JPH11159015A - Joint material and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint material which can be easily executed without marring the appearance in a joint groove requiring sure watertightness between the adjacent wall face sheathing materials in a building. SOLUTION: Onto the surface of a synthetic resin joint joiner 4 positioned between wall face sheathing materials A, a joint base material 6 is integrally connected. The joint base material 6 is provided with left and right side plates 12, two flexible sealing tongue pieces 14a, 14b, which are protruded on the outside faces of the side plates 12 and brought into contact with the end faces of the wall face sheathing material via their tip parts, and multiple holes 16 bored between the sealing tongue pieces 14a, 14b, while a clearance between the side plates 12 is filled with a sealing material 8. A core material 10 pushed into between the side plates 12 in the joint base material 6 is formed when a core part 10A, which forcibly pushes out the sealing material 8 from the holes when it is pressed into between the side plates 12, is connected to a flange plate in a head part 10B covering the joint groove part. The core part 10A is short enough in length not to reach the bottom part of a sealing material filling area S3 between the side plates 12 when it is pushed in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material for constructing joint grooves where it is necessary to ensure watertightness between adjacent wall cladding materials in a building and a method of constructing the joint material.

[0002]

2. Description of the Related Art Conventionally, as a means for sealing joint grooves between adjacent wall covering materials A such as siding in a building, a hat-shaped joint joiner 50 as shown in FIG. 51 and the joiner 5
The sealing material 52 is filled in the joint groove formed by abutting the wall surface exterior material A on both side surfaces 50a of the 0 convex portion 50a, thereby improving the watertightness of the joint groove.

[0003] However, the conventional means for sealing joint grooves needs to be filled with the sealing material 52 after masking so that the sealing material does not adhere to the wall exterior material A at the time of construction. Not only is the construction troublesome, but it is necessary to perform the surface of the sealing material 52 as flat as possible so as not to impair the appearance. In addition, spots may occur when the sealing material is filled, and the sealing effect cannot always be enhanced.

[0004]

SUMMARY OF THE INVENTION The technical problem of the present invention is to easily construct a joint groove, which needs to ensure watertightness between adjacent wall cladding materials of a building, without impairing the appearance. An object of the present invention is to provide a joint material that can be used and a construction method thereof. Another technical problem of the present invention is that, when setting a predetermined joint groove between wall surface cladding materials using a joint jointer, the joint jointer itself has a structure for easily sealing the joint groove, so that masking and hand operation can be performed. An object of the present invention is to provide a joint material and a method for constructing the joint material, which can easily and reliably perform sealing without the necessity of filling a sealing material by work.

[0005]

In order to solve the above-mentioned problems, a first joint material of the present invention is a joint made of synthetic resin which is disposed on a lower ground surface of a building exterior and between wall exterior materials. A joint base material is integrally provided on the surface of the joiner, and the joint base material is protruded from left and right side plates and outer side surfaces of the side plates, and a tip constitutes an inner wall of the joint groove. At least two soft sealing tongue pieces in contact with the end face of the material, and a large number of holes formed between the sealing tongue pieces in the both side plates, and the pair of joint base materials has a pair of holes. A space surrounded by the sealing tongue and the inner wall of the joint groove is filled with a sufficient amount of sealing material to be pressed and filled and sealed, and a sealing material is provided at an opening between both side plates of the joint base material. The core material for covering the sealing member for suppressing the outflow and pushing between the side plates of the joint base material is as described above. The core part for pressing out the sealing material filled therein by the indentation between the plates from the hole of the side plate and the flange plate of the head covering the joint groove mouth part are connected in a substantially T-shaped cross-section. Wherein the core has a length that does not reach the bottom of the sealing material filling area between the side plates when the core is pressed.

The second jointing material of the present invention is a jointing material made of synthetic resin, which is disposed on the lower ground of a building exterior and between wall coverings, and is integrally formed with a jointing base material. The joint base material is continuously provided, and at least two soft seals projecting from left and right side plates and outer surfaces of the side plates, and having a tip contacting an end surface of a wall exterior material forming an inner wall of the joint groove. Tongue pieces, having a large number of holes perforated between the sealing tongue pieces in the both side plates, between the side plates of the joint base material,
A space surrounded by the pair of sealing tongue pieces and the inner wall of the joint groove is filled with a sufficient amount of a sealing material to be pressure-filled and sealed. The core material to be inserted between the side plates of the joint base material is inserted by inserting a lid for suppressing the flow of the sealing material and for suppressing the narrowing of the mouth between the both side plates, while pressing the lid between the side plates. By pressing the sealing material filled therein by pressing it into the side plate, the core part is pressed out from the hole of the side plate, and the flange plate of the head covering the joint groove mouth part is connected in a substantially T-shaped cross-section. The core is formed such that the tip of the lid does not reach the bottom of the sealing material filling area between the side plates when the core is pushed in.

In the joint material, the pair of seal tongues and the inner wall of the joint groove are inserted between the joint toyer and the seal tongue on the joint jointer side of the joint base material when the core is inserted between the side plates. It is appropriate to form a space into which the remainder of the sealing material that has been extruded into the space surrounded by and the outer surface of both side plates in the joint base material,
It is preferable to form a convex portion that sets the minimum width of the joint groove at the base of at least one set of sealing tongues at opposing positions on both side plates.

Further, the construction method of the present invention using the joint material includes a step of arranging the joint material with the joint material positioned between the wall covering materials on the lower ground surface of the building exterior; The core of the core material is pushed in between the side plates of the joint base material filled with, or the core portion of the core material is pushed in while pushing the lid inserted into the mouth between the both side plates of the joint base material, and the sealing is performed. The material is pressed out into a space surrounded by a pair of sealing tongue pieces protruding from the outer surface of the side plate through the hole of the side plate and the inner wall of the joint groove, and at the same time, the joint groove opening is formed by the flange plate of the core material head. And a step of covering

More specifically, the joint material and the method for constructing the joint material will be described below. When the joint material of the present invention is applied to a joint groove between adjacent wall facing materials in a building, first, a lower ground surface of the building exterior is used. Above, the joint joiner is disposed in a state where the joint base material is located between the wall covering materials. At this time, the sealing tongue is elastically closely contacted with the end face of the wall covering material so that no gap is formed between the wall covering material and the joint base material. In particular, when a convex portion is formed at the base of at least one set of sealing tongue pieces at opposing positions on both side plates of the joint base material, the minimum width of the joint groove of the wall covering material is set by the convex portion. Can be.

[0010] As described above, when the joint base is positioned between the wall covering materials and the joint joiner is provided, the seal tongue pieces protruding from the outer side surfaces of both side plates of the joint base are connected to the joint. Although it comes into pressure contact with the inner wall of the groove, the sealing material may flow out from the opening between the two plates due to the narrowing of the interval between the side plates due to the reaction force from the inner wall of the joint groove. Such a problem can be solved by increasing the strength of the bottom plate portions of both side plates in the joint joiner. However, by inserting a lid into the opening between the both side plates in the joint base material, the opening of the both side plates can be solved. The part can be prevented from being constricted.

Next, when the core portion of the core material is pushed between both side plates of the joint base material, the sealing material is pressed out from the holes formed in the side plates of the joint base material. The space surrounded by the tongue piece and the inner side wall of the joint groove is filled, and the remaining sealing material pushes and spreads the seal tongue piece on the joint joiner side of the side plate in the joint base material to form a joint between the joint joiner and the seal tongue piece. Since the sealing material flows into the space between the sealing materials, the sealing material does not protrude outside the joint material due to variations in the width of the joint groove.

That is, when the sealing tongue piece is pressed against the end face of the wall covering material, its upper surface side is in close contact with the inner side wall of the joint groove and is bent toward the joint jointer side.
Even if the extruded sealing material does not fit between the pair of sealing tongue pieces, the sealing material flows out of the space between the sealing tongue piece on the joint joiner side and the inner wall of the joint groove into the space on the joint joiner side. However, in the joint base material that is difficult to spread due to the curvature, there is no flow from the gap between the sealing tongue pieces on the mouth side of the both side plates and the inner wall of the joint groove to the outside of the wall cladding material. The material can be effectively used for sealing the joint groove, and it can sufficiently cope with variations in the width of the joint groove.

As described above, according to the present invention, the joint material can be easily installed in the joint groove where it is necessary to ensure the watertightness between the adjacent wall covering materials of the building without damaging the appearance. . Moreover, since the joint joiner itself has a structure for easily sealing the joint groove, it is possible to easily and reliably perform sealing without the necessity of masking or manually filling a sealing material. In addition, since an extra sealing material storage area is secured in response to variations in the width of the joint groove, the sealing material does not protrude outside the joint material due to the insertion of the core material. Therefore, an effective sealing effect between the joint groove and the inner wall can be obtained by effectively using the sealing material.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the joint material of the present invention will be described below in detail with reference to the drawings.
Shows a first embodiment of the joint material of the present invention. In FIG. 1, reference numeral 2 denotes a joint material for sealing joint grooves such as a joint portion of a building wall exterior material (siding or other exterior panel) A. The joint material 2 is an adjacent wall exterior material in a building. It is mainly intended for joint grooves that need to ensure water tightness between the materials A, and is roughly composed of an joint joiner 4 and an joint base material 6 integrated with the jointer 4, a sealing material 8, and a core material 10. ing.

As shown in FIG. 1, the jointer 4 is attached to a frame of a building via a waterproof sheet B, which is used as necessary, to attach a rim C of the lower ground of the exterior. It is arranged between the adjacent wall cladding materials A on the rim C and is fixed to the body rim C with nails D and the like together with the wall cladding material A so that the wall cladding materials A can be connected to each other. ing. As shown clearly in FIGS. 2 and 3, the joint base member 6 integrally connected to the surface of the joint joiner 4 includes left and right side plates 1 made of a relatively hard synthetic resin.
The base plates 2 and 12 are connected to the joint joiner 4 at their base ends and formed into a substantially U-shaped cross section.
A pair of sealing tongue pieces 14a, 14b integrally formed of a soft synthetic resin and projecting upwardly and downwardly from the outer side surface are inclined downward. Further, at the bases of the pair of sealing tongue pieces 14b, 14b at positions facing each other on the joint joiner 4 side in the joint base material 6, convex portions 14c, 14c for setting the minimum width of the joint groove are formed. I have.

A space between the two side plates 12, 12 is filled with a sealing material 8 having fluidity and viscosity, and the sealing tongues 14 on the both side plates 12 are filled.
a, 14b, between the two side plates 12, 12
Is pressed into the space S1 surrounded by the pair of sealing tongue pieces 14a, 14b and the inner wall W of the joint groove, the joint material 6 has a plurality of holes 16 formed therein. Are formed at equal intervals in the longitudinal direction and in a plurality of rows. In their adjacent hole rows, each hole 1
6 is located in the middle of two adjacent holes 16 in the adjacent row, and is arranged so as to have a slight overlap with the holes 16 in the adjacent row. As a result, the sealing material 8 is substantially uniformly extruded in the longitudinal direction of the joint base material 6.

Further, as shown in FIG. 1, between the sealing tongue piece 14b on the joint jointer 4 side of the joint base 6 and the joint joiner 4, there is an opening between both side plates 12 and 12 of the joint base 6. When the core material 10 is pushed into the portion 18, the sealing material 8 remaining in the space S1 surrounded by the pair of sealing tongue pieces 14a and 14b and the inner side wall W of the joint groove is related to the joint groove width. If there is, the remainder forms a space S2 into which the seal tongue piece 14a on the joint joiner 4 side is pushed and spread.

The sealing material 8 is pressed out into a space S1 surrounded by a pair of sealing tongues 14a, 14b and the inner wall W of the joint groove, that is, an appropriate amount corresponding to the case where the width of the joint groove is relatively large. Enough to be filled and sealed there,
The core material 10 is filled between the two side plates 12 and 12 of the joint base material 6 and is made of a rubber-based or synthetic resin-based elastomer such as butyl rubber or silicone resin. , 12 must be fluid and viscous enough to be pressed out of the hole 16 in the side plate 12.

A release sheet 20A for covering the holes 16 of both side plates 12, 12 is previously adhered to the joint base material 6 filled with the sealing material 8, and after the filling, the release sheet 20A of the joint base material 6 is removed. Portion 18 between both side plates 12 and 12 opening at the top
The release sheet 20B for suppressing the outflow of the sealing material 8
Is affixed. The release sheet 20A has a hole 1
When 6 is small and there is no risk of leakage of the sealing material,
It is not always necessary to stick it.

As shown in FIGS. 1 and 4, the core member 10 has a core portion 10A made of a relatively hard synthetic resin and a flange plate of a head portion 10B covering the joint groove opening portion. To form a substantially T-shaped cross section. The core 10A is
The joint base material 6 is formed in a plate shape having a thickness substantially equal to the width between both side plates 12, 12, and at a tip portion 10 a, the core member 10 is inserted between the side plates 12, 12 and a sealing material is formed. 8 is formed in a round shape to facilitate the flow, and formed to a length that does not reach the bottom of the sealing material filling area S3 between the side plates 12, and on both sides of the core 10A,
The sealing material 8 pressed out into the space S1 surrounded by the pair of sealing tongue pieces 14a, 14b and the inner wall W of the joint groove forms a sealing material filling area S3 between the tip of the core 10A and the side plate 12. And the bottom of the seal to maintain the integrity of the seal. The head 10B of the core member 10 is a flange plate made of a relatively soft synthetic resin that covers the joint groove mouth while the wing portions 10b are in frictional contact with the joint groove inner wall W.

Further, both side plates 1 of the joint base material 6 are formed.
The core 10A was pushed between the side plates 12 and 12 of the joint base material 6 at the edge portions of the inner surfaces of the core members 2 and 12 and the base end portions of both sides of the core 10A in the core material 10. At this time, engaging portions 22 and 24 that engage with each other are formed.

The joint material 2 and the method of applying the joint material 2 will be described in more detail. When the joint material 2 is applied between adjacent wall cladding materials A in a building, first, the two side plates 12 The release sheet 20A stuck on the outer surface of is released. Then, as shown in FIG. 1, a joint joiner 4 is disposed on a rim C attached to a building exterior via a waterproof sheet B with the joint base material 6 positioned between wall surface exterior materials A. I do. At this time, the sealing tongue pieces 14a and 14b are elastically in contact with the end surface of the wall covering material A so that a gap more than necessary is not generated between the wall covering material A and the joint base material 6. In this case, a pair of sealing tongue pieces 14b, 1 on both side plates 12 of the joint base material 6
The protrusions 14c, 14c formed at the base of 4b are for setting the minimum width of the joint groove formed by the end face of the wall covering material A, so that the end face of the wall covering material A is held at a position not in contact with the joint groove. It is desirable to do. In addition, a contact surface for setting the joint groove width by bringing the end face of the wall surface exterior material A into contact with the joint joiner 4 may be separately provided.

Next, when the core 10A of the core material 10 is pushed between the both side plates 12 of the joint base 6, the side plates 12 of the joint base 6 are pressed.
The sealing material 8 is pressed out from the hole 16 formed in the hole, and the sealing material 8 is filled in the space S1 surrounded by the pair of sealing tongue pieces 14a and 14b and the inner wall W of the joint groove. When there is a residue in the sealing material 8, the residue pushes and spreads the seal tongue piece 14b of the joint base material 6 on the joint plate 4 side of the side plate 12 to form a space S2 between the joint jointer 4 and the seal tongue plate 14b. Because of the inflow, the sealing material 8 does not protrude outside the joint material 2 due to the variation in the width of the joint groove. The core material 10 has a core 1
0A is the side plate 1 of the joint base material 6
It is pushed in until it engages with the engaging portions 22 of the second and the second portions 12, and is held at a predetermined pushing position by the engagement of the engaging portions 22 and 24.

That is, the sealing tongue pieces 14a, 14b
When pressing the end face of the wall covering material A, the upper surface thereof is in close contact with the inner wall W of the joint groove and is bent toward the joint joiner 4 side. Even if the sealing material 8 does not fit in the space S1 between the sealing tongues 14a and 14b, the sealing material 8 is moved from the space between the sealing tongue 14b on the jointing jointer 4 side and the inner wall W of the joint groove to the space S2 on the jointing joint 4 side. And flows out to the outer side of the wall covering material A from between the sealing tongue piece 14a on the mouth side of the both side plates 12 and the inner side wall W of the joint groove in the joint base material 6 which is difficult to spread due to bending. This is not the case, and the sealing material 8 can be effectively used for sealing the joint groove, and can sufficiently cope with variations in the width of the joint groove. When the amount of the sealing material flowing out of the space S1 is small, the sealing tongues 14a and 14b are inclined in advance in advance, and the sealing material is
It can also flow out between a and the flange plate of the core head 10B.

According to such a joint material, it is possible to easily construct a joint groove in which it is necessary to ensure watertightness between adjacent wall exterior materials A of a building without impairing the aesthetic appearance. Since the joint joiner 4 itself is integrally provided with the joint base material 6 filled with the sealing material 8 for easily sealing the joint groove, it is not necessary to fill the sealing material 8 by masking or manual work. Thus, reliable sealing can be easily performed. Further, since an extra area for accommodating the sealing material 8 is secured in accordance with the variation in the width of the joint groove, the sealing material 8 does not protrude outside the joint material 2 due to the insertion of the core material 10. By effectively using the sealing material 8 for sealing the joint groove,
An effective sealing effect with the inner wall W of the joint groove can be obtained.

Next, FIGS. 5 to 7 show a second embodiment of the present invention. As is clearly shown in FIG. 6, the joint material 2 of the second embodiment is obtained by inserting a lid 26 into the opening 18 between the both side plates 12 of the joint material 6 filled with the sealing material 8. Before the joint material 2 is applied, the lid 26 is formed with engaging portions 28 formed on both sides of the joint member 2 and a joint formed on the edge of the inner surface of both side plates 12 of the joint base material 6. The joint portion 22 is held at the opening 18 between the both side plates 12 of the joint base material 6 by engaging with each other. Then, the sealing material 8 is formed by the lid 26.
Is prevented from flowing out from the opening 18 between the both side plates 12 in the joint base material 6, and at the same time, the sealing material flows out because the both side plates are pushed inward and the opening between the both side plates is narrowed. And the press-in of the core material is prevented from being hindered. Note that a release sheet 20B for suppressing the outflow of the sealing material 8 can be preliminarily attached on the lid 26.

When the cover 26 is provided, the core 2
7 is the same as that of the first embodiment, but the core 27A of the core 27 has a length such that the tip of the lid 26 does not reach the bottom of the sealing material filling area between the side plates 12 when the core 27 is pushed in. A protrusion 27a is provided at the end of the core 27A to fit into the recess provided in the lid 26 to stabilize the connection between the two. The other constructions and operations of the joint material of the second embodiment are substantially the same as those of the first embodiment, and therefore, the same or corresponding portions are denoted by the same reference characters and description thereof will be omitted. Omitted. Also, this second
The joint material of the embodiment is constructed by pressing the lid 26 inserted between the both side plates 12 of the joint base material 6 filled with the sealing material 8 into the opening between the both side plates 12 while pressing the core 27 of the core material 27. Part 27
There is no difference from the construction method of the first embodiment except that A is inserted.

FIG. 8 shows a third embodiment of the present invention. As shown in FIG. 8, a joint material 32 of the third embodiment is connected to a joint 35 via a leg 35 standing on the surface of a joint joiner 34. The joint base material 36 is integrally formed. The joint base material 36 is for use when the wall covering material A is thick, and is different from that of the first embodiment except that the leg 35 and the sealing tongue piece 44 are provided on the leg 35. And composition, action,
There is no particular difference in the construction method. Therefore, the same or corresponding parts are denoted by the same reference characters and description thereof will be omitted.

The seal tongue piece 44 is provided for forming a space S2 between the seal tongue piece 14b and the joint jointer 34 in the first embodiment, and serves to prevent the escape of the sealing material flowing into the space S2. Preventing. Here, a case is shown in which the seal tongue piece 44 is provided with a convex portion 44c for setting the minimum width of the joint groove. Also in the third embodiment, the same lid 12 as in the second embodiment can be used as a sealing member for the opening 18 between the side plates 12 and 12.

[0030]

As described above, according to the present invention, a joint material can be easily installed in a joint groove where it is necessary to ensure watertightness between adjacent wall cladding materials of a building without impairing the appearance. In addition, the joint joiner itself has a structure to easily seal the joint groove, eliminating the need for masking and manual filling with a sealing material, thus enabling simple and reliable sealing. . Furthermore, since the area for storing extra sealing material is secured in response to variations in joint grooves, the sealing material does not protrude outside the joint material due to the insertion of the core material. To effectively use the sealing material
An effective sealing effect with the inner wall of the joint groove can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state after construction of a joint material according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a sealing material is filled in a joint base material integrally connected to the joint joiner.

FIG. 3 is a side view of the same.

FIG. 4 is a sectional view of a concentric material.

FIG. 5 is a cross-sectional view showing a state after construction of a joint material according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a state in which a sealing material is filled in a joint base material integrally connected to the joint jointer.

FIG. 7 is a sectional view of a concentric member.

FIG. 8 is a cross-sectional view showing a state after construction of a joint material according to a third embodiment of the present invention.

FIG. 9 is a sectional view of a conventional example.

[Explanation of symbols]

 2, 32 joint material 4, 34 joint jointer 6, 36 joint material 8 sealing material 10, 27 core material 10A, 27A core part 10B head 12 side plate 14a, 14b, 44 sealing tongue piece 14c, 44c convex part 16 hole 18 Mouth 26 Lid A Wall exterior material S1, S2 space S3 Sealing material filling area W Inner wall

Claims (6)

[Claims] 1. A joint base material is integrally connected to a surface of a synthetic resin jointer which is disposed on a lower ground surface of a building exterior between wall surface exterior materials, and wherein the joint base material is Left and right side plates, at least two soft sealing tongue pieces protruding from the outer surfaces of the side plates and having the tips in contact with the end surfaces of the wall covering material forming the inner wall of the joint groove, and those on the both side plates A plurality of holes perforated between the seal tongues, and between the side plates of the joint base material, the space surrounded by the pair of seal tongues and the inner wall of the joint groove is pressure-filled and filled. A sufficient amount of sealing material for sealing is filled, and a sealing member for suppressing the outflow of the sealing material is attached to an opening between both side plates of the joint base material, and is pushed between the side plates of the joint base material. The core material to be sealed is filled with the sealing material by pushing between the side plates. A core part extruded from the hole and a flange plate of the head covering the joint groove mouth part are formed by connecting them in a substantially T-shaped cross section, and the core part is a sealing material between the side plates at the time of its insertion. A joint material having a length that does not reach the bottom of the filling area. 2. A joint base material is integrally provided on a surface of a synthetic resin jointer which is disposed on a lower ground of a building exterior and between wall surface exterior materials. Left and right side plates, at least two soft sealing tongue pieces protruding from the outer surfaces of the side plates and having the tips in contact with the end surfaces of the wall covering material forming the inner wall of the joint groove, and those on the both side plates A plurality of holes perforated between the seal tongues, and between the side plates of the joint base material, the space surrounded by the pair of seal tongues and the inner wall of the joint groove is pressure-filled and filled. A lid is filled with a sufficient amount of sealing material for sealing, and at the mouth between both side plates of the joint base material, a lid body that suppresses leakage of the sealing material and suppresses narrowing of the mouth between both side plates is provided. The core material to be inserted and inserted between the side plates of the joint base material is pressed between the side plates while pressing the lid. A core section for extruding the sealant from the holes of the side plates is filled therein by pushing,
A flange plate of the head covering the joint groove mouth portion is formed by connecting them in a substantially T-shaped cross section, and the core portion is formed such that the tip of the lid body at the time of its insertion is formed at the bottom of the sealing material filling area between the side plates. A joint material having a length of less than. 3. The joint base member is surrounded by a pair of seal tongues and an inner side wall of the joint groove between the seal tongue on the joint jointer side and the joint joiner in the side plate of the joint base material when the core material is pushed between the side plates. 3. A space, into which the remainder of the sealing material extruded into the space, flows into.
Joint material described in. 4. A convex portion for setting the minimum width of the joint groove is formed at the base of at least one set of sealing tongues at the opposing positions of the both side plates on the outer side surfaces of the both side plates of the joint base material. The joint material according to claim 1 or 2, wherein: 5. A method for constructing a joint material according to claim 1, wherein the joint material is disposed between the wall covering materials on a lower ground surface of the building exterior. And a step of inserting a core portion of the core material between the side plates of the joint base material filled with the sealing material, and projecting the sealing material through a hole in the side plate to a pair of sealing tongue pieces and a joint groove protruding from the outer surface of the side plate. And a step of extruding into a space surrounded by the inner wall of the joint member and simultaneously covering the joint groove opening with a flange plate of the core member head. 6. A method for applying a joint material according to claim 2, wherein the joint material is disposed between the wall covering materials on the lower ground of the building exterior, and the joint joiner is provided. Process, between the two side plates of the joint material filled with the sealing material, while pushing the lid inserted into the mouth between the two side plates, pushing the core of the core material, the sealing material, the side plate Simultaneously pressing out the space surrounded by the pair of sealing tongue pieces protruding from the outer surface of the side plate through the hole and the inner side wall of the joint groove, and covering the joint groove opening with the flange plate of the core material head; A method for constructing a joint material, comprising: