Concrete structure repair equipment

Abstract

To provide a concrete structure repair device, which can be easily set up even on a surface in a narrow space around 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 an end surface 4(A) of a concrete structure C(A) 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 of the body 10 to discharge the filler F. A resisting means 30 is provided on the side opposite to the nozzle body 14 of the body 10 to resist a moment load M acting on the body 10 during the filler F being discharged from a discharge port 12. The resisting means 30 is constituted comprising: a screw rod 31 arranged on the side of the body 10; and an abutting body 34 which is screwed on the screw rod 31 and rotated to abut against an end surface 4 (B) of another concrete structure C (B).SELECTED DRAWING: Figure 3

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. 4. 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 serving as a concrete roadbed. They have 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 via a buffer material to a protrusion 5 protruding from the base 1. 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.

[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, there was a problem in that it could not deal with cracks on the end surface 4 of the slab because there is an adjacent slab and it cannot be placed within the gap E.

[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. 5, 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 order to deal with cracks W that have occurred on the end faces 4 of the above-mentioned concrete structure C, the injector Ta can be inserted between the end faces 4 of adjacent concrete structures C, its main body 100 supported on a support machine via an arm, and the support machine fixed to the upper surface 2 of the slab.This makes it possible to position the injector Ta, and therefore to inject filler F at the end face 4 of such a slab, making it easy to deal with the cracks. [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] However, when the above-mentioned injector Ta is used, it can be inserted between the end faces 4 of adjacent concrete structures C, making it possible to inject filler F into cracks that have occurred in the end faces 4. However, when the filler F is discharged from the discharge outlet 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 is likely 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-mentioned problems, and aims to provide a concrete structure repair device that can be easily installed on the surface of a concrete structure in a narrow space, 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 that the filler can be filled in reliably. [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 that has another structure having a surface facing the surface at a predetermined distance, by filling a filler 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 resistance means is configured to include a threaded rod having a male thread with the second axis as its center axis, and a base end portion of the threaded rod provided on the side of the main body opposite to the side from which the nozzle body is protruding, and which has a tip portion that can approach the surface of the other structure when the tip of the nozzle body is faced to a crack in the surface of the concrete structure, and an abutment body that has a female thread that screws into the male thread of the threaded rod, is rotated, and protrudes from the tip of the threaded rod to abut against the surface of the other structure.

[0011] Thus, when filling a crack that has appeared on the surface of a concrete structure with filler, the injector is inserted between the surface of the concrete structure where the crack is exposed and the surface of another structure facing it, and the injector body is positioned along the surface direction of the surface of the concrete structure where the crack is exposed. The tip of the nozzle body is then placed facing the crack on the surface of the concrete structure, and the abutment body of the resistance means is then rotated relative to the threaded rod so that it protrudes from the tip of the threaded rod and abuts against the surface of the other structure, and the resistance means is further rotated to press the tip face of the nozzle body against the crack, so to speak, tensioning it. In this case, the resistance means, which consists of the threaded rod and the abutment body, is relatively small and can be easily inserted between the surfaces, and the injector can be easily installed simply by rotating the abutment body.

[0012] In this state, the filler is supplied to the main body. The filler then 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 relative 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, as the filler is discharged from the nozzle body's discharge port, a moment load (reaction force) acts on the main body, which tries to move the nozzle body away from the crack. However, this moment load is received by the surface of the other structure via the main body, threaded rod, and abutment of the resistance means, so the main body does not bend, and the nozzle body is prevented from moving away from the crack. This reduces the filler's leakage resistance, ensuring reliable filling.

[0013] In this configuration, it is effective that the support of the main body is configured as the resistance means. For example, a separate support such as a conventional suction cup may be provided, but since the support is configured as the resistance means, that is, the support and resistance means are combined, there is no need to provide a separate support, and the number of parts can be reduced accordingly.

[0014] If necessary, the contact body may be formed in a disk shape with a female screw thread formed along the central axis, and the contact body may be formed with a plurality of holes at equal angular intervals that open on its outer circumferential surface and have radial axes through which rod-shaped wrenches can be inserted. This allows a wrench to be inserted into the hole in the contact body and the contact body to be rotated via this wrench, making it easy to operate the contact body even when the crack is located in a deep position, thereby improving operability.

[0015] Furthermore, if necessary, a fixing part consisting of a female screw that is detachable from the base end of the threaded rod and that is screwed into and fixed when attached is provided on the side opposite the main body, and a configuration is provided in which a plurality of threaded rods of different lengths are provided. As a result, when there are various predetermined distances between the surface of a concrete structure where a crack is exposed and the surface of another structure facing it, for example, when the predetermined distance is in the range of 50 mm to 150 mm as in the above-mentioned slab, threaded rods that match these predetermined distances can be selected and used, thereby improving versatility.

[0016] Furthermore, if necessary, the nozzle body may be configured to have a tip end surface that is adapted to abut against the exposed crack on the surface of the concrete structure and that has a filler discharge port formed therein, and a plate-like pad that resiliently contacts the surface of the concrete structure and has a through hole coaxial with the discharge port may be attached to the tip end surface of the nozzle body. This configuration allows the pad to resiliently contact the cracked surface when the abutment body is rotated relative to the threaded rod to abut against the surface of another structure and press the tip end surface of the nozzle body against the cracked surface, thereby reliably holding the resistance means. Furthermore, the improved adhesion between the pad and the cracked surface further reduces the risk of filler leakage, ensuring reliable filling. [Effects of the Invention]

[0017] According to the present invention, the injector is positioned along the surface direction of the concrete structure's surface, making it easy to install on the surface of a concrete structure in a narrow space. Furthermore, when filler is dispensed from the nozzle body's outlet, a moment load (reaction force) acts on the main body, tending to move the nozzle body away from the crack. However, this moment load is received by the surface of another structure via the main body, threaded rod, and abutment of the resistance means, preventing the main body from bending and preventing the nozzle body from moving away from the crack. This reduces the risk of filler leakage, ensuring reliable filling. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a partially cutaway perspective view showing a concrete structure repair device according to an embodiment of the present invention. [Figure 2] 1 is an exploded perspective view showing a main part of 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] 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 5] 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 3 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. 4. 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] 1 to 3 show a repair device K for a concrete structure C according to an embodiment of the present invention. This device is used to inject a filler F into a crack W formed in an end face 4, which is the surface of the concrete structure C consisting of a slab. For example, as shown in FIGS. 3 and 4, there is a concrete structure C(B) as a separate structure having an end face 4(B), which is the surface of the concrete structure C(A) to be repaired, facing the end face 4(A) at a predetermined distance E, and this repair device K injects a filler F into a crack W formed in the end face 4(A) of the concrete structure C(A).

[0022] The repair device K according to the embodiment is equipped with an injector T that injects filler F into a crack W. The injector T is composed of a main body 10 that is arranged along the surface direction of the surface of the concrete structure C where the crack W is exposed, has an inlet 11 for the filler F at one end, and is supported on the concrete structure C by a support machine S (resistance means 30 described below), and a nozzle body 14 that protrudes from the side of the other end of the main body 10, is brought into contact with the portion of the surface of the concrete structure C where the crack W is exposed, and has a tip surface 13 on which is formed a discharge port 12 that discharges the filler F into the crack W.

[0023] This injector 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 extending from the other end of the first flow path 15 to the discharge port 12 of the nozzle body 14 and perpendicular to the first axis P1.

[0024] The main body 10 comprises a metal or resin cylindrical body 17 having an inlet 11 at one end and a metal or resin rectangular block body 18 connected to the other end of the cylindrical body 17. The cylindrical body 17 has a front side of a first flow path 15 formed therein, and the block body 18 has a rear side of the first flow path 15 and a front side of a second flow path 16 formed therein. A metal or resin rectangular block-shaped nozzle body 14 is attached to the block body 18, and the nozzle body 14 has a rear side of a second flow path 16 formed therein. The rear side of the second flow path 16 is formed to expand toward the discharge port 12. A plate-like pad 20 is attached to the tip surface 13 of the nozzle body 14 and elastically contacts the surface of the concrete structure C. The plate-like pad 20 has a through hole coaxial with the discharge port 12. The width between the surface of the block body 18 opposite the nozzle body 14 and the tip surface 13 of the plate-like pad 20 is set to, for example, 30 mm. A feed hose (not shown) for the filler material F is connected to one end of the cylindrical body 17 of the main body 10 via a manual on-off valve 21 .

[0025] The repair device K according to the embodiment is provided with resistance means 30, which is provided on the side of the block body 18 of the main body 10 opposite to the nozzle body 14 and which 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 30 is provided with a base end on the side of the main body 10 opposite to the side from which the nozzle body 14 protrudes, and a tip end which is capable of approaching the surface of another adjacent concrete structure C (end face 4(B) in the figure) when the tip face 13 of the nozzle body 14 is abutted against the surface of the concrete structure C (end face 4(A) in FIG. 3), and is configured with a threaded rod 31 having a male thread 32 with a second axis P2 as its center axis, and a contact body 34 which has a female thread 33 that screws into the male thread 32 of the threaded rod 31, is rotated, and protrudes from the tip of the threaded rod 31 to abut against the surface of the other structure (end face 4(B) in the figure).

[0026] The abutment body 34 is formed in a disk shape with a female thread 33 formed along the central axis. This abutment body 34 has a plurality of holes 36 formed at equal angular intervals on its outer circumferential surface, which open to the abutment body 34, have axes in the radial direction, and into which rod-shaped wrenches 35 (Fig. 1) can be inserted.

[0027] Furthermore, on the side of the main body 10 opposite the block body 18, a fixing portion 37 consisting of a female screw that is detachably attached to the base end of the screw rod 31 and is screwed into and fixed when attached is provided. As shown in Fig. 2, a plurality of types of screw rods 31 with different lengths are provided. As described above, the predetermined interval E between adjacent slabs is, for example, about 50 mm to 150 mm, so a plurality of types of screw rods 31 with lengths in the range of, for example, 20 mm to 110 mm are provided.

[0028] Furthermore, the main body 10 is supported on the concrete structure C by a support S, and in this embodiment, the support S of the main body 10 is configured with the above-mentioned resistance means 30. Therefore, for example, a separate support such as a conventional suction cup may be provided, but since the support S is configured with the resistance means 30, that is, the support S and the resistance means 30 are combined, there is no need to provide a separate support, and the number of parts can be reduced accordingly.

[0029] Therefore, when using the repair device K according to this embodiment to fill a crack W that has appeared in an end face 4(A) of a concrete structure C(A) consisting of a slab with filler material F, as shown in Figure 3, an injector T is inserted between the end face 4(A) of the concrete structure C where the crack W is exposed and the end face 4(B) of another concrete structure C(B) facing it, and the body 10 of the injector T is positioned along the surface direction of the end face 4(A) of the concrete structure C where the crack W is exposed. Then, the tip face 13 of the nozzle body 14 is brought into contact with the location where the target crack W is exposed, and then the contact body 34 of the resistance means 30 is rotated relative to the threaded rod 31 using the wrench 35 to protrude from the tip of the threaded rod 31 and come into contact with the end face 4(B) of the other concrete structure C(B). Further rotation is performed to press the tip face 13 of the nozzle body 14 against the surface with the crack W, so to say, tension it.

[0030] In this case, the resistance means 30 is made up of the threaded rod 31 and the abutment body 34, and is therefore relatively small, so it can be easily inserted between the surfaces, and the injector T can be easily installed by simply rotating the abutment body 34. Furthermore, to rotate the abutment body 34, a wrench 35 is inserted into the hole 36 of the abutment body 34, and the abutment body 34 can be rotated using this wrench 35. Therefore, even if the crack W is located deep, the abutment body 34 can be easily operated, improving operability.

[0031] In this state, filler F is supplied to the main body 10. As a result, the filler F passes through the first flow path 15 that extends from the inlet 11 of the main body 10 to the other end, passes through the second flow path 16 of the nozzle body 14, and is discharged from the discharge port 12. 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 end face 4(A) 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, causing the nozzle body 14 to move away from the surface, but this moment load M is received by the end face 4(B) of another concrete structure C(B) via the main body 10, threaded rod 31, and abutment body 34 of the resistance means 30, so the main body 10 does not bend and the nozzle body 14 is prevented from moving away from the end face 4(A) of the concrete structure C. This makes it less likely for the filler F to leak, ensuring reliable filling.

[0032] In this case, the pad 20 is in elastic contact with the surface having the crack W, so that the resistance means 30 can be reliably held. In addition, the adhesion between the pad 20 and the surface having the crack W is improved, so that the filler F is more unlikely to leak and the filling can be reliably carried out.

[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, but this is not necessarily limited to this, and the nozzle body 14 may have a tapered tip like the conventional nozzle body 103 (FIG. 5) so that it can be inserted into the crack W, and modifications may be made as appropriate. In addition, the repair device K according to the above embodiment uses both the support machine S and the resistance means 30, but this is not necessarily limited to this, and the support machine S may be provided separately, and modifications may be made as appropriate. If the support machine S is provided separately, the resistance means 30 can be easily operated.

[0034] Furthermore, in the above embodiment, the concrete structure C is applied to a slab for a railway track, but the present invention is not necessarily limited to this, and may be applied to any type of concrete structure C, and modifications may be made as appropriate. In this case, it goes without saying that the other structure does not have to be the same as the concrete structure C. Those skilled in the art will easily 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]

[0035] K Repair equipment C. Concrete structure W Crack F Filling material 1 base 2 Top surface 3. Aspects 4 End face T syringe 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 17 Cylindrical body 18 Block Letters 20 pads 21 On-off valve S support machine 30 resistance means M moment load 31 Threaded rod 32 male thread 33 Female thread 34 Contact body 35 wrench 36 Hole 37 Fixed part

Claims

1. A concrete structure repair device for repairing a crack that has occurred on the surface of a concrete structure that has another structure with a surface facing the surface at a predetermined distance, by filling the crack with a filler, 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, a contact body that has a female thread that screws onto the male thread of the threaded rod, is rotated, and projects from the tip of the threaded rod to contact the surface of the other structure.

2. 2. The concrete structure repair device according to claim 1, wherein the resistance means constitutes a support for the main body.

3. 2. A concrete structure repair device according to claim 1, wherein the contact body is formed in a disk shape with a female thread formed along its central axis, and the contact body has a plurality of holes formed at equal angular intervals on its outer periphery, the holes having axes in the radial direction and through which rod-shaped wrenches can be inserted.

4. A concrete structure repair device as described in claim 3, characterized in that a fixing portion consisting of a female screw is provided on the side opposite to the main body, which is detachable from the base end of the screw rod and is screwed into and fixed when installed, and a plurality of types of screw rods of different lengths are provided.

5. 5. A concrete structure repair device as described in any one of claims 1 to 4, characterized in that the nozzle body has a tip surface that is brought into contact with the area where the crack is exposed on the surface of the concrete structure and has a filler discharge outlet formed thereon, and a plate-like pad that is in elastic contact with the surface of the concrete structure and has a through hole coaxial with the discharge outlet is attached to the tip surface of the nozzle body.

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