JP2003148422A - Tapped hole forming device for sheet-like metal piece of article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an article with a tapped hole, capable of preventing rusting of the article itself due to separation of a plated machined surface of the tapped hole part. SOLUTION: A stopping cylinder 2 and a screw cylinder 3 are projected on one side surface 1a of a fitting piece 1 made of a sheet-like metal piece. The sheet-like metal piece 4 of the article on which the one side surface 1a of the fitting piece 1 is superposed is provided with a stop hole 5 where the stopping cylinder 2 is engaged and caulked to be stopped, and a receiving hole 6 where the screw cylinder 3 is engaged.

Description

Description: BACKGROUND OF THE INVENTION When attaching (assembling) an article to another article, a screw hole is provided in a sheet-like metal piece of the article, and the other screw hole is provided in the screw hole. In some cases, a means for screwing a screw (rod) through an article is employed. The present invention relates to an apparatus for forming a screw hole applied to such an attaching means in the sheet-like metal piece of the article. It is. 2. Description of the Related Art Conventionally, screw holes are provided directly on a sheet-like metal part of an article (if the metal part does not have a sufficient thickness to provide a screw hole, it is formed by stamping. A cylindrical portion is provided, and a screw is engraved on the inner surface of the cylindrical portion). [0003] In the prior art, the screw hole is formed directly in the metal part. Therefore, if the metal part is plated for the purpose of rust prevention after the screw hole is formed, the screw is crushed. ,
Even if the screw is not crushed, the screwed screw screws the plated surface to peel off the plating effect, and if a screw hole is formed after plating, the plated surface peels due to the engraving of the screw, and the plating effect is also lost. [0004] A sheet metal part of an article in which a fixing cylinder and a screw cylinder are projected from one side of a mounting piece made of a sheet metal piece and the one side of the mounting piece is superimposed. And a receiving hole that engages with the screw cylinder and a receiving hole that engages with the screw cylinder. The present invention has been made to correct such disadvantages of the conventional example. FIG. 1 shows an embodiment of an apparatus for forming a screw hole in a sheet-like metal part of an article according to the present invention. FIG. 1 is a front view showing an article attached to another article, and FIG. FIG. 2 is an enlarged cross-sectional view taken along line xx of FIG. 1. The article A of the embodiment is constructed such that another article B is
It is attached to another article B so as to be hooked, and the support wire a is used with the holding piece C, and a fastening nut c is screwed to a fastening bolt b as a holding means. However, the application of the present invention need not be limited to the article A of the embodiment. In the drawing, reference numeral 1 denotes a horizontally long mounting piece made of a sheet-like metal piece. In this mounting method 1, a fastening cylinder 2 is provided at the center, and screw cylinders 3 and 3 are provided on both sides of the fastening cylinder 2 on one side. The fastening cylinder 2 is formed by extrusion molding, and the screw cylinder 3 is formed by stamping a screw on the inner surface of a cylindrical body that is punched in the same direction as the fastening cylinder 2. It is formed. A fastening hole 5 for engaging and securing the fastening cylinder 2 with the sheet metal piece 4 of the article A and the screw cylinders 3 on both sides of the fastening hole 5 are provided. Receiving holes 6, 6
The screw cylinder 3 is engaged with the receiving hole 6, and the fastening cylinder 2 is engaged with the fastening hole 5, respectively.
Then, the mounting piece 1 is integrally attached to the metal piece 4, and a screw hole (consisting of the screw cylinder 3) is substantially formed in the metal piece 4. Then, the other one side 4b of the metal piece 4 of the article A with respect to one side close to the one side 1a
Is superimposed on the piece 7 of the other article B, and the fixing screw 9 is screwed into the screw cylinder 3 through the through hole 8 provided in the piece 7 to attach the article A to the article B. As a result, the article B can be hooked on the support line a via the article A. It is desirable that the respective distal ends of the fixing cylinder 2 and the screw cylinder 3 do not project from the holes 5 and 6 when they are engaged with the fixing hole 5 or the receiving hole 6. As shown in FIG. 2, no protrusion is formed between the sheet-shaped metal piece 4 and the piece 7, and the fixing by the fixing screw 9 is reliably performed. Although the positional relationship and the number of the fixing cylinder 2 and the screw cylinder 3 may be freely selected, it is better to arrange the screw cylinders 3 on both sides of the fixing cylinder 2 as in the embodiment. ,
By providing the fastening cylinder 2 and the screw cylinder 3 such that the metal piece 4 is interposed between the piece 7 and the mounting piece 1,
Since no external force is applied in the direction in which the mounting piece 1 and the metal piece 4 are separated from each other (after fastening with the fixing screw 9), a stable assembly state of the articles A and B can be obtained. When the mounting piece 1 is made of a metal having excellent corrosion resistance, an inexpensive article having an excellent rust prevention function as a whole can be obtained. Since the present invention has the above-described configuration,
The screw hole can be provided on the article provided with the screw hole without impairing the plating effect of the article itself. That is, it is possible to provide an article with a screw hole without rust of the article itself due to peeling of the plated surface of the screw hole, and the range of application is wide and practical.

[Brief description of the drawings] FIG. 1 is a front view of a state where an article is attached to another article. FIG. 2 is an enlarged sectional view taken along line xx of FIG. 1; [Explanation of symbols] 1 Mounting piece 1a One side 2 Stopper cylinder 3 screw holes 4 Sheet metal parts 5 fastening holes 6 receiving hole

   ────────────────────────────────────────────────── ─── Continuation of front page    (71) Applicant 000000295             Oki Electric Industry Co., Ltd.             1-7-12 Toranomon, Minato-ku, Tokyo (72) Inventor Mitsuru Suganuma             167 Kamihongo, Matsudo-shi, Chiba Iwabuchi strain             In the formula company (72) Inventor Taku Hashimoto             2-3-1 Otemachi, Chiyoda-ku, Tokyo Sun             Within the Telegraph and Telephone Corporation (72) Inventor Takamichi Igawa             3-15 Babacho, Chuo-ku, Osaka-shi, Osaka             Within the Telegraph and Telephone Corporation (72) Inventor Misao Iwatari             1753 Shimonuma, Nakahara-ku, Kawasaki-shi, Kanagawa             Ki Co., Ltd. (72) Inventor Hiroshi Matsumoto             1753 Shimonuma, Nakahara-ku, Kawasaki-shi, Kanagawa             Ki Co., Ltd. (72) Inventor Masashi Takano             1753 Shimonuma, Nakahara-ku, Kawasaki-shi, Kanagawa             Ki Co., Ltd. (72) Inventor Keisa Iwagaya             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industrial Co., Ltd. F term (reference) 3J001 FA02 GA01 GB06 HA02 HA07                       JA00 KA21

Claims (1)

Claims: 1. A sheet metal part of an article, wherein a fixing cylinder and a screw cylinder are protruded on one side of a mounting piece made of a sheet metal piece, and the one side of the mounting piece is superimposed. A screw hole forming apparatus for a sheet-like metal piece of an article, comprising: a fastening hole for engaging and fastening the fastening cylinder and a receiving hole for engaging the screw cylinder.