JP2006283509A - Joint structure and joint remodeling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure and a joint remodeling method, shortening a construction period, and reducing cost in remodeling, while enhancing reliability for waterproofing by combining an indefinite sealant and a definite form sealant. <P>SOLUTION: This joint structure between outer wall panels is composed of the indefinite form sealant 14 and the definite form sealant 15 for covering the indefinite form sealant; and is characterized in that the definite form sealant 15 can be partially or wholly removed without processing the indefinite form sealant 14, and a space capable of filling a new indefinite form sealant equivalent to at least one layer, is formed in a space after removing a removable part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint structure between outer wall members of a building and a joint repair method.

  The joints between the outer wall members of the building need to have a watertight structure. Conventionally, the joints are filled with irregular sealing material (wet jointing material), or fixed sealing material (dry jointing material) is used for waterproof construction. It is carried out.

  In a joint structure filled with an irregular sealing material, shrinkage, cracking, peeling, etc. occur due to deterioration of the sealing material over time, and the waterproof performance deteriorates. The repair of such irregular shaped seals after a period of time is generally done by removing the existing sealant with a cutter and filling it with a new sealant, but there remains a thin film of sealant that cannot be completely removed in the joint. This is difficult to avoid, and the presence of a residual thin film at the interface between the new sealing material and the joint reduces the waterproof reliability of the interface.

  In order to solve such a problem, for example, in Patent Document 1, after filling and removing the residual thin layer of the sealing material by filling the sealing groove with the sealing material dissolving agent in the joint groove from which the irregular sealing material has been removed with a cutter or the like, A method of filling a new sealing material has been proposed.

  On the other hand, renovation of the standard seal material is often minor compared to the non-standard seal material, but because the follow-up to the expansion and contraction fluctuation of the joint spacing is insufficient, and a joint is formed at the intersection, etc. Reliability is considered inadequate.

  For this reason, in recent years, various joint structures in which a fixed sealing material and an irregular sealing material are combined have been proposed in order to increase the reliability in waterproofing (see, for example, Patent Documents 2 to 6). In these joint structures, the interior side of the joint groove is filled with an irregular sealing material and the outdoor side is filled with a regular sealing material to form a double watertight structure. There is a possibility that a highly reliable waterproof structure can be realized over a long period of time.

JP 2001-140365 A JP-A-10-183784 Japanese Patent No. 2992844 Japanese Patent No. 2849900 JP 2000-45408 A Japanese Patent No. 3621741

  The long-term survival of buildings is recognized as being meaningful in terms of the global environment, such as saving earth resources and reducing building waste and construction energy. Therefore, it is necessary to make the building last longer by continuous renovation and maintenance, and the renovation of the outer wall joint is required to be easy and waterproof and highly reliable.

  According to the joint structure in which the fixed sealing material and the irregular sealing material as described in Patent Documents 2 to 6 are combined, the waterproof structure is more reliable for a long time than the single joint structure. As described above, the gap between the fixed seal material and the outer wall member is due to the fact that the fixed seal material has insufficient followability to expansion / contraction fluctuations of joint spacing and is affected by chemical and physical effects such as heat and vibration. Occurs. As a result, water stays between the regular sealing material and the irregular sealing material, or the outside air enters, and thus the aging deterioration of the irregular sealing material is inevitable.

  For this reason, although it is necessary to repair the joint structure in which the fixed seal material and the irregular seal material are combined, Patent Documents 2 to 6 do not mention any repair of the joint.

  Even in the case of repairing a joint structure in which a fixed seal material and an irregular seal material are combined, the problem of the residual thin film of the irregular seal material described above remains, for example, after removing the fixed seal material, it was described in Patent Document 1 By using such a repair method, it is possible to perform a waterproof and highly reliable repair.

  However, in the repair method described in Patent Document 1, (1) it is necessary to manually remove the irregular sealing material using a cutter or the like, and (2) the dissolution reaction after filling the sealing material dissolving agent. It is necessary to leave for a certain period of time until (3) is completed, and (3) it is necessary to cure the sealant solubilizer (e.g., volatilization prevention). In addition, in the construction method that combines the fixed seal material and the irregular seal material, the shape of the joint is deeper and more complicated than in the case of the single seal material method, so that the irregular seal material can be removed at the time of repair. Often difficult.

