JP2024049418A - Elastic inner socket - Google Patents

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

This invention relates to an elastic inner socket, and since the diameter of the insert is not uniform depending on the product, or due to ribs formed in the circumferential or axial direction on the outer surface in the case of irregularly shaped inserts, a gap is formed 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 the formwork and filled with concrete; this problem is solved by placing a cap between the insert and the cap.

An insert attachment for concrete formwork that is designed to accommodate variations in the thickness of the formwork is known (Japanese Utility Model Application Publication No. 6-49604). This insert attachment H has an elastic flange 2 that protrudes in the circumferential direction on the outside of a plastic cylindrical body 1, and has a protruding strip 4 that protrudes from the outside of the body 1 in the radial direction of the body 1 along the axial direction of the body 1, and the protruding width of an elastic locking piece 3 that is provided from the protruding strip 4 in a direction perpendicular to the protruding direction of the protruding strip 4 is larger on the side of the elastic flange 2.

In addition, a PC board insert that makes it easy to remove from the formwork after the poured concrete has hardened is known (Publication 1976-143758). This PC board insert has a retainer 6 for positioning the insert 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, removal from the formwork can be easily achieved because the cap 11 is simply fitted onto the head of the retainer 6.

Japanese Utility Model Application Publication No. 6-49604 (see paragraphs 0010-0011) See published practical application No. 143758/1976, "page 3, second line from the bottom to page 4, ninth line from the top"

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 tubular portion 1a of the body 1.
Furthermore, Patent Document 2 also makes no mention of any gap that may occur between the insert body 3 and the cap 11, and appears to be based on the premise of a close fit.

(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 is formed on the circumference of the inner wall surface of the cylinder.

The cap is fitted into the opening of the insert, but if there is variation in the outer diameter of the insert, a tight fit cannot be expected. Therefore, an elastic inner socket that fits tightly into the cap is prepared, and this elastic inner socket is fitted into the cap. The aperture of the insert is pressed into this elastic inner socket, and the tip is pressed against the wall. If the outer diameter of the insert is smaller than the inner diameter of the elastic inner socket, the outer wall surface of the insert presses against the protruding part, bending it, resulting in a tight integration of the insert and cap. This integration, and the pressure contact between the insert opening end face and the wall, prevent slag from entering the insert.

(Claim 2) The cross section of the protruding portion may be semicircular.
This allows the projection to be smoothly deformed by the outer surface of the insert.

(Claim 3) The protrusions may be formed on a plurality of circumferences spaced apart from one another on the axis.
In this way, the outer surface of the insert is brought into pressure contact with the protruding portion at a plurality of points on the axis, so that the insert and the cap can be more tightly integrated with each other via the elastic inner socket.

The elastic inner socket of the present invention has a through hole on the axis of a cylinder whose one end is closed by a wall, and a protrusion is formed on the circumference of the inner wall surface of the cylinder that faces the center of the cylinder. Therefore, even if there is variation in the outer diameter of the insert and a difference in diameter occurs between the inner diameter of the cap, the protrusion bends when the two are pressed together, achieving a tight fit between them, and since the end face of the insert opening is pressed against the wall and the opening is closed, slag is prevented from entering the interior through the insert opening.

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.
1 is a left half-cut front view showing a specific example of an elastic inner socket according to the present invention. FIG. FIG. FIG. FIG. 2 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. FIG. 11 is a cross-sectional view of another embodiment of a resilient inner socket according to the present invention.

(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 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.

4 shows an example of fixing the insert 12 to a form _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 the elastic inner socket S to press the end face of the opening 14 against the wall 1.

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 FIG. 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 protrusion 5, deflecting it, and as a result, the insert 12 and the cap 11 become tightly integrated. The end face of the opening 14 of the insert 12 presses against the wall 1, and the deflection of the protrusion 5 causes it 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 the intrusion of slag into the insert 12.

The case where the object to which the insert 12 is attached is shown by 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 fitted therein is press-fitted into the aperture portion 13 of the insert 12, the protruding portion 5 is deflected to place the cap 11 over the aperture portion 13 of the insert 12, and the end face of the opening 14 is pressed against the wall portion 1.

When attaching the insert 12 to the deck plate _P2 , double-sided adhesive tape T is attached to the surface of the cap 11 facing the leg tube portion 11a, and the leg tube portion 11a is inserted into an attachment hole H drilled in the deck plate _P2 and pressed onto the deck plate _P2 by the double-sided adhesive tape T.

(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 performed.

(Claim 3) FIG. 5 shows another embodiment of the elastic inner socket S, in which the protrusions 5 are formed on circumferences R 1 and R 2 having radii R ₁ and R ₂ at a plurality of centers C ₁ and C ₂ spaced apart on the axis X.
In this case, the outer surface of the insert 12 is pressed against the protruding portion 5 at a plurality of points on the axis X, so that the insert 12 and the cap 11 can be integrated together more tightly via the elastic inner socket S.

S Elastic inner socket 1 Wall 2 Cylinder X Axis 3 Through hole 4 Inner wall surface R, _R1 , _R2 Circumference C, _C1 , _C2 Center 5 Projection 11 Cap 11a Leg tube 12 Insert 13 Opening 14 Opening _D1 Inner diameter _D2 Outer diameter _D3 Dimension K Concrete _P1 Formwork _P2 Deck plate _P3 Fitting hole T Double-sided adhesive tape

Claims (3)

An elastic inner socket (S) characterized by 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) formed on the circumference (R) of the inner wall surface (4) of the cylinder (2). The elastic inner socket (S) according to claim 1, wherein the protrusion (5) has a semicircular cross section. 3. The elastic inner socket (S) according to claim 1 or 2, wherein said projections (5) are formed on a plurality of circumferences ( _R1 , _R2 ) spaced apart on said axis (X).

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