JPS62292104A - Production of upper surface curved type block segment for forming chain strip - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a method for manufacturing upper curved block pieces for knitting multi-row interlocking chain bands for bracelets or wristwatches.

[Problems to be Solved by the Invention] Upper curved block pieces (quadrilateral including rectangles in plan view,
Traditionally, the top surface has a gently curved raised shape and a radius is added between the top surface and each side surface, and due to the uniqueness of its shape, it has been formed one by one by stamping. There is a problem in that it takes a lot of time and effort to form the number of block pieces required to knit the chain, and it also makes the knitting of the chain belt extremely complicated. The present invention attempts to solve these problems.

<Structure of the Invention> The present invention is a method for manufacturing the upper curved block piece of a chain band in which a large number of upper curved block pieces are interlocked and connected via a bottle for use in bracelets or wristwatches, etc. The pieces are made by cutting long and short pieces of metal irregularly shaped rods or irregularly shaped metal wires into lengths and shorts for each engagement row, by skillfully cutting steps to form the stepped portions for the engaging gaps, and by stamping the convex portions left between the stepped portions. A method for manufacturing an upper curved block piece for knitting a chain belt, characterized in that it is integrally formed on a deformed rod or a deformed wire.

<Example> Examples will be described below based on the drawings.

A large number of materials 1.2 of two types, long and short, are cut by cutting irregularly shaped metal rods, and a cutting process is performed to form a plurality of stepped portions 3 in the upper half of the alternating positions of one image material, and then between the stepped portions 3. The remaining convex portions 4a are stamped using a press to form the upper curved block piece 4. % Both sides of the material 1.2 below the stepped portion 3 are cut out by a die-cutting process to form an interlocking gap [5] together with the one stepped portion 3. The upper curved block pieces 4 are obtained in a form in which a plurality of pieces are integrally mounted on a thin central shaft plate 6 left below the center of the gap 5, and in two types that can be interlocked.

Incidentally, slopes 8 are provided on both upper surfaces of the center shaft plate 6 in correspondence with the slopes 7 provided on the piece 4 to provide bending conformity.

In Figures A, E, and O, the material and the upper curved block piece 4 are expanded in the connection direction, and a dividing line #49f is attached in the longitudinal direction or width direction of the upper surface of the piece 4 to make the design different,
An example is shown.

In both cases, along with the embodiments described above, the central shaft plate 6 has two glazes.
The attached upper curved block pieces 4 are interlocked, and a bottle 10 is inserted and connected between the two pieces 4 on both sides in the width direction, thereby forming a chain belt of a predetermined length.

<Effects of the Invention> As described above, the present invention provides step sections on a material cut into two lengths and short sections, and stamps the convex portions left between the step sections to form an upper curved block piece. Since the piece is formed with a relatively small punching force, the piece can be formed with a relatively small punching force, and there is an effect that the equipment for double punching can be made smaller and the equipment cost can be reduced.

Further, since a plurality of upper curved block pieces are formed in each row on the central shaft plate, the interlocking connection for chain band knitting is facilitated and efficient.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of a chain belt knitted using the method of the present invention, Fig. 2 is an enlarged longitudinal sectional view of the same portion, and Fig. 3 AB
4 is a perspective view showing a state in which a step section is cut and formed on the material, FIG. 5 is a perspective view showing a state in which an upper curved block piece is formed by stamping, and FIG. Figure 6 is a plan view showing how the central shaft plate is formed by the die-cutting process, Figure 7 is a plan view showing the central shaft plate with a beveled surface, and Figure 8 is a plane view showing the interlocking pin fastening part of the chain band. Figures 9A, B, and O are perspective views showing other embodiments showing a part of the chain band, 1.2 is wood cut into long and short pieces, 3 is a step part, 4 is an upper curved block piece, 6 is a center shaft plate, 7 is a slope of the piece 4, 8 is a slope of the center shaft plate, 9 is a dividing line groove, and 10 is a bottle. 71

Claims (1)

[Claims] (1) A method for manufacturing the upper curved block piece of a chain band in which a large number of upper curved block pieces are interlocked and connected with pins for use in bracelets or wristwatches, etc. A stepped part for the interlocking gap is formed in the upper half of the irregularly shaped metal rod or irregularly shaped metal wire that is cut into lengths and shorts in each row by a cutting process, and the protrusions left between the paragraph parts are stamped to create the irregularly shaped rod or irregular shape. A method for manufacturing an upper curved block piece for chain band knitting, which is characterized in that it is formed integrally on a line.