Concrete structure repair device

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 a 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] Conventionally, a concrete structure repair device is known, for example, as disclosed in Japanese Patent No. 6012665 ​​(Patent Document 1) previously proposed by the applicant of the present application. This repair device is equipped with a rod-shaped injector that is arranged extending in a direction perpendicular to the surface direction of the concrete structure where cracks are exposed, and has a nozzle body at its tip that is brought into contact with the site where the cracks are exposed on the surface of the concrete structure to discharge a filler, and this injector is supported by a support machine via an arm. The flow path leading to the nozzle body is perpendicular to the surface to ensure reliable injection. The support machine is configured with a suction cup that is adsorbed to the surface of the concrete structure by air suction and can be removed from the surface by releasing the suction.

[0003] Incidentally, various concrete structures can be mentioned, and for example, as shown in FIG. 4, slabs constituting a slab-type track on which high-speed rail vehicles such as Shinkansen trains run can be mentioned. Concrete structures C made of slabs are arranged in a row at a predetermined interval E along the longitudinal direction. The concrete structure C is formed in a rectangular plate shape, and is placed on a base 1 as a concrete roadbed, and has an upper surface 2, a side surface 3 perpendicular to the upper surface 2, and an end surface 4. In the center of the end surface 4, a recess 6 is formed, which 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, about 50 mm to 150 mm.

[0004] However, when trying 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 that it could not be used to 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 between them.

[0005] In order to solve this problem, it is possible to apply the injector described 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 surface of the concrete structure C where the cracks W are exposed and having an inlet 101 for the 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 the filler F into the cracks W on the surface of the concrete structure C. In the injector Ta, a first flow path 104 having a first axis P1 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 are formed. 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 a crack W that has occurred on the end face 4 of the above-mentioned concrete structure C, the injector Ta can be positioned by inserting it between the end faces 4 of adjacent concrete structures C, supporting its main body 100 on a support machine via an arm, and fixing the support machine to the upper surface 2 of the slab.This makes it possible to inject filler F at such an end face 4 of the slab, thereby making it easy to deal with the crack W. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6012665 [Patent Document 2] Jpn. Jpn. Published 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 a suction cup on the upper surface 2, and the nozzle body 103 is likely to separate from the surface, which can cause leakage of the filler F and result in insufficient filling.

[0009] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a concrete structure repair device which can be easily installed on the surface of a concrete structure located in a narrow space, and which 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 the filling of the filler. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a concrete structure repair device for repairing a concrete structure by filling a filler into a crack that has occurred on the surface of a concrete structure that has another structure having a surface facing the surface of the concrete structure at a predetermined distance therefrom, the concrete structure repair device comprising: a syringe comprising a main body arranged along the surface direction of a concrete structure having an exposed crack, a filler inlet at one end, and supported by a support machine on the concrete structure; 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 on the surface of the concrete structure, the syringe being provided 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 perpendicular to the first axis extending from the other end of the first flow path to the discharge port of the nozzle body, 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 central axis, the base end of which is provided on the side of the main body opposite to the side from which the nozzle body is protruded, the tip of which 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 a contact body having a female thread that screws into the male thread of the threaded rod and is rotated to protrude from the tip of the threaded rod and contact the surface of the other structure.

[0011] Thus, when filling a crack that has occurred 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 body of the injector is arranged along the surface direction of the surface of the concrete structure where the crack is exposed. Then, the tip of the nozzle body is made to face the crack on the surface of the concrete structure, and then the abutment body of the resistance means is rotated with respect to the threaded rod to protrude from the tip of the threaded rod and abut against the surface of the other structure, and further rotated to press the tip surface of the nozzle body against the crack, so to say, bracing it. In this case, since the resistance means is made of the threaded rod and the abutment body, it is relatively small and can be easily inserted between the surfaces, and since it is only necessary to rotate the abutment body, the injector can be easily installed.

[0012] In this state, the filler is supplied to the main body. As a result, the filler passes through the first flow path from the inlet of the main body to the other end side, passes through the second flow path of the nozzle body, and is discharged from the discharge port. The second flow path of 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 the filler is discharged from the discharge port of the nozzle body, a moment load (reaction force) acts on the main body, which tries to move the nozzle body away from the crack, but the moment load is received by the surface of another structure via the main body, the screw rod, and the abutment body of the resistance means, so that the main body does not bend and the nozzle body is prevented from moving away from the crack. Therefore, the filler is less likely to leak, and the filling can be performed reliably.

[0013] In this configuration, it is effective that the support of the main body is constituted by the resistance means. For example, a support such as a conventional suction cup may be provided separately, but since the support is constituted by the resistance means, that is, the support and the 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 abutment body may be formed in a disk shape with a female screw formed along the central axis, and the abutment body may have a plurality of holes formed at equal angular intervals that open on the outer circumferential surface of the abutment body and have an axis in the radial direction into which a rod-shaped wrench can be inserted. This allows a wrench to be inserted into the hole of the abutment body and the abutment body to be rotated via the wrench, so that even if the crack is located in a deep position, the abutment body can be easily operated, improving operability.

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

[0016] Furthermore, if necessary, the nozzle body is configured to have a tip surface that is brought into contact with the exposed crack on the surface of the concrete structure and has a filler discharge port formed thereon, and a plate-shaped pad that is in elastic contact with the surface of the concrete structure and has a through hole coaxial with the discharge port is attached to the tip surface of the nozzle body. In this way, when the abutment body is rotated relative to the threaded rod to bring it into contact with the surface of another structure and press the tip surface of the nozzle body against the cracked surface, the pad comes into elastic contact with the cracked surface, so that the resistance means can be reliably held. In addition, the adhesion between the pad and the cracked surface is improved, so that the filler is more unlikely to leak and can be reliably filled. Effect of the Invention

[0017] According to the present invention, the injector is arranged along the surface direction of the concrete structure's surface, so that it can be easily installed on the surface of a concrete structure in a narrow space. Also, when the filler is discharged from the nozzle of the nozzle body, a moment load (reaction force) acts on the main body, which tries to move the nozzle body away from the crack, but the moment load is received by the surface of another structure via the main body of the resistance means, the screw rod, and the abutment body, so that the main body does not bend and the nozzle body is prevented from moving away from the crack. Therefore, the filler is less likely to leak, and the filling can be performed reliably. [Brief description 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. [Diagram 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. [Diagram 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. [Diagram 5] FIG. 1 is a side view showing an example of a conventional injector for repairing a concrete structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 for injecting 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 cement-based materials such as cement, mortar, and concrete, and resin materials such as unsaturated polyester resin and epoxy resin are used.

[0020] As the concrete structure C, various types can be mentioned, but as described above, for example, as shown in FIG. 4, slabs constituting a slab-type track on which high-speed rail vehicles such as Shinkansen trains run can be mentioned. 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 the concrete structure C consisting of this slab. The concrete structure C is formed in a rectangular plate shape, installed on a base 1 as a concrete roadbed, and has an upper surface 2, a side surface 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, which 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, about 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 is used to inject a filler F into a crack W formed in an end face 4 as a surface of a 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) as a surface facing the end face 4(A) as a surface of the concrete structure C(A) to be repaired 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 includes an injector T for injecting a filler F into a crack W. The injector T is composed of a main body 10 that is disposed 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 later), 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 site on 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 for discharging 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 is composed of a metal or resin circular tube 17 having an inlet 11 at one end, and a metal or resin rectangular block 18 connected to the other end of the circular tube 17. The front side of the first flow passage 15 is formed in the circular tube 17, and the rear side of the first flow passage 15 and the front side of the second flow passage 16 are formed in the block 18. A metal or resin rectangular block-shaped nozzle body 14 is attached to the block 18, and the rear side of the second flow passage 16 is formed in the nozzle body 14. The rear side of the second flow passage 16 is formed to be expanded toward the discharge port 12. A plate-shaped pad 20 is attached to the tip surface 13 of the nozzle body 14, which is in elastic contact with the surface of the concrete structure C and has a through hole coaxial with the discharge port 12. The width dimension between the surface of the block body 18 opposite to the nozzle body 14 and the tip surface 13 of the plate-shaped pad 20 is set to, for example, 30 mm. A feed hose (not shown) for the filling 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 a resistance means 30 that is provided on the opposite side of the nozzle body 14 of the block body 18 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 30 is provided with a screw rod 31 having a male screw 32 with the second axis P2 as a central axis, the base end of which is provided on the side of the main body 10 opposite to the nozzle body 14 protruding therefrom and a tip end of 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 a contact body 34 having a female screw 33 that screws into the male screw 32 of the screw rod 31, which is rotated to protrude from the tip of the screw rod 31 and 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 screw 33 formed along the central axis. This abutment body 34 is formed with a plurality of holes 36 at equal angular intervals that open on its outer circumferential surface, have an axis in the radial direction, and allow insertion of a rod-shaped wrench 35 (FIG. 1).

[0027] Further, on the side of the main body 10 opposite to the block body 18, a fixing part 37 consisting of a female screw that is detachably attached to the base end of the screw rod 31 and is screwed 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 that 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 serves as both the resistance means 30, there is no need to provide a separate support, and the number of parts can be reduced accordingly.

[0029] Therefore, when filling the filler F through the crack W generated in the end face 4(A) as the surface of the concrete structure C(A) consisting of a slab using the repair device K according to this embodiment, as shown in Fig. 3, the 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) as the surface of another concrete structure C(B) facing it, and the main body 10 of the injector T is arranged 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 abutted against the part where the target crack W is exposed, and then the abutment body 34 of the resistance means 30 is rotated relative to the screw rod 31 using the wrench 35 to project from the tip of the screw rod 31, and abutted against the end face 4(B) of another concrete structure C(B), and further rotated to press the tip face 13 of the nozzle body 14 against the surface with the crack W, so to say, brace it.

[0030] In this case, since the resistance means 30 is made up of the threaded rod 31 and the abutment body 34, it is relatively small and can be easily inserted between the surfaces, and since it is only necessary to rotate the abutment body 34, the injector T can be easily installed. In addition, when rotating 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 via this wrench 35, so that even if the crack W is located deep, the abutment body 34 can be easily operated, improving operability.

[0031] In this state, the 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 side, 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 with respect to the first flow path 15, and the second axis P2 of the 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 cracks 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, which tries to separate the nozzle body 14 from the surface, but the moment load M is received by the end face 4(B) of another concrete structure C(B) via the main body 10, the screw rod 31, and the abutting body 34 of the resistance means 30, so the main body 10 does not bend and the nozzle body 14 is prevented from separating from the end face 4(A) of the concrete structure C. This makes it difficult for the filler F to leak, and the filling can be carried out reliably.

[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 filling material F is more unlikely to leak, and the filling can be reliably performed.

[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] In addition, 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 may be modified as appropriate. In this case, the other structure does not have to be the same as the concrete structure C. Those skilled in the art can easily make many modifications to these exemplary embodiments without substantially departing from the novel teachings and effects of the present invention, and many of these modifications are included in 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 side 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 generated in a surface of a concrete structure having another structure having a surface facing the surface of the concrete structure at a predetermined distance therefrom by filling the crack with a filler, a syringe comprising a main body arranged along the surface direction of a concrete structure having an exposed crack, a filler inlet at one end, and supported by a support machine on the concrete structure; and a nozzle body protruding from the side of the other end of the main body and having a discharge port for discharging filler into the cracks on the surface of the concrete structure, the syringe being provided 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 perpendicular to the first axis extending from the other end of the first flow path to the discharge port of the nozzle body, 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 nozzle body protruding from the surface of the concrete structure and a tip end of the nozzle body protruding from the surface of the concrete structure; a threaded rod having a male thread with the second axis as its central axis, the base end of the threaded rod being provided on the side of the main body opposite to the side from which the nozzle body protrudes, the tip end being capable of approaching the surface of the other structure when the tip of the nozzle body is brought into opposition to a crack in the surface of the concrete structure; and a contact body having a female thread that screws into the male thread of the threaded rod and that is rotated to protrude from the tip end of the threaded rod and contact the surface of the other structure.

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

3. 2. The concrete structure repair device according to claim 1, wherein the contact body is formed in a disk shape with a female thread formed along a central axis, and the contact body is formed with a plurality of holes at equal angular intervals that open onto its outer circumferential surface and have an axis in the radial direction, into which a rod-shaped wrench can be inserted.

4. The concrete structure repair device according to claim 3, characterized in that a fixing portion consisting of a female screw is provided on the opposite side of the main body, to which the base end of the screw rod is detachably attached and which 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 port formed therein, and a plate-shaped pad that is in elastic contact with the surface of the concrete structure and has a through hole coaxial with the discharge port is attached to the tip surface of the nozzle body.

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