JP2501273B2 - Reinforcing chemical injection device for repairing concrete cracks - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention repairs cracks formed on the wall surface or bottom surface of a concrete structure by injecting and filling a crack with a reinforcing chemical containing epoxy resin as a main component. The present invention relates to a reinforcing chemical injection device for repairing concrete cracks, and particularly to a device for facilitating a piston operation and easily adjusting a biasing force for biasing a piston body after containing a reinforcing chemical.

[0002]

2. Description of the Related Art As a conventional reinforcing chemical liquid injection device for repairing concrete cracks, there is a utility model Sho 60-126659 "Automatic liquid chemical injection device for fine cracks in concrete structures" and Japanese Patent Laid-Open No. 61-4566 "Concrete Construction". There are "Automatic injection agent for repairing chemicals on the wall of objects" and No. 61-146346, "Automatic injector for repairing chemicals on walls of concrete structures", which are used to adjust and reinforce the injection amount and injection pressure of reinforcing chemicals. Items necessary for repair work such as storage and storage of the main agent of the chemical liquid and the curing agent have not been completely solved.

Japanese Patent Application No. 63-30 previously proposed by the present inventor
No. 5607 (see Japanese Patent Publication No. 5-12504), JP-A-2-153169
No. "Reinforcement chemical injection device for concrete crack repair"
Is a solution to the above problems, mixing the concentration of the reinforcing chemical liquid lightly or densely according to the size of the cracks generated in the concrete structure, and the injection pressure of the reinforcing chemical liquid also has a weak pressure depending on the concentration state of the reinforcing chemical liquid. Alternatively, we focused on the fact that we had to inject with strong pressure, and made it possible to rationally inject and fill the reinforcing chemical liquid to the deep layer of the crack. For this reason, when a rubber piston is attached to the inside of a cylindrical case that doubles as a cylinder, and a spring restricting ring is installed on the rod of the piston, the spring restricting ring is inserted on the rod of the piston. By installing springs with weak elastic force and springs with strong elastic force in the front and rear to operate these two spring elastic forces reasonably and in a composite manner, the injection pressure of the reinforcing chemical liquid is made weak or strong. So that crack repair work can be completed efficiently.

However, since the piston body is constantly urged by a spring having a weak elastic force and a spring having a strong elastic force, when accommodating the reinforcing chemical liquid, work must be performed against the urging force of both springs. The problem is that the operator is very tired when there are many places to work. Further, when the reinforcing chemical liquid is stored inside the cylindrical case, the piston body retracts due to the weight of the reinforcing chemical liquid. However, it is necessary to freely adjust the biasing force of the spring that biases the piston body even after storing the reinforcing chemical liquid.

[0005]

In view of the above-mentioned circumstances, the present invention keeps the state in which the piston body is pulled and the spring is compressed in order to reduce the fatigue of the operator when there are many working places. In order to prevent the biasing force of the spring from acting when the piston body is drawn after the reinforcing chemical liquid is squeezed out, the piston body 6 biased by the spring is slidably provided in the cylindrical case 1, and the spring biasing force is applied. The spring is compressed against and the piston body 6 is pulled and engaged to stop the piston body 6, and the reinforcing chemical liquid is accommodated in the cylindrical case 1 which is vacant due to the pulling operation of the piston body 6, A reinforcing chemical injection device for repairing a concrete crack, wherein the body 6 is slid in a biasing direction of a spring to inject a reinforcing chemical into a crack of concrete, The piston body 21 includes a piston 25 having a piston body 21 in which the rubber body piston 5 is located on the accommodation chamber side and extends from the center to the spring side, and an outward flange 30 with which the rubber body piston 5 engages. Piston guide 18 that extends the guide cylinder 8 that guides
And a reinforcing chemical for repairing concrete cracks, which is formed by engraving an elongated hole 32 in the axial direction in the guide cylinder 8 and projecting an engaging pin 33 at the base end of the piston rod 21 and inserting it into the elongated hole 32. It is an injection device.

Further, according to the present invention, the piston body is urged by a spring in the cylindrical case 1 so that the urging force of the piston body can be easily adjusted even after the reinforcing chemical liquid is stored in the cylindrical case. 6 is slidably provided, the spring is compressed against the urging force of the spring, the piston body 6 is pulled and engaged, and the piston body 6 is stopped.
Cylindrical case 1 which has become empty due to the pulling operation of
In a reinforcing chemical liquid injecting device for concrete crack repair, in which a reinforcing chemical liquid is housed and a piston body 6 is slid in a biasing direction of a spring to inject the reinforcing chemical liquid into a crack of concrete, the tip of the piston body 6 The pressure adjuster 35 is screwed to the side, the spring is seated on the pressure adjuster 35 and accommodated in the cylindrical case 1, and a protrusion is provided on the seating portion of the spring to engage the spring end with the protrusion. A reinforcing chemical liquid injecting device for repairing concrete cracks, in which the end portion of is strongly fitted to the pressure adjusting tool 35 so that the pressure adjusting tool 35 does not rotate even when the rotational force of the piston body 6 acts on the pressure adjusting tool 35. did.

[0007]

Function: The piston body is pulled and the compressed state of the spring is maintained, the reinforcing chemical liquid is squeezed out by the piston, and the piston is pulled in the state in which the biasing force of the spring is not acting. Further, according to the present invention, when the piston body is rotated, the pressure adjusting tool does not rotate and the spring is compressed or expanded.

[0008]

[Examples] In general, in concrete structures, the phenomenon in which the concrete itself hardens continuously and gradually over a long period of time appears. A shrinkage effect due to such a hardening phenomenon causes cracks in the concrete structure itself, and the cracks have caused a phenomenon in which the waterproof function of the concrete structure deteriorates and durability is lost.
As a means for preventing such a phenomenon, it is necessary to prevent the functional deterioration of the concrete structure by the work of closing the generated cracks. As a reinforcing agent for satisfying such a point, a reinforcing chemical solution containing an epoxy resin as a main component is suitable, and an apparatus for injecting the same is introduced, but in the present invention, the reinforcing chemical solution has a size of cracks. It is designed so that it can be injected and filled according to the area of the storage space inside the crack and that the piston can be operated easily.

The present invention for achieving the above object will be described in detail with reference to the accompanying drawings. The front cap 3 is screwed to the front side of the cylindrical case 1 with the packing 2 interposed, and the nozzle 4 of the front cap 3 is attached to the cracked concrete structure. Further, a piston body 6 in which a rubber material piston 5 is coupled is elastically mounted inside a cylindrical case 1 by a spring, and a traction ring 9 attached to a rear end of a guide cylinder 8 pulled out from a central portion of a rear cap 7 is drawn. The spring is compressed by this and the piston body 6 is retracted, and the reinforcing chemical liquid injected into the front inside of the cylindrical case 1 is pushed out by the elastic force of the spring to inject the reinforcing chemical liquid into the crack from the nozzle 4. There is.

A flange 10 is provided on the rear side of the cylindrical case 1.
The rear cap 7 is screwed to the threaded portion 11 formed on the rear side of the flange 10 on the side of. The rubber material piston 5 is located on the side of the chamber for containing the reinforcing chemical liquid, the support plate 22 is provided on the tip side of the piston rod 21, and the mounting piece 23 is projected from the center of the support plate 22. A mountain 24 is engraved, and the rubber material piston 5 is screwed into and attached to the mounting piece 23. This rubber material piston 5 and piston rod 21
And constitute the piston 25.

The piston rod behind the piston 25
A piston guide 18 having an outward flange 30 is externally fitted to the tip of the guide cylinder 8 at 21, and the piston guide 18 is slidably provided on a piston rod 21. Piston body 6
Consists of a piston 25 and this piston guide 18, and an elongated hole 32 in the axial direction is engraved in the guide cylinder 8 of the piston guide 18, and an engaging pin 33 is projected on the base end of the piston rod 21 to extend the length. It is inserted in the hole 32.

Further, a pressure adjusting tool 35 is screwed to the screw thread 34 on the outer peripheral surface of the guide tube 8 toward the outward flange 30, and a circular spring restricting ring 36 is externally fitted and installed in the middle portion. Two springs 37 and 38 are installed in front of and behind the spring restriction ring 36, with a spring 37 with a weak elastic force on the front side and a spring with a strong elastic force on the rear side.
Install 38. Reference numeral 41 is a spring bearing member for the strong spring 38.

A spring 37 having a weak elastic force on the front side is elastically provided between the pressure adjusting tool 35 and the spring regulating ring 36,
The elastic force can be adjusted as the pressure adjuster 35 is moved and adjusted forward and backward on the screw thread 34, and a large number of protruding stoppers 39 projecting on the guide cylinder 8 face each other at equal intervals. It is formed in multiple stages and is moved to the rear inside of the cylindrical case 1 by grasping the pulling ring 9 and pulling the guide tube 8 backward and hooking the selected stopper 39 on the cross-shaped center hole 40 of the rear cap 7. By making it possible to fix the springs 37 and 38, it is possible to efficiently carry out preparation for repair work such as filling work of the reinforcing chemical liquid.

The process of repairing cracks in a concrete structure according to the present invention will be described below. First, for filling the inside of the cylindrical case 1 with the reinforcing chemical liquid, the front cap 3 is disassembled from the front of the cylindrical case 1, the pulling ring 9 is grasped and the piston body 6 is pulled, and at the same time, the selected stopper 39 is attached to the rear cap 7. The rubber material piston 5, which is screwed to the front end of the piston body 6, is fixed in a properly retracted state. The cylindrical case 1 whose front is opened can be filled with a reinforcing chemical liquid in which an epoxy resin and a curing agent are mixed in an appropriate ratio, but at this time, a small amount is required due to the carelessness of an operator who excessively adds the reinforcing chemical liquid. When the reinforcing chemical liquid spills into the cylindrical case 1, the flange 10 annularly provided on the outer periphery on the rear side of the cylindrical case 1 removes the reinforcing chemical liquid flowing down along the outer peripheral wall and is screwed to the rear screw portion 11 thereof. This shows the effect of preventing cases such as the case 7 from being attached and preventing the rear case 7 from becoming a consumable item.

As described above, when filling the inside of the cylindrical case 1 with the reinforcing chemical liquid, the concentration of the reinforcing chemical liquid is mixed lightly or densely according to the size of cracks formed in the concrete structure, and the injection pressure is weak or strong. Alternatively, a composite pressure must act on the piston body 6. Reinforcing chemicals with a low concentration should be injected into the microcracks, and such microcracks require a relatively small amount of the reinforcing chemicals because the area of the receiving space inside them is small. The reinforcing chemical liquid can be injected to the deep layer only by using the weak pressure.

Therefore, when it is desired to repair fine cracks in the concrete structure, the pressure adjusting tool 35 is brought close to the outward flange 30, and the rubber material piston 5 is used.
When it is properly retracted and filled with the reinforcing chemical liquid, the spring 37 with a weak elastic force is completely compressed between the pressure adjustment tool 35 and the spring restriction ring 36, and the spring with a strong elastic force is 38 is present in a slightly compressed state, and when the nozzle 4 is connected to the concrete structure in this state, and then the stopper 39 is released from the center hole 40 of the rear cap 7, the start is completely completed. While the piston body 6 is press-fitted by the elastic force of the spring 38 having a stronger elastic force than the spring 37 having a weak elastic force, the elastic force of the spring 37 having a weak elastic force is later. Due to the force, the reinforcing chemical solution is gradually pressed into the fine cracks, and a large amount is momentarily injected into the fine cracks. Effect It is those that will be able to complete perfect in manner.

Further, when a relatively large crack is generated in the concrete structure, it is preferable to use a reinforcing chemical liquid having a high concentration, and it is necessary to inject the reinforcing chemical liquid to a deep layer only when the injection pressure is strong. it can. Therefore, in such a case, if the pressure adjuster 35 screw-assembled to the screw thread 34 of the guide tube 8 is rotationally adjusted and retracted, the spring 37, which is blocked by the spring 38 having a strong elastic force, is repulsed. When the piston body 6 is retracted in such a state that the elastic force cannot be applied, the spring 38 having a strong elastic force is elastically contracted. In the case of a large crack, since the area of the internal space is large and the filling amount of the reinforcing chemical liquid must be large, the piston body 6 is retracted until the spring 38 having a strong elastic force is almost completely compressed. Nozzle 4 should be filled and filled with a large amount of reinforcing chemicals later.
If the stopper 39 is released from the central hole 40 after coupling, the reinforcing agent liquid having a high concentration is injected into the large crack with sufficient injection pressure due to the elastic action of the spring 38 having a strong elastic force. It will be able to perfectly carry out the repair of large cracks.

That is, the pressure adjuster 35 is attached to the outward flange.
A spring with a weak elastic force that is close to 30 37
To inject a reinforcing chemical liquid, or a pressure adjustment tool
Since the reinforcing chemical liquid can be injected by the action of the spring 38 having a strong elastic force while the 35 is separated from the outward flange 30, the replenishing work can be performed according to the repairing work of the fine cracks and the large cracks.

According to the present invention as described above, both a spring having a weak elastic force and a spring having a strong elastic force are elastically mounted, and the injection pressure can be selectively adopted according to the size of the crack and the concentration of the reinforcing chemical liquid, and the repairing can be performed. Work can be performed reasonably. Next, facilitating the piston operation of the present invention will be described. When the reinforcing chemical liquid is stored in the cylindrical case 1, as shown in FIG.
Pulled by the tow ring 9 against 37/38, the guide tube 8
The stopper 39 is hooked on the cross hole 40 of the rear case 7 and stopped. In this case, piston body 6 is spring 37
Stopped in the state of being urged at 38. Rubber material piston 5
Then, the reinforcing chemical liquid is injected into the cylindrical case 1 which has retreated to become a void.

Subsequently, with the piston guide 18 kept as it is, the engaging pin 33 of the piston rod 21 is grasped and moved in order to move only the piston 25 upward in the drawing. As shown in FIG. 3, the engagement pin 33 of the piston rod 21
Moves in the long hole 32 of the guide cylinder 8 and presses the reinforcing chemical solution contained in the cylindrical case 1 from the nozzle 4 to inject it into the crack of concrete.

The elongated hole 32 of the guide cylinder 8 is set so that the engagement pin 33 does not interfere with the guide cylinder 8 when the reinforcing chemical liquid is squeezed out of the cylindrical case 1 by the piston 25. The length of the long hole 32 is set so that the support plate 22 of the piston rod 21 can be sufficiently engaged with the outward flange 30 of the guide cylinder 8 when the springs 36 and 38 are compressed by the piston body 6.

In this case, the rubber material piston 5 is drawn in order to store the reinforcing chemical in the cylindrical case 1, but the springs 37 and 38 are engaged with the stopper 39 of the guide tube 8 and the cross hole 40 of the rear case 7. Therefore, it suffices that the engagement pin 33 is simply gripped and pulled only by the piston 25, the piston 25 can be easily pulled, and the operator can easily operate the piston.

The present invention also provides a spring having a weak elastic force.
The seating surface of the pressure adjusting tool 35 at the end of 37, the seating surface of the spring restricting ring 36, the seating surface of the spring restricting ring 36 at the end of the spring 38 having a strong elastic force, and the seating surface of the spring receiving member 41 are respectively projected. (Not shown) and set the spring 37
・ Engage the 38 end with the protrusion. Alternatively, attach the end of the spring 37, which has a weak elastic force, to the pressure adjusting tool 35 and the spring receiving member.
The spring 38, which is strongly fitted to the spring 41, is strongly fitted to the spring restriction ring 36 and the spring receiving member 41.

In any case, the rotational force of the piston body 6 acts so that the pressure adjuster 35, the spring restricting ring 36, and the spring receiving member 41 do not rotate but stand still. Then, when the piston body 6 is rotated, the pressure adjusting tool 35 is threaded.
Since it is screwed to the 34, it moves downward or upward depending on the rotation direction of the piston body 6. Pressure regulator
When 35 moves downward, the springs 37 and 38 are compressed to increase the urging force, and when the pressure adjuster 35 moves upward, the springs 37 and 38 extend and the urging force decreases.

When the reinforcing chemical solution is stored in the cylindrical case 1, the piston body 6 moves backward due to the weight of the reinforcing chemical solution itself.
The biasing force can be adjusted by rotating the piston body 6. The piston body 6 has a piston 25 and a piston guide 18
Although an example in which the member is divided into two members has been described, the same applies to the case of an integrated body.

[0026]

As described above, according to the present invention, the piston body 6 biased by the spring is slidably provided in the cylindrical case 1 and the piston body is compressed against the biasing force of the spring. 6 is pulled and engaged to stop the piston body 6, and the reinforcing chemical liquid is stored in the cylindrical case 1 which is vacant by the pulling operation of the piston body 6, and the piston body 6 is slid in the biasing direction of the spring. In a reinforcing agent injection device for repairing concrete cracks, which is moved to inject a reinforcing agent into a crack of concrete, the piston body 6 extends from a center to a spring side with a rubber material piston 5 positioned on the accommodation chamber side. A piston 25 composed of a rod 21 and a guide cylinder 8 for guiding the piston rod 21 extending from an outward flange 30 with which the rubber material piston 5 engages. A concrete crack repair consisting of a ton guide 18 and an axially long hole 32 formed in the guide cylinder 8 and an engaging pin 33 protruding from the base end of the piston rod 21 and inserted into the long hole 32. Since it is a reinforcement chemical injection device, when there are many work places, in order to reduce the fatigue of the worker, when the piston body is drawn and the spring is kept compressed, the reinforcement body liquid is pressed out and then the piston body is drawn. The biasing force of the spring did not work.

Further, according to the present invention, the piston body 6 biased by the spring is slidably provided in the cylindrical case 1, and the spring is compressed against the biasing force of the spring to pull the piston body 6 into engagement. Then, the piston body 6 is stopped, the reinforcing chemical liquid is stored in the cylindrical case 1 which is vacant by the pulling operation of the piston body 6, and the piston body 6 is slid in the urging direction of the spring to remove the concrete. In a reinforcing chemical liquid injecting device for repairing a concrete crack in which a reinforcing chemical liquid is injected into a crack, a pressure adjusting tool 35 is screwed on the tip side of the piston body 6, and a spring is seated on the pressure adjusting tool 35 to form a cylindrical case. 1 and the spring seating portion is provided with a protrusion so that the spring end portion is engaged with the protrusion or the spring end portion is strongly externally fitted to the pressure adjusting member 35 so that the pressure adjusting member 3 Since the reinforcing chemical liquid injection device for repairing the concrete crack prevents the pressure adjuster 35 from rotating even when the rotational force of the piston body 6 acts on the piston 5, the urging force that urges the piston body after containing the reinforcing chemical liquid. Can be easily adjusted.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a specific example of a chemical injection device for concrete crack repair of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which a piston body according to a use example of the present invention is drawn and a spring is compressed.

FIG. 3 is a vertical cross-sectional view showing a state in which the reinforcing chemical liquid is squeezed out by the piston while the spring of the embodiment of use of the present invention is compressed.

FIG. 4 is a front view showing a state where injection of the reinforcing chemical liquid of the present invention is completed.

[Explanation of symbols]

 1 ... Cylindrical case 6 ... Piston body 5 ... Rubber material piston 21 ... Piston rod 25 ... Piston 30 ... Outward flange 8 ... Guide tube 18 ... Piston guide 32 ... Long hole 33 ... Engagement pin

Claims (2)

(57) [Claims] 1. A piston body (6) urged by a spring is slidably provided in a cylindrical case (1), the spring is compressed against the urging force of the spring, and the piston body (6) is pulled toward and engaged with the piston body. 6 is stopped, the reinforcing chemical liquid is accommodated in the cylindrical case 1 which is vacant by the pulling operation of the piston body 6, and the piston body 6 is slid in the urging direction of the spring to reinforce the concrete chemical liquid in the crack of the concrete. In the reinforcing chemical liquid injecting device for repairing concrete cracks, the piston body 6 is composed of a piston 25 and a piston rod 21 extending from the center to the spring side with the rubber material piston 5 positioned. A piston guide 18 formed by extending a guide cylinder 8 for guiding a piston rod 21 from an outward flange 30 located on the rubber material piston 5 side, The piston guide 18 is externally fitted to the piston rod 21 of the stone 25, the piston guide 18 is slidably provided on the piston rod 21, and the spring is externally fitted to the guide cylinder 8 of the piston guide 18, and the guide cylinder 8 is provided. A reinforcing chemical injection device for repairing concrete cracks, in which a long hole 32 in the axial direction is engraved on the base plate, and an engaging pin 33 is projected from the base end of the piston rod 21 and inserted into the long hole 32. 2. A piston body 6 urged by a spring is slidably provided in a cylindrical case 1, the spring is compressed against the urging force of the spring, and the piston body 6 is pulled toward and engaged with the piston body. 6 is stopped, the reinforcing chemical liquid is accommodated in the cylindrical case 1 which is vacant by the pulling operation of the piston body 6, and the piston body 6 is slid in the urging direction of the spring to reinforce the concrete chemical liquid in the crack of the concrete. In the reinforcing chemical liquid injecting device for repairing concrete cracks, a pressure adjusting tool 35 is screwed to the tip end side of the piston body 6, and a spring regulating ring 36 is externally fitted to an intermediate portion of the piston body 6, The spring receiving member 41 is installed on the base end side of the body 6, and the springs 37 and 38 are externally fitted to the piston body 6, and the spring 37 is attached to the pressure adjusting tool 35 and the spring restricting ring 36. The ring 38 is seated on the spring restricting ring 36 and the spring receiving member 41 to be housed in the cylindrical case 1, and a protrusion is provided on the seat of the spring so that the end of the spring is engaged with the protrusion or the seat of the spring is attached. A reinforcing chemical liquid injection device for concrete crack repair, which is externally fitted to the member so as not to rotate the pressure adjusting tool 35 even when the rotational force of the piston body 6 acts on the pressure adjusting tool 35.