Concrete structure repair equipment

Abstract

To provide a concrete structure repair device, which can be easily set up on a small-width surface of a concrete structure, hardly moves away from the surface during its nozzle body discharging a filler, and can securely fill the filler.SOLUTION: An injector T is provided comprising: a body 10 which is arranged along the surface direction of a side surface 3 of a concrete structure C with an exposed crack W and has an inlet port 11 for a filler F at its one end; and a nozzle body 14 which is protrusively arranged at the other end side of the body 10 to discharge the filler F. A support unit S is provided to support the body 10 of the injector T on the upper surface 2 of the concrete structure C via an arm 40. A resisting means 70 is provided on the side opposite to the nozzle body 14 of the body 10 to resist a moment load M acting on the main body 10 during the filler F being discharged from a discharge port 12. The resisting means 70 is constituted of a rib 71 arranged between the tip side of the arm 40 and the other end side of the body 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concrete structure repair device for repairing cracks that have occurred in concrete structures such as those made of concrete or mortar by filling them with filler, and in particular to a concrete structure repair device suitable for the surface of a concrete structure on which it is difficult to install a filler injector. [Background technology]

[0002] A known example of a conventional concrete structure repair device is that disclosed in Japanese Patent No. 6012665 ​​(Patent Document 1), previously proposed by the applicant of the present application. This repair device includes a rod-shaped injector that extends in a direction perpendicular to the surface direction of the concrete structure where a crack is exposed, and has a nozzle body at its tip that is brought into contact with the exposed crack on the surface of the concrete structure and discharges filler, and the injector is supported by a support machine via an arm. The flow path leading to the nozzle body is perpendicular to the surface, ensuring reliable injection. The support machine is configured with a suction cup that is attached to the surface of the concrete structure by air suction and can be detached from the surface by releasing the suction.

[0003] Various concrete structures can be used, including slabs that form a slab-type track on which high-speed rail vehicles such as Shinkansen trains run, as shown in FIG. 5. Concrete structures C made of slabs are arranged in a row at a predetermined interval E along the longitudinal direction. The concrete structures C are formed into rectangular plates and placed on a base 1, which serves as a concrete roadbed. They have a top surface 2, side surfaces 3 perpendicular to the top surface 2, and an end surface 4. A recess 6 is formed in the center of the end surface 4 and is joined via a buffer material to a protrusion 5 protruding from the base 1. The size of the slab is set, for example, to a length of 4900 mm in the longitudinal direction, a length of 2220 mm in the lateral direction, and a height of 190 mm. The predetermined interval E between adjacent slabs is, for example, approximately 50 mm to 150 mm.

[0004] However, when attempting to apply the above-mentioned conventional repair device to cracks that have occurred in a slab, while it can easily deal with cracks on the top surface 2 of the slab, it cannot deal with cracks on the side surface 3 of the slab because the height dimension of the side surface of the slab is small and it is not possible to fix the suction cups that serve as support devices.

[0005] To solve this problem, it is conceivable to apply the injector disclosed in Japanese Utility Model Publication No. 58-1563 (Patent Document 2). As shown in FIG. 6, the injector Ta is composed of a rod-shaped main body 100 arranged along the surface direction of the concrete structure C where the cracks W are exposed and having an inlet 101 for filler F at one end, and a nozzle body 103 protruding from the side of the other end of the main body 100 and having a discharge port 102 for discharging filler F into the cracks W on the surface of the concrete structure C. The injector Ta has a first flow path 104 having a first axis P1 extending from the inlet 101 to the other end of the main body 100, and a second flow path 105 having a second axis P2 perpendicular to the first axis P1 extending from the other end of the first flow path 104 to the discharge port 102 of the nozzle body 103. That is, the flow path of the injector Ta is bent in an L-shape at the nozzle body 103.

[0006] According to this, in the case of the side surface 3 of the above-mentioned concrete structure C, if the main body 100 of the injector Ta is supported on a support machine via an arm and the support machine is fixed to the upper surface 2 of the slab, the injector Ta can be positioned so that the second flow path 105 of the nozzle body 103 is perpendicular to the side surface 3, which is the surface of the concrete structure C to be repaired, and therefore it becomes possible to inject filler F into the side surface 3 of such a slab. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6012665 [Patent Document 2] Jikko No. 58-1563 Summary of the Invention [Problem to be solved by the invention]

[0008] By using the above-mentioned injector Ta, it becomes possible to inject filler F into cracks that have occurred in the side surface 3 of a concrete structure C consisting of a slab with a small width dimension. However, when the filler F is discharged from the discharge port 102 of the nozzle body 103, the moment load M (reaction force) acting on the main body 100 cannot be sufficiently held down by the support device consisting of suction cups on the upper surface 2 alone, and the nozzle body 103 tends to separate from the surface, which makes it more likely for the filler F to leak and results in insufficient filling.

