JP2010240076A - Accessory chain and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accessory chain whose cavities are invisible as if their insides are full and which is supple and full of beauty, and to provide a method for manufacturing the same. <P>SOLUTION: The accessory chain has several square tubes 2 which are formed by bending belt-like metal. The square tubes 2 are combined with one another to form a chain so that the side of one square tube 2 may pass through the cavity of neighboring one. Two side faces 2a, 2a of each of the square tubes 2 perpendicular to the length of the accessory chain are curved so that they may be protruded in one direction parallel to the length of the accessory chain. Two side faces 2b, 2b of each of the square tubes 2 parallel to the length of the accessory chain are close to each other so that cavities in the accessory chain 1 may not be seen through. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a jewelry chain and a method for manufacturing the same.

  In particular, the present invention is generally referred to as a “Venetian chain” in which metal rectangular cylinders are combined in a chain so that one side surface of one rectangular cylinder passes through a hollow portion of another adjacent rectangular cylinder. The present invention relates to a jewelry chain that does not allow a hollow portion inside the jewelry chain to be seen through, i.e., the interior of the jewelry chain is transparent, and that is filled with flexibility and aesthetics, and a method of manufacturing the same. .

  Conventionally, an accessory chain in which metal square cylinders are combined in a chain shape so that one side surface of one square cylinder passes through a hollow portion of another square cylinder adjacent to the square cylinder has been used. Since this accessory chain is called a “Venetian chain”, the conventional accessory chain is hereinafter referred to as a Venetian chain for convenience.

  FIG. 13 is a perspective view of a conventional Venetian chain 18.

  FIG. 14 shows the side of the Venetian chain 18 of FIG.

  The Venetian chain 18 bends a strip-shaped noble metal plate material into a rectangular tube body 19, but in the process of forming the rectangular tube body 19, the hollow portion of another rectangular tube body 19 adjacent to one side surface of one rectangular tube body 19. In other words, the rectangular cylinders 19 are combined to form a chain.

  Utility Model Registration No. 3004364 discloses one method of manufacturing a Venetian chain.

  Since the Venetian chain 18 is flexible, the Venetian chain 18 forms a flat surface that is continuous along the longitudinal direction of the chain, that is, a surface in which the outer surfaces of the respective rectangular cylinders 19 are aligned. As widely used.

  However, as shown in FIG. 14, in the Venetian chain 18, a gap 20 is formed between the rectangular cylinders 19 and the rectangular cylinders 19 that are in the same direction, that is, between every other adjacent square cylinders 19.

  The Venetian chain 18 may be seen through the gap 20 and the other side may be seen, or the hollow portion inside each square cylinder 19 may be seen, which gives the viewer the feeling of a hollow chain. There was a disadvantage that lacked luxury.

  On the other hand, in order to overcome the hollow feeling of the chain, Japanese Patent Application Laid-Open No. 10-33222 proposes an accessory chain in which the internal cavity is not visible. Japanese Patent Application Laid-Open No. 10-33222 discloses a chain formed by continuously forming a ring made of double-threaded noble metal wires, compressing the chain from the longitudinal direction, and then orthogonally crossing the longitudinal direction of the chain with a hammering machine. The pressure is applied from the direction of the circumference, that is, from the circumferential direction to form a circular cross-section while crushing the internal gap, and the circumference is cut with a diamond cutter to form a flat surface along the longitudinal direction of the chain. A method for manufacturing a jewelry chain is disclosed.

Registered Utility Model No. 3004364 JP-A-10-33222

  As described above, in the Venetian chain, a gap 20 (see FIG. 14) is formed between the rectangular cylinders in the same direction and between the rectangular cylinders, that is, between every other adjacent square cylinders. A hollow portion inside one rectangular tube 19 can be seen from the outside.

  The Venetian chain has the disadvantage that it gives a feeling that the gap and the hollow portion visible from the outside are hollow chains, and lacks a high-class feeling.

  On the other hand, the technique disclosed in Japanese Patent Laid-Open No. 10-33222 can avoid the feeling of a hollow chain. However, when a chain is formed by continuously forming double-threaded rings, the chain is compressed from the longitudinal direction. In addition, since the diameter of the noble metal wire is thinner than the outer periphery of the ring body, it is often difficult to compress it into an appropriate shape in the compression process. Moreover, because of the double ring body having some complicated curves, the shape of the mold to be compressed and the machining process are complicated.

  In the technique disclosed in Japanese Patent Application Laid-Open No. 10-33222, when the diameter of the noble metal wire is thin, the last step of cutting the peripheral surface with a diamond cutter has a limitation in cutting and grinding.

  Accordingly, the problem to be solved by the present invention is to provide a jewelry chain that is not visible in the cavity as if the interior is substantial and that is full of flexibility and aesthetics, and a method for manufacturing the same.

The jewelry chain of the present invention is
A plurality of rectangular cylinders formed by bending a band-shaped metal, and each of the rectangular cylinders is combined with each other in a chain shape so that one side surface thereof passes through a hollow portion of another adjacent rectangular cylinder In the chain
Two side surfaces in a direction perpendicular to the longitudinal direction of the accessory chain of each square tube are curved so as to protrude in one direction parallel to the longitudinal direction of the accessory chain, and in the longitudinal direction of the accessory chain of each square tube The two side surfaces in the parallel direction are characterized in that they are close to each other so that the cavity inside the jewelry chain cannot be seen through.

Other jewelry chains of the present invention are:
A plurality of rectangular cylinders formed by bending a band-shaped metal, and each of the rectangular cylinders is combined with each other in a chain shape so that one side surface thereof passes through a hollow portion of another adjacent rectangular cylinder In the chain
Two side surfaces of each square tube body in a direction orthogonal to the longitudinal direction of the accessory chain are curved so as to protrude toward the inside of the square tube body, and are parallel to the longitudinal direction of the accessory chain of each square tube body. The two sides of the direction are characterized in that they are close to each other so that the cavity inside the jewelry chain is not seen through.

  In addition, at least a part of the outer peripheral surface of each square tube body may be ground so that a plane is formed along the longitudinal direction of the accessory chain.

The method of manufacturing a jewelry chain according to the present invention includes:
A step of forming a clothing accessory chain by forming a rectangular tube formed by bending a band-shaped metal in a chain so that one side surface of one rectangular tube passes through a hollow portion of another rectangular tube adjacent thereto. ,
The accessory chain is gripped on both sides of the rectangular cylinder to be compressed, and two side surfaces in a direction orthogonal to the longitudinal direction of the accessory chain of the square cylinder to be compressed protrude in one direction parallel to the longitudinal direction of the accessory chain. The rectangular cylinder to be compressed is compressed in the longitudinal direction of the jewelry chain until it is bent, the jewelry chain is sent a predetermined number of frames, and the compression is repeated, so that almost all the rectangular cylinders of the jewelry chain are stretched in the longitudinal direction of the jewelry chain. Compressing in the direction;
The accessory chain is orthogonal to the longitudinal direction of the chain until the two side surfaces of each rectangular cylinder in the direction parallel to the longitudinal direction of the accessory chain approach each other to such an extent that the hollow portion inside the accessory chain cannot be seen through. Compressing in the direction of
It is characterized by having.

Another method of manufacturing a jewelry chain according to the present invention is as follows.
A step of forming a clothing accessory chain by forming a rectangular tube formed by bending a band-shaped metal in a chain so that one side surface of one rectangular tube passes through a hollow portion of another rectangular tube adjacent thereto. ,
The accessory chain is gripped on both sides of the rectangular cylinder to be compressed, and two side surfaces in a direction perpendicular to the longitudinal direction of the accessory chain of the square cylinder to be compressed are curved convexly toward the inside of the square cylinder. The square cylinders to be compressed are compressed in the longitudinal direction of the accessory chain, the predetermined number of frames are sent to the accessory chain, and the compression is repeated until almost all of the rectangular cylinders in the accessory chain are moved in the longitudinal direction of the accessory chain. Compressing, and
The accessory chain is orthogonal to the longitudinal direction of the chain until the two side surfaces of each rectangular cylinder in the direction parallel to the longitudinal direction of the accessory chain approach each other to such an extent that the hollow portion inside the accessory chain cannot be seen through. Compressing in the direction of
It is characterized by having.

  In the step of compressing the rectangular tube body in the longitudinal direction of the accessory chain, the compressed side portion of the accessory chain among the both sides of the rectangular tube object to be compressed is gripped by the compression receiving mold, and the uncompressed side of the accessory chain is The part is gripped by a compression push mold, the compression push mold grips the rectangular cylinder without slipping, and the compression receiving mold initially grips the square cylinder so that it can slide, and pressure is applied in the longitudinal direction. As the gripping force is increased, the rectangular tube body of a predetermined number of frames is sent to the compression receiving die side in the process in which the compression receiving die increases the gripping force, and then the compression receiving die and the compression pushing die are square tubes. The rectangular cylinder to be compressed can be compressed and deformed by gripping the body without slipping.

  It may further include a step of grinding at least a part of the outer peripheral surface of each of the square cylindrical bodies so that a plane is formed along the longitudinal direction of the accessory chain.

The perspective view of the accessory chain by 1st embodiment of this invention. The side view of the accessory chain by 1st embodiment of this invention. The expanded longitudinal cross-sectional view of the one part square cylinder of the accessory chain by 1st embodiment of this invention. The perspective view of the accessory chain by 1st embodiment of this invention at the time of forming a square cylinder with a thin-walled wide noble metal plate material. The perspective view of the accessory chain by 2nd embodiment of this invention. The side view of the accessory chain by 2nd embodiment of this invention. The expanded longitudinal cross-sectional view of some square cylinders of the accessory chain by 2nd embodiment of this invention. Explanatory drawing which showed the accessory chain formation process of the manufacturing method of the accessory chain of this invention. Explanatory drawing which showed the structure of the compression process of the manufacturing method of the jewelry chain of this invention. Explanatory drawing which showed the deformation | transformation mechanism of the square cylinder in the manufacturing method of the jewelry chain of this invention. Explanatory drawing which showed the other deformation | transformation mechanism of the square cylinder in the manufacturing method of the jewelry chain of this invention. The perspective view which showed the accessory chain which at least one part of the outer peripheral surface of each square cylinder ground so that a plane might be formed along the longitudinal direction of an accessory chain. The perspective view of the conventional Venetian chain. The side view of the conventional Venetian chain.

  Embodiments of the present invention will be described below.

FIG. 1 shows a perspective view of a jewelry chain according to a first embodiment of the present invention.
FIG. 2 shows a side view of the accessory chain of the present embodiment.

  FIG. 3 shows an enlarged vertical section of a part of a rectangular tube of the accessory chain according to the present embodiment.

  The accessory chain 1 of the present embodiment has a plurality of rectangular cylinders 2 formed by bending a strip-shaped metal, preferably a noble metal plate, into a rectangular cylinder.

  The rectangular cylinder 2 is connected to each other so that one side surface thereof passes through the hollow portion of the adjacent rectangular cylinder 2, that is, in a chain form, thereby forming the accessory chain 1.

  In FIG. 1, for easy understanding, the second rectangular cylinder 2 from the lowermost end of the accessory chain 1 is removed and shown.

  As can be clearly seen in the rectangular cylinder 2 at the lowermost end of FIG. 1, the rectangular cylinder 2 has two side surfaces 2a, 2 in a direction perpendicular to the longitudinal direction of the accessory chain 1 parallel to the longitudinal direction of the accessory chain. Curved so as to be convex in one direction.

  Further, the two side surfaces 2b, 2b in the direction parallel to the longitudinal direction of the accessory chain 1 of the square tube 2 are close to each other so that the hollow portion inside the accessory chain cannot be seen through.

  Here, “the internal cavity cannot be seen through” does not mean that there is no gap on the outer surface so that the internal cavity is not visible at all in a strict sense, as described above. Although there is a certain gap, there is a certain width from the extent that the internal cavity can not be seen with the naked eye to the extent that the other side of the chain cannot be seen through the internal cavity, but the internal cavity can be easily seen and hollow. It means that it does not give a special feeling.

  Since the accessory chain 1 of the present embodiment is compressed in the longitudinal direction and is also compressed from the circumferential direction, as shown in FIG. 3, the hollow portion inside the rectangular tube body 2 is small, and the hollow The part is substantially filled with the side surface 2a of the rectangular tube body 2 in the direction orthogonal to the longitudinal direction of the accessory chain.

  As shown in the two rectangular cylinders 2 at the lower end of FIG. 2, the accessory chain 1 of the present embodiment has side surfaces 2 a in the direction perpendicular to the longitudinal direction of the accessory chain of two adjacent rectangular cylinders 2 in the same direction. Since it is curved, the gap 3 therebetween is curved, and when viewed from the side of the jewelry chain 1, for example, from the direction of the arrow V in FIG. 2, the hollow portion inside the jewelry chain 1 or the other side of the jewelry chain 1 is transmitted. It can be prevented from giving a feeling of a hollow chain.

  Further, even if the angle is changed from the side of the accessory chain 1, the side surface 2b of the rectangular tube body in the direction parallel to the longitudinal direction of the accessory chain of the square tube member 2 approaches and the inside is clogged as shown in FIG. Therefore, it is possible to prevent the hollow portion inside the accessory chain 1 from being seen through and giving a hollow chain feeling.

  FIG. 4 shows an accessory chain having the same shape as that in FIG. 1, but shows an accessory chain made of a rectangular tube 2 that is thinner and wider.

  In FIG. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the second rectangular tube 2 from the lowermost end of the accessory chain is removed for easy understanding.

  As shown in FIG. 4, even when the rectangular tube body 2 is formed of a thin and wide noble metal plate, the accessory chain does not pass through the inner cavity portion, and looks like a solid metal column. Moreover, according to the present invention, it is possible to provide an accessory chain that looks like a solid metal column but has a light weight and has a mysterious beauty with flexibility.

  Next, the accessory chain of the second embodiment of the present invention will be described.

  5-7 shows an accessory chain according to a second embodiment of the present invention, FIG. 5 is a perspective view of the accessory chain of the second embodiment, FIG. 6 is a side view thereof, and FIG. 7 is an accessory of the second embodiment. The longitudinal cross-sectional view which expanded and showed the square cylinder body of a part of chain is shown, respectively.

  As in the first embodiment, the accessory chain 4 of the present embodiment has a plurality of rectangular cylinders 5 formed by bending a belt-like, preferably noble metal plate, into a rectangular cylinder.

  The rectangular cylinders 5 are connected to each other in a chain shape so that one side surface passes through the hollow portion of the other adjacent rectangular cylinder 5 to form the accessory chain 4.

  In FIG. 5, for easy understanding, the second rectangular cylinder 5 from the lowermost end of the accessory chain 4 is removed.

  As can be clearly seen from the lowermost rectangular cylinder 5 in FIG. 5, the rectangular cylinder 5 has two side surfaces 5 a and 5 a in a direction orthogonal to the longitudinal direction of the accessory chain 4. Curved so as to be convex.

  Further, the two side surfaces 5b, 5b of the rectangular cylinder 5 in the direction parallel to the longitudinal direction of the accessory chain 4 are close to each other so that the hollow portion inside the accessory chain cannot be seen through.

  “The hollow part inside the jewelry chain cannot be seen through” has the same meaning as described above.

  As shown in FIG. 7, since the accessory chain 4 of the present embodiment is compressed in the longitudinal direction and also compressed from the circumferential direction, the hollow portion inside the rectangular cylindrical body 5 is small, and the cavity The part is substantially filled with the side surface 5a of the rectangular cylinder 5 in the direction perpendicular to the longitudinal direction of the accessory chain.

  As shown in the two rectangular cylinders 5 at the lower end of FIG. 6, the accessory chain 4 of the present embodiment has side faces 5 a in the direction orthogonal to the longitudinal direction of the accessory chain of two adjacent rectangular cylinders 5. Since it is curving convexly toward the inside of the cylindrical body 5, the central portion of the gap 6 therebetween is wider than that of a normal Venetian chain. However, the entrance 6a of the gap is a portion where the adjacent rectangular cylinders 5 come into contact with each other. Therefore, when viewed from the side of the accessory chain 4, for example, from the direction of the arrow V in FIG. The hollow portion or the other side of the accessory chain 1 does not appear to be transmitted, and it is possible to prevent giving a hollow chain feeling.

  Further, even when the angle is changed from the side of the accessory chain 4, the side surface 5b of the rectangular cylinder 5 in the direction parallel to the longitudinal direction of the accessory chain of the square cylinder 5 approaches and the inside is clogged as shown in FIG. Therefore, it is possible to prevent the hollow portion inside the accessory chain 1 from being seen through and giving a hollow chain feeling.

  Next, the manufacturing method of the jewelry chain by this invention is demonstrated below.

  In order to form the accessory chain of the present invention, first, an accessory chain similar to a conventional Venetian chain is formed.

  FIGS. 8A, 8B, and 8C show a process for forming an accessory chain similar to the Venetian chain.

  As shown in FIG. 8 (a), a strip-shaped metal plate 6 is inserted into a rectangular cylinder 7, cut at a location P so as to have an appropriate length, and as shown in FIG. The metal plate member 6 is bent so that one side surface of the rectangular cylinder passes through the hollow part of another adjacent rectangular cylinder.

  Subsequently, as shown in FIG. 8 (c), the metal plate 6 is bent so as to form the rectangular cylinder 7, and finally the butt Q is joined by an appropriate means such as laser welding or brazing, or , Leave it folded without joining.

  By doing so, a chain-like accessory chain is formed by passing one side surface of one rectangular cylinder 7 through the hollow portion of another adjacent rectangular cylinder 7.

  Next, a process of compressing in the longitudinal direction of the accessory chain is performed.

  FIG. 9 shows a configuration for compressing in the longitudinal direction of the accessory chain.

  The jewelry chain 8 shown in FIG. 9 has an uncompressed portion 8a and a compressed portion 8b.

  In order to hold and compress the jewelry chain 8, compression receiving dies 9a and 9b and compression pressing dies 10a and 10b are provided.

  The compression “receiving” type and the compression “pushing” type are located on the side of sending the accessory chain 8 in the process of sending the accessory chain 8 while compressing, that is, on the upstream side of the sending direction of the accessory chain 8 (X direction in FIG. 9). The compression “push” type is located on the side to which the accessory chain 8 is fed, that is, the downstream side in the feed direction of the accessory chain 8.

  The compression receiving molds 9a and 9b are tools for gripping and compressing the compressed portion 8b of the accessory chain 8, and are divided into two parts in the vertical direction so that they can move up and down relatively. For example, as shown in the drawing, the upper compression receiving die 9a is configured to be movable in the Z direction with respect to the lower compression receiving die 9b.

  A groove 11 is formed in the meshing portion of the compression receiving molds 9a and 9b. The groove 11 is dimensioned so that the compressed part 8b of the jewelry chain 8 can be gripped.

  The shape of the groove 11 can be a groove having an inclined surface with an angle of 45 ° so that the accessory chain 8 rotated by 45 ° with respect to the axis can be gripped. Further, a part of the groove 11 of the compression receiving molds 9 a and 9 b has a tapered surface that slightly expands toward the downstream in the feed direction of the accessory chain 8. The tapered surface of the groove 11 slightly weakens the gripping force of the compression receiving dies 9a and 9b as compared with the compression pressing dies 10a and 10b, so that the accessory chain 8 can be connected to the compression receiving dies 9a and 9b in the compression process. It is intended to be sent to. Therefore, instead of providing a tapered surface in a part of the groove 11, any known method that can be carried out by those skilled in the art, such as adjusting the length of the groove 11 or controlling the gripping force in the groove 11, may be used.

  The compression pressing dies 10a and 10b are tools for gripping the uncompressed portion 8a of the accessory chain 8, and are divided into two parts in the vertical direction so that they can be moved up and down relatively. It can move relatively to 9b. For example, as shown in the figure, the upper compression die 10a can be moved in the Z direction with respect to the lower compression die 10b, and the compression die 10a, 10b can be moved in the X direction at the same time. ing. Instead of allowing the compression pressing molds 10a and 10b to move in the X direction, the compression receiving molds 9a and 9b move toward the compression pressing molds 10a and 10b, or the compression receiving molds 9a and 9b It is also possible to allow both the compression pressing dies 10a and 10b to move.

  Grooves 12 are also formed in the meshing portions of the compression pressing dies 10a and 10b. The groove 12 is dimensioned so that the uncompressed portion 8a of the jewelry chain 8 can be gripped.

  The longitudinal compression of the accessory chain 8 is performed so as to compress a predetermined number of compression target rectangular cylinders 13 at a time.

  When compressing the accessory chain 8 in the longitudinal direction, the compressed portion 8b of the accessory chain is gripped by the compression receiving dies 9a and 9b on both sides of the compression target rectangular tube 13, and the accessory chain is compressed by the compression push dies 10a and 10b. The uncompressed portion 8a is gripped, and the compression pressing dies 10a and 10b are moved toward the compression receiving dies 9a and 9b, that is, in the X direction in FIG.

  At this time, the compression pressing dies 10a and 10b grip the uncompressed portion 8a of the accessory chain without slipping, while the compression receiving dies 9a and 9b may initially slide the rectangular cylinder of the compressed portion 8b of the accessory chain. The gripping force is increased as the longitudinal pressure is applied, and the compressed portion 8b is gripped without slipping in the final stage of compression for deforming the compression target rectangular tube 13.

  As described above, the gripping force of the compression receiving dies 9a and 9b is gradually increased, and the groove 12 is provided with a tapered surface so that the gripping force is slightly smaller than that of the compression pressing dies 10a and 10b. The rectangular cylindrical body of the compressed portion 8b is sent to the compression receiving molds 9a and 9b in a process in which the compression receiving molds 9a and 9b increase the gripping force. At the final stage of the subsequent compression, the compression receiving molds 9a and 9b and the compression pressing molds 10a and 10b grip the accessory chain 8 without slipping on both sides of the compression target square cylinder 13, and are stable and large on the compression target square cylinder 13. A compressive force can be applied.

  As a result, the two side surfaces of the rectangular cylinder 13 to be compressed in the direction orthogonal to the longitudinal direction of the accessory chain 8 are deformed and become clogged in the length direction, and the gap between the adjacent rectangular cylinders is transmitted. Disappear.

  In the above description, the compression process in which the compression of the rectangular cylinder and the feeding of the rectangular cylinder are performed at the same time or almost simultaneously is performed, but the compression of the rectangular cylinder is performed, and then the rectangular cylinder is fed. Of course it is also possible to do.

  In this way, the above-described compression is repeated while feeding the accessory chain by a predetermined number of frames, that is, the number of the rectangular cylinders 13 to be compressed, and almost all the rectangular cylinders of the accessory chain 8 are compressed in the longitudinal direction of the accessory chain.

  Next, a compression process in a direction orthogonal to the longitudinal direction of the accessory chain is performed.

  In the compression process in the direction orthogonal to the longitudinal direction of the jewelry chain, the compressed portion 8b of the jewelry chain is rotated by 45 ° with respect to its axis, and the compression receiving molds 9a and 9b are engaged with each other so that the jewelry chain 8 is removed from its circumferential direction. Compress.

  Since the groove 11 has an inclined surface of 45 °, the compressed portion 8b of the accessory chain receives a compressive force from the circumferential direction, and the two side surfaces in the direction parallel to the longitudinal direction of the accessory chain of each square tubular body approach each other. Deform to

  In the compression process from the circumferential direction of the accessory chain, the two side surfaces of each rectangular tube in the direction parallel to the longitudinal direction of the accessory chain approach each other so that the hollow portion inside the accessory chain cannot be seen through. When it is up to the end.

  Instead of compressing from the circumferential direction after compressing almost all of the square cylinders of the accessory chain 8 in the longitudinal direction of the accessory chain, a predetermined number of the compression target rectangular cylinders 13 from the longitudinal direction of the accessory chain Immediately after the compression, the compression target rectangular cylinders 13 are compressed from the circumferential direction of the accessory chain, and the compression from the longitudinal direction and the compression from the circumferential direction are alternately performed for one accessory chain. It may be.

  Here, the mechanism by which each side surface of the rectangular cylinder is deformed by compression will be described.

  FIG. 10 shows a mechanism in which the two side surfaces of each rectangular tube in the direction orthogonal to the longitudinal direction of the accessory chain are curved so as to protrude in one direction parallel to the longitudinal direction of the accessory chain.

  FIG. 10A shows a compression process in the longitudinal direction of the accessory chain. In the compression process in the longitudinal direction of the jewelry chain, as shown in FIG. 10A, when the compressive force is increased, the two side surfaces in the direction orthogonal to the longitudinal direction of the clothing accessory chain of each compression target rectangular tubular body 13 are In the case of FIG. 10A, which is parallel to the longitudinal direction, it is curved so as to be convex upward.

  Along with this, as shown in FIG. 10A, the two side surfaces of each compression target square cylinder 13 in the direction parallel to the longitudinal direction of the accessory chain are slightly curved and curved. Since the two side surfaces of the rectangular cylinder 13 to be compressed in the direction parallel to the longitudinal direction of the accessory chain are deformed, in this state, the hollow portion inside the accessory chain is easily visible from the outside.

  FIG.10 (b) has shown the compression process from the circumferential direction of a jewelry chain. The arrow of FIG.10 (b) has shown the compressive force from the circumferential direction of a clothing accessory chain.

  By compression from the circumferential direction of the jewelry chain, as shown in FIG. 10 (b), the two side surfaces of each rectangular tube in the direction parallel to the longitudinal direction of the jewelry chain are transmitted through the hollow portion inside the jewelry chain. Approach each other so that they cannot be seen.

  In this way, by compressing the jewelry chain from the longitudinal direction and the circumferential direction, the jewelry chain according to the present invention does not see through the internal cavity, but gives the interior a feeling of being clogged with precious metal, creating a sense of quality. be able to.

  FIG. 11 shows a bending mechanism so that two side surfaces of each square tube body in a direction orthogonal to the longitudinal direction of the accessory chain are convex toward the inside of each square tube body.

  FIG. 11A shows a compression process in the longitudinal direction of the accessory chain. When a strong compressive force is applied to the compression target square cylinder 13 from the longitudinal direction of the accessory chain, the metal escapes sideways, so that as shown in FIG. The two side surfaces in the parallel direction are curved so as to bulge outward.

  Along with this, the two side surfaces of each compression target square cylinder 13 in the direction orthogonal to the longitudinal direction of the accessory chain are curved so as to protrude toward the inside of each compression target square cylinder 13.

  Next, FIG.11 (b) has shown the compression process from the circumferential direction of a jewelry chain. The arrow of FIG.11 (b) has shown the compressive force from the circumferential direction of a clothing accessory chain.

  By compression from the circumferential direction of the jewelry chain, as shown in FIG. 11 (b), the two side surfaces of each rectangular tube in the direction parallel to the longitudinal direction of the jewelry chain are transmitted through the hollow portion inside the jewelry chain. Approach each other so that they cannot be seen.

  As a result, the internal cavity is not seen through and the interior is filled with noble metal, and a high-class feeling can be created.

  It should be noted that the two side surfaces of the rectangular tubular body in the direction orthogonal to the longitudinal direction of the accessory chain are curved so as to protrude in one direction parallel to the longitudinal direction of the accessory chain as shown in FIG. Whether it is curved so as to be convex toward the inside of each rectangular cylinder depends on the outer dimensions of the rectangular cylinder, the thickness of the noble metal plate, and the like. According to the jewelry chain manufacturing method of the present invention, any phenomenon occurs depending on conditions such as the outer dimensions of the rectangular tube body and the thickness of the noble metal plate during compression of the jewelry chain in the longitudinal direction. The accessory chain in which the hollow portion inside the accessory chain cannot be seen through can be manufactured.

  Thus, by compressing the accessory chain from the longitudinal direction and the circumferential direction, the accessory chain immediately after compression may be somewhat inflexible.

  In this case, it is possible to obtain a flexible clothing accessory chain by correcting with an existing soft ring machine or by adapting the contact portions of the rectangular cylinders compressed in a barrel polishing process or the like.

  Finally, at least a part of the outer peripheral surface of each square tube body can be ground so that a plane is formed along the longitudinal direction of the accessory chain with respect to the compressed accessory chain.

  FIG. 12 shows an example of a ground accessory chain.

  In the example of FIG. 12, after performing the softening process, the jewelry chain 14 is moved in the longitudinal direction by a predetermined diamond cutting machine, and the side surface in the chain longitudinal direction of each rectangular cylinder 15 is preferably compressed by the clothing accessory chain 14. The flat surface 17 is formed by cutting to a depth at which distortion and the like can be removed. Further, each corner of the same side surface is cut deeply toward the center of each rectangular tube 15 to form a new plane 16. Preferably, cutting is performed until the planes 16 approach each other.

  In this way, the accessory chain 14 in which the side surfaces of the rectangular cylinder 15 in the longitudinal direction of the chain are cut has no gap between the adjacent square cylinders 15, and the steps and gaps of the alternately assembled square cylinders 15 are limited. It is possible to express the unity that is shielded from the outside, and a part of the outer peripheral surface (planes 16 and 17) of each of the closely connected rectangular cylinders forms a continuous bright surface along the longitudinal direction of the accessory chain. it can. The jewelry chain 14 thus formed has an approximately octagonal cross-sectional shape, becomes a prismatic body with eight brilliant peripheral surfaces, and is a high-class jewelry chain with no space or gaps seen from any direction. Become.

DESCRIPTION OF SYMBOLS 1 Trinket chain 2 Square cylinder 2a Side surface of the square cylinder in the direction orthogonal to the longitudinal direction of the jewelry chain 2b Side surface of the rectangular cylinder in the direction parallel to the longitudinal direction of the jewelry chain 3 Gap 4 Trinket chain 5 Square cylinder 5a Length of the jewelry chain Side surface in a direction orthogonal to the direction 5b Side surface of the rectangular cylinder in a direction parallel to the longitudinal direction of the jewelry chain 6 Metal plate material 7 Square cylinder 8 Jewelry chain 8a Uncompressed portion 8b Compressed portion 9a Compression receiving mold 9b Compression receiving mold 10a Compression push die 10b Compression push die 11 Groove 12 Groove 13 Compression target square cylinder 14 Accessories chain 15 Square cylinder 16 Plane 17 Plane 18 Venetian chain 19 Square cylinder 20 Gap P Cutting place Q Butt

Claims (7)

A plurality of rectangular cylinders formed by bending a band-shaped metal, and each of the rectangular cylinders is combined with each other in a chain shape so that one side surface thereof passes through a hollow portion of another adjacent rectangular cylinder In the chain
Two side surfaces in a direction perpendicular to the longitudinal direction of the accessory chain of each square tube are curved so as to protrude in one direction parallel to the longitudinal direction of the accessory chain, and in the longitudinal direction of the accessory chain of each square tube The jewelry chain characterized in that the two side surfaces in the parallel direction are close to each other so that a hollow portion inside the jewelry chain cannot be seen through. A plurality of rectangular cylinders formed by bending a band-shaped metal, and each of the rectangular cylinders is combined with each other in a chain shape so that one side surface thereof passes through a hollow portion of another adjacent rectangular cylinder In the chain
Two side surfaces of each square tube body in a direction orthogonal to the longitudinal direction of the accessory chain are curved so as to protrude toward the inside of the square tube body, and are parallel to the longitudinal direction of the accessory chain of each square tube body. The jewelry chain characterized in that the two side surfaces of the directions are close to each other so that the hollow portion inside the jewelry chain is not seen through.   The accessory chain according to claim 1 or 2, wherein at least a part of an outer peripheral surface of each square tube body is ground so that a plane is formed along a longitudinal direction of the accessory chain. A step of forming a clothing accessory chain by forming a rectangular tube formed by bending a band-shaped metal in a chain so that one side surface of one rectangular tube passes through a hollow portion of another rectangular tube adjacent thereto. ,
The accessory chain is gripped on both sides of the rectangular cylinder to be compressed, and two side surfaces in a direction orthogonal to the longitudinal direction of the accessory chain of the square cylinder to be compressed protrude in one direction parallel to the longitudinal direction of the accessory chain. The rectangular cylinder to be compressed is compressed in the longitudinal direction of the jewelry chain until it is bent, the jewelry chain is sent a predetermined number of frames, and the compression is repeated, so that almost all the rectangular cylinders of the jewelry chain are stretched in the longitudinal direction of the jewelry chain. Compressing in the direction;
The accessory chain is orthogonal to the longitudinal direction of the chain until the two side surfaces of each rectangular cylinder in the direction parallel to the longitudinal direction of the accessory chain approach each other to such an extent that the hollow portion inside the accessory chain cannot be seen through. Compressing in the direction of
A method for manufacturing a jewelry chain, comprising: A step of forming a clothing accessory chain by forming a rectangular tube formed by bending a band-shaped metal in a chain so that one side surface of one rectangular tube passes through a hollow portion of another rectangular tube adjacent thereto. ,
The accessory chain is gripped on both sides of the rectangular cylinder to be compressed, and two side surfaces in a direction perpendicular to the longitudinal direction of the accessory chain of the square cylinder to be compressed are curved convexly toward the inside of the square cylinder. The square cylinders to be compressed are compressed in the longitudinal direction of the accessory chain, the predetermined number of frames are sent to the accessory chain, and the compression is repeated until almost all of the rectangular cylinders in the accessory chain are moved in the longitudinal direction of the accessory chain. Compressing, and
The accessory chain is orthogonal to the longitudinal direction of the chain until the two side surfaces of each rectangular cylinder in the direction parallel to the longitudinal direction of the accessory chain approach each other to such an extent that the hollow portion inside the accessory chain cannot be seen through. Compressing in the direction of
A method for manufacturing a jewelry chain, comprising:   In the step of compressing the rectangular tube body in the longitudinal direction of the accessory chain, the compressed side portion of the accessory chain among the both sides of the rectangular tube object to be compressed is gripped by the compression receiving mold, and the uncompressed side of the accessory chain is The part is gripped by a compression push mold, the compression push mold grips the rectangular cylinder without slipping, and the compression receiving mold initially grips the square cylinder so that it can slide, and pressure is applied in the longitudinal direction. As the gripping force is increased, the rectangular tube body of a predetermined number of frames is sent to the compression receiving die side in the process in which the compression receiving die increases the gripping force, and then the compression receiving die and the compression pushing die are square tubes. 6. The method of manufacturing a clothing accessory chain according to claim 4, wherein the rectangular cylindrical body to be compressed is compressed and deformed by gripping the body without slipping.   7. The method according to claim 4, further comprising a step of grinding at least a part of an outer peripheral surface of each of the square cylindrical bodies so that a plane is formed along a longitudinal direction of the accessory chain. Method for manufacturing jewelry chains.

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