JP2004218281A - Injection plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection plug for efficiently and uniformly injecting an injection agent into a structure over a wide range by connecting an injector by using the injection plug in an inserted and arranged state inside the structure. <P>SOLUTION: This injection plug has a head 2 for forming an inside space 21 and connecting the injector, a bar-shaped injection body 3 continuously arranged in the head and inserted and arranged in an object for injecting the injection agent, a plurality of collar-shaped parts 31 formed overhangly to the outer periphery of the injection body, an injection central hole 32 formed to communicate the inside space of the head with the tip side of the injection body and passing the injection agent, and an injection side hole 33 formed so as to communicate the outer peripheral side of the injection body with the injection central hole. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an injection plug for injecting an injection agent for reinforcing a mortar wall of a building or a building, a concrete structure, or repairing cracks, cracks, and delaminations. The present invention relates to an injection plug that can efficiently and uniformly inject an agent.
[0002]
[Prior art]
When a mortar wall, a concrete structure, or the like of a building or a building has cracks, cracks, peeling, or the like, it is necessary to inject an injection agent into the cracks or the like to reinforce or waterproof. Conventionally, the injection port of the injector was pressed against a crack portion on the surface of the structure, and the other portion of the surface crack was sealed, and the injection material was injected into the crack. Examples of the filler include an inorganic material such as a cement type and a silicic acid type, and examples of the organic material include an epoxy resin, an acrylic resin, and a urethane resin.
[0003]
Further, as a method for performing such injection, a technique such as the following Patent Document 1 is known. Patent Literature 1 describes a concrete reinforcing method for reinforcing concrete by injecting a water glass-based concrete modifier solution into concrete.
[0004]
[Patent Document 1]
JP-A-2002-179479 [0005]
[Problems to be solved by the invention]
In the conventional injection method in which the injection port of the injector is pressed against a crack portion on the surface of the structure, it has been difficult to uniformly and evenly inject the injection agent deep into the crack or peeling gap. That is, in order to increase the injection range, it is necessary to increase the injection pressure. However, if the injection pressure is increased, the pressure resistance of the seal for preventing leakage of the injection agent becomes a problem. In addition, it is particularly difficult to increase the injection range with a highly viscous injection.
[0006]
Therefore, the present invention provides an injection plug that can be used in a state where it is inserted and arranged inside a structure or the like, connected to an injector, and can efficiently and uniformly inject the injection into the structure over a wide range. Aim.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an injection plug of the present invention has an internal space formed therein, a head for connecting an injector, and a head connected to the head and inserted into an object to be injected with an injection. A rod-shaped injection body to be disposed, a plurality of flanges formed to project on the outer periphery of the injection body, the inner space of the head and the tip side of the injection body. It has an injection center hole provided so as to communicate with the injection agent, and an injection side hole formed so as to communicate the outer peripheral side of the injection barrel with the injection center hole.
[0008]
In the above-described injection plug, it is preferable that the head has an internal thread formed on an inner peripheral side.
[0009]
In the above-described injection plug, it is preferable that the female screw on the inner peripheral side of the head is a multi-threaded screw. For example, a double thread, a triple thread, etc. can be used.
Further, in the above-described injection plug, it is preferable that the head and the injection body are formed integrally from a synthetic resin material.
[0011]
Further, in the above-described injection plug, it is preferable that the injection center hole is opened in a tip direction of the injection body, and is also opened in a side orthogonal to the tip direction.
[0012]
In the above-mentioned injection plug, the injection body may be made of metal.
[0013]
In the above-described injection plug, it is preferable that the head and the injection body are connected by a screw connection.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. 1 to 4 are views showing the configuration of the injection plug 1 of the present invention. FIG. 1 is a front view of the injection plug 1. FIG. 2 is a cross-sectional view of the injection plug 1 as viewed from the front. 3 is a view of the injection plug 1 as viewed from above in FIG. 1, and FIG. 4 is a view of the injection plug 1 as viewed from below in FIG. The injection plug 1 includes a substantially cylindrical head 2 and a rod-shaped injection body 3. The head 2 and the injection barrel 3 are integrally formed of a synthetic resin (for example, polypropylene resin, ABS resin, fluororesin, etc.).
[0015]
The head 2 has a concave internal space 21 whose upper surface is open. A female screw 22 is formed on the inner peripheral surface of the head 2 facing the internal space 21. A male screw formed on the distal end side of the injector 4 (see FIG. 7) is screwed to the female screw 22, and the head 2 and the injector 4 are connected. The female screw 22 is a double thread and has a large lead angle, so that the head 2 and the injector 4 can be connected with a small rotation angle. Note that the female screw 22 may be a multi-thread screw (three-thread screw or the like) other than the two-thread screw.
[0016]
The injection body 3 integrated with the head 2 is provided on the lower surface side of the head 2 and is formed in a rod shape (substantially cylindrical shape) smaller in diameter than the head 2. An injection center hole 32 is formed in the injection body 3 along the central axis. The injection center hole 32 communicates with the internal space 21 of the head 2, and also opens on the tip side of the injection barrel 3. The distal end side of the injection center hole 32 opens in the distal direction and also opens as a side opening 34 in a direction orthogonal to the distal direction. Further, the injection barrel 3 is provided with an injection-side hole 33 in a direction orthogonal to the central axis. The injection side hole 33 allows the injection center hole 32 to communicate with the outer peripheral side of the injection body 3. The injection-side holes 33 are provided at two positions on the circumference that are opposed by 180 degrees.
[0017]
The injection agent supplied from the injector 4 flows into the injection center hole 32 from the internal space 21 of the head 2 and is injected into the structure from the opening at the tip side of the injection center hole 32. Further, the injection agent is also supplied to the side of the injection barrel 3 through the injection side hole 33 communicating with the injection center hole 32, and is directly injected into the structure on the outer peripheral side of the injection barrel 3.
[0018]
The injection barrel 3 is provided with a plurality of flanges 31 formed so as to protrude to the outer periphery at substantially equal intervals in the axial direction. The above-described injection side hole 33 is disposed between the flanges 31. The flange 31 has a larger diameter than the outer circumference of the injection barrel 3. The injection plug 1 is fixed to an injection hole formed in the structure by the flange 31. The flange 31 also has a function of preventing the injection agent from flowing backward through the injection hole and leaking outside. The overall length of the injection plug 1 of this embodiment is about 50 mm.
[0019]
Next, a procedure for injecting an injection agent into the structure using the injection plug 1 of the present invention will be described. 5 to 7 are views showing a procedure for injecting an injection into the structure. FIG. 5 is a diagram showing a cross section of the structure 5 made of concrete or the like. This figure shows a case where a mortar layer 51 is formed on the surface side of the structure 5. In some cases, a tile is further attached to the outside of the mortar layer 51. In some cases, there is no mortar layer 51 and no tile layer (in this case, there is no peeling and only cracks are generated).
[0020]
Here, a crack 53 has occurred in the structure 5, and a peeling 52 has occurred between the mortar layer 51 and the structure 5. An injecting agent is injected and filled into the gaps between the cracks 53 and the exfoliations 52 to reinforce and repair the structure 5. In order to inject the injection material, first, as shown in FIG. 6, an injection hole 54 is formed by a drill or the like at a position where a crack 53 or peeling 52 of the structure 5 has occurred. At this time, the inner diameter of the injection hole 54 is made slightly smaller than the outer diameter of the flange 31 of the injection plug 1. Further, the depth of the injection hole 54 is set to be about 10 mm deeper than the length of the injection barrel 3.
[0021]
Next, after the cutting chips in the injection hole 54 are removed and cleaned by jet air or the like, the injection body 3 is inserted into the injection hole 54 and embedded in the structure 5 as shown in FIG. Since the outer diameter of the flange 31 of the injection plug 1 is larger than the inner diameter of the injection hole 54, the upper surface of the head 2 of the injection plug 1 is hit with a wooden hammer or a nylon hammer so that the injection plug 1 is in the injection hole 54. Type in. The head 2 is sufficiently driven into contact with the outer surface of the mortar layer 51.
[0022]
In a state where the injection plug 1 is driven into the injection hole 54, as shown in FIG. 7, the flange portion 31 bends and comes into close contact with the inner surface of the injection hole 54 to prevent the injection plug 1 from coming out. . Further, the injection hole 54 is sufficiently sealed by the plurality of flanges 31 to prevent the injection agent from flowing backward through the injection hole 54 and leaking outside. The crack reaching the outer surface of the mortar layer 51 other than the injection hole 54 is closed by a sealing material or the like.
[0023]
Next, the injector 4 is connected to the head 2 of the injection plug 1, and the injector is injected from the injector 4. As the injection pressure of the injection agent, manual pressurization or pressurization by rubber, spring, air pressure or the like can be used. In addition, the injection agent can be injected by gravity without providing any pressing means. Since the injectant is injected into the crack 53 and the exfoliation 52 from the inside of the structure 5 through the inject plug 1, the injectant is uniformly spread over the crack 53 and the exfoliation 52 without increasing the injection pressure. Can be injected. For this reason, the injection range by one injection operation is widened, and the number of injections can be reduced to improve the efficiency of the operation.
[0024]
When the injection operation is completed, the head 2 of the injection plug 1 is cut and removed. The injection barrel 3 is left as it is in the structure and is embedded. Alternatively, the entire injection plug 1 may be removed. The injection hole 54 from which the injection plug 1 has been removed or the injection hole 54 which is obtained by cutting the head 2 and exposed is filled with a mortar material or a tile joint material.
[0025]
Next, another embodiment of the injection plug will be described. FIG. 8 shows another embodiment of the injection plug 1a. Parts common to the injection plug 1 of FIG. 1 are denoted by the same reference numerals. The injection plug 1a has the same configuration of the head 2 as the injection plug 1, and the injection barrel 3 is configured to be longer than the injection plug 1. Since the length of the injection barrel 3 is long, the number of the flange portions 31 and the injection side holes 33 is also larger than that of the injection plug 1. In addition, the axial interval between the flange portions 31 is not uniform, but is wider on the tip end side of the injection body 3. The injection plug 1a can be used for repairing tiles and performing an injection operation at a deeper position. The total length of the injection plug 1a of this embodiment is about 80 mm.
[0026]
FIG. 9 is a cross-sectional view showing still another embodiment of the injection plug 1b. Parts common to the injection plug 1 of FIG. 1 are denoted by the same reference numerals. The head 2 of the injection plug 1b has an outer peripheral surface formed as a multi-stage tapered surface as shown in the figure, and is connected to the injector by the multi-stage tapered surface. The head 2 is formed of a synthetic resin. Inside the head 2, an internal space 21 is provided penetrating in the up-down direction. An injection barrel 3 is connected to a lower portion of the head 2.
[0027]
The injection barrel 3 is made of a metal material (for example, stainless steel, iron, or the like), and a thread groove is formed on the entire outer peripheral surface. The head 2 and the injection barrel 3 are screwed together by this screw groove. An injection center hole 32 is formed in the injection body 3 along the central axis. The injection center hole 32 communicates with the internal space 21 of the head 2, and also opens on the tip side of the injection barrel 3. Further, the injection barrel 3 is provided with an injection-side hole 33 in a direction orthogonal to the central axis. The injection-side holes 33 allow the injection center hole 32 to communicate with the outer peripheral side of the injection body 3, and are provided at two positions 180 degrees opposite each other on the circumference.
[0028]
As the flange 31 of the injection plug 1b, a washer made of a metal elastic body is attached. The flange 31 is fitted in a circumferential groove formed in the injection barrel 3. The flange 31 has a function of preventing the injection body 3 from coming off. This injection plug 1b can be used for repairing tiles and repairing and reinforcing cracks. In order to use the injection plug 1b for tile repair, a holding metal 6 is arranged between the head 2 and the tile as shown. The holding metal member 6 holds the surface of the tile to prevent the tile from falling off. Further, an O-ring 7 may be arranged to prevent leakage of the injectant.
[0029]
After the injection plug 1b has injected the injection agent into the structure, only the head 2 is removed from the injection trunk 3 and removed. The injection body 3 is left as it is embedded in the structure, and is used for reinforcing the structure. Since the screw groove is formed on the outer peripheral surface of the injection body 3, the bonding strength with the structure is improved. The total length of the injection plug 1b in FIG. 9 is about 100 to 300 mm. The length of the injection barrel 3 can be appropriately changed.
[0030]
Further, the head of the injection plug 1b in FIG. 9 may have the same shape as the head 2 in FIG. Further, a head having a shape as shown in FIG. 9 and a head having a shape as shown in FIG. 1 are prepared, and can be exchanged and used according to the type of injector connected to the injection plug.
[0031]
As described above, according to the injection plug of the present invention, the injection agent is injected into the crack or the like from the inside of the structure via the injection plug, so that the injection agent can be cracked without increasing the injection pressure. And the like can be injected over a wide range and uniformly. For this reason, the injection range by one injection operation is widened, and the number of injections can be reduced to improve the efficiency of the operation. Furthermore, the injection plug can be easily attached to the injection hole, and the flange-shaped portion automatically prevents the injection plug from coming off and prevents the injection agent from leaking.
[0032]
In this embodiment, the case of repairing a crack or peeling of a structure has been described as an example. However, the present invention may be applied to a wide range of other methods such as reinforcement of a structure, modification of concrete, and control of pests and the like. It can be applied to applications.
[0033]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0034]
Since the injection agent is injected into the crack or the like from the inside of the structure through the injection plug, the injection agent can be widely and uniformly injected into the crack or the like without increasing the injection pressure. For this reason, the injection range by one injection operation is widened, and the number of injections can be reduced to improve the efficiency of the operation. Further, the injection plug can be easily attached to the injection hole, and the flange-shaped portion automatically prevents the injection plug from coming off and prevents the injection agent from leaking.
[0035]
Since the internal thread of the multi-threaded screw is formed on the inner peripheral side of the head, connection between the injection plug and the injector can be easily performed. Further, the injection plug and the injector can be reliably connected with a small rotation angle.
[0036]
Since the head and the injection barrel are integrally formed of a synthetic resin material, the manufacturing cost of the injection plug can be reduced.
[0037]
Since the injection center hole opens in the direction of the tip of the injection barrel and also opens on the side orthogonal to the direction of the tip, the injection agent can be injected more widely and uniformly into cracks or the like.
[0038]
If the injection barrel is made of metal, the injection barrel can be left embedded in the structure and used to reinforce the structure.
[0039]
Since the head and the injection barrel are connected by a screw connection, the head can be easily removed from the injection barrel and removed.
[Brief description of the drawings]
FIG. 1 is a front view of an injection plug of the present invention.
FIG. 2 is a cross-sectional view of the injection plug as viewed from the front.
FIG. 3 is a view of the injection plug as viewed from above in FIG. 1;
FIG. 4 is a view of the injection plug as viewed from below in FIG. 1;
FIG. 5 is a diagram showing a procedure for injecting an injection into a structure.
FIG. 6 is a diagram showing a procedure for injecting an injection into a structure.
FIG. 7 is a diagram showing a procedure for injecting an injection into a structure.
FIG. 8 is a diagram showing a configuration of an injection plug of another embodiment.
FIG. 9 is a cross-sectional view illustrating a configuration of an injection plug according to still another embodiment.
[Explanation of symbols]
1, 1a, 1b Injection plug 2 Head 3 Injection body 4 Injector 5 Structure 6 Holder 7 O-ring 21 Internal space 22 Internal thread 31 Flange 32 Injection center hole 33 ... injection side hole 34 ... side opening 51 ... mortar layer 52 ... peeling 53 ... crack 54 ... injection hole

Claims (7)

An inner space (21) is formed, a head (2) for connecting an injector;
A rod-shaped injection body (3), which is connected to the head (2) and is inserted and arranged in an object into which an injection is to be injected;
A plurality of flanges (31) formed so as to protrude around the outer periphery of the injection barrel (3);
An injection center hole (32) that is provided so as to communicate the internal space (21) of the head (2) with the tip end side of the injection body (3) and that allows an injection agent to pass therethrough;
An injection plug having an injection side hole (33) formed so as to allow the outer peripheral side of the injection body (3) to communicate with the injection center hole (32). The injection plug according to claim 1,
An injection plug wherein the head (2) has an internal thread (22) formed on the inner peripheral side. The injection plug according to claim 2, wherein
An injection plug wherein the female screw (22) on the inner peripheral side of the head (2) is a multi-thread screw. The injection plug according to any one of claims 1 to 3,
The injection plug, wherein the head (2) and the injection barrel (3) are integrally formed of a synthetic resin material. An injection plug according to any one of claims 1 to 4, wherein
The injection plug, wherein the injection center hole (32) is open in a tip direction of the injection body (3), and is also opened on a side orthogonal to the tip direction. The injection plug according to claim 1,
An injection plug, wherein the injection body (3) is made of metal. The injection plug according to claim 6, wherein
An injection plug, wherein the head (2) and the injection barrel (3) are connected by a screw connection.

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