JPH043069Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an injection device for injecting a filler into holes provided in a concrete structure to fill them.

[Conventional technology and its problems]

For example, in the construction of concrete structures,
In order to maintain a constant distance between opposing formworks, cylindrical separators are sometimes used, and after the formworks are dismantled, the separator portions remain as horizontal separator holes.

If left as is, such separator holes are unfavorable in terms of appearance and strength, so it is necessary to fill them by injecting mortar or a synthetic resin filler.

Conventionally, a method for injecting a filler into a horizontal separator hole involves using a manual or automatic injection tool, inserting the injection tool into the separator hole, and injecting the filler into the separator hole.

However, the above injection method has a problem in that cavities are generated inside the separator holes and the separator holes cannot be completely filled with the filler.

That is, when the filling material is extruded from the injection tool and filled into the separator holes, air is trapped at the inner end of the separator holes, which causes cavities.

[Purpose of invention]

This idea was made to solve the above-mentioned problems, and it involves filling the holes with a filling material.
It is an object of the present invention to provide an apparatus for injecting a filler into holes in a concrete structure, etc., which can be filled so as to prevent the formation of cavities.

[Means for solving problems]

In order to solve the above-mentioned problems, this invention consists of a filler injection device with a male thread provided on the outer periphery of the tip nozzle, and a piston member that is detachably attached to the tip nozzle of the injection device. The tool has an outer diameter that allows the cylinder to move in and out of a hole in a concrete structure, etc., and the piston member has an outer diameter that is press-fitted so that it can slide freely into a hole in a concrete structure, etc. The piston member is formed with a threaded hole provided in the center of the piston member to be screwed into the outer peripheral male thread of the tip nozzle of the injection device.

[Effect]

A piston member is attached to the tip of the injection tool, and the injection tool is inserted into the hole so that the piston member faces the inner end of the hole.

Since the piston member is slidably and tightly fitted into the hole, it compresses the air in the hole, but by increasing the pushing force, the compressed air flows from between the sliding surface of the hole and the piston member to the piston member. It deforms and flows out.

Rotate the injection tool with the piston member pressed against the inner end of the hole, detach the threaded connection part, and load the filler into the injection tool that is pulled out leaving the piston member at the inner end of the hole. When the tool is inserted into the hole again and the tip nozzle is threadedly connected to the piston member, and the injection tool is operated in this state to push out the filler material, the filler injected between the inner end of the hole and the piston member. The material causes the piston member to retract in proportion to the amount of injection, so that the filling material is injected without leaving a cavity in the hole.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIG. 1, the injection device of this invention is constituted by a combination of a filler injection tool 1 and a piston member 3 that is detachably attached to a tip nozzle 2 of the injection tool 1.

The injection tool 1 includes a piston 5 built into a cylinder 4 equipped with a nozzle 2 at the tip, and by moving the piston 5 in the axial direction with a handle 7 via a rod 6, the filling material is sucked into the cylinder 4. It has a manual pump structure that can perform both filling material and discharge.

As shown in FIG. 2, the piston member 3 is made of a material such as rubber, synthetic resin, or leather, and has a threaded hole 8 and a discharge port 9 connected to each other in the center to be externally fitted onto the male thread 2a of the nozzle 2. It is being

Incidentally, in order to improve the watertightness of the threaded portion with the nozzle 2, an O-ring 11 may be incorporated inside the nut 10 forming the screw hole 8.

As shown in FIGS. 3 to 6, the piston member 3 has an outer diameter that elastically fits into a separator hole B formed in the concrete structure A so as to be able to slide freely. The cylinder 4 of No. 1 is smaller than this and has an outer diameter such that it can freely enter and exit the separator hole B of the concrete structure A.

The injection device of this invention has the above-mentioned configuration. Next, injection of the filler C into the separator holes B will be explained.

First, the piston member 3 is screwed and attached to the tip nozzle 2 of the injection tool 1, and the injection tool 1 is inserted into the horizontal separator hole B whose one end is closed by a mold D or the like, as shown in FIG. At the same time, the piston member 3 is inserted.

At this time, the piston member 3 is inserted into the separator hole B.
Although the air inside is compressed, the high-pressure air deforms the sliding portion of the piston member 3 with the separator hole B and flows out to the outside.

As shown in FIG. 4, when the piston member 3 reaches the inner end of the separator hole B, the injection tool 1 is rotated, separated from the piston member 3, and extracted from the separator hole B, and the injection tool 1 is filled with epoxy resin or mortar. Filling material C, etc., is inhaled and loaded, the injection tool 1 is again inserted into the separator hole B, and the tip nozzle 2 is screwed onto the piston member 3 as shown in FIG.

In the state shown in FIG. 5, by pressing the handle 7 of the injection tool 1 and pressurizing the filler C inside, the filler C is injected into the separator hole B from the discharge port 9 of the piston member 3.

The filler C injected into the separator hole B from the discharge port 9 is press-fitted between the separator hole B and the piston member 3, so that the piston member 3 is filled with the filler C.
As a result, the piston member 3 and the injection tool 1 are pushed out from the separator hole B in proportion to the amount of the filler C that is press-fitted.

In this way, when the filler C is pushed out from the discharge port 9 of the piston member 3 with the piston member 3 joined to the inner end of the separator hole B, the inside of the separator hole B is filled with the filler C. Therefore, the filler C can be injected into the separator hole B without creating a cavity, and the injection work can be continued until the piston member 3 is removed from the separator hole B.

Although the drawing shows an example in which the filling material C is suction-loaded into the injection tool 1 after the piston member 3 is pushed into the inner end of the separator hole B, it is also possible to suction-load the filling material C into the injection tool 1 in advance. Then, after the piston member 3 is pushed in, the filler C may be continuously injected into the separator hole B.

〔effect〕

As described above, according to this invention, the cylinder of the injection tool has an outer diameter that allows it to freely enter and exit the hole in the concrete structure, and the tip nozzle of the injection tool has a
After installing a piston member with an outer diameter that is press-fitted into a hole in a concrete structure so that it can slide freely, it can be attached and detached with a threaded structure, and the piston member is inserted into the inner end of the hole in the concrete structure. Since the filler is injected, the filler can be injected without leaving any air inside the hole, and the hole is completely filled with the filler, resulting in no cavities and improved appearance and strength. This makes it possible to inject fillers with superior quality.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the injection device according to the invention, FIG. 2 is an enlarged cross-sectional view of the essential parts of the same, and each of FIGS. 3 to 6 is an explanatory view showing the filling material injection process. DESCRIPTION OF SYMBOLS 1... Injector, 2... Nozzle, 3... Piston member, 9... Discharge port, A... Concrete structure, B... Separator hole, C... Filler.

Claims (1)

[Scope of utility model registration request] It consists of a filler injection tool having a male thread on the outer periphery of the tip nozzle, and a piston member that is detachably attached to the tip nozzle of the injection tool, and the injection tool has a cylinder that can freely move in and out of a hole in a concrete structure, etc. The piston member is formed to have an outer diameter that is press-fitted so as to be able to slide freely into a hole in a concrete structure, etc., and the tip nozzle of the injection tool is placed in the center of the piston member. A device for injecting filler into a hole in a concrete structure, etc., which has a screw hole that screws into a peripheral male thread.