JP6498108B2 - Joinery - Google Patents

Description

  The present invention relates to a joinery, and more particularly, to a joinery including a frame member in which two frame elements are connected by a heat insulating material.

  A frame member applied to a fitting such as an entrance door is configured by arranging two metal frame elements side by side along a prospective direction in a non-contact state and connecting each other with two heat insulating materials. (See, for example, Patent Document 1). According to the joinery including this type of frame member, the heat insulating material is interposed between the two frame elements, and the hollow portion between the two frame elements becomes a heat insulating space, so that heat transfer inside and outside is suppressed. For example, there is an advantage that condensation does not occur in the indoor side portion of the frame member.

JP 2012-229558 A

  As the heat insulating material, a resin having a thermal conductivity smaller than that of a metal is generally applied. For this reason, when the frame member is heated, such as when a fire breaks out, the heat insulating material is melted first, and the hollow portion between the two frame elements may become a flame through hole.

  In view of the above circumstances, an object of the present invention is to provide a joinery that can suppress heat transfer indoors and outdoors while maintaining fire resistance.

  In order to achieve the above object, a joinery according to the present invention includes two frame elements in a state in which two frame elements are arranged side by side along a prospective direction in a non-contact state and a hollow portion is formed between them. In a joinery that forms a frame member by connecting elements with a heat insulating material, a thermally expandable member that expands when heated is arranged so that the hollow portion becomes an expansion space. .

  According to the present invention, when heated in the event of a fire or the like, the thermally expandable member expands and fills the hollow portion between the two frame elements, so that the hollow portion may become a flame through-hole. There is no.

  In the joinery described above, the present invention is characterized in that an expansion member is formed from a material including the thermally expandable member, and the expansion member is inserted into the hollow portion along the longitudinal direction.

  According to the present invention, it is not necessary to hold the thermally expandable member on the inner surface of the hollow portion, and it is only necessary to insert the expandable member into the hollow portion, so that the manufacturing work of the frame member is not complicated.

  In the joinery described above, the present invention is characterized in that the thermally expandable member is held on the surface of the insertion member, and the insertion member is inserted into the hollow portion along the longitudinal direction.

  According to the present invention, it is not necessary to hold the thermally expandable member on the inner surface of the hollow portion, and it is only necessary to insert the insertion member into the hollow portion, so that the manufacturing work of the frame member is not complicated.

  In the joinery described above, the present invention is characterized in that the heat insulating material and the thermally expandable member are integrally formed so that at least a portion facing the hollow portion includes the thermally expandable member.

  According to the present invention, there is no need to hold the thermally expandable member on the inner surface of the hollow portion, and it is only necessary to connect the two frame elements with the heat insulating material, so that the manufacturing work of the frame member is not complicated.

  In the joinery described above, the two frame elements each include a heat insulating material accommodating portion that accommodates the heat insulating material along the longitudinal direction on both sides of a portion facing each other. The heat insulating materials are connected to each other by disposing the heat insulating materials between the portions facing each other, and when the heat insulating material is injected between at least one of the portions of the heat insulating material accommodation portion facing each other, The sheet material is provided on one surface of the sheet material facing the hollow portion, and the heat insulating material is provided on the other surface of the sheet material. It is characterized by that.

  According to this invention, when injecting the heat insulating material, the gap between the heat insulating material accommodating portions is closed, and the heat expandable member is provided on the sheet material that prevents the heat insulating material from leaking out. There is no need to hold the thermally expandable member on the inner surface of the portion, and there is no possibility that the manufacturing work of the frame member becomes complicated.

  According to the present invention, when heated in the event of a fire or the like, the thermally expandable member expands and fills the hollow portion between the two frame elements, so that the hollow portion may become a flame through hole. There is no. Therefore, it is possible to suppress heat transfer inside and outside the room while maintaining the desired fire resistance of the frame member.

FIG. 1 is a view of a joinery that is Embodiment 1 of the present invention as seen from the outdoor side. FIG. 2 is a view of the joinery shown in FIG. 1 as viewed from the indoor side. FIG. 3 is a cross-sectional view of a main part of the joinery shown in FIG. FIG. 4 is a cross-sectional view of a main part of a joinery that is Embodiment 2 of the present invention. FIG. 5 is a cross-sectional view of a main part of a joinery that is Embodiment 3 of the present invention. FIG. 6 is a cross-sectional view of a main part of a joinery that is Embodiment 4 of the present invention. FIG. 7 is a cross-sectional view of an essential part showing a manufacturing process of a frame member applied to the joinery shown in FIG.

  Hereinafter, preferred embodiments of a fitting according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)
1 and 2 show a joinery that is Embodiment 1 of the present invention. The joinery illustrated here is an opening door used for the entrance of a house, and includes a frame body 10. The frame 10 is vertically arranged between a rectangular outer frame portion 10 </ b> A configured by quadrangling the upper frame 11, the lower frame 12, and the left and right vertical frames 13, 14, and the upper frame 11 and the lower frame 12. And a vertical frame (frame member) 15 disposed along. In the first embodiment, as is apparent from FIGS. 1 and 2, the vertical frame 15 is arranged at a position shifted from the center line that bisects the lengths of the upper frame 11 and the lower frame 12. Yes. Specifically, when viewed from the outdoor side, a vertical frame 15 is provided so as to be close to the left vertical frame 13 arranged on the left side, and the opening of the outer frame portion 10A is divided into a main opening 10Aa and a sub-opening 10Ab. Divided into two.

  The main opening 10Aa is a wide opening formed between the right vertical frame 14 and the vertical frame 15 disposed on the right side when viewed from the outdoor side. The main opening 10Aa is provided with a door panel 20 that can be opened and closed so that the right vertical frame 14 is a hanging source and the vertical frame 15 is a door, and opens toward the outdoor side. Although not clearly shown in the figure, the door panel 20 is called a heat insulating door configured by disposing a heat insulating surface material made of a foam material or the like between the front and back double-sided plates. The sub-opening 10Ab is a small opening formed between the left vertical frame 13 and the vertical frame 15. In the sub-opening 10Ab, a FIX window is formed by disposing a glass panel 30. As shown in FIG. 3, the glass panel 30 is called multi-layer glass formed by joining two glasses 32 and 33 through a spacer member 31.

  The standing frame 15 of the joinery is configured by arranging two frame elements 15A and 15B side by side in the prospective direction and connecting two portions between each other with a heat insulating material 15C. A hollow portion 15D is formed in a portion surrounded by the two frame elements 15A and 15B and the two heat insulating materials 15C. Here, the prospective direction is a direction along the depth of the joinery as indicated by an arrow A in FIG. A plane along the prospective direction may be referred to as a prospective surface. In addition, in the case of the upper frame 11 and the lower frame 12, the finding direction to be described later is a direction along the top and bottom perpendicular to the prospective direction, and in the case of the vertical frames 13 and 14, it is a direction along the horizontal perpendicular to the prospective direction. . The longitudinal direction of the frame member coincides with the extrusion direction when each frame element is extruded. In the case of the vertical frame 15, the direction along the vertical direction is the longitudinal direction, as indicated by the arrow B in FIG. 1.

  A frame element (hereinafter referred to as an outer frame element 15A) disposed on the outdoor side is an extruded shape formed by a metal material such as an aluminum alloy, and has a substantially uniform cross section over the entire length in the longitudinal direction. It is. The outer frame element 15A includes an outer frame base portion 15Aa, left and right outer heat insulating material accommodation portions 15Ab, and a support fin portion 15Ac.

  The outer frame base portion 15Aa has a cylindrical shape with a rectangular cross section having two finding walls 15Aa1 and 15Aa2 along the finding direction and two prospecting walls 15Aa3 and 15Aa4 along the prospecting direction.

  The left and right outer heat insulating material accommodating portions 15Ab are concave groove-shaped portions provided on the outer surface of the finding wall 15Aa2 located on the indoor side in the outer frame base portion 15Aa. Each of the outer heat insulating material accommodating portions 15Ab opens toward the indoor side, and extends along the longitudinal direction of the outer frame base portion 15Aa at both side edges of the finding wall 15Aa2.

  As is clear from FIG. 3, guide ribs 15 </ b> Ab <b> 1 are provided at portions of the wall portions constituting the outer heat insulating material accommodation portion 15 </ b> Ab that face each other. The guide ribs 15Ab1 project in a direction facing each other in a state where a gap is secured between the guide ribs 15Ab1 and the finding wall 15Aa2.

  The support fin portion 15Ac is a thin plate-like portion projecting along the direction of finding from the prospective surface facing the sub-opening 10Ab in the outer frame base portion 15Aa, and holds the window tight material AT1 at the projecting end portion of the surface facing the indoor side. doing. The window tight material AT1 is an elastic member interposed between the support fin portion 15Ac and the glass panel 30, and is molded so as to be in close contact with the surface of the glass panel 30.

