JP2015021370A - Joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure capable of maintaining such a state over a long period, by being put in a close contact state of an end surface of an outer wall panel and a dry type material in the whole joint, even when a groove width between the outer wall panels is varied.SOLUTION: The joint 10 comprises a wet type material 200 filled in the innermost side part among the inside of a groove GR formed between mutually adjacent two outer wall panels 100a and 100b and the dry type material 300 held inside the groove GR so as to cover the wet type material 200 from the outdoor side. Projection parts (first inclined planes 101a and 101b and second inclined planes 102a and 102b) projecting toward the inside of the groove GR are formed along the longitudinal direction of the groove GR on mutually opposed end surfaces of the respective outer wall panels 100a and 100b for partitioning the groove GR, and the dry type material 300 is held in a state of being sandwiched between the wet type material 200 and the second inclined planes 102a and 102b.

Description

  The present invention relates to a joint structure of an outer wall panel.

  In the outer wall having a configuration in which a plurality of outer wall panels are arranged, a joint is formed between adjacent outer wall panels. Such joints have a watertight structure because it is necessary to prevent water from entering the interior from between the outer wall panels. Specifically, for example, a polyurethane wet seal material is filled (placed) in a groove formed between adjacent outer wall panels.

  The wet sealant is in a state of being in close contact with the end face of each outer wall panel even after being cured, and maintains a certain degree of elasticity. For this reason, even when the groove width between the outer wall panels slightly changes due to an external force or the like acting on the building, the wet seal material is deformed so as to follow it. As a result, gaps between the outer wall panels and the wet sealing material are prevented from being damaged, and a watertight joint structure is maintained.

  However, the wet sealing material deteriorates with time, and its elasticity is gradually lost. That is, it becomes difficult to maintain a watertight joint structure due to aging of the wet sealant. Therefore, in order to maintain a watertight joint structure, it is necessary to periodically repair the joint.

  As a method for repairing the joint, for example, it may be possible to remove a deteriorated wet sealant with a cutter or the like and then re-place a new wet sealant at the same location. However, in such a method, a slight amount of old wet seal material remains on the end surface of the outer wall panel, and there is a possibility that the new wet seal material and the end surface of the outer wall panel are not closely adhered.

  For this reason, as another repair method, a method of placing a new wet seal material so as to cover the old wet seal material from the outdoor side while leaving the old wet seal material as it is without being removed has been proposed. (Patent Document 1 below).

  In Patent Document 1 below, a wet seal material is placed only in the inner part of the groove formed between the outer wall panels, and a fixed dry material is fitted and held in the outdoor part. A joint structure having a structure to be prepared is described. In addition, when the wet seal material has deteriorated over time, after removing only the dry material from the groove, a new wet seal material is placed to fill the portion of the groove occupied by the dry material. A method is described. As described above, the dry material fitted into the groove at the time of new construction of the building is to secure a “place for placing” a new wet seal material at the time of future repair. In addition, by filling the part of the groove between the outer wall panels on the outdoor side of the wet sealant until the time of refurbishment, the function of maintaining the appearance of the outer wall and the deterioration of the wet sealant are suppressed. It can also function.

JP 2012-46879 A

  By the way, it is difficult to make the width of the groove formed between the outer wall panels uniformly and strictly equal to the design value due to dimensional variations and assembly variations of the outer wall panels. That is, even immediately after building the building, there are cases where a part of the groove width is slightly wider or narrower than the design value.

  In the joint where the groove width is relatively wide, a gap is left in a part between the end face of the outer wall panel and the dry material, and there is a possibility that dirt such as dust accumulates in the gap. On the other hand, in a portion where the groove width is relatively narrow, the dry material may not be able to fit in the groove and may float. In either case, the aesthetic appearance of the outer wall is impaired, which is not preferable. Moreover, deterioration of the wet seal material may be promoted by water or dust entering from the gap between the end face of the outer wall panel and the dry material.

  Moreover, even if the gaps as described above do not occur immediately after building the building, the dry material itself deteriorates and deforms over time, so that there is a gap between the end surface of the outer wall panel and the dry material. It can happen.

  The present invention has been made in view of such a problem, and the purpose thereof is that even when the groove width between the outer wall panels varies, the end face of the outer wall panel and the dry material are in close contact with each other in the entire joint. It is an object of the present invention to provide a joint structure that can be maintained in a state in which the state is maintained and can maintain such a state over a long period of time.

  In order to solve the above-described problem, the joint structure according to the present invention is a joint structure of an outer wall panel, and is formed in a back side portion of a groove formed between two adjacent outer wall panels. End surfaces facing each other of each of the outer wall panels that divide the groove, comprising a wet material filled and a dry material held inside the groove so as to cover the wet material from the outdoor side In this case, a protrusion protruding toward the inside of the groove is continuously formed along the longitudinal direction of the groove, and the dry material is sandwiched between the wet material and the protrusion. It is characterized by being held in a rare state.

  The joint structure according to the present invention includes a wet material and a dry material inside a groove formed between two adjacent outer wall panels.

  The wet material is a sealing material that fills the inner portion of the groove, and seals between two adjacent outer wall panels in a watertight manner. The wet material is a highly viscous liquid when filling (growing) the groove, such as a polyurethane sealant, and is cured after being filled.

  The dry material is a fixed member made of synthetic rubber, for example. That is, it is a member that has been solid from the beginning when the joint is formed. The dry material is held inside the groove so as to cover the wet material filled as described above from the outdoor side. That is, in the inside of the groove formed between the outer wall panels, it is held in a portion on the outdoor side of the wet material. The wet material and the dry material are arranged inside the groove in a state where they are overlapped along the thickness direction of the outer wall panel.

  Protruding portions that protrude toward the inside of the groove are continuously formed along the longitudinal direction of the groove on the opposing end surfaces of the respective outer wall panels that define the groove. That is, the both side wall surfaces of the groove (end surfaces of the outer wall panels facing each other) are formed with protrusions that protrude from one to the other, and such protrusions are not interrupted along the longitudinal direction of the groove. Is formed.

  The dry material is held inside the groove while being sandwiched between the protruding portion and the wet material. That is, the back portion of the dry material is in contact with the wet material, and the outdoor portion of the dry material is in contact with the protrusion from the back side.

  When the joint is viewed from the outside (outdoor side) of the outer wall, the vicinity of both end portions in the width direction of the dry material is covered with the protruding portions. For this reason, even if the width of the groove formed between the outer wall panels varies depending on the location, the variation is covered by the overlapping width of the dry material and the protruding portion (of the dry material, covered by the protruding portion). It is absorbed by changing the area of the part. As a result, it is possible to suppress a gap from being formed in a part between the end face of the outer wall panel and the dry material, and to lift the dry material without being able to fit in the groove.

  Further, the dry material is pressed from the outdoor side to the back side (wet material side) by the protruding portion, and the close contact portion between the dry material and the protruding portion along the longitudinal direction of the groove. It is stretched continuously. As a result, the water-tight state between the dry material and the protrusion is maintained to some extent.

  As described above, according to the joint structure according to the present invention, even when the groove width between the outer wall panels varies, the end face of the outer wall panel and the dry material are in close contact with each other in the whole joint, And it becomes possible to maintain such a state over a long period of time.

  Further, in the joint structure according to the present invention, a protrusion that protrudes so that at least part of the dry material enters the wet material is formed on a surface of the dry material that contacts the wet material. It is also preferable that a space capable of accommodating the wet material pushed out by the protrusion is formed between the end surface and the dry material.

  In this preferred embodiment, the surface of the dry material that comes into contact with the wet material, that is, the back surface, is formed with a protrusion that protrudes so that at least a part thereof enters the wet material. For this reason, after placing the wet material in the groove, if the dry material is fitted into the groove before the wet material is cured, the protrusion of the dry material enters the uncured wet material. After that, when the wet material is cured, the dry material is in a state where the inner surface of the dry material is bonded, so that the dry material is firmly held and is prevented from coming off from the groove.

  In addition, when the dry material is fitted into the groove, a part of the uncured wet material is pushed out by the protrusion and protrudes from the original placement position (the space inside the groove). There is. However, in this preferred embodiment, a space capable of accommodating the wet material extruded by the protrusion is formed between the end surface of the outer wall panel (the side wall surface of the groove) and the dry material. For this reason, even when the wet material protrudes as described above, the wet material is accommodated in the space and does not protrude to the outdoor side from the dry material. As a result, the appearance of the joint is not impaired by the protruding wet material.

  Further, in the joint structure according to the present invention, the projecting portion includes a first inclined surface that is a surface on the outdoor side and a back side so that a shape of a cross section perpendicular to the longitudinal direction of the groove is a substantially mountain shape It is also preferable to have the 2nd inclined surface which is this surface.

  In this preferred embodiment, the protrusion formed on the end surface of the outer wall panel has a first inclined surface which is an outdoor side surface and a back surface so that the shape of the cross section perpendicular to the longitudinal direction of the groove is a substantially mountain shape. A second inclined surface which is a side surface.

  When the dry material is fitted into the groove, the dry material is guided by the respective first inclined surfaces formed on both sides of the groove, so that the dry material can be smoothly fitted. In addition, after the dry material is fitted into the groove, the dry material is pressed toward the back side by the respective second inclined surfaces formed on both sides of the groove. Since the second inclined surface is a surface inclined so that the normal direction thereof is toward the back side of the groove and toward the center of the dry material, the contact portion (contact surface) between the dry material and the second inclined surface is the groove. It is easy to form without interruption along the longitudinal direction. As a result, the space between the dry material and the protruding portion (second inclined surface) is further watertight, and the intrusion of water or dust is further suppressed.

  Further, in the joint structure according to the present invention, the outer wall panel is made of ALC, and a portion of the outer wall panel that faces the dry material held in the groove is in the recess on the surface of the ALC. It is also preferable that the material is covered with a coating film for preventing the material from entering.

  In this preferred embodiment, the outer wall panel is made of ALC (Autoclaved Light-weight Concrete). Moreover, the part which opposes the dry material of the state hold | maintained at the groove | channel among the outer wall panels is covered with the coating film for preventing a wet material from entering into the recessed part of the surface of ALC.

  Therefore, even if the dry material is inserted into the groove before the wet material is cured, and the uncured wet material adheres to a part of the outer wall panel (the portion facing the dry material), it is porous. It is possible to prevent the wet material from entering the concave portion on the surface of the outer wall panel which is in the form of quality. Since the wet material adheres to the smooth coating film, it can be easily removed.

  For example, when repairing joints, after removing the dry material, before placing a new wet material, easily remove the wet material attached to the portion of the outer wall panel where the dry material was fitted. Can be removed. That is, it is possible to easily remove the wet material adhering to the portion of the end face of the outer wall panel where the new wet material will be in close contact. As a result, the adhesion between the newly placed wet material and the end surface of the outer wall panel (the side wall surface of the groove) can be improved.

  According to the present invention, even when the groove width between the outer wall panels varies, the end face of the outer wall panel and the dry material can be in close contact with each other in the entire joint, and such The joint structure which can maintain a state over a long period of time can be provided.

It is sectional drawing which shows the joint structure which concerns on embodiment of this invention. It is a figure for demonstrating the procedure at the time of forming the joint shown in FIG. It is a figure for demonstrating the procedure at the time of forming the joint shown in FIG. It is sectional drawing which shows the shape of the dry material which is a part of joint joint shown in FIG. It is a figure for demonstrating the procedure at the time of repairing the joint shown in FIG. It is a figure for demonstrating the procedure at the time of repairing the joint shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 is a cross-sectional view showing a joint structure according to an embodiment of the present invention. The joint 10 is formed between adjacent outer wall panels 100a and 100b in a building formed by arranging a plurality of outer wall panels to form an outer wall. In FIG. 1, a cross section of the joint 10 cut along a horizontal plane is drawn, and a surface Sa that is an outer surface of the outer wall panel 100a and a surface Sb that is an outer surface of the outer wall panel 100b are both. It draws so that it may become upper. The cross-sectional shape of the joint 10 is substantially uniform regardless of the position of the cut surface.

  Each of the outer wall panels 100a and 100b is a plate-like member made of ALC (Autoclaved Light-weight Concrete), and each surface shape is rectangular. As shown in FIG. 1, the outer wall panels 100a and 100b are arranged such that the surface Sa and the surface Sb are located on substantially the same plane. The cross-sectional shapes of the outer wall panels 100a and 100b are symmetrical to each other at least in the vicinity of the joint 10 (the portion shown in FIG. 1). For this reason, in the following, detailed description is mainly given of the shape of the outer wall panel 100a, and description of the shape of the outer wall panel 100b may be omitted. Here, “left and right” refers to left and right when the joint 10 is viewed as shown in FIG.

  Each of the outer wall panels 100a and 100b is notched on the outdoor side, so that a groove GR is formed between them. The groove GR has a side wall surface and a bottom surface defined by a part of the end surface (the right end surface in FIG. 1) of the outer wall panel 100a and a part of the end surface (the left end surface in FIG. 1) of the outer wall panel 100b. Yes. The joint 10 has a configuration in which a wet material 200 and a dry material 300 are provided inside the groove GR. As will be apparent from the following description and FIG. 1 and the like, the “end face” here is not limited to a plane perpendicular to the surface Sa and the surface Sb.

  The end surface of the outer wall panel 100a has a first inclined surface 101a, a second inclined surface 102a, a first bottom surface 103a, a vertical surface 104a, a second bottom surface 105a, and a facing surface 106a.

  The first inclined surface 101a is a surface extending from the end of the surface Sa toward the back side of the groove GR (hereinafter also simply referred to as “back side”). The first inclined surface 101a is a surface inclined with respect to the surface Sa so that the normal direction thereof is a direction toward the outdoor side and the outer wall panel 100b (that is, an upper right direction in FIG. 1).

  The 2nd inclined surface 102a is a surface formed in the position which becomes the back | inner side rather than the 1st inclined surface 101a. The second inclined surface 102a is a surface inclined with respect to the surface Sa so that the normal direction thereof is the direction toward the back side and the outer wall panel 100b (that is, the lower right direction in FIG. 1). For this reason, in the cross section shown in FIG. 1, a part of the end surface of the outer wall panel 100a has a substantially chevron shape due to the first inclined surface 101a and the second inclined surface 102a.

  In the present embodiment, a minute vertical surface TSa (a surface perpendicular to the surface Sa) is formed between the first inclined surface 101a and the second inclined surface 102a. The vertical surface TSa corresponds to the apex of the portion of the end surface of the outer wall panel 100a that has a substantially chevron shape as described above.

  The first bottom surface 103a is a surface extending from the back end of the second inclined surface 102a toward the outer wall panel 100b. The first bottom surface 103a is parallel to the surface Sa.

  The vertical surface 104a is a surface extending from the end on the outer wall panel 100b side toward the back side in the first bottom surface 103a. The vertical surface 104a is perpendicular to the surface Sa and is formed on the same plane as the vertical surface TSa.

  The second bottom surface 105a is a surface extending from the back end of the vertical surface 104a toward the outer wall panel 100b. The second bottom surface 105a is parallel to the surface Sa.

  The facing surface 106a is a portion further to the back than the groove GR in the end surface of the outer wall panel 100a. The facing surface 106a extends from the end on the outer wall panel 100b side of the second bottom surface 105a toward the back side, and is perpendicular to the surface Sa. The facing surface 106a and the facing surface 106b of the outer wall panel 100b face each other in a state of being close to each other. A slight gap is formed between the facing surface 106a and the facing surface 106b.

