Elastic inner socket

Abstract

To provide an elastic inner socket capable of accommodating with non-uniformity in the thickness of a waste mold and a gap that may occur between an insert body 3 and a cap 11, and close fitting between an insert hardware G and a cylindrical part 1a of a body 1.SOLUTION: An elastic inner socket (S) according to the present invention is a cylinder (2) with one end closed by a wall part (1), in which a through hole (3) is bored in the wall part on an axis line (X) of the cylinder, and a protrusion (5) facing toward a center (C) of the cylinder is formed on a circumference (R) of an inner wall surface (4) of the cylinder. When an insert (12) and a cap (11) are fitted together, an end surface of an opening (14) of the insert comes into pressure contact with the wall part of the elastic inner socket, and the protrusion is bent on an outer surface of the insert, so that the two fit closely together. Attaching the insert to a mold with a double-sided adhesive tape (T) will prevent mortar of a filled concrete from entering through the opening.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to an elastic inner socket, and since the diameter of the insert is not uniform depending on the product, or in the case of irregularly shaped inserts, due to ribs formed circumferentially or axially on the outer surface, a gap is created between the cap that covers the opening of the insert, making it difficult to reliably prevent mortar from entering the insert when the insert is attached to a formwork and filled with concrete.This problem is solved by interposing a cap between the insert and the cap. [Background technology]

[0002] An insert fixture for concrete formwork that can accommodate variations in the thickness of the formwork is known (Japanese Utility Model Application Laid-Open Publication No. 6-49604). This insert fixture H has an elastic flange 2 that protrudes circumferentially from the outside of a plastic cylindrical shell 1, and has a ridge 4 that protrudes radially from the outside of the shell 1 along the axial direction of the shell 1. The ridge 4 is provided perpendicular to the protruding direction of the ridge 4 and has a protruding width that is larger on the elastic flange 2 side.

[0003] Also known is an insert for PC boards that makes it easy to remove the formwork after the poured concrete has hardened (Publication No. 143758 / 1976). This PC board insert has a retainer 6 for positioning the insert that is screwed from the inside into a screw hole drilled in a predetermined position in a metal formwork 5, and a cap 11 is fitted onto the head 7 of the retainer 6 to set the insert body 3. After the poured concrete has hardened, the insert can be easily removed because only the cap 11 is fitted onto the head of the retainer 6. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 6-49604 (see paragraphs 0010-0011) [Patent Document 2] Publicly-available practical application No. 143758, Showa 51 (1976-143758) "See page 3, second line from the bottom to page 4, ninth line from the top" Summary of the Invention [Problem to be solved by the invention]

[0005] The technique disclosed in Patent Document 1 can accommodate variations in the thickness of the formwork, but does not take into consideration the fit between the insert metal G and the cylindrical portion 1a of the body 1. Furthermore, Patent Document 2 also makes no mention of gaps that may occur between the insert body 3 and the cap 11, and appears to be premised on a tight fit. [Means for solving the problem]

[0006] (Claim 1) The elastic inner socket of the present invention is a cylinder with one end closed by a wall, a through hole drilled in the wall along the axis of the cylinder, and a protrusion facing the center of the cylinder formed on the circumference of the inner wall surface of the cylinder.

[0007] The cap is fitted into the opening of the insert, but if the insert's outer diameter varies, a tight fit cannot be expected. Therefore, an elastic inner socket that fits tightly to the cap is prepared and fitted into the cap. The insert's opening is press-fit into the elastic inner socket, and the tip is pressed against the wall. If the insert's outer diameter is smaller than the inner diameter of the elastic inner socket, the outer wall surface of the insert presses against the protruding portion, causing it to bend, resulting in a tight integration between the insert and the cap. This integration, along with the pressure contact between the insert's opening end face and the wall, prevents slag from entering the insert.

[0008] (Claim 2) The protrusion may have a semicircular cross section. This allows the protrusion to be smoothly deformed by the outer surface of the insert.

[0009] (Claim 3) The protrusions may be formed on a plurality of circumferences spaced apart on the axis. In this way, the outer surface of the insert is brought into pressure contact with the protrusion at a plurality of points on the axis, so that the insert and the cap can be more tightly integrated via the elastic inner socket. [Effects of the Invention]

[0010] According to the elastic inner socket of the present invention, a through hole is provided in the wall on the axis of a cylinder whose one end is closed by the wall, and a protrusion facing the center of the cylinder is formed on the circumference of the inner wall surface of the cylinder.Therefore, even if there is variation in the outer diameter of the insert and a difference in diameter occurs between it and the inner diameter of the cap, the protrusion will flex when the two are pressed together, allowing the two to fit tightly together.Furthermore, since the open end face of the insert is pressed against the wall and the opening is closed, slag can be prevented from entering the interior through the opening of the insert. [Brief explanation of the drawings]

[0011] The drawings show an embodiment of the elastic inner socket according to the present invention, and the same reference numerals in the drawings indicate the same or corresponding parts. [Figure 1] 1 is a left half-cut front view showing a specific example of an elastic inner socket according to the present invention. FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 1 is a left half-cut front view showing an example of a state in which the elastic inner socket according to the present invention is used, without cutting away the upper end portion of the insert. [Figure 5] 10 is a cross-sectional view of another embodiment of a resilient inner socket according to the present invention. FIG. [Example]

[0012] (Claim 1) In Figures 1 to 3, the elastic inner socket S of the present invention is a cylinder 2 with one end closed by a wall portion 1, a through hole 3 is drilled in this wall portion 1 on the axis X of the cylinder 2, and a protrusion 5 facing the center C of the cylinder 2 is formed on the circumference R of the inner wall surface 4 of the cylinder 2.

[0013] 4 shows an example of fixing an insert 12 to a formwork P1. A plastic cap 11 is fitted into the aperture 13 of the insert 12, but if there is variation in the outer diameter D2 of the aperture 13, a tight fit cannot be expected. Therefore, an elastic inner socket S that fits tightly into the cap 11 is fitted into the cap 11, and the aperture 13 of the insert 12 is inserted into this elastic inner socket S, so that the end face of the opening 14 is pressed against the wall 1.

[0014] When the outer diameter D2 of the aperture portion 13 of the insert 12 is smaller than the inner diameter D1 of the elastic inner socket S and is larger than the dimension D3 (see Figure 2) between the opposing protrusions 5 on the diameter of the elastic inner socket S, the outer wall surface of the insert 12 presses against the protrusions 5, causing them to bend, resulting in the insert 12 and cap 11 becoming tightly integrated. The end face of the opening 14 of the insert 12 presses against the wall portion 1, and the bending of the protrusions 5 causes the insert 12 to become tightly integrated with the elastic inner socket S. Therefore, when the plastic cap 11 is attached to the formwork P1 with double-sided adhesive tape T and concrete K is poured, the opening 14 is sealed by the formwork P1, preventing slag from entering the insert 12.

[0015] Note that the object to which the insert 12 is attached is shown in imaginary lines as being the deck plate P2. In this case, the cap 11 has a leg tube portion 11a that fits into a mounting hole H drilled in the deck plate P2. The cap 11 with the elastic inner socket S inserted is press-fitted into the bore portion 13 of the insert 12, the protrusion 5 is deflected to fit the cap 11 over the bore portion 13 of the insert 12, and the end face of the opening 14 is pressed against the wall portion 1.

[0016] When attaching the insert 12 to the deck plate P2, double-sided adhesive tape T is attached to the surface of the leg tube portion 11a of the cap 11, and this leg tube portion 11a is inserted into the mounting hole H drilled in the deck plate P2 and pressed onto the deck plate P2 with the double-sided adhesive tape T.

[0017] (Claim 2) As can be seen from FIG. 1, the cross section of the protruding portion 5 is formed in a semicircular shape. In this case, the deformation of the protrusion 5 by the outer surface of the insert 12 is smoothly carried out.

[0018] (Claim 3) Figure 5 shows another form of elastic inner socket S, in which protrusions 5 are formed on circumferences R1 and R2 with radii at centers C1 and C2 spaced apart on axis X. In this case, the outer surface of the insert 12 is pressed against the protrusion 5 at a plurality of points on the axis X, so that the insert 12 and the cap 11 can be more tightly integrated via the elastic inner socket S. [Explanation of symbols]

[0019] S Elastic inner socket 1 wall 2 cylinders X axis 3 Through holes 4 Inner wall surface R, R1, R2 circumference C, C1, C2 center 5 Protrusion 11 Cap 11a Leg tube part 12 Inserts 13 Caliber 14 Aperture D1 inner diameter D2 outer diameter D3 dimensions K Concrete P1 formwork P2 Deck Plate P3 fitting hole T double-sided adhesive tape

Claims

1. An elastic inner socket (S) characterized in that it is a cylinder (2) with one end closed by a wall portion (1), a through hole (3) drilled in the wall portion (1) on the axis line (X) of the cylinder (2), and a protrusion (5) facing the center (C) of the cylinder (2) is formed on the circumference (R) of the inner wall surface (4) of the cylinder (2).

2. 2. The elastic inner socket (S) according to claim 1, wherein the protrusion (5) has a semicircular cross section.

3. The protrusions (5) are spaced apart on the axis (X) by a plurality of circumferences (R 1 , R 2 3. The elastic inner socket (S) according to claim 1 or 2, which is formed on a

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