  The frame element (hereinafter referred to as the inner frame element 15B) arranged on the indoor side is made of a metal material such as an aluminum alloy so as to have a substantially uniform cross section over the entire length in the longitudinal direction, like the outer frame element 15A. It is a molded extruded shape. The inner frame element 15B includes an inner frame base portion 15Ba, left and right inner heat insulating material accommodation portions 15Bb, a door-end fin portion 15Bc, and a pressing edge mounting portion 15Bd.

  The inner frame base portion 15Ba has an inner finding wall 15Ba1 having the same finding dimensions as the outer frame base portion 15Aa, and left and right inner sides extending in parallel from both ends of the inner finding wall 15Ba1 toward the indoor side. It has prospective walls 15Ba2 and 15Ba3. A lid member 15E that covers the indoor opening is detachably mounted between the left and right inner prospective walls 15Ba2 and 15Ba3 in the inner frame base portion 15Ba.

  The left and right inner heat insulating material accommodating portions 15Bb are concave groove-shaped portions provided in a portion facing the outer heat insulating material accommodating portion 15Ab of the outer frame element 15A in the inner finding wall 15Ba1 of the inner frame base portion 15Ba. . Each of the inner heat insulating material accommodating portions 15Bb is opened toward the outdoor side, and extends along the longitudinal direction of the inner frame base portion 15Ba.

  As is clear from FIG. 3, guide ribs 15Bb1 are provided in the opposing portions of the wall portions constituting the inner heat insulating material accommodation portion 15Bb. The guide ribs 15Bb1 protrude in directions facing each other in a state where a gap is secured between the guide ribs 15Bb1 and the inner finding wall 15Ba1.

  The door fin portion 15Bc protrudes along the direction of finding from the prospective surface facing the main opening 10Aa in the inner frame base portion 15Ba, and holds the door tight material AT2 at the projecting end portion of the surface facing the outdoor side. Yes. When the door panel 20 is closed, the door tight material AT2 is in contact with the surface of the door panel 20 facing the indoor side, and is used to ensure airtightness between the door panel 20 and the vertical frame 15, and is an elastic member. It is molded by.

  The pressing edge mounting portion 15Bd is for detachably mounting the pressing edge 16. In the first embodiment, the edge mounting portion 15Bd is configured by providing the edge engaging piece 15Bd1 and the edge supporting piece 15Bd2 on the prospective surface facing the sub-opening 10Ab in the inner frame base 15Ba. The pressing edge engaging piece 15Bd1 is a thin plate-like portion protruding along the direction of finding from the edge located on the outdoor side of the prospective surface facing the sub-opening 10Ab of the inner frame base 15Ba. An engagement receiving portion 15Bd1a is provided at the protruding end of the pressing edge engaging piece 15Bd1. The pressing edge support piece 15Bd2 is a thin plate-like portion that protrudes along the direction of finding from a portion on the indoor side of the pressing edge engaging piece 15Bd1 on the prospective surface facing the sub-opening 10Ab of the inner frame base portion 15Ba. A protruding edge portion of the pressing edge support piece 15Bd2 is provided with a pressing edge support surface 15Bd2a along the prospective direction.

  The pressing edge 16 is an extruded shape member formed of a metal material such as an aluminum alloy, like the frame elements 15A and 15B. In the first embodiment, the pressing edge 16 having a pressing base 16a having a flat plate shape, a pressing fin portion 16b and an engagement piece 16c extending from the pressing base 16a is applied. The ledge base portion 16a comes into contact with the ledge support surface 15Bd2a of the ledge support piece 15Bd2 via one surface. The ledge fin portion 16b is a flat plate portion bent at a right angle from one side edge portion of the ledge base portion 16a to the other surface side. A ledge tight material AT3 is bonded to the bent end of the ledge fin portion 16b. The ledge tight material AT3 is an elastic member interposed between the ledge fin portion 16b and the glass panel 30, and is formed so as to be in close contact with the surface of the glass panel 30. The engaging piece portion 16c is a flat plate-like portion protruding from one surface of the pressing base portion 16a, and has an engaging portion 16d at the extended end portion.

  In order to attach the pressing edge 16 to the inner frame element 15B, first, the engaging piece portion 16c is inserted between the pressing edge engaging piece 15Bd1 and the pressing edge support piece 15Bd2 of the inner frame element 15B. Thereafter, when the ledge base portion 16a is brought into contact with the ledge support surface 15Bd2a, the ledge 16 is brought into a state in which the engaging portion 16d of the engaging piece portion 16c is engaged with the engaging receiving portion 15Bd1a of the ledge engaging piece 15Bd1. . At this time, the ledge fin portion 16b of the ledge 16 is disposed in a state of facing the support fin portion 15Ac of the outer frame element 15A, and the face material accommodating groove portion 15F is formed between the support fin portion 15Ac and the support fin portion 15Ac. Accordingly, if the peripheral edge portion of the glass panel 30 is arranged in the face material accommodating groove portion 15F, the tight materials AT1 and AT3 are interposed between the support fin portion 15Ac of the outer frame element 15A and the press fin portion 16b of the presser edge 16, respectively. Thus, the glass panel 30 is sandwiched.

  The heat insulating material 15C connecting the outer frame element 15A and the inner frame element 15B is made of a resin having a lower thermal conductivity than that of the aluminum alloy. The individual heat insulating material 15C is interposed at a portion extending over the entire length between the two frame elements 15A and 15B so as to maintain a non-contact state with each other. As the heat insulating material 15C, a preformed material may be applied, or a liquid material having plasticity may be injected into each of the heat insulating material housing portions 15Ab and 15Bb.

  Further, the vertical frame 15 is provided with an expansion member 40 in a hollow portion 15D surrounded by two frame elements 15A and 15B and two heat insulating materials 15C. The expansion member 40 is a cylindrical member formed of a resin including a thermally expandable member, and has the same longitudinal dimension as that of the vertical frame 15. The thermally expandable member included in the expansion member 40 is a nonflammable or flame retardant member that expands when heated, and is, for example, a foam material containing thermally expandable graphite. The temperature at which the thermally expandable member expands is preferably set to a temperature lower than the temperature at which the heat insulating material 15C melts. The expansion member 40 is provided with guide grooves 40a at two positions on the side surface. The guide groove 40a is a groove provided over the entire length along the longitudinal direction of the expansion member 40, and accommodates a guide rib 15Bb1 provided in the inner frame element 15B.

  According to the joinery including the standing frame 15 configured as described above, the outer frame element 15A and the inner frame element 15B are connected by the heat insulating material 15C in a non-contact state, so that the two frames Heat transfer between the elements 15A and 15B is suppressed, and there is an advantage that, for example, no condensation occurs in the inner frame element 15B and the lid member 15E.

  On the other hand, when a fire occurs outside and is heated, the heat insulating material 15C is melted, and the hollow portion 15D between the outer frame element 15A and the inner frame element 15B is exposed to the outside, There is a risk that it may be a through-hole communicating indoors and outdoors. However, according to the above-described vertical frame 15, the expansion member 40 is disposed in the hollow portion 15 </ b> D. Therefore, the thermally expandable member included in the expansion member 40 is heated before the heat insulating material 15 </ b> C is melted. It expands and fills the hollow portion 15D. Therefore, even if the heat insulating material 15C is melted, there is no fear that a through hole is formed in the vertical frame 15, which is advantageous in terms of fire resistance.

  In addition, since the expansion member 40 including the heat-expandable member may be inserted along the longitudinal direction from the end face of the vertical frame 15 into the hollow portion 15D, the heat-expandable member is attached to each of the frame elements 15A and 15B. There is no need, and there is no possibility that the manufacturing work of the vertical frame 15 will be complicated.

(Embodiment 2)
FIG. 4 shows a frame member of a joinery that is Embodiment 2 of the present invention. The frame member illustrated here is used as the standing frame 15 of the joinery similar to the first embodiment, and the form of the thermally expandable member whose expansion target is the hollow portion 15D is different from the first embodiment. Yes. Hereinafter, only portions different from those in the first embodiment will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and detailed descriptions thereof will be omitted.

  That is, in the second embodiment, instead of the expansion member 40 of the first embodiment, an insertion member 60 that holds a thermally expandable member 50 formed into a sheet shape on the surface is applied. The insertion member 60 is configured to have the same longitudinal dimension as that of the vertical frame 15 by molding a metal plate such as a steel material, and includes a substrate portion 60a and a support plate portion 60b. The substrate portion 60a is a flat plate portion having a slightly larger width than between the two guide ribs 15Ab1 formed on the outer frame element 15A. The support plate portion 60b is a flat plate-like portion erected in a direction perpendicular to the center of the substrate portion 60a. Thermally expandable members 50 are attached to both the front and back surfaces of the support plate portion 60b. The insertion member 60 is inserted into the hollow portion 15D from the end face of the vertical frame 15 with both side edges of the substrate portion 60a interposed between the finding wall 15Aa2 of the outer frame element 15A and the guide rib 15Ab1. is there.

  Also in the joinery including the vertical frame 15 of the second embodiment, since the outer frame element 15A and the inner frame element 15B are connected by the heat insulating material 15C in a non-contact state, the two frame elements 15A , 15B is suppressed, and there is an advantage that, for example, no condensation occurs in the inner frame element 15B and the lid member 15E.

  On the other hand, when a fire occurs outside and is heated, the thermally expandable member 50 disposed in the insertion member 60 expands and fills the hollow portion 15D before the heat insulating material 15C melts. . Therefore, even if the heat insulating material 15C is melted, there is no fear that a through hole is formed in the vertical frame 15, which is advantageous in terms of fire resistance.

  Moreover, since the insertion member 60 holding the thermally expandable member 50 may be inserted along the longitudinal direction from the end face of the vertical frame 15 into the hollow portion 15D, the thermally expandable member is attached to each of the frame elements 15A and 15B. There is no need to attach the vertical frame 15, and there is no risk of complicating the manufacturing work of the vertical frame 15.

(Embodiment 3)
FIG. 5 shows a frame member of a joinery that is Embodiment 3 of the present invention. The frame member illustrated here is used as the standing frame 15 of the joinery similar to the first embodiment, and the form of the thermally expandable member whose expansion target is the hollow portion 15D is different from the first embodiment. Yes. Hereinafter, only portions different from those in the first embodiment will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and detailed descriptions thereof will be omitted.

  That is, in the third embodiment, the expansion member 40 of the first embodiment is omitted, and the two-color molded member 70 is disposed over the heat insulating material accommodating portions 15Ab and 15Bb of the respective frame elements 15A and 15B. The two-color molded member 70 is formed by integrally molding a heat insulating material 71 and a heat-expandable member 72. The heat-expandable member 72 is opposed to the hollow portion 15D of the vertical frame 15 in the heat-insulating material accommodation portions 15Ab and 15Bb. The material 71 is disposed on the outer peripheral side of the vertical frame 15. The two-color molded member 70 has the same longitudinal dimension as that of the vertical frame 15 like the heat insulating material 15C of the first embodiment.

  In the joinery including the vertical frame 15 according to the third embodiment, the outer frame element 15A and the inner frame element 15B are connected to each other by the two-color molding member 70 in a non-contact state. Heat transfer between the elements 15A and 15B is suppressed, and there is an advantage that, for example, no condensation occurs in the inner frame element 15B and the lid member 15E.

  On the other hand, when a fire occurs outside and is heated, the thermally expandable member 72 of the two-color molded member 70 expands and fills the hollow portion 15D before the heat insulating material 71 melts. Therefore, even if the heat insulating material 71 is melted, there is no possibility that a through-hole is formed in the vertical frame 15, which is advantageous in terms of fire resistance.

  Moreover, since the pre-formed two-color molded member 70 may be disposed over the respective heat insulating material accommodating portions 15Ab and 15Bb, there is no need to attach a thermally expandable member to each of the frame elements 15A and 15B. There is no possibility of incurring a situation in which the 15 manufacturing operations become complicated.

(Embodiment 4)
FIG. 6 shows a frame member of a joinery that is Embodiment 4 of the present invention. The frame member illustrated here is used as the standing frame 15 of the joinery similar to the first embodiment, and the form of the thermally expandable member whose expansion target is the hollow portion 15D is different from the first embodiment. Yes. Hereinafter, only portions different from those in the first embodiment will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and detailed descriptions thereof will be omitted.

  That is, in the fourth embodiment, the expansion member 40 of the first embodiment is omitted, and it is necessary when injecting the liquid heat insulating material 15C into the heat insulating material accommodating portions 15Ab and 15Bb of the respective frame elements 15A and 15B. A thermally expandable member 81 formed into a sheet shape is attached to the sheet material 80. FIG. 7 shows a procedure for manufacturing the vertical frame 15 shown in FIG. Hereafter, the characteristic part of Embodiment 4 is demonstrated, referring FIG. 7 suitably.

