JPH0134694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a metal handle having a functional shape and beautiful appearance.

Conventionally known methods for manufacturing metal handles have mainly been by casting or by bending a metal tube or rod.

However, with the former manufacturing method, ordinary casting does not have sufficient strength and it is difficult to obtain a beautiful appearance, whereas high precision methods such as die casting have the disadvantage of high manufacturing costs. The latter manufacturing method had disadvantages such as distortions inevitably occurring in the bent portions, impairing the appearance.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a relatively simple and inexpensive method for producing a metal handle having a functional shape and an aesthetic appearance.

Below, explanations will be made using reference numerals in the drawings.
In the method for manufacturing a metal handle of the present invention, a pair of upper and lower cores 1, each having a semi-cylindrical horizontal piece 1a and a vertical piece 1b arranged so that the outside is flat and the inside is curved,
Cast 1. Then, a metal plate 2 having a sufficient width to cover each core 1 and a sufficient length to cover each core 1 and form a handle is cut out.

This metal plate 2 has an apex 3a at a location corresponding to the length of the horizontal piece 1a from the top and bottom ends of the metal plate 2 and a half of the outer circumference of the curved surface inside the core from the left and right ends.
4a, and a pair of upper and lower chevron-shaped cutout recesses 3, 3 and 4, 4 having two sides slightly curved outward,
Provided at the same time as the overall cutout.

The bent portion 1c of the upper core is placed between the vertices 3a, 3a of the upper notch recesses 3, 3, and the bent portion 1c of the lower core 1 is placed between the vertices 4a, 4a of the lower notch recesses 4, 4. After placing the metal plate 2, a pair of upper and lower cores 1, 1 is formed by bending the metal plate 2 along each of the cores 1, 1.
1.

Thereafter, the grooves 5 formed so that the left and right peripheral edges of the metal plate 2 face each other are welded, and the welded surfaces are polished, and the exposed end surfaces of the horizontal pieces 1a, 1a of the upper and lower cores are processed and screwed. Holes 6, 6 are provided.

In the illustrated embodiment, the core 1 is made of cast iron, which is inexpensive, and the metal plate 2 is made of stainless steel, which is expensive but has high corrosion resistance and gloss. Since this stainless steel metal plate 2 covers the core 1 and forms the main body of the handle, the metal handle obtained by the method of the present invention does not corrode even after many years of use, and is a beautiful metal. Maintains shine.

In addition, while this metal handle features a flat outer circumferential surface and a straight bent part, the inner surface of the handle is curved, so you won't feel any discomfort when gripping the handle, and it won't hurt even if you squeeze it tightly. , it is possible to exert sufficient gripping force and pulling force necessary for opening the door.

As described above, in the manufacturing method of the present invention, a pair of upper and lower cores 1, 1 having screw holes 6 for attachment are attached to a metal plate 2.
Since the metal plate 2 is coated with metal and then welded and polished, it is possible to significantly reduce material costs and save a considerable amount of time compared to the case where the entire body is tightly cast with the same metal as the metal plate 2. Weight reduction can be measured.

In addition, the pair of upper and lower cores 1, 1 is a semi-cylindrical horizontal piece 1 so that the outside is flat and the inside is curved.
A and a vertical piece 1b are connected and the metal plate 2 is bent along the side of the core, so it has a function that cannot be obtained by conventional bending of metal tubes or metal rods. It is easy to manufacture handles that are beautiful and have an easy-to-grip shape.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view before covering the upper and lower cores with metal plates cut out in a predetermined shape, and FIG. 2 shows a welding process after the coating process is completed. FIG. 3 is a perspective view of the metal handle before entering the polishing process. 1... Core, 2... Metal plate, 3, 4... Notch recess, 5... Groove, 6... Screw hole.

Claims (1)

[Claims] 1 Cast a pair of upper and lower cores 1, 1 in which a semi-cylindrical horizontal piece 1a and a vertical piece 1b are connected so that the outside is flat and the inside is a curved surface, and the necessary and sufficient amount to cover the core 1 is cast. A metal plate 2 having a width corresponding to the width and a length necessary and sufficient to cover the core 1 and forming a handle is cut out, and from the upper and lower ends of the metal plate 2 correspond to the length of the horizontal piece 1a and from the left and right ends. Vertices 3a and 4 are located at locations corresponding to half of the outer circumference of the inner curved surface of the core.
a, and a pair of upper and lower chevron-shaped cutout recesses 3, 3 and 4,4 having two sides curved slightly outward are provided, and an upper core is provided between the vertices 3a, 3a of the upper notch recesses 3, 3. After placing the bent portions 1c, 1c of the lower core 1 between the vertices 4a, 4a of the lower notch recesses 4, 4, the metal plate 2 is placed along the side surface of each core. A groove 5 is formed by bending and covering a pair of upper and lower cores 1, 1, with the peripheral edges of the metal plate 2 facing each other.
A method for manufacturing a metal handle, characterized in that the welded surfaces are polished, and the exposed end faces of horizontal pieces 1a, 1a of each core are processed to provide screw holes 6, 6.