[0009] The present invention has been made in consideration of the above problems, and aims to provide a concrete structure repair device that can be easily installed on the surface of a concrete structure with a small width dimension, and that makes it difficult for the nozzle body to separate from the surface of the concrete structure when filler is discharged from the nozzle body's discharge port, thereby ensuring reliable filling of the filler. [Means for solving the problem]

[0010] In order to achieve the above object, the concrete structure repair device of the present invention is a concrete structure repair device for repairing a crack that has occurred on the surface of a concrete structure and has another surface perpendicular to the surface by filling a filler material into the crack, a syringe comprising a main body arranged along the surface direction of the concrete structure surface where cracks are exposed, having a filler inlet at one end and supported on the concrete structure by a support machine, and a nozzle body protruding from the side of the other end of the main body and having a discharge port formed therein for discharging filler into the cracks in the surface of the concrete structure, the syringe being formed with a first flow path having a first axis extending from the inlet of the main body to the other end, and a second flow path having a second axis extending from the other end of the first flow path to the discharge port of the nozzle body and perpendicular to the first axis; a resistance means provided on the main body on the opposite side to the nozzle body and configured to resist a moment load acting on the main body when the filler is discharged from the discharge port, The body of the injector is formed in an elongated shape along the first axis, The support device is configured to include an arm having an axis perpendicular to the first axis direction and having an insertion hole in the middle of its longitudinal direction through which one end side of the main body is inserted so as to be movable along the first axis direction, a positioning mechanism that positions the main body at a desired movement position relative to the arm, and a suction cup that supports the base end side of the arm relative to the insertion hole and is adsorbed to another surface by suction of air and can be removed from the other surface by releasing the suction, The injector body is provided with resistance means that is provided on the opposite side of the nozzle body and that resists the moment load that acts on the body when the filler is discharged from the discharge port, and the resistance means is composed of a rib that is provided between the tip side of the arm relative to the insertion hole and the other end side of the body and is fixed to the tip side of the arm.

[0011] As a result, when filling a crack that has appeared on the surface of a concrete structure with filler, the suction cup of the support machine is placed on another surface, the syringe body is positioned along the surface of the concrete structure where the crack is exposed, the tip of the nozzle body is placed facing the crack on the surface of the concrete structure, the suction cup is attached to the other surface by suction, and the body is supported by the support machine. In this case, the syringe body is moved back and forth through the insertion hole of the arm and positioned at the desired position using the positioning mechanism. In this case, since the support machine is attached to the other surface and the syringe is positioned along the surface of the concrete structure, the syringe can be easily installed on the surface of a concrete structure with a small width. Furthermore, since the syringe body can be positioned at the desired position by moving it back and forth through the insertion hole of the arm using the positioning mechanism, it is easier to position the nozzle body at the crack, thereby improving operability.

[0012] When filler is supplied to the main body in this state, it passes through the first flow path from the inlet to the other end of the main body, then through the second flow path in the nozzle body and is discharged from the discharge port. The second flow path in the nozzle body is L-shaped with respect to the first flow path, and the second axis of this second flow path is perpendicular to the surface of the concrete structure to be repaired, so the filler is injected into the crack. In this case, when filler is discharged from the nozzle body's discharge port, a moment load (reaction force) acts on the main body and also on the arm via the main body, trying to move the nozzle body away from the crack. However, because there is a rib as resistance means, the moment load acts on the arm via the rib and is supported by the support machine. This makes it more difficult for the nozzle body to move away from the crack in the concrete structure than without the rib. As a result, the filler is less likely to leak and the filling can be done more reliably. In other words, if there were no rib, the main body itself would be more likely to bend due to moment load, and the main body would be more likely to tilt due to the clearance between the main body and the arm's insertion hole, which would cause the nozzle body to move away from the crack, but this can be prevented by the rib.

[0013] If necessary, the rib is formed into a substantially triangular plate having a first side along the tip side of the arm, a second side along the other end side of the main body, and an open third side, the first side being fixed to the tip side of the arm, and a bolt mounting portion having a through female thread formed in sequence from the third side to the second side into which the male thread of a bolt is threaded is provided on the rib, and a bolt is attached by threading into the female thread portion of the bolt mounting portion, and the bolt is screwed in so that its tip can press against the other end side of the main body.

[0014] This means that even if there is a clearance between the other end of the main body and the second side of the rib and there is rattle, the bolt can be screwed in and its tip can press against the other end of the main body, eliminating the rattle.As a result, the main body is securely held in place by the rib, and the nozzle body is further prevented from separating from the surface.

[0015] In this case, it is effective to provide a plurality of bolt mounting portions at predetermined intervals along the longitudinal direction of the other end of the main body, and to mount a bolt on each of the bolt mounting portions.Since the other end of the main body can be pressed by the plurality of bolts, the pressing can be ensured.

[0016] If necessary, the suction cup may be configured to include a plate-like base body facing the other surface, a resin annular packing provided on the underside of the base body and elastically contacting the other surface, and a suction pipe provided to penetrate the base body and having a suction passage formed therein for sucking air from a space formed by the base body, the annular packing, and the other surface, The base end side of the arm from the insertion hole is supported on the suction tube via a universal joint, and abutment members whose tips abut against the other surface are provided on both sides of the arm sandwiching the suction cup. As a result, when the filler is discharged from the discharge port, a moment load also acts on the arm, causing a force to act on the suction cup in a direction that pulls it off another surface, but the abutment member can also withstand the moment load acting on the arm, making it difficult for the suction cup to peel off from the wall surface and further preventing the nozzle body from separating from the surface. [Effects of the Invention]

[0017] According to the present invention, the injector is positioned along the surface direction of the concrete structure, making it easy to install on the surface of a concrete structure with a small width. Furthermore, when filler material is dispensed from the nozzle body's discharge port, a moment load (reaction force) acts on the body, and also on the arm via the body, tending to move the nozzle body away from the crack. However, because of the presence of the rib as a resistance means, the moment load acts on the arm via the rib and is supported by the support machine. This makes it more difficult for the nozzle body to move away from the crack in the concrete structure than in a case without the rib. This reduces the risk of filler leakage and ensures reliable filling. In other words, without the rib, the body itself would be more likely to bend due to the moment load, and the body would be more likely to tilt due to the clearance between the body and the arm's insertion hole, which would cause the nozzle body to move away from the crack. However, the rib prevents this. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a concrete structure repair device according to an embodiment of the present invention, together with its state of use. [Figure 2] 1 is a partially cutaway side view showing the configuration of a support machine in a concrete structure repair device according to an embodiment of the present invention. [Figure 3] 1 is a side view showing a concrete structure repair device according to an embodiment of the present invention in use; [Figure 4] FIG. 10 is a side view showing a modified example of the concrete structure repair device according to the embodiment of the present invention together with its usage state. [Figure 5] 1 is a perspective view showing an example of a concrete structure to which a concrete structure repair device according to an embodiment of the present invention can be applied. [Figure 6] FIG. 1 is a side view showing an example of a conventional injector for repairing a concrete structure. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete structure repair device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The concrete structure repair device K according to the embodiment of the present invention shown in Figures 1 to 4 is used to inject a filler F into a crack W formed on the surface of a concrete structure C. As the filler F, well-known materials such as cementitious materials such as cement, mortar, and concrete, and resin materials such as unsaturated polyester resin and epoxy resin are used.

[0020] Various concrete structures C can be used, including, as described above, slabs that constitute a slab-type track on which high-speed rail vehicles such as Shinkansen trains run, as shown in FIG. 5. The slabs are arranged in a row at a predetermined interval E along the longitudinal direction. A repair device K for a concrete structure C according to an embodiment of the present invention is applied to a concrete structure C made of such slabs. The concrete structure C is formed in a rectangular plate shape and placed on a base 1 serving as a concrete roadbed. The concrete structure C has an upper surface 2, side surfaces 3 perpendicular to the upper surface 2, and an end surface 4. A recess 6 is formed in the center of the end surface 4 and is joined to a protrusion 5 protruding from the base 1 via a buffer material. The size of the slab is set, for example, to a longitudinal length of 4900 mm, a lateral length of 2220 mm, and a height of 190 mm. The predetermined interval E between adjacent slabs is, for example, approximately 50 mm to 150 mm.

[0021] The concrete structure repair device K of the embodiment is used to inject filler F into cracks W formed on the side surface 3, which is the surface of the concrete structure C consisting of this slab.For example, as shown in Figures 1, 3 and 5, filler F is injected into cracks W formed on the side surface 3, which is the surface of the concrete structure C to be repaired.

[0022] The repair device K according to the embodiment is equipped with an injector T for injecting filler F into a crack W. The injector T is composed of a main body 10 arranged along the surface direction of a side surface 3, which is the surface of a concrete structure C where the crack W is exposed, having an inlet 11 for the filler F at one end, and supported by a support machine S on the concrete structure C, and a nozzle body 14 protruding from the side of the other end of the main body 10, which is brought into contact with the portion of the surface of the concrete structure C where the crack W is exposed, and which has a tip surface 13 on which a discharge outlet 12 for the filler F is formed. The concrete structure C has a top surface 2, which is another surface perpendicular to the side surface 3, which is the surface to be repaired, and the support machine S is installed on this other surface, the top surface 2.

[0023] The syringe T is formed with a first flow path 15 having a first axis P1 extending from the inlet 11 of the main body 10 to the other end, and a second flow path 16 having a second axis P2 perpendicular to the first axis P1 extending from the other end of the first flow path 15 to the discharge port 12 of the nozzle body 14. The main body 10 is made of metal or resin, has an inlet 11 at one end, is formed with a rectangular cross section, and is formed in an elongated shape along the first axis P1. The main body 10 is formed with the first flow path 15 and the front side of the second flow path 16. A block-shaped nozzle body 14 made of metal or resin is attached to the block body 18, and the rear side of the second flow path 16 is formed in the nozzle body 14. A feed hose (not shown) for the filler F is connected to one end of the main body 10 via a manual on-off valve 21.

[0024] 1 to 3, the support machine S is configured to include an arm 40 having an axis perpendicular to the first axis P1 and having an insertion hole 41 midway in the longitudinal direction through which one end of the main body 10 is inserted so as to be movable along the first axis P1, a positioning mechanism 42 that positions the main body 10 at a desired movement position relative to the arm 40, and a suction cup 50 that supports the base end side of the arm 40 beyond the insertion hole 41 and is attracted to the top surface 2, which is another surface, by air suction and can be removed from the top surface 2, which is another surface, by releasing the suction. The positioning mechanism 42 is configured to include a female screw 43, which has an axis perpendicular to the axis of the arm 40, and is located in the wall of the arm 40 where the insertion hole 41 is formed, and a manual bolt 44 that is threaded into the female screw 43 to press the main body 10 against the inner wall surface of the insertion hole 41.

[0025] As shown in Figure 2, the suction cup 50 is configured to include a disk-shaped base 51 facing the upper surface 2 (the other surface); an annular resin packing 52 provided on the underside of the base 51 and elastically contacting the upper surface 2 (the other surface); and a suction pipe 53 extending through the center of the base 51 and having a suction passage 54 for sucking air from the space formed by the base 51, the annular packing 52, and the upper surface 2 (the other surface). The base end of the arm 40 relative to the insertion hole 41 is supported by the suction pipe 53 via a universal joint 55 fixed to the arm 40 so as to be movable up and down. A coil spring 56 is interposed between the universal joint 55 and the base 51, and the tubular packing 52 is pressed against the upper surface 2 (the other surface) by the biasing force of this coil spring 56. Reference numeral 57 denotes a manual nut that threads onto a male thread formed on the suction pipe 53 to move the suction pipe 53 up and down and adjust the strength of the coil spring 56.

[0026] Furthermore, abutment members 60 are provided at the front and rear of arm 40, sandwiching suction pad 50, with their tips abutting against top surface 2, which serves as another surface. There is one abutment member 60 on the front side, and a pair of rear abutment members 60 are provided at equal intervals in a direction perpendicular to the axis of arm 40 on wing members 61, which are provided perpendicular to the rear end of arm 40. The abutment members 60 are formed by bolts with heads, and are provided in insertion holes 64 of arm 40 so that they can move forward and backward with their heads in contact with the ground. A coil spring 62 is interposed between arm 40 and the bolt head, and the abutment member 60 is pressed against top surface 2, which serves as another surface, by the biasing force of this coil spring 62. Nut 63 is threaded onto the male threads of the bolt serving as abutment member 60, moving the abutment member 60 up and down to adjust the strength of coil spring 62, and 65 is a cap nut threaded onto the tip of the bolt.

[0027] The repair device K according to the embodiment is provided with resistance means 70, which is provided on the opposite side of the main body 10 and resists a moment load M acting on the main body 10 when the filler F is discharged from the discharge port 12. The resistance means 70 is configured with a rib 71, which is provided between the distal end of the arm 40 and the other end of the main body 10 and is fixed to the distal end of the arm 40, and is formed as a substantially triangular plate having a first side 72 along the distal end of the arm 40, a second side 73 along the other end of the main body 10, and an open third side 74. The first side 72 of the rib 71 is fixed to the distal end of the arm 40 by a bolt 75. The rib 71 is also provided with a bolt mounting portion 79, which extends from the third side 74 to the second side 73 and includes an insertion hole 77 through which the head of a bolt 76 is inserted and a through-hole female thread portion 78 into which the male thread of the bolt 76 is threaded. Then, a bolt 76 is screwed into the female thread portion 78 of the bolt mounting portion 79 to mount it, and the bolt 76 is screwed in so that its tip can press against the other end side of the main body 10. A plurality of bolt mounting portions 79 (three in this embodiment) are provided at predetermined intervals along the longitudinal direction of the other end side of the main body 10, and a bolt 76 is mounted to each bolt mounting portion 79.

[0028] Therefore, when using the repair device K according to this embodiment to fill a crack W that has appeared in the side surface of a concrete structure C with filler F, as shown in Figures 1 to 3, the suction cup 50 of the support machine S is placed on the upper surface 2, which is another surface of the concrete structure C, and the main body 10 of the injector T is positioned along the surface of the side surface 3 of the concrete structure C where the crack W is exposed. The tip surface 13 of the nozzle body 14 is brought into contact with the exposed portion of the target crack W, and the suction cup 50 is attached to the upper surface 2 by suction, and the main body 10 is supported by the support machine S. In this case, the main body 10 of the injector T is moved back and forth through the insertion hole 41 of the arm 40 and positioned at the desired position by the positioning mechanism 42. Next, the bolt 76 of the resistance means 70 is screwed in, and its tip is pressed against the other end of the main body 10.

[0029] In this case, the support machine S is attached to the top surface 2 as another surface, and the injector T is arranged along the surface direction of the side surface 3 of the concrete structure C, so that the injector T can be easily installed on the side surface 3 as the surface of the concrete structure C, which has a small width. Also, the main body 10 of the injector T can be moved back and forth through the insertion hole 41 of the arm 40 and positioned at a desired movement position by the positioning mechanism 42, so that the nozzle body 14 can be easily positioned at the position of the crack W, thereby improving operability.

[0030] In this state, filler F is supplied to the main body 10. The filler F passes through a first flow path 15 that extends from the inlet 11 of the main body 10 to the other end, passes through a second flow path 16 of the nozzle body 14, and is discharged from the discharge port 12. However, the second flow path 16 of the nozzle body 14 is L-shaped relative to the first flow path 15, and the second axis P2 of this second flow path 16 is perpendicular to the surface of the concrete structure C to be repaired, so that the filler F is injected into the crack W. In this case, when the filler F is discharged from the discharge port 12 of the nozzle body 14, a moment load M (reaction force) acts on the main body 10, and a moment load also acts on the arm 40 via the main body 10, tending to separate the nozzle body 14 from the surface. However, because the resistance means 70 has the rib 71, the moment load M acts on the arm 40 via the rib 71 and is received by the support machine S. This makes it more difficult for the nozzle body 14 to separate from the surface of the concrete structure C than in the absence of the rib 71. As a result, the filler F is less likely to leak, ensuring reliable filling. In other words, without the rib 71, the main body 10 itself would be more likely to bend due to the moment load, and the main body 10 would be more likely to tilt due to the clearance between the main body 10 and the insertion hole 41 of the arm 40, tending to separate the nozzle body 14 from the surface. However, the rib 71 prevents this.

[0031] Furthermore, since bolts 76 are threaded through bolt mounting portions 79 provided on rib 71 and their tips are pressed against the other end of main body 10, even if there is a clearance between the other end of main body 10 and second side 73 of rib 71 and there is rattle, bolts 76 can be threaded and their tips can be pressed against the other end of main body 10, eliminating rattle and thereby reliably holding main body 10 with rib 71 and further preventing nozzle body 14 from separating from the surface. Moreover, since multiple bolt mounting portions 79 are provided at predetermined intervals, multiple bolts 76 can press the other end of main body 10, ensuring reliable holding and further preventing nozzle body 14 from separating from the surface.

[0032] 4 shows a modified example of a repair device K for a concrete structure C according to the embodiment. In this example, a plurality of nozzle bodies 14 (three in this embodiment) are provided at predetermined intervals along the longitudinal direction of the main body 10 of the injector T. This allows the filler F to be injected into multiple cracks W at the same time, improving injection efficiency.

[0033] In the repair device K according to the above embodiment, the nozzle body 14 has a flat tip surface 13 that can contact the surface of the concrete structure C. However, this is not necessarily limited to this, and the nozzle body 14 may have a tapered tip like the conventional nozzle body 103 (FIG. 6) that can be inserted into the crack W, and modifications may be made as appropriate. Also, in the above embodiment, the concrete structure C is applied to a railway track slab, but this is not necessarily limited to this, and the concrete structure may be applied to any type of concrete structure, and modifications may be made as appropriate. Those skilled in the art will readily make many modifications to these exemplary embodiments without substantially departing from the novel teachings and effects of the present invention, and these many modifications are within the scope of the present invention. [Explanation of symbols]

[0034] K Repair equipment C. Concrete structure W Crack F Filling material 1 base 2 Top surface 3. Aspects 4 End face T syringe M moment load 10 Main Unit 11 Entrance 12 Outlet 13 Tip surface 14 Nozzle body P1 1st axis P2 2nd axis 15 First Flow Path 16 Second Flow Path 21 On-off valve S support machine 40 Arm 41 Insertion hole 42 Positioning mechanism 50 suction cup 51 Base 52 Gasket 53 Suction tube 54 Suction passage 55 Universal joint 56 coil spring 57 Manual Nut 60 Contact member 61 Wing member 62 coil spring 63 Nut 64 Insertion hole 65 Cap nut 70 Resistance Means 71 Ribs 72 Side 1 73 Side 2 74 Third Side 75 volts 76 volts 77 Insertion hole 78 Female thread 79 Bolt mounting part

Claims

1. A concrete structure repair device for repairing a crack that has occurred on the surface of a concrete structure and has another surface perpendicular to the surface by filling a filler material into the crack, a syringe comprising a main body arranged along the surface of a concrete structure where cracks are exposed, having a filler inlet at one end and supported on the concrete structure by a support machine; and a nozzle body protruding from the side of the other end of the main body and having a discharge port formed therein for discharging filler into the cracks in the surface of the concrete structure, wherein the syringe is formed with a first flow path having a first axis extending from the inlet of the main body to the other end, and a second flow path having a second axis extending from the other end of the first flow path to the discharge port of the nozzle body and perpendicular to the first axis; a resistance means provided on the main body on the opposite side to the nozzle body and configured to resist a moment load acting on the main body when the filler is discharged from the discharge port, The body of the injector is formed in an elongated shape along the first axis, The support device is configured to include an arm having an axis perpendicular to the first axis direction and having an insertion hole in the middle of its longitudinal direction through which one end side of the main body is inserted so as to be movable along the first axis direction, a positioning mechanism that positions the main body at a desired movement position relative to the arm, and a suction cup that supports the base end side of the arm relative to the insertion hole and is adsorbed to another surface by suction of air and can be removed from the other surface by releasing the suction, A concrete structure repair device characterized in that it is provided with resistance means provided on the opposite side of the nozzle body of the injector body to resist the moment load acting on the body when filler is discharged from the discharge port, and the resistance means is composed of a rib provided between the tip side of the arm relative to the insertion hole and the other end side of the body and fixed to the tip side of the arm.

2. 2. A concrete structure repair device as described in claim 1, characterized in that the rib is formed in a substantially triangular plate shape having a first side along the tip side of the arm, a second side along the other end side of the main body, and an open third side, the first side being fixed to the tip side of the arm, the rib being provided with a bolt mounting portion having a female threaded portion extending from the third side to the second side into which the male thread of a bolt is threaded, a bolt is threadedly attached to the female threaded portion of the bolt mounting portion, and the bolt is screwed in so that its tip can press against the other end side of the main body.

3. 3. The concrete structure repair device according to claim 2, wherein a plurality of said bolt mounting portions are provided at predetermined intervals along the longitudinal direction of the other end of the main body, and a bolt is mounted to each of said bolt mounting portions.

4. the suction cup comprises a plate-like base body facing the other surface, a resin annular packing provided on the underside of the base body and elastically contacting the other surface, and a suction pipe provided to penetrate the base body and having a suction passage formed therein for sucking air from a space formed by the base body, the annular packing, and the other surface, 4. A concrete structure repair device as set forth in claim 1, wherein the base end side of the arm relative to the insertion hole is supported on the suction pipe via a universal joint, and abutment members whose tips abut against the other surface are provided on the front and rear of the arm sandwiching the suction cup, respectively.

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