JP3090238U - Nozzles for concrete crack repair equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To ensure that a nozzle is fixed and to inject a filler at a high pressure. SOLUTION: An inner pipe 20 to which a filler is fed, an outer pipe 22 loosely fitted to the inner pipe 20, and an outer pipe 22 which is externally fitted to the inner pipe 20 on the tip side from the tip of the outer pipe 22 and bulges into the hole. A first elastic ring 26 that can be in contact with, a second elastic ring 27 that is fitted to the inner pipe 20 closer to the base end than the base end of the outer pipe 22 and that can swell and elastically contact the hole; The second elastic ring 27 and the outer pipe 22 are stoppered by screwing and screwing into a stopper member 21 for holding the ring 26 and a male screw 29 formed on the inner pipe 20 on the base end side of the second elastic ring 27. Nut 3 that moves to the 21 side to swell the second elastic ring 27 and the first elastic ring 26
0, and in a state where the first and second elastic rings 26 and 27 are elastically contacted with each other, the filler is supplied to the inner discharge port 2 of the inner pipe 20.
3 through the outer discharge port 25 of the outer pipe 22.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a nozzle for a repair device for a concrete crack which fills and repairs a concrete crack formed on a wall of a concrete building with a filler, and in particular, is inserted into a hole previously drilled in the concrete crack to flow. TECHNICAL FIELD The present invention relates to a nozzle for a repair device for a concrete crack that discharges a filling filler.

[0002]

[Prior art]

 Generally, as shown in FIG. 9, as a wall W of a concrete building, for example, an outer wall Wa is formed of concrete, and an inner wall Wb is formed of mortar 1 as concrete via a heat insulating material 2 such as styrene foam. Something you are doing. The example shown in FIG. 9 is an example of a toilet in a building, (a) is a diagram of an inner wall surface, and (b) is a sectional view. In FIG. 9, reference numeral 3 is a window, 4 is a ventilator, and 5 is a toilet paper holder. In such a building, a concrete crack C may be formed on the inner wall Wb including the outer wall Wa due to long-term use. In this case, the concrete crack C is filled with the filling material by a well-known repair device. Repairing. In the case of the inner wall Wb, for example, as shown in FIG. 10, a plastic nozzle 10 is used. The nozzle 10 includes a tubular nozzle body 11 and a flange 12 provided at the tip of the nozzle body 11 and attached to a wall surface with an adhesive. Reference numeral 13 denotes a hollow tank which is connected in the middle of the nozzle body 11 and absorbs an excess filler. Then, a nozzle 10 is previously attached to a plurality of required locations of the crack C with an adhesive via a flange 12, and a hose 14 is connected to the nozzle body 11 of the nozzle 10, and a filler (not shown) The filler is injected into the crack C from the nozzle 10 through the hose 14 by the feeding device. Then, the hose 14 is connected to each of the plurality of nozzles 10 sequentially.

[0003]

[Problems to be Solved by the Invention] In the conventional nozzle 10 for repairing concrete cracks, the flange 12 is attached to the wall surface with an adhesive. The filling pressure can be reduced to about 0.2 MPa (about 2 kg / cm ² ) at most. Therefore, when the width of the crack C is as narrow as about 0.3 mm or less, there is a problem that the filler cannot sufficiently penetrate. In order to solve this, as shown in FIG. 11, it is conceivable to use a metal perforated nozzle 15 and press it against the crack C by hand, but in this case, it is necessary to increase the pressure. Although it is possible, the nozzle 15 is easily detached from the crack C because it is difficult to press it, and the work becomes impossible. The present invention has been made in view of the above problems, and an object of the present invention is to provide a nozzle for a repair device for concrete cracks, in which the fixing of the nozzle is ensured so that the filler can be injected at a high pressure.

