JP2007284937A - Fall preventing structure and fall preventing method for existing finished wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fall preventing structure and a fall preventing method for an existing finished wall enabling a reduction in construction period, preventing the finished wall from being discolored for a long period while maintaining the feeling and aesthetic appearance of the wall at the time of construction, and having high durability and reliability. <P>SOLUTION: This fall prevention structure for the existing finished wall comprises an anchor pin with a filler port inserted into a hole formed in the finished wall with at least the end of which buried in a skeleton, an epoxy resin or an acrylic resin injected between the surface of the skeleton and the existing finished wall from the filler port, and a permeable acrylic resin emulsion coated layer into which short fibers formed on the surface of the finished wall are mixed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fall prevention structure for an existing finish wall and a fall prevention method for preventing an existing finish wall such as a tile from falling.

The tiled wall, which is a typical example of a finished wall of a building or a structure, on average, exhibits deformations such as cracks and floats from around 13.6 after construction.
Cracks in the tiles on the surface of the finished wall have a significant effect on the useful life of buildings and structures, due to water leakage and, in turn, a decrease in yield strength due to the neutralization of the concrete frame.
Similarly, the floating of the tile may lead to a serious accident such as death or injury due to the peeling of the tile.
Furthermore, when the reinforcing bars in the enclosure are corroded, the enclosure surface rises and the upper part of the enclosure builds up with the existing finished wall, which can lead to a major accident.

Therefore, conventionally, various methods for preventing falling of existing finished walls have been adopted.
In Japanese Patent Laid-Open No. 10-115101, an anchor hole penetrating the inside of the casing is drilled in a required portion of the tile covered with the casing, and the anchor hole is almost at the opening edge of the anchor hole formed on the tile surface. After pasting a masking tape with the same diameter or a slightly larger through hole, insert an anchor pin with a rough outer periphery into the anchor hole, and the tip of the anchor pin is about 1/2 of the tile thickness Immerse it so that it is located at the site, fix it with an adhesive, then fill the anchor hole with a grout material blended with the same color pigment as the tile to be repaired, close the opening, and then A technique for peeling the attached masking tape is disclosed.
JP-A-10-115101

In addition, in JP 09-177328 A, in a building outer wall having a finished surface of a foundation outer wall, a layer of latex mortar as a base material is formed on the surface of a portion where peeling occurs due to the floating of the tile, A net is arranged on the upper surface of the latex mortar, and a lightweight glass fiber concrete plate is again arranged on the upper surface of the formed latex mortar layer on the surface of the net, and is inserted into a pin hole formed in the glass fiber concrete plate. There is disclosed a technique for fixing the glass fiber concrete plate and the net by pushing a pin having a flange portion into the foundation outer wall.
JP 09-177328 A

Further, Japanese Patent Laid-Open No. 11-303361 discloses the removal of an existing tile by peeling and removing an appropriate number of existing tiles from a group of existing tiles in each predetermined area of an existing tiled wall surface. After creating the recessed part recessed by the above, paste the net on the existing tiled wall surface, the part of this net facing the recessed part is in the ground with the head fitted in the recessed part After fixing to the bottom surface of the recessed portion by the anchor member driven in, and then filling the recessed portion with a filler to form a repair construction surface by the outer surface of the net and the filler Further, a technique is disclosed in which a finishing wall material is laminated on the construction surface for repair and an existing tiled wall surface is covered with a new wall surface.
JP-A-11-303361

Furthermore, Japanese Patent Laid-Open No. 2001-173242 discloses (1) a step of repairing a defective portion of an existing finishing layer (existing mortar, tile finishing outer wall surface, etc.) and adjusting the base (2) for preventing the base from peeling off. The process of adhering / fixing a net (3) The process of adhering an aluminum panel on the net (4) The process of fixing the panel with an anchor pin and the method of repairing the outer wall and roof are disclosed.
JP 2001-173242 A

Furthermore, Japanese Patent Application Laid-Open No. 2002-339578 discloses that the surface of a concrete frame has a building outer peripheral surface covered with a finishing layer such as mortar, and a plurality of anchors are embedded and fixed separately from each other in the concrete frame. A technique for repairing the outer peripheral surface of the building in which a thin protective material having a predetermined width made of a transparent body coated on the outer surface side of the finishing layer is fixed to the outer peripheral surface of the building via the plurality of anchors. It is disclosed.
JP 2002-339578 A

The prior art described in Patent Document 1 requires a repair work for each tile that has been peeled off, so that the work period becomes longer and the cost increases.
Moreover, since all the prior arts described in the above-mentioned Patent Documents 2 to 4 cover a tile that is an existing finished surface with a newly installed tile or the like, a valuable landscape at the beginning of a new building construction is lost.
Furthermore, in the prior art described in Patent Document 5, although the scenery of the outer wall at the time of the new construction is visible through the transparent protective material, the transparent protective material is partially attached and the nut protrudes from the wall. Therefore, the repair was obvious and unsatisfactory in view.

  The present invention shortens the construction period, maintains the texture and landscape of the original wall, and does not change color over a long period of time. The purpose is to provide a fall prevention method.

In order to achieve the above object, the existing finished wall fall prevention structure according to claim 1 of the present invention has the existing finished wall surface coated with a transparent acrylic resin emulsion coating layer mixed with short fibers. Wall fall prevention structure.
The fall prevention structure for an existing finish wall according to claim 2 of the present invention is inserted into a hole formed in the existing finish wall and has an anchor pin with an injection port at least a tip embedded in the case, and the surface of the case from the injection port to the case surface. Prevention of falling of existing finishing wall composed of epoxy resin or acrylic resin injected between existing finishing wall and transparent acrylic resin emulsion coating layer mixed with short fibers formed on the surface of existing finishing wall The structure.
The transparent acrylic resin emulsion coating layer of the existing finished wall fall prevention structure according to claim 3 of the present invention is formed by roller coating or spraying.
The transparent acrylic resin emulsion coating layer in which the short fibers are mixed in the fall prevention structure for the existing finished wall according to claim 4 of the present invention is an acrylic resin emulsion, an acrylic copolymer resin emulsion, an acrylic silicone copolymer resin emulsion. At least one emulsion selected from the group is characterized by being transparent after film formation.
The above-mentioned transparent acrylic resin emulsion having a fall prevention structure for an existing finished wall according to claim 5 of the present invention has a weight ratio of short fibers such as nylon, vinylon, and glass having a length of 3 to 15 mm and a thickness of 1 to 50 μm. It is characterized in that 0.5 to 5% is mixed.
According to claim 6 of the present invention, the method for preventing fall of the existing finished wall is to apply or spray a transparent acrylic resin emulsion mixed with short fibers such as nylon, vinylon, and glass onto the surface of the existing finished wall.
The method for preventing fall of an existing finish wall according to claim 7 of the present invention is to pierce the existing finish wall and the casing, and insert and fix an anchor pin with an injection port until at least the tip is embedded in the casing. Epoxy resin or acrylic resin is injected under pressure from the anchor pin inlet, and the gap between the housing surface and the existing finish wall is filled, and short fibers such as nylon, vinylon, glass, etc. are provided on the existing finish wall surface. The mixed transparent acrylic resin emulsion was applied by roller or sprayed.

According to the invention according to claim 1, since the existing finished wall surface has a fall prevention structure for the existing finished wall covered with a transparent acrylic resin emulsion coating layer mixed with short fibers, the construction period is shortened. Reduces construction costs, maintains the landscape without damaging the texture of the original wall, and provides a durable and reliable fall prevention structure for existing finished walls without discoloration over a long period of time. can do.
According to the second aspect of the present invention, the existing finish wall fall prevention structure of the first aspect of the present invention is further inserted into the hole formed in the existing finish wall, and at least the tip is embedded in the housing Since the attached anchor pin and the epoxy resin or the acrylic resin injected between the housing surface and the existing finished wall from the inlet are added, compared with the invention according to claim 1, the fall prevention structure of the existing finished wall is provided. Durability and certainty can be further improved.
According to the invention according to claim 3, since the transparent acrylic resin emulsion coating layer is formed by roller or spray coating, it corresponds to the shape of various bases including those with irregularities such as tiles. can do.
According to the invention of claim 4, the transparent acrylic resin emulsion coating layer mixed with the short fibers is at least one selected from the group of acrylic resin emulsion, acrylic copolymer resin emulsion, and acrylic silicone copolymer resin emulsion. Since the resulting emulsion became transparent after film formation, the fall of the existing finished wall is highly transparent and does not change color over a long period of time while maintaining the texture and landscape of the original wall. It can be set as a prevention structure.
According to the invention according to claim 5, the transparent acrylic resin emulsion coating layer is made of a transparent acrylic resin emulsion having a fall prevention structure for the existing finished wall, and is made of nylon or vinylon having a length of 3 to 15 mm and a thickness of 1 to 50 μm. Since glass and other short fibers are mixed in 0.5 to 5% by weight, a highly transparent resin coating can be formed, and the tensile strength and tear strength of the coating are improved. The wall landscape can be maintained at a high level.
According to the invention according to claim 6, the fall prevention method for the existing finish wall is to apply or spray a transparent acrylic resin emulsion mixed with short fibers such as nylon, vinylon, glass, etc. on the surface of the existing finish wall. Therefore, shortening the construction period to reduce construction costs, maintaining the scenery without impairing the texture of the initial wall construction, without discoloring over a long period, and having high durability and certainty A fall prevention structure for the finishing wall can be provided.
According to the invention of claim 7, the fall prevention method for the existing finish wall is drilled in the existing finish wall and the housing, and the anchor pin with an injection port is inserted and fixed until at least the tip is embedded in the drilled hole in the housing. Then, an epoxy resin or an acrylic resin is pressure-injected from the inlet of the anchor pin to fill the space between the housing surface and the existing finished wall, and the existing finished wall surface is made of a short material such as nylon, vinylon, or glass. Since the transparent acrylic resin emulsion mixed with the fibers is roll-coated, the durability and reliability of the fall prevention structure for the existing finished wall can be further improved as compared with the invention according to claim 1.

Hereinafter, examples will be described as specific examples of the present invention, but the present invention is not limited to these examples.
<Adjustment of short fiber mixed transparent coating material>
Short fibers 2 such as vinyl resin short fibers, nylon resin short fibers, and short glass fibers having a length of 5 mm and a thickness of 28 μm with respect to 90 parts by weight of a transparent aqueous acrylic silicone resin emulsion having a solid content of 50% that becomes transparent after film formation. Further, 4 parts by weight of a film-forming aid and 4 parts by weight of additives such as a dispersant and an antifoaming agent are added and stirred.
Usually, these short fibers do not become transparent when mixed with a transparent aqueous acrylic silicone resin emulsion.
The present inventors set the length, thickness, and mixing ratio of the short fibers mixed in the transparent aqueous acrylic resin emulsion to a predetermined range, thereby making the coating film transparent, with a predetermined tensile strength, tear strength, The present inventors have found that it is possible to secure an appropriate elongation rate and have a uniform film thickness while having an adhesive force, and the present invention has been achieved.
As the transparent aqueous acrylic resin emulsion, an acrylic homopolymer resin emulsion or an acrylic copolymer resin emulsion can be used in addition to the acrylic silicon resin emulsion.
Of course, these three emulsions can be used alone or in combination of two or more.
In the present specification, the proportions are expressed in weight ratios unless otherwise specified.

As the short fiber material, vinyl resin, nylon resin and glass fiber can be used. Nylon is excellent in flexibility, and the flexibility of the coating film is large. It follows well and can prevent the occurrence of cracking and lifting of the coating film.
Glass fiber is excellent in strength improvement, but since it is thin, if it is used unprocessed, air will enter between the fibers and the transparency of the coating will be poor, so dozens of single fibers The transparency of the coating film can be ensured by binding with an epoxy resin or the like.

  When the fiber length is short, the strength is insufficient, and when the fiber length is long, the fiber becomes fluffy or flutters, resulting in poor finish. Therefore, the fiber length is preferably in the range of 3 to 15 mm, and more preferably in the range of 5 to 10 mm.

The range of the fiber thickness is unfavorable when the fiber is made of vinyl resin or nylon resin, if the fiber is thin, the strength is insufficient, and if the fiber is thick, the fiber comes out on the surface and the coating surface becomes rough.
The lower limit of the fiber thickness is 1 μm made of glass fiber, and the upper limit is about 50 μm made of vinyl resin and nylon resin, preferably 1 to 30 μm.

  If the amount of the short fiber added is large, the tensile strength and tear strength of the coating film are improved, but the elongation is lowered. Therefore, in order to ensure the required strength, the lower limit is set to about 0.5% by weight with respect to the transparent aqueous acrylic resin emulsion, and the flexibility of the coating can be increased to follow the movement of the base. The upper limit is required to be about 5% so that the film does not crack or float off.

The short fiber-mixed transparent aqueous acrylic resin-based emulsion thus prepared is applied to the existing finished wall surface with a short hair roller or a spray gun.
Moreover, since this acrylic resin is an aqueous emulsion that does not use an organic solvent, the working environment can be improved.

<Construction procedure>
FIG. 1 is a partial front view partially showing a fall prevention structure obtained by using the fall prevention method for an existing finish wall according to the present invention, and FIG. 2 is a partial sectional view of the fall prevention structure for an existing finish wall. 3 shows the work procedure of the fall prevention method of an existing finishing wall.

Hereinafter, based on FIG. 3, the work procedure of the construction method for constructing the fall prevention structure for the existing finished wall of the present invention will be described.
First, the surface of the existing finished wall is lightly inspected using a test hammer or the like, the depth to the surface of the housing, cracks, etc. are examined, and the lifted portion of the peeled finished wall is confirmed to mark the portion to be reinforced. In consideration of the weight of the existing finish wall, about 4 anchor pins 4 per square meter are appropriate.
Next, using a vibration-free electric drill, drilling 6 is performed at a right angle to the tile 2 until the housing 1 is reached according to the marking described above. Next, in order to accommodate a decorative cap 5 described later, so-called two-stage digging is performed in which a shallow hole 7 having a diameter larger than the hole diameter is formed.
Next, chips in the perforations that hinder adhesion with compressed air or the like are removed.
Thereafter, an anchor pin with an injection port is inserted into the hole by 20 mm or more into the hole, and an extension (not shown) is driven with a dedicated driving rod to widen the distal end portion and fix to the housing 1.
As shown in FIG. 2, the anchor pin 4 with an inlet has a base end as an inlet, a slit (not shown) is provided in the middle of the hollow shaft in the axial direction, and an extension is incorporated. In addition, three C-shaped rings 8 that bite into the housing 1 when the tip portion is expanded by an extension have a structure provided at the tip portion.

Next, the epoxy resin which does not contain a short fiber is gradually filled from the injection port of an anchor pin using a manual injector. In addition, when the existing finishing wall such as a tile is lifted, as shown by a circle in FIG. 1, it is poured until the floating portion 9 is filled with epoxy resin.
When filling is completed, a cosmetic cap in which the inlet is baked in the same color as the tile is driven in and attached using a plastic hammer or the like. The reason why the makeup cap is the same color as the tile is to make it difficult to visually confirm that the repair work has been carried out, and to keep the texture and landscape of the building and structure, and not to lower its value.
In the above description, the anchor pin with injection port is driven into the housing, and the epoxy resin is injected and filled between the housing and the existing finished wall. However, the epoxy resin may be an acrylic resin. Further, the anchor pin with an injection port is driven almost in the center of the tile, but the same effect can be obtained even when driven into the tile joint.
Furthermore, when the state of the frame and the existing finished wall is good, the above-described drilling and resin injection steps are not necessary and may be performed from the next step. The construction method at this time is the invention according to claim 6, and the existing finished wall fall prevention structure constructed thereby is the invention according to claim 1.

As a pretreatment for applying the short-fiber mixed transparent aqueous acrylic resin emulsion to the existing finished wall surface, the outer wall tile surface is washed with high-pressure water washing or the like.
After washing and drying, in order to increase the adhesion of the short fiber mixed transparent coating material, a solvent-type transparent acrylic resin-based sealer that does not contain short fibers is applied to the existing finished wall surface with a roller, brush, etc., at about 0.15 Kg / m. ^{2 is} applied to form an undercoat layer (first layer).
Specifically, the resin of the coat sealer was prepared by blending the acrylic silicone resin varnish 13 as a base with the acrylic silicone resin catalyst solution 1 as a curing agent.

Next, the short fiber-containing transparent aqueous acrylic silicone resin emulsion, which has already been described in the section <Preparation of short fiber-containing transparent coating material> in paragraph 0012, is characterized by the fact that the short-fiber-containing transparent aqueous acrylic silicone resin emulsion is characteristic of the present invention. About 0.4 kg / m ^{2 is} applied with a short hair roller, rubber spatula, spraying, etc. so that the thickness is uniform, and an intermediate coating layer (first time) is formed.
After the intermediate coating layer (first time) is dried, preferably during the middle day, the emulsion is applied with a short hair roller, rubber spatula, spraying, etc. to form 0.3 to 0.4 kg / m ² to form the intermediate coating layer (second time). To do.
The two coated layers of the short fiber mixed transparent aqueous acrylic resin emulsion are dried to form a transparent acrylic resin emulsion coating layer.
Next, after drying the intermediate coating layer (second time), preferably a weak solvent-type transparent acrylic resin topcoat containing no short fibers is applied with a roller, a brush, or the like for 1 day.
Specifically, the top coat resin was prepared by blending the acrylic silicone resin varnish 11 with 2% additive as a base and the acrylic silicone resin catalyst solution 1 as a curing agent.
The gloss of the top coat can be gradually reduced by increasing the amount of additive added.
The coating amount at this time is 0.2 to 0.3 Kg / m ² , but it is applied twice to blend with the transparent acrylic resin emulsion coating layer and protect the film layer over a long period of time. It is desirable to do.

  The fall prevention structure for the existing finish wall, which has been repaired by the fall prevention method of the present invention described above, is a hole drilled in a substantially central portion of the tile 2 as the existing finish wall, as mainly shown in a sectional view in FIG. 6, an anchor pin 4 with an injection port whose tip is embedded in the housing 1 by 20 mm or more, and an epoxy resin or an acrylic resin 10 injected between the housing surface 1 and the existing finishing wall 2 from the injection port Further, the present invention relates to a transparent acrylic resin emulsion coating layer 11 in which short fibers formed on the surface of the existing finishing wall 2 are mixed.

Action

The transparent acrylic resin emulsion coating layer 11 mixed with the short fibers formed on the surface of the existing finished wall has a tensile strength, by short fibers such as vinyl resin short fibers, nylon resin short fibers, and glass short fibers mixed therein. The tear strength is strengthened, it adheres firmly to the surface of the existing finished wall 2, and the transparent acrylic resin emulsion coating layer 11 itself mixed with short fibers creates a state in which the existing finished wall 2 is integrated. The transparent acrylic resin formed on the surface of the finished wall where the coating layer has not yet been peeled off even if a part of the provisional existing finished wall 2 is peeled off from the housing 1 due to the structure. The film is not torn off unless it is torn with the system emulsion coating layer 11 and broken.
Further, when the anchor pin 4 with injection port is driven into the housing 1, the anchor pin 4 with injection port presses the existing finishing wall 2 against the surface of the housing by the anchor action and supports the existing finishing wall 2 in a suspended manner. The existing finish wall 2 can be prevented from peeling off in cooperation with the acrylic resin emulsion coating layer 11.

It is a partial front view which shows the fall prevention structure of the existing finishing wall of this invention. It is a fragmentary sectional view which shows the fall prevention structure of the existing finishing wall of this invention. The work procedure of the fall prevention method of the existing finishing wall of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Finish wall material 3 Mortar 4 Anchor pin with an inlet 5 Cosmetic cap 9 Floating part 10 Filled epoxy resin 11 Transparent acrylic resin emulsion coating layer

Claims (7)

The existing finished wall surface is covered with a transparent acrylic resin emulsion coating layer mixed with short fibers to prevent falling of the existing finished wall. An anchor pin with an injection port that is inserted into a hole formed in an existing finish wall and at least the tip is embedded in the housing;
An epoxy resin or an acrylic resin injected between the housing surface and the existing finishing wall from the inlet,
A transparent acrylic resin emulsion coating layer mixed with short fibers formed on the existing finished wall surface;
The fall-prevention structure for the existing finishing wall constructed by The fall prevention structure for an existing finish wall according to any one of claims 1 to 2, wherein the transparent acrylic resin emulsion coating layer is formed by roller coating or spraying. The transparent acrylic resin emulsion coating layer in which the short fibers are mixed is composed of at least one emulsion selected from the group consisting of an acrylic resin emulsion, an acrylic copolymer resin emulsion, and an acrylic silicone copolymer resin emulsion. The fall prevention structure for an existing finish wall according to any one of claims 1 to 3, wherein The transparent acrylic resin emulsion is characterized in that short fibers such as nylon, vinylon, glass and the like having a length of 3 to 15 mm and a thickness of 1 to 50 μm are mixed in a weight ratio of 0.5 to 5%. The fall prevention structure of the existing finishing wall of Claim 4.   A method for preventing fall of an existing finished wall, characterized in that a transparent acrylic resin emulsion mixed with short fibers such as nylon, vinylon or glass is roller-applied or sprayed onto the surface of the existing finished wall. Drill into the existing finished walls and housing,
Insert and fix the anchor pin with the inlet until at least the tip is embedded in the housing,
Pressure injection of epoxy resin or acrylic resin from the injection port of the anchor pin, filling the gap between the housing surface and the existing finish wall,
A method for preventing falling of an existing finished wall, characterized in that a transparent acrylic resin emulsion mixed with short fibers such as nylon, vinylon, glass, etc. is applied to a roller or sprayed onto the surface of the existing finished wall.

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