  Of the inside of the groove GR, a portion defined by the vertical surface 104a, the vertical surface 104b, the second bottom surface 105a, and the second bottom surface 105b, that is, a portion of the inside of the groove GR that is behind the first bottom surface 103a. A wet material 200 is placed. The wet material 200 is a polyurethane-based sealing material, and is cured in a state of being in close contact (adhesion) with each of the vertical surface 104a, the vertical surface 104b, the second bottom surface 105a, and the second bottom surface 105b. For this reason, the joint 10 is watertightly closed by the wet material 200, so that water and dust do not enter between the outer wall panel 100a and the outer wall panel 100b.

  The dry material 300 is made of synthetic rubber formed in a string shape, and is disposed inside the groove GR with the longitudinal direction thereof being along the longitudinal direction of the groove GR. The dry material 300 is disposed in the groove GR at a position on the outdoor side of the wet material 200 and on the back side of the vertical surface TSa.

  As shown in FIG. 1, the dry material 300 is disposed so as to cover the wet material 200 from the outdoor side. In other words, the wet material 200 and the dry material 300 are arranged inside the groove GR in a state of being overlapped along the thickness direction (vertical direction in FIG. 1) of the outer wall panels 100a and 100b. The back portion of the dry material 300 is in close contact (adhesion) with the outdoor portion of the wet material 200.

  As already described, the end face on the joint 10 side of the outer wall panel 100a has a substantially chevron shape due to the first inclined face 101a and the second inclined face 102a. In other words, the vertical surface TSa corresponding to the apex of the substantially mountain-shaped portion protrudes toward the outer wall panel 100b side. Similarly, the end surface on the joint 10 side of the outer wall panel 100b has a substantially chevron shape due to the first inclined surface 101b and the second inclined surface 102b. In other words, the vertical surface TSb corresponding to the apex of the portion having a substantially chevron shape is shaped to protrude toward the outer wall panel 100a.

  The dry material 300 is held inside the groove GR while being sandwiched between the end surface protruding from both sides and the wet material 200 as described above. That is, the back portion of the dry material 300 is in contact with the wet material 200, and the portion of the dry material 300 on the outdoor side (the surface Sa side of the outer wall panel 100 a) is the second inclined surface 102 a and the second surface. It is in contact with the two inclined surfaces 102b from the back side.

  As shown in FIG. 1, the width of the dry material 300 (the dimension in the left-right direction in FIG. 1) is larger than the distance between the vertical surface TSa and the vertical surface TSb. For this reason, when the joint 10 is viewed from the outdoor side, the vicinity of both end portions in the width direction (the left-right direction in FIG. 1) of the dry material 300 are respectively the end surfaces of the outer wall panel 100a (the first inclined surface 101a and the first inclined surface 101a). Two inclined surfaces 102a) and end surfaces of the outer wall panel 100b (first inclined surface 101b, second inclined surface 102b).

  Therefore, even if the width of the groove GR varies depending on the location, the variation is caused by the overlapping width of the dry material 300 and the first inclined surface 101a or the like (the second inclined surface 102a of the dry material 300 or the like). It is absorbed by changing the area of the covered part). As a result, it is possible to suppress a gap from being formed in a part between the end surfaces of the outer wall panels 100a and 100b and the dry material 300, and to prevent the dry material 300 from being settled in the groove GR.

  Further, the dry material 300 is pressed from the outdoor side toward the wet material 200 side (downward in FIG. 1) by the second inclined surface 102a and the second inclined surface 102b. A close contact portion between the dry material 300 and the second inclined surface 102a and the like extends so as to continue along the longitudinal direction of the groove GR. As a result, the dry material 300 and the second inclined surface 102a and the like are maintained in a watertight state to some extent.

  As described above, in the joint 10 according to the present embodiment, even if the width of the groove GR formed between the outer wall panels 100a and 100b varies, the end faces of the outer wall panels 100a and 100b in the joint 10 as a whole. (The second inclined surface 102a, the second inclined surface 102b) and the dry material 300 are in close contact with each other. Moreover, it is possible to maintain such a state over a long period of time.

  Next, a method for forming the joint 10 will be described with reference to FIGS.

  First, as shown in FIG. 2, the outer wall panels 100a, 100b made of ALC are attached to a steel structure not shown to constitute the outer wall of the building. As already described, the adjacent outer wall panels 100a and 100b are arranged such that the surface Sa and the surface Sb are located on substantially the same plane. Further, the facing surface 106a and the facing surface 106b face each other with a slight gap therebetween. The distance between the outer wall panel 100a and the outer wall panel 100b (the distance between the facing surface 106a and the facing surface 106b) is narrower than a predetermined design value due to the respective dimensional errors and mounting errors to the steel structure building. There are cases where it is widened.

  Of the end surfaces of the outer wall panel 100a, the surfaces that define the groove GR, that is, the first inclined surface 101a, the vertical surface TSa, the second inclined surface 102a, the first bottom surface 103a, the vertical surface 104a, and the second bottom surface 105a, The whole is covered with one coating layer. This coating layer is formed in advance before the outer wall panel 100a is attached to the steel structure building. For example, the coating layer is formed by applying and drying a synthetic resin emulsion or a solution type synthetic resin. ing. Since ALC is a member having an infinite number of bubbles, its surface is generally not smooth but has a recess. However, the portion covered with the coating layer as described above has a relatively smooth surface because the concave portion is filled.

  The same applies to the end surface of the outer wall panel 100b, and the surfaces that define the groove GR, that is, the first inclined surface 101b, the vertical surface TSb, the second inclined surface 102b, the first bottom surface 103b, the vertical surface 104b, and the second bottom surface. 105b is in a state where all of them are covered with one coating layer. The reason why a part of the outer wall panels 100a and 100b is covered with the coating layer as described above will be described later.

  Subsequently, the wet material 200 is placed inside the groove GR using a sealing gun. When placing the wet material 200, in order to improve the adhesion (adhesiveness) between the wet material 200 and the vertical surface 104a or the like, the inner surface of the groove GR (from above the coating layer) in advance. It is desirable to apply a primer.

  FIG. 3 shows a state in which the wet material 200 is placed inside the groove GR. The wet material 200 is cast with a sealing gun and then shaped with a spatula, and the surface on the outdoor side is parallel to the surfaces Sa and Sb. As shown in FIG. 3, the surface of the wet material 200 on the outdoor side is located on substantially the same plane as the first bottom surfaces 103 a and 103 b. The wet material 200 is in close contact with each of the vertical surface 104a, the vertical surface 104b, the second bottom surface 105a, and the second bottom surface 105b.

  Subsequently, the dry material 300 is fitted into the groove GR to obtain the state shown in FIG. Specifically, the dry material 300 is first brought into contact with both the first inclined surface 101a and the first inclined surface 101b in a state where the longitudinal direction of the dry material 300 coincides with the longitudinal direction of the groove GR. . Thereafter, the dry material 300 is pressed from the outdoor side by a dedicated roller. The dry material 300 is guided toward the center and the back side of the groove GR by the first inclined surface 101a and the first inclined surface 101b.

  At this time, the dry material 300 is deformed by being restrained by the roller, and moves over the vertical surfaces TSa and TSb to the back side. Finally, the entire dry material 300 is accommodated in a space on the back side of the vertical surfaces TSa and TSb in the groove GR. The innermost portion of the dry material 300 is in close contact (adhesion) with the outdoor portion of the wet material 200. For this reason, after the wet material 200 is cured, the dry material 300 is firmly held inside the groove GR, and is prevented from being detached from the groove GR.

  Here, a specific shape of the dry material 300 will be described with reference to FIG. FIG. 4 is a cross-sectional view showing the shape of the dry material 300, and shows a cross section when the dry material 300 is cut along a plane perpendicular to the longitudinal direction thereof. As shown in FIG. 4, the cross-sectional shape of the dry material 300 is symmetrical. The “left and right” referred to here is the left and right when the dry material 300 is viewed as shown in FIGS. 1 and 4. In the following description, the direction from the dry material 300 to the outer wall panel 100a in the state of FIG. 1 may be referred to as “left direction”, and the direction from the dry material 300 to the outer wall panel 100b is referred to as “right direction”. May be referred to as.

  The dry material 300 has a first fin portion 310a extending in the left direction from the vicinity of the outdoor side end portion of the left side surface, and a first portion extending in the right direction from the vicinity of the outdoor side end portion in the right side surface thereof. And a fin portion 310b. As shown in FIG. 4, the entire surface of the dry material 300 on the outdoor side is a flat surface. Both the outdoor side surface of the first fin portion 310a and the outdoor side surface of the first fin portion 310b are disposed in the same plane as the flat surface.

  The dry material 300 further extends from the vicinity of the back end of the left side surface in the left direction toward the left direction, and from the vicinity of the back side of the right side surface thereof in the right direction. A second fin portion 320b.

  Because of this configuration, the left and right ends of the dry material 300 can be easily deformed when compressed. As a result, when the dry material 300 is fitted into the groove GR, both end portions can be deformed to smoothly get over the vertical surfaces TSa and TSb. That is, the operation of fitting the dry material 300 into the groove GR is easy.

  Further, the inclined surface 311a at the left end portion of the first fin portion 310a is inclined so that the normal direction thereof is directed to the upper left direction. For this reason, when the dry material 300 is fitted in the groove GR as shown in FIG. 1, the inclined surface 311a at the left end tends to be in close contact with the second inclined surface 102a. As a result, entry of water, dust, or the like toward the wet material 200 is suppressed.

  Similarly, the inclined surface 311b at the right end portion of the first fin portion 310b is inclined so that the normal direction thereof is directed to the upper right direction. For this reason, in the state where the dry material 300 is fitted into the groove GR as shown in FIG. 1, the inclined surface 311b at the right end tends to be in close contact with the second inclined surface 102b. As a result, entry of water, dust, or the like toward the wet material 200 is suppressed.

  The dry material 300 has a protrusion 330 formed at the center in the left-right direction on the inner surface. As shown in FIG. 4, the protrusion 330 protrudes further toward the back side than the second fin portions 320a and 320b.

  For this reason, when the dry material 300 is fitted in the groove GR, the protrusion 330 enters the uncured wet material 200. As a result, the contact area (adhesion area) between the dry material 300 and the wet material 200 increases, so that the dry material 300 is more firmly held after the wet material is cured.

  By the way, when the protrusion 330 enters the uncured wet material 200, a part of the uncured wet material 200 in the state shown in FIG. 3 is expanded by the protrusion 330. As a result, a part of the wet material 200 may protrude from the initial placement position and reach a portion on the outdoor side of the first bottom surface 103a.

  However, in the present embodiment, as shown in FIG. 1, a protrusion 330 is provided between the end surface (second inclined surfaces 102 a and 102 b) of the outer wall panel and the dry material 300 (second fin portions 320 a and 320 b). Spaces SPa and SPb that can accommodate the extruded wet material 200 are formed. In other words, the lengths along the left-right direction of the second fin portions 320a, 320b are adjusted so that such spaces SPa, SPb are formed.

  For this reason, even when the wet material 200 protrudes as described above, the wet material 200 is accommodated in the spaces SPa and SPb and does not protrude to the outdoor side from the dry material 300. As a result, the appearance of the joint 10 is prevented from being damaged by the protruding wet material 200.

  Next, a method for repairing the joint 10 when the wet material 200 has deteriorated over time will be described. When repairing the joint 10, first, only the dry material 300 is removed from the groove GR. Specifically, the dry material 300 is removed from the inside of the groove GR while peeling the inner surface of the dry material 300 from the wet material 200. FIG. 5 is a diagram for explaining a procedure when the joint 10 is repaired, and shows a cross section of the joint 10 in a state where the dry material 300 is removed as described above.

  After the dry material 300 is removed, the wet material 200 adhered and cured on the first bottom surfaces 103a and 103b and the second inclined surfaces 102a and 102b is removed. When the joint material 10 is formed, the wet material 200 is pushed out by the protrusions 330 of the dry material 300 and protrudes from the initial placement position (before the dry material 300 is fitted). . That is, it is cured while being accommodated in the spaces SPa and SPb.

  As described with reference to FIG. 2, the second inclined surfaces 102 a and 102 b and the first bottom surfaces 103 a and 103 b (surfaces of portions facing the dry material 300) are in a state of being covered with a coating layer in advance. ing. For this reason, since the wet material 200 adhered and cured as described above is in a state of being on a smooth coating film, it can be easily removed. In addition, in this embodiment, although the coating-film layer was formed in the whole surface which partitions off groove | channel GR among the end surfaces of outer wall panel 100a, 100b, as an embodiment of this invention, it is not restricted to such an aspect. For example, it is good also as an aspect which forms a coating-film layer only in 2nd inclined surface 102a, 102b, 1st bottom face 103a, 103b among the surfaces which divide the groove | channel GR, and does not form a coating-film layer in another part.

  After removing the dry material 300 and the wet material 200 adhering to the second inclined surface 102a and the like, a new wet material 400 is placed inside the groove GR. That is, a new wet material 400 is placed so as to fill the space occupied by the dry material 300 without removing the entire wet material 200 (deteriorated over time). The wet material 400 is a polyurethane-based sealing material made of the same material as the wet material 200.

  FIG. 6 is a view for explaining a procedure for repairing the joint 10, and shows a cross section of the joint 10 in a state where the wet material 400 is placed as described above. As shown in FIG. 6, the wet material 400 is in close contact with each of the second inclined surfaces 102a and 102b and the first bottom surfaces 103a and 103b. It is substantially equal to the position of the end portion on the outdoor side of the two inclined surfaces 102a and 102b.

  When the wet material 400 is cured in such a state, the repair of the joint 10 is completed. After the repair is completed, the joint 10 is watertightly closed by the wet material 400. As is clear from the above description, the dry material 300 that has been fitted into the groove GR when the joint 10 is formed is used to secure a “place for placing” the new wet material 400 at the time of future repairs. It can be said that it is a thing.

  Note that the amount of the wet material 400 to be cast at the time of renovation and the shape of the space in which the wet material 400 is cast (that is, the shape of the end surfaces of the outer wall panels 100a and 100b) are the service life of the wet material 400 (and Designed in consideration of the period until the next renovation.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

10: Joint 100a, 100b: Outer wall panel 101a, 101b: First inclined surface 102a, 102b: Second inclined surface 103a, 103b: First bottom surface 104a, 104b: Vertical surface 105a, 105b: Second bottom surface 106a, 106b: Opposing Surface 200: Wet material 300: Dry material 310a, 310b: First fin portion 311a: Inclined surface 311b: Left end inclined surface 320a, 320b: Second fin portion 330: Protrusion 400: Wet material GR: Groove Sa, Sb: surface SPa, SPb: space TSa, TSb: vertical surface

Claims (4)

The joint structure of the outer wall panel,
A wet material filled in a back portion of the inside of a groove formed between two adjacent outer wall panels; and
A dry material held inside the groove so as to cover the wet material from the outdoor side;
With
Protruding portions that protrude toward the inside of the groove are continuously formed along the longitudinal direction of the groove on the mutually opposing end surfaces of the outer wall panels that define the groove,
The dry material is
A joint structure characterized by being held in a state of being sandwiched between the wet material and the protrusion. On the surface of the dry material that comes into contact with the wet material, a protrusion that protrudes so that at least a part thereof enters the wet material is formed,
The joint structure according to claim 1, wherein a space capable of accommodating the wet material pushed out by the protrusion is formed between the end face of the outer wall panel and the dry material. The protrusion is
So that the shape of the cross section perpendicular to the longitudinal direction of the groove is substantially chevron,
The joint structure according to claim 1, wherein the joint structure has a first inclined surface that is an outdoor-side surface and a second inclined surface that is a back-side surface. The outer wall panel is made of ALC,
Of the outer wall panel, a portion facing the dry material held in the groove is covered with a coating film for preventing the wet material from entering a recess on the surface of the ALC. The joint structure according to any one of claims 1 to 3, wherein the joint structure is characterized.

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