[0004]

[Means for Solving the Problems]

 The technical means of the present invention for solving the above-mentioned problem is that a filler for a concrete crack repairing device, which is inserted into a hole formed in a concrete crack and discharges a fluid filler, has a tip closed and the filler And an outer pipe that is loosely fitted to the distal end of the inner pipe and is movable in the axial direction with respect to the inner pipe, and that is externally fitted to the inner pipe distal to the distal end of the outer pipe. A first elastic ring which is pressed in the axial direction and bulges outward to elastically contact the hole; and a first elastic ring which is externally fitted to the inner pipe proximal to the proximal end of the outer pipe and pressed outward in the axial direction. A second elastic ring capable of elastically contacting the hole, a stopper member provided on the inner pipe on the tip side of the first elastic ring to press the first elastic ring, and a second elastic ring; Male thread formed on the inner pipe above the ring The second elastic ring and the outer pipe are moved toward the stopper member by screwing into the stopper member, and the nut is configured to expand the second elastic ring and the first elastic ring. An inner discharge port for discharging the filler fed to the inner pipe is provided in a wall portion of the inner pipe where the outer pipe is located, and a filler discharged from the inner discharge port of the inner pipe is formed in a wall portion of the outer pipe. An outer discharge port for discharging the material is provided.

When a repair is performed by filling a concrete crack formed on a wall surface with a filler by using the nozzle for a repair device having this configuration, first, a hole is formed in a required portion of the concrete crack on the wall. Next, the nozzle for the repair device is inserted through this hole. Then tighten the nut. As a result, the second elastic ring and the outer pipe are moved toward the stopper member, and the second elastic ring and the first elastic ring are swelled and elastically contact the hole. In this state, the inner pipe and the hole are sealed by the first elastic ring on the distal end side of the inner pipe, and the inner pipe and the hole are sealed by the second elastic ring on the proximal end side of the inner pipe. In this state, the filler is fed to the inner pipe of the nozzle by the filler feeder. As a result, the filler is discharged from the inner discharge port of the inner pipe, passes through the gap between the outer pipe and the inner pipe, and is discharged from the outer discharge port of the outer pipe. In this case, the filler is discharged between the first elastic ring and the second elastic ring and injected into the crack. In this case, since the first elastic ring and the second elastic ring are bulged and elastically contact the hole, the inner pipe can be firmly fixed to the hole, and the situation of easily falling out of the hole is prevented. can do. Furthermore, since the inner pipe and the hole are sealed by the first elastic ring and the second elastic ring, it is possible to prevent the filler from penetrating deep into the hole or leaking out of the hole opening. It is possible to reliably inject the filler into the crack. In particular, since the inner pipe can be firmly fixed to the hole and the seal between the hole and the inner pipe can be ensured, the filling pressure of the filling material can be set high, so that it has not been possible conventionally, for example, 0.3 mm or less. The filling material can be injected into cracks of a small degree, and the accuracy and quality of repair can be greatly improved.

[0006] A plurality of the above-mentioned outer discharge ports are provided as needed. The filler can be dispersed and discharged, and the crack can be reliably filled. In this case, it is effective to provide a plurality of the above outer discharge ports at the same position and in an equiangular relationship. The filler can be evenly dispersed and discharged, and the crack can be more reliably filled in the crack. In this case, it is effective to provide a plurality of sets in the axial direction provided at the same positions of the outer discharge ports in an equiangular relationship. The filler can be discharged from the front and back of the wall, and in this regard, the crack can be more reliably filled in the crack. Further, a plurality of the above inner discharge ports are provided as necessary. Since the filler can be dispersed and discharged, the discharge can be ensured.

Further, if necessary, the second elastic ring and the outer pipe are inserted between the second elastic ring and the nut and pushed by the nut to move the second elastic ring and the outer pipe toward the stopper member. At the same time, a configuration is provided in which a frustoconical pressing member that tapers toward the tip is provided. The provision of the truncated-cone-shaped pressing member enables reliable pressing. Further, since the shape is a truncated cone, the inside of the hole can be seen when facing the opening of the hole, so that the repair work can be reliably performed. Still further, if necessary, the second elastic ring is located at the rear end of the second elastic ring, and the second elastic ring is widely separated from the first elastic ring. The extended outer pipe is connected to a second elastic ring at a front position and a front end thereof, and the extended outer pipe can be positioned at two positions of a rear position where the second elastic ring is separated from the first elastic ring by the length of the outer pipe. The configuration is provided. With this, when the depth of the filling material injection is relatively small due to relatively shallow holes, etc., the extended outer pipe is positioned at the rear position, and the depth of the filling material injection is relatively large at relatively deep holes. Sometimes, the extension outside pipe is positioned at the front position. In this case, the filler is discharged between the first elastic ring and the second elastic ring and injected into the crack, and the width of the depth of the injection of the filler is small or large. The equipment can reliably repair and repair concrete cracks, increasing versatility. Further, if necessary, a male screw to which the nut is screwed is joined to the rear end of the inner pipe via a screw means to form a joint member to which a hose of the filler feeding device is connected. I have. The connection of the hose is strengthened and the formation of the male thread is ensured.

[0008]

[Embodiment of the invention]

 Hereinafter, a nozzle for a repair device for a concrete crack according to an embodiment of the present invention will be described with reference to the accompanying drawings. The nozzle N for a concrete crack repairing device according to the embodiment shown in FIGS. 1 to 5 is inserted into a hole H previously drilled in a concrete crack C to discharge a fluid filler. In this nozzle N, reference numeral 20 denotes an inner pipe, from which a filler is fed from a filler feeding device (not shown) through a hose (not shown). A cap-shaped stopper member 21 is fixed to the tip of the inner pipe 20 by welding or screwing, and the tip of the inner pipe 20 is closed. Reference numeral 22 denotes an outer pipe that is loosely fitted on the distal end side of the inner pipe 20 and is axially movable with respect to the inner pipe 20.

On the wall of the inner pipe 20 where the outer pipe 22 is located, an inner discharge port 23 for discharging the filler fed into the inner pipe 20 is provided. A plurality of inner discharge ports 23 are provided at the same position in an equiangular relationship. An outer discharge port 25 is provided on the wall of the outer pipe 22 for discharging the filler discharged from the inner discharge port 23 of the inner pipe 20 and flowing out through the gap 24 between the outer pipe 22 and the inner pipe 20. Have been. A plurality of outer discharge ports 25 are provided at the same position in an equiangular relationship. Also, a plurality of sets provided at the same position of the outer discharge port 25 in an equiangular relationship are provided in the axial direction (two sets G1 and G2 in the embodiment).

Reference numeral 26 denotes a first elastic ring formed of rubber or the like. The first elastic ring 26 is externally fitted to the inner pipe 20 on the distal end side from the distal end of the outer pipe 22, is pressed in the axial direction, bulges outward, and rebounds in the hole H. It is formed to be accessible. Reference numeral 27 denotes a second elastic ring formed of rubber or the like. The second elastic ring is externally fitted to the inner pipe 20 on the rear end side from the rear end of the outer pipe 22, is pressed in the axial direction, bulges outward, and elastically contacts the hole H. It is formed as possible. Reference numeral 28 denotes a joint member to which a hose of the filler feeding device is connected, and is joined to the rear end of the inner pipe 20 via a screw means 28a as shown in FIG. Numeral 30 denotes a nut, which is screwed into a male screw 29 formed on the joint member 28 to move the second elastic ring 27 and the outer pipe 22 toward the stopper member 21 so that the second elastic ring 27 and the first elastic ring 26 are expanded. In this case, since the male screw 29 with which the nut 30 is screwed is formed in the joint member 28, the connection of the hose can be strengthened and the formation of the male screw 29 can be ensured.

Reference numeral 31 denotes a truncated cone-shaped pushing member that tapers toward the tip, and is inserted between the second elastic ring 27 and the nut 30 and pushed by the nut 30 to push the second elastic ring 27 and The outer pipe 22 is moved to the stopper member 21 side. Reference numeral 32 denotes an extended outer pipe, which is externally fitted to the inner pipe 20, has a leading end connected to the outer pipe 22, has a second elastic ring 27 located at the rear end, and has the second elastic ring 27 wider than the first elastic ring 26. 3 and FIG. 8 and the front end is connected to the second elastic ring 27 to separate the second elastic ring 27 from the first elastic ring 26 by the length of the outer pipe 22. The rear position R (FIGS. 2 and 6) can be located at two positions.

Therefore, the concrete crack C formed on the inner wall Wb of the wall W as shown in FIG. 9 is filled with a filler and repaired using the nozzle N for a concrete crack repair device according to this embodiment. When performing, perform as follows. As for the wall W, the outer wall Wa is formed of concrete, and the inner wall Wb is formed of mortar 1 as concrete via a heat insulating material 2 such as styrene foam. The example shown in FIG. 9 is an example of a toilet in a building, (a) is a diagram of an inner wall surface, and (b) is a sectional view. In FIG. 9, reference numeral 3 is a window, 4 is a ventilator, and 5 is a toilet paper holder.

First, as shown in FIG. 6, a case where the depth of the filling material is small is described. A relatively shallow hole H is drilled in advance at a required portion of the concrete crack C on the inner wall Wb. In this case, in the repair device nozzle N, the extension outer pipe 32 is positioned at the rear position R in advance. Next, as shown in FIGS. 4 and 6, the nozzle N is inserted through the hole H. Then, as shown in FIG. 5, the nut 28 is tightened. Thereby, the outer pipe 22 is moved to the distal end side through the truncated cone-shaped push member 31 and the extended outer pipe 32. Then, as shown in FIG. 7, the first elastic ring 26 is pressed by the stopper member 21 at the tip of the outer pipe 22, bulges outward, and elastically contacts the hole H. Then, the second elastic ring 27 is pressed by the extension outer pipe 32 and swells outward to elastically contact the hole H 2. In this state, the inner pipe 20 and the hole H are sealed by the first elastic ring 26 and the second elastic ring 27 on the distal end side of the inner pipe 20. By the first elastic ring 26 and the second elastic ring 27, the presser is made stronger by the pressing, so that the sealing is reliably performed.

In this state, the filler is fed to the inner pipe 20 of the nozzle N through a hose by a filler feeding device (not shown). In this case, the injection pressure of the filler is set to 0.7 to 1 MPa (about 7 to 10 kg / cm ² ). As a result, as shown in FIG. 7, the filler is discharged from the inner discharge port 23 of the inner pipe 20, passes through the gap 24 between the outer pipe 22 and the inner pipe 20, and passes through the outer discharge port 25 of the outer pipe 22. Is discharged from. In this case, since the plurality of inner discharge ports 23 are provided, the filler is diffused and discharged reliably. Further, since the outer discharge port 25 is provided in the wall of the outer pipe 22 and is located at the place where the inner wall Wb is located, the outer discharge port 25 penetrates into the crack C of the inner wall Wb. That is, the filler is injected at a high pressure into a shallow place from the wall surface. Further, at this time, since the plurality of outer discharge ports 25 are provided, the filler is diffused, and the crack C is reliably filled in the crack C. Further, since a plurality of outer discharge ports 25 are provided at the same position in an equiangular relationship, the filler is evenly diffused, and the crack C is more reliably filled. Further, since a plurality of sets (G1, G2) are provided in the axial direction at the same position of the outer discharge port 25 in an equiangular relationship, the filler is discharged from the front and rear of the inner wall Wb. At this point, the crack C is more reliably filled into the inside.

Further, in this case, although the injection pressure of the filler is higher than the conventional 0.2 MPa, the first elastic ring 26 bulges at the tip end side of the inner pipe 20 and is in elastic contact with the hole H. Also, since the second elastic ring 27 is in elastic contact with the hole H at the rear end of the inner pipe 20, the inner pipe 20 is firmly fixed to the hole H, so that the inner pipe 20 easily comes out of the hole H. Is prevented. The inner pipe 20 and the hole H are sealed by the first elastic ring 26 on the distal end side of the inner pipe 20, and the inner pipe 20 and the hole H are sealed by the second elastic ring 27 on the rear end side of the outer pipe 22. Is sealed, so that the filler material is prevented from penetrating into the depth of the hole H or leaking out from the opening of the hole H, and is reliably penetrated into the crack C of the inner wall Wb. Particularly, since the injection pressure is high, even in a narrow place where the width of the crack C is as small as about 0.3 mm or less, the filler material sufficiently penetrates, and the filling is reliably performed.

When the filling of the filler is completed, the nut 28 is loosened, the first elastic ring 26 and the second elastic ring 27 are reduced, and the inner pipe 20 is pulled out from the hole H. In this manner, the nozzles N are sequentially inserted into the holes H formed in advance, and the filler is filled in the same manner as described above. After the nozzle N for the repair device is pulled out, the filler is injected into the hole H using a conventional nozzle as shown in FIG.

Next, a description will be given of a case where the depth of the filling material is large as shown in FIG. First, a relatively deep hole H 2 is formed in a required portion of the concrete crack C on the inner wall Wb. In this case, in the repair device nozzle N, the extension outer pipe 32 is positioned at the front position F. Then, the same operation is performed as described above. At this time, the provision of the truncated cone-shaped push member 31 enables reliable pressing, and since the shape is a truncated cone, the inside of the hole H can be seen when facing the opening of the hole H. Thereby, the filler is discharged between the first elastic ring 26 and the second elastic ring 27 and injected into the concrete crack C. Therefore, it is possible to cope with not only the case where the depth of the injection of the filler is small but also the case where the depth of the injection of the filler is large. And the versatility can be increased. Other operations and effects are the same as those described above.

The length of the nozzle N for the repair device for the concrete crack C according to the above embodiment may be set as appropriate. Further, the nozzle N for the repair device for the concrete crack C according to the above embodiment is applied to the concrete crack C generated on the inner wall Wb of the wall W of the building as shown in FIG. 9, but is not necessarily limited to this. It is a matter of course that the present invention can be applied to cracks generated in any concrete object.

[0019]

[Effect of the invention]

 As described above, according to the nozzle for the repair device for concrete cracks of the present invention, the first elastic ring and the second elastic ring are expanded and elastically contact the holes, so that the inner pipe is firmly fixed to the holes. And it is possible to prevent a situation where the user easily gets out of the hole. Furthermore, since the first elastic ring and the second elastic ring seal the inner pipe and the hole, it is possible to prevent the filler from penetrating deep into the hole or leaking out of the hole opening. As a result, the filler can reliably enter the crack. In particular, since the inner pipe can be firmly fixed to the hole and the seal between the hole and the inner pipe can be ensured, the filling pressure of the filling material can be set high, so that it has not been possible conventionally, for example, 0.3 mm or less. The filling material can be injected into cracks of a small degree, and the accuracy and quality of repair can be greatly improved.

When a plurality of outer discharge ports are provided, the filler can be diffused and discharged, and the crack can be reliably filled in the crack. Further, when a plurality of outer discharge ports are provided at the same position in an equiangular relationship, the filler can be evenly dispersed and discharged, and the crack can be more reliably filled in the crack. Furthermore, when a plurality of sets are provided in the axial direction at the same position of the outer discharge port in an equiangular relationship, the filler can be discharged from the front and rear of the wall, and this point is more reliable. It can be filled in cracks. When a plurality of inner discharge ports are provided, the filler can be diffused and discharged, so that discharge can be reliably performed.

In the case where a frusto-conical pressing member is provided, the second elastic ring and the outer pipe can be reliably pressed toward the stopper member. In addition, since it has a truncated cone shape, it is possible to look inside the hole when approaching the opening of the hole, and the repair work can be performed reliably. Furthermore, when the extension pipe is provided, if the depth of injection of the filler is small due to relatively shallow holes, etc., position the extension pipe at the rear side and fill with relatively deep holes. When the depth of material injection is large, the extension outside pipe can be positioned at the front position, and even if the depth of injection of the filler is small or large, one device can be used. The concrete cracks can be repaired and repaired at the same time, and the versatility can be increased.

In the case where the male screw to which the nut is screwed is formed as a joint member which is joined to the rear end of the inner pipe via a screw means and is connected to the hose of the filler feeding device, The connection can be strengthened, and the formation of external threads can be ensured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a nozzle for a concrete crack repair device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a nozzle for a concrete crack repairing device according to the embodiment of the present invention, showing a state in which an extension outer pipe is positioned at a rear position.

FIG. 3 is a perspective view showing the nozzle for the device for repairing concrete cracks according to the embodiment of the present invention, showing a state in which the extension outer pipe is positioned at the front position.

FIG. 4 is a sectional view showing a front portion of the nozzle for the device for repairing concrete cracks according to the embodiment of the present invention.

FIG. 5 is a sectional view showing a rear portion of the nozzle for the device for repairing concrete cracks according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a state in which the nozzle for the device for repairing concrete cracks according to the embodiment of the present invention is inserted into a hole with the extension outer pipe positioned at the rear side position.

FIG. 7 is a cross-sectional view illustrating a state in which a filler is injected into a nozzle for a concrete crack repair device according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a state in which the nozzle for the device for repairing concrete cracks according to the embodiment of the present invention is inserted into a hole with the extended outer pipe positioned at the front side position.

FIG. 9 shows an example of a wall in which a nozzle for a concrete crack repair device according to an embodiment of the present invention is used;
(A) is a front view of the inner wall, (b) is a sectional view of the wall.

FIG. 10 is a cross-sectional view showing an example of a conventional nozzle for a repair device for concrete cracks in a mounted state.

FIG. 11 is a sectional view showing an example of another nozzle for a repair device for concrete cracks in a state of use.

[Explanation of symbols]

 N Repair device nozzle C Concrete crack H hole F Front position R Rear position W Wall Wa Outer wall Wb Inner wall 1 Mortar 2 Insulating material 3 Window 4 Ventilator 5 Toilet paper holder 20 Inner pipe 21 Stopper member 22 Outer pipe 23 Inner outlet 24 Gap 25 Outer discharge port 26 First elastic ring 27 Second elastic ring 28 Joint member 29 Male screw 30 Nut 31 Push member 32 Extended outer pipe

Claims (8)

[Utility model registration claims] A nozzle for a repair device for a concrete crack, which is inserted into a hole formed in a concrete crack and discharges a fluid filler, wherein an inner pipe whose tip is closed and the filler is fed, An outer pipe that is loosely fitted to the distal end side of the pipe and is axially movable with respect to the inner pipe; and an outer pipe that is externally fitted to the inner pipe at the distal end side of the outer pipe and is axially pressed and swells outward. A first elastic ring resilient to the hole, and a second elastic ring externally fitted to the inner pipe proximal to the proximal end of the outer pipe and pressed in the axial direction to bulge outward and to elastically contact the hole. An elastic ring, a stopper member provided on the inner pipe on the distal end side of the first elastic ring to press the first elastic ring, and a male screw formed on the inner pipe on the base end side of the second elastic ring Screwed into the second A nut for moving the elastic ring and the outer pipe toward the stopper member to swell the second elastic ring and the first elastic ring, wherein the inner pipe has a wall portion where the outer pipe is located. An inner discharge port for discharging the filler supplied to the inner pipe is provided, and an outer discharge port for discharging the filler discharged from the inner discharge port of the inner pipe is provided on a wall of the outer pipe. Nozzle for concrete crack repair equipment. 2. The nozzle for a repair device for concrete cracks according to claim 1, wherein a plurality of said outer discharge ports are provided. 3. The nozzle for a repair device for concrete cracks according to claim 2, wherein a plurality of the outer discharge ports are provided at the same position in an equiangular relationship. 4. The concrete crack repair device nozzle according to claim 3, wherein a plurality of sets are provided in the axial direction at the same positions of the outer discharge ports in an equiangular relationship. 5. The nozzle for a repair device for concrete cracks according to claim 2, wherein a plurality of said inner discharge ports are provided. 6. The second elastic ring and the outer pipe are inserted between the second elastic ring and the nut and pushed by the nut to move the second elastic ring and the outer pipe toward the stopper member, and toward the distal end. 6. The nozzle for a repair device for concrete cracks according to claim 1, further comprising a tapered frustoconical pressing member. 7. A front side in which said second elastic ring is positioned at the rear end of said inner elastic pipe, said distal end is connected to said outer pipe, said distal end is connected to said outer pipe, and said second elastic ring is widely separated from said first elastic ring. An extended outer pipe is provided at two positions, a rear side position where the position and the tip are connected to the second elastic ring and the second elastic ring is separated from the first elastic ring by the length of the outer pipe. Claims 1, 2, 3,
The nozzle for a repair device for concrete cracks according to 4, 5, or 6. 8. A nozzle for a repair device for a concrete crack, which is inserted into a hole formed in a concrete crack and discharges a fluid filler, comprising: an inner pipe whose tip is closed and the filler is fed; An outer pipe that is loosely fitted to the distal end side of the pipe and is axially movable with respect to the inner pipe; and an outer pipe that is externally fitted to the inner pipe at the distal end side of the outer pipe and is axially pressed and swells outward. A first elastic ring resilient to the hole, and a second elastic ring externally fitted to the inner pipe proximal to the proximal end of the outer pipe and pressed in the axial direction to bulge outward and to elastically contact the hole. An elastic ring, a stopper member provided on the inner pipe on the distal end side of the first elastic ring to press the first elastic ring, and a male screw formed on the inner pipe on the base end side of the second elastic ring Screwed into the second And a nut for moving the elastic ring and the outer pipe toward the stopper member to swell the second elastic ring and the first elastic ring, wherein the inner pipe has a wall portion where the outer pipe is located. An inner discharge port for discharging the filler supplied to the inner pipe; an outer discharge port for discharging the filler discharged from the inner discharge port of the inner pipe on a wall of the outer pipe; A plurality of outlets are provided and a plurality of the outer discharge ports are provided at the same position in an equiangular relationship, a plurality of sets provided at the same position of the outer discharge ports in an equiangular relationship are provided in the axial direction, and the inner discharge port is provided. A plurality is provided, inserted between the second elastic ring and the nut, pushed by the nut to move the second elastic ring and the outer pipe to the stopper member side, and tapered toward the tip. Frustoconical push A front position in which the second elastic ring is positioned at the rear end of the inner elastic pipe, the distal end of which is connected to the outer pipe, the second elastic ring is positioned at the rear end, and the second elastic ring is widely separated from the first elastic ring. And an extended outer pipe that can be positioned at two rear positions where the tip is connected to the second elastic ring and the second elastic ring is separated from the first elastic ring by the length of the outer pipe, An apparatus for repairing a concrete crack, characterized in that a male screw to which a nut is screwed is joined to a rear end of the inner pipe via a screw means and is formed as a joint member to which a hose of a filler feeding device is connected. Nozzle.