a surface on the window sill 34 that faces forward and extends in the up-down direction 1 and the left-right direction 2. The front concave surface 65 is a surface whose normal runs along the front-to-back direction 3. The front concave surface 65 is connected to the rear end of the first concave surface 64. The rear concave surface 66 is a surface on the window sill 34 that faces backward and extends in the up-down direction and the left-right direction 2. The rear concave surface 66 is a surface whose normal runs along the front-to-back direction 3. The rear concave surface 66 is connected to the front end of the first concave surface 64. The rear concave surface 66 is located a distance D2 (see Figure 4) from the front concave surface 65 in the front-to-back direction 3.

[0037] The second recess 61 is a groove that opens downward and in the left-right direction 2. The second recess 61 is located below the first recess 60. When the window sill 34 is fixed to the beam 31, the second recess 61 is located between the lower end 42 and the upper surface 46 of the beam, and the left side opens to the outdoors 18. The second recess 61 is aligned in the left-right direction 2. The second recess 61 is continuous with the first recess 60 on the right side. In other words, the right side of the second recess 61 is connected to the lower end of the first recess 60. The second recess 61 is defined in the up-down direction 1 by the second concave surface 70.

[0038] The second concave surface 70 is a surface of the window sill 34 facing downward, and extends in the left-right direction 2 and the front-rear direction 3. The second concave surface 70 is a surface whose normal is along the up-down direction 1. When the window sill 34 is fixed to the beam upper surface 46, the second concave surface 70 is located above the lower surface 48 and below the floor surface 37. The second concave surface 70 faces the beam upper surface 46, and is located a distance D3 away from the beam upper surface 46 in the up-down direction 1. The second concave surface 70 is connected to the front concave surface 65 and the rear concave surface 66, and is located between the front concave surface 65 and the rear concave surface 66.

[0039] The filler 35 is a member that is filled into the first recess 60 and the second recess 61 when the window sill 34 is fixed to the beam upper surface 46. The filler 35 is made of, for example, synthetic resin or wood. As shown in FIG. 2, the filler 35 has a first filler 75 and a second filler 76 (shown by a broken line in FIG. 2). The first filler 75 fills the first recess 60. The first filler 75 has a rectangular parallelepiped shape with a dimension in the up-down direction 1 that is the same as the dimension of the first concave surface 64, a dimension in the left-right direction 2 that is D1, and a dimension in the front-rear direction 3 that is D2. When the first filler 75 is filled into the first recess 60, it abuts against the first concave surface 64, the floor left surface 55, the front concave surface 65, and the rear concave surface 66.

[0040] The second filling material 76 fills the second recess 61. The second filling material 76 has a rectangular parallelepiped shape with a dimension D3 in the up-down direction 1, a dimension D2 in the left-right direction 2 that is the same as the dimension D2 in the left-right direction 2 of the beam upper surface 46, and a dimension D2 in the front-rear direction 3. When filled in the second recess 61, the second filling material 76 abuts against the second concave surface 70, the beam upper surface 46, the front concave surface 65, and the rear concave surface 66.

[0041] The sling 56 has a metal fitting 80. The metal fitting 80 around which the sling 56 is hung is located in the recess 45 (see FIG. 5). The sling 56 is hung on a hook (not shown) of a crane (not shown). The metal fitting 80 is located in the recess 45 of the window sill 34 when the sash 33 is installed in the building 10. As shown in FIGS. 5 and 6, the metal fitting 80 in this embodiment is substantially U-shaped when viewed from the front-rear direction 3. The metal fitting 80 is formed by rolling a metal plate. The metal fitting 80 has a first member 85 and a second member 86.

[0042] With one end of the first member 85 inserted into the recess 45, the other end protrudes outside 18. The first member 85 has a first piece 90 to which the sling 56 is attached, a second piece (an example of a first vertical plate portion) 91 extending downward from the lower end of the first piece 90, and a third piece (an example of a horizontal plate portion) 92 extending rightward from the lower end of the second piece 91.

[0043] The first piece 90 has a through hole (an example of a first through hole) 93 penetrating in the thickness direction. The through hole 93 is hung with a sling 56. The first piece 90 is inclined with respect to the up-down direction 1. The upper end side of the first piece 90 is located to the left of the second piece 91. The second piece 91 is aligned with the up-down direction 1 and the front-rear direction 3. The third piece 92 has a main surface 94 facing upward and a protrusion 95 protruding upward from the main surface 94. The main surface 94 abuts against the second concave surface 70 when inserted into the recess 45. The main surface 94 is aligned with the left-right direction 2 and the front-rear direction 3. The protrusion 95 extends in the front-rear direction 3 while being aligned with the main surface 94. The protrusion 95 is located to the left of the main surface 94 in the left-right direction 2. A through hole (not shown) penetrates the right end of the third piece 92 in the up-down direction 1. There are two through holes located at the front and rear of the third piece 92. A nut 96 is fixed to the underside of the third piece 92 at a position where the through holes overlap.

[0044] With one end of the second member 86 inserted into the recess 45, the other end protrudes into the indoors 17. The second member 86 has a fourth piece 100 connected to the third piece 92, a fifth piece (an example of a second vertical plate portion) 101 extending upward from the right end of the fourth piece 100, and a sixth piece 102 extending from an upper end of the fifth piece 101.

[0045] The fourth piece 100 has a through hole (not shown) penetrating in the up-down direction 1. The fourth piece 100 has two through holes located at the front and rear. A bolt 104 is inserted into the through hole of the fourth piece 100 and is screwed with a nut 96. The fourth piece 100 is connected to the third piece 92. When connected to the third piece 92, the fourth piece 100 is aligned in the left-right direction 2 and the front-back direction 3. The fifth piece 101 is aligned in the up-down direction 1. The sixth piece 102 has a through hole (an example of a second through hole) 103 penetrating in the thickness direction. A sling 56 is hung around the through hole 103. The sixth piece 102 is inclined with respect to the up-down direction 1. The upper end side of the sixth piece 102 is located to the right of the fifth piece 101.

[0046] [Installation method for Sash 33] Hereinafter, the construction method of the sash 33 will be described with reference to Figs. 7, 8 and 9. The construction method for installing the sash 33 in the building 10 includes a first step of positioning the metal fittings 80 of the sling 56 in the recess 45, a second step of lifting the window sill 34 to which the sash 33 is fixed with a crane, a third step of placing the window sill 34 on the beam 31, and a fourth step of removing the metal fittings 80 from the recess 45. The window sill 34 of the sash 33 is fixed with screws in a factory. The sash 33 to which the window sill 34 is attached is transported to the construction site on the loading platform C of a truck. The sash 33 on the loading platform C is lifted by a crane and installed in the building 10 while being supported by a worker working on scaffolding near the second floor 15. The building 10 is in a state in which the beams 31 and floor structure 21 have been constructed, and scaffolding has been set up around the building 10.

[0047] As shown in FIG. 7(A), the worker performs the first step of positioning the metal fitting 80 in the recess 45 in the bed C of the truck. Specifically, the worker first inserts the third piece 92 into the second recess 61. When the third piece 92 is inserted into the second recess 61, the surface facing to the right of the protrusion 95 abuts against the surface facing to the left of the extension 51. Next, the worker inserts the fourth piece 100 into the first recess 60. The worker aligns the through hole of the fourth piece 100 with the through hole of the third piece 92 in the vertical direction 1, and screws the bolt 104 into the nut 96.

[0048] As shown in Fig. 7(B), the worker performs the second step of hanging the sling 56 through the through holes 93 and 103, and lifting the sash 33 together with the window sill 34 from the bed C of the truck with a crane. At this time, the metal fitting 80 is adjusted so that the right side of the third piece 92 is higher than the left side. Therefore, the convex portion 95 abuts against the extension portion 51, and the sash 33 is prevented from shifting in the left-right direction 2 relative to the metal fitting 80. The metal fitting 80 is also prevented from shifting in the front-rear direction 3 by abutting against the front concave surface 65 and the rear concave surface 66.

[0049] As shown in Figure 8 (A), the worker performs the third step of placing the lifted sash 33 in the opening 43 (see Figure 1) of the exterior wall 19 and placing the window sill 34 on the upper surface 46 of the beam. At this time, the upper frame 38 is not installed on the exterior wall 19, and a space is formed above the sash 33. Therefore, the sling 56 is not sandwiched between the sash 33 and the upper frame 38. In this state, the worker removes the sling 56 from the hook and pulls the sling 56 to both the indoor 17 side and the outdoor 18 side. After removing the sling 56, the worker attaches the upper frame 38.

[0050] With the window sill 34 placed on the beam upper surface 46, the worker performs the fourth step of removing the metal fitting 80 from the recess 45. Specifically, as shown in Figure 8 (B), the worker removes the bolt 104, removes the second member 86 from the first recess 60, and removes the first member 85 from the second recess 61. Since the metal fitting 80 is located in the recess 45, it is not sandwiched between the window sill 34 and the beam upper surface 46, and can be easily removed from the recess 45.

[0051] The worker moves the window sill 34 to the right relative to the beam 31, and abuts the right surface 49 against the left surface 55 of the floor (see FIG. 9(A)). The worker fixes the window sill 34 to the beam 31 with screws (not shown). The worker fills the first filler 75 into the first recess 60 from above, and fills the second filler 76 into the second recess 61 from the left (see FIG. 9(B)). Note that the metal fitting 80 may be removed from the recess 45 with the right surface 49 of the window sill 34 abutting against the left surface 55 of the floor.

[0052] [Effects of this embodiment] Conventionally, when installing the sash 33, a worker had to carry the sash 33 with the window sill attached from the indoors 17 to the outdoors 18 where scaffolding was set up, temporarily place it on the upper surface of the beam 46, and then lift it again to remove the window sill 34 from the sash 33. However, in the present invention, the metal fittings 80 of the sling 56 are hung on the first recess 60 and the second recess 61, and the sash 33 together with the window sill 34 is lifted and moved by a crane, and the sash 33 can be installed without temporary placement and re-lifting work. Therefore, the worker does not have to perform unstable and dangerous work such as lifting the heavy sash 33 on the scaffolding on the second floor 15, and the sash 33 can be installed in the building 10 safely and efficiently.

[0053] In addition, by filling at least one of the first recess 60 and the second recess 61 of the window sill 34 installed on the beam upper surface 46 with filling material 35, the interior 17 can be isolated from the exterior 18, thereby ensuring the airtightness of the building 10.

[0054] In addition, in installing the sash 33, the process of removing the window sill 34 from the sash 33 is not required, and the number of work steps can be reduced.

[0055] Furthermore, metal fitting 80 is inserted into recess 45, instead of sling 56. Therefore, even if it is difficult to pass sling 56 through recess 45, it can be easily passed through. Sling 56 is looped around metal fitting 80.

[0056] Since the metal fitting 80 can be separated into two parts, the first member 85 and the second member 86, it is easy to carry.

[0057] Since the second member 86 can be attached and detached with the first member 85 inserted into the recess 45, as long as the third piece 92 of the first member 85 is large enough to be inserted into the second recess 61 and the fourth piece 100 and the fifth piece 101 of the second member 86 are large enough to be inserted into the first recess 60, the first piece 90, the second piece 91, and the sixth piece 102 can be positioned in the recess 45 even if they are larger than the recess 45.

[0058] While the sash 33 is supported by the third piece 92, the second piece 91 and the fifth piece 101 extending upward from the third piece 92 prevent the sash 33 from slipping off the third piece 92. Therefore, the sash can be supported in a well-balanced manner, and the sash 33 can be safely lifted and moved.

[0059] [Variation 1] In the above-described embodiment, when viewed from the front-to-rear direction 3, the recess 45 has a first recess 60 and a second recess 61, and the first recess 60 and the second recess 61 form an L-shaped space. However, this configuration is not limited to this.

[0060] As shown in FIG. 10, the recess 45A is a groove formed on the lower surface 48 of the window sill 34. When the window sill 34A is fixed to the beam 31, the recess 45A is surrounded by the sash 33, the beam upper surface 46, and the floor material 32. The left side of the recess 45A is open to the outdoors 18, and the right side is open to the indoors 17. The recess 45A is defined in the vertical direction 1 by a concave surface 64A. The recess 45A is also defined in the front-rear direction 3 by a front concave surface (not shown) facing forward in the window sill 34, and a rear concave surface 66A facing backward in the window sill 34. The front concave surface and the rear concave surface 66A are surfaces whose normals are along the front-rear direction 3. The concave surface 64A is a flat surface facing downward to the right. The concave surface 64A is a surface whose normals are along a direction inclined with respect to the vertical direction 1. The concave surface 64A is located between the right surface 49 and the left surface 50 in the left-right direction 2. The concave surface 64A intersects with the right surface 49 and the left surface 50.

[0061] As shown in Figs. 10 and 11, the metal fitting 80A in this modification has a horizontal plate 108A and a protrusion (an example of a vertical plate) 109. The horizontal plate 108A has a generally flat plate shape. When the horizontal plate 108A is inserted into the recess 45A, one end of the horizontal plate 108A protrudes to the outdoors 18 and the other end of the horizontal plate 108A protrudes to the indoors 17. The horizontal plate 108A has a rectangular outer shape when viewed in the thickness direction. Through holes 110A, 110A penetrate the horizontal plate 108A in the thickness direction at both ends in the longitudinal direction. A sling 56 is hung around the through holes 110A, 110A.

[0062] A protrusion 109 is located on the main surface 94A of the horizontal plate 108A, which faces the recessed surface 64A of the horizontal plate 108A when the horizontal plate 108A is inserted into the recessed portion 45A, at a position closer to the left. The protrusion 109 protrudes upward from the main surface 94A. The protrusion 109 extends in the front-rear direction 3.

[0063] When metal fitting 80A is inserted into recess 45A, the surface facing right of protrusion 109 abuts against the surface facing left of extension 51. Metal fitting 80A is adjusted so that the right side of horizontal plate 108A is higher than the left side. Therefore, protrusion 95 abuts against extension 51, and it is possible to prevent sash 33 from shifting in left-right direction 2 relative to metal fitting 80.

[0064] [Variation 2] In the above-described embodiment and modified example 1, the case where the metal fittings 80, 80A have the protrusion 109 has been described as an example, but the present invention is not limited to this configuration. For example, as shown in Fig. 12, the metal fitting 80B may have at least one bolt (an example of a fastener) 115, which abuts against the left-facing surface of the extension 51 when inserted into the recess 45, with the head protruding upward from the main surface 94B. Note that the bolt 115 is not limited to this, and may be any bolt that protrudes upward from the main surface 94B and abuts against the extension 51.

[0065] The metal fitting 80B has a horizontal plate 108B having a substantially flat plate shape with a predetermined thickness. The horizontal plate 108B has a rectangular outer shape when viewed in the thickness direction. The horizontal plate 108B has a main surface 94B facing the thickness direction. The horizontal plate 108B has through holes (examples of third through holes) 116B and 118B penetrating in the thickness direction at both ends in the longitudinal direction.

[0066] The through holes 116B and 118B open in a rectangular shape. Two through holes (fourth through holes) 117B and 119B penetrate the horizontal plate 108B in the thickness direction at a position between the through holes 116B and 118B. The through holes 117B and 119B open in a circular shape, and a bolt 115 can be screwed into them. The bolt 115 is screwed into a position toward one side in the longitudinal direction of the horizontal plate 108B. The bolt 115 may be screwed into the through hole 119B penetrating the horizontal plate 108B at a position toward the other side in the longitudinal direction, or may be screwed into both the through holes 117B and 119B.

[0067] The worker loops sling 56 around through holes 116B and 118B and adjusts it so that the side of horizontal plate 108B on which bolt 115 is located is lower than the other side in the longitudinal direction of horizontal plate 108B when lifting it up. This causes bolt 115 to come into contact with extension 51 while sash 33 is moving, and prevents sash 33 from shifting toward the side on which bolt 115 is located with respect to metal fitting 80B.

[0068] [Other variations] In the above embodiment, the filler 35 is the first filler 75 and the second filler 76 each having a rectangular parallelepiped shape, but the present invention is not limited to this configuration. The filler 35 only needs to be able to close the recess 45 and separate the indoor space 17 from the outdoor space 18.

[0069] In the above embodiment, the metal fitting 80 is configured by connecting the first member 85 and the second member 86, but the present invention is not limited to this configuration. The metal fitting 80 may be configured by two or more members as long as it can be positioned in the recess 45.

[0070] In the above embodiment, the window structure 30 is installed on the exterior wall 19 on the second floor, but the present invention is not limited to this configuration. The window structure 30 may be installed on the first floor.

[0071] In the above embodiment, the case where the metal fitting 80 is hung in the recess 45 has been described as an example, but the present invention is not limited to this configuration. The sling 56 hung on the hook of the crane may be hung directly in the recess 45 without using the metal fitting 80.

[0072] In the above embodiment, the sling 56 is described as being hung around the through holes 93, 103, but the present invention is not limited to this configuration. The sling 56 may be attached to the through holes 93, 103 via a shackle.

[0073] In the above embodiment, the building 10 is a residence, but the present invention is not limited to this. The building 10 may be, for example, a store or an apartment building.

[0074] In the above embodiment, the worker places the window sill 34 in a position toward the left of the beam upper surface 46 in the third step, removes the sling 56 from the crane, and stores it on the outdoor side and indoor side relative to the sash 33. However, the present invention is not limited to this configuration. In the third step, the worker may place the window sill 34 on the beam upper surface 46 with the left surface 50 abutting against the left floor surface 55. In this case, the worker removes the sling 56 from the crane in this placement position, and stores the sling 56 on the indoor 17 side and outdoor 18 side relative to the sash 33.

[0075] In the above embodiment, the protrusion 95 is located to the left in the left-right direction 2 of the main surface 94, but the location is not limited to this. The protrusion 95 may be located anywhere in the left-right direction 2 of the main surface 94, and for example, the protrusion 95 may be arranged so that the center of gravity of the sash 33 and window sill 34 is located at the center of the metal fitting 80 in the left-right direction 2. This allows the sash 33 and window sill 34 to be suspended in a stably state.

[0076] [Appendix 1] A horizontal member extending horizontally in the building; A window sill that is placed on and fixed to the cross member; A sash that is placed and fixed to the window sill; and a flooring material extending horizontally from the window sill, The above window sill is A first recess portion located between the sash and the floor material and opening to the interior of the room; a second recess that is continuous with the first recess, is located between the cross member and the sash, and opens to the outdoors.

[0077] [Appendix 2] The first recess is aligned along the vertical direction, 2. The window structure according to claim 1, wherein the second recess is aligned in a direction intersecting with the up-down direction.

[0078] [Appendix 3] 3. The window structure according to claim 1, further comprising a filler material filled in the first recess and the second recess.

[0079] [Appendix 4] A first step of passing a sling through a recess located on the underside of a window sill connected to the lower end of the sash and opening to the outside and the inside; a second step of hoisting the sash and the window sill with a crane using the sling; A third step of placing the window sill lifted by the sling on a horizontal member extending horizontally in the building; and a fourth step of removing the sling from the recess.

[0080] [Appendix 5] The sling has a metal fitting, 5. A method for installing a sash as described in appendix 4, wherein the metal fitting is inserted into the recess.

[0081] [Appendix 6] The above fitting is made up of multiple connected parts, The sash installation method according to claim 5, wherein in the fourth step, the metal fitting is removed from the recess in a disassembled state into the plurality of parts.

[0082] [Appendix 7] A metal fitting that is inserted into a recess in a window sill fixed to the lower end of the sash, The device has a first member and a second member that is detachable from the first member, The first member has a horizontal plate portion having a plate shape extending laterally and a first vertical plate portion extending upward from the horizontal plate portion, The second member is a metal fitting having a second vertical plate portion extending upward from the horizontal plate portion when attached to the first member.

[0083] [Appendix 8] The first vertical plate portion has a first through hole at an upper end portion, The metal fitting according to claim 7, wherein the second vertical plate portion has a second through hole at an upper end portion.

[0084] [Appendix 9] A metal fitting that is inserted into a recess in a window sill fixed to the lower end of the sash, A horizontal plate having through holes at both ends in a longitudinal direction; a vertical plate extending upward from between the through holes in the horizontal plate.

[0085] [Appendix 10] A metal fitting that is inserted into a recess in a window sill fixed to the lower end of the sash, a horizontal plate having third through holes at both ends and a fourth through hole between the third through holes; A metal fitting having a fastener that is inserted into the fourth through hole and fixed to the horizontal plate. [Explanation of symbols]

[0086] 10. Building 17. Indoor 18. Outdoor 30... Window structure 31... Beam (horizontal member) 32...Flooring 33...Sash 34... Window sill 35...Filling material 42....(Bottom end of sash 33) 45 Recess 48...Bottom surface 56 Sling 60...First recess 61...Second recess 80, 80A, 80B... Fittings 85...First member 86...Second member 91...Second piece (first vertical plate part) 92...3rd piece (horizontal plate part) 93...Through hole (first through hole) 101...5th piece (2nd vertical plate part) 103... Through hole (second through hole) 108A,108B...Horizontal plate 110A...Through hole 115···Bolt (fixture) 116B...Through hole (3rd through hole) 117B...Through hole (4th through hole)

Claims

1. A horizontal member extending horizontally in the building; A window sill that is placed on and fixed to the cross member; A sash that is placed and fixed to the window sill; and a flooring material extending horizontally from the window sill, The above window sill is a first recess located between the sash and the floor material and opening to the interior; a second recess that is continuous with the first recess, is located between the cross member and the sash, and opens to the outdoors.

2. The first recess is aligned along the up-down direction, The window structure according to claim 1 , wherein the second recess is aligned along a direction intersecting the up-down direction.

3. The window structure according to claim 1 , further comprising a filler material filled in the first recess and the second recess.

4. A first step of inserting a metal fitting of a sling into a recess located on the underside of a window sill connected to a lower end of the sash and opening to the outside and the inside of the window; a second step of hoisting the sash and the window sill with a crane using the sling; A third step of placing the window sill lifted by the sling on a horizontal member extending horizontally in the building; and a fourth step of removing the metal fitting of the sling from the recess.

5. The above fitting is made up of multiple connected parts, 5. The sash installation method according to claim 4, wherein in the fourth step, the metal fitting is removed from the recess in a state where it is disassembled into the plurality of parts.

6. A metal fitting that is passed through a recess in a window sill fixed to the bottom end of the sash, The device has a first member and a second member that is detachable from the first member, The first member has a horizontal plate portion having a plate shape extending laterally and a first vertical plate portion extending upward from the horizontal plate portion, The second member is a metal fitting having a second vertical plate portion extending upward from the horizontal plate portion when attached to the first member.

7. The first vertical plate portion has a first through hole at an upper end portion, 7. The metal fitting according to claim 6, wherein the second vertical plate portion has a second through hole at an upper end portion.

8. A metal fitting that is passed through a recess in a window sill fixed to the bottom end of the sash, A horizontal plate having through holes at both ends in a longitudinal direction; a vertical plate extending upward from between the through holes in the horizontal plate.

9. A metal fitting that is passed through a recess in a window sill fixed to the bottom end of the sash, a horizontal plate having third through holes at both ends and a fourth through hole between the third through holes; a fastener that is inserted into the fourth through hole and fixed to the horizontal plate.

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