  At the present time when many types of industries and industries are required to respond to the environment, it is desirable from the viewpoint of extending the life of buildings that renovation of the outer wall joints is more rational and reliable. The repair method has a problem that the repair cost increases as the repair period becomes longer.

  The present invention solves the above-mentioned problems of the prior art, and improves the reliability in waterproofing by combining an indeterminate sealing material and a shaped sealing material, and also has a joint structure and joint that can shorten the work period and reduce the cost associated with the repair. The purpose is to provide a repair method.

The present invention made to achieve the above object is a joint structure between outer wall panels comprising an irregular sealing material and a regular sealing material covering the irregular sealing material, and the regular sealing material comprises: A part or the whole can be removed without modifying the amorphous sealing material, and the space after removing the removable part has a space that can be filled with at least one layer of the new irregular sealing material. It is formed.
The fixed sealing material includes a “removal part” and a “residual part”, and the “residual part” covers the “fin part” and the irregular sealing material that are in close contact with the irregular sealing material. It has a “fixing portion” to be embedded and fixed, and is joined to the “removal portion” so as to remain when the “removal portion” is removed.
Further, the fixed sealing material is insulated from the irregular sealing material, and can be removed entirely without modifying the irregular sealing material. In addition, the fixed sealing material is locked by a “locking portion” provided on the outer wall panel.

  Further, the present invention is a method for repairing joints between outer wall panels comprising an irregular shaped sealing material and a shaped sealing material covering the irregular shaped sealing material, wherein the irregular shaped sealing material is left in the state where the irregular shaped sealing material is left. After the seal material is partially or entirely removed, the space formed by removing the fixed seal material is filled with a new irregular seal material.

According to the joint structure of the present invention, the amorphous sealing material is covered with the regular sealing material that can be removed partially or entirely without removing the irregular sealing material, and the removable portion of the regular sealing material is removed. As a result, a space that can be filled with a new irregular shaped sealing material corresponding to an arbitrary number of times of renovation is formed, so that a new irregular shaped sealing material is filled over the existing irregular shaped sealing material for renovation. be able to. Therefore, the repair can be performed without removing the existing irregular sealing material, and the construction period and cost reduction associated with the repair can be reduced.
Further, since the existing irregular sealing material remaining after the repair can be expected to have a certain performance as a waterproof layer, the reliability of the waterproofness of the joint after the repair is improved.
In addition, since the amorphous sealing material is protected from ultraviolet rays and wind and rain by the regular sealing material, durability of the irregular sealing material is improved. In addition, since the fixed sealing material is primary waterproof and the irregular sealing material is secondary waterproof, the waterproof performance of the entire joint is improved.

  Further, according to the joint repair method of the present invention, the repair is performed without removing the existing irregular sealing material, so that the work period and cost reduction associated with the repair can be reduced.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a sectional view showing a joint structure in a new construction according to a first embodiment of the present invention. In the figure, 11 is an outer wall panel, 12 is a joint, 13 is a backup material, 14 is an irregular sealing material, and 15 is a regular sealing material.

  In the joint structure of this example, the backup material 13 is inserted into a fixed position of the joint 12 between the outer wall panels 11, 11, and after filling an appropriate amount of the irregular sealing material 14, the fixed sealing material 15 is loaded. Forming a double watertight structure.

  If the irregular sealing material is used, it is contaminated by dust and dirt on the surface. In addition, in the case of a method of painting on an irregular shaped sealing material, the coating film cannot follow the movement of joints, cracking of the coating film occurs, or the plastic component of the irregular shaped sealing material is transferred to the coating film There is a concern about aesthetic defects caused by softening of the coating film and contamination of the coating film. However, by covering the irregular sealing material with the regular sealing material as in the present invention, these problems do not occur, thereby improving the aesthetics of the outer wall joint.

  Further, in the joint structure of the present invention, the fixed sealing material can be loaded immediately after filling the irregular sealing material, and the aesthetic performance is not required for the irregular sealing material, so that the finishing work can be simplified. The construction period can be shortened and the cost can be reduced.

  Below, each member which comprises the joint structure of this example is demonstrated.

(External wall panel)
The outer wall panel 11 has a surface pre-coated with a waterproof paint to a range a that partially wraps with the irregular sealing material 14. Specific examples of the outer wall panel include an ALC panel, a PCa plate, a GRC, a cement extruded plate, a ceramic siding, a metal siding, a coated steel plate, and a metal panel.

  In addition, the joint structure of this example can be repaired twice as described later, and the outer wall panel 11 has a thickness that can be increased twice by adding a new amorphous sealing material. . Specifically, when the joint width is 10 to 20 mm, a joint depth of about 10 mm to 15 mm is appropriate. Therefore, the joint thickness of the building scheduled to be repaired twice with a joint width of 10 mm is, for example, 10 mm (backup). Material) + 10mm (Unfixed seal material at the time of new construction) + 2mm (Fixed seal material at the time of new construction) + 10mm (Unfixed seal material at the time of renovation) + 2mm (Fixed seal material at the time of renovation) + 10mm (2 times of renovation) (Unfixed seal material) +2 mm (exposed portion of the fixed seal material when repaired twice) = 46 mm is necessary.

(Backup material)
The backup material 13 has a regularity, and examples thereof include a foamed polyolefin type that is usually used and a nonflammable inorganic fiber.

(Unshaped seal material)
Specific examples of the amorphous sealing material 14 include silicone, modified silicone, polysulfide, acrylic urethane, polyurethane, modified polysulfide, acrylic, SBR, butyl rubber, JIS A 5758: 1997. Examples include polyisobutylene-based ones.

(Standard seal material)
Since the irregular sealing material 14 alone is a deep joint and has a problem in appearance, the external appearance is adjusted by covering with the regular sealing material 15 that also serves as an increase in volume.

  The fixed sealing material 15 is composed of a residual portion 16 that remains between a new amorphous sealing material that is filled by renovation described later and the existing irregular sealing material 14, and a removal portion 17 that is removed during refurbishment. Become.

  The remaining portion 16 includes a fin portion 16 a that is in close contact with the irregular sealing material 14 and a fixing portion 16 b that is embedded and fixed in the irregular sealing material 14.

  The fin portion 16a is renovated by holding the surface of the irregular sealing material 14 at the time of new construction to prevent the irregular irregular sealing material from hanging down due to daily vibration and preventing the irregular sealing material from protruding. At times, a space that can be filled with a new irregular sealing material is secured.

  When the irregular sealing material 14 is cured, the fixing portion 16b is embedded and fixed in the irregular sealing material 14, and natural falling off due to wind, rain, earthquake, traffic vibration or the like of the irregular sealing material 15 can be prevented.

  The removal part 17 has an exposed part 17a and a plate-like part 17b having a predetermined height.

  The exposed portion 17a has a width wider than the joint interval, prevents the fixed seal material from falling off until the amorphous seal material 14 is hardened by friction due to bending, and has a follow-up ability to the expansion and contraction of the joint after hardening. Ensure waterproofness. In addition, since the surface of the exposed part 17a can be visually observed on the external appearance, aesthetic considerations are necessary.

  The plate-like portion 17b has a height that can secure a space that can be filled with at least one layer of a new amorphous sealing material when the removal portion 17 is removed at the time of repair. It has a height that can be repaired once.

  A notch 18 is formed at the boundary between the remaining portion 16 and the removal portion 17. The notch part 18 is provided with a fine cut in a line shape, and at the time of refurbishment, a notch part is created so that only the removal part 17 can be easily removed without modifying the amorphous sealing material 14. .

(Construction procedure)
The construction procedure of the joint structure of this example (at the time of new construction) is briefly shown below.
1. 1. Installation and installation of outer wall panel 11 2. Apply a sealing primer to the portion filled with the irregular sealing material 14. 3. Push in the backup material 13 and fix it. 4. Fill the irregular sealing material 14 with a sealing gun having a long nozzle, press the pressure while scraping off the excess sealing with a spatula, and bring it into close contact with the target side surface of the outer wall panel 11. 5. Immediately after filling the irregular shaped sealing material 14, the regular sealing material 15 is attached. Spray the paint on the outer wall panel 11 together with the fixed sealing material 15 (not required if the paint is precoated on the outer wall panel)

Next, the first repair method of the joint structure of this example will be described.
FIG. 2 shows the joint structure after the first repair as a cross-sectional view. In the figure, reference numeral 24 is a new irregular seal material filled at the time of the renovation, and 25 is a new regular seal material.

  As described above, the fixed sealing material 15 installed at the time of new construction has a notch portion 18 formed at the boundary between the remaining portion 16 and the removal portion 17, and if a notch is given to a part of the notch portion 18, it becomes easy thereafter. Since it tears along a notch line, only the removal part 17 can be easily removed leaving the residual part 16. After the removal portion 17 is removed, a predetermined space is formed. After filling the space with an appropriate amount of the irregular sealing material 24, the fixed sealing material 25 is loaded to form a joint structure as illustrated. .

  The new amorphous sealing material 24 can use the same material as the amorphous sealing material 14 at the time of new construction.

  The new fixed seal material 25 is composed of a residual portion 26 having a fin portion 26a and a fixing portion 26b, and a removal portion 27 having an exposed portion 27a and a plate-like portion 27b, like the fixed seal material 15 at the time of new construction. Each of these parts has the same function as each part of the corresponding fixed sealing material 15.

  The only difference between the new standard sealing material 25 and the new standard sealing material 15 is that the plate-shaped portion 17b has a space that can be filled with two layers of new irregular sealing material when the removal portion 17 is removed. Whereas the plate-like portion 27b has a height as high as possible, the plate-like portion 27b has a height sufficient to secure a space that can be filled with a new amorphous sealing material for one layer when the removal portion 27 is removed. It is a point.

(Construction procedure)
The construction procedure for the first repair of the joint structure of this example will be briefly described below.
1. 1. Remove the removal portion 17 of the regular sealing material 15 2. Apply a sealing primer to the portion filled with the new irregular sealing material 24. 3. Fill the irregular sealing material 24 with a sealing gun having a long nozzle, press the pressure while scraping off the excess sealing with a spatula, and bring it into close contact with the target side surface of the outer wall panel 11. 4. Immediately after filling the irregular sealing material 24, the regular sealing material 25 is attached. The outer wall panel 11 is sprayed with paint b together with the fixed sealing material 25.

Next, a second repair method for the joint structure of this example will be described.
FIG. 3 shows the joint structure after the second repair as a cross-sectional view. In the figure, 34 is a new irregular shaped sealing material filled at the time of the renovation, and 35 is a new regular shaped sealing material.

  The fixed sealing material 25 installed at the first refurbishment also has a notch portion 28 formed at the boundary between the remaining portion 26 and the removal portion 27, and if a notch is given to a part of the notch portion 28, the notch portion is easily formed thereafter. Since it tears along a line, only the removal part 27 can be easily removed leaving the residual part 26. After removing the removing portion 27, a predetermined space is formed. After filling the space with an appropriate amount of the irregular shaped sealing material 34, the shaped sealing material 35 is loaded to form a joint structure as shown in the figure. .

  The new amorphous sealing material 34 can use the same material as the amorphous sealing material 14 at the time of new construction.

  The new fixed sealing material 35 has the same form as the remaining portion 16 of the fixed sealing material 15 at the time of new construction, and includes a fin portion 36a and a fixing portion 36b. It has the same function. The fin portion 36a has a function similar to that of the exposed portion 17a of the fixed sealing material 15 at the time of new construction and can be visually observed on the appearance, so that aesthetic considerations are necessary.

(Construction procedure)
The construction procedure at the time of the second repair of the joint structure of this example is briefly shown below.
1. 1. Remove the removal portion 27 of the regular sealing material 25. 2. Sealing primer is applied to the portion filled with the new amorphous sealing material 34. 3. Fill the irregular sealing material 34 with a sealing gun, press the pressure while scraping off the excess sealing with a spatula, and bring it into close contact with the target side surface of the outer wall panel 11. 4. Immediately after filling the irregular shaped sealing material 34, the regular shaped sealing material 35 is attached. The outer wall panel 11 is sprayed with the coating material c together with the fixed sealing material 35.

  In addition, when using the material which is especially excellent in a weather resistance, for example, silicone rubber etc., as the non-standard sealing material 34, as shown in FIG. 4, it is also possible to abbreviate | omit the standard sealing material 35. The construction procedure in this case is briefly shown below.

(Construction procedure)
1. 1. Remove the removal portion 27 of the regular sealing material 25. 2. Spraying paint d + curing 3. 3. Apply a sealing primer to the portion filled with the new irregular sealing material 34. Fill the amorphous seal material 34 with a sealing gun, and press the pressure while scraping off the excess sealing with a spatula to bring it into close contact with the target side surface of the outer wall panel 11.

  In the joint structure of this example, as shown in FIGS. 2 to 4, the joint structure after the repair is a new irregular seal material in which the fin portion 16a (or the fin portion 26a) of the fixed seal material that remains in the repair is left as it is. 24 (or the irregular sealing material 34). If the irregular sealing material has a strong degree of curing with time, if the three surfaces (both ends and bottom of the joint) are bonded, the elasticity of the sealing material is lost and it becomes impossible to cope with the expansion / contraction variation of the joint spacing. This will cause the sealing material to crack or break.

  For this reason, in order to prevent three-surface adhesion, it is important to consider that at least the fin portion 16a (or the fin portion 26a) of the regular sealing material is difficult to adhere to the irregular sealing material. Specifically, for example, a peeling treatment such as using PP or PE which is generally recognized as difficult to adhere to an irregular shaped sealing material as a material of the shaped sealing material, or a release paper is stuck on the bottom of the fin portion It is better to use the one that has been marked. In addition, when release paper is stuck on the bottom of the fin part, in addition to PP and PE, plastics such as vinyl chloride and TPO, chloroprene (CR), EPDM, chlorosulfonated polyethylene (CSM) Synthetic rubbers such as SR and urethane can also be used.

  As explained above, in the joint structure of this example, it is possible to fill and repair a new amorphous sealing material on top of the existing irregular sealing material without removing the existing irregular sealing material. Renovation can be performed, and it is possible to reduce the construction period and cost associated with the renovation. In addition, the fixed sealing material protects the irregular sealing material from ultraviolet rays, wind and rain, and the existing irregular sealing material remaining after the repair can be expected to have a certain performance as a waterproof layer. The reliability of waterproofing can be increased.

[Second Embodiment]
FIG. 5 is a sectional view showing a joint structure at the time of new construction according to the second embodiment of the present invention.

  In the first embodiment, the notch portion 18 is formed at the boundary between the residual portion 16 and the removal portion 17 of the fixed seal material 15, but the fixed seal material 15 of this example has the residual portion 16 and the removal portion 17 fitted to each other. As in the first embodiment, only the removal portion 17 can be easily removed without modifying the amorphous sealing material 14 at the time of refurbishment.

  Also in the joint structure of this example, construction and renovation at the time of new construction can be performed in the same manner as in the first embodiment. In addition, the structure of the fitting part f is not limited to the illustrated example, and an appropriate structure may be adopted as long as only the removal part 17 can be removed without modifying the amorphous sealing material 14 at the time of repair. it can.

[Third Embodiment]
FIG. 6 shows a joint structure at the time of new construction according to the third embodiment of the present invention as a sectional view. In the figure, 61 is a fixed seal material, and 62 is a backup material.

  In the first and second embodiments, a part of the standard sealing material (removal part 17) is removed at the time of renovation, but in this example, the entire standard sealing material is removed at the time of renovation.

  The regular sealing material 61 of this example does not have the fixing portion 16b embedded in the irregular sealing material as in the previous embodiment, and includes an exposed portion 61a, a bottom surface portion 61b, and a plate-like portion 61c. When the fixed sealing material 61 is removed at the time of refurbishment, it has a height that can secure a space that can be filled with at least one layer of the new irregular sealing material. Further, at least the bottom surface portion 61b of the fixed sealing material 61 uses PP or PE that is generally recognized to be difficult to adhere to the irregular sealing material, or a release paper is pasted on the bottom of the bottom surface portion 61, etc. Use a material that has been peeled off.

  With the above configuration, the fixed sealing material 61 and the irregular sealing material 14 can be insulated, and the fixed sealing material 61 can be easily peeled off at the interface between the irregular sealing material 14 and the bottom surface portion 61b at the time of repair.

  As described above, in this example, the fixed sealing member 61 is insulated from the non-fixed sealing member 14. Therefore, in order to prevent the fixed sealing member 61 from falling off, a locking portion (recessed portion) is formed on the outer wall panel 11. ) 63, and both ends of the bottom surface portion 61b are locked to the locking portion 63.

  Also in the joint structure of this example, construction and renovation at the time of new construction can be performed according to the first embodiment example. In FIG. 6, the outer wall panel 11 is provided with only one stage of the locking part (recessed part) 63, but when a plurality of repairs are performed, a plurality of stages of locking part (recessed part) 63 are provided.

  In the joint structure of this example, since the new amorphous sealing material is filled directly on the existing irregular sealing material at the time of repair, the degree of curing of the existing irregular sealing material with time is weak. Even if it becomes surface bonding, it is suitable when the existing sealing material follows the behavior of the new irregular sealing material.

  Moreover, since the residual part of a fixed form sealing material does not remain in the joint structure after repair like the previous embodiment example, it is suitable when the thickness of the outer wall panel 11 is thin. When the outer wall panel 11 is thin, the backup material 62 is preferably a thin sheet plate as shown in the figure.

  In addition, when removing the whole fixed sealing material at the time of repair like this example, it is necessary to insulate a fixed sealing material and an indeterminate sealing material. As the insulating method, as described above, the fixed sealing material is made of a material that is difficult to adhere to the non-standard sealing material, or the release sealing paper is used. For example, as shown in FIG. It is also possible to construct with a predetermined gap between the fixed sealing materials 14.

It is sectional drawing which shows the joint structure at the time of new construction which concerns on the 1st Example of this invention. It is sectional drawing which shows the joint structure after the 1st repair based on the 1st Example of this invention. It is sectional drawing which shows the joint structure after the 2nd repair based on the 1st Example of this invention. It is sectional drawing which shows another joint structure after the 2nd repair based on the 1st Example of this invention. It is sectional drawing which shows the joint structure at the time of new construction which concerns on the 2nd Example of this invention. It is sectional drawing which shows the joint structure at the time of new construction which concerns on the 3rd Example of this invention. It is sectional drawing which shows the joint structure at the time of the new construction of this invention which provided the clearance gap between the fixed form sealing material and the non-standard shaped seal material.

Explanation of symbols

11 External wall panel 12 Joint 13 Back-up material 14, 24, 34 Amorphous seal material 15, 25, 35 Fixed seal material 16, 26 Residual portion 16a, 26a, 36a Fin portion 16b, 26b, 36b Fixing portion 17, 27 Removal portion 17a 27a Exposed portion 17b, 27b Plate-like portion 18, 28 Notch portion 61 Fixed sealing material 61a Exposed portion 61b Bottom portion 61c Plate-like portion 62 Backup material 63 Locking portion (recessed portion)

Claims (5)

  A joint structure between outer wall panels comprising an amorphous seal material and a regular seal material covering the irregular seal material, wherein the regular seal material is a part of the irregular seal material without modification. Alternatively, the joint structure is characterized in that a space that can be completely removed and a space that can be filled with at least one layer of a new amorphous sealing material is formed in the space after the removable portion is removed.   The fixed sealing material is composed of a “removal part” and a “residual part”, and the “residual part” is embedded in the “fin part” and the irregular sealing material that are in close contact with the irregular sealing material, 2. The joint structure according to claim 1, further comprising a “fixing portion” to be fixed, and being joined to the “removal portion” so as to remain when the “removal portion” is removed. .   2. The joint structure according to claim 1, wherein the fixed sealing material is insulated from the amorphous sealing material and can be removed entirely without modifying the amorphous sealing material.   The joint structure according to claim 3, wherein the fixed sealing material is locked by a “locking portion” provided on the outer wall panel.   A method for repairing joints between outer wall panels, comprising: an irregularly shaped seal material; and an irregularly shaped seal material that covers the irregularly shaped seal material, wherein the irregularly shaped seal material is left partially or A method for repairing a joint, comprising: removing all the fixed sealing material after removing all of the fixed sealing material, and filling a space formed by removing the fixed sealing material.

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