JP2659509B2 - Chain for accessories, automatic knitting machine thereof, and automatic knitting method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain for accessories, an automatic knitting machine therefor, and an automatic knitting method therefor, comprising a flat lower surface and a thick portion provided at a desired thickness in one direction perpendicular to the lower surface. This is optimal for automatically knitting a chain in which one piece of link shape is formed to be substantially elliptical in front view using a metal wire material such as an instep round material.

[0002]

2. Description of the Related Art Conventionally, an apparatus and a method for automatically knitting a jewelry chain used for a hanger or a band attached to a necklace, bracelet or bag are shown in FIGS. 28 to 33. Some are manufactured using a metal wire having a circular cross section (hereinafter simply referred to as a round wire). The shape of the front is almost elliptical 1
The case where the link of the pieces is connected or the case where the Kihei chain is automatically knitted will be described as an example. As shown in FIGS. 28 and 29, a spiral groove 40a having a substantially elliptical cross section is provided on the outer periphery,
When a round wire 42 made of a metal wire is wound around the spiral groove 40a of the transfer rod 40 rotatably housed in a cylindrical guide case 41 and the transfer rod 40 is rotated, the round wire 4
2 is sent out from the tip of the guide case 41 to draw a spiral.

Immediately before the round wire 42 is spirally sent from the transfer rod 40 while being spirally formed, a pair of right and left gripping parts 43a, 43b of the pincer 43 is formed immediately before the winding 42A having a substantially elliptical front surface is formed. Are closed so as to be substantially opposed to each other in the front-rear direction and clamp the one turn 42A of the round wire 42 (see FIG. 30). Next, the cutter 44 makes the one turn 42A of the round wire 42.
Is cut in the front-rear direction (see FIGS. 29 and 32).

Then, the pincer 43 moves while holding the cut round wire 42 as a workpiece, and a pair of left and right jaw parts 45a and 45b of the clamp 45 are cut to form a substantially V-shaped side surface. The right and left abutting ends 42a and 42b of one turn 42A of the round wire 42 are clamped from the front-rear direction against the resilient force so that their axes are substantially aligned. Thus, a link R ′ having a substantially elliptical front surface is formed (the imaginary line in FIG. 30,
See FIG. 31).

At this time, since the rotation of the transfer rod 40 is continued, the tip of the subsequent round wire 42 sent out as shown by the imaginary line in FIG. 30 is already clamped by the clamp 45 in the above process. By being inserted into one turn 42A of the round wire 42 as a work to be processed, the link R 'of one preceding frame of the chain and the link R' of one subsequent frame of the chain are interconnected. Moreover, as one spiral 42A is sent out from the transfer rod 40, the round wire 42 again draws a substantially elliptical front surface in preparation for the next cycle.

When the Kihei chain is formed, the clamp 45 clamps the lower part of the round wire 42 with the left and right abutting ends 42a and 42b located above the one turn 42A of the round wire 42. The pincer 43 alternates approximately 9 clockwise or counterclockwise around the vertical axis.
By rotating by 0 °, one of the round wires 42 as a workpiece is
Process the halves 42A ₁ or lower half portion 42A ₂ on the winding 42A give twist is formed by being added to the process (see Figure 33).

Thereafter, the right and left jaw parts 45a and 45b of the clamp 45 are opened, and the clamping of the round wire 42 is released. Moreover, the left and right holding parts 43a of the pincer 43,
By opening 43b, the pinching of the round wire 42 is released, and then the pincer 43 reverses by 90 ° to return to the previous position. By repeating the above operation, one frame of the link R 'is sequentially connected, and the chain is automatically knitted.

Further, a link R 'for each frame of the chain
Kihei chains and the like are manufactured by brazing the butting ends 42a, 42a of each other.

In the above process, the lower part of one turn 42A of the round wire 42 is clamped by the pincer 43 and
If the upper omit the step for imparting a twist to the halves 42A ₁ or lower half portion 42A ₂ on the round wire 42 by pinching by the clamp 45, the first link R '
It is possible to automatically knit a chain whose piece has a substantially elliptical shape in front.

Conventionally, as a metal wire material other than the round wire 42 having a substantially circular cross section, as shown in FIG. 34, for example, a flat lower surface portion 1'a is orthogonal to the lower surface portion 1'a. A thick portion 1'b having a desired thickness provided at a substantially middle height in one side direction, and a thin portion 1'c having a smaller thickness than the thick portion 1'b on a side edge of the thick portion 1'b. There was a round wire K '(hereinafter simply referred to as a round wire in the present specification) having a substantially arc-shaped cross section.

[0011]

The conventional method shown in FIGS. 28 to 33 for manufacturing a chain or a Kihei chain in which front elliptical links are connected using a round wire 42 made of a metal wire is used. The cutter 44 moves back and forth with respect to one turn 42A of the spiral round wire 42 sent from the sending rod 40, thereby cutting the round wire 42 as a workpiece. The cut end surface at 42b is cut into a front ellipse rather than a front perfect circle according to the degree of opening (spiral gradient) of the spiral having a substantially V-shaped side surface.

As shown in FIG. 30, a pair of abutting ends 42a, 42b of a single winding 42A having a substantially V-shaped side surface are formed into a spiral elastic force by a pair of jaw parts 45a, 45b of a clamp 45. At this time, the cut end faces do not adhere to each other because the cut end faces are roughened by cutting with a cutter, and the cut end faces formed into a front elliptical shape when cutting are formed. Even at the time of abutment, the outer peripheral surfaces are joined in a displaced state even if the axes are substantially aligned with each other. This displacement is within the allowable range without any inconvenience to the naked eye, but when the right and left abutting ends 42a and 42b are brazed to each other, the finish of the brazed portion becomes unsightly in appearance. In order to prevent this, unnecessary polishing work and removal work of the brazed part were required, the number of processes increased, and production was troublesome and costly.

Further, when a chain or a Kihei chain in which front elliptical links R 'are connected to each other by using the above-mentioned machine by a round wire 42 having a substantially circular cross section and adopting the above-described method, a round wire is used. When the 42 itself is manufactured using a noble metal such as gold, platinum, silver or the like or an alloy thereof, the weight increases and the price becomes expensive.

The right and left abutting ends 42a, 4a of the round wire 42
In order to join 2b in close contact with no deviation,
The jaw parts 45a, 45b of the clamp 45 corresponding to the degree of opening of the spiral round wire 42 delivered from the delivery rod 40
It is necessary to set the installation direction of the cutter 44 with respect to the round wire 42 in consideration of the distance of the pressing movement caused by the pressure.

That is, it is necessary to strictly make the production accuracy of the automatic knitting machine itself for the accessory chain and the assembly accuracy of the parts.

By the way, a chain or a Kihei chain in which front substantially elliptical links R 'are connected by using the conventional automatic knitting machine as shown in FIG. It cannot be knitted. This is because when a round wire K 'as shown in FIG. 34 is wound around a spiral groove 40a provided on the outer periphery of the delivery rod 40 and the delivery rod 40 is rotated to be delivered spirally to the outside, Line K '
The outer peripheral side having a substantially arc-shaped cross section has a small contact area with the cylindrical guide case 41 similarly to the round wire 42, so that it can easily slide, but the flat lower surface portion 1'a on the inner peripheral side On the other hand, the contact area increases and the coefficient of friction increases. As a result, even if the delivery rod 40 rotates in the guide case 41, the round wire K 'is twisted in the spiral groove 40a and cannot be delivered to the outside smoothly. When using the conventional automatic knitting machine described above to manufacture a Kihei chain or a link having a substantially elliptical cross-section at the instep K ', cut with a cutter in a direction crossing the thickness direction of the instep. As a result, the abutting end of the workpiece formed by the instep K 'is crushed in the width direction. For this reason, a constriction occurs at the abutting end of the butted link at the time of joining, and a link is formed in which the joining state is conspicuous in appearance. Therefore, it was not suitable for practical use in automatically knitting a chain by connecting such links.

Accordingly, the present invention provides a metal wire formed by a flat lower surface portion and a thick portion having a desired thickness in one direction orthogonal to the lower surface portion, for example, a round wire. , Links can be automatically knitted in front of a substantially elliptical shape, and the volume is gorgeous because of the apparent volume feeling, but it is lightweight, and the right and left abutment of one link It is an object of the present invention to ensure that the edges are in close contact with each other and that the brazing is beautiful on the finished surface, that the appearance is good, that the production and the work can be performed without any trouble.

[0018]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a flat lower surface formed of a metal or an alloy.
A substantially middle and high thickness portion provided at a desired thickness in one direction orthogonal to the lower surface portion, and a thin portion thinner than the thick portion at a side edge of the thick portion, The left and right abutting ends of the metal wire having a height obtained by multiplying the length of the thick part by 0.3 to 0.6 to the length of the lower part are 50 to 90 degrees. To the cutting angle
Cut the flat lower surface side to the inner circumference side
Are arranged on the outer peripheral side and joined to form a link having a substantially elliptical front surface.

The present invention also provides a feed mechanism for intermittently moving a metal wire having a flat lower surface and a substantially middle thick portion by a predetermined length, and a metal wire having a predetermined length as a workpiece. Each time the cutting angle of 50 ° ~ 90 °, the axis of the metal wire rod
A cutter for cutting by the intersection to the long direction, and the metal wire member center core part movably and vertically movably provided the cross section ellipse in a direction intersecting the moving direction of intermediate core parts And a hammer component which is provided above and below the clamp so as to be vertically movable.

The present invention also provides a step of intermittently moving a metal wire having a flat lower surface and a substantially thick portion at an intermediate height by a predetermined length, and cutting the metal wire by a predetermined length. Forming a workpiece, and a step of advancing the core part having a substantially elliptical cross section from a direction crossing the moving direction of the workpiece,
Next, the pair of jaw parts on the left and right sides of the clamp in which the core part descends are closed with respect to the core part, so that the workpiece is formed into a substantially frontal elliptical shape corresponding to the curvature of the outer periphery of the core part. Pressing, bending, hitting the abutting ends of the workpiece with each other with a hammer component to abut, and then withdrawing the workpiece by retracting the core component. That means was adopted.

Further, the present invention provides a step of intermittently moving a metal filament having a flat lower surface and a substantially middle thick portion by a predetermined length, cutting the metal filament by a predetermined length, and covering the metal filament with a predetermined length. Forming a workpiece, and then closing the pair of left and right jaw parts of the clamp in which the core part descends with respect to the core part so as to correspond to the curvature of the outer periphery of the core part. Pressurizing and bending the front workpiece into a substantially elliptical shape, a step of hitting the abutting ends of the workpiece with each other by a hammer component to abut the workpiece, and then retreating the center core component to cause the workpiece to retract. And a pair of left and right jaw parts of the clamp so that the subsequent metal wire material to be intermittently moved can be inserted into the front substantially elliptical workpiece being manufactured. Is about 90 ° around the vertical axis every cycle while holding the workpiece Employing means that consists of the step of performing a lifting operation while rolling or reversed alternately.

[0022]

By opening and closing a pair of left and right jaw parts around a core part having a substantially elliptical cross section, a metal wire having a flat lower surface part and a thick part cut into a predetermined length is formed. Pressing and bending a substantially elliptical link and hitting the abutting end with a hammer part to abut the link and automatically inserting a subsequent metal wire into the link to automatically chain the link Is knitted.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the automatic knitting machine of the present invention and a chain for accessories which are automatically knitted therefrom will be described below with reference to FIGS. Reference numeral 1 denotes a metal wire material. The metal wire material 1 is formed of a metal or an alloy thereof, and is disposed on a flat lower surface portion 1a and in one side direction orthogonal to the lower surface portion 1a, for example, in a substantially upper center. A thick portion 1b of approximately middle height provided at a desired thickness, and the thick portions 1b on the left and right side edges of the thick portion 1b.
Although it is formed by the thin portions 1c, 1c having a smaller thickness, in this embodiment, as a representative example, a round wire K having a substantially circular arc cross section is used.

The indented round wire K is formed, for example, by drawing a round wire 42 by a die, and has a cross-sectional dimension of a case where a series of chains C are formed by connecting links R having a substantially elliptical front surface. in appearance to sufficiently exhibit the voluminous lightweight spite, height h ₁ of the thick portion 1b so as to provide Goujasu feel the undersurface portion 1a to the length l ₁
A length multiplied by 0.3 to 0.6 is optimal. Specifically, for example, in this embodiment, the length l ₁ of the lower surface portion 1a is about 1.00 mm, and the height h _{1 of the} thick portion 1b.
Use the one of about 0.40mm. And in size in this embodiment one frame of the front substantially elliptical link R, it is about the long axis dimension L ₁ of the inner diameter of 2.35 mm, a minor axis of the inner diameter dimension L
₂ forms about 1.50 mm.

Reference numeral 2 denotes a feed mechanism for intermittently moving the metal wire 1 in a substantially horizontal direction by a predetermined length L. The feed mechanism 2 is a motor of a motor M provided on one side of the machine frame 3. A drum 4 on which the metal wire 1 is wound by being mounted on the shaft m, and a guide receiving portion 5 provided on a front surface of the machine frame 3 in a tangential line S direction of the drum 4. You.

The supporting the guide pedestal portion 5 which is holding hole 5a ₁ for holding movably said metal wire member 1 that comes is intermittently moved by a predetermined length L by one intermittently from the drum 4 is provided It is formed from a portion 5a and a receiving plate portion 5b provided near the outlet of the support portion 5a. And the guide receiving portion 5
A guide support plate 6 having an introduction hole 6a through which the metal filament material 1 wound around the drum 4 is inserted and provided on one side so as to face the drum 4; 6, a roller 7 for removing distortion of the metal wire 1 conducted from the introduction hole 6a and a habit removing part 9 having a guide groove 8 are attached.

Reference numeral 10 denotes a cutter.
Is provided above the receiving plate portion 5b so as to be able to move up and down so as to intersect in the axial direction of the metal wire 1 so that the metal wire 1 can be used as a workpiece for forming one link R. it is to cut the length L _1. In addition, when the left and right abutting ends t, t of the workpiece T form a single link R having a substantially elliptical front surface, the leading edge 10 of the link R is completely adhered.
a is formed at an angle θ of 50 ° to 90 °. As a driving mechanism for making the cutter 10 vertically movably, and the cam shaft 11 to be rotatable by a driving force of the motor M _1, a rolling roller 13 in contact with cam 12 which is So設the cam shaft 11 Attached to the lower end, and the middle part is spindle 1.
4, it can be raised and lowered by being attached to the machine frame 3, and is further formed by an arm 16 to which the cutter 10 is mounted via an adjustment screw 15 on the distal end side.

Reference numeral 17 denotes the receiving plate portion 5b of the guide receiving portion 5.
Any intervals spaced M is a support plate portion provided so as to face the ends of the metal wire member 1 the supporting plate 17 is cut to a predetermined length L ₁ by the cutter 10 to be substantially the same height as the A groove 17a into which the distal end of the metal wire 1 is inserted is provided at the opposite end in order to support the support in cooperation with the receiving plate 5b.

Reference numeral 18 denotes a core part.
Is formed in a substantially elliptical cross section having a concave portion 18a below, and intersects between the guide receiving portion 5 and the support plate portion 11 with respect to the moving direction A of the metal wire member 11 as the workpiece T. It is provided so as to be able to advance and retreat in a direction (the front-back direction in the figure) and to be able to move up and down.

Reference numeral 19 denotes the guide receiving portion 5 and the support plate portion 1.
The clamp 19 is provided at a lower portion of the lower part 7. The clamp 19 has a predetermined length L by allowing a pair of left and right jaw parts 19 a and 19 b to open and close with respect to the core part 18.
_{1. The} metal wire 1 cut by a cutter 10
The workpiece T is pressurized to a curvature substantially corresponding to the outer peripheral surface of the core component 18 and bent into a substantially elliptical front surface. 19a ₁ , 1
9b ₁ is a concave surface portion which is formed with a substantially corresponding curvature on an outer peripheral surface in said core part 18 right and left pair of said jaw parts 19a, on the inner side of 19b, the concave surface portion 19a _1,
19b ₁ has no front substantially oval halved.

As shown in FIGS. 2 and 12, the lifting mechanism for the pair of left and right jaw parts 19a, 19b is provided on support plates 3b, 3b fixed to a holding portion 3a provided on the front surface of the machine frame 3.
It is pivotally supported by a shaft 20 and 20, the inclined surface portion 19a _2, 19b ₂ is provided on its inner bottom. And provided the jaw parts 19a, the wedge 21 having an inclined surface portion 21a in contact with the inclined surface portion 19a _2, 19b ₂ and 19b on the upper end,
The pair of left and right jaw parts 19a and 19b are pivoted about the shafts 20 and 20 to be opened and closed by the vertical movement of the piston 22 accommodated in the holding portion 3a. The up and down movement of the piston 22 changes the rotation of the camshaft 11 to a cam,
This is performed by converting the movement into a linear up and down movement through the link part 23.

The clamp 19 is rotated forward or backward by about 90 ° about a vertical axis every cycle in which one pair of left and right jaw parts 19a and 19b manufactures one link R while clamping the workpiece T. The subsequent metal wire 1 that is intermittently moved by the feed mechanism 2 by ascending and rising alternately is inserted into the substantially elliptical workpiece T being manufactured (see FIGS. 8 and 9).

As shown in FIG. 2, a mechanism for the clamp 19 to rotate forward or backward by approximately 90 ° is similarly provided by a rear end slidingly contacting a cam (not shown) mounted on the camshaft 11. One end is fixed by a shaft 25 at the tip of a drive shaft 24 that reciprocates in the direction, and the other end can swing the intermediate part of a link component 26 restraining the jaw components 19a and 19b by the shaft 27 to the holding portion 3a. It is formed by being fixed to the shaft. When the drive shaft 24 moves in the front-rear direction, the link component 26 swings about the shaft 27, thereby causing the jaw components 19a and 19b to rotate forward or backward by approximately 90 ° as a whole.

Numeral 28 denotes a hammer component which is provided above and below the core component 18 so as to be vertically movable. The hammer component 28 causes the left and right abutting ends t, t of the workpiece T to be moved a plurality of times, for example, twice. By being repeatedly hit, the abutting ends t, t are abutted in a state of being completely adhered (see FIGS. 2 and 7). The hammer part 28 can be moved up and down linearly via a link with a cam on which the camshaft 11 is mounted.

One embodiment of the automatic chain knitting machine according to the present invention has the above-mentioned configuration, and its operation will be described below together with the automatic chain knitting method. First, as a first step, a metal wire member 1 composed of a rounded wire K having a substantially arc-shaped cross section composed of a flat lower surface portion 1a and a substantially middle-high thickness portion 1b provided in a direction crossing the lower surface portion 1a is provided. It is intermittently moved by a predetermined length L by the feed mechanism 2 (see FIGS. 1, 2, and 3). When the motor M is driven, the drum 4 mounted on the motor shaft m rotates, so that the metal wire 1 wound around the drum 4 is intermittently moved in the tangential direction S of the drum 4.

At this time, the metal wire 1 sent out from the drum 4 is positioned in the transfer direction by passing through the introduction hole 6a formed in the guide support plate 6, and the metal wire 1 is moved.
The rattle of the drum 4 is removed while the roller is provided in the guide receiving portion 5 and linearly guided into the guide groove portion 8. go is inserted into the provided holding hole 5a ₁ (see FIG. 2). The tip of the metal wire 1 (the right abutment end t in the figure) is inserted into the groove 17a of the support plate 17 to support one end of the workpiece T. The end is supported by the receiving plate portion 5b of the guide receiving portion 5, whereby the workpiece T is supported at both ends (see FIGS. 2 and 3).

[0037] Then the cutter 10 is the workpiece T as the metal wire members 1 a predetermined length L ₁ by one cut to form a link R of one frame by lowering the workpiece T as the second step (FIG. 3). In this case, lifting the cutter 10 rotates the cam shaft 11 by driving the motor M _1,
When the cam 12 is rotated, the rotation is performed by raising and lowering an arm 16 about a support shaft 14 via a rolling contact roller 13 that comes into contact with the cam 12 (see FIGS. 2 and 11).

Then, as a third step, the core part 18 descends to the central bisector N of the workpiece T, and a pressing force is applied from above, and the workpiece T has its left and right lower surfaces left and right of the clamp 19. The work piece T is sandwiched between the pair of jaw parts 19a and 19b, and a pressing force is applied from below.
Is folded in two so as to be wound around the core component 18 from below (see FIG. 5).

As a fourth step, when the camshaft 11 rotates by driving the motor M ₁ and the cam (not shown) rotates, the piston 22 descends via the link part 23. secured to the outer periphery of the inclined surface portion 21a of which wedge 21 is a pair of right and left jaw parts 19a, the inclined surface portion 19a ₂ provided on the lower surface of the 19b, 19b
₂ are pressed against each other, so that a pair of right and left jaw parts 19a, 19
The tip b rotates and closes in the opposite direction about the shafts 20 and 20 (see FIGS. 2 and 12).

The concave part 19 corresponding to the curvature of the outer periphery of the core part 18 thus formed to have a substantially elliptical cross section.
a pair of left and right jaw parts 1 having a ₁ and 19b ₁ inside
Since the workpieces 9a and 19b are closed, the workpiece T has a middle core part 18 having a substantially elliptical cross section and a pair of right and left jaw parts 19a ₁ and 19a.
It is bent in a front substantially elliptical by pressurized from inside and outside by the b _1. At this time, the right and left abutment ends t, t of the workpiece T are located above the middle core part 18 having a substantially elliptical cross section and have not yet been abutted (see FIG. 6).

Then, as a fifth step, the hammer part 28 is moved to the right and left abutting ends t, t of the workpiece T facing from between the pair of left and right jaw parts 19a, 19b of the closed clamp 19. The impact is performed by repeatedly descending a plurality of times, for example, about two times, and the abutting ends t, t are abutted (see FIG. 7). The hammer part 28 is the camshaft 11
The cam can be moved up and down via a cam or the like (not shown) that slides on one end of the cam. At this time, the hammer component 28 moves up and down a plurality of times, for example, about two times, against the abutting ends t, t of the workpiece T, and repeats the striking. This is because the joint ends t and t are completely aligned with each other with their axes aligned. Moreover, the abutting ends t, t of the workpiece T are located above the intersection of the cutter 10 having the tip blade portion 10a formed at an angle θ of 50 ° to 90 ° in the axial direction of the metal wire 1. Is cut into a smooth cut end face by descending from
When the workpiece T is pressurized and formed into a link R having a substantially elliptical front surface, the right and left abutting ends t, t are completely adhered by being hit with a hammer part 28. (See FIGS. 4 and 7). At this time, since the hammer component 28 strikes the workpiece T formed by the round instep K from directly above the thickest part 1b that is structurally strongest, the abutting ends t, t of the workpiece T are hit. Adheres with a beautiful finish without being crushed and without causing distortion in the width direction.

As a sixth step, the center part 18 is pressed from one link R of the front substantially elliptical shape which is pressed and molded into a substantially elliptical front.
Is withdrawn by retreating.

Thereafter, as a seventh step, the pair of jaw parts 19a and 19b of the right and left sides of the clamp 19 rotate forwardly by about 90 ° about the vertical axis every cycle while holding the workpiece T being manufactured (see FIG. By performing the ascending operation while alternately rotating (clockwise rotation) or inverting (counterclockwise rotation), the workpiece T is intermittently moved by the feed mechanism 2 into the front elliptical workpiece T being manufactured. Since the succeeding metal wire 1 is inserted, one link R having a substantially elliptical front face is connected to the subsequent workpiece T (see FIGS. 8 to 10).

The chain C is automatically knitted by performing the above operations continuously.

Thereafter, each link R forming the chain C
The work for brazing the right and left abutting ends t, t in the same manner as in the prior art is the same, but the left and right abutting ends t, t of each link R are cut end faces with their axes substantially aligned. Since there is no gap between them, they are completely adhered to each other, so that brazing can be performed firmly and firmly. In addition, since the brazed portion does not have any swelling particularly on the outer peripheral surface and does not require any post-processing such as polishing removal work, a beautiful finish can be obtained without troublesome production.

By the way, a pair of jaw parts 19a, 19a,
The reason why the lifting and lowering operation is performed while the normal rotation or the reverse rotation is alternately performed approximately every 90 ° is that the connection state of the links R, which are connected in the vertical direction, is alternately averaged without twisting habit and shared. This is to prevent a twist habit from occurring in one chain C. Even if the chains C are entangled, the entanglement is naturally released by its own weight. In addition, the link R is formed in a substantially elliptical front surface, and furthermore, the flat lower surface portion 1a is located on the inner peripheral side thereof, so that the links R, R have a large contact area with each other, and do not roll carelessly. In addition, the abutting ends t, t in the joined state of the link R are always disposed above or below as the major axis direction of the elliptical shape, and the link R to be connected to each other is hidden. The ends t and t do not appear outside. Therefore, a chain C excellent in design can be manufactured without any appearance irregularities such as unsightly appearance of the joint portion.

The chain C thus manufactured is
As shown in FIG. 1, the length l ₁ of the lower surface portion 1a of the metal wire ₁ is 1.00 mm, and the height h _{1 of the} middle thick portion 1b is 0.40.
Since one link R formed by using a rounded wire K having an arcuate cross section of about mm is manufactured by automatic knitting, the chain C is formed by using a round wire 42 having a substantially circular cross section. Compared to the conventional product, the volume as viewed from the front (in the direction of the end face) is reduced and the weight is reduced. On the other hand, the volume as viewed from the side has little change, so that the appearance is voluminous and gorgeous. Incidentally, the weight of one piece of the link R manufactured in the present embodiment is about 0.037 (g) when 18K is used, has substantially the same diameter, and has substantially the same shape as the round wire 42 of the same material. The weight of the prototype when making the link of 0.093 (g)
It is lighter than it is.

By the way in the production of link R of the front substantially elliptical one frame as shown in FIG. 15, the cross-section so as to exert a voluminous for the minor axis dimension L ₂ in the long-axis dimension L ₁ and the inner diameter of an inner diameter Of a substantially arcuate instep K,
Table 1 is obtained as a result of conducting a test on the relationship between the dimension l ₁ of the lower surface portion 1a and the height h ₁ of the thick portion 1b.

[0049]

[Table 1] From Table 1 above, for the metal wire 1, the thick portion 1 of the Komaru wire K
The height h ₁ of b is a value obtained by multiplying 0.4 to the length of the lower surface portion 1a, but is illustrative. As a preferable example for sufficiently exhibiting a sense of volume while being lightweight, the lower surface portion 1a
Multiplied by 0.3 to 0.6.

Further, the length l ₁ of the lower surface portion 1a of the instep K of Table ₁ is 0.60 (mm) and 0.80 (m
m), 1.00 (mm), 1.20 (mm), 1.40 (mm), 1.60 (mm), 1.80 (m
m) and 2.00 (mm) of the tip blade 10a of the cutter 10 are 73 °, 74 °, 75 °, 77 °, 79 °, 81 °, and 83 °, respectively.
° and 85 °. In the case of cutting the round wire K with the cutter 10 having the tip blade portion 10a having such an angle, and forming one link R having a substantially elliptical front surface using the automatic knitting machine described above as shown in FIG. And the right and left abutting ends t,
When the t is hit with the hammer 28, the cut ends are securely brought into close contact with each other in a state where their axes are substantially aligned with each other, without any displacement.

FIGS. 14 and 15 show a second embodiment of the link R 'formed by the instep K of the present invention. The link R' of this embodiment is the same as that of the above embodiment. It is formed in a front oblong shape compared to the link R.
Specifically, in this embodiment, the size of one frame of the link R is, for example, the major axis dimension L' _{1 of the} outer diameter is 5.00 mm.
The minor axis dimension L' _{2 of} the outer diameter is formed to be about 2.00 mm, and the major axis dimension L' ₁ is a value obtained by multiplying the minor axis dimension L' ₂ by 2.5. It does not do.
In addition, the cross-sectional shape of the round wire K of the metal wire material 1 is the same as that of the above embodiment. The automatic knitting of the chain C using the link R 'is performed by forming the outer peripheral curved surface of the core part 18 into an elliptical cross section in the apparatus shown in FIGS. The device is characterized in that concave curved surface portions 19a ₁ and 19b ₁ corresponding to the outer peripheral curved surface are formed inside a pair of jaw components 19a and 19b arranged to be openable and closable right and left around the center core component 18. And different. The link R 'is formed by the same knitting method as described above, and the chain C is automatically knitted.

In the above embodiment, the metal wire 1
However, although a single link R having a substantially elliptical front face is automatically knitted by using a round wire K having a substantially arc-shaped cross section, the present invention is not limited to this. A flat lower surface 1a, a substantially middle and high thickness portion 1b provided at a desired thickness in one direction perpendicular to the lower surface 1a, and a side edge of the thick portion 1b 16 having a thin section 1c having a small thickness, for example, as shown in FIG.
As shown in FIG. 17, an instep round line having an arcuate cross section of a slightly middle height is formed, and as shown in FIG.
A continuous chevron, as shown in FIG.
A has a three-continuous chevron shape with three consecutive A's, and as shown in FIG. 19, the lower surface 1a has an arc-shaped flat surface 1a 'which is almost linear.
20 and the hollowed-out K-shaped wire K as shown in FIG. 20, the one having a substantially trapezoidal cross-section as shown in FIG. 21, and the cross-section as shown in FIG. 22. The metal wire 1 may have a polygonal shape, or may have a saw-toothed cross section as shown in FIG.

In addition, as the metal wire material 1 used in the above description, a noble metal, a non-metal, or an alloy thereof is used. The wire K is used. In addition, as shown in FIG. 24, a metal film 30 made of a different material is coated on the flat lower surface 1a of the metal wire material 1 by appropriate means such as plating, vapor deposition, sputtering, and high frequency welding. FIG. 25 shows an arc head of a rounded wire K having a substantially circular cross section as shown in FIG. 25, or a substantially trapezoidal cross section as shown in FIG. As shown in FIG. 27, by using one of the three continuous chevron-shaped insteps 1A different from the adjacent one, the completed chain C is made of different metals such as a link R of a combination of gold and platinum. Linked The chain C can be made automatic knitting becomes more Goujasu by to have a design change.

In the above embodiment, the core part 18
The cross-sectional shape of the clamp 19 is substantially elliptical.
A pair of left and right of the jaw parts 19a, on the inner surface of 19b of the front substantially elliptical by forming a substantially concave curved surface portion 19a ₁ of the corresponding cross section elliptical, 19b ₁ to the curvature of the outer peripheral surface of the central core part 18 Although the case where the link R is formed and the chain C is automatically knitted is described as a representative example, the concave curved surface portions 19a ₁ , 19a ₁ , 19b of the core part 18 and the jaw parts 19a, 19b are described.
Sectional shape of 19b ₁ is not limited to this, it may be formed in a round, for example.

[0055]

As described above, the present invention relates to a metal wire material formed by a flat lower surface portion and a thick portion having a desired thickness in one direction perpendicular to the lower surface portion, for example, a round wire. the using, can be made automatically knitted by continuously connected links front substantially elliptical. Also, while being lightweight, it has a voluminous feel and becomes gorgeous, and furthermore , the axes of the right and left abutment ends of one link are substantially aligned with each other.
Completely abutting phase without any deviation or distortion on the outer peripheral surface of the link
Polishing work and removal of unwanted low with part with well certainly can be carried out appearance at each other are in close contact low with a beautiful finish surface
Post-processing such as leaving work is not required , and labor and cost are not required.

[Brief description of the drawings]

FIG. 1 is a cutaway slope view showing an example of an instep wire as a metal wire in the case of manufacturing an accessory chain of the present invention.

FIG. 2 is a perspective view showing an example of the automatic knitting machine for a chain for accessories according to the present invention.

FIG. 3 is a front view showing a state in which a metal wire is delivered by a predetermined length as a first step of the knitting method of the present invention.

FIG. 4 is a front view of a state in which the metal wire is cut into a predetermined length as a second step.

FIG. 5 is a front view showing a state in which a core component is lowered to a workpiece as a metal wire as a third step.

FIG. 6 is a front view showing a state where the workpiece is pressurized and bent by a clamp centering on a core component as a fourth step.

FIG. 7 is a front view of hitting an abutting end of the workpiece with a hammer in a state where the workpiece is clamped by a clamp as a fifth step.

FIG. 8 is a front view showing that the clamp is rotated by approximately 90 ° and rises while holding a link formed of a workpiece by a clamp;

FIG. 9 is a front view showing a state where a subsequent workpiece is inserted into the link.

FIG. 10 is a front view showing a state where the clamp descends while rotating by approximately 90 °.

FIG. 11 is an explanatory side view showing an example of a lifting mechanism of the cutter according to the present invention.

FIG. 12 is an explanatory side view showing an example of a clamp opening / closing mechanism of the present invention.

FIG. 13 is a front view showing an example of a link knitted by the automatic knitting machine of the present invention.

FIG. 14 is a front view showing another example of a link knitted by the automatic knitting machine of the present invention.

FIG. 15 is a sectional view taken along the line AA of FIG. 14;

FIG. 16 is a cross-sectional view showing another example of an instep wire as a metal wire.

FIG. 17 is a cross-sectional view showing a second modification of the metal wire.

FIG. 18 is a sectional view showing a third modified example of the metal wire.

FIG. 19 is a cross-sectional view showing a fourth modification of the metal wire.

FIG. 20 is a cross-sectional view showing a fifth modification of the metal wire.

FIG. 21 is a cross-sectional view showing a sixth modification of the metal wire.

FIG. 22 is a cross-sectional view showing a seventh modification of the metal wire.

FIG. 23 is a sectional view showing an eighth modified example of the metal wire.

FIG. 24 is a sectional view showing a ninth modified example of the metal wire.

FIG. 25 is a cross-sectional view showing a tenth modification of the metal wire.

FIG. 26 is a cross-sectional view showing an eleventh modification of the metal wire.

FIG. 27 is a cross-sectional view showing a twelfth modified example of the metal wire.

FIG. 28 is a side view showing a conventional automatic knitting machine of this type.

FIG. 29 is an enlarged sectional view of a main part of the same.

FIG. 30 is a side view showing a state in which one turn of a spiral metal wire made of a round wire after cutting is cut and held by a pincer.

FIG. 31 is a front view similarly seen from the direction of arrows BB in FIG. 30.

FIG. 32 is an explanatory plan view showing a state where one spiral spiral of the round wire is cut by a cutter.

FIG. 33 is a front view showing a step of twisting a link when the Kihei chain is manufactured.

FIG. 34 is a cutaway slope view showing a conventional instep line.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Metal wire material 1a Lower surface part 1b Thick part 1c Thin part 2 Feeding mechanism 10 Cutter 10a Tip blade part 18 Core part 19 Clamp 19a Jaw part 19b Jaw part 19a ₁ Concave part 19b ₂ Concave part 28 Hammer part h ₁ height K Koumaru line l ₁ length

Claims (19)

(57) [Claims] 1. A flat lower surface formed of a metal or an alloy, a substantially middle-high thickness portion provided at a desired thickness in one direction orthogonal to the lower surface, and a side edge of the thick portion. Has a thin portion thinner than the thick portion, and the height of the thick portion is obtained by multiplying the length of the lower surface by 0.3 to 0.6.
The abutting ends of the left and right metal interface member to be 50 ° to 90 °
Cut at the cutting angle and place a flat lower surface on the inner peripheral side.
A chain for accessories, which is formed into a substantially elliptical front link by arranging and joining the thick portions on the outer peripheral side . 2. The accessory chain according to claim 1, wherein the metal filament is a round wire having a substantially circular cross section. 3. The accessory chain according to claim 1, wherein the metal wire is formed in a continuous chevron shape having a plurality of insteps. 4. The accessory chain according to claim 1, wherein the metal wire material is formed as a round wire having a lower surface portion formed in a substantially circular arc shape. 5. The accessory chain according to claim 1, wherein the metal filament is a hollow round member formed in a hollow shape. 6. The accessory chain according to claim 1, wherein the metal wire is formed to have a substantially trapezoidal cross section. 7. The accessory chain according to claim 1, wherein the metal wire is formed in a polygonal cross section. 8. The chain according to claim 1, wherein the metal wire is formed in a saw-tooth shape in cross section. 9. The accessory chain according to claim 1, wherein the metal wire is formed of a noble metal or an alloy thereof. 10. The accessory chain according to claim 1, wherein the metal wire is formed of a base metal or an alloy thereof. 11. The accessory according to claim 1, wherein a metal different from the metal wire is applied to the flat lower surface or the thick head portion of the metal wire. For chains. 12. The metal wire according to claim 1, wherein any one of a plurality of insteps forming a continuous chevron is formed of a different metal from an adjacent instep. The accessory chain as described. 13. predetermined length at a time 50 and feed mechanism for the metal wire members predetermined length at a time intermittently moving the metal line material as a workpiece and a thick portion of the flat lower surface portion substantially mid-high
A cutter that cuts in the axial direction of the metal wire at a cutting angle of ゜ to 90 °, and a metal wire that is provided so as to be able to advance and retreat in a direction crossing the moving direction and to be able to move up and down. Formed from a core part having a substantially elliptical cross section, a clamp provided so as to be openable and closable with respect to the core part, and a hammer part provided above and below the clamp so as to be vertically movable. An automatic chain knitting machine for accessories. 14. The clamp according to claims 1 to 3, the concave surface portion substantially corresponding to the outer peripheral surface in said core part on the inner side of the right-and-left jaw parts is characterized by being formed opposite Automatic knitting machine for jewelry chains. 15. The cutter according to claim 1, wherein the cutter has a tip blade formed at an angle of 50 ° to 90 °.
3. An automatic knitting machine for a chain for accessories according to 3 . 16. The hammer parts, according to a plurality of times, by repeating the vertical movement is bent by striking the abutting ends of the workpiece, according to claim 1 3 characterized in that the abutment Automatic knitting machine for chains for accessories. 17. The clamp as set forth in claim 1, wherein said clamp is adapted to perform an ascending / descending operation while rotating forward or inverting about a vertical axis alternately about a vertical axis every cycle after the jaw component is closed. 3. An automatic knitting machine for a chain for accessories according to 3 . 18. A step of intermittently moving a metal wire material having a flat lower surface portion and a substantially middle height thick portion by a predetermined length;
A step of cutting the metal wire rod into a workpiece by a predetermined length to form a workpiece, and a step of advancing a core component having a substantially elliptical cross section in a direction crossing the moving direction of the workpiece, The pair of left and right jaw parts of the clamp in which the core part descends close to the core part, and the workpiece is pressed into a substantially frontal elliptical shape corresponding to the curvature of the outer periphery of the core part,
A step of bending, a step of hitting and hitting the abutting ends of the workpiece with a hammer component, and a step of retracting the core component and extracting it from the workpiece. Automatic chain knitting method. 19. A step of intermittently moving a metal wire having a flat lower surface and a substantially middle height thick portion by a predetermined length.
A step of cutting the metal wire rod into a workpiece by a predetermined length to form a workpiece, and then closing the pair of left and right jaw parts of the clamp in which the core part descends with respect to the core part; Pressing and bending the workpiece into a substantially elliptical frontal shape corresponding to the curvature of the outer periphery of the core part, and hitting the abutting ends of the workpiece with each other with a hammer part to cause abutment. A step of withdrawing the core component from the workpiece by retracting the core component, and inserting the subsequent metal wire to be intermittently moved into the front substantially elliptical workpiece being manufactured. A pair of left and right jaw parts of the clamp performing a raising operation while alternately rotating forward or backward by about 90 ° about a vertical axis every cycle while clamping the workpiece so as to be possible; Automatic knitting method for jewelry chains consisting of: