JP2867166B2 - Wall repair method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a method for repairing a wall surface such as a crack or a floating mortar of a building.

(Prior art and its problems) The conventional method for repairing a wall surface simply involves press-fitting a resin for repair into a crack or a floating mortar portion of a wall surface with a gun. However, foreign matter such as dust and moisture enters the cracks and floating mortar, and foreign matter intervenes between the resin and the inner surface of the crack or floating mortar simply by injecting the resin with an injection gun. There is a problem that the bonding strength becomes insufficient, and fine cracks and gaps remain and even after repair, rainwater etc. penetrates into the interior due to capillary phenomenon and the cracks and floating mortar parts are enlarged, and the repair effect is insufficient. there were. In addition, even if an attempt is made to clean the inside of the crack or the floating mortar, if water enters the crack or the floating mortar, it does not dry forever and weakens the bonding strength of the injected resin, which has been a bottleneck for repair work.

(Object of the Invention) The present invention has been made in view of the problems of the prior art described above, and its object is to clean the inside of a repaired portion such as a crack or a floating mortar to thereby improve the inner surface of the crack or the floating mortar. It is an object of the present invention to provide an epoch-making method for repairing a wall surface capable of sufficiently increasing the bonding force between the resin and the filling resin.

(Means for Solving the Problems) In order to solve the problems of the conventional example, the method for repairing the wall according to the present invention is described as follows. A pilot hole (37) passing through the floating mortar portion (36) is drilled, and high pressure air is injected into the pilot hole together with water spray to form a hole in the pilot hole (37) and the back of the floating mortar portion (36). Gap (4
1) Wash the inside with high pressure, and then insert the repair pipe (38) into the pilot hole (37) and pass the moisture or moisture curable resin (9) through the repair pipe (38) into the pilot hole (37) and the above. Inject into the gap (41).

In claim (2), high-pressure cleaning is performed by injecting high-pressure air together with water spray into the crack (60) on the wall, and then the depth and width of the crack (60) are reduced. After the measurement, the repair pipe (38) is inserted into the crack (60), and the moisture or moisture curable resin (9) is injected through the repair pipe (38).

It employs the technical means of:

(Action) Insert the cleaning pipe (61) into the prepared hole (37) or crack (60) drilled in the floating mortar (36) on the outer wall (C) of the building (or clean the crack (60)) In this case, without using the cleaning pipe (61), directly apply the tip nozzle of the air gun (62) to the crack (60), and inject high-pressure air including water spray into the crack (60).) At the same time, pressurized air is injected with an air gun (62) to clean foreign matter such as dust inside the pilot hole (37) and the gap (41) inside the back of the floating mortar (36) and inside the crack (60), and to the outside. Let out. (In addition, in the case of cleaning the crack (60), the gauge (63) is inserted into the crack (60), the depth is measured, and the width is measured to roughly calculate the required amount of the filling resin (9). Then, a pilot hole (37) is drilled in the crack (60).) A hollow repair pipe (38) is inserted and fixed in the pilot hole (37), and the nozzle of the resin injection gun (A) is fixed. The part (13) is pressed against the opening of the repair pipe (38) and the trigger (6) is pulled. Then, the compressed air from the pneumatic source branches and flows into the air circulation hole (17) and the bottom of the cartridge (b). The compressed air that has flowed into the air flow holes (17)
The piston (2) is advanced through the operating part (7) into the cylinder (1) against the compression coil spring (12a). At the same time, the compressed air that has entered the cartridge (b) pushes up the movable partition (10) and supplies the filling resin (9) to the injection hole (40) in which the piston rod (4) reciprocates. The supplied resin (9) pushes open and close the on-off valve (14) by advancing the piston rod (4), passes through the repair pipe (38), and floats (41) and cracks (41) on the back of the mortar (36). 60) is injected into. The injected resin (9) is a moisture- or moisture-curing resin, so it absorbs residual moisture remaining inside and moisture in the air and hardens to fix the floating mortar (36) or crack (60). Is filled. In this way, the filling of the crack (60) and the repair work of the floating mortar (36) are performed.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. The apparatus for carrying out the method of the present invention mainly includes a compressor (64), a lubricator (65), an air gun (62), a cleaning pipe (61), a gauge (63), a resin injection gun (A), a cartridge (b). ), A hose (64) for connecting these parts is required.

The compressor (64) is for supplying compressed air, and a commercially available compressor is used.

The lubricator (65) is filled with water, and a small amount of water is sucked by the passage of compressed air, and serves as a spray to be ejected from the tip of the washing pipe (61).

The air gun (62) blows out compressed air from its tip when the trigger is triggered.

The cleaning pipe (61) is used by being screwed to the tip of an air gun (62), and has a cross-shaped ejection hole (62a) drilled at the tip, and is further screwed with a shielding disk (62b). ing. An adjusting screw (62c) is screwed to the shielding disk (62b) to adjust the clearance with the wall surface as shown in FIG. (Or, in the case of cleaning a crack (60), use a cleaning pipe (6
Without using 1), directly apply the tip nozzle of the air gun (62) to the crack (60), and inject high-pressure air containing water spray into the crack (60). The gauge (63) is just a thin rod and cracks (60)
Some measure the depth of a crack, while others measure the width of a crack (60) with a scale like a ruler.

The gun body (a) of the resin injection gun (A) has a cylinder portion (3) in which a piston (2) is reciprocally movable.
And a piston (2) extending from the cylinder portion (3).
An injection cylinder (5) containing a piston rod (4) reciprocating with the piston (2) and being connected to the cylinder (1) is connected to a pneumatic source when the trigger (6) is pulled. And an operating portion (7) from which the rod (4) projects.

In the cylinder section (3), a piston (2) is housed in a reciprocating manner in an internal cylinder (1), and hermeticity is maintained by an O-ring (12). The piston (2) is urged by a compression coil spring (12a) in a direction away from the injection cylinder (5) (that is, toward the back of the gun body (a)).

The injection cylinder part (5) extends from the cylinder part (3) and is connected to the piston (2).
A piston rod (4) reciprocating with the piston is housed. A nozzle (13) is screwed to the tip.
In this nozzle part (13), a ball-shaped on-off valve (14)
An opening / closing spring (15) for urging the opening / closing valve (14) in the direction of the cylinder (1) (right side in the figure) is housed therein, and the opening / closing valve (14) is constantly pressed to the valve seat (16) to open the valve. The seat (16) is closed. The nozzle portion (13) has a tweezer-shaped tip and is usually made of resin, but may be made of metal.

The actuating portion (7) abuts on the handle (18) having an air flow hole (17) formed therein, the trigger (6) pivotally pivoted at one end, and the trigger (6). The air circulation hole (1
7) and a trigger action part (19) for opening and closing. The trigger action portion (19) is configured to slide between a valve housing (21) screwed into an action hole (20) and a slide hole (22) drilled in the valve housing (21). Pin (23),
The operation block (24) and the operation block (24) and the position between the operation block (24) and the valve housing (21) are screwed to the slide pin (23) and contact the trigger (6) to transmit the movement of the trigger (6). A trigger spring (25) disposed to urge the operating block (24) away from the valve housing (21)
It is composed of The air circulation hole (17)
The cylinder (1) passes through an air flow gap (26) formed between the sliding pin (23) and the valve housing (21) and an opening / closing hole (27) formed in the valve housing (21). linked.

The cartridge (b) is housed in a cartridge case (28). The cartridge case (28) is a cylinder screwed to the injection cylinder (5), and has a cartridge lid (29) screwed to the bottom. A disk packing (30) is provided on the inner surface of the bottom of the cartridge lid (29), and a cylindrical projection (31) is provided in the center of the disk packing (30) so as to project inward. Further, a branch pipe (32) communicating with the cylindrical projection (31) is connected to the bottom of the cartridge lid (29). The branch nipple (33) communicating with the branch pipe (32) is connected to the handle (18). ) Air flow holes (17)
Connected to the supply nipple (34).

The cartridge (b) has a cylindrical shape and its bottom is open, and the inside is filled with a filling resin (9), and is pushed out by the movable partition (10). A connecting cylinder (50) is provided at the tip of the cartridge (b), and is mounted in a connection hole (35) of the injection cylinder (5) via a cartridge connecting fitting (52). ,
The bottom of the cartridge (b) housed in the cartridge case (28) is tightly pressed and supported by the disk packing (30) of the cartridge lid (29) as shown in FIG. The connection cylinder (50) is cylindrical and is inserted into a straight connection hole (51). (If a screw is screwed into the connection hole (51) and a male screw is screwed into the outer periphery of the connection cylinder (50) and screwed in, it may interfere with the cartridge case (28), (The joint with (29) could be defective.) (53) is a watertight packing. The cartridge connection fitting (52) is connected to the gun body (a), and the connection protrusion (8) communicates with the injection hole (40) of the gun body (a). The connection branch pipe (32) is connected to a pneumatic source via a pressure adjusting device (not shown).

The filling resin (9) is, for example, an epoxy resin, such as a moisture-curable resin that cures in the presence of moisture or a water-curable resin that cures in the presence of moisture. (Of course, it is not limited to these.) However, the floating mortar (3
6) Drill a pilot hole (37) inside the crack or crack (60), then insert a cleaning pipe (61) (if the crack (60) is large enough, drill a pilot hole (37) Compressed air is injected with the air gun (62) together with the water spray by inserting the cleaning pipe (61) as it is or without inserting the tip of the air gun (62) into the crack (60) without using the cleaning pipe (61). Then, foreign substances such as dust in the gap (41) on the back surface of the pilot hole (37) and the floating mortar portion (36) and the inside of the crack (60) are washed and blown out. (Adjustment of the ejection pressure is performed with a normal pressure adjusting device.)
The compressed air is injected into the pilot hole (37) and the gap (41).
The gas enters the inside and the crack (60) with the spray and vigorously, and the foreign matter accumulated in the pilot hole (37), the gap (41) and the crack (60) is washed away. The foreign matter is easily detached from the prepared hole (37) and the inner surface of the gap (41) or the crack (60) by the injected spray, and is ejected to the surface. The ejected foreign matter is shielded by the shielding disk (62b) and does not fly to the operator side.

When the cleaning is completed, if a crack (60) is required, a gauge (63) is inserted into the crack (60) to measure the depth and the width of the crack (60). Approximate amount is calculated.

After cleaning the cracks (60), floating mortar (36) and pilot holes (37), insert the hollow repair pipe (38) into the pilot holes (37) and drive in the fixing pins (39) to repair. The repair pipe (38) is fixed in the pilot hole (37) by splitting the insertion end of the pipe (38). Thereafter, as shown in FIG. 3, the nozzle portion (13) of the resin injection gun (A) is pressed against the opening of the repair pipe (38) to trigger the trigger (6). Then, the compressed air from the pneumatic source branches and flows into the air circulation hole (17) and the bottom of the cartridge (b). The compressed air that has flowed into the air flow hole (17) passes through the operating part (7), and then enters the cylinder (1).
The piston (2) is advanced against the compression coil spring (12a). At the same time, the compressed air that has entered the cartridge (b) pushes up the movable partition (10) and supplies the filling resin (9) to the injection hole (40) in which the piston rod (4) reciprocates. The supplied resin (9) pushes the on-off valve (14) by the advance of the piston rod (4), and passes through the repair pipe (38) or directly through the crack (60) or the back of the floating mortar (36). It is injected into the gap (41).

Since the opening of the repair pipe (38) is coated with resin, when the nozzle portion (13) is made of resin, the adhesion is improved and resin leakage does not occur. Metal nozzle (1
When 3) is used, for example, a waste cloth is interposed between the opening of the repair pipe (38).

The injection amount of the resin injection gun (A) at one time is determined by the moving distance of the piston rod (4) and the diameter of the injection hole (40). In this embodiment, it is about 1 to 4 cc, and the crack ( 6
Depending on the size of the gap (41) of the floating mortar (36), the trigger (6) must be pulled many times to increase the injection volume. A counter (42) may be provided to count the number of times the trigger (6) is pulled, so that the injection amount can be calculated. The injected resin (9) absorbs moisture in the air and residual water during cleaning and hardens, filling the crack (60) and fixing the floating mortar (36). In this way, the filling work of the crack (60) and the repair work of the floating mortar (36) will be performed.

When the trigger (6) is loosened, the trigger spring (25)
As a result, the trigger (6), the operating block (24) and the sliding pin (23) are pulled back, and the end of the valve housing (21) and the end of the sliding pin (23) move the opening / closing packing (43). The air flow hole (17) is closed by the intermediary, the supply of compressed air to the cylinder (1) is stopped, and the piston (2) is pushed back by the elastic force of the compression coil spring (12a).

(Effect) In the method for repairing a wall surface of the present invention, high-pressure air is injected together with water spray into a gap or a crack or a lower hole of a back surface of a floating mortar portion of a wall to wash the inside of the gap or the crack with a high pressure.
Foreign matter that hinders the adhesion between the filling resin and the inner surface of the gap or the inner surface of the crack is washed away and cleaned, and then a repair pipe is inserted into the gap or the crack, and the moisture or moisture-curable resin is passed through the repair pipe into the gap. Or the cracks, the moisture or moisture curable resin absorbs the residual water in the interior or the moisture in the air and cures, and as described above, the foreign substances are washed out and the original adhesiveness of the filled resin is exhibited. As a result, there is no disadvantage such as invasion due to the capillary action of water due to poor adhesion unlike the related art.

In addition, since the depth and width in the crack are measured after high-pressure cleaning in the crack, the amount of resin required for filling can be calculated in advance,
After that, since the humidity or moisture-curable resin is injected through the repair pipe inserted into the crack, the resin injection can be performed accurately and without a shortage of appropriate amount of skilled workers. There is an advantage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of an air gun used in the present invention. FIG. 2 is an explanatory view of a use state of a depth measuring gauge used in the present invention. FIG. 3 is a resin injection gun used in the present invention. Cross section resin injection gun (A), gun body (a), cartridge (b), building (c), cylinder
(1), cylinder (1a), piston (2), cylinder (3), piston rod (4), injection cylinder (5), trigger (6), Working part ...
(7), connection protrusion (8), filling resin (9), moving partition (10), O-ring (12), compression coil spring (12a), nozzle (13) ), Open / close valve ... (1
4), Nozzle part ... (13), Ball-shaped on-off valve ... (1
4), closing spring (15), valve seat (16), air flow hole (17), trigger action part (19), action hole (2)
0), valve housing (21), sliding hole (22), sliding pin (23), operating block (24), trigger spring (25), air flow gap ... (26), opening / closing hole (27), cartridge case (28), cartridge lid (29), disk packing (30), cylindrical protrusion ...
… (31), branch pipe …… (32), branch nipple …… (3
3), Supply nipple (34), connection hole (35), floating mortar on outer wall (36), pilot hole (37), repair pipe (38), fixing pin ... (39), injection hole ...
(40), gap on the back of the floating mortar… (41), counter… (42), crack… (60),

────────────────────────────────────────────────── (5) References JP-A-59-38462 (JP, A) JP-A-60-92562 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 23/02

Claims (2)

(57) [Claims] A floating hole is formed in a floating mortar portion formed on a wall surface, and a pilot hole is formed through the floating mortar portion from the wall surface. A method for repairing a wall surface, comprising washing a gap in a back surface with high pressure, subsequently inserting a repair pipe into a pilot hole, and injecting a moisture-curable resin into the pilot hole and into the gap through the repair pipe. 2. A high-pressure air is injected into the crack on the wall together with water spray and high-pressure washing is performed. Then, a depth and a width in the crack are measured, and a repair pipe is inserted into the crack. A method for repairing a wall surface, which comprises injecting a curable resin.