JPH0512504B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is a method of injecting a reinforcing chemical solution mainly composed of epoxy resin into the cracks in order to repair cracks that have occurred on the walls or bottom of concrete structures. This invention relates to a reinforcing chemical injection device for repairing concrete cracks, which is used to fill and repair cracks.

``Prior art'' Conventional reinforcing chemical injection devices for repairing concrete cracks are disclosed in Japanese Utility Model Application Publication No. 126659/1983, ``Automatic Chemical Injection Device for Fine Cracks in Concrete Buildings,'' and Japanese Patent Application Laid-Open No. 61-4566, ``Concrete ``Automatic injection device for repairing chemicals for building walls'', Utility Model No. 61-146346
There is an automatic injection device for repairing chemicals for walls of concrete buildings, which is used to adjust the injection amount and pressure of reinforcing chemicals, and to store and store the main agent and hardening agent of reinforcing chemicals, which are necessary at repair work sites. These problems have not yet been completely solved, and the present invention solves these problems.

"Summary of the Invention" In particular, the present invention mixes reinforcing chemicals at a lighter or higher concentration depending on the size of cracks that have occurred in a concrete structure, and also adjusts the injection pressure of the reinforcing chemicals to a weaker pressure depending on the concentration of the reinforcing chemicals. The purpose of this method is to rationally inject and fill the reinforcing chemical solution deep into the crack, focusing on the fact that it must be injected with force or with strong pressure. In order to satisfy this purpose, a piston body to which a rubber piston is attached is mounted inside a cylindrical case that also serves as a cylinder, and a spring regulating ring is placed on the rod of the piston body when the piston body is elastically supported by a spring. A spring with a weak elastic force and a spring with a strong elastic force are installed in front and rear of this spring and the regulating ring, and the elastic force of these two springs is operated rationally and in a combined manner to strengthen it. This system allows crack repair work to be completed efficiently by applying a weak or strong chemical injection pressure.

"Means for Solving the Problems" In order to solve the above problems, the present invention has a configuration in which an auxiliary cylindrical case is connected to the rear of the cylindrical case to extend the cylindrical case, and a large amount of reinforcing chemical solution is applied to the cylindrical case. To enable injection and filling so that repair work for cracks with deep or large receiving spaces can be completed in a single injection process. On the other hand, there may be cases where the receiving space inside the crack is larger than expected and the reinforcing chemical injection process described above cannot be completed in one go and a small amount of reinforcing chemical needs to be replenished, or the space inside the crack is smaller than expected. If a small and small amount of reinforcing chemical liquid must be injected, the usable length of the cylindrical case itself is reduced so that a small amount of reinforcing chemical liquid can be injected only with the cylindrical case itself with the auxiliary cylindrical case removed. By using a piston body and a spring, cracks that require replenishment or injection of a small amount of reinforcing chemical can be efficiently repaired. Another object of the present invention is to isolate the middle part of the inside of the cylindrical case with a rubber piston, fill and store an epoxy resin liquid on both sides of this, that is, the front inside of the rubber piston, and fill and store a modified polyamide amine in the rear inside. The structure is such that a hardening agent container containing a hardening agent is stored and stored, and the reinforcing chemical solution is stored inside a cylindrical case, and the hardening agent container is stored in the epoxy resin liquid at the repair work site. By adding and mixing agents, a reinforcing chemical solution can be instantly produced on-site, allowing repair work to be carried out quickly.

In general, concrete structures exhibit a phenomenon in which the concrete itself hardens continuously and gradually over time. Cracks occur in the concrete structure itself due to the shrinkage effect caused by such a hardening phenomenon, and the cracks that occur cause the waterproofing function of the concrete structure to deteriorate and durability to be lost. As a means to prevent such a phenomenon, it is necessary to prevent the functional deterioration of the concrete structure by plugging the cracks that have occurred. As a reinforcing agent to satisfy these points, a reinforcing liquid containing epoxy resin as the main ingredient is suitable, and a device for injecting it has been introduced, but in the present invention, the reinforcing chemical liquid is applied to the size of the crack. The purpose of enabling injection and filling according to the area of the storage space inside the crack can be accomplished more rationally and efficiently.

``Embodiments'' The present invention, which aims to achieve the above objects, will be described in detail with reference to the accompanying drawings.

Screw the front cap 3 onto the front side of the cylindrical case 1 with the packing 2 interposed, and assemble the attachment pipe body 4 with the attachment sheet 4' to the nozzle portion 3' of the front cap 3 using a screw method. Installed attached to the concrete structure W where the problem occurred. Also, a piston 6 to which a rubber piston 5 is connected is resiliently mounted inside the cylindrical case 1 by a single spring, and a piston rod 6' is pulled out from the center of the rear cap 7.
the piston body 6 such that the spring is shortened by means of pulling the traction ring 8 formed on the piston body 6;
Then, the rubber piston 5 is moved back 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, and the reinforcing chemical liquid is delivered to the nozzle portion 3'.
The structure is such that the reinforcing chemical solution is injected into the crack by being forced out through the pressure hole 4'' of the attachment sheet 4'.

A flange 1' is provided on the rear side of the cylindrical case 1, and a threaded portion 1b is formed on the rear side of the flange 1'.
The front threaded portion 9' of the auxiliary cylindrical case 9 has a length of approximately 1/2 to 1/3 of the length of the cylindrical case 1.
and the rear cap 7 is screwed to the rear threaded part 9'' of the cylindrical case 1.
the length of which is substantially extended.

The threaded portion 1b formed at the rear of the cylindrical case 1 of the present invention is configured to be coupled to the front threaded portion 9' of the auxiliary cylindrical case 9, and the rear cap is coupled to the rear threaded portion 9'' of the auxiliary cylindrical case 9. It is configured so that it can be combined with 7.

The front portion of the piston body 6 of the present invention is configured to have a diameter larger than the diameter of the piston rod 6' to form a threaded portion 6a, and a pressure regulator 10 is screwed to this threaded portion 6a. Further, after installing a circular spring regulating ring 11 on the piston rod 6', two springs are elastically installed in front and rear of this spring regulating ring 11, and a spring 12 with a weak elastic force is attached to the front side. A spring 13 with a strong elastic force is installed on the rear side.

The spring 12, which has a weaker elastic force on the front side, is elastically installed between the pressure regulator 10 and the spring regulating ring 11, and its elasticity increases as the pressure regulator 10 is moved forward and backward on the threaded portion 6a. To make it possible to adjust the thrust force, a large number of protruding stoppers 6b are formed on the piston rod 6' in multiple stages at equal intervals and grip the traction ring 8 to pull the piston rod 6' rearward. By hooking the selected stopper 6b to the center hole of the rear cap 7, the rubber piston 5 that has been moved to the rear inside the cylindrical case 1 can be fixed. Preparation for repair work can be carried out efficiently.

In addition, as in the embodiment shown in FIG. 3, the cylindrical case 1
Although it is possible to carry out repair work by itself,
The length of the piston rod 6' of the piston body 6 used in this embodiment is short, corresponding to the length of the cylindrical case 1, and the length of the spring is also short, but it has a strong elastic force. Spring 13'
It is preferable to keep it short.

Furthermore, as in the embodiment shown in FIGS. 9 and 10, the reinforcing chemical solution can be stored and stored with the rubber piston 5 mounted inside the cylindrical case 1, so that the reinforcing chemical solution can be obtained at the repair work site. It is intended to do so. In this embodiment, the front side of the rubber piston 5 is a main agent storage chamber A that stores the epoxy resin liquid, and the rear side is a hardening agent storage chamber A that stores a hardening agent container 14 that stores a hardening agent such as modified polyamide amine. It is defined as room B. A cover 15 is sealed to the rear threaded part 1b by screw connection, and the cylindrical case 1
The nozzle portion 3' of the front cap 3 screwed to the front threaded portion 1a of the device is sealed with a cap 16 to facilitate portability and storage.

The process of repairing cracks in a concrete structure W using the present invention as described above will be explained as follows.

First, an embodiment in which the auxiliary cylindrical case 9 is coupled to the rear side of the cylindrical case 1 is assembled as shown in FIG. Cylindrical case 1 of this example
The process of filling the inside with the reinforcing chemical is as shown in Fig. 4: dismantle the front cap from the front of the cylindrical case 1, grab the traction ring 8 and pull the piston rod 6', and at the same time move the selected stopper 6b to the rear cap. By engaging the center hole 7, the rubber piston screwed to the front end of the piston body 6 is fixed in an appropriately retracted state. The reinforcing chemical liquid cylinder 17 of the cylindrical case 1 with its front end open can be filled with reinforcing chemical liquid containing an appropriate ratio of epoxy resin and curing agent. If a small amount of reinforcing chemical spills onto the cylindrical case 1 due to carelessness, a flange 1' provided around the rear outer periphery of the cylindrical case 1 removes the reinforcing chemical flowing down the outer peripheral wall and removes the reinforcing chemical from the rear threaded portion. This shows the effect of preventing the case where the auxiliary cylindrical case 9 that is screwed to the auxiliary cylindrical case 9 becomes a consumable item.

When filling the inside of the cylindrical case 1 with the reinforcing chemical as described above, the concentration of the reinforcing chemical is mixed in a lighter or higher concentration depending on the size of the cracks formed in the concrete structure W, and the injection pressure is also adjusted. A weak or strong or mixed pressure must be exerted on the piston body 6. A reinforcing chemical liquid with a light concentration should be injected into the fine cracks d, and since such a fine crack d has a small internal receiving space, a relatively small amount of reinforcing chemical liquid is required, and at the same time the injection pressure The reinforcing chemical solution can be injected deep into the body only by using relatively weak pressure.

Therefore, when attempting to repair microcracks d in the concrete structure W, the pressure regulator 10 is brought close to the piston body 6, and the piston body 6 is
When the reinforcing chemical solution is filled by appropriately retreating the spring 12, the spring 12 with a weak elasticity is completely compressed between the pressure regulator 10 and the spring regulating ring 11, and the spring 13 with a strong elasticity is compressed. comes to exist in a slightly elasticized state (see Figure 6), and in this state the concrete structure W
Attachment pipe body 4 of attachment sheet 4' adhered and fixed to
If the nozzle 3' is screwed to the nozzle 3', and then the stopper 6b is released from the center hole of the rear cap 7, the spring 13, which has a stronger elasticity than the completely compressed spring with a weak elasticity, will eject. While the piston body 6 and the rubber piston 5 are press-fitted by force, the reinforcing liquid is gradually press-fitted into the fine cracks d by the elastic force of the spring 12, which has a weak elastic force. By doing so, a large amount of reinforcing chemical solution can be instantaneously injected into the fine cracks d, and the reinforcing chemical solution can be filled to the deep layer of the crack without the problem of clogging, and the repair can be completed efficiently and completely. It is.

In addition, if a relatively large crack D occurs in the concrete structure W as shown in Figs. 7 and 8, it is preferable to use a reinforcing chemical with a high concentration, and the injection pressure must also be strong. Reinforcing chemical solution can be injected deep into the body.

Therefore, in the case of such an embodiment, if the pressure regulator 10 screwed onto the threaded portion 6a of the piston body 6 is moved back using means for adjusting rotation, the spring 13 having a strong elastic force will prevent the pressure regulator 10 from being retracted. The spring 12, which has a strong elastic force, is elastically compressed and exists in a state where it cannot apply an elastic force.If the piston body 6 is moved back in such a state, only the spring 13, which has a strong elastic force, will be elastically compressed. It becomes a state of contraction.
In the case of a large crack D, since the area of the internal space is large, a large amount of reinforcing chemical must be filled, so the piston body is moved back until the spring 13, which has a strong elasticity, is almost completely compressed. Afterwards, a large amount of reinforcing chemical solution should be injected and filled. Then, after screwing the nozzle part 3' to the attachment tube 4 of the attachment sheet 4', releasing the stopper will cause the spring 13, which has a strong elasticity, to spring. Because the highly concentrated reinforcing liquid is injected into the large crack D under a sufficient injection pressure by the action of force, the large crack D can be completely repaired.

On the other hand, while the auxiliary cylindrical case 9 is connected to the rear side of the cylindrical case 1 as described above and the repair work is in progress, the volume of the internal space of the crack increases.
If you want to replenish and inject reinforcing fluid because the amount is larger than the amount filled inside, disassemble the auxiliary cylindrical case 9 at the rear of the cylindrical case 1, and attach a piston body 6 with a short piston rod to the rubber piston 5. Then, the rear cap 7 is connected to the rear threaded portion 1b and used. At this time, in the embodiment, a short spring 1 with a strong elastic force is
By using 3', the injection pressure of the reinforcing chemical solution can be selected.

That is, in this embodiment as well, the pressure regulator 1
0 is placed close to the piston body 6, and the reinforcing chemical liquid is injected by the action of the spring 12 with a weak elastic force, or the pressure regulator 10 is placed close to the piston body 6.
Spring 1 with strong elasticity when isolated from
Since the reinforcing chemical solution can be injected by the action of 3, the replenishment work can be carried out in accordance with the repair work of the fine cracks d and the large cracks D.

Furthermore, the configuration of the embodiment shown in FIGS. 9 and 10 is such that the epoxy resin liquid, which is the main ingredient of the reinforcing chemical, and the curing agent are stored and stored in a separated state inside the cylindrical case 1, and the reinforcing chemical is used for repair. This is an example that can be obtained on the job site. In this embodiment, after the rubber piston 5 is positioned at the middle position inside the cylindrical case 1, the epoxy resin liquid is stored in the front main resin storage chamber A, and the hardening agent container is stored in the rear hardening agent storage chamber B. After the main agent storage chamber A and hardening agent storage chamber B are sealed using the front cap 3, cap 16, and cover 15, the reinforcing chemical solution can be stored inside the cylindrical case 1 for a long period of time. can.
Furthermore, it is easy to carry and transport, and any worker at the repair work site can obtain the reinforcing chemical solution, and can quickly perform preparatory work for the repair work.

That is, in the mixing process of the reinforcing chemical solution, as shown in FIG. The rubber material piston 5
After the rubber piston 5 is moved slightly backward and the front cap 3 is disassembled, the hardening agent stored in the hardening agent container 14 is poured into the main agent storage chamber A. This makes it possible to manufacture a reinforcing chemical solution in which the main agent and hardening agent are mixed in the proper ratio, so that the necessary materials for repair work can be obtained at the repair work site, which has the effect of speeding up the repair work.

The present invention as described above has a configuration in which an auxiliary cylindrical case is connected to the rear of the cylindrical case, and it is possible to fill a relatively large amount of reinforcing chemical liquid and use it, and it is also possible to use a spring with a weak elastic force and a spring with a strong elastic force. In addition, the injection pressure can be selectively selected according to the size of the crack and the concentration of the reinforcing chemical, which not only makes it possible to carry out repair work rationally, but also allows the main agent and hardening agent to be placed inside the cylindrical case. It has a structure in which the chemical is stored and stored in an isolated state, and has great effects such as allowing anyone to produce reinforcing chemicals at the repair work site of concrete structures, allowing repair work to be carried out quickly.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the present invention, Figs. 2 and 3 are cross-sectional views showing examples of use of the present invention, and Fig. 4 is a concrete reinforcing chemical solution injected into the device of the present invention.
Cross-sectional views showing the state of filling, Figures 5 to 8
Figure 9 is a sectional view of an operating state showing an embodiment of repairing cracks in a concrete structure using the present invention.
The figure is a cross-sectional view of an embodiment in which the main ingredient of a reinforcing chemical solution and a curing agent are stored in a cylindrical case of the present invention in a separated state. It is a process diagram showing the order of mixing a base agent and a hardening agent to produce a reinforcing chemical solution.

Claims (1)

[Scope of Claims] 1. Both openings of a cylindrical body formed by connecting an auxiliary cylindrical case 9 to a cylindrical body case 1 are resiliently mounted inside the cylindrical body which is closed by a front cap 3 and a rear cap 7. Cylindrical case 1
A flange 1' is provided on the rear side of the rear threaded part 1b.
An auxiliary cylindrical case 9 is screwed to the cylindrical case 1 to extend the internal space of the cylindrical case 1. A rubber piston 5 is connected to the front of the piston body 6 to press out the reinforcing chemical solution, and the rear of the piston body 6 The piston rod 6' has a long piston rod 6' in which a threaded part 6a to which the pressure regulator 10 is screwed and a protruding stopper 6b are opposed and protruded at equal intervals, and a spring regulating ring is mounted on the piston rod 6'. 11 installed,
A spring 12 with a weak elastic force and a spring 1 with a strong elastic force are placed in front and behind the spring regulating ring 11.
3, and the rear cap 7 is provided with a center hole through which the stopper 6b passes and is caught. 2. In a device that has a piston structure elastically installed with a spring inside the cylindrical case 1, which is closed by the front cap 3 and the rear cap 7, to force out the reinforcing chemical liquid, there is a A flange 1' is arranged around the rear cap 7, and a rear cap 7 is connected to the rear threaded portion 1b.A rubber piston 5 is connected to the front of the piston body 6 to press out the reinforcing chemical solution, and a rear cap 7 is connected to the rear threaded portion 1b. A threaded portion 6a to which the pressure regulator 10 is screwed and a protruding stopper 6b
constitute a piston rod 6' which faces and protrudes at equal intervals, and the piston rod 6' is equipped with a piston body 6 having a length approximately equal to the length of the cylindrical case 1, and a spring is mounted on the piston rod 6'. Install the regulation ring 11 and press the spring regulation ring 1.
A spring 12 with a weak elastic force and a short spring 13 with a strong elastic force are installed in front and rear of the cap 1, and a center hole is provided in the rear cap 7 through which the stopper 6b passes and is hooked. A reinforcing chemical injection device for repairing concrete cracks, which is characterized by: