JP2009013735A - Latch plug body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch plug body which facilitates a piston body to be attached easily to a plug body while it can easily be taken out from the piston body from the plug body after use, so that cleaning of the latch plug body, especially cleaning inside of a through hole and the piston body can easily be done and furthermore can repeatedly be used. <P>SOLUTION: The latch plug body is fitted to an opening part of a communicating tube or a communicating hole which communicates with a mortar exhaust port of a mortar filling reinforcing bar joint embedded within a reinforced concrete and whose one end is opening toward the outside. The latch plug body is composed of a hard plug body with resiliency provided with a through hole, a shaft body idly inserted into and moving freely within the through hole and a piston body with a pressurizing plate at one end and a release-stop end at the other end respectively provided at the position projected from the plug of the shaft body. The release-stop end in the direction perpendicular to the shaft body has its maximum horizontal width including the shaft body the same or a little larger than an internal diameter of the through hole. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a connecting pipe attached to a mortar discharge port of a mortar filling type reinforcing bar joint, or a stopper fitted to an opening portion of a communication hole communicating with the mortar discharge port.

    A mortar filling type reinforced joint (hereinafter referred to as a mortar joint) is embedded in reinforced concrete, and is used for joining a reinforcing bar in the reinforced concrete and a joining counterpart.

    The mortar joint is a rebar joint widely disclosed and used in Japanese Patent Publication No. 5-61422, etc., and is composed of an elongated cylindrical body having both ends open, and a pair of reinforcing bars are inserted into the tubular body from opposite directions. In addition, a reinforcing bar joint is formed by injecting and filling mortar (filler including an epoxy resin or the like) or the like and fixing the reinforcing bar in the cylindrical body by hardening, thereby forming a pair of reinforcing bars.

    An embodiment in which the mortar joint is used by being embedded in reinforced concrete will be described with reference to FIG. Insert the end of each of the multiple main rebars (two in the figure) B arranged in reinforced concrete A from the opening of the mortar joint C so that the end of the end of the main rebar B reaches almost the center. The mortar joint C is buried. On the side wall of the mortar joint C, a mortar inlet D is provided in the vicinity of one side opening, and a mortar outlet E is provided in the vicinity of the other side opening, and a communication pipe or a communication hole F is formed in each of these. Yes.

    The end of the main reinforcing bar protrudes outward from the end face of the other reinforced concrete to which the reinforced concrete A is joined, and the exposed end passes through the opening of the mortar joint C embedded in the joint. insert. After that, a filler such as mortar is attached from the opening of the communication pipe that is attached to the mortar inlet D and opens outward, or the communication hole F that communicates with the mortar inlet D and opens outward. Pump in. Mortar or the like fills the inside of the mortar joint C and overflows from the communication pipe or the opening of the communication hole F formed in the mortar discharge port E. The mortar injection is repeated for each mortar joint.

    As another mortar injection method, there is a so-called single injection method disclosed in Japanese Patent Laid-Open No. 3-144041. In this injection method, a mortar inlet of one joint among a plurality of buried joints is installed by placing a formwork on the periphery of the other member prior to erection of one member and erection of one member. In this injection method, the mortar is pumped from the inside, and the joint space surrounded by the mold between the two members and remaining in the gap and the interior of the plurality of buried joints are filled by a single injection.

    In any of the above injection means, when the mortar injection is finished, a rubber stopper is fitted to the communication pipe of the mortar discharge port E or the opening of the communication hole F to prevent leakage of the mortar, and the fluidity of the mortar is lost. Then, the rubber stopper is removed. The first mortar that emerges from the opening is a muddy liquid rich in cement paste. Some separation occurs in the mortar being injected, and the cement paste, which is a light component, tends to collect at the injection tip. By using this stopper body, such a muddy liquid is discharged with excess water and becomes a healthy grout, and it is not necessary to discharge the muddy liquid.

    As described above, it is necessary to continue the injection until the muddy liquid that comes out first at the time of mortar injection is removed. At this time, the opening of the communication pipe or the communication hole F is flush with the outer wall surface. The muddy liquid drips along the outer wall surface and contaminates the outer wall surface. Therefore, it is necessary to perform a cleaning operation called keren hanging after the injection. However, this operation is time-consuming and troublesome for workers. In addition, after removing the muddy liquid cured product adhering to the outer wall surface by applying keren, there is also a problem that a discolored region infiltrated with the liquid remains and the appearance of the outer wall surface is impaired. Further, in the case of the one-time injection method, it takes time to confirm that a large number of buried joints are filled with mortar.

Therefore, as shown in Japanese Patent Application Laid-Open No. 9-209506, the applicant is the stopper body G of FIG. 7 fitted in the opening of the communication pipe or the communication hole. (A) The plug H passes through the inner end surface, which is the end surface on the side inserted into the communication pipe or the communication hole, and the outer end surface, which is the opposite end surface, along the plug body axis. (B) The piston body J includes a shaft body K, a pressure receiving plate L attached to one end thereof, and a retaining plate M attached to the other end thereof. The shaft body K of the piston body J is loosely inserted into the body through-hole I, and the pressure receiving plate L is disposed outside the inner end surface of the plug body, and the retaining plate M is disposed outside the outer end surface of the plug body. We have developed a stopper body characterized by the combination.
JP-A-9-209506

    However, the stopper G is for the purpose of preventing the muddy liquid from flowing out as described above. However, since the retaining plate M is formed large, the stopper body G enters the through hole I of the piston body. As shown in FIG. 7, the stopper body G after use is difficult to mount, and the muddy liquid filled in the through-hole I formed along the axis of the stopper body H is the piston body. It is solidified including the shaft body K of J. In order to use the stopper body G again, it is necessary to remove the solidified state, but both ends of the shaft body K have pressure receiving plates having a diameter larger than the diameter of the through hole I. L and retaining plate M are respectively formed, and the work of destroying solidification and removing the mortar in the through hole and the work of removing the mortar solidified adhering to the inner wall of the through hole and the piston body thereafter It was difficult and it was difficult and uneconomic to repeatedly use the stopper G.

    The present invention solves the above-mentioned drawbacks, makes it easy to attach the piston body to the plug body, and is easy to remove the piston body after use, and cleaning the stopper body, particularly in the through-holes and the piston body. Therefore, it is possible to provide a stopper body that can be smoothly used and can be repeatedly used by attaching a piston body to the stopper body thereafter.

    In order to solve the above-mentioned problems, the present invention communicates with a mortar discharge port of a mortar-filled type reinforced joint embedded in reinforced concrete, and one end of the communication pipe is open to the outside. A stopper body to be fitted, which has a resilient hard plug body provided with a through hole, a shaft body movably inserted into the through hole, and a shaft body projecting from the shaft body A piston body comprising a pressure receiving body at one end and a retaining end at the other end provided at a position, the retaining end being the maximum lateral width including the shaft in a direction perpendicular to the shaft Is characterized in that the stopper is formed to be the same as or slightly larger than the inner diameter of the through hole.

  Further, the retaining end portion is characterized by a stopper body having a bent shape in which the end portion of the shaft body is bent stepwise.

    Further, the stopper end is characterized by a stopper body having a flat bulging shape.

    Further, the stopper end is characterized by a stopper body having a knot shape formed by bending and connecting shafts.

    Further, the retaining end portion is characterized by a stopper body having a shape in which a shaft body is branched to form a branch shaft body, and the branch shaft body has an elastic shape that bulges outward.

    Further, the pressure receiving body is characterized by a stopper body formed to be detachable from the shaft body.

    Further, the present invention is characterized in that the stopper body is formed by forming a shaft body portion close to the connecting portion with the pressure receiving body as a thin-walled portion.

    The stopper body of the present invention has the maximum lateral width of the retaining end portion of the piston body equal to or slightly larger than the inner diameter of the through-hole, so that the stopper body is slightly deformed or left as it is. The retaining end can be passed through the through-hole by pulling a string or the like on the retaining end and pulling from one end to the other end of the through-hole, thereby removing the piston body from the stopper and Mounting becomes easy, and it is possible to simplify the completion of the stopper body that is in use.

    Also, when carrying the stopper body, the stopper end is small and easy to carry, and the entire stopper body is not subjected to a load that causes a change in the through hole. Since it is in close contact with the opening, the through hole is not deformed, and the piston body does not come out of the through hole.

    Further, after use, it is possible to rotate the shaft body or move it in the axial direction while grasping the retaining end and confirming the state of the mortar in the through hole. The mortar solidified with mud liquid can be destroyed and removed by fixing the stopper and shaft, and if the mortar in the through hole is removed, the piston body is pulled from the pressure-receiving body side. By this, it is possible to pass the end portion of the through hole through the through hole, and the piston body can be extracted from the plug body. By removing the plug body, the stopper body and the piston body can be cleaned more completely, and then the stopper body can be repeatedly used by reinserting the piston body into the through hole by the same method as described above.

    In addition, by making the pressure receiving body detachable from the shaft body, manufacturing at the time of molding is facilitated, and in use, the pressure body is inserted into the end of the shaft body after the shaft body is inserted into the through hole of the plug body. The plug body and the piston body can be easily cleaned by removing the pressure receiving body from the shaft body even after use, and repeated use is possible without any trouble.

    Hereinafter, an example of an embodiment of a stopper body according to the present invention will be described with reference to the drawings.

    FIG. 1 shows a plan sectional view, a side sectional view, and a front view of a stopper body 1 according to an embodiment of the present invention. The stopper body 1 is used for a communication pipe or an opening portion of a communication hole formed in communication with the discharge port of the known mortar joint. The stopper body 1 includes the stopper body 2 and the shaft body 3. The piston body 6 includes a pressure receiving body 4 and a retaining end 5.

    The plug body 2 is a member made of a material such as rubber or flexible hard synthetic resin having a truncated cone shape in cross section. The inner end face on the pressure receiving body 4 side is a small diameter end face 7 and the outer end face is a large diameter. The end face 8 is formed so as to be easily fitted into the opening of the communication pipe or the communication hole.

    A through hole 9 is formed in the central portion of the plug body 2 in the longitudinal direction so as to penetrate between both end faces 7 and 8 of the plug body 2.

    The shaft body 3 of the piston body 6 is a long rod-shaped member made of rubber, synthetic resin, or other material, and the material is not particularly limited like the plug body 2. The shaft body 3 is loosely inserted into the through hole 9 of the plug body 2. A pressure receiving body 4 is formed at one end of the shaft body 3, and the outer surface thereof is shaped to receive a mortar pressure that is pushed out from the discharge port to the communication pipe or the communication hole. The piston body 6 is movable.

    A retaining end 5 is formed at the other end of the shaft 3. In this embodiment, the retaining end 5 has a bent shape formed by bending the shaft 3 in a step shape. Yes. As a bent shape, in the direction orthogonal to the shaft body, the lateral width H from one side edge of the shaft body 3 to the other side edge of the shaft body 3 is substantially the same as or slightly larger than the hole diameter W of the through hole 9 of the plug body 2. It is said. By making the lateral width H formed by the bent shape substantially the same as or slightly larger than the through-hole diameter W, it is possible to slightly increase the hole diameter W on the side perpendicular to the side wall by pressing the opposite side wall side of the plug body 2. Thus, the retaining end can be inserted and passed by pulling a string or the like from the bent retaining end 5 side to the through-hole 9, and the shaft body 3 of the piston body 6 is plugged. In the through hole 9 of the body 2, it becomes possible to be integrated in a loosely inserted state.

    On the other hand, friction is generated on the inner wall of the through hole 9 over its entire circumference, and the shaft body 3 that is loosely inserted when being transported or unused is often inclined in the through hole 9. The piston body inserted at one end thereof does not come out of the through-hole 9 unless a special load is applied such as a pulling force is applied.

    On the other hand, after use of the stopper body 1, as shown in FIG. 2, the pressure receiving body 4 is pushed out to the small diameter end face 7 side of the stopper body 2 and pushed into the through hole 9 and solidified mortar. The plug body 2, the shaft body 3, and the pressure receiving body 4 are fixed by the mortar.

    In order to reuse the stopper body 1 in a solid state after use, the mortar in the through hole 9 is removed, and the shaft body 3 of the piston body 6 is in a loose insertion state in the through hole 9. However, since the retaining end 5 is sized so that it can be easily gripped, the shaft 3 is moved back and forth while grasping the retaining end 5 and viewing the through hole 9. It is possible to cause cracking or breakage in the solidified mortar by performing left and right or rotation, etc., release the fixed state of the plug body 2, the shaft body 3 and the pressure receiving body 4 by the mortar, and remove the mortar in the through hole 9. it can.

    Further, the stopper body 5 can be removed from the through hole 9 by deforming the stopper body 2 to separate the stopper body 2 and the piston body 6. The attached mortar and the mortar attached to the shaft body 3 can be completely cleaned and removed, and can be reused by attaching the piston body 6 to the plug body 2 again.

    Fig.3 (a) has shown the other Example of the stopper body 1a of this invention. The stopper body 1a comprises a stopper body 2a and a piston body 6a comprising a shaft body 3a, a pressure receiving body 4a, and a retaining end portion 5a.

  The retaining end 5a is configured as a flat bulging body in which the end of the shaft body 3a is enlarged. As a retaining end made of a bulging body, a triangular retaining end 5b having a triangular shape is formed at the end of the shaft body 3b shown in FIG. 3 (b), as shown in FIG. 3 (c). By adopting a shaft body 3d having the flexibility shown in FIG. 3 (d), the bulging body projecting from one of the end portions of the shaft body 3c and projecting from the bulging body to form a retaining end portion 5c. The end portion of the shaft body 3c shown in FIGS. 3 (e) and 3 (f) is branched to form a branch shaft body 5e. Each of the branch shafts 5e has an elastic shape that bulges outward, and the branch shaft 5e shown in (e) has a shape that bulges in a curved shape, and the branch shown in (f). The shaft 5f has a shape that bulges in a bent shape, and various shapes can be considered.

  In any of the above-described retaining ends 5a to 5d, the maximum lateral width orthogonal to the shaft body is the same as or slightly larger than the diameter of the through hole 9 'of the plug body 2a.

    FIG. 4 shows the relationship between the shaft body and the pressure receiving body. The shaft body 3 is formed by integrally molding or bonding a separate body, or by bonding or fusion bonding, as shown in FIG. A concave and convex portion 10 is formed at the end of the ′, and the pressure receiving body 4 ′ is detachably fitted to the concave and convex portion 10, as shown in FIG. 4B, the folded portion at the end of the shaft body 3 ″ And the like, and a pressure receiving body 4 ″ is fitted to the bulge 11. With the above configuration, the piston body can be easily attached to and detached from the plug body, and the removal of the solidified mortar and the subsequent cleaning are also simplified.

    FIG. 5 is another embodiment showing the relationship between the shaft body 13 and the pressure receiving body 14, and the shaft body 13 side portion close to the connecting portion with the pressure receiving body 14 as means for extracting the piston body from the through hole of the plug body. The thin-walled portion 15 is used, and the retaining end portion side is pulled after use to cut the thin-walled portion 15 so that the pressure receiving body 14 remains on the surface side of the concrete. When reusing, the pressure-receiving body 14 can be adhered and used, but only the piston body can be repeatedly used as a new one.

The cross-sectional view which shows one Example of the stopper body of this invention. The sectional side view which shows one Example of the stopper body of this invention. The front view which shows one Example of the stopper body of this invention. The cross-sectional view after use of the stopper body of the present invention. The plane sectional view of other examples of the stopper body of the present invention. The top view which shows the other Example of the retaining edge part of the stopper body of this invention. The top view which shows the other Example of the retaining edge part of the stopper body of this invention. The top view which shows the other Example of the retaining edge part of the stopper body of this invention. The top view which shows the other Example of the retaining edge part of the stopper body of this invention. The top view which shows the other Example of the retaining edge part of the stopper body of this invention. The cross-sectional view which shows one Example of the shaft body edge part and pressure receiving body of the stopper body of this invention. The cross-sectional view which shows the shaft body edge part of the stopper body of this invention, and the other Example of a pressure receiving body. The cross-sectional view which shows one Example of the shaft body edge part and pressure receiving body of the stopper body of this invention. Sectional drawing which shows the usage condition of a mortar joint. Sectional drawing which shows the state after use of the conventional stopper body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stopper body 2 Plug body 3,13 Shaft body 4,14 Pressure receiving body 5 Retaining end part 6 Piston body 7 Small-diameter end surface 8 Large-diameter end surface 9, 9 'Through-hole 10 Uneven part 11 Swelling part 15 Thin-walled part

Claims (7)

    A mortar filling type reinforced mortar joint embedded in reinforced concrete that communicates with a mortar outlet, and a stopper that is fitted to the opening of a communication pipe or a communication hole whose one end is open to the outside, An elastic hard plug body provided with a through-hole, a shaft body movably inserted into the through-hole, and a pressure receiving body at one end provided at a position protruding from the plug body of the shaft body, It is composed of a piston body composed of a retaining end portion at the other end, and the retaining end portion has the same or slightly larger maximum lateral width including the shaft body in the direction orthogonal to the shaft body. A stopper body formed by forming a stopper body.     The stopper member according to claim 1, wherein the retaining end portion has a bent shape in which the end portion of the shaft body is bent stepwise.     The stopper member according to claim 1, wherein the stopper end portion has a flat bulging shape.     The stopper member according to claim 1, wherein the retaining end portion has a knot shape formed by bending and connecting shafts.     The stopper member according to claim 1, wherein the retaining end portion branches from the shaft body to form a branch shaft body, and the branch shaft body has an elastic shape that bulges outward. .     6. The stopper body according to claim 1, wherein the pressure receiving body is formed to be detachable from the shaft body.     The stopper member according to any one of claims 1 to 6, wherein the shaft body portion adjacent to the connecting portion with the pressure receiving body is formed as a thin-walled portion.

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