CA1251308A - Apparatus for forming a row of coupling elements for slide fastener - Google Patents
Apparatus for forming a row of coupling elements for slide fastenerInfo
- Publication number
- CA1251308A CA1251308A CA000503840A CA503840A CA1251308A CA 1251308 A CA1251308 A CA 1251308A CA 000503840 A CA000503840 A CA 000503840A CA 503840 A CA503840 A CA 503840A CA 1251308 A CA1251308 A CA 1251308A
- Authority
- CA
- Canada
- Prior art keywords
- punch
- eccentric
- outer ring
- row
- die wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
- B29D5/04—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the interlocking members being formed by continuous meander of filamentary material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/814—Zipper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5101—Slide fastener or slide fastener element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53291—Slide fastener
- Y10T29/53304—Means to assemble teeth onto stringer
Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus, for forming a row of slide fastener coupling element, comprises a continuously rotatable die wheel having an annular peripheral groove for receiving a row of coupling element blanks in folded fashion, and a punching unit for forming coupling heads on the blanks in the groove. The punching unit includes a punch, an eccentric drive mechanism for imparting eccentric motion to the punch, and a linkage for regulating the eccentric motion of the punch, the drive mechanism having an outer ring connected at opposite ends to the punch and the linkage. Owing to the combination of the eccentric motion of the outer ring and the motion of the linkage, the punch is moved so as to follow the rotation of the die wheel while the coupling heads are shaped on each stroke of the punch.
An apparatus, for forming a row of slide fastener coupling element, comprises a continuously rotatable die wheel having an annular peripheral groove for receiving a row of coupling element blanks in folded fashion, and a punching unit for forming coupling heads on the blanks in the groove. The punching unit includes a punch, an eccentric drive mechanism for imparting eccentric motion to the punch, and a linkage for regulating the eccentric motion of the punch, the drive mechanism having an outer ring connected at opposite ends to the punch and the linkage. Owing to the combination of the eccentric motion of the outer ring and the motion of the linkage, the punch is moved so as to follow the rotation of the die wheel while the coupling heads are shaped on each stroke of the punch.
Description
~2t,~3~
sACKGRO~ND OF THE INVENTION
The present invention relates generally to the production of slide fasteners, and more particularly to an apparatus for forming a row of coupling elements for slide fasteners on a rotating die wheel.
Prior art and the present invention will be described with reference to the accompany drawings, wherein:
FIG. 1 is a front elevational view of an apparatus for forming a row of zigzag coupling elements according to the present invention;
FIGS. 2A, 3A, 4A and 5A are fragmentary enlarged plan views of a die wheel, illustrating the manner in which a monofilament is progressively shaped into a row of zigzag coupling elements;
FIGS. 2B, 3B, 4B and 5B are cross-sectional views of FIGS. 2A, 3A, 4A and 5A, respectively;
FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 1;
FIGS. 7A through 7D are cross-sectional views taken along an annular peripheral groove of the die wheel, illustrating the movement of a punch;
FIG. 8 (on the sheet of Figure 6) is a fragmentary side elevational view of the zig-zag-shaped monofilament having been folded into successive U shaped coupling element blanks;
~2~3~
Fig. 9 (on the sheet of Figure 6) is a view similar-to FIG. 8, showing a row of eoupling elements each having a eoupling head shaped by the puneh aeeording to the present invention; and FIG. 10 (on the sheet of Figure 6) is a view similar to FIG. 9, shcwing a row of eoupling elements eaeh having an objeetionably deformed coupllny .~eau shaped by a conventicnal punch.
Canadian Patent No. 669,722 and Japanese Patent Laid-Open Publication No. 59-125506 disclose a coupling-element forming apparatus whieh eomprises a heated die wheel having an annular eentral groove in its peripheral surface and a pair of rows of circumferentially staggered pins disposed one row on each side of the groove. In this prior apparatus, a monofilament of thermoplastic synthetic resin is wound around the pins on the peripheral surface of the rotating die wheel, and then it is forced into the groove so as to be folded into a succession of ~-shaped coupling element blanks, and subsequently the successive ~-shaped eoupling elemen-t blanks are shaped into a final shape as their lower turned portions are deformed by a punch linearly movable into the groove. A primary problem with the known apparatus is that beeause the puneh moves linearly, as shown in FIG. 10 of the accompanying drawings, the eoupling heads 9a would be shaped as objectionably flowed to one side, if the die wheel is continuously rotated during the shaping of the coupling heads 9a. This objectionably deformed coupling heads 9a would impede l3~
correct coupling of the resulting coupling elements 12~o In order to avoid such objectionably deformed coupling heads, the die wheel of the known apparatus must be rotated in-termittently as the punch reciprocates into and out of the groove. Because of this intermittent rotation of the die wheel, an adequate rate of production cannot be achieved.
SUMMARY OF THE INVENTION
It is therefore on object of the present invention to provide an apparatus for forming a row of coupling elements for slide fasteners which apparatus has a punching unit capable of shaping coupling heads of a correct for~ while a die wheel is continuously rotated.
According to the present invention, an apparatus, for forming a row of slide fastener coupling element, comprises a continuously rotatable die wheel having an annular peripheral groove for receiving a row of coupling element blanks in folded fashion, and a punching unit for forming coupling heads on the blanks received in the groove. The punching unit includes a punch, an eccentric drive mechanism for imparting eccentric motion -to the punch, and a linkage for regulating the eccentric motion of the punch, the drive mechanism having an outer ring connected at opposite ends to the punch and the linkage. Owing to the combination of the eccentric motion oE the outer ring and the motion of the linkage, the punch is moved so as to follow the rotation oE the die wheel while the coupling 3~
heads are shaped on each stroke of the punch. With this arrangement it is possible to shape the coupling heads with accuracy while the die wheel is continuously ro-tated.
Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structura] embodiment incorporating -the principles of the present invention is shown by way of illustrative example.
~ L~D DESCRIPTIO~
As shown in FIG. 1, an apparatus for forming a row of continuous zigzag coupling elements 12 for slide fasteners comprises a die wheel 1 mounted on a frame 2 for continuous rotation. The die wheel 1 has an annular central groove 5 in its peripheral surface 4, and a pair of rows of circumferentially staggered pins 4, 4 disposed one row each side of the groove 5, as shown in FIGS. 2A and 2B, there being a pair of rows of circumferentially staggered projections 6, 6 on opposite side walls of the groove 5.
The apparatus also includes a winding unit 13 for winging a monofilament 7 of thermoplastic synthe-tic resin alternately around the pins 4 across the central groove 5 in a zigzag form (FIG. 2A), a lifting unit 14 for lifting up the zigzag monofilament 7 away from the pins 4 (FIG.
3B), and a bending unit 15 for forcing the lifted zigzag monofilament 7 into the central groove 5 to form a row of zigzag coupling element blanks 8 having parallel legs 10 interconnected at their lower ends by lower connecting portions (FIGS. 3A and 3B).
3~
The apparatus still also includes a punching unit 20 for deforming each lower connecting portion to form a coupling head 9 having a pair of latera]. projections (FlGS.
4A and 4B), a hammering unit 16 for bending upper end portions of -the parallel legs 10 la-terally outwardly away from each other to form raised connecting portions 11, 11 in-terconnecting adjacent coupling element blanks 8 (FIGS.
5A and 5B), and a discharging unit 17 for removing the thus formed coupling elements 12 from the die wheel 1. The die wheel 1 is heated by a heating unit 18 disposed on the upper side of the die wheel 1 and is cooled by a cooling uni-t 19 disposed on the lower side of the die wheel 1.
The punchi.ng unit 20 is disposed on the rear side of the die wheel 1 (FIG. 1) and includes a punch 25, an eccentric drive mechanism for moving the punch 25, and a linkage 30 for regulating the movement of the punch 25. As shown in FIG. 6, -the eccentric drive mechanism includes an eccentric drive shaft 21 having an axis L2 eccentric to the axis Ll of a driving sha:Et (not numberecl), an eccentri.c adjusting sleeve 22 of a circumferentially increasing thickness mounted on the eccentric drive shaEt 21 and secured -thereto by means of a headless screw 23. An outer ring 24 is ro-tatably moun-ted on the eccentric adjusting sleeve 22 via a bearing 27, and an inner ring oE the bearing 27 is fixedly secured to the eccentric drive shaft 21 by means of a washer 28 and a screw 29 threadedly extending into a free end of the eccen-tric drive shaft 21.
~25~36~
By loosening the screws 23, 29, the eccentric adjusting sleeve 22 can be circumferentially moved about the eccen-tric drive shaft 21 through an angle for adjusting the distance by which the center of -the outer ring 24 deviates from the axis Ll of the unnumbered driving shaft.
The punch 25 is a-ttached by a screw 26 to one end oE
the outer ring 24 so as to face the peripheral surface 3 of the die wheel 1 in registry with the groove 5. As shown in FIG. 1, the linkage 30 includes a first rod 34 extending from the other end of the outer ring 24 remotely from the punch 25, and a second rod 31 pivotally mounted at one end on the frame 2 by means of a pin 32 and pivotally connected at the other end to a free end of the first rod 34. The first and second rods 34, 31 are pivotable, in response to eccentric motion of the outer ring 24 caused by the rota-tion of the eccentric drive shaft 21, for regulating the motion of -the ou-ter ring 24.
FIGS. 7A through 7D illustrate a sequence of movements of -the punch 25 during a single rotation oE the eccentric drive shaf-t 21, showing the manner in which several successive coupling heads 9 are formed on the lower connecting portions of the folcled coupling element blanks 8. Firstly, a punching head oE the punch 25 is disposed midway in the annular central groove 5, as shown in FIG.
7A. Then as the eccentric drive shaft 21 s-tarts rotating to cause eccentric mo-tion, the punch 25 is moved toward the bottom of the groove 5, and at the same time, it is also ~S~
moved in the direction of rotation of the die wheel 21, namely, from -the phantom-line position to the solid-line position in FIG. 7B, thus pressing several lower connecting portions of the folded coupling element blanks 8 against the bottom of the groove 5 to form coupling heads 9.
The formation of -the coupling heads 9 continues as the punch 25 is further moved from the phantom-line position to -the solid-line position in FIG. 7C, following the rotation of the die wheel 1. Finally, the punch 25 is moved gradually away from the bottom of the groove 5, and at the same time, it is also moved in a direction opposite to the rotation of the die wheel 2, from the phantom-line posi-tion to the solid~line position in FIG. 7D. As a result, -the punch 25 returns to the initial position of FIG. 7A and hence a single cycle of movements of the punch 25 has been completed.
Thus, owing to -the combination oE -the eccentric motion of the eccentric drive shaft 21 and the motion oE
the linkage 30, the punch 25 is moved along a Elat oval course at a speed substantially equal -to the pheripheral speed of the die wheel 1. It is therefore possible to form the coupling heads 9 with accuracy while the die wheel 1 is continuously rotated.
The degree to which the lower connecting portions of -the coupling element blanks 8 are compressed by the punch 25 can be adjusted by turning the eccentric adjusting sleeve 22 with respect to the eccentric drive shaft 21.
~S~3~3 Also, the orbital course along which the punch 25 is moved may be varied by selecting a desired length oE the individual rod 31, 34 of -the linkage 30 in combination of the distance by which the axis of the eccen-tric adjasting sleeve 22 deviates from the axis L1 of the unnumbered driving shaft. Moreover, if more than one rod is added to the linkage 23, a much better orbital course for the punch 25 can be achieved. If -the distance between the cen-ter of the outer ring 24 and the axis Ll of the driving shaft needs not to be adjusted and is equal to the distance between the axis L2 of -the eccentric drive shaf-t 21 and the axis Ll of the driving shaft, -the eccentric adjusting sleeve 22 may be omitted and hence may be mounted on the eccentric drive shaft 21 via only the bearing 27.
Although the coupling elements are formed from a monofilament in the illustrated embodiment, the present invention is equally useful when applied to the case where the coupling elements are to be formed from a succession of laterally spaced coupling element blanks molded on a molding die wheel and interconnected by a pair of longitudinal connecting threads in a ladder-like fashion.
According to -the present invention, since the outer ring 24 mounted on the eccentric drive shaft 21 is connected at one end to the punch 25 and at the other end to the linkage 30, the punch 25 is movable so as to follow the rotation of the die wheel 1, owing to -the combination of the eccentric motion oE the eccentric drive mechanism ~S~3~
and the motion of the linkage 30. With this arrangement it is possible to form coupling heads 9 of the coupling elements 12 with accuracy while the die wheel 1 is continuously rotated, and therefore it is possible to manufacture good quallty coupling elements without reducing the rate of production.
Although various minor modifications may be suggested by those versed in the art, it should be understood that I
wish to embody within the scope of the patent warranged hereon, all such embodiments as reasonably and properly come within the scope of my contribution to the art.
sACKGRO~ND OF THE INVENTION
The present invention relates generally to the production of slide fasteners, and more particularly to an apparatus for forming a row of coupling elements for slide fasteners on a rotating die wheel.
Prior art and the present invention will be described with reference to the accompany drawings, wherein:
FIG. 1 is a front elevational view of an apparatus for forming a row of zigzag coupling elements according to the present invention;
FIGS. 2A, 3A, 4A and 5A are fragmentary enlarged plan views of a die wheel, illustrating the manner in which a monofilament is progressively shaped into a row of zigzag coupling elements;
FIGS. 2B, 3B, 4B and 5B are cross-sectional views of FIGS. 2A, 3A, 4A and 5A, respectively;
FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 1;
FIGS. 7A through 7D are cross-sectional views taken along an annular peripheral groove of the die wheel, illustrating the movement of a punch;
FIG. 8 (on the sheet of Figure 6) is a fragmentary side elevational view of the zig-zag-shaped monofilament having been folded into successive U shaped coupling element blanks;
~2~3~
Fig. 9 (on the sheet of Figure 6) is a view similar-to FIG. 8, showing a row of eoupling elements each having a eoupling head shaped by the puneh aeeording to the present invention; and FIG. 10 (on the sheet of Figure 6) is a view similar to FIG. 9, shcwing a row of eoupling elements eaeh having an objeetionably deformed coupllny .~eau shaped by a conventicnal punch.
Canadian Patent No. 669,722 and Japanese Patent Laid-Open Publication No. 59-125506 disclose a coupling-element forming apparatus whieh eomprises a heated die wheel having an annular eentral groove in its peripheral surface and a pair of rows of circumferentially staggered pins disposed one row on each side of the groove. In this prior apparatus, a monofilament of thermoplastic synthetic resin is wound around the pins on the peripheral surface of the rotating die wheel, and then it is forced into the groove so as to be folded into a succession of ~-shaped coupling element blanks, and subsequently the successive ~-shaped eoupling elemen-t blanks are shaped into a final shape as their lower turned portions are deformed by a punch linearly movable into the groove. A primary problem with the known apparatus is that beeause the puneh moves linearly, as shown in FIG. 10 of the accompanying drawings, the eoupling heads 9a would be shaped as objectionably flowed to one side, if the die wheel is continuously rotated during the shaping of the coupling heads 9a. This objectionably deformed coupling heads 9a would impede l3~
correct coupling of the resulting coupling elements 12~o In order to avoid such objectionably deformed coupling heads, the die wheel of the known apparatus must be rotated in-termittently as the punch reciprocates into and out of the groove. Because of this intermittent rotation of the die wheel, an adequate rate of production cannot be achieved.
SUMMARY OF THE INVENTION
It is therefore on object of the present invention to provide an apparatus for forming a row of coupling elements for slide fasteners which apparatus has a punching unit capable of shaping coupling heads of a correct for~ while a die wheel is continuously rotated.
According to the present invention, an apparatus, for forming a row of slide fastener coupling element, comprises a continuously rotatable die wheel having an annular peripheral groove for receiving a row of coupling element blanks in folded fashion, and a punching unit for forming coupling heads on the blanks received in the groove. The punching unit includes a punch, an eccentric drive mechanism for imparting eccentric motion -to the punch, and a linkage for regulating the eccentric motion of the punch, the drive mechanism having an outer ring connected at opposite ends to the punch and the linkage. Owing to the combination of the eccentric motion oE the outer ring and the motion of the linkage, the punch is moved so as to follow the rotation oE the die wheel while the coupling 3~
heads are shaped on each stroke of the punch. With this arrangement it is possible to shape the coupling heads with accuracy while the die wheel is continuously ro-tated.
Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structura] embodiment incorporating -the principles of the present invention is shown by way of illustrative example.
~ L~D DESCRIPTIO~
As shown in FIG. 1, an apparatus for forming a row of continuous zigzag coupling elements 12 for slide fasteners comprises a die wheel 1 mounted on a frame 2 for continuous rotation. The die wheel 1 has an annular central groove 5 in its peripheral surface 4, and a pair of rows of circumferentially staggered pins 4, 4 disposed one row each side of the groove 5, as shown in FIGS. 2A and 2B, there being a pair of rows of circumferentially staggered projections 6, 6 on opposite side walls of the groove 5.
The apparatus also includes a winding unit 13 for winging a monofilament 7 of thermoplastic synthe-tic resin alternately around the pins 4 across the central groove 5 in a zigzag form (FIG. 2A), a lifting unit 14 for lifting up the zigzag monofilament 7 away from the pins 4 (FIG.
3B), and a bending unit 15 for forcing the lifted zigzag monofilament 7 into the central groove 5 to form a row of zigzag coupling element blanks 8 having parallel legs 10 interconnected at their lower ends by lower connecting portions (FIGS. 3A and 3B).
3~
The apparatus still also includes a punching unit 20 for deforming each lower connecting portion to form a coupling head 9 having a pair of latera]. projections (FlGS.
4A and 4B), a hammering unit 16 for bending upper end portions of -the parallel legs 10 la-terally outwardly away from each other to form raised connecting portions 11, 11 in-terconnecting adjacent coupling element blanks 8 (FIGS.
5A and 5B), and a discharging unit 17 for removing the thus formed coupling elements 12 from the die wheel 1. The die wheel 1 is heated by a heating unit 18 disposed on the upper side of the die wheel 1 and is cooled by a cooling uni-t 19 disposed on the lower side of the die wheel 1.
The punchi.ng unit 20 is disposed on the rear side of the die wheel 1 (FIG. 1) and includes a punch 25, an eccentric drive mechanism for moving the punch 25, and a linkage 30 for regulating the movement of the punch 25. As shown in FIG. 6, -the eccentric drive mechanism includes an eccentric drive shaft 21 having an axis L2 eccentric to the axis Ll of a driving sha:Et (not numberecl), an eccentri.c adjusting sleeve 22 of a circumferentially increasing thickness mounted on the eccentric drive shaEt 21 and secured -thereto by means of a headless screw 23. An outer ring 24 is ro-tatably moun-ted on the eccentric adjusting sleeve 22 via a bearing 27, and an inner ring oE the bearing 27 is fixedly secured to the eccentric drive shaft 21 by means of a washer 28 and a screw 29 threadedly extending into a free end of the eccen-tric drive shaft 21.
~25~36~
By loosening the screws 23, 29, the eccentric adjusting sleeve 22 can be circumferentially moved about the eccen-tric drive shaft 21 through an angle for adjusting the distance by which the center of -the outer ring 24 deviates from the axis Ll of the unnumbered driving shaft.
The punch 25 is a-ttached by a screw 26 to one end oE
the outer ring 24 so as to face the peripheral surface 3 of the die wheel 1 in registry with the groove 5. As shown in FIG. 1, the linkage 30 includes a first rod 34 extending from the other end of the outer ring 24 remotely from the punch 25, and a second rod 31 pivotally mounted at one end on the frame 2 by means of a pin 32 and pivotally connected at the other end to a free end of the first rod 34. The first and second rods 34, 31 are pivotable, in response to eccentric motion of the outer ring 24 caused by the rota-tion of the eccentric drive shaft 21, for regulating the motion of -the ou-ter ring 24.
FIGS. 7A through 7D illustrate a sequence of movements of -the punch 25 during a single rotation oE the eccentric drive shaf-t 21, showing the manner in which several successive coupling heads 9 are formed on the lower connecting portions of the folcled coupling element blanks 8. Firstly, a punching head oE the punch 25 is disposed midway in the annular central groove 5, as shown in FIG.
7A. Then as the eccentric drive shaft 21 s-tarts rotating to cause eccentric mo-tion, the punch 25 is moved toward the bottom of the groove 5, and at the same time, it is also ~S~
moved in the direction of rotation of the die wheel 21, namely, from -the phantom-line position to the solid-line position in FIG. 7B, thus pressing several lower connecting portions of the folded coupling element blanks 8 against the bottom of the groove 5 to form coupling heads 9.
The formation of -the coupling heads 9 continues as the punch 25 is further moved from the phantom-line position to -the solid-line position in FIG. 7C, following the rotation of the die wheel 1. Finally, the punch 25 is moved gradually away from the bottom of the groove 5, and at the same time, it is also moved in a direction opposite to the rotation of the die wheel 2, from the phantom-line posi-tion to the solid~line position in FIG. 7D. As a result, -the punch 25 returns to the initial position of FIG. 7A and hence a single cycle of movements of the punch 25 has been completed.
Thus, owing to -the combination oE -the eccentric motion of the eccentric drive shaft 21 and the motion oE
the linkage 30, the punch 25 is moved along a Elat oval course at a speed substantially equal -to the pheripheral speed of the die wheel 1. It is therefore possible to form the coupling heads 9 with accuracy while the die wheel 1 is continuously rotated.
The degree to which the lower connecting portions of -the coupling element blanks 8 are compressed by the punch 25 can be adjusted by turning the eccentric adjusting sleeve 22 with respect to the eccentric drive shaft 21.
~S~3~3 Also, the orbital course along which the punch 25 is moved may be varied by selecting a desired length oE the individual rod 31, 34 of -the linkage 30 in combination of the distance by which the axis of the eccen-tric adjasting sleeve 22 deviates from the axis L1 of the unnumbered driving shaft. Moreover, if more than one rod is added to the linkage 23, a much better orbital course for the punch 25 can be achieved. If -the distance between the cen-ter of the outer ring 24 and the axis Ll of the driving shaft needs not to be adjusted and is equal to the distance between the axis L2 of -the eccentric drive shaf-t 21 and the axis Ll of the driving shaft, -the eccentric adjusting sleeve 22 may be omitted and hence may be mounted on the eccentric drive shaft 21 via only the bearing 27.
Although the coupling elements are formed from a monofilament in the illustrated embodiment, the present invention is equally useful when applied to the case where the coupling elements are to be formed from a succession of laterally spaced coupling element blanks molded on a molding die wheel and interconnected by a pair of longitudinal connecting threads in a ladder-like fashion.
According to -the present invention, since the outer ring 24 mounted on the eccentric drive shaft 21 is connected at one end to the punch 25 and at the other end to the linkage 30, the punch 25 is movable so as to follow the rotation of the die wheel 1, owing to -the combination of the eccentric motion oE the eccentric drive mechanism ~S~3~
and the motion of the linkage 30. With this arrangement it is possible to form coupling heads 9 of the coupling elements 12 with accuracy while the die wheel 1 is continuously rotated, and therefore it is possible to manufacture good quallty coupling elements without reducing the rate of production.
Although various minor modifications may be suggested by those versed in the art, it should be understood that I
wish to embody within the scope of the patent warranged hereon, all such embodiments as reasonably and properly come within the scope of my contribution to the art.
Claims (3)
1. An apparatus for forming a row of coupling elements for slide fasteners from a row of coupling element blanks of thermoplastic synthetic resin, comprising:
(a) a frame;
(b) a die wheel mounted on said frame for continuous rotation and having an annular groove in its peripheral surface for receiving the row of coupling element blanks in U-shaped folded fashion; and (c) a punching unit mounted on said frame in confronting relation to said peripheral surface of said die wheel for punching the folded coupling element blanks in said groove to form coupling heads, said punching unit including 1) an eccentric drive shaft eccentrically connected to a driving shaft rotatably supported on said frame for eccentric rotation, 2) an outer ring mounted on said eccentric drive shaft and responsive to the eccentric rotation thereto for eccentric motion, 3) a punch mounted on one end of said outer ring and projecting into said annular groove for shaping the coupling heads on the folded coupling element blanks, and 4) a linkage connected to the other end of said outer ring for regulating the eccentric motion of said outer ring in such a manner that said punch follows the rotation of said die wheel while the coupling heads are shaped on each stroke of said punch.
(a) a frame;
(b) a die wheel mounted on said frame for continuous rotation and having an annular groove in its peripheral surface for receiving the row of coupling element blanks in U-shaped folded fashion; and (c) a punching unit mounted on said frame in confronting relation to said peripheral surface of said die wheel for punching the folded coupling element blanks in said groove to form coupling heads, said punching unit including 1) an eccentric drive shaft eccentrically connected to a driving shaft rotatably supported on said frame for eccentric rotation, 2) an outer ring mounted on said eccentric drive shaft and responsive to the eccentric rotation thereto for eccentric motion, 3) a punch mounted on one end of said outer ring and projecting into said annular groove for shaping the coupling heads on the folded coupling element blanks, and 4) a linkage connected to the other end of said outer ring for regulating the eccentric motion of said outer ring in such a manner that said punch follows the rotation of said die wheel while the coupling heads are shaped on each stroke of said punch.
2. An apparatus according to claim 1, said punching unit further including an eccentric adjusting sleeve disposed between said eccentric drive shaft and said outer ring, said eccentric adjusting sleeve having a circumferentially gradually increasing thickness and adjustably mounted on said eccentric drive shaft.
3. An apparatus according to claim 1, said linkage including a first rod extending from said outer ring, and a second rod pivotally connected at one end to a free end of said first rod and pivotally mounted at the other end to said frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60-38102 | 1985-03-16 | ||
| JP1985038102U JPH0212890Y2 (en) | 1985-03-16 | 1985-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1251308A true CA1251308A (en) | 1989-03-21 |
Family
ID=12516107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000503840A Expired CA1251308A (en) | 1985-03-16 | 1986-03-11 | Apparatus for forming a row of coupling elements for slide fastener |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4665613A (en) |
| EP (1) | EP0195367B1 (en) |
| JP (1) | JPH0212890Y2 (en) |
| KR (1) | KR870003051Y1 (en) |
| AU (1) | AU560449B2 (en) |
| BR (1) | BR8601454A (en) |
| CA (1) | CA1251308A (en) |
| DE (1) | DE3673543D1 (en) |
| ES (1) | ES8701594A1 (en) |
| GB (1) | GB2173145B (en) |
| HK (1) | HK29892A (en) |
| MY (1) | MY101010A (en) |
| PH (1) | PH25666A (en) |
| SG (1) | SG59227G (en) |
| ZA (1) | ZA861594B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5688539A (en) * | 1996-05-03 | 1997-11-18 | Chung Shan Institute Of Science & Technology | Zipper teeth forming mechanism for zipper forming machines |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA669722A (en) * | 1963-09-03 | Streicher Kurt | Method and machine for the production of closure elements for slide fasteners | |
| US3054149A (en) * | 1958-02-22 | 1962-09-18 | Talon Inc | Method for the production of closure elements for slide fasteners |
| US3137036A (en) * | 1961-07-17 | 1964-06-16 | Conmar Prod Corp | Method and apparatus for making plastic slide fasteners |
| GB1044034A (en) * | 1962-04-26 | 1966-09-28 | Novi Patentverwertungs G M B H | A method of and apparatus for the manufacture of woven sliding clasp fasteners |
| US3336640A (en) * | 1965-04-19 | 1967-08-22 | Talon Inc | Slide fastener |
| US3594865A (en) * | 1969-07-10 | 1971-07-27 | American Velcro Inc | Apparatus for molding plastic shapes in molding recesses formed in moving endless wire dies |
| US3672805A (en) * | 1969-12-08 | 1972-06-27 | Bernd Porepp | Apparatus for forming a plastic article |
| US3688805A (en) * | 1970-02-12 | 1972-09-05 | Textron Inc | Machine for coiling filamentary material |
| DE2007593B2 (en) * | 1970-02-19 | 1973-05-10 | Opti-Holding Ag, Glarus (Schweiz) | DEVICE FOR THERMAL FIXING OF ROWS OF ZIPPER LINKS MADE OF PLASTIC MONOFILAMENT |
| US4182600A (en) * | 1975-08-04 | 1980-01-08 | Textron, Inc. | Slide fastening element apparatus |
| JPS54161439A (en) * | 1978-06-09 | 1979-12-21 | Yoshida Kogyo Kk | Method and device for making element train for slide fastener |
| JPS59125506A (en) * | 1982-12-28 | 1984-07-19 | ワイケイケイ株式会社 | Apparatus for molding zigzag element for slide fastener |
-
1985
- 1985-03-16 JP JP1985038102U patent/JPH0212890Y2/ja not_active Expired
-
1986
- 1986-03-04 ZA ZA861594A patent/ZA861594B/en unknown
- 1986-03-06 GB GB8605525A patent/GB2173145B/en not_active Expired
- 1986-03-06 SG SG305/92A patent/SG59227G/en unknown
- 1986-03-11 CA CA000503840A patent/CA1251308A/en not_active Expired
- 1986-03-11 AU AU54490/86A patent/AU560449B2/en not_active Ceased
- 1986-03-13 ES ES86552952A patent/ES8701594A1/en not_active Expired
- 1986-03-13 DE DE8686103363T patent/DE3673543D1/en not_active Expired - Lifetime
- 1986-03-13 EP EP86103363A patent/EP0195367B1/en not_active Expired - Lifetime
- 1986-03-14 US US06/839,635 patent/US4665613A/en not_active Expired - Fee Related
- 1986-03-14 BR BR8601454A patent/BR8601454A/en not_active IP Right Cessation
- 1986-03-14 PH PH33527A patent/PH25666A/en unknown
- 1986-03-15 KR KR868603094U patent/KR870003051Y1/en not_active IP Right Cessation
-
1987
- 1987-08-21 MY MYPI87001414A patent/MY101010A/en unknown
-
1992
- 1992-04-23 HK HK298/92A patent/HK29892A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB2173145A (en) | 1986-10-08 |
| EP0195367B1 (en) | 1990-08-22 |
| GB8605525D0 (en) | 1986-04-09 |
| PH25666A (en) | 1991-09-04 |
| ZA861594B (en) | 1986-10-29 |
| HK29892A (en) | 1992-05-01 |
| SG59227G (en) | 1992-05-15 |
| BR8601454A (en) | 1986-12-09 |
| EP0195367A2 (en) | 1986-09-24 |
| JPS61153512U (en) | 1986-09-24 |
| MY101010A (en) | 1991-06-29 |
| JPH0212890Y2 (en) | 1990-04-11 |
| US4665613A (en) | 1987-05-19 |
| ES8701594A1 (en) | 1986-12-16 |
| ES552952A0 (en) | 1986-12-16 |
| AU5449086A (en) | 1986-09-18 |
| KR870003051Y1 (en) | 1987-09-15 |
| AU560449B2 (en) | 1987-04-09 |
| DE3673543D1 (en) | 1990-09-27 |
| EP0195367A3 (en) | 1988-09-14 |
| GB2173145B (en) | 1989-07-26 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |