JP2003064786A - Method and apparatus for injecting repairing agent at joint portion of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for infilling a repairing agent at a joint portion of a structure, which extremely facilitates its pretreatment, and does not mar the appearance of the structure, and to provide an apparatus for infilling the same. SOLUTION: The joint portion of the structure is formed by connecting a plurality of PC plates 1, 1 to each other by a fastener consisting of a fastening bolt 2 and fastening nuts screwed onto screw portions of the fastening bolt 2. The apparatus for infilling the repairing agent at the joint portion of the structure, is comprised of enclosure introducing nuts 3 screwed onto the fastening bolt, in place of the fastening nuts, and an injecting pump 4 for press-fitting the repairing agent into the enclosure introducing nuts 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for filling a repair agent in a joint portion of a structure.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, in a reinforced concrete structure constructed by joining a precast concrete plate (PC plate) with fastening bolts B and fastening nuts N, the joining surfaces are in complete contact. In most cases, there is some gap G '. Further, there is a gap G ″ between the bolt hole H of the PC plate and the fastening bolt B. Rainwater or the like enters these gaps G ′ and G ″ to deteriorate concrete or reinforce (Not shown) or the fastening bolt B may be corroded and the structural strength may be reduced.
It needs repair. Such repairs are not limited to the concrete structures described above, and are not an exception for metal structures that are corroded by rainwater or the like, and wood structures that may be corroded.

[0003] Conventionally, when repairing a deteriorated or corroded portion of the reinforced concrete structure, an injection nozzle or the like is inserted into a portion of the gap G'appearing on the concrete surface to press-in a repair agent, or a gap in the PC board. An injection hole is formed from the outside toward G ′ and G ″, and an injection nozzle is attached to the injection hole to inject the repair agent into the gaps G ′ and G ″.

[0004]

However, the above-mentioned conventional repair techniques have problems that not only the pretreatment work such as the mounting of the injection nozzle and the drilling of the injection hole, but also the appearance of the structure is impaired. There was a point.

The present invention has been made in order to solve the above-mentioned conventional problems, and the purpose thereof is not only the pretreatment work is extremely simple, but also the appearance of the structure may be impaired. It is an object of the present invention to provide a method and a device for filling a repair agent in a joint portion of a structure that does not exist.

[0006]

According to a method of filling a repair agent in a joint portion of a structure of the present invention, the fastener is exposed at a joint portion of a structure formed by joining a plurality of structural members with a fastener. It is characterized in that the repair agent is pressed into the gap of the joint from the portion. The exposed portion of the fastener is a threaded portion of a fastening bolt and a fastening nut that is screwed into the threaded portion. Furthermore, the fastening nut is removed, the closing guide nut is screwed, and the repairing agent is pressed into the closing guide nut. Furthermore, the present invention is characterized in that a closing cup is adhered around the fastening nut, and a repair agent is press-fitted into the closing cup.

Further, the device for filling the repair agent in the joint portion of the structure of the present invention has a structure in which a plurality of structural members are joined by a fastener consisting of a fastening bolt and a fastening nut screwed to the threaded portion thereof. It is characterized by comprising a closing guide nut screwed in place of the fastening nut at a joint portion of the article, and a means for press-fitting a repairing agent into the closing guide nut. In addition, at a joint portion of a structure configured by joining a plurality of structural members with a fastener composed of a fastening bolt and a fastening nut that is screwed into a threaded portion thereof, a closing cup that is attached around the fastening nut. And a means for press-fitting a repair agent into the closing cup.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1A, reference numeral 1 is a PC plate, which is joined to each other by fastening bolts 2. Reference numeral 3 is a closing guide nut that is tightened into the fastening bolt 2 instead of the fastening nut, as shown in FIG.
As is clear from (C), the guide groove 3b is formed in a part (two positions in this embodiment) of the female screw 3a.

An injection pump 4 for the filler is provided with an injection nozzle 5 at the tip of the hose 4a. The injection nozzle 5 is inserted into an injection hole 3c formed in the closing guide nut 3. 6 is a packing that seals the gap between the PC plate 1 and the closing guide nut 3.

Since the repair agent filling device of the above embodiment is constructed as described above, the repair agent is injected from the injection pump 4 through the hose 4a and the injection nozzle 5 into the closing guide nut 3. It The repair agent injected into the closing guide nut 3 passes through the guide groove 3b formed in the closing guide nut 3 and fills the gaps G ″ and G ′.

The repair agent may be any of the commonly used liquid repair agents for injection. Specific examples include low-viscosity urethane, water-stopping agents such as water glass, reinforcing agents such as low-viscosity epoxy resin agents, and reinforcing bar corrosion inhibitors such as lithium nitrate solutions.

In the embodiment of FIG. 1 described above, the fastening nut that is screwed onto the fastening bolt 2 is removed and the closing guide nut 3 is tightened and fixed. However, there are cases where it is impossible or inappropriate to remove the fastening nut. In such a case, as shown in another embodiment of FIG. 2, the fastening nut N is left as it is, and the closing cup 7 is covered around it. The closing cup 7
Is pressed onto the PC board 1 by the jack 8 and the wedge 9.
A packing 10 seals a gap between the PC plate 1 and the closing cup 7. 4 is an injection pump, 4a is a hose, and 5 is an injection nozzle.

Therefore, the repair agent injected from the injection pump 4 through the hose 4a and the injection nozzle 5 into the closing cup 7 has a clearance between the PC plate 1 and the fastening nut N (including the washer) and the fastening bolt 2. And the clearances G ′ and G ″ are filled through the clearances of the threaded portions of the fastening nut N.

The structure of the present invention is not limited to the above PC concrete-based structure. For example, a separator part of cast-in-place concrete, a metal-based structure which may be corroded by water, water, etc. It may be a wood-based structure that may be corroded due to invasion of wood. Also,
The fastener of the present invention is not limited to the above fastening bolts and fastening nuts.

[0015]

According to the present invention, it is not necessary to directly attach the injection nozzle to the structure or to form the injection hole in the structure by press-fitting the repair agent from the exposed portion of the fastener into the internal gap. The pretreatment work is extremely simple, and there is no fear of impairing the appearance of the structure.

[Brief description of drawings]

FIG. 1 is an explanatory view (A) showing an embodiment of the present invention, a sectional view taken along the line YY, and a perspective view (C) showing a half section of a closing guide nut.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory view of a joint structure of general precast concrete.

[Explanation of symbols]

1 PC board 2 Fastening bolt 3 Closure induction nut 3a female screw 3b guide groove 3c injection hole 4 infusion pump 4a hose 5 injection nozzles 6 packing 7 Closure cup 8 jacks 9 wedge 10 packing

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[Procedure amendment]

[Submission date] November 16, 2001 (2001.11.
16)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akira Terayama             5-9-15 Shinmachi, Nishi-Tokyo, Tokyo Nippon Kayaku             Bassar Co., Ltd. F-term (reference) 2E125 AA53 AA70 AE02 AG11 AG20                       BA12 BB08 BD01 CA05 CA14                       EA01 EA26 EB12

Claims (6)

[Claims] 1. A repair agent, characterized in that, at a joint portion of a structure formed by joining a plurality of structural members with a fastener, a repair agent is press-fitted into a gap of the joint portion from an exposed portion of the fastener. Filling method. 2. The method of filling a repair agent according to claim 1, wherein the exposed portion of the fastener is a threaded portion of a fastening bolt and a fastening nut screwed with the threaded portion. 3. The method of filling a repair agent according to claim 2, wherein the fastening nut is removed, a closing guide nut is screwed on, and the repair agent is press-fitted into the closing guide nut. 4. The method for filling a repair agent according to claim 2, wherein a closing cup is attached to the periphery of the fastening nut, and the repair agent is pressed into the closing cup. 5. A closure, which is screwed in place of the fastening nut, at a joint of a structure formed by joining a plurality of structural members with a fastener consisting of a fastening bolt and a fastening nut screwed to a threaded portion thereof. A repair agent filling device comprising a guide nut and means for press-fitting the repair agent into the closed guide nut. 6. A joint of a structure formed by joining a plurality of structural members with a fastener consisting of a fastening bolt and a fastening nut screwed into a threaded portion of the fastening bolt, and is attached around the fastening nut. A repair agent filling device comprising a closing cup and means for press-fitting the repair agent into the closing cup.