KR20000012271A - A epoxy resin pouring apparatus for mending a crack of concrete structures - Google Patents

Abstract

PURPOSE: The epoxy resin injection device is provided to repair a crack part by injecting epoxy waterproof liquid into the crack part when occurring a crack in a concrete structure. CONSTITUTION: The epoxy resin injection device for a cracking repairing of a concrete structure is composed of: a container unit(204,205) consisted of a storage container(201) for epoxy A, a storage container(202) for epoxy B; a clamp device(20) for forcibly oppressing the cover(201a, 202a) of the storage containers(201,202); a lever(30) having a drilled hole member(32,31) drilled a through hole(32a,31a) at the center and the front end to be drilled the lower face of the containers(201,202) by being inserted into the recessed part(204a,205a) of the container unit(204,205) established to be rotated based on a rotation central axis(30a).

Description

Epoxy resin injector for crack repair of concrete structures {A EPOXY RESIN POURING APPARATUS FOR MENDING A CRACK OF CONCRETE STRUCTURES}

The present invention relates to an epoxy resin injection device for repairing cracks in concrete structures used when repairing cracks by injecting epoxy waterproofing liquids into cracks when cracks occur in concrete structures.

Conventionally, as an apparatus for injecting an epoxy waterproofing liquid into a crack to repair a crack in a concrete structure, the present applicant filed a utility model registration (application number; No. 90-13621) in 1993 on August 31, 1990. There is a Korean Utility Model Publication No. 93-677, issued February 19.

The disposable cement paste injector disclosed in the Utility Model Bulletin, that is, the epoxy resin injector for crack repair of a concrete structure, has an induction guide in which a rectangular seat portion 4 and a through hole 6 are formed as shown in FIG. 1. An injection guide plate (1) having a tube (5), a syringe-like injection body (2), and an elongated coil spring (3) are provided.

In addition, the injection guide plate (1) has a pair of spring engaging portion (7) for hanging both ends of the elongated coil spring (3) on the rear side of the rectangular seat plate portion (4), the syringe-like injection body (2) Is provided with a conical injection nozzle (8) inserted into the through hole (6) in which the injection guide pipe (5) is formed, and the other end is a cylinder (10) having an open end (9), and the cylinder (10). Piston 11, which slides in the inside, one end is covered with the piston 11 is fixed and the lower end includes a piston rod 12 having a cross-section formed with a spring support groove 14 on the outside, the long Both ends of the coil spring (3) are releasably fixed to each spring engaging portion (7) of the injection guide plate (1), the central portion of which is in the disc 13 on the rear end side of the piston rod (12) It is comprised so that it may be supported by the formed spring support groove 14.

In order to repair the cracked part of the concrete using the epoxy resin injection device for crack repair of the conventional concrete structure configured as described above, first, the rectangular seat plate 4 is bonded to the cracked part using an adhesive or the like, and then a specific time ( After about 24 hours has elapsed, the cylinder 10 into which the epoxy resin (resin mixed with epoxy A and epoxy B) is injected into the through hole 6 formed in the injection guide tube 5 of the rectangular seat plate portion 4. The conical injection nozzle (8).

Next, the both ends of the elongated coil springs 3 are hooked to the spring latches 7 and 7 respectively formed in the rectangular seat plate 4, and then the middle portions of the elongated coil springs 3 are pulled out to form a piston rod 12. When supported by the spring support support groove 14 formed to traverse in the radial direction to the disk 13 of the (13), the piston rod 12 is conical injection nozzle (10) in the cylinder (10) by the contracting force of the long coil spring (3) 8) Push to the side.

At this time, the piston 11 coupled to the distal end of the piston rod 12 pushes the epoxy resin injected into the cylinder 10 toward the conical injection nozzle 8 and is injected into the crack of the concrete structure. As the injected epoxy resin is cured, it is possible to reinforce the crack.

However, the epoxy resin injection device for crack repair of a conventional concrete structure configured as described above, after the rectangular seat plate portion 4 is bonded to the crack portion using an adhesive or the like, after a specific time (about 24 hours) has elapsed, Since epoxy resin must be injected into the through hole 6 formed in the injection guide plate 5 of the rectangular seat plate part 4, it takes not only a long time to repair the cracked portion of the concrete structure, but also epoxy A in the cylinder 10. If the epoxy resin mixed with epoxy B is not used before a specific time (curing time) has elapsed, the epoxy resin hardens and cannot be used. Therefore, epoxy resin (epoxy A (topic) and epoxy B (curing agent) mixed) The resin) has to be disposed of.

In addition, since the epoxy resin injection device for crack repair of a conventional concrete structure is mixed when the epoxy A (topic) and epoxy B (hardener) are introduced into the cylinder 10, epoxy A (topic) and epoxy B (hardener) In the case of changing the mixing ratio of), there are various problems such as the disposal of the epoxy resin that is put into the cylinder 10, which cannot be used. Since the rectangular seat plate portion 4 adhered to the cracked portion must be removed, a large amount of waste is generated.

The present invention has been made in view of the above-mentioned various problems, and an object of the present invention is to concretely mix epoxy A (topic) and epoxy B (hardener) in order to easily repair the cracked portion of the concrete structure. An epoxy resin injection device for crack repair of structures is provided.

Another object of the present invention to provide an epoxy resin injection device for crack repair of concrete structures that can reduce the amount of epoxy resin waste.

In order to achieve the above object, the present invention provides an accommodating part in which a main storage container and a hardening agent storage container are placed, a clamp means vertically inserted from the receiving part to press the lid of the storage container, and a recess in the receiving part. In accordance with the driving of the drive motor is installed in the shaft and the eccentric to the perforated member rotatably centered around the center of rotation and the perforated member is pointed to penetrate the lower surface of the storage container and perforated through the center When the main piston and the eccentric disk for the hardener to suck the main and hardener through the hose from the recess formed in the receiving portion, respectively, and the unit (short axis) portion of the main eccentric disk, the first piston as the reverse The main body is sucked from the recess of the receiving portion and abutted with the long (long axis) portion of the main eccentric disk. In the case of contacting the first check valve for discharging the suctioned main subject through the discharge port and the unit (short) portion of the eccentric disk for the hardener, the second piston is retracted to suck the hardener from the concave portion of the receiving portion. When contacted with the long (long axis) portion of the eccentric disk for the curing agent, the second check valve for discharging the sucked curing agent through the discharge port, and the first to the first to the second eccentric disk for the curing agent to set the mixing ratio of the main agent and the curing agent Mixing ratio selection means for selecting any one of the three eccentric disks and the main and hardeners discharged through the outlets of the first and second check valves, respectively, are mixed through a hose to inject epoxy resin into the cracks of the concrete structure. It characterized in that it comprises a mixing / discharging unit.

1 is an exploded perspective view of an epoxy resin injection device for crack repair of a concrete structure according to the prior art,

Figure 2 is a front view of the epoxy resin injection device for crack repair of a concrete structure according to an embodiment of the present invention,

3 is a longitudinal cross-sectional view of FIG.

4 is a left side view of FIG. 2;

5 is a right side view of FIG. 2;

Figure 6 is an exploded perspective view of a part of the epoxy resin injection device for crack repair of concrete structures according to an embodiment of the present invention,

7 is a plan view of the cover and the clamping means removed from Figure 6,

8 is a schematic perspective view of a sealing gun for injecting an epoxy resin applied to a crack portion of a concrete structure according to an embodiment of the present invention;

9 is an exploded longitudinal sectional view of part of FIG. 8;

10 is an exploded perspective view of FIG. 8.

<Description of the symbols for the main parts of the drawings>

20: clamp means 21: holding

21a: Through hole 22, 23: Support lever

24, 25: Pressing member 24a, 25a: Bolt part

26: Handle part 30: Lap base (30)

30a: center of rotation axis 31, 32: perforated member

31a, 32a: Through hole 33, 34: Coil spring

40: cradle support member 50: drive motor

50a: rotating shaft 52: pulley

54: belt 56: driven pulley

57: shaft 60: eccentric disc for hardener

61: first eccentric disc 62: second eccentric disc

63: third eccentric disk 64: second piston

64a: Round flange 67, 77: Guide member

69: second coil spring 70: eccentric disk for the subject

71: hose 72: first piston

72a: round flange 79: first coil spring

80: first check valve 82: outlet

84: hose 90: second check valve

92: outlet 94: hose

100: mixing ratio selection means 110: mixing / discharge unit

102: bolt portion 104: adjustment knob

106: elastic member 110: mixing / discharging unit

111: first joint 112: second joint

113: Handle 113a, 113b: Nut part

113c: Through hole 114: Agitator

115: housing 115a: discharge hole

116: first support plate 117: second support plate

116a, 116b, 117a, 117b: Through hole 118: Holding member

118a: receiving groove 118b: connecting rod

118c: screw part 119: nut

201: Storage container for the subject 201a, 202a: Cover

202: storage container for the hardener 204, 205: accommodating part

204a, 205a: concave portion 212, 214: elastic member

230: body 231: cover

232: bottom plate

Hereinafter, an epoxy resin injection device for crack repair of a concrete structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a front view of the epoxy resin injection device for crack repair of a concrete structure according to an embodiment of the present invention, Figure 3 is a longitudinal sectional view of Figure 2, Figure 4 is a left side view of Figure 2, Figure 5 is Figure 2 Right side view of the. And, Figure 6 is an exploded perspective view of a part of the epoxy resin injection device for repairing cracks of a concrete structure according to an embodiment of the present invention, Figure 7 is a plan view of the cover and the clamp means in Figure 6 removed, Figure 8 FIG. 9 is a schematic perspective view of a sealing gun for injecting an epoxy resin to a crack of a concrete structure, FIG. 9 is an exploded longitudinal sectional view of FIG. 8, and FIG. 10 is an exploded perspective view of FIG. 8.

2 to 10, the epoxy resin injection device for crack repair of a concrete structure according to an embodiment of the present invention is a storage container for epoxy A (topic) and the storage container for epoxy B (curing agent) ( Receptacles 204 and 205 on which the 202 is mounted, clamp means 20 vertically inserted from the receptacles 204 and 205 to press the covers 201a and 202a of the storage containers 201 and 202, and the receptacle 202 Rotating perforated members 32 and 31 penetrated into recesses 204a and 205a of 204 and 205 so as to perforate the lower surfaces of the storage containers 201 and 202 and having pointed ends and through holes 32a and 31a in the center thereof. A cradle 30 rotatably installed about a central axis 30a, and a cradle support member 40 fixed to the lower portions of the receiving portions 204 and 205 so as to support the cradle 30; have.

In addition, the epoxy resin injection device for crack repair of the concrete structure of the present invention is installed eccentrically to the shaft 57, the recesses 204a and 205a formed in the receiving portions 204 and 205, respectively, as the drive motor 50 is driven. The first and second eccentric discs 70 and 60 for sucking the main body and the hardener through the hoses 71 and 61, and the unit (shortening) portion of the main eccentric disk 70 When the piston 72 is retracted, the subject is sucked from the recesses 204a and 205a of the receiving portions 204 and 205 and contacted with the mandrel (long axis) portion of the subject eccentric disc 70. When the first check valve 80 discharged through the discharge port 82 and the unit (short) portion of the eccentric disk 60 for the hardener are contacted with each other, the second piston 64 is moved backwards. Sucking the curing agent from the recesses 204a and 205a of the 204 and 205, and When contacted with the long (long shaft) portion of the eccentric disk 70, the second check valve 90 for discharging the sucked hardener through the discharge port 92, and the eccentric for the hardener to set the mixing ratio of the main agent and the hardener Mixing ratio selecting means 100 for selecting any one of the first to third eccentric disks 61, 62, 63 of the disk 60, and outlets of the first and second check valves 80, 70 ( The mixing and discharging unit 110 which receives the main and hardeners discharged through the 82 and 92 through the hoses 84 and 94 and mixes them and injects the epoxy resin into the cracks of the concrete structure.

At the free end of the lanyard 30 (opposite side where the punching members 31 and 32 are installed), the center of rotation shaft 30a can be easily transported so that the epoxy resin injection device for crack repair of the concrete structure of the present invention can be easily transported. A gripping portion 39 is formed to fold the girder 30 into the center to press the strut 21 of the clamp means 20.

Between the circular flange 72a integrally formed in the middle of the first piston 72 and the first check valve 80, the first piston 72 is elastically resilient to the outer circumferential surface of the main eccentric disk 70. The first coil spring 79 is provided so as to abut in contact with each other, and the second coil is provided between the circular flange 64a and the second check valve 60 integrally formed at an intermediate portion of the second piston 64. A second coil spring 69 is provided to elastically abut the piston 64 on the outer circumferential surface of the eccentric disk 60 for the hardener.

As shown in detail in FIGS. 4 and 5, the clamp means 20 is vertically installed on the receiving portions 204 and 205 and has a support 21 formed with a through hole 21a for positioning along a longitudinal direction thereof. Support levers 22 and 23 slidably installed on the support 21 so as to adjust the height along the support 21, and the front end portions of the support levers 22 and 23 for the main and hardeners Compression members 24 and 25 having bolts 24a and 25a to press the upper portions of the storage containers 201 and 202, respectively, and a handle portion 26 provided on the upper portion of the support 21 are provided.

Between the outer circumferential surface of the punching members 32 and 31 and the outer circumferential surfaces of the recesses 204a and 205a of the receiving portions 204 and 205, the coil springs 33 and 34 respectively push the punching members 32 and 31 downward. An elastic member (212, 214) is disposed on the bottom of the receiving portion (204, 205), that is, the lower portion of the main container and the hardener storage containers (201, 202) to elastically support these containers.

The eccentric disk 60 for the curing agent is a mixing ratio of the main material and the curing agent 2: 1, 4: 1, 5; The first to third eccentric disks 61, 62, and 63 having different diameters are sequentially installed on the shaft 57 so as to mix at one.

The mixing ratio selecting means 100 includes a bolt portion 102 installed outside the shaft 57 and an eccentric disk 60 for the curing agent to be wound around the bolt portion 102 to increase or decrease the amount of the curing agent. Adjustment knob 104 for selecting the first to third eccentric disks (61, 62, 63), and the outer shaft is wound around the shaft 57, the contraction as the turning knob clockwise / counterclockwise And an elastic member 106 that is inflated and positioned to abut one of the first to third eccentric disks 61, 62, 63 selected by the adjusting knob 104 to the second piston 64. Consists of.

As illustrated in FIGS. 8 to 10, the mixing / discharging unit 110 may discharge the main and hardener discharge hoses 84 from the outlets 82 and 92 of the first and second check valves 80 and 90. The first and second joints 111 and 112 and the pair of nut parts 113a and 113b are formed to screw the first and second joints 111 and 112, and are operated by hand at the same time. Epoxy resin containing the handle 113 to grip, the main body and the curing agent introduced through the hoses (84, 94) and the stirrer (114) and the stirrer (114) and mixed by the stirrer (114) A pair of housings 115 having a discharge hole 115a for discharging a mixture of a main agent and a curing agent, and a pair of rear and front portions of the housing 115 that are rotatably supporting the stirrer 114 and a pair First and second support plates 116 and 117 having through holes 116a and 116b and 117a and 117b formed therein, and the housing 115. An accommodating groove 118a is formed at one end portion of the housing 115 to accommodate the outer circumferential surface of the housing 115 so as to be detachable and extends vertically apart from the accommodating groove 118a by a predetermined length. A grip member 118 having a connecting rod 118b penetrated into a through hole 113c formed therein, and a threaded portion 118c formed at a connecting rod 118b of the holding member 118 to handle the housing 115. It consists of the nut 119 fixed to 113. As shown in FIG.

In the drawings, reference numeral 50a denotes a rotation shaft of the drive motor 50, and a sprocket or pulley 52 is installed on the rotation shaft 50a, and the pulley 52 transmits a driving force to the shaft 57. Is connected to a driven sprocket or driven pulley 56 provided on the shaft 57 via a chain or belt 54.

In FIG. 6, reference numeral 231 denotes a cover, 232 denotes a bottom plate, and the cover 231 and the bottom plate 232 are fastened to the main body 230 by fastening bolts (not shown). In the drawing, reference numeral 67 denotes a guide member for guiding the operation of the first piston 72, and 77 denotes a guide member for guiding the operation of the second piston 64.

Next, the operation and effects related to the epoxy resin injection apparatus for crack repair of a concrete structure according to an embodiment of the present invention configured as described above will be described.

First, the epoxy A (topic) storage container 201 and the epoxy B (curing agent) storage container 202 are placed in the receiving portions 204 and 205, respectively, and then the support levers 22 and 23 of the clamp means 20 are mounted. Position the pressing member 24 on the main storage container 201, and at the same time position the pressing member 25 on the storage container for hardener 202, and then A pin (not shown) is inserted into the through hole 21a formed in the support 21 to fix the first and second support levers 22 and 23, and tighten the bolt portions 24a and 25a to press the pressing member ( 24 and 25 are firmly pressed to the main container and the hardener storage containers 201 and 202, respectively.

Next, when the cradle 30 is pushed downward about the rotation center axis 30a, the perforation members 31 and 32 are moved upwards to perforate the bottom surfaces of the main and hardener storage containers 201 and 202. At this time, when the force applied to the cradle 30 is removed, the drilling members 31 and 32 are returned to their lower positions by the expansion force of the coil springs 33 and 34 respectively installed on the outer circumferential surfaces of the drilling members 31 and 32. At the same time, the main and hardeners leak from the main and hardener storage containers 201 and 202 into the recesses 204a and 205a respectively formed in the receiving portions 204 and 205, respectively.

At this time, the adjusting knob 104 of the mixing ratio selecting means 100 is adjusted to select any one of the first to third eccentric disks 61, 62, 63 of the eccentric disk 60 for the curing agent. Here, the case where the first eccentric disk 61 is selected among the first to third eccentric disks 61, 62, and 63 (the example where the main agent and the hardener are mixed at 2: 1) will be described as an example.

Thereafter, when the main switch (not shown) is switched on, the driving motor 50 is driven, and the driving force of the driving motor 50 is transferred to the shaft through the rotation shaft 50a, the pulley 52 and the driven pulley 56. Delivered and the shaft 57 begins to rotate.

As the shaft 57 starts to rotate, the main eccentric disc 70 rotates and the first piston 72 moves forward when the major portion of the eccentric disc 70 contacts the first piston 72. The main body introduced into the first check valve 80 is discharged through the discharge port 82, and when the unit of the eccentric disk 70 contacts the first piston 72, the first piston 72 The first piston 72 is retracted by the expansion force of the first coil spring 79, which is wound around the first coil 72, and the main body is first checked through the hose 65 from the recess 204a of the main storage container 201. Is introduced into the valve (80).

At the same time, when the first eccentric disk 61 of the hardener eccentric disk 60 is rotated and the long part of the first eccentric disk 61 is in contact with the second piston 64, the second piston 64 To discharge the hardener introduced into the second check valve 90 through the outlet 92, and when the unit of the first eccentric disk 61 contacts the second piston 64, The hardening agent passes through the hose 71 from the concave portion 205a of the storage container 202 for curing by retreating the second piston 64 by the expansion force of the second coil spring 69 which is wound around the piston 64. Is introduced into the first check valve (90).

This operation is repeated to mix / discharge through the through hole 116a formed in the outlet 82, the hose 84, and the first support member 116 of the first check valve 80. The main body is supplied to the housing 115 of the unit 110, and also to the outlet 92, the hose 94, the first joint 112, and the first support member 116 of the second check valve 90. 50% by weight of the curing agent is supplied to the housing 115 of the mixing / dispensing unit 110 through the formed through hole 116b (50% by weight of the curing agent relative to 100% by weight of the subject).

In this manner, when the main body and the hardener are supplied into the housing 115 of the mixing / discharging unit 110, the main body and the hardener are supplied to the first and second support plates 116 and 117 by the force supplied with the main body and the hardener. Epoxy resin mixed with stirring while being rotated is injected into the concrete crack through the plurality of through holes 117a and 117b and the discharge hole 115a formed in the second support plate 117.

In this way, after the epoxy resin (the mixture of the main agent and the curing agent) is injected into the concrete cracking portion, the nut 119 screwed to the screw portion 118c formed on the holding member 118 of the mixing / discharging unit 110. Loosen the connecting rod 118b of the gripping member 118 to the front to separate the handle 113 and the housing 115 to dispose of the housing and the stirrer 114.

Accordingly, the epoxy resin injecting device for crack repair of a concrete structure according to the present invention is a housing 115 of the mixing / discharging unit 110 immediately before injecting the epoxy resin to the crack in the work site when repairing the crack of the concrete structure Since it is mixed by the stirrer 114 in the inside), there is no fear that the epoxy resin mixed with the main material and the curing agent will harden, and thus the waste amount of the epoxy resin can be greatly reduced, and after repairing the concrete cracked portion, Since only the housing 115 and the stirrer 114 of the mixing / discharging unit 110 is discarded, it is possible to reduce the waste amount of the epoxy resin injection unit.

On the other hand, if you want to mix the mixing ratio of the main material and the curing agent at 4: 1, turn the adjustment knob 104 of the mixing ratio selection means 100 clockwise in Figure 7, the bolt portion 102 is moved to the left The second piston 64 and the second eccentric disk 62 abut, so that only 25% by weight of the curing agent is supplied to the housing 115 of the mixing / discharging unit 110 with respect to the subject matter. When the adjusting knob 104 is further turned clockwise in FIG. 7, the bolt portion 102 further moves to the left side so that the second piston 64 and the third eccentric disk 63 are brought into contact with each other so that the curing agent is 20% by weight. Since only the supply to the housing 115 of the mixing / discharging unit 110 can adjust the mixing ratio of the main material and the curing agent, and turning the adjusting knob 104 of the selection means 100 counterclockwise in Figure 7 bolts The part 102 moves to the right so that the second piston 64 and the second or first eccentric discs 62 and 61 Abutment to vary the curing agent mixing ratio for the subject.

And, if you want to move or store the epoxy resin injection device for repairing the cracks of the concrete structure according to the present invention to rotate the base belt 30 in the clockwise direction about the center of rotation axis (30a) to the base belt 30 In combination with the support 21 of the clamp means 20 in the gripping portion (39) formed at the free end of the c), it is moved or stored.

As described above, according to the epoxy resin injection device for crack repair of the concrete structure of the present invention, the tip is pointed to penetrate the lower surface of the storage container so as to be penetrated into the recesses of the receiving parts respectively receiving the main and the curing agent storage containers. A cradle having a perforated member having a through hole perforated in the center, a cradle support member fixed to the lower portion of the accommodation portion so as to support the cradle, and eccentrically installed on the shaft and driven by the driving motor. When the main and hardener eccentric disks for sucking the main and hardeners through the hoses from the recesses formed respectively, and the unit (short axis) part of the main eccentric disks, are contacted with each other, the first piston moves backwards. When the main body is sucked from the body and contacted with the mandrel of the eccentric disk for the main body. The first check valve and the first check valve for discharging the suctioned main subject through the discharge port, and when contacted with the unit (shortening) portion of the eccentric disk for the hardener, the second piston is retracted to suck the hardener from the recess of the receiving portion A second check valve for discharging the sucked hardener through the discharge port, a mixing ratio selecting means for setting a mixing ratio of the main agent and the hardener when the eccentric disc of the hardener is brought into contact with the support member; 2 The mixing / exhaust unit for injecting epoxy resin into the crack of the concrete structure by mixing the main material and the hardener discharged through the outlet of the check valve through the hose and injecting the epoxy resin into the crack of the concrete structure can be easily repaired. The main material and the curing agent can be mixed evenly so that the epoxy resin and the epoxy resin injection unit There is an excellent effect that can reduce the amount.

Claims (4)

Receptacles 204 and 205 in which the main storage container 201 and the curing agent storage container 202 are placed, and are vertically inserted from the receiving parts 204 and 205 to cover the covers 201a and 202a of the storage containers 201 and 202. The pressing means 20 is pressed into the recesses 204a and 205a of the receiving portions 204 and 205 so that the tip ends are pointed to penetrate the lower surfaces of the storage containers 201 and 202, and the through holes 32a and 31a are centered. Perforated members 32 and 31 which are perforated) are rotatably installed about the center of rotation axis 30a and under the receiving portions 204 and 205 to support the undercarriage 30. The main body and the hardening agent are installed from the recesses 204a and 205a formed in the receiving portions 204 and 205 according to the driving of the drive motor 50 by being mounted eccentrically on the support belt 40 and the shaft 57 fixed thereto. And eccentric discs 70 and 60 for main and hardeners, which are sucked through the hoses 71 and 61, and the main eccentric discs. In the case of contact with the unit (shortening) of 70, as the first piston 72 is retracted, the main body is sucked from the recesses 204a and 205a of the receiving sections 204 and 205, and the main eccentric disk 70 When contacted with the manor (long axis), the first check valve 80 for discharging the suctioned main subject through the discharge port 82 and, if contacted with the unit (shortening) of the eccentric disk 60 for the hardener 2 When the piston 64 is retracted, the curing agent is sucked from the recesses 204a and 205a of the receiving portions 204 and 205, and the suctioned curing agent is brought into contact with the long axis of the eccentric disk 70 for the curing agent. Among the first to third eccentric disks 61, 62, and 63 of the eccentric disk 60 for hardener to set the mixing ratio of the second check valve 90 and the main body and the hardener through the outlet 92 Mixing ratio selecting means (100) for selecting any one and the first and second check valve (80, 70) It is characterized in that it comprises a mixing / discharge unit 110 for injecting epoxy resin into the cracks of the concrete structure by mixing the main and the curing agent discharged through the discharge port (82,92) through the hose (84,94) Epoxy resin injection device for crack repair of concrete structures. The method of claim 1, wherein the mixing ratio selecting means 100 is for the hardener so as to increase the discharge amount of the hardener is wound around the bolt portion 102 and the bolt portion 102 provided to the outside of the shaft (57) The adjusting knob 104 for selecting the first to third eccentric disks 61, 62, 63 of the eccentric disk 60, and the clockwise / counterclockwise direction of the adjusting knob 104 which is wound around the shaft 57. Is contracted and expanded as it turns in the direction to position any one of the first to third eccentric disks 61, 62, 63 selected by the adjusting knob 104 to the second piston 64. Epoxy resin injection device for repairing cracks of a concrete structure, characterized in that consisting of an elastic member 106. According to claim 1, wherein the mixing / discharging unit 110 and the hose (84, 94) for discharging the main and hardener discharged from the outlet (82,92) of the first and second check valve (80,90) The first and second joints 111 and 112 to be connected to each other and a pair of nut parts 113a and 113b are formed to screw the first and second joints 111 and 112 and at the same time, a handle that is gripped by hand during operation ( 113), an agitator 114 for mixing the main agent and the curing agent introduced through the hoses 84 and 94, and an epoxy resin (the main agent and the curing agent) containing the agitator 114 and mixed by the agitator 114. And a discharge hole 115a having a discharge hole 115a formed therein, and installed at the rear and front sides of the housing 115 so as to pivotally support the stirrer 114 and to provide a pair of through holes. First and second support plates 116 and 117 having 116a and 116b and 117a and 117b, respectively, and the housing 115 to be attached and detached. An accommodating groove 118a is formed at one end of the housing 115 to accommodate an outer circumferential surface of the discharge hole 115a of the housing 115 and extends vertically by a predetermined length away from the accommodating groove 118a to form a through hole formed in the handle 113. The gripping member 118 having the connecting rod 118b penetrated into the 113c and the threaded portion 118c formed at the connecting rod 118b of the gripping member 118 are joined to the handle 113. Epoxy resin injection device for crack repair of a concrete structure, characterized in that consisting of nuts 119 for fixing. The eccentric disk (60) for hardener according to claim 1 or 2, wherein the mixing ratio of the main agent and the hardener is 2: 1, 4: 1,5; Epoxy resin injection device for crack repair of a concrete structure, characterized in that the first to third eccentric disks (61, 62, 63) of different diameters are sequentially installed on the shaft (57) so as to mix in one.