JP7180322B2 - Waterproof structure of outer wall joint and construction method of waterproof member - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for outer wall joints and a method for constructing a waterproof member.

In Patent Document 1, in order to prevent water intrusion from the outer wall joints of the building, a primary water stop material is arranged on the outdoor side of the outer wall joint, and a secondary water stop material is arranged on the indoor side of the primary water stop material. A configuration is disclosed. This secondary water stop material is formed in a sheet shape and arranged between the frame supporting the outer wall and the skeleton (column) of the building. Further, in this prior art, fixing members (wood screws) for fixing the frame and the building skeleton (pillars) are driven into the building skeleton through the secondary waterproof material and the frame.

Japanese Unexamined Patent Application Publication No. 2004-108048

However, in the prior art described above, since the fixing member penetrates the secondary waterproof member, a pilot hole is formed in the secondary waterproof member through which the fixing member passes. For this reason, there is a possibility that water will enter through the pilot holes due to aged deterioration of the secondary waterproof member, etc., and there is room for improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waterproof structure for outer wall joints and a method for constructing waterproof members that can improve the water stopping performance of waterproof members for secondary water stopping of outer wall joints.

A waterproof structure for an outer wall joint according to a first aspect is a sheet that is disposed between an outer wall panel and a frame that supports the outer wall panel and that serves as a secondary water stop for the outer wall joint formed between the adjacent outer wall panels. a first waterproof member, a fixing screw that passes through the first waterproof member and fixes the frame to the building frame inside the outer wall joint, and a plate-like fixing screw that extends outward from the screw head of the fixing screw. An elastic member covering the screw head is arranged inside a recess formed in the center after assembly, and both ends are connected to the first waterproof member and the outer wall panel on both sides of the screw head. and a second waterproof member inserted into the gap of the

In the outer wall joint waterproof structure according to the first aspect, the sheet-like first waterproof member is arranged between the outer wall panel and the frame supporting the outer wall panel to provide secondary waterproofing to the outer wall joint. A plate-shaped second waterproof member is arranged on the outside of the screw head of the fixing screw penetrating the first waterproof member inside the outer wall joint. Here, after assembly, a recess is formed in the center of the second waterproof member, and both ends are inserted into the gap between the first waterproof member and the outer wall panel on both sides of the screw head. Inside the recess, the screw head is covered with an elastic member. As a result, the elastic member stops water between the screw head and the through hole of the first waterproof member, thereby improving the water stopping performance of the first waterproof member.

In the waterproof structure of the outer wall joint according to the second aspect, the first waterproof member is formed of an elastic body, and the inner side of the recess of the first waterproof member and the second waterproof member and the circumference of the screw head are provided. An elastic restoring force acts on each other between the elastic members arranged in the .

In the waterproof structure of the outer wall joint according to the second aspect, since an elastic restoring force acts between the first waterproof member formed of an elastic body and the elastic member of the second waterproof member, the first waterproof member and the elastic member The contact surface with becomes denser. This further improves the water stopping performance of the first waterproof member.

In the waterproof structure of the outer wall joint according to the third aspect, the second waterproof member is formed in a rectangular plate shape, and is made of a metal main body portion in which the recess is formed in the center after assembly, and the main body portion and is formed in the same shape as the main body, the center is adhered to the recess of the main body, and both ends are elastically deformed to be substantially accommodated inside the recess. and an elastic member.

In the waterproof structure of the outer wall joint according to the third aspect, the second waterproof member has a simple configuration in which the rectangular plate-shaped body portion and the elastic member formed in the same shape are arranged. According to this configuration, the second waterproof member adheres the center of the elastic member to the main body, and elastically deforms both ends that are not fixed to the main body toward the center. As a result, the elastic member is substantially accommodated inside the recess formed in the center of the main body after assembly. Thus, by forming the second waterproof member with a simple configuration, it is possible to improve the water stopping performance of the first waterproof member while suppressing construction costs.

A waterproof member construction method according to a fourth aspect is a waterproof member construction method applied to the waterproof structure of the outer wall joint according to any one of the first aspect to the third aspect, 2. One end of the waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint passes through a gap between one of the outer wall panels constituting the outer wall joint and the screw head, and is connected to the first waterproof member. A first step inserted into a gap between one of the outer wall panels, and the other end portion of the second waterproof member on the other side in a direction substantially orthogonal to the extending direction of the outer wall joint constitutes the outer wall joint. and a second step of inserting the waterproof member into a gap between the first waterproof member and the other outer wall panel through the gap between the outer wall panel and the screw head.

In the construction method of the waterproof member according to the fourth aspect, in the gap between each outer wall panel and the screw head which are arranged adjacently and constitute the outer wall joint, substantially orthogonal to the extending direction of the outer wall joint in the second waterproof member The second waterproof member is assembled by inserting both end portions in the direction to the right. As a result, the second waterproof member can be assembled in a simple manner using the existing construction of the outer wall joint.

In the construction method of the waterproof member according to the fifth aspect, in the first step and the second step, both ends of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint are formed with the outer wall panel. Both ends of the elastic member inserted between the first waterproof member and disposed on the indoor side surface of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint are connected to the outer wall panel and the It is characterized in that it is elastically deformed by the frictional force generated between it and the first waterproof member without being inserted between it and the first waterproof member, and is substantially accommodated inside the recess of the second waterproof member. .

In the waterproof member construction method according to the fifth aspect, both ends of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint are formed by the first step and the second step described in the fourth aspect. It is inserted between the outer wall panel and the first waterproof member. At this time, both ends of the elastic member disposed on the indoor side surface of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint are not inserted between the outer wall panel and the first waterproof member, It is elastically deformed by the frictional force generated between it and the first waterproof member, and is substantially accommodated inside the concave portion of the second waterproof member. In this way, it is possible to cover the screw head with the elastic member in a simple manner by utilizing the frictional force between the sheet-like first waterproof member and the elastic member arranged on the indoor side surface of the second waterproof member. . As a result, it is possible to improve the waterproof performance of the first waterproof member while reducing the work load at the construction site.

As described above, according to the waterproof structure of the outer wall joint according to the first aspect, the elastic member stops water between the screw head and the through hole of the first waterproof member, and the water stopping performance of the first waterproof member It has an excellent effect of being able to improve the

According to the waterproof structure of the outer wall joint according to the second aspect, the elastic restoring force acting between the elastic members of the first waterproof member and the second waterproof member further closes the gap between the first waterproof member and the elastic member. It has an excellent effect that the water stopping performance of the first waterproof member can be further improved.

According to the waterproof structure of the outer wall joint according to the third aspect, the second waterproof member is formed and constructed by a simple configuration in which the main body portion and the elastic member formed in the same rectangular plate shape are arranged to face each other. It has an excellent effect that the water stopping performance of the first waterproof member can be improved while suppressing the cost.

According to the construction method of the waterproof member according to the fourth aspect, there is an excellent effect that the second waterproof member can be assembled by a simple method using the existing structure in which the fixing screw is attached inside the joint of the outer wall. play.

According to the waterproof member construction method according to the fifth aspect, the first waterproof member can be stopped by a simple method using the frictional force generated between the sheet-like first waterproof member and the second waterproof portion. It has an excellent effect of being able to improve water performance.

(A) to (C) show the main part of the waterproof structure of the outer wall joint according to the first embodiment, and are process diagrams showing the work process when attaching the second waterproof member to the outer wall joint. It is a plane sectional view which shows the state before assembly|attachment of the 2nd waterproof member which concerns on 1st Embodiment. 5 is an enlarged cross-sectional view showing a state cut along line 3-3 of FIG. 4; FIG. 1 is an overall perspective view showing a building to which a waterproof structure for outer wall joints according to a first embodiment is applied; FIG. It is an explanatory view for explaining a phenomenon that water intrusion occurs from the joint of the outer wall. It is process drawing corresponding to FIG. 1 which shows the principal part of the waterproof structure of the outer wall joint which concerns on 2nd Embodiment.

[First Embodiment]
A first embodiment of a waterproof structure for outer wall joints according to the present invention will be described below with reference to FIGS. 1 to 5. FIG.

The waterproof structure of the outer wall joint of this embodiment is applied to the external corner portion 16A of the inner balcony 28 formed on the second floor of the building 10 . First, the building 10 will be explained.

As shown in FIG. 4, the building 10 is a so-called unit building. After installing a plurality of lower floor side (first floor portion 14) building units 18 on the foundation 12, the building 10 is constructed by installing a plurality of upper floor side (second floor portion 16) on the lower floor side building units 18. is constructed by installing the building unit 20 of Each building unit 18, 20 includes four pillars 22, a rectangular frame-shaped ceiling beam 24 joined to the upper end of each pillar 22, and a rectangular frame-shaped ceiling beam 24 joined to the lower end of each pillar 22. The floor girders 26 form a building frame.

An inner balcony 28 is provided on the front side of the second floor portion 16 of the building 10.例文帳に追加The inner balcony 28 is formed inside the building unit 20 that constitutes the second floor. Specifically, a substantially rectangular opening 30 formed in one side (the front side of the building 10) facing the longitudinal direction of the building unit 20, and side walls arranged on both sides in the width direction of the opening 30. 32 and a hanging wall 34 arranged on the upper side of the opening 30 in the height direction. A lower half of the opening 30 is covered with a handrail 36. - 特許庁With the above configuration, the side wall portion 32 of the inner balcony 28 has a structure that protrudes to the outside with respect to the doorway 37 that communicates the living room space of the building 10 and the inner balcony 28, and the external corner portion 16A in the second floor portion 16. constitutes

FIG. 3 shows a cross-sectional view of the side wall portion 32 of the inner balcony 28 taken along line 3-3 in FIG. As shown in this figure, from the middle part in the height direction to the lower end of the side wall part 32, on the design surface of the end part on the outdoor side, there are an outer corner panel 40 and an inner corner panel so as to surround the pillar 22 of the building unit 20. Exterior wall panels 38 consisting of 42 are arranged. The outer corner panel 40 is erected in the height direction of the building 10 and is angled by a right side wall 40A arranged parallel to the right side 22A of the pillar 22 and an outer front wall 40B arranged parallel to the front 22B of the pillar 22. formed in the shape of

The inner corner panel 42 is erected in the height direction of the building 10, and includes a left wall 42A arranged parallel to the left side 22C of the pillar 22 and an inner front wall 42B arranged parallel to the front 22B of the pillar 22. It is formed in an angle shape by

Thus, at the outdoor end of the side wall 32, the outer wall joint 44 extending in the height direction of the building is formed at the portion where the outer corner panel 40 and the inner corner panel 42 are adjacent to each other in the lateral direction. The waterproof structure of the outer wall joint 44 will be described in detail below.

As indicated by the two-dot chain line in FIG. 3, an outer wall joint formed by the outer corner panel 40 and the hanging wall 34 is formed on the upper end side of the side wall portion 32 on the building front side of the pillar 22.

As shown in FIG. 3 , a primary water stop portion 46 is provided on the outdoor side of the outer wall joint 44 , and a secondary water stop portion 48 is provided on the indoor side of the outer wall joint 44 . The primary water stop portion 46 is composed of an elongated gasket 47 made of an elastic material (rubber such as EPDM in this embodiment).

On the other hand, the secondary water stop portion 48 is provided between the outer wall panel 38 and the frame 50 that supports the outer wall panel 38 . The frame 50 includes an outer frame 52 that supports the outer corner panel 40 from the indoor side, an inner frame 54 that supports the inner corner panel 42 from the indoor side, and covers the joint between the outer frame 52 and the inner frame 54 from the indoor side. a splice position frame 56;

The outer frame 52 is made of sheet metal, extends in the height direction of the building 10, and is fastened to the outer corner panel 40 by fastening members (not shown). Also, the outer frame 52 is formed in an angle shape corresponding to the corners of the outer corner panel 40 . Specifically, the outer frame 52 includes a right side portion 52A arranged parallel to the right side wall 40A of the outer corner panel 40, and an outer front portion 52B arranged parallel to the outer front wall 40B. The horizontal dimension of the outer front surface portion 52B is set longer than the horizontal dimension of the outer front wall 40B. Therefore, the outer front surface portion 52B is arranged so as to cover the outer wall joint 44 from the indoor side.

The inner frame 54 is formed of sheet metal, extends in the height direction of the building 10, and is fastened to the inner corner panel 42 by fastening members (not shown). Also, the inner frame 54 is formed in an angle shape corresponding to the corners of the inner corner panel 42 . Specifically, the inner frame 54 has a left side portion 54A arranged parallel to the left side wall 42A of the inside corner panel 42 and an inner front portion 54B arranged parallel to the inner front wall 42B. The horizontal dimension of the inner front surface portion 54B is set shorter than the horizontal dimension of the inner front wall 42B.

With the above configuration, when the outer frame 52 and the inner frame 54 are assembled, the frame joint 58 between the outer frame 52 and the inner frame 54 is arranged on the indoor side of the inner front wall 42B of the inner corner panel 42 . A silicone resin-based adhesive 60 (for example, PM100 or the like) is applied to the frame joint 58 .

The splicing position frame 56 is made of an elongated sheet metal and extends in the height direction of the building 10 . The joint position frame 56 is fastened to the inner corner panel 42 by a fastening member (not shown), is arranged on the indoor side of the outer frame 52 and the inner frame 54, and covers the outer wall joint 44 and the frame joint 58 from the indoor side. are arranged as Thus, on the indoor side of the outer wall joint 44, the outer frame 52 supporting the outer corner panel 40 and the joint position frame 56 supporting the inner corner panel 42 are overlapped.

In addition, a plurality of pilot holes (reference numerals omitted) are formed along the outer wall joint 44 in the front face 22B of the column 22, the outer frame 52, and the joint position frame 56, and are arranged coaxially. A tapping screw 62 as a fixing screw is attached to the prepared hole from the outside of the outer wall panel 38 to fix the outer wall panel 38 to the pillar 22 . A plywood 64 having a predetermined thickness is appropriately arranged between the frame 50 (indoor side of the joint position frame 56) and the pillar 22, and the plywood 64 is fastened together with the frame 50 and fixed to the pillar 22. By doing so, the fixing portion of the tapping screw 62 is reinforced.

On the other hand, the secondary water stop portion 48 is composed of a waterproof sheet 66 provided between the outer wall panel 38 and the frame 50, and a screw head waterproof member 68 that covers the screw head 62A of the tapping screw 62 from the outside. ing. The waterproof sheet 66 corresponds to the "first waterproof member" in the present invention, and the screw head waterproof member 68 corresponds to the "second waterproof member".

The waterproof sheet 66 is a long sheet material extending in the height direction of the building 10, and is made of an elastic material (rubber such as EPDM in this embodiment), for example. The waterproof sheet 66 is provided between the outer wall panel 38 and the frame 50 so as to cover the outer wall joint 44 from the indoor side, and is fixed to the pillar 22 together with the frame 50 and the plywood 64 by the tapping screws 62 described above. . Thereby, the gap between the outer wall panel 38 and the frame 50 is watertight.

The screw head waterproof member 68 is composed of a main body portion 70 formed of a steel plate and an elastic member 72 formed of a plate-like butyl rubber. Here, FIG. 2 shows a horizontal cross section of the screw head waterproof member 68 before being assembled to the outer wall joint 44 . FIG. 1(C) shows a horizontal cross-section of the screw head waterproof member 68 after being attached to the outer wall joint 44 .

As shown in FIG. 2, the screw head waterproof member 68 is composed of a flat plate-like main body portion 70 and a flat plate-like elastic member 72 arranged in parallel on the indoor side of the main body portion 70 before being attached. ing. The body portion 70 and the elastic member 72 have substantially the same size and shape, and are formed in a substantially rectangular plate shape. The main body portion 70 and the elastic member 72 are arranged with their longitudinal direction substantially perpendicular to the extending direction of the outer wall joint 44 in a front view. It is preferable that the longitudinal dimension L of the body portion 70 and the elastic member 72 is set to about 20.0 mm. Further, the plate thickness t1 of the body portion 70 is preferably set to about 0.35 mm, and the plate thickness t2 of the elastic member 72 is preferably set to about 0.50 mm to 1.0 mm.

The elastic member 72 has a central portion 72A in the longitudinal direction adhered to the main body portion 70 by an adhesive layer 73, and both longitudinal end portions 72B are not fixed to the main body portion 70. As shown in FIG. The horizontal dimension t3 of the adhesive layer 73 is preferably set to about 10.0 mm, and the horizontal dimension t4 of the end portion 72B is preferably set to about 5.0 mm. .

The mounting of the screw head waterproof member 68 is performed in the following manner. First, each member to be arranged across the outer wall joint 44 is preliminarily fixed to the pillar 22 of the building unit 20 at the factory and carried to the site. Specifically, the outer corner panel 40, the outer frame 52, the joint position frame 56, the plywood 64, and the waterproof sheet 66 are fixed to the column 22 in advance. Next, an adhesive 60 is applied to the edge of the outer frame 52 , and the edge of the inner frame 54 to which the inner corner panel 42 is fixed is arranged along the adhesive 60 to form a frame joint 58 . After that, the inner corner panel 42 and the joint position frame 56 are fixed to form the outer wall joint 44 .

Next, as shown in FIG. 1A, the screw head waterproof member 68 is oriented such that its main body portion 70 is arranged on the outdoor side, and one end in the longitudinal direction is connected to the screw head 62A and the outer corner panel 40. facing the gap 74 (first step). At this time, one end portion 70A of the main body portion 70 made of a steel plate having high rigidity with respect to the elastic member 72 is inserted between the outer corner panel 40 and the waterproof sheet 66 . On the other hand, the end portion 72B of the elastic member 72 stays on the screw head 62A side while elastically deforming due to the frictional force generated between the elastic member 72 and the waterproof sheet 66 (see FIG. 1(B)).

Next, in a similar manner, the other longitudinal end of the screw head waterproof member 68 faces the gap 74 between the screw head 62A and the inner corner panel 42 (second step). As a result, the other end portion 70B of the main body portion 70 is inserted between the inner corner panel 42 and the waterproof sheet 66, as shown in FIG. 1(C). A substantially U-shaped concave portion 76 that is open to the indoor side in a plan view is formed in the central portion of the main body portion 70 . Then, the recess 76 is inserted inside the outer wall joint 44 . At this stage, the elastic member 72 is accommodated inside the recess 76 together with the screw head 62A, with the ends 72B on both sides in the longitudinal direction remaining on the screw head 62A side. As a result, the screw head 62A is covered with the elastic member from the outside.

(action/effect)
Next, the operation and effects of this embodiment will be described.
As shown in FIG. 5, when a waterproof sheet 66 is provided between the outer wall panel 38 and the frame 50, the tapping screws 62 pass through the waterproof sheet 66 at the locations where the tapping screws 62 are attached. Therefore, if the gasket 47 is damaged due to deterioration over time, rainwater 78 enters from the outer wall joint 44 and passes through the prepared hole (reference numeral omitted) of the waterproof sheet 66 to enter the room. In addition, in FIG. 5, the symbol "80" indicates the rainwater that has entered the indoor side through the waterproof sheet.

However, in the waterproof structure of the outer wall joint according to the present embodiment, the screw head waterproof member 68 that covers the screw head 62A of the tapping screw 62 is arranged on the outdoor side. Specifically, the body portion 70 constituting the screw head waterproof member 68 has one end portion 70A and the other end portion 70B in the longitudinal direction inserted between the outer wall panel 38 and the waterproof sheet 66 on both left and right sides of the screw head 62A. there is After the screw head waterproof member 68 is assembled in this manner, a recess 76 is formed in the central portion of the main body 70 and protrudes to the outside, and the recess 76 is inserted inside the outer wall joint 44 . An elastic member 72 is accommodated inside the recess 76 to cover the screw head 62A from the outside. As a result, the elastic member 72 seals off water between the screw head 62A and the pilot hole (reference numerals omitted) of the waterproof sheet 66, thereby preventing water from entering from the outer wall joint 44. FIG.

Further, in this embodiment, the waterproof sheet 66 and the elastic member 72 of the screw-head waterproof member 68 are made of an elastic material. Moreover, since the elastic member 72 is elastically deformed by the frictional force generated between the waterproof sheet 66 and the elastic member 72 , an elastic restoring force acts between the waterproof sheet 66 and the elastic member 72 . Therefore, the contact surface between the waterproof sheet 66 and the elastic member 72 becomes more dense due to the mutual elastic restoring force, and the waterproof performance of the waterproof sheet 66 can be further improved.

