JP6903346B2 - Floating repair method for outer wall and anchor pin with inlet - Google Patents

Description

The present invention relates to a repair method for preventing the outer wall from peeling off in a tile-finished outer wall or a mortar-finished outer wall of a building, and an anchor pin with an injection port used in this repair method. The repair method particularly relates to a repair method for preventing tile peeling of an extruded cement plate tile-finished outer wall formed by laminating tiles on an extruded cement plate (ECP: Extruded Cement Panel) with mortar or an adhesive.

Buildings such as buildings and condominiums are provided with tile-finished outer walls, mortar-finished outer walls, etc. on the surface of the skeleton in order to protect the concrete skeleton and improve its aesthetic appearance. For example, an extruded cement board is a building material in which a composition containing cement, a siliceous raw material, and a fibrous raw material is extruded into a plate shape having a hollow inside and autoclaved. The extruded cement plate is rectangular and has a convex portion on one side and a concave portion on the other side. The outer wall is constructed by fitting the convex portion and the concave portion and fixing them with hardware. Extruded cement boards are widely used as outer walls of buildings because of their excellent fire resistance, design, soundproofing, and light weight. In addition, tiles may be attached to the surface of an outer wall constructed of an extruded cement board to form an extruded cement board tile-finished outer wall.

FIG. 5 shows a cross-sectional view of an extruded cement board tile-finished outer wall (hereinafter, also referred to as “ECP tile-finished outer wall”). In the ECP tile-finished outer wall, the tile 3 is attached to the surface of the extruded cement plate 1 via the mortar 2. In the present specification, the same members are designated by the same reference numerals.
Here, if peeling (hereinafter, also referred to as “floating”) occurs between the tile of the ECP tile-finished outer wall and the mortar attached, or between the mortar attached and the extruded cement plate, daily vibrations, earthquakes, etc. There is a risk that the tiles will come off. If the peeled tile or the like falls from a high place, a serious accident such as death or injury may occur. Therefore, it is necessary to properly repair the floating of the tile.

In order to repair the floating of tiles, it is sufficient to replace the tiles, but since the replacement of tiles involves noise, dust, vibration, etc., it is suitable for residents, users, etc. of the building to be repaired and surrounding buildings. It causes annoyance. In addition, it is common to replace tiles only in areas where there is a float in order to keep costs down, but since it is difficult to obtain tiles with the same color tone as existing tiles, tiles with different color tones are mixed after repair. As a result, the aesthetics of the building may be spoiled.

As a lower cost and simpler floating repair method, an anchor pin with an injection port is inserted into a hole drilled in the skeleton, the tip of the anchor pin is expanded to bite into the skeleton and fixed, and this anchor pin with an injection port is used. There is known a fall prevention method in which a resin is injected into a floating region and tiles are fixed by an anchor pin and a cured resin to prevent the tile from falling (for example, Patent Documents 1 and 2).
The anchor pin with an injection port used in such a fall prevention method has a tubular shape that penetrates to the tip in order to expand the tip and bite into the skeleton, and a slit is provided at the tip. There is.

When the above-mentioned conventional anchor pin with an injection port is used for repairing the floating on the extruded cement board tile finish outer wall, the tip of the anchor pin with an injection port reaches the hollow portion inside the extruded cement board. The anchor pin with an injection port whose tip reaches the hollow portion cannot be fixed by expanding the tip, and the injected resin leaks into the hollow portion and is not filled inside the floating region. Therefore, the conventional method using an anchor pin with an injection port cannot repair the floating of the extruded cement board tile-finished outer wall.

Japanese Patent No. 4289627 Japanese Patent No. 5608931

An object of the present invention is to provide a repair method for preventing peeling of an outer wall due to floating, and an anchor pin with an injection port used in this repair method.

1. 1. A drilling process that drills a hole in the area where the outer wall is floating,
An anchor pin with an injection port, which has a screw shape including a head and a screw portion and has a resin injection path for connecting an injection port provided on the head and an opening provided on a side surface of the screw portion, is described above. Anchor pin fixing process to fix to the hole,
An bonding step of injecting an injection material from the injection port, injecting the injection material into the floating region through the opening, and adhering the floating.
A repair method characterized by being equipped with.
2. The outer wall is an extruded cement board tile-finished outer wall. The repair method described in.
3. 3. 2. The hole is formed in the center of the tile. The repair method described in.
4. 1. The injection material is a high-viscosity type defined by JIS A6024. ~ 3. The repair method described in any of.
5. It is characterized in that a plurality of holes are perforated at intervals of 20 cm or more and 35 cm or less. ~ 4. The repair method described in any of.
6. It has a screw shape with a head and a screw part.
An anchor pin with an injection port, which has a resin injection path for connecting an injection port provided on the head and an opening provided on a side surface of the screw portion.
7. 6. The opening is provided in a range of 5 mm or more and 20 mm or less from the end portion on the head side. Anchor pin with inlet as described in.
8. The threaded portion is composed of a first threaded area having a first thread, a flat area without a thread, and a second threaded area having a second thread from the head side.
6. The opening is located within a flat region. Or 7. Anchor pin with inlet as described in.

