JPH0632495Y2 - Sheet metal female thread member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a female screw member for a thin sheet metal formed in a direction parallel to the plane of the thin sheet metal.

[Prior Art] Conventionally, as an internal thread member of a thin metal plate, there is a thin metal plate in which an internal thread is formed. The female screw formed on this sheet metal has a screw hole formed in a direction perpendicular to the plane of the sheet metal. In this case, the thickness of the sheet metal forming the female screw is thin,
When the number of screw pitches is insufficient, burring processing as shown in FIG. 5 (a) is applied to the thin sheet metal 11 to make up for the insufficient thickness of the sheet metal, and the protruding portion 11a is provided to process the female thread 12. Was there.

On the other hand, when forming a female screw in a direction parallel to the plane of the thin sheet metal, as shown in FIGS. A bent portion 13 bent at a right angle is provided partially or wholly, and a screw hole is formed in the plane of the bent portion 13 to form a female screw member. When the bent portion 13 has a rectangular shape, it is necessary to set the length of each side in forming the female screw to be twice the screw nominal diameter or more.

A female screw 12 formed parallel to the plane of the sheet metal 11
When provided in a case 14 formed of a thin sheet metal 11 as shown in FIG. 6, a plurality of bent portions 13 bent at right angles are formed at the opening edge of the case 14, and a female screw 12 is formed on the plane of the bent portion 13. Was processed into a female screw member.

[Problems to be Solved] As described above, in the conventional thin sheet metal having the female screw in the direction parallel to the plane of the thin sheet metal, the female screw member is in a state of protruding to the opening surface of the case. For this reason, there is a problem that the female screw member becomes an obstacle to the mounting parts and the like housed inside the case and reduces the volume of the mounting parts and the like with respect to the internal holding volume.

In addition, when the female screw member is formed in a narrow place, the above-mentioned bent portion may be difficult to be provided or may not be provided, which makes it difficult to form the female screw member.

The present invention has been made in consideration of the above-mentioned problems,
When formed in a case, etc., most of the internal holding volume can be used for mounting parts, etc., the reduction of the volume of mounting parts, etc. can be minimized, and the female screw member can be formed even in a narrow place. An object of the present invention is to provide an internal thread member of a thin sheet metal that can be manufactured.

[Means for Solving the Problems] A female screw member of a thin metal plate of the present invention for achieving the above object is a rectangular squeezing portion formed by cutting and raising a thin metal plate and having an inner wall circumscribing the inner diameter of the female screw. On a part of the inner wall of the rectangular squeezing portion, a flat plate is provided with a first screw portion formed corresponding to the nominal diameter of the female screw, and the thin sheet metal positioned on both side edges of the opening of the rectangular squeezing portion. And a second screw portion formed corresponding to the nominal diameter of the female screw on the flat sheet metal, and the thin sheet metal of the first screw portion and the second screw portion. The structure is such that a female screw is integrally formed in parallel with the plane.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 (a), (b), and (c) show the female screw member of the thin sheet metal in the present embodiment. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. (C) is a right side view, FIG. 2 is an enlarged perspective view, and FIG. 3 is an enlarged sectional view.

In these drawings, 1 is a sheet metal. Reference numeral 2 is a rectangular squeezing portion cut and raised in a V shape, and is an end portion 1a of the sheet metal 1.
It is provided in the vicinity of. The triangular inner wall of the square cut portion 2 is provided so as to circumscribe the inner diameter D1 of the female screw to be formed, and the first female screw portion 3 corresponding to the nominal diameter D2 of the female screw is the plane of the sheet metal 1. It is formed in a part of the inner wall of the rectangular squeezing portion in a direction parallel to.

Further, at least both side edge portions 4a and 4b of the thin sheet metal 1 located in the respective openings of the rectangular squeezing drawing section 2 are formed in a flat plate shape. Then, in the flat sheet metal 1, the second screw portions 5a and 5b corresponding to the nominal diameter D2 are provided.
Are formed in parallel with the plane. The female thread is
The first screw portion 3 and the edge portion 4a of the square cut-and-draw portion 2,
Second threaded portions 5a, 5b of 4b are integrally formed together.

In addition, 6 is a male screw screwed to the integrally formed female screw.

According to the female screw member of the thin sheet metal described above, the male screw 6 to be screwed is the second screw portion 5a provided on the edge 4a of the thin sheet metal 1.
Is guided to the first threaded portion 3 of the rectangular squeezing portion 2 and further to the second threaded portion 5b provided on the edge 4b of the sheet metal 1. Therefore, the male screw 6 is attached to the edge 4
a and 4b are integrally formed with the rectangular squeezing portion 2 so that they are screwed into a screw, and correction forces act on each other to cause wobble, or
Can be tightened without loosening.

As a result, the female screw member of the thin sheet metal formed in the direction parallel to the plane of the thin sheet metal 1 can be formed with a small area such as the inner diameter D1 of the female screw plus the thickness of the thin sheet metal.

Further, since the number of screw pitches can be sufficiently secured, the number of screw pitches can be set arbitrarily.

FIG. 4 shows a perspective view of a case in which a female screw member of thin sheet metal is formed.

In the same figure, a plurality of female thread members of the above-mentioned thin sheet metal are formed in the vicinity of the opening surface of the case 7, and the cover 8 can be fixed by screwing the male thread 6.

Here, the position where the rectangular squeezing portion 2 is cut and raised and the sheet metal 1
The depth of the second threaded portion 5b formed on the edge portion 4b is formed at a position and a depth corresponding to the length of the thread of the male thread 6 to be engaged with each other so that a correction force acts on each other. Further, the sheet thickness of the thin sheet metal 1 is at least twice as high as the screw engaging height, so that it is possible to form an integral female screw member.

The present invention is not limited to the above embodiment,
Various modifications are possible within the scope of the present invention,
It is needless to say that the squeezing portion 2 can adopt another rectangular shape different from the one formed in a V shape.

[Effects of the Invention] As described above, the female screw member of the thin sheet metal of the present invention can be formed in a small area. Therefore, when formed in a case or the like, most of the internal holding area is used for mounting parts or the like. Therefore, it is possible to minimize the reduction in the volume of the mounted components. Further, the female screw member can be formed even in a narrow place.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) show a female screw member of a thin sheet metal according to an embodiment of the present invention. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. FIG. 6C is a right side view, FIG. 2 is the same enlarged perspective view, FIG. 3 is the same enlarged cross-sectional view, and FIG. 4 is the perspective view of the case in which the female screw member of the thin sheet metal is also formed.
FIGS. (A), (b) and (c) are views showing a conventional reinforced thin sheet metal female thread member, and FIG. 6 is a perspective view of a case in which the thin sheet metal female thread member is formed. 1: Sheet metal, 2: Cut drawing part 3: First screw part 4a, 4b: Edge part 5a, 5b: Second screw part, 6: Male screw 7: Case D1: Inner diameter D2: Nominal diameter

Claims (1)

[Scope of utility model registration request] 1. A rectangular squeezing portion formed by cutting and raising a thin metal plate having an inner wall circumscribing the inner diameter of the female screw, and a part of the inner wall of the rectangular squeezing portion corresponding to the nominal diameter of the female screw. The first screw part formed by the above and the thin sheet metal located on both side edge portions of the opening of the square squeezing portion are made flat, and the flat sheet metal corresponds to the nominal diameter of the female screw. And a second screw portion formed by forming a female screw integrally with the first screw portion and the second screw portion in parallel with the plane of the thin sheet metal. Female thread member.