  As shown in FIG. 7 (a), the vertical frame 15 of the fourth embodiment is formed by extrusion molding a profile 15AB in which the outer frame element 15A and the inner frame element 15B are integrated. . Specifically, the shape member 15AB having a shape in which the portions located inside each other in the heat insulating material accommodating portions 15Ab and 15Bb are connected to each other is formed. For this shape member 15AB, a liquid heat insulating material 15C is injected between any one of the heat insulating material accommodating portions 15Ab, 15Bb (left side in FIG. 7A), and is cured.

  After the heat insulating material 15C is hardened, as shown by a two-dot chain line in FIG. 7B, the cutting tool CT is inserted from the other empty heat insulating material accommodating portions 15Ab and 15Bb to divide the connecting portion. Then, the outer frame element 15A and the inner frame element 15B are separated from each other. However, the separated outer frame element 15A and inner frame element 15B are in a state of being connected by a cured heat insulating material 15C.

  Next, from this state, the sheet material 80 is attached to the empty heat insulating material accommodating portions 15Ab and 15Bb (on the right side in FIG. 7B) to block the entire length of the divided portion. In the sheet material 80 applied at this time, a thermally expandable member 81 is pasted over the entire length in a portion facing the hollow portion 15D of the vertical frame 15 in advance. Finally, as shown in FIG. 7C, when the liquid heat insulating material 15C is injected into the empty heat insulating material accommodating portions 15Ab and 15Bb and cured, the vertical frame 15 shown in FIG. It becomes.

  Also in the joinery including the vertical frame 15 of the fourth embodiment, since the outer frame element 15A and the inner frame element 15B are connected by the heat insulating material 15C in a non-contact state, the two frame elements 15A , 15B is suppressed, and there is an advantage that, for example, no condensation occurs in the inner frame element 15B and the lid member 15E.

  On the other hand, when a fire occurs outside and is heated, the thermally expandable member 81 attached to the sheet material 80 is expanded before the heat insulating material 15C is melted, and is filled in the hollow portion 15D. . Therefore, even if the heat insulating material 15C is melted, there is no fear that a through hole is formed in the vertical frame 15, which is advantageous in terms of fire resistance.

  In addition, since the sheet material 80 with the thermally expandable member 81 attached may be applied in the process of injecting and curing the heat insulating material 15C, it is not necessary to attach the thermally expandable member to each of the frame elements 15A and 15B. Further, there is no possibility that the manufacturing work of the vertical frame 15 will be complicated.

  In addition, in Embodiment 1- Embodiment 4 mentioned above, all demonstrated only the standing frame 15 of a frame, However, If it is a fitting provided with an invisible frame, it is also possible to apply to an invisible frame. is there. Moreover, although the joinery provided with the opening door and the FIX window is illustrated, the face material arrange | positioned in the opening divided into two by the vertical frame is not restricted to the combination of a door panel and a glass panel.

  15 side frame, 15A outer frame element, 15Ab outer heat insulating material accommodating portion, 15B inner frame element, 15Bb inner heat insulating material accommodating portion, 15C heat insulating material, 15D hollow portion, 40 expansion member, 50 thermal expansion member , 60 insert member, 70 two-color molded member, 71 heat insulating material, 72 thermally expandable member, 80 sheet material, 81 thermally expandable member

Claims (5)

Two frame elements are juxtaposed along the prospective direction without contact with each other, and a frame member is formed by connecting the two frame elements with a heat insulating material while forming a hollow portion therebetween. In the constructed joinery,
A joinery comprising a heat-expandable member that expands when heated so that the hollow portion becomes an expansion space.   The joinery according to claim 1, wherein the expansion member is formed of a material including the thermally expandable member, and the expansion member is inserted into the hollow portion along a longitudinal direction.   The joinery according to claim 1, wherein the thermally expandable member is held on a surface of the insertion member, and the insertion member is inserted into the hollow portion along a longitudinal direction.   The joinery according to claim 1, wherein the heat insulating material and the thermally expandable member are integrally formed so that at least a portion facing the hollow portion includes the thermally expandable member. The two frame elements each have a heat insulating material accommodating portion that accommodates the heat insulating material along the longitudinal direction on both sides of a portion facing each other, and the heat insulating material extends between the portions facing the heat insulating material accommodating portion. Are connected to each other by disposing
Between at least one of the mutually opposing portions of the heat insulating material accommodating portion, there is provided a sheet material that closes a gap between the heat insulating materials, and faces the hollow portion in the sheet material. The joinery according to claim 1, wherein the heat expandable member is provided on one surface, and the heat insulating material is provided on the other surface of the sheet material.

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