Further, in the present embodiment, the screw head waterproof member 68 has a simple configuration in which a rectangular plate-like body portion 70 and an elastic member 72 having the same dimensions are arranged side by side, and the central portion in the longitudinal direction is adhesively fixed. It is said that Therefore, it is possible to suppress the infiltration of water from the outer wall joint 44 while suppressing the construction cost.

Further, according to this embodiment, the screw head waterproof member 68 has one longitudinal end thereof inserted into the gap 74 between the outer corner panel 40 and the screw head 62A. Next, the assembly is completed by inserting the other longitudinal end of the screw head waterproof member 68 into the gap between the inner corner panel 42 and the screw head 62A. In this manner, the screw head waterproof member 68 can be assembled in a simple manner using the existing configuration in which the fixing screw 62 is attached inside the outer wall joint 44 .

Furthermore, according to the present embodiment, by inserting both longitudinal ends of the screw head waterproof member 68 into the gap 74 between the screw head 62A and the outer wall panel 38, the longitudinal ends 70A and 70B of the main body 70 are obtained. is inserted between the exterior wall panel 38 and the tarpaulin 66 . At this time, both ends 72A and 72B in the longitudinal direction of the elastic member 72 disposed on the indoor side surface of the screw head waterproof member 68 are not inserted between the outer wall panel 38 and the waterproof sheet 66, It is elastically deformed by the frictional force generated in the body portion 70 and accommodated inside the concave portion 76 of the main body portion 70 . In this way, by utilizing the frictional force between the waterproof sheet 66 and the elastic member 72 of the screw head waterproof member 68, the screw head 62A can be covered with the elastic member 72 in a simple manner. As a result, the waterproofing performance of the waterproof sheet 66 can be improved while reducing the work load at the construction site.

[Second embodiment]
A second embodiment of the waterproof structure for outer wall joints according to the present invention will be described below with reference to FIG. In addition, about the same component part as 1st Embodiment mentioned above, the same number is attached and the description is abbreviate|omitted.

As shown in FIGS. 6A to 6C, in the waterproof structure of the outer wall joint according to the second embodiment, a pair of projections 86 are provided on the outdoor side surface of the main body portion 84 of the screw head waterproof member 82. It is characterized by the fact that The pair of protrusions 86 are provided at the center of the main body 84 in the longitudinal direction with a gap therebetween, and overlap the gaps 74 between the outer wall panels 38 provided on the left and right sides of the screw head 62A when viewed from the front. are placed in The protrusion 86 is formed in a substantially triangular shape that protrudes toward the outside in a cross-sectional view along the horizontal direction of the body portion 84 and is formed continuously along the height direction of the body portion 84 . Note that the protrusions 86 may be formed discontinuously (for example, in a broken line shape) along the height direction of the main body portion 84 .

(action/effect)
Since the screw head waterproof member 82 having the above configuration basically follows the configuration of the screw head waterproof member 68 of the first embodiment, it is possible to obtain the same functions and effects. Further, in this embodiment, as will be described below, the member can be easily positioned when the screw head waterproof member 82 is attached.

When installing the screw head waterproof member 82 of the present embodiment, first, each member to be arranged across the outer wall joint 44 is preliminarily attached to the pillar 22 of the building unit 20 in the same manner as in the first embodiment described above. , and then transported to the site. Specifically, the outer corner panel 40, the outer frame 52, the joint position frame 56, the plywood 64, and the waterproof sheet 66 are fixed to the column 22 in advance.

Next, as shown in FIG. 6(A), one end of the screw head waterproof member 82 faces the gap 74 between the outer corner panel 40 and the screw head 62A, and a pair of projections 86 provided on the body portion 84 are mounted. One end portion 84A of the main body portion 84 is inserted to a position where it is locked on one side of the . After that, as shown in FIGS. 6B and 6C, when the inner corner panel 42 is assembled adjacent to the outer corner panel 40, the inner corner panel 42 is assembled with the projection 86 on the other side as a reference. , and the inner corner panel 42 can be attached so as to cover the other end portion 84B of the main body portion 84 from the outside.

As described above, in this embodiment, the assembly positions of the outer corner panel 40 and the inner corner panel 42 that are adjacent to each other can be determined based on the pair of protrusions 86 of the main body portion 84. Easier assembly work. The screw head waterproof member 82 can also be attached in the same manner as the screw head waterproof member 68 of the first embodiment.

[supplementary explanation]
In each of the above embodiments, the body portions 70, 84 of the screw head waterproof members 68, 82 are made of steel plate, but they may be made of other metal materials or resin materials. In other words, it may be made of a material having higher rigidity than the elastic member 72 .

Further, in each of the above embodiments, the elastic members 72 of the screw head waterproof members 68 and 82 are configured to be made of butyl rubber. good.

Moreover, although the waterproof structure of the outer wall joint of each of the above embodiments is applied to the exterior corner 16A of the inner balcony 28, it is not limited to this, and may be applied to the exterior corner of an alcove or a garage.

In addition, the waterproof structure of the outer wall joint of each of the above embodiments is not limited to the external corner 16A of the building 10, and may be applied to the internal corner of the building and the external wall joint formed on the outer wall arranged on the plane. .

In each of the above-described embodiments, the frame 50 that supports the outer wall panel 38 is fixed to the pillar 22 of the building unit 20, but the present invention is not limited to this, and the frame 50 is not limited to the ceiling girders 24 or the floor girders 26. may be fixed to Moreover, the waterproof structure of the outer wall joints of each of the above-described embodiments may be applied not only to unit buildings but also to buildings constructed by the steel framework construction method.

10 Building (unit building)
16A external corner 38 outer wall panel 44 outer wall joint 50 frame 62 tapping screw (fixing screw)
62A screw head 66 waterproof sheet (first waterproof member)
68 screw head waterproof member (second waterproof member)
70 body portion 72 elastic member 76 concave portion 82 screw head waterproof member (second waterproof member)
84 main body

Claims (5)

a sheet-like first waterproof member disposed between an outer wall panel and a frame supporting the outer wall panel and for secondary waterproofing of an outer wall joint formed between adjacent outer wall panels;
a fixing screw that penetrates the first waterproof member inside the outer wall joint and fixes the frame to the building frame;
An elastic member covering the screw head is arranged inside a concave portion formed in the center of the plate-shaped fixing screw and arranged outside the head of the fixing screw after assembly, and both ends of the screw are a second waterproof member inserted into a gap between the first waterproof member and the outer wall panel on both sides of the head;
Waterproof structure of outer wall joints. The first waterproof member is formed of an elastic body,
An elastic restoring force acts on each other between the first waterproof member and an elastic member arranged inside the recess of the second waterproof member and around the screw head,
The waterproof structure of the outer wall joint according to claim 1. The second waterproof member is
a metal main body formed in a rectangular plate shape and having the recess formed in the center after assembly;
It is arranged on the indoor side of the main body and is formed in the same shape as the main body. and the elastic member is
The waterproof structure of the outer wall joint according to claim 1 or 2, comprising: A waterproof member construction method applied to the waterproof structure of the outer wall joint according to any one of claims 1 to 3,
One end of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint passes through the gap between one of the outer wall panels constituting the outer wall joint and the screw head, and the first waterproof member passes through the gap between the screw head. a first step of inserting into a gap between the member and one of the outer wall panels;
The end of the second waterproof member on the other side in the direction substantially orthogonal to the extending direction of the outer wall joint passes through the gap between the other outer wall panel constituting the outer wall joint and the screw head, and the first waterproof member a second step of inserting into the gap between the member and the other outer wall panel;
Construction method of the waterproof member including. Through the first step and the second step, both ends of the second waterproof member in a direction substantially perpendicular to the extending direction of the outer wall joint are inserted between the outer wall panel and the first waterproof member, and Both ends of the elastic member disposed on the indoor side surface of the second waterproof member in a direction substantially orthogonal to the extending direction of the outer wall joint are not inserted between the outer wall panel and the first waterproof member. It is elastically deformed by the frictional force generated between it and the first waterproof member, and is substantially accommodated inside the recess of the second waterproof member ,
The construction method of the waterproof member according to claim 4 .

Images