JP2012046884A - Panel joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel joint structure which eliminates an additional maintenance of a side face of a groove during repair of a panel, such as, to remove a shaped material from the groove at a connecting part of the panels and instead to fill the groove with a new unshaped sealant.SOLUTION: A joint structure comprises a concave groove 2 at a connecting part of two panels 1, an unshaped sealant 3 placed in the groove 2 adjacent to a bottom face 2a, and a shaped material 4 which is mounted in the groove 2 adjacent to a surface. A primer coating layer 5 is previously formed across from a surface of the panel 1 to a bottom face 2a of the groove 2 prior to placing of the unshaped sealant. After the shaped material 4 is mounted in the groove 2, a top coat film 6 is formed across from the surface of the panel 1 to a surface of the shaped material 4.

Description

  The present invention relates to a joint structure of a panel. More specifically, the present invention relates to an improvement in a joint structure of a panel on an outer wall or the like of a building.

  In order to make the joints between the outer wall panels of the building have a water-tight structure, it has been practiced to place an irregular sealing material on the joints or to load a fixed material called a regular sealing material or a gasket. There is also a joint structure in which a fixed material having a waterproof performance or a fixed material having no waterproof performance loaded with an amorphous seal material is combined with a fixed material.

  A new building is constructed using an outer wall panel that has a joint structure with a combination of such an irregular sealing material and a fixed shape material, and is made of ALC and coated on the surface and joints in advance. To do so, attach the outer wall panel, place the irregular sealing material in the joint groove and load the irregular shaped material, and then apply the coating from the outer wall panel surface to the irregular sealing material or the irregular shaped material surface. Generally, this is not performed (see, for example, Patent Document 1).

JP 2006-283509 A

  However, the sealing effect of the shaped material is not perfect, and a gap is generated at the boundary between the side surface of the groove and the shaped material due to shrinkage or hardening of the shaped material over time, and moisture or outside air enters through the gap. There is a possibility that the side surface of the groove in the connection portion (joint portion) of the panel is contaminated and the deterioration of the coating film proceeds. Therefore, as described in Patent Document 1, when the joint portion is repaired (when the service life of the irregular sealing material has elapsed), only the regular material is removed without removing the irregular sealing material, and the space formed at this time If a new irregular sealing material is used instead of a regular material, it will be necessary to care for the side of the groove due to the progress of deterioration of the coating film, such as removal of the deteriorated coating film and attached dirt. It might be.

  Therefore, the present invention eliminates the need for additional work such as cleaning the side surfaces of the grooves when the panel is refurbished such that the shaped material is removed from the grooves at the connecting portion of the panel and filled with a new amorphous sealing material instead. An object of the present invention is to provide a joint structure for such a panel.

  In order to solve this problem, the present inventor has examined the joint structure. As described above, the sealing effect of the shaped material is not perfect, and moisture and outside air that may enter between the shaped material and the groove side surface of the panel connecting portion may cause contamination. When carrying out such contamination care at the time of panel repair, especially if the groove is narrow or deep, care work is required and the confirmation work is not easy. The present inventor who further examined these points has come to obtain new knowledge that leads to the solution of the problem.

  The joint structure of the panel according to the present invention is based on such knowledge, a groove formed in a concave shape in the connecting portion of the two panels, and an irregular sealing material placed on the bottom side of the groove, And a shaped material loaded on the surface side of the groove, and before the non-standard sealing material is applied from the surface of the panel to the bottom surface of the groove, a primer coating layer is formed in advance, and the shaped material is loaded into the groove. Then, an overcoating film is formed by overcoating from the surface of the panel to the surface of the shaped material.

  In the joint structure according to the present invention, it is possible to protect the portion of the side surface of the groove that is in contact with the shaped material on the side surface of the groove at least before the amorphous sealing material is applied. According to this, a new amorphous sealing material is filled at the time of panel repair (for example, when removing the shaped material from the groove of the panel connecting portion and filling with a new irregular sealing material). Deterioration of the groove side surface and adhesion of foreign matter at the part (the part that was loaded with the fixed form material until the time of refurbishment and filled with a new amorphous sealing material instead of this) Therefore, it is not necessary to form a new undercoat layer under the state after the panel is connected. For this reason, when repairing the panel, there is no need to perform work such as cleaning the groove side surfaces.

  Further, in such a joint structure of the panel, it is preferable that the panel is made of ALC, and an undercoat coating layer is formed in advance from the surface of the ALC to the bottom surface of the groove. In this case, foreign matter such as mud and oil is difficult to adhere to the groove, and even if it is attached, it is easy to clean, so that deterioration of the groove side surface and foreign matter can be suppressed.

  According to the present invention, when the panel is repaired such that the shaped material is removed from the groove in the connecting portion of the panel and is filled with a new amorphous sealing material instead, there is no need to separately perform operations such as cleaning the side surfaces of the groove. .

It is a figure which shows an example of the outer wall panel in which the undercoat coating-film layer was formed in the predetermined range before the amorphous sealing material is constructed. It is a figure which shows the joint structure in which the coating-film layer was formed in the range from the surface of an outer wall panel to the bottom face of a groove | channel. It is a figure which shows the joint structure by which the irregular-shaped sealing material was laid in the groove | channel. It is a figure which shows the joint structure where the fixed form material was loaded into the groove | channel.

  Hereinafter, an example of a preferred embodiment of the present invention will be described with reference to the drawings.

  1 to 4 show an example of a case where the joint structure of a panel according to the present invention and its construction method are applied to an outer wall panel constituting an outer wall of a building. In the joint structure of the outer wall panel 1 in this embodiment, an irregular sealing material 3 is placed on the bottom surface 2a side of the groove 2 formed in a concave shape in the connecting portion of the outer wall panels 1, 1, and the irregular sealing material 3 It is a watertight structure in which the shaped material 4 is loaded into the groove 2 while the surface is uncured.

  The outer wall panel 1 is a plate-like member made of, for example, generally distributed ALC (Autoclaved Light-weight Concrete), and is attached to, for example, an outer peripheral portion of a steel structure building to constitute an outer wall. Other specific examples of the outer wall panel 1 include PCa plate, GRC, extruded cement plate, ceramic siding, metal siding, painted steel plate, metal panel, glass, stone, and the like.

  The edge portion on the surface side of the outer wall panel 1 is notched, and a concave groove 2 is formed in the connecting portion by connecting two outer wall panels 1 (see FIG. 1 and the like). Although not shown in particular, the groove 2 may be formed such that the side surface of the groove 2 is inclined or a stepped step is provided so that the groove 2 becomes narrower as it becomes deeper.

  The amorphous sealing material 3 is placed in the groove 2 and has a watertight structure at the joint (joint) between the outer wall panels 1 (see FIG. 3 and the like). As the amorphous sealing material 3, a wet sealing material generally distributed according to the material of the outer wall panel can be appropriately selected and used. Especially for the outer wall panel made of ALC, it is flexible. A sealing material such as a modified silicone type, an acrylic urethane type, or a polyurethane type, which is rich and hardly breaks the base material when deformed by an external force such as an earthquake, is preferable. Specific examples include silicones, modified silicones, polysulfides, acrylic urethanes, polyurethanes, modified polysulfides, acrylics, SBRs, butyl rubbers, and polyisobutylenes as defined in JIS A 5758: 1997. Etc. When the paste-like irregular sealing material 3 is placed in the groove 2 using, for example, a sealing gun, and then the surface 3a is pressurized using a spatula, the bottom surface 2a side of the groove 2 is densely filled. At the same time, the surface 3a is finished smoothly.

  The shaped material 4 is used to secure a margin for placing a new shaped sealing material in the groove 2 in advance when the shaped sealing material 3 reaches the end of its useful life. The groove 2 has a width corresponding to the width of 2 and is loaded into the groove 2 so as to be superimposed on the above-described amorphous sealing material 3.

  The shaped material 4 is loaded into the groove 2 until the surface 3a of the above-described amorphous sealing material 3 is cured, and is held by the adhesive force of the surface 3a of the shaped sealing material 3 (see FIG. 4). More specifically, in the state in which the amorphous sealing material 3 is uncured and the surface 3a is sticky, the shaped material 4 is formed in the groove 2 so that the surface 3a of the irregular sealing material 3 and the shaped material 4 are in close contact with each other. When the amorphous sealing material 3 is uncured, it is held by the adhesive force due to the stickiness of the amorphous sealing material 3, and is held by the chemical adhesive force as the amorphous sealing material 3 is cured. . In this way, if the fixed shape material 4 is held by using the adhesive force of the irregular shaped sealing material 3, it is not necessary to separately use an adhesive material or the like. The shaped material 4 can be formed of a plastic material or a synthetic rubber material that is generally distributed as a building gasket material, and is thus retained by the adhesive force of the amorphous sealing material 3. Considering this, it is preferable to use vinyl chloride, TPU (thermoplastic polyurethane), natural rubber, or the like that has good adhesion performance with the irregular sealing material 3.

  In the joint structure with such a combination of the irregular shaped sealing material 3 and the shaped material 4, when a certain number of years have passed since the construction of the new building (the useful life of the irregular shaped sealing material 3), Specifically, after removing the irregular sealing material 3 and placing a new irregular sealing material, only the regular material 4 is removed without removing the irregular sealing material 3. It is possible to place a new amorphous sealing material in the gap formed in the groove 2. Considering this point, it is preferable to set the thickness of the shaped material 4 according to the performance (service life) required after the repair. For example, a new amorphous sealing material having the same performance as the irregular sealing material 3 placed in the groove 2 at the beginning of the new construction is placed in the gap at the time of renovation, and the period from the new construction to the first When it is intended to be equal to the period until the repair, it is preferable to secure the thickness of the shaped material 4 to be approximately equal to the thickness of the amorphous sealing material 3. In addition, when it is assumed that an amorphous sealing material with higher performance than the initially placed amorphous sealing material 3 is used at the time of repair, the thickness of the shaped material 4 is reduced according to the degree of performance. You can also.

  The undercoat coating film layer 5 is formed by a paint applied from the surface of the outer wall panel 1 to the bottom surface 2 a of the groove 2. The coating material is, for example, a synthetic resin emulsion or a solution type synthetic resin, and the coating range is at least the range from the surface of the outer wall panel 1 to the bottom surface 2a of the groove 2 (the notch surface constituting the groove 2). In the present embodiment, in a stage before being attached to the building frame, for example, in a factory for manufacturing the outer wall panel 1, a coating is previously applied to the surface of the outer wall panel 1 to form the undercoat coating layer 5 (FIG. 2). Etc.).

  Then, the construction procedure of the joint structure of the outer wall panel 1 is demonstrated below (refer FIG. 1 etc.).

  First, the outer wall panel 1 in which the surface and the bottom surface 2a of the groove 2 are previously coated in the factory to form the undercoat film layer 5 is attached so as to be connected to the outer peripheral portion of the building. At this time, the groove | channel 2 is formed in the connection part (joint) between the adjacent outer wall panels 1 (refer FIG. 1).

  The undercoat coating layer 5 only needs to be formed at the latest before the irregular sealing material 3 is placed. In this embodiment, the outer wall panel 1 is connected to the outer wall of the building before the outer wall panel 1 is connected to the outer wall of the building. An undercoat coating layer 5 is formed by previously coating the predetermined region. In such a case, it is not necessary to wait until the paint dries at the construction site, which is advantageous for shortening the construction time. Of course, before the outer wall panel 1 is connected to the outer wall of the building, for example, it is possible to form the undercoat coating layer 5 (on-site coating) at the construction site.

  Next, a primer is applied to the surface of the groove 2 that contacts the amorphous sealing material 3. At this time, since the primer coating layer 5 is formed in the groove 2, the primer can be prevented from being absorbed and the brush elongation of the primer can be improved, and the unevenness on the surface of the groove 2 can be smoothed. Thus, it is possible to make it difficult for the primer coating unevenness to occur.

  Further, for example, when the undercoat coating layer 5 is a light-colored system (for example, a white system or a gray system), a primer colored in a dark system (for example, a deep blue system or a green system) is used to enter the groove 2. The formation state of the primer layer can be easily confirmed visually.

  Next, the irregular sealing material 3 is driven into the groove 2 using a sealing gun (see FIG. 3), and then pressed with a spatula so that the irregular sealing material 3 is densely driven into the groove 2. The surface 3a is finished smoothly while being provided. At this time, a margin for loading the shaped material 4 is secured on the surface side of the groove 2.

  Next, before the surface 3a of this irregular shaped sealing material 3 is cured, the shaped material 4 is loaded into the groove 2 and held by the adhesive force of the surface 3a of the irregular shaped sealing material 3 (see FIG. 4). Specifically, the operator can bring the shaped material 4 into intimate contact with the surface 3a of the irregular shaped sealing material 3 by the operation of pushing the shaped material 4 into the groove 2 and adhere it by its adhesive force.

  Thereafter, a top coat is simultaneously sprayed on the surfaces of the outer wall panel 1 and the shaped material 4 to form a top coat film 6 (see FIG. 4).

  As described so far, according to the joint structure of the outer wall panel 1 in the present embodiment, the undercoat coating layer 5 is formed in the predetermined range (at least the groove 2) of the outer wall panel 1 before the outer wall panel 1 is connected. (Refer to FIG. 1), at least the range (at least the range including the portion of the side surface of the groove 2 in contact with the shaped material 4). Can be protected. According to this, the new irregular shaped sealing material is filled until the panel repair work such as removing the regular shaped material 4 from the groove 2 in the connecting portion of the outer wall panel 1 and filling it with another irregular shaped sealing material. It is possible to protect the side surface of the groove 2 at the portion to be formed from deterioration, foreign matter adhesion, and the like. Therefore, according to this joint structure, when the panel is repaired, it is not necessary to separately perform operations such as cleaning the groove side surfaces.

  Further, since the fixed shape material 4 is held by utilizing the adhesive force of the non-standard sealing material 3, it is not necessary to provide a projection or the like on the fixed shape material 4, and the cost can be reduced.

  In addition, after placing the irregular sealing material 3, the regular molding material 4 can be loaded immediately, and since the irregular sealing material 3 does not require aesthetic performance, the finishing work can be simplified and the construction period can be simplified. It is possible to reduce the cost and cost.

  Furthermore, since it is not necessary to make the shape of the shaped material 4 complicated, there is also an advantage that when the joint material is repaired after the passage of time, it does not require time and effort to remove the shaped material 4.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the shaped material 4 is held by using the adhesive force of the amorphous sealing material 3. However, in some cases, the shaped material 4 is temporarily attached by the adhesive force of the amorphous sealing material 3. It is also possible to hold the shaped material 4 more stably by another means (for example, the top coat film 6) (see FIG. 4).

DESCRIPTION OF SYMBOLS 1 ... Outer wall panel (panel), 2 ... Groove, 2a ... Bottom face of groove, 3 ... Amorphous sealing material, 3a ... Surface of amorphous sealing material, 4 ... Shaped material, 5 ... Undercoat layer, 6 ... Top coat film

Claims (2)

A groove formed in a concave shape in the connecting portion of the two panels;
An irregular sealing material placed on the bottom side of the groove;
A shaped material loaded on the surface side of the groove,
Before the amorphous sealing material is applied from the surface of the panel to the bottom of the groove, an undercoat coating layer is formed in advance,
A joint structure for a panel, wherein an overcoat film is formed from the surface of the panel to the surface of the shaped material after the shaped material is loaded in the groove.   The joint structure of a panel according to claim 1, wherein the panel is made of ALC.

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