CA1168032A - Apparatus for producing fasteners - Google Patents
Apparatus for producing fastenersInfo
- Publication number
- CA1168032A CA1168032A CA000386614A CA386614A CA1168032A CA 1168032 A CA1168032 A CA 1168032A CA 000386614 A CA000386614 A CA 000386614A CA 386614 A CA386614 A CA 386614A CA 1168032 A CA1168032 A CA 1168032A
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- CA
- Canada
- Prior art keywords
- fasteners
- plastic rod
- molded plastic
- slitting
- continuous molded
- 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.)
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Abstract
Abstract of the Disclosure Disclosed is apparatus for producing groups of joined fasteners made of plastics, each of fasteners being composed of a head section, a bar section and a string section connecting the head and the bar sections at one and the other ends thereof. The apparatus comprises feeding means for feeding a continuous molded plastic rod having substantially the same cross-sectional shape as the vertical sectional shape of said fasteners along the longitudinal direction of the rod and slitting means for slitting said continuous molded plastic rod in a direction perpendicular to the longitudinal direction thereof at predetermined intervals in a manner such that a part of the cross-section of the bar section is not cut in the continuous molded plastic rod.
Description
116~03~
APPARATUS FOR PRODUCING FASTENERS
Background of the Invention _ The present invention relates to apparatus for producing ~roups of joined fasteners made of plastics.
~ore particularly, the invention relates to apparatus for producing groups of joined fasteners in which respective fasteners are arranged in arow at a very high density with very small gaps formed between every two adjacent fasteners.
A plastic-molded fastener having a head section on one end and a bar section on the other end of a string section connecting the head and the bar sections together has been known as means for attaching a tag or the like to a commercial product such as a garment for example. More speci-fically, as shown in Fig. 1 of the accompanying drawings, this known fastener comprises an integrally molded plastic article such as the one shown at 100 and has a head section 101, a bar section 102 and a string section 103 connecting the sections 101 and 102 to each other. In use of the fastener 100, the string section 103 is applied through a tag 120 and the bar section 102 is anchored to a garment 130, a commercial product, to thereby have the tag 120 attached to the garment.
; In attaching a fastener of the sort above referred to, together with a tag, to an article of merchandise such as a garment, it is advantageous to make use of a tag attacher having a tubular needle as disclosed in for example the United States Patent 3,650,451 to Norman R. Walland et al .
) ~ 6~32 because it then is feasible to dispense a number of fasteners individually continuously at a high operation efficiency.
When fasteners are to be thus attached by means of a tag attacher, it is necessary to prepare fasteners in the form S of an integral group of joined fasteners 200 comprising a row of fasteners 100 connected through connecting sections 104 between bar sections 102 of every two adjacent fasteners 100, as shown in Fig. 2 for example. The integrally molded group of joined fasteners 200 may be mounted on the above-mentioned tag attacher, and with respect to each fastener 100,the bar section 102 thereof is held by the tubular needle of the tag attacher and the fastener 100 is pushed out while the connecting section 104 is being cut, whereby the fastener 100 is separated. Then, the tag is put on the above-mentioned tubular needle rom the top end of the needle, and the needle is stuck into a commercial product such as a garment together with the bar section 102 of the fastener 100 and then, the needle alone is drawn out of the commercial product. The bar section 102 is left on the back side of the commercial product and thus attached to the commercial product.
With the above-mentioned group of joined fasteners 200, the smaller is the pitch P between every two adjacent fasteners 100, the more advantageously accomplished can be the fastener-attaching operation. More specifically, the smaller is the pitch P, the more increased is the fastener density per unit row length and the more reduced is the I 1 680~
frequency of mounting the group of joined fasteners on the tag attacher. Moreover, when the pitch P is large, entan-glement occurs among fasteners lO0 more readily than in the case where the pitch P is small, and mounting of the fasteners on the tag attacher becomes difficult. Further-more, the larger is the pitch P, the larger becomes the amount of the material necessary for the connecting sections 104 connecting the fasteners 100 to one another, resulting in a greater consumption of the material.
In the conventional process for producing a group of joined fasteners, a casting mold is used for molding of plastics, and because of limitations due to the use of such casting mold, it is impossible to reduce the above-mentioned pitch P below a certain critical level. More specifically, whereas the casting mold should naturally be required to have a strength sufficient to resist the molding pressure, if the thickness of a partition wall between two adjacent fasteners is reduced to too small a level in this casting mold, the partition wall is broken by the molding pressure during the molding step, rendering the molding operation impossible. Accordingly, so far as a casting mold is employed, it is impossible to reduce below a certain critical level the pitch between every two adjacent fasteners in a group of joined fasteners.
68~32 Brief Summary of the Invention It is therefore a primary object of the present invention to provide apparatus for producing groups of joined fasteners by which a great number of fasteners are integrally assembled at a very high density with the pitch between every two adjacent fasteners being remarkably reduced.
Another object of the invention is to provide apparatus for producing groups of fasteners by which groups of joined fasteners having a very high assembling density can be obtained very efficiently.
In order to accomplish the above-mentioned objects, in accordance with the present invention there is provided apparatus for producing groups of joined fasteners made of plastics, which comprises feeding means for feeding a conti-nuous molded plastic rod having substantially the same crosssectional shape as the vertical sectional shape of said fasteners along the longitudinal direction of the rod, and slitting or slicing means for slitting or slicing said continuous molded plastic rod in a direction perpendicular to the longitudinal direction thereof at predetermined intervals in a manner such that a part of the cross-section of the bar section is not cut in the continuous molded plastic rod, wherein said feeding means and said slitting or slicing means are synchronously operated to divide said continuous molded plastic rod in-to a plurality of fasteners.
1 1 68~3~
Other objects as well as advantageous features of the invention will become apparent from studying the following portion of the specification, the claims and the attached drawings.
Brief Description of the Drawings Fig. 1 is a perspective view showing the state in which a tag is attached to a garment by means of a fastener;
Fig. 2 is a perspective view showing a group of joined fasteners;
Fig. 3 is a diagram illustrating one embodiment of the apparatus for producing groups of joined fasteners according to the present invention;
Fig. 4 is a perspective view showing essential parts of the apparatus shown in Fig. 3;
Fig. 5 is a view showing the section taken along the line V-V in Fig. 4, which illustrates a slitting or slicing machine disposed in the apparatus shown in Fig. 3;
Fig. 6 is a view showing the section taken along the line VI-VI in Fig. 5;
Fig. 7 is a side view diagramatically illustrating a drawing machine disposed in the apparatus shown in Fig. 3;
Fig. 8 is a side view showing another embodiment of the slitting or slicing machine;
Fig. 9 is a view showing the section taken along the line IX-IX in Fig. 8;
Fig. 10 is a side view showing still another embodiment of the slitting or slicing machine; and Fig. 11 is a view showing the section taken along the line XI-XI in Fig. 10.
Detailed Description_of the Preferred Embodiments Referring to Fig. 3, an extruder 1 is disposed to extrude a melt of a plastic material such as polyamide, polyester, polyethylene or polypropylene in the form of a rod into a cooling bath 2 to effect solidification, and the solidified extrudate is taken up by means of a roller 3 to obtain a continuous plastic rod 4. The continuous plastic rod 4 is fed to feeding means comprising a pair of rollers, and then to ~litting or slicing means 6 while the amount or rate of feeding is being controlled by this feeding means 5, and the rod 4 is slit or sliced in a manner to be described in greater detail hereinafter. The reference numeral 7 represents a -tension-adjusting roller for adjusting the tension on the corltinuous plastic rod 4.
In Fig. 3, the continuous plastic rod 4 may be continuously fed to feeding means 5 as indicated by solid lines or, alternative to that, the rod 4 may be once wound on a bobbin 8 and then fed to the feeding means 5 from the wound bobbin as indicated by dotted lines.
As illustrated in detail in Fig. 4, the cross-section of the continuous plastic rod 4 is substantially I-shaped, and this cross-section comprises a head section part 4h corresponding to the head section of the fastener, a string section part 4s corresponding to the string section of the fastener and a bar section part 4b corresponding to : , :
the bar section of the fastener. The feeding means 5 comprises a pair of rollers 9 adapted to feed the continuous plastic rod 4 in a manner of gripping the rod from both sides thereof. The pair of rollers 9 are operated to repeat rotation and stopping alternately and feed the continuous plastic rod 4 to the slitting means 6 intermittently at predetermined intervals.
With reference to Figs. 5 and 5, the slitting means 6 comprises a pair of front and rear guide blocks 10 and 11 and a cutter disposed between the blocks 10 and 11 and driven thereat for reciprocation of rotation in clockwise and counter-clockwise directions. The guide blocks 10 and 11 have guide holes 13 and 14 for guiding the continuous plastic rod 4 through. Each of the guide holes 13 and 14 is shaped to have a configuration substantially the same as the cross-section of the continuous plastic rod 4 and allowing the rod 4 to pass through. The cutter 12 is formed to have a disc-like shape and is rotatably supported in a manner of the periphery thereof being fitted in an arcuate guide hole 15 in the guide block 10. The upper portion of the cutter 12 projected outside the guide blocks 10 and 11 is rotatably connected to a reciprocating rod 17. Accordingly, when the rod 17 is driven to reciprocate through an external power source, the cutter 12 is reciprocally rotated with the point O
as the center of rotation.
The cutter 12 has a hole 18 having substantially the same shape as that of the guide holes 13 and 14 of the guide blocks 10 and 11, and a sharp inner blade 18a is formed on the entire inner circumference of the hole 18.
This hole 18 is formed so that the center of the bar section part corresponding to the bar section of the fastener is substantially in agreement with the center O of rotation of the cutter 12. Accordingly, the continuous plastic rod 4 in the state of being supported in the guide blocks 10 and 11 is slit or sliced except the portion thereof corresponding to the rotation center O by reciprocal rotation of the cutter 12. The continuous plastic xod 4 is intermittently fed to the slitting or slicing means 6 by the feeding means 5 while repeating ~eeding and stopping at predetermined intervals as described hereinbefore. While the continuous plastic rod 4 is stopped, the cutter 12 is rotated to slit or slice the plastic rod 4 except a part of the bar section part as described hereinbefore, and while the continuous plastic rod 4 is being fed by a predetermined quantity, the rotary movement of the cutter 12 is stopped and the hole 18 of the cutter 12 is made in agreement with the guide holes 13 and 14 of the guide blocks 10 and 11. When the feeding means S and slitting means 6 are synchronously operated in the above-mentioned mannerj the continuous plastic rod 4 is formed into a group of joined fasteners 200 in which every two adjacent fasteners 100 are separated from each other through a slit. In this group of joined fasteners 200, the - ` I 1 68032 g respective fastene~s are separated from one another through very narrow slits, and the assembling density of the fasteners 100 is very high and the structure of the group of fastenrs 200 is very compact.
Downstream of or following the slitting means 6, drawing means 21 is disposed to draw string sections 103 of the group of joined fasteners 200 formed in the above-mentioned manner. This drawing means 21 comprises stationary rods 19 for supporting and guiding the lower faces of the bar sections 102 of the group of joined fasteners 200 and movable rods 20 adapted to gradually downwardly move while pressing the upper faces of the head sections of the group of joined ~asteners 200. By the action of the stationary rods 19 and movable rods 20, the drawing means 21 draws the string sections 103 of the group of joined fasteners 200 to ~ render the string sections 103 longer and finer, while the ; group of joined fasteners 200 is being advanced from the point A to the point B. When it is not necessary to render the string sections of the fasteners finer and longer, this drawing means 21 can be dispensed with.
As illustra~ed in detail in Fig. 7, while the movable rods 20 having a predetermined length are moved from the point A to the point B with advance of the continuous plastic rod 4 which has been slit or sliced r with the stationary rods 19 being kept stationary, the drawing means 21 is gradually moved forwardly and downwardly to simulta-neously draw the string sections 103 of all the fasteners ~ 3 68~32 engaged with the mobile rods 20, whereby a group of joined fasteners 200' is formed. When the movable rods 20 are shifted to the point B to complete the predetermined drawing operation, they are returned -to the point A and perform drawing of a subsequent group of fasteners. In this manner, the drawing operation is repeated.
Another embodiment of the slitting or slicing means that can be applied to the apparatus of the invention is illustrated in Figs. 8 and 9.
In this embodiment, a rotation shaft 30 is disposed so that it pierces through the guide blocks 10 and 11, and two single-edged blade cutters 32 are fixed to this rotation shaft 30 so that they are rotated integrally with the rotation shaft 30. The blade cutters 32 are rotated across the guide block 10 except a part 13a of the guide hole 13. Accordingly, the continuous plastic rod 4 guided by the guide block 10 is slit by this slitting means to form a group of joined fasteners 200 in which the portion corresponding to the part 13a which the blade cutters 32 do not traverse makes the connecting section.
In Figs. 10 and 11, still another embodiment of the slitting means that can be applied to the apparatus of the invention is illustrated.
In this embodiment, the guide block 10 alone is provided and the other guide block 11 is omitted, and a blade cutter 42 is arranged so that it can make a vertical movement.
Each side end at top of the blade cutter 42 is supported by a rod 43 guided by a guide frame 44, and the blade cutter 42 is always urged toward up by elastic force of a spring 45.
An eccentric cam 46 is disposed in contact with a central portion at the top face of the blade cutter 42 so that by a rotary movement of this eccentric cam 46, the blade cutter 42 is reciprocally moved in the vertical direction. A
guide groove 13a' is connected to a guide hole 13' of the guide block 10 at a part corresponding to the bar section of the fastenerO In this embodiment, there is used a continuous plastic rod which is molded to have substantially the same sectional shape as the sectional shape of the guide hole 13' including the guide groove 13'a.
In this slitting means, the blade cutter 42 is operated to make a vertical movement such that the blade cutter 42 traverses the guide hole 13' except the portion of the above-mentioned guide groove 13'a. Accordingly, by the movement of the blade cutter 42, the continuous plastic rod is formed into a group of joined fasteners in which the portions corresponding to the guide groove 13'a are shaped as connecting sections.
In the slitting means of the embodiments shown in Figs. 5 and 6 and Figs. 8 and 9, there are disposed a pair of front and rear guide blocks 10 and 11. In these embodi-ments, however, one guide block 11 may be omitted as in theembodiment shown in Figs. 10 and 11.
I 1 6~32 As will be apparent from the foregoing description, according to the apparatus of the present invention, in a group of joined fasteners, only a slit formed by the cutter is present between every two adjacent fasteners, and there-fore, the pitch between every two adjacent fasteners isremarkably reduced and the assembling density of the fasteners is remarkably increased. Accordingly, when this group of joined fasteners is mounted on a tag attacher and the respective fasteners are used for attaching tags to garments and the like, the frequency of mounting of fasteners can be reduced~ Furthermore, since entanglement among fasteners is not caused, the operation of mounting a group of joined fasteners on the tag attacher can be facilitated.
Still further, wasteful consumption of the material because of formation of portions to be discarded can be prevented.
The apparatus of the present invention is distinguishable over the conventional apparatus using a casting mold where respective groups of joined fasteners are individually molded batchwise, in the point that groups of joined fasteners can be manufactured in a continuous manner.
Therefore, the manufacturing efficiency can be remarkably enhanced.
APPARATUS FOR PRODUCING FASTENERS
Background of the Invention _ The present invention relates to apparatus for producing ~roups of joined fasteners made of plastics.
~ore particularly, the invention relates to apparatus for producing groups of joined fasteners in which respective fasteners are arranged in arow at a very high density with very small gaps formed between every two adjacent fasteners.
A plastic-molded fastener having a head section on one end and a bar section on the other end of a string section connecting the head and the bar sections together has been known as means for attaching a tag or the like to a commercial product such as a garment for example. More speci-fically, as shown in Fig. 1 of the accompanying drawings, this known fastener comprises an integrally molded plastic article such as the one shown at 100 and has a head section 101, a bar section 102 and a string section 103 connecting the sections 101 and 102 to each other. In use of the fastener 100, the string section 103 is applied through a tag 120 and the bar section 102 is anchored to a garment 130, a commercial product, to thereby have the tag 120 attached to the garment.
; In attaching a fastener of the sort above referred to, together with a tag, to an article of merchandise such as a garment, it is advantageous to make use of a tag attacher having a tubular needle as disclosed in for example the United States Patent 3,650,451 to Norman R. Walland et al .
) ~ 6~32 because it then is feasible to dispense a number of fasteners individually continuously at a high operation efficiency.
When fasteners are to be thus attached by means of a tag attacher, it is necessary to prepare fasteners in the form S of an integral group of joined fasteners 200 comprising a row of fasteners 100 connected through connecting sections 104 between bar sections 102 of every two adjacent fasteners 100, as shown in Fig. 2 for example. The integrally molded group of joined fasteners 200 may be mounted on the above-mentioned tag attacher, and with respect to each fastener 100,the bar section 102 thereof is held by the tubular needle of the tag attacher and the fastener 100 is pushed out while the connecting section 104 is being cut, whereby the fastener 100 is separated. Then, the tag is put on the above-mentioned tubular needle rom the top end of the needle, and the needle is stuck into a commercial product such as a garment together with the bar section 102 of the fastener 100 and then, the needle alone is drawn out of the commercial product. The bar section 102 is left on the back side of the commercial product and thus attached to the commercial product.
With the above-mentioned group of joined fasteners 200, the smaller is the pitch P between every two adjacent fasteners 100, the more advantageously accomplished can be the fastener-attaching operation. More specifically, the smaller is the pitch P, the more increased is the fastener density per unit row length and the more reduced is the I 1 680~
frequency of mounting the group of joined fasteners on the tag attacher. Moreover, when the pitch P is large, entan-glement occurs among fasteners lO0 more readily than in the case where the pitch P is small, and mounting of the fasteners on the tag attacher becomes difficult. Further-more, the larger is the pitch P, the larger becomes the amount of the material necessary for the connecting sections 104 connecting the fasteners 100 to one another, resulting in a greater consumption of the material.
In the conventional process for producing a group of joined fasteners, a casting mold is used for molding of plastics, and because of limitations due to the use of such casting mold, it is impossible to reduce the above-mentioned pitch P below a certain critical level. More specifically, whereas the casting mold should naturally be required to have a strength sufficient to resist the molding pressure, if the thickness of a partition wall between two adjacent fasteners is reduced to too small a level in this casting mold, the partition wall is broken by the molding pressure during the molding step, rendering the molding operation impossible. Accordingly, so far as a casting mold is employed, it is impossible to reduce below a certain critical level the pitch between every two adjacent fasteners in a group of joined fasteners.
68~32 Brief Summary of the Invention It is therefore a primary object of the present invention to provide apparatus for producing groups of joined fasteners by which a great number of fasteners are integrally assembled at a very high density with the pitch between every two adjacent fasteners being remarkably reduced.
Another object of the invention is to provide apparatus for producing groups of fasteners by which groups of joined fasteners having a very high assembling density can be obtained very efficiently.
In order to accomplish the above-mentioned objects, in accordance with the present invention there is provided apparatus for producing groups of joined fasteners made of plastics, which comprises feeding means for feeding a conti-nuous molded plastic rod having substantially the same crosssectional shape as the vertical sectional shape of said fasteners along the longitudinal direction of the rod, and slitting or slicing means for slitting or slicing said continuous molded plastic rod in a direction perpendicular to the longitudinal direction thereof at predetermined intervals in a manner such that a part of the cross-section of the bar section is not cut in the continuous molded plastic rod, wherein said feeding means and said slitting or slicing means are synchronously operated to divide said continuous molded plastic rod in-to a plurality of fasteners.
1 1 68~3~
Other objects as well as advantageous features of the invention will become apparent from studying the following portion of the specification, the claims and the attached drawings.
Brief Description of the Drawings Fig. 1 is a perspective view showing the state in which a tag is attached to a garment by means of a fastener;
Fig. 2 is a perspective view showing a group of joined fasteners;
Fig. 3 is a diagram illustrating one embodiment of the apparatus for producing groups of joined fasteners according to the present invention;
Fig. 4 is a perspective view showing essential parts of the apparatus shown in Fig. 3;
Fig. 5 is a view showing the section taken along the line V-V in Fig. 4, which illustrates a slitting or slicing machine disposed in the apparatus shown in Fig. 3;
Fig. 6 is a view showing the section taken along the line VI-VI in Fig. 5;
Fig. 7 is a side view diagramatically illustrating a drawing machine disposed in the apparatus shown in Fig. 3;
Fig. 8 is a side view showing another embodiment of the slitting or slicing machine;
Fig. 9 is a view showing the section taken along the line IX-IX in Fig. 8;
Fig. 10 is a side view showing still another embodiment of the slitting or slicing machine; and Fig. 11 is a view showing the section taken along the line XI-XI in Fig. 10.
Detailed Description_of the Preferred Embodiments Referring to Fig. 3, an extruder 1 is disposed to extrude a melt of a plastic material such as polyamide, polyester, polyethylene or polypropylene in the form of a rod into a cooling bath 2 to effect solidification, and the solidified extrudate is taken up by means of a roller 3 to obtain a continuous plastic rod 4. The continuous plastic rod 4 is fed to feeding means comprising a pair of rollers, and then to ~litting or slicing means 6 while the amount or rate of feeding is being controlled by this feeding means 5, and the rod 4 is slit or sliced in a manner to be described in greater detail hereinafter. The reference numeral 7 represents a -tension-adjusting roller for adjusting the tension on the corltinuous plastic rod 4.
In Fig. 3, the continuous plastic rod 4 may be continuously fed to feeding means 5 as indicated by solid lines or, alternative to that, the rod 4 may be once wound on a bobbin 8 and then fed to the feeding means 5 from the wound bobbin as indicated by dotted lines.
As illustrated in detail in Fig. 4, the cross-section of the continuous plastic rod 4 is substantially I-shaped, and this cross-section comprises a head section part 4h corresponding to the head section of the fastener, a string section part 4s corresponding to the string section of the fastener and a bar section part 4b corresponding to : , :
the bar section of the fastener. The feeding means 5 comprises a pair of rollers 9 adapted to feed the continuous plastic rod 4 in a manner of gripping the rod from both sides thereof. The pair of rollers 9 are operated to repeat rotation and stopping alternately and feed the continuous plastic rod 4 to the slitting means 6 intermittently at predetermined intervals.
With reference to Figs. 5 and 5, the slitting means 6 comprises a pair of front and rear guide blocks 10 and 11 and a cutter disposed between the blocks 10 and 11 and driven thereat for reciprocation of rotation in clockwise and counter-clockwise directions. The guide blocks 10 and 11 have guide holes 13 and 14 for guiding the continuous plastic rod 4 through. Each of the guide holes 13 and 14 is shaped to have a configuration substantially the same as the cross-section of the continuous plastic rod 4 and allowing the rod 4 to pass through. The cutter 12 is formed to have a disc-like shape and is rotatably supported in a manner of the periphery thereof being fitted in an arcuate guide hole 15 in the guide block 10. The upper portion of the cutter 12 projected outside the guide blocks 10 and 11 is rotatably connected to a reciprocating rod 17. Accordingly, when the rod 17 is driven to reciprocate through an external power source, the cutter 12 is reciprocally rotated with the point O
as the center of rotation.
The cutter 12 has a hole 18 having substantially the same shape as that of the guide holes 13 and 14 of the guide blocks 10 and 11, and a sharp inner blade 18a is formed on the entire inner circumference of the hole 18.
This hole 18 is formed so that the center of the bar section part corresponding to the bar section of the fastener is substantially in agreement with the center O of rotation of the cutter 12. Accordingly, the continuous plastic rod 4 in the state of being supported in the guide blocks 10 and 11 is slit or sliced except the portion thereof corresponding to the rotation center O by reciprocal rotation of the cutter 12. The continuous plastic xod 4 is intermittently fed to the slitting or slicing means 6 by the feeding means 5 while repeating ~eeding and stopping at predetermined intervals as described hereinbefore. While the continuous plastic rod 4 is stopped, the cutter 12 is rotated to slit or slice the plastic rod 4 except a part of the bar section part as described hereinbefore, and while the continuous plastic rod 4 is being fed by a predetermined quantity, the rotary movement of the cutter 12 is stopped and the hole 18 of the cutter 12 is made in agreement with the guide holes 13 and 14 of the guide blocks 10 and 11. When the feeding means S and slitting means 6 are synchronously operated in the above-mentioned mannerj the continuous plastic rod 4 is formed into a group of joined fasteners 200 in which every two adjacent fasteners 100 are separated from each other through a slit. In this group of joined fasteners 200, the - ` I 1 68032 g respective fastene~s are separated from one another through very narrow slits, and the assembling density of the fasteners 100 is very high and the structure of the group of fastenrs 200 is very compact.
Downstream of or following the slitting means 6, drawing means 21 is disposed to draw string sections 103 of the group of joined fasteners 200 formed in the above-mentioned manner. This drawing means 21 comprises stationary rods 19 for supporting and guiding the lower faces of the bar sections 102 of the group of joined fasteners 200 and movable rods 20 adapted to gradually downwardly move while pressing the upper faces of the head sections of the group of joined ~asteners 200. By the action of the stationary rods 19 and movable rods 20, the drawing means 21 draws the string sections 103 of the group of joined fasteners 200 to ~ render the string sections 103 longer and finer, while the ; group of joined fasteners 200 is being advanced from the point A to the point B. When it is not necessary to render the string sections of the fasteners finer and longer, this drawing means 21 can be dispensed with.
As illustra~ed in detail in Fig. 7, while the movable rods 20 having a predetermined length are moved from the point A to the point B with advance of the continuous plastic rod 4 which has been slit or sliced r with the stationary rods 19 being kept stationary, the drawing means 21 is gradually moved forwardly and downwardly to simulta-neously draw the string sections 103 of all the fasteners ~ 3 68~32 engaged with the mobile rods 20, whereby a group of joined fasteners 200' is formed. When the movable rods 20 are shifted to the point B to complete the predetermined drawing operation, they are returned -to the point A and perform drawing of a subsequent group of fasteners. In this manner, the drawing operation is repeated.
Another embodiment of the slitting or slicing means that can be applied to the apparatus of the invention is illustrated in Figs. 8 and 9.
In this embodiment, a rotation shaft 30 is disposed so that it pierces through the guide blocks 10 and 11, and two single-edged blade cutters 32 are fixed to this rotation shaft 30 so that they are rotated integrally with the rotation shaft 30. The blade cutters 32 are rotated across the guide block 10 except a part 13a of the guide hole 13. Accordingly, the continuous plastic rod 4 guided by the guide block 10 is slit by this slitting means to form a group of joined fasteners 200 in which the portion corresponding to the part 13a which the blade cutters 32 do not traverse makes the connecting section.
In Figs. 10 and 11, still another embodiment of the slitting means that can be applied to the apparatus of the invention is illustrated.
In this embodiment, the guide block 10 alone is provided and the other guide block 11 is omitted, and a blade cutter 42 is arranged so that it can make a vertical movement.
Each side end at top of the blade cutter 42 is supported by a rod 43 guided by a guide frame 44, and the blade cutter 42 is always urged toward up by elastic force of a spring 45.
An eccentric cam 46 is disposed in contact with a central portion at the top face of the blade cutter 42 so that by a rotary movement of this eccentric cam 46, the blade cutter 42 is reciprocally moved in the vertical direction. A
guide groove 13a' is connected to a guide hole 13' of the guide block 10 at a part corresponding to the bar section of the fastenerO In this embodiment, there is used a continuous plastic rod which is molded to have substantially the same sectional shape as the sectional shape of the guide hole 13' including the guide groove 13'a.
In this slitting means, the blade cutter 42 is operated to make a vertical movement such that the blade cutter 42 traverses the guide hole 13' except the portion of the above-mentioned guide groove 13'a. Accordingly, by the movement of the blade cutter 42, the continuous plastic rod is formed into a group of joined fasteners in which the portions corresponding to the guide groove 13'a are shaped as connecting sections.
In the slitting means of the embodiments shown in Figs. 5 and 6 and Figs. 8 and 9, there are disposed a pair of front and rear guide blocks 10 and 11. In these embodi-ments, however, one guide block 11 may be omitted as in theembodiment shown in Figs. 10 and 11.
I 1 6~32 As will be apparent from the foregoing description, according to the apparatus of the present invention, in a group of joined fasteners, only a slit formed by the cutter is present between every two adjacent fasteners, and there-fore, the pitch between every two adjacent fasteners isremarkably reduced and the assembling density of the fasteners is remarkably increased. Accordingly, when this group of joined fasteners is mounted on a tag attacher and the respective fasteners are used for attaching tags to garments and the like, the frequency of mounting of fasteners can be reduced~ Furthermore, since entanglement among fasteners is not caused, the operation of mounting a group of joined fasteners on the tag attacher can be facilitated.
Still further, wasteful consumption of the material because of formation of portions to be discarded can be prevented.
The apparatus of the present invention is distinguishable over the conventional apparatus using a casting mold where respective groups of joined fasteners are individually molded batchwise, in the point that groups of joined fasteners can be manufactured in a continuous manner.
Therefore, the manufacturing efficiency can be remarkably enhanced.
Claims (6)
1. Apparatus for producing groups of joined fasteners made of plastics, which comprises feeding means for feeding a continuous molded plastic rod having substantially the same cross-sectional shape as the vertical sectional shape of said fasteners along the longitudinal direction of the rod, and slitting means for slitting said continuous molded plastic rod in a direction perpendicular to the longitudinal direction thereof at predetermined intervals in a manner such that a part of the cross-section of the bar section is not cut in the continuous molded plastic rod, wherein said feeding means and said slitting means are synchronously operated to divide said continuous molded plastic rod into a plurality of fasteners.
2. Apparatus as claimed in claim 1, wherein said feeding means repeats the operation of feeding the conti-nuous molded plastic rod to the slitting means intermit-tently by a predetermined distance at a time and the operation of stopping the intermittent feeding of the conti-nuous molded plastic rod, and said slitting means slits the continuous molded plastic rod while the continuous molded plastic rod is stopped.
3. Apparatus as claimed in claim 1, wherein drawing means is disposed following said slitting means to draw the string sections of fasteners divided by the slitting operation of said slitting means in the longitudinal direction thereof.
4. Apparatus as claimed in claim 3, wherein said drawing means comprises stationary rods supporting thereon bar sections of the divided fasteners and movable rods which are engaged with the head sections of the divided fasteners and are moved to gradually separate from the stationary rods.
5. Apparatus as claimed in claim 1, 2 or 3, wherein said slitting means comprises at least one guide means having a guide hole having substantially the same sectional shape as the cross-sectional shape of the continuous molded plastic rod and a cutter having a hole including an inner blade, which is perforated to have substantially the same shape as that of the guide hole, said cutter making a rotary movement with the center of the portion, corresponding to the bar section, of said inner blade of the hole being substantially as the center of rotation.
6. Apparatus as claimed in claim 1, 2 or 3, wherein said slitting means comprises guide means having a guide hole having substantially the same shape as the cross-sectional shape of the continuous molded plastic rod and a cutter including an outer blade traversing the side face of said guide hole except a part thereof corresponding to the bar section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000386614A CA1168032A (en) | 1981-09-24 | 1981-09-24 | Apparatus for producing fasteners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000386614A CA1168032A (en) | 1981-09-24 | 1981-09-24 | Apparatus for producing fasteners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1168032A true CA1168032A (en) | 1984-05-29 |
Family
ID=4121022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386614A Expired CA1168032A (en) | 1981-09-24 | 1981-09-24 | Apparatus for producing fasteners |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1168032A (en) |
-
1981
- 1981-09-24 CA CA000386614A patent/CA1168032A/en not_active Expired
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| Date | Code | Title | Description |
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| MKEX | Expiry |