JP3051154U - Adjustment insert - Google Patents

Abstract

(57) [Summary] [Problem] To use a pipe, it is possible to reduce the cost, but when the thread is cut, there is a disadvantage that the thickness becomes thin at the valley portion of the screw and the shaft proof strength is weakened. In addition, an external flange for increasing the pull-out strength when buried in concrete becomes an obstacle during transportation. SOLUTION: The adjusting insert according to the present invention comprises a cylindrical pipe (1), and has a thick part (3) formed at one end (2) thereof by drawing in the axial direction. The thick portion (3) has a thickness such that the root diameter (d ₁ ) of the female screw (4) cut therefrom is smaller than the inner diameter (d ₂ ) of the remaining portion (5).
Further, a non-circular extension (7) is provided on the outer surface of the other end (6). The non-circular expansion part (7) may protrude only in one plane direction including the axis of the cylindrical pipe (1), and protrude in a direction perpendicular to the one plane direction and the one plane. The projection length (L ₁ ) in the direction may be larger than the projection length (L ₂ ) in the orthogonal plane direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an adjusting insert.

[0002]

[Prior art]

 As shown in Japanese Utility Model Publication No. 1-90905, an adjusting insert using a pipe has the advantage that it can be provided at a low price because it is only necessary to process an existing pipe.

[0003]

[Problems to be solved by the invention]

 However, cutting a pipe into a pipe has the disadvantage that the thickness at the root of the thread is reduced and the axial strength is reduced. In the case of inserts, a flange is formed on the outer surface of the insert to increase the pull-out strength when buried in concrete, but this flange becomes an obstacle during transportation. The purpose of the present invention is to provide an adjusting insert that can solve these problems.

[0004]

[Means for Solving the Problems]

 The adjusting insert according to the present invention comprises a cylindrical pipe. One end of the pipe is provided with a thick portion formed by drawing in the axial direction. This thick portion has a thickness such that the root diameter of the female screw cut on the inner surface is smaller than the inner diameter of the remaining portion. A non-circular extension is provided on the outer surface of the other end of the cylindrical pipe.

[0005] The cylindrical pipe used here may be a commercially available one. This pipe is cut into the appropriate length required as an insert, and one end of the pipe is squeezed in the axial direction from the outside in the radial direction. The outer diameter of the pipe is reduced, but the wall thickness expands in the axial direction in search of a relief. Therefore, the thickness of that portion increases, and the female screw is cut on the inner peripheral surface of this thick portion. Since the thick portion has a thickness such that the root diameter of the female screw is smaller than the inner diameter of the remaining portion, when the female screw is cut from one end of the cylindrical pipe, the thick portion ends. This female screw ends at the place. For this reason, the female screw processing only needs to be performed at a portion corresponding to the axial length of the thick portion.

The term “non-circular” means that the outer periphery is not circular when viewed in a plan view, and has an effect of preventing corotation when screwing a bolt. This extension is constructed by expanding the opening of the cylindrical pipe from inside to outside.

[0007] The non-circular extension may protrude only in one plane including the axis of the cylindrical pipe. In this case, the width at the tip of the extension is the same as the outer diameter of the cylindrical pipe, so that even if inserts are stacked, the extensions do not repel each other, which is convenient for transportation and storage.

[0008] The non-circular expansion portion protrudes in a direction perpendicular to the one plane direction including the axis of the cylindrical pipe and the one plane, and the protruding length in the one plane direction is equal to the projection length in the perpendicular plane direction. It may be larger than the length. In this case, the protruding lengths in the orthogonal plane direction also contribute to the pull-out resistance to some extent.

When a cylindrical pipe is expanded outward on a plane including the axis thereof so as to form an expanded portion having a width substantially equal to the outer diameter of the pipe, a pipe end on a plane orthogonal to this plane is inevitable. An extended part that slightly deforms and protrudes outward appears. Therefore, no special steps are required to form this smaller extension.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a cylindrical pipe. The cylindrical pipe 1 has a thick portion 3 formed at one end 2 thereof by drawing in the axial direction. The thick portion 3 has a thickness such that the root diameter d ₁ of the female screw 4 cut on the inner surface thereof is smaller than the inner diameter d ₂ of the remaining portion 5. The cylindrical pipe 1 has a non-circular expansion section 7 on the outer surface of the other end 6 thereof.

The cylindrical pipe 1 used here may be a commercially available one. This cylindrical pipe 1 is cut into an appropriate length required as an insert, and one end 2 thereof is squeezed in the axial direction from the outside in the radial direction. Although the outer diameter of the cylindrical pipe 1 is reduced, its thickness expands in the axial direction in search of a relief area. Therefore, the thickness of that portion increases to become the thick portion 3, and the female screw 4 is cut into the inner peripheral surface of the thick portion 3.

The thick portion 3 has a thickness such that the root diameter d ₁ of the female screw 4 is smaller than the inner diameter d ₂ of the remaining portion 5. Then, when the thick portion 3 ends, the female screw 4 also ends. Therefore, the processing of the female screw 4 only needs to be performed at a portion corresponding to the axial length of the thick portion 3.

The non-circular shape means that the outer shape is not circular when viewed in a plane, and has an effect of preventing co-rotation when screwing the bolt. The expansion portion 7 is formed by expanding the opening of the other end 6 of the cylindrical pipe 1 from the inside to the outside.

The insert is usually buried in a concrete product 21, for example, a U-shaped groove, as shown in FIG. 3, and an object 22 attached to one surface of the concrete product 21, for example, in the case of a U-shaped groove, When attaching the lid to cover the object 22 with the bolt 23, the level of the object 22 is adjusted by adjusting the screwing depth of the bolt 23 to the insert. By making the upper washer 24 with a normal stupid hole and using the stepped nut 25 for the lower washer, the object 22 can be moved up and down.

Since the female screw 4 of this insert is only provided at one end 2 of the cylindrical pipe 1, the labor for cutting is reduced. Further, even in the case of a thin cylindrical pipe, the female screw 4 is cut in the thick part by narrowing, so that the resisting force against the axial load in the female screw part is large. In addition, the presence of the extension 7 provides a great resistance to the force of the insert trying to rotate around its axis.

The non-circular expansion portion 7 protrudes only in one plane including the axis of the cylindrical pipe 1. In this case, since the width w at the distal end of the expansion portion 7 is the same as the outer diameter D of the cylindrical pipe 1, the expansion portions 7 do not repel each other even when the inserts are stacked, which is convenient for transportation and storage. .

The non-circular expansion portion 7 protrudes in a plane direction including the axis of the cylindrical pipe 1 and in a direction perpendicular to the plane, and a protruding length L ₁ in the plane direction is changed in the orthogonal plane direction. It has become larger than the projection length L _2. In this case, the protruding lengths in the orthogonal plane direction also contribute to the pull-out strength to some extent. In the case of overlapping, if the protruding length portions in the orthogonal plane direction are opposed to each other, they do not repel each other much. The extension with the smaller protruding length is formed simultaneously with the molding of the larger extension.

In the drawings, reference numeral 26 denotes a cap for preventing intrusion.

[0019]

[Effect of the invention]

 According to the present invention, since a commercially available cylindrical pipe is used, it can be provided at a low cost, and a female screw is cut into a thick part by narrowing down, so that the axial strength at the female screw part can be increased and the female screw processing can be performed at this thick part. The machining cost can be reduced by restricting the insert to the maximum, and the rotational force received by the insert can be countered by the expansion.

According to the second aspect, the width of the distal end portion of the expansion portion is the same as the outer diameter of the cylindrical pipe. Therefore, even if the inserts are stacked, the expansion portions do not repel each other, which is convenient for transportation and storage. Be combined.

According to the third aspect, the protruding portions in the orthogonal plane direction can also contribute to the pull-out resistance to some extent. You do not have to reject each other.

[Brief description of the drawings]

FIG. 1 is a front view showing a specific example of an adjusting insert according to the present invention.

FIG. 2 is a bottom view.

FIG. 3 is a sectional view taken along the line 3-3 in FIG. 1, showing a state of use;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical pipe 2 One end 3 Thick part 4 Female screw 5 Remaining part 6 Other end 7 Expansion part

Claims (3)

[Utility model registration claims] 1. One end of a cylindrical pipe (1)
(2) is provided with a thick part (3) formed by drawing in the axial direction, and the thick part (3)
(4) has a thickness such that the valley diameter (d ₁ ) is smaller than the inner diameter (d ₂ ) of the remaining portion (5), and the outer surface of the other end (6) has a non-circular expanded portion (7 An insert for adjustment characterized by comprising (1). 2. The non-circular extension (7) includes a cylindrical pipe (1).
2. The adjusting insert according to claim 1, wherein the adjusting insert protrudes only in one plane direction including the axis. 3. The non-circular extension (7) includes a cylindrical pipe (1).
Project in a plane direction including the axis of the plane and a plane perpendicular to the plane, and the protrusion length in the plane direction (L ₁ ) is larger than the protrusion length in the perpendicular plane direction (L ₂ ). The adjusting insert according to claim 1, wherein