In the repair method of the present invention, by using an anchor pin with an injection port having an opening on the side surface of the threaded portion, the injection material can be reliably injected into the floating region, so that the floating generated on the outer wall can be reduced at low cost. Moreover, it can be easily repaired. Since the repair method of the present invention can be performed by almost the same work as the conventional method using an anchor pin with an injection port, it is not necessary for the builder to acquire new skills through training or the like, and a construction error due to lack of experience. Etc. are unlikely to occur. Unlike the conventional anchor pin with an injection port that expands the tip, the anchor pin with an injection port of the present invention does not need to expand the tip and bite into the skeleton, so that noise during construction can be suppressed.

Since the injection material does not flow out from the tip of the anchor pin with an injection port to be used, the repair method of the present invention can be suitably used for a tile-finished outer wall of an extruded cement plate having a hollow inside. Tiles are stronger than joints. In the repair method of the present invention in which the injection material is injected from the hole formed in the center of the tile, cracks in the tile and joints due to co-floating due to injection are unlikely to occur. Further, by injecting the injection material from the hole formed in the central portion of the tile having excellent strength, the high-viscosity type injection material can be used. Since the high-viscosity injection material fills the inside of the float without gaps, the tile-finished outer wall after repair has excellent adhesive strength, and it is possible to prevent the occurrence of float and the peeling of tiles for a long period of time. ..

The anchor pin with an inlet has a screw shape and can be firmly fixed to the hole by a screw thread. Further, since the injection material flows out only from the opening on the side surface of the threaded portion of the anchor pin with an injection port, the injection material can be efficiently injected into the floating region. In the anchor pin with an injection port of the present invention, even if the tip reaches the hollow portion inside the extruded cement plate, the injection material does not leak into the hollow portion, and the injection material can be reliably injected into the floating region. Therefore, it can be suitably used for an extruded cement board tile-finished outer wall.

A cross-sectional view of an extruded cement board tile-finished outer wall according to an embodiment in which the repair method of the present invention is applied. The front view of the extruded cement board tile finish outer wall which is an embodiment in which the repair method of this invention was carried out. A schematic view (a) of an anchor pin with an injection port, which is the first embodiment, and a 90-degree rotation cross-sectional view (b) of the anchor pin with an injection port shown in the schematic view (a). The schematic diagram of the anchor pin with an injection port which is 2nd Embodiment. Sectional view of a conventional extruded cement board tile finish exterior wall.

The present invention relates to a repair method for preventing tile peeling due to floating generated on an outer wall.
Specifically, the repair method of the present invention is:
A drilling process that drills a hole in the area where the outer wall is floating,
An anchor pin with an injection port, which has a screw shape having a head and a threaded portion and has a resin injection path for connecting an injection port provided on the head and an opening provided on the side surface of the threaded portion, is fixed to the hole portion. Anchor pin fixing process,
An adhesive process in which an injection material is injected from the injection port of this anchor pin with an injection port, the injection material is injected from the opening into the floating area, and the floating is adhered.
It is characterized by having.

A cross-sectional view of an extruded cement board tile-finished outer wall, which is an embodiment in which the repair method of the present invention is applied, is shown in FIG. 1, and a front view is shown in FIG. Hereinafter, a repair method according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
The tile-finished outer wall according to the repair method shown in FIGS. 1 and 2 includes a tile-based panel type extruded cement plate 1 having a hollow portion 11 inside, a pasted mortar 2, a tile 3, and the tile 3. It is provided with an injection material 4 filled in a float generated between the extruded cement plate 1 and the pasted mortar 2. A hole 5 is formed in the central portion of the tile 3, and an anchor pin 6 with an injection port, which is the first embodiment, is fixed to the hole 5. In addition, there are joints between the adjacent tiles 3.

The examples shown in FIGS. 1 and 2 are one embodiment, and the repair method of the present invention is not limited to this one embodiment, and any outer wall that causes floating can be constructed without particular limitation. For example, it can be applied to a concrete skeleton, a tile-finished outer wall such as an ALC plate or a PC plate, a mortar-finished outer wall, or the like. For tile finishing of extruded cement boards, refer to "Building Work Standard Specifications / Explanation JASS19 Ceramic Tiling Work" of the Japan Society for Architecture (JASS), and flat panel type extruded when tiled with adhesive. It is stipulated that a tile-based panel type extruded cement plate should be used when tiles are to be tiled with a molded cement plate or mortar. However, the extruded cement plate 1 is a flat panel type, and an adhesive is used instead of the pasted mortar. It can also be used. Furthermore, the anchor pin with an injection port of the present invention is not limited to the anchor pin 6 with an injection port according to the first embodiment.

"Punching process"
First, the surface of the tile-finished outer wall is lightly percussed using a test hammer or the like, the floating of the pasted mortar peeled off from the extruded cement plate is confirmed, and the floating area is marked. In addition, if necessary, the width of the floating allowance (distance between the extruded cement plate and the pasted mortar) is confirmed by an endoscope or the like.
A reference hole 5 is drilled in the portion of the floating region having the largest floating allowance or in the center of the tile 3 located at the center of the floating region using a vibration-free drill or the like.

Next, in the floating region, a plurality of holes are drilled in the center of the tile at intervals of about 30 cm in the vertical and horizontal directions from the reference hole 5. At this time, the portion within half of the distance between the holes and the end of the floating region (for example, in the repair method according to one embodiment in which the distance between the holes is 30 cm, the portion within 15 cm from the end of the floating region). It is preferable not to perforate the hole. If the hole is close to the end of the floating area, the floating area may be widened due to the co-floating that occurs when the injection material is injected into the hole. As a general rule, the holes are perforated in the skeleton to a depth of 20 mm or more. Further, a so-called two-step digging is performed in which a shallow hole having a diameter larger than the hole diameter of the hole is drilled in the opening of the hole 5 for accommodating the decorative cap 7 described later.
In one embodiment shown in FIGS. 1 and 2, the tip of the anchor pin 6 with an injection port reaches the hollow portion 11 of the extruded cement plate, but the anchor pin 6 with an injection port is between the hollow portions 11. It may be fixed to the rib on which it is located. Further, the method of repairing the ECP tile-finished outer wall of the present invention does not exclude a mode in which the tip of the anchor pin 6 with an injection port is drilled at a depth that does not reach the hollow portion 11.

In the repair method of the present invention, a hole for bleeding air can be provided at an end portion or the like in the floating region. The air bleeding hole is for releasing the gas inside when the injection material is injected and suppressing co-floating, etc., and the anchor pin is not inserted or the injection material is not injected. In the case of floating repair of a tile-finished outer wall, a hole for bleeding air may be provided in either a tile or a joint, but it is preferable to provide a hole in the joint because it is easy to fill the hole after construction.

In the repair method of the present invention, the distance between the holes is preferably 20 cm or more and 35 cm or less. If the distance between the holes is less than 20 cm, the number of holes to be drilled increases, and it takes time and effort for construction. When the distance between the holes is larger than 35 cm, the amount of the injection material to be injected into one hole becomes large, and it becomes difficult for the injection material to spread in a circle centered on the holes. Further, although it is easy to provide the plurality of holes at the apex positions of the quadrangles on the top, bottom, left and right, the arrangement is not limited to this, and for example, the holes may be provided at the apex positions of the triangle. it can.

"Anchor pin fixing process"
After removing dust that hinders adhesion from the inside of the hole 5 with compressed air or the like, the anchor pin 6 with an injection port is screwed into the hole 5. The effective diameter of the anchor pin 6 with an inlet is substantially equal to the diameter of the hole 5, and the anchor pin 6 is fixed to the hole 5 by a screw thread.

Here, a schematic view of the anchor pin 6 with an injection port according to the first embodiment and a 90-degree rotation cross-sectional view of the anchor pin with an injection port shown in this schematic view are shown in FIGS. 3 (a) and 3 (b), respectively. The anchor pin 6 with an inlet has a screw shape including a head portion 61 and a screw portion 62, and has a thread 63 on the side surface of the screw portion 62. The anchor pin 6 with an injection port is formed with a resin injection path P for connecting the injection port 64 provided in the head 61 and the openings 65A to D provided on the side surface of the screw portion 62. The openings 65A to D are provided between the threads 63 so as not to penetrate the threaded portion 62. By providing the openings 65A to D in this way, the screw thread 63 is not divided by the openings 65A to D, and the anchor pin 6 with an injection port can be easily screwed into the hole 5.

"Adhesion process"
The injection material 4 is injected from the injection port 64 of the anchor pin 6 with an injection port using a manual injector or the like. The injection material 4 flows out from the openings 65A to D through the resin injection path P, and diffuses in a circular shape in the floating region centering on the hole 5. At this time, the injection material may cause co-floating around the holes. In the repair method according to one embodiment, since the hole 5 is perforated in the central portion of the tile 3 which is harder than the joint, it is possible to prevent the tile and the joint from cracking even if co-floating occurs. In the tile-finished outer wall repair method, the perforated portion of the hole is not limited. When the tile is perforated, it is possible to prevent the tile and the joint from cracking due to co-floating as described above, but the color tone of the tile and the decorative cap may be slightly different, which may spoil the aesthetic appearance. Therefore, when emphasizing the aesthetic appearance after repair, a hole may be drilled in the joint.

As the injection material, as long as it has sway denaturation (thixotropic property) and a viscosity that does not run off in the float, it should be used without particular limitation using an epoxy resin, an acrylic resin, or the like. Can be done. As the injection material, a high-viscosity type specified by JIS A6024 is preferable because it diffuses slowly in the float and can spread upward against gravity. Further, among the high-viscosity types, those having a slump property of 3.0 or less according to JIS A6024 are more preferable, those having a slump property of 1.0 or less are more preferable, and those having a viscosity conforming to JIS K6833 is 21000 mPa · s or more and 35000 mPa. -S or less (medium viscosity type is 5000 to 20000 mPa · s) is most preferable because it is excellent in rock denaturation. As a high-viscosity injection material excellent in such shaking denaturation, a commercially available material can be appropriately used. Since the high-viscosity type has a slow diffusion and tends to have a large co-float immediately after injection, it is preferable to perforate a hole in the center of the tile.

In the repair method according to one embodiment, the injection material 4 is injected in an amount capable of filling a circular region having a diameter of 30 cm, which is the same diameter as the distance between the holes 5, centering on the holes 5. In the repair method according to one embodiment, the injection material is diffused into a region having a diameter of 30 cm centered on six holes provided at intervals of 30 cm with respect to a floating region of ^{0.54 m 2 (= 90 cm × 60 cm).} The injection area where the injection material is diffused is 0.424 m ² (= 15 cm × 15 cm × π × 6). Therefore, in the repair method which is one embodiment, the adhesion ratio is 78.5% (= 0.424 / 0.54). Since the adhesion ratio stipulated in the Architectural Institute of Japan (JASS) "Standard Specifications for Building Work and Explanation JASS19 Ceramic Tiled Work" is 60% or more, the repair method, which is one embodiment, is sufficient. It is possible to repair the floating area and prevent the tiles from peeling off. In reality, since the stress concentration is relaxed by the presence of the uninjected region in which the injection material does not exist, the effect of suppressing peeling is higher than when the injection material is filled in the entire surface of the floating region. However, according to the request of the owner or the like, for example, the injection material is injected so as to form a circular region (4'in FIG. 2) having a diameter of about 10 cm by drilling in the substantially center of the quadrangle having the hole 5 as the apex. Thereby, the uninjected region can be reduced and the adhesion ratio can be further increased.

Finally, the injection material 4 protruding from the hole 5 is removed, and a decorative cap 7 baked in a color similar to that of the tile is driven into the opening of the hole using a plastic hammer or the like. In addition, the air vent holes are backfilled as necessary.

"Anchor pin with inlet"
FIG. 4 shows a schematic view of the anchor pin 60 with an injection port, which is the second embodiment. In the anchor pin 60 with an injection port according to the second embodiment, the same member as the anchor pin 6 with an injection port according to the first embodiment is designated by the same reference numeral.
The anchor pin 60 with an injection port according to the second embodiment has a pointed tip, and the threaded portion 62 has a first threaded area 621 having a first threaded thread 631, a flat area 623 without a threaded thread, and the like. It consists of a second threaded area 622 with a second threaded thread 632, with openings 65A, B located within the flat area 623. The openings 65A and B are provided so as to penetrate the threaded portion 62. By providing the opening so as to penetrate the threaded portion, the number of drilling steps can be reduced.

Here, the anchor pin with an injection port of the present invention is used by being fixed to a hole. Therefore, in the repair method of the present invention, when the depth position of the opening and the depth position of the float in the anchor pin with the injection port deviate from each other, a high pressure is applied to inject the injection material flowing out from the opening into the float. Since it is necessary, it takes time to inject, and the amount of the injection material protruding from the pores may increase.

In the anchor pin 60 with an injection port according to the second embodiment, even if the depth positions of the openings 65A and B and the floating depth position in the depth direction are slightly different, the injection material flowing out from the openings 65A and B is a flat region. The injection material can be injected into the float along the groove formed by 623 or the second thread 632. In the anchor pin with an injection port according to the second embodiment, the length of the flat region in the axial length direction is preferably 5 mm or more, more preferably 10 mm or more, and more preferably 15 mm or more. ..

In the anchor pin with an injection port according to the second embodiment, it is preferable that the first thread 631 is provided so as to make one or more turns of the threaded portion 62. By providing the first screw thread 631 so as to make one or more turns of the threaded portion 62, the amount of the injection material protruding from the hole portion at the time of injection can be reduced. Further, by having the first screw thread 631, the anchor pin 60 with an injection port, which is the second embodiment, is hard to come off, and the bending strength is improved by increasing the moment of inertia of area. The first thread 631 is more preferably 1.2 turns or more, and more preferably 1.5 turns or more.

The anchor pin with an inlet of the present invention is not limited to the first and second embodiments shown in FIGS. 3 and 4. For example, in the anchor pin with an injection port of the present invention, the tip thereof can be a flat tip, a pointed tip, a round tip, a groove tip, a cutting edge tip, or the like, and the shape of the opening can be a slit shape. Further, in the anchor pin with an injection port of the present invention, the number of openings and the opening direction are not particularly limited, but it is preferable that the opening directions are a plurality of directions from the viewpoint of diffusivity of the injection material, and the opening direction is preferably from the viewpoint of strength. The number is preferably 4 or 2.

In the anchor pin with an injection port of the present invention, it is preferable that the opening is provided in a range of 5 mm or more and 20 mm or less from the end portion on the head side. Since the thickness of the tile used for the outer wall is generally 7 mm or more and 12 mm or less, the opening is located in the range of 5 mm or more and 20 mm or less from the end on the head side, so that between the tile and the mortar attached. The injection material can be efficiently injected into the float generated between the sticking mortar and the extruded cement plate, or both, and the injection material can be prevented from flowing out into the hollow portion. ..

1 Extruded cement plate 11 Hollow part 2 Tension mortar 3 Tile 4 Injection material 4'Injection material 5 Hole part 6 Anchor pin with injection port 61 Head 62 Thread part 63 Thread 64 Injection port 65 Opening P Resin injection path 7 Cosmetic cap

60 Anchor pin with inlet 621 according to the second embodiment 622 First threaded area 622 Second threaded area 623 Flat area 631 First threaded thread 632 Second threaded thread

Claims (9)

A drilling process that drills a hole in the area where the outer wall is floating,
An anchor pin with an injection port, which has a screw shape including a head and a screw portion and has a resin injection path for connecting an injection port provided on the head and an opening provided on a side surface of the screw portion, is described above. Anchor pin fixing process to fix to the hole,
An bonding step of injecting an injection material from the injection port, injecting the injection material into the floating region through the opening, and adhering the floating.
A repair method characterized by being equipped with. The repair method according to claim 1, wherein the outer wall is an extruded cement plate tile-finished outer wall. The repair method according to claim 2, wherein the hole is drilled in the center of the tile. The repair method according to any one of claims 1 to 3, wherein the injection material has a high viscosity type defined by JIS A6024. The repair method according to any one of claims 1 to 4, wherein a plurality of holes are perforated at intervals of 20 cm or more and 35 cm or less. It has a screw shape with a head and a screw part.
An anchor pin with an injection port, which has a resin injection path for connecting an injection port provided on the head and an opening provided on a side surface of the screw portion. The anchor pin with an injection port according to claim 6, wherein the opening is provided in a range of 5 mm or more and 20 mm or less from the end portion on the head side. The threaded portion has a flat region without threads and
The anchor pin with an inlet according to claim 6 or 7, wherein the opening is located in a flat region. The threaded portion is composed of a first threaded area having a first thread, a flat area without a thread, and a second threaded area having a second thread from the head side.
The anchor pin with an inlet according to any one of claims 6 to 8, wherein the opening is located in a flat region.

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