JP3113617B2 - Joint waterproof structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint waterproof structure used for waterproofing joints such as outer walls of buildings such as houses, apartments and buildings.

[0002]

2. Description of the Related Art A joint of an outer wall of a building is filled with an elastic sealing material for ensuring waterproofness and airtightness. As such a joint waterproof structure, as shown in FIG. 6, an elastic sealing material 54, for example, a one-component modified silicone-based sealing material of a low modulus type, is conventionally provided in a joint 53 between outer wall materials 51, 51 by a wet method. Some are filled by the construction method.

[0003]

By the way, the elastic sealing material is required to be excellent in the ability to follow the deformation of the joint to the movement, and to be excellent in the adhesiveness to the outer wall material.
Various performances are required, for example, deformation such as constriction or blistering is unlikely to occur due to expansion and contraction of joints. However, at present, there is no elastic sealing material having all these performances.

[0004] For example, the low modulus type one-component modified silicone-based sealing material 54 described above is excellent in the ability to follow the deformation of the joint 53 to the movement, but is slightly inferior in the adhesiveness without the application of a primer. ,Also,
It has drawbacks such as the surface being constricted due to expansion and contraction of joints and blistering due to the mixture of air bubbles.

Therefore, the inventor of the present invention, as shown in FIG.
The inner side of the joint 3 between the outer wall materials 1 and 1 is filled with a low modulus type one-component modified silicone-based sealing material 4, and the high modulus type 1 sealing material is provided on the outlet side of the joint 3.
A joint waterproof structure in which the component-type modified silicone sealing material 5 is stacked and filled was considered. The high modulus type 5 has a relatively poor adhesion to the movement of the joints 3 with respect to the movement, but has relatively good adhesion without primer application.
Deformation such as constriction or swelling due to expansion and contraction of joints is unlikely to occur. Combine these two types of sealing materials 4 and 5,
By compensating one of the defects for the other, a high-performance joint waterproof structure can be realized.

However, in order to achieve high performance by laminating and filling the elastic sealing material in a plurality of layers in the joints 3, the thickness of the sealing materials 4 and 5 of each layer must be made appropriate. There is a problem that construction is very difficult in practice.

That is, in order to fill the joints 3 with the elastic sealing materials 4 and 5 in a plurality of layers as described above, the first sealing material 4 is injected into the joints 3 with a seal gun, and then the sealing material 4 is spatula. Press and spat off excess sealing material. Thereafter, the sealing material 5 later is similarly injected into the joint 3 with a seal gun, pressed in a spatula, and cut in a spatula.

However, in the first injection of the sealing material 4, the amount of the sealing material 4 to be injected may be too large or too small. In some cases, it is difficult to fill and seal the first sealing material 4 to an appropriate thickness even with a skilled technician. If the thickness of the first sealing material 4 is not appropriate, in the limited joint space, the thickness of the subsequent sealing material 5 is also not appropriate due to the filling thickness of the first sealing material 4. It can often happen that the expected high performance is not achieved.

[0009] Under the above-mentioned background, the present invention provides a joint capable of easily and efficiently laminating and filling a plurality of types of elastic sealing materials into appropriate joints, each having an appropriate thickness. It is an object to provide a waterproof structure.

[0010]

The above object is achieved at a predetermined intermediate depth position in a joint, in which a step surface facing an outlet side of the joint is formed in a longitudinal direction on at least one of opposing surfaces sandwiching the joint. The joint waterproofing structure is provided along the joint and a plurality of types of sealing materials are filled in the joint in the depth direction in a stacked state.

That is, in the preceding spatula cutting after the filling of the sealing material, the spatula is performed while the spatula is guided in contact with the step surface in the joint. Thereby, the thickness of the preceding sealing material becomes appropriate within the joint. Accordingly, the thickness of the sealing material injected and filled later is naturally also proper, and a plurality of types of sealing materials are stacked and filled to the proper thickness in the joint. In addition, the spatula is pushed and the spatula is cut while being guided on the step surface, so that the spatula and the spatula can be easily and efficiently performed.

Further, in the preceding sealing material injection operation, the step surface in the joint serves as a mark for the injection operator to make the injection amount of the sealing material appropriate, so that a large amount of the sealing material is unnecessarily injected. This helps prevent the sealing material from being injected in the proper amount while saving. Further, the stepped surface can be used as a guide for holding the tip of the seal gun at a predetermined constant depth position in the joint, so that the preceding sealing material can be stably and efficiently used in an appropriate amount. You can inject well.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

The joint waterproof structure shown in FIGS. 1 and 2 is a case where the joint waterproof structure is applied to a joint 3 of an outer wall material 1, 1 for a ceramic or the like used for a house or the like. With the joint 3 in between, both outer wall materials 1,
On the back side of 1, ground plywoods 10, 10 are arranged, and behind the joints 3, a backup material 11 made of urethane material or the like is arranged so as to be sandwiched between the ground plywoods 10, 10. The use of the backup material 11 made of a urethane material or the like is achieved by bonding the sealing material to both outer wall materials 1 and 2 on both sides,
This is because the sealing material can exhibit good deformation followability with respect to the movement of the joint 3. The joint 3 is filled with a low-modulus type one-component modified silicone-based sealing material 4 on the back side and a high-modulus type one-component modified silicone-based sealing material 5 on the outlet side in a stacked state. I have.

In order to realize high performance by expressing only a good part of the performance by combining the two elastic sealing materials 4 and 5, the thickness of each sealing material 4 and 5 must be set within the joint 3 respectively. Must be proper. Specifically, for example, each of the sealing materials 4 and 5 needs to have a thickness d1 and d2 of at least 6 mm in the joint 3 respectively.

In order to realize this reliably from the construction point of view,
At a predetermined intermediate depth position in the joint 3, the ridges 6, 6 having a rectangular cross section projecting into the joint 3 in the longitudinal direction so as to face both opposing surfaces of the outer wall materials 1, 1 sandwiching the joint 3. It is provided along. In these ridges 6, 6, the joint 3
The step surfaces 7 and 7 facing the exit side are the step surfaces according to the present invention. Filling work of both sealing materials 4 and 5
6 is performed.

That is, as shown in FIG. 3A, the two sealing materials 4 and 5 are first filled with the low modulus type one-component modified silicone-based sealing material 4 by the seal gun 13 into the joints 3. Is injected below the raised step surfaces 7 and 7 so as to rise slightly above the step surfaces 7 and 7. In this injection operation, the tip of the seal gun 13 is guided by the step surfaces 7 and 7 of the ridges 6 and 6 to hold the tip of the seal gun 13 at a predetermined constant depth position in the joint 3. You can go. After injection
As shown in FIG. 3B, this sealing material 4 is
At 4, the joint is pushed into the inside and the inner part of the joint 3 is filled without gaps. After filling, the extra sealing material 4 protruding above the step surfaces 7, 7 of the ridges 6, 6 is scraped off with a spatula 14. The spatula and the spatula are removed with a spatula 14
The sealing material 4 is moved from the depth position of the step surfaces 7, 7 of the ridges 6, 6 in the joint 3 by performing the sliding while making contact with the step surfaces 7, 7 of the ridges 6, 6. A proper thickness is filled over the lower part and properly filled. After a while
This time, as shown in FIG. 3C, a high modulus type one-component modified silicone-based sealing material 5 is injected into the joint 3 with the seal gun 13, and FIG.
As shown in (5), the injected sealing material 5 is spatally pressed with a spatula 14 to cut off the spatula. As described above, the two sealing materials 4 and 5 are filled in the joint 3 in a laminated state with an appropriate thickness, respectively, and the joint waterproof structure is formed.

In this waterproof structure, a low-modulus type one-component modified silicone-based sealing material 4 is provided deep inside the joint 3 and a high-modulus-type one-component modified silicone-based sealing material 5 is provided at the outlet side in the joint 3. Since each layer is filled in a proper thickness, deformation such as constriction or bulging due to expansion and contraction of joints, deterioration of leakage, and the like are less likely to occur, and high performance with excellent deformation followability can be exhibited.

Although the embodiment of the present invention has been described above, it goes without saying that the present invention can be variously modified without departing from the technical idea thereof. For example, the ridges 6 and 6 have a structure provided integrally with the outer wall materials 1 and 1, and an edge cover 15 made of metal or the like is attached to a peripheral portion of the outer wall material 1 as shown in FIG. The ridges are provided in various structural forms, such as a ridge 6 formed integrally with the edge cover 15 or a ridge (not shown) joined by welding or the like. Good. Further, as shown in FIG. 4B, the ridge 6 may be provided only on one of the outer wall materials 1 sandwiching the joint 3. Even with such a structure, a spatula or the like can be appropriately guided by the stepped surface 7 of the one ridge 6 in the spatula cutting or the like. Further, the stepped surface 7 is not limited to the structural form provided by the above-mentioned convex stripes 6, and for example, as shown in FIG.
As shown in (1), the step surface 7 may be formed in the joint 3 by forming the joint 3 into a structure in which the depth side is narrow and the exit side is wide.

In the above embodiment, the low modulus type one-component modified silicone-based sealing material 4 is provided at the back of the joint 3 and the high modulus type one-component modified silicone-based sealing material is provided at the outlet side of the joint 3. 5 is stacked and filled in two layers.
The low modulus type 4 may be stacked and filled in the joint 3 at the back side and the outlet side in the joint 3. Also,
The sealing materials 4 and 5 may be integrally joined to each other at the lamination interface, or may not be joined and integrated. Also, other types of sealing materials having different performances may be combined and stacked and filled. Further, three or more sealing materials may be combined and stacked and filled. In this case, it is possible to cope with this by adopting a structural form in which a plurality of step surfaces in the joint are provided in the depth direction with different amounts of protrusion into the joint.

The present invention can be applied not only to joints on outer walls of houses and the like, but also to waterproof structures for joints of various structures. Absent. Further, the structure in which a plurality of types of sealing materials are stacked and filled in the joint is not only used for the purpose of realizing high performance as described above, but may be used for various purposes. The present invention has a direct purpose of optimizing construction and ensuring easiness when filling a sealing material into a joint in a multi-layer structure, and realizing high performance is only a derivative effect thereof. It is.

[0022]

As described above, according to the joint waterproofing structure of the present invention, at a predetermined intermediate depth position in the joint, the step surface facing the outlet side of the joint has at least one of the opposing surfaces sandwiching the joint. Because it is provided on one side along the longitudinal direction,
This step surface can be used as a guide for a spatula in the case of cutting a previously filled sealing material, so that the thickness of the preceding sealing material can be made appropriate within the joint, and as a result, The thickness of the sealing material to be filled by filling can be made appropriate. Therefore, a plurality of types of sealing materials can be stacked and filled in the joint to an appropriate thickness. Moreover, by guiding the spatula to the step surface, the spatula pushing and the spatula cutting work can be performed easily and efficiently. In addition, in the preceding sealing material injection work, not only the step surface in the joint can be used as a mark for adjusting the injection amount of the sealing material to an appropriate amount, but also the tip of the seal gun can be used as a predetermined constant in the joint. It can also be used as a guide for holding the sealing material at the depth position, and it is possible to efficiently inject the sealing material without wasting the preceding injection amount of the sealing material.

Further, by providing the joint with the stepped surface in the joint as described above, the contact area between the sealing material and the outer wall material can be increased within a limited joint depth range, and thus the sealing material can be increased. And the outer wall material can be increased in adhesive strength.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a joint waterproofing structure, in which FIG. 1A is a perspective cross-sectional view and FIG. 1B is a transverse cross-sectional view.

FIG. 2 is a sectional perspective view showing a state before filling a sealing material.

FIGS. 3A to 3D are cross-sectional perspective views sequentially showing the order of filling a sealing material.

FIGS. 4A to 4C are perspective views showing a modification of the present invention.

FIG. 5 is a cross-sectional view of a joint waterproof structure on which the present invention is based.

FIG. 6 is a cross-sectional view showing a conventional example of a joint waterproof structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Exterior wall material 3 ... Joint 4 ... Sealing material 5 ... Sealing material 7 ... Step surface

Claims (2)

(57) [Claims] In the completed state after construction, a low modulus type elastic sealing material and a high modulus type elastic sealing material are arranged such that the low modulus type is located at the back side of the joint and the high modulus type is located at the exit side of the joint. Characterized in that the joints are filled in the joints in a stacked state in the above-mentioned arrangement relationship. 2. In a completed state after construction , at a predetermined intermediate depth position in the joint, a step surface facing the outlet side of the joint is formed along one or both of opposing surfaces sandwiching the joint in a longitudinal direction. In the arrangement relationship, the low modulus type elastic sealing material and the high modulus type elastic sealing material are such that the low modulus type is the deep side in the joint and the high modulus type is the outlet side in the joint, A joint waterproof structure characterized by being filled in a joint in a stacked state.