CN112644027B - Bottom stop forming device and bottom stop forming method for slide fastener - Google Patents

Bottom stop forming device and bottom stop forming method for slide fastener Download PDF

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Publication number
CN112644027B
CN112644027B CN201910956852.0A CN201910956852A CN112644027B CN 112644027 B CN112644027 B CN 112644027B CN 201910956852 A CN201910956852 A CN 201910956852A CN 112644027 B CN112644027 B CN 112644027B
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China
Prior art keywords
horn
spiral
chain
slide fastener
vibrator
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CN201910956852.0A
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Chinese (zh)
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CN112644027A (en
Inventor
石川纪一郞
久久凑峰也
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YKK Corp
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YKK Corp
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Priority to CN201910956852.0A priority Critical patent/CN112644027B/en
Priority to TW108146082A priority patent/TWI785293B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/081—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations having a component of vibration not perpendicular to the welding surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2005/00—Elements of slide fasteners

Abstract

The invention provides a bottom stop forming device and a bottom stop forming method for a slide fastener, which can efficiently form a bottom stop by ultrasonic welding and has good appearance performance on the back side of the slide fastener. The bottom stop forming device comprises: a horn (33) that transmits ultrasonic vibration from the vibrator (32) and that has a contact surface (35 a) that contacts the welded portion (6 a) of the spiral fastener element (3); a moving mechanism (40) that supports the horn (33) and the vibrator (32), and that can move the horn (33) and the vibrator (32) so as to press the contact surface (35 a) of the horn (33) against the welded portion (6 a) of the spiral fastener element (3); and a chain support table (20) that supports the continuous chain (1) such that the welded portion (6 a) of the spiral element (3) is disposed below the welding head (33). The horn (33) is ultrasonically vibrated in a direction including a longitudinal component of the continuous chain (1).

Description

Bottom stop forming device and bottom stop forming method for slide fastener
Technical Field
The present invention relates to a bottom end stop forming apparatus and a bottom end stop forming method for a slide fastener.
Background
Patent document 1 describes a method for forming a bottom stop of a slide fastener, which has excellent fixing strength and high processing efficiency, as follows: the plurality of elements are fused and fixed by ultrasonic waves in a state where the frictional resistance of the contact surfaces of the elements is increased by pressing the coupling heads of the plurality of elements at the distal end portions of the coupling element rows against each other.
Documents of the prior art
Patent document
Patent document 1: japanese examined patent publication No. 56-028523
Disclosure of Invention
Problems to be solved by the invention
In addition, in the conventional bottom stop forming method by ultrasonic waves, the fastener elements are generally welded by a horn that vibrates in the vertical direction, but there is a case where the edges of a pair of fastener tapes facing each other on the back side of the fastener (the side opposite to the side where the fastener tape and the fastener elements are located) are opened to each other, and a gap is formed between the edges of the fastener tapes, which deteriorates the appearance performance. In particular, in recent years, the use of spiral elements as so-called back surfaces on the inner surface side of a fastener tape product has increased, and it is desired to form a bottom stop in a state where the edges of the fastener tape are closely adhered to each other.
The method for forming the bottom stop of the slide fastener described in patent document 1 is not described about the direction of the ultrasonic vibration.
As a method for forming such a bottom end having excellent appearance, a method for forming a bottom end by melting and fixing a spiral element using a heater is conceivable, but a lot of time is required until welding, which causes a problem in work efficiency.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a bottom end stop forming apparatus and a bottom end stop forming method for a slide fastener, which can efficiently form a bottom end stop by ultrasonic welding and which can improve the appearance of the back surface side of the slide fastener.
Means for solving the problems
The above object of the present invention is achieved by the following structure.
(1) A bottom stop forming device of a slide fastener, which forms a bottom stop by ultrasonic welding to a spiral element of a spiral chain, wherein the bottom stop forming device comprises:
a vibrator that outputs ultrasonic vibration;
a bonding tool having a contact surface that is in contact with a portion to be welded of the spiral fastener element, and that transmits vibration from the vibrator;
a moving mechanism that supports the horn and the vibrator and moves the horn and the vibrator so as to press a contact surface of the horn against a welded portion of the spiral fastener element; and
a chain support table for supporting the spiral chain so that a welded portion of the spiral element is disposed below the welding head,
the horn ultrasonically vibrates in a direction that includes a longitudinal component of the helical chain.
(2) A method of forming a bottom end of a slide fastener by ultrasonic welding of spiral elements of a spiral chain using the bottom end forming apparatus of a slide fastener according to (1), comprising:
a first step 1 of placing the spiral chain on a chain support base so that a welded portion of the spiral element is positioned below a welding head;
a 2 nd step of, after pressing the horn against the spiral element, ultrasonically vibrating the horn in a direction including a longitudinal component of the spiral chain to weld the spiral element; and
and a 3 rd step of retracting the horn from the spiral chain in the 3 rd step.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the bottom stop forming apparatus and the bottom stop forming method of the slide fastener of the present invention, the bottom stop can be efficiently formed by ultrasonic welding, and good appearance performance can be imparted to the back surface side of the slide fastener.
Drawings
Fig. 1 is a side view of a slide fastener bottom end stop forming apparatus according to embodiment 1 of the present invention.
Fig. 2 is an enlarged perspective view of a main portion of the bottom stop forming device of the slide fastener shown in fig. 1.
Fig. 3 is a plan view of the slide fastener with the bottom stop formed as viewed from the front surface side.
Fig. 4 is a sectional view IV-IV of fig. 3.
Fig. 5 is an enlarged perspective view of the tip end portion of the horn shown in fig. 2.
Fig. 6 is a cross-sectional view VI-VI of fig. 2.
Fig. 7 (a) is a back view of a slide fastener in which a bottom stop is formed by a conventional ultrasonic bottom stop forming apparatus, and fig. 7 (b) is a back view of a slide fastener in which a bottom stop is formed by a bottom stop forming apparatus of a slide fastener of the present invention.
Fig. 8 is a side view of a bottom end stop forming apparatus of a slide fastener according to embodiment 2 of the present invention.
Fig. 9 (a) is an enlarged perspective view of the tip end portion of the horn shown in fig. 8, fig. 9 (b) is a side view, and fig. 9 (c) is a front view.
Fig. 10 (a) is an enlarged perspective view of a 1 st modification of the tip end portion of the horn used in embodiment 2, fig. 10 (b) is a side view, and fig. 10 (c) is a front view.
Fig. 11 (a) is an enlarged perspective view of a 2 nd modification of the tip portion of the horn used in embodiment 2, fig. 11 (b) is a side view, and fig. 11 (c) is a front view.
Description of the reference numerals
1. Continuous chains (helical chains); 1a, the lower surface of the continuous chain (spiral chain); 3. a helical fastener element; 6. stopping; 6a, a welded portion; 10. 10A, a lower stop forming device of the zipper; 13. a guide roller; 20. a chain support table; 21. a lower surface support portion; 22. an upper surface support; 24. an anvil block; 25. an opening part; 26. an inclined surface; 32. a vibrator; 33. 33A, 33B, 33C, a horn; 34b, a tip end portion; 35. a protrusion; 35a, a contact surface; 35b, a notch; 40. a moving mechanism; C. a gap.
Detailed Description
Hereinafter, each embodiment of a slide fastener bottom end stop forming apparatus suitable for applying the slide fastener bottom end stop forming method of the present invention will be described in detail with reference to the drawings.
In the following description, the lower stopper forming device is configured such that the upper side in fig. 1 and 8 is the upper side and the lower side is the lower side with respect to the vertical direction. In the left-right direction, when viewed from the upstream side in the conveying direction of the spiral chain, the right side (the front side in the paper surface of fig. 1 and 8, and the right side of fig. 6) is set to the right, the left side (the back side in the paper surface of fig. 1 and 8, and the left side of fig. 6) is set to the left, and in the front-back direction, the upstream side in the conveying direction of the spiral chain (the left side in fig. 1 and 8) is set to the front side, and the downstream side in the conveying direction (the right side in fig. 1 and 8) is set to the rear side. In the slide fastener, the front side is a side to which the fastener elements are attached to the fastener tape, and the back side is a side to which the fastener elements are not attached.
(embodiment 1)
As shown in fig. 1 and 2, a slide fastener bottom end stop forming apparatus 10 of the present embodiment includes: a chain support table 20 fixed to the base 11 and supporting the continuous chain 1; an ultrasonic fusion splicer 30; and a moving mechanism 40 which is disposed on a mechanism base 12 fixed to the base 11 and moves the ultrasonic fusion splicer 30 in the vertical direction. The bottom end forming device 10 forms the bottom end 6 by ultrasonically welding the spiral elements 3 of the continuous chain 1 supported by the chain support base 20.
Referring to fig. 3, 4 and 6, the continuous chain 1 includes: a pair of continuous fastener tapes 2; and a pair of spiral elements 3 provided along the opposing tape side edge portions 2a of the pair of continuous fastener tapes 2, respectively. The spiral element 3 is formed by winding a monofilament of polyamide or polyester in a spiral shape, for example, and has a core thread 4 inserted therein and is fixed to the surface of the continuous fastener tape 2 along the tape side edge portion 2a by sewing with a sewing thread 5. The portions to be welded 6a of the pair of spiral elements 3 that mesh with each other are welded by the ultrasonic welding machine 30, thereby forming the bottom stoppers 6.
Returning to fig. 1 and 2, in the bottom end forming device 10, there are provided, in order on the downstream side of the chain support table 20: a pair of guide rollers 13 for guiding the continuous chain 1, which is horizontally fed out from the chain support base 20 with the bottom stoppers 6 formed thereon, in the vertical direction by penetrating the continuous chain 1 through a through hole 11a provided in the base 11; and a driving roller 14 and a driven roller 15 that nip the continuous chain 1.
The chain support table 20 includes a lower surface support portion 21 and an upper surface support portion 22 fixed to the lower surface support portion 21. The lower surface support portion 21 is fixed to the base 11 via a receiving table 23. Referring to fig. 6, an anvil 24 for supporting the lower surface (back surface) 1a of the continuous chain 1 is formed on the upper surface of the lower surface support portion 21. The upper surface 24a of the anvil 24 is a horizontal surface, and inclined portions (japanese: 12486125409712540). The anvil 24 cooperates with the horn 33 to grip the continuous chain 1.
In the present embodiment, the anvil 24 and the lower surface support portion 21 are integrally formed, but the anvil 24 and the lower surface support portion 21 may be formed of different members and may be fixed by a bolt or the like.
The upper surface support portion 22 has an opening 25 that exposes the screw element 3 upward at least at the stopper forming position WP. The lower surface of the upper surface support portion 22 is an inclined surface 26 that gradually inclines downward toward the left-right direction. The upper surface support portion 22 has a through hole 27 formed at a position upstream of the opening 25 in the conveying direction of the continuous chain 1. A sensing roller 29 rotatably supported by a roller support 28 is inserted into the through hole 27.
The sensing roller 29 abuts on the continuous chain 1, and the sensing roller 29 enters a not-shown space portion to sense the space portion as the continuous chain 1 is conveyed. When the sensing roller 29 senses the space, the driving roller 14 is driven to transport the continuous chain 1 by a predetermined distance and then stops, and the welded portion 6a of the continuous chain 1 is stopped at the bottom stop forming position WP.
The ultrasonic welding machine 30 includes an oscillator, a vibrator 32, and a horn 33, not shown, provided outside, and converts electric energy into mechanical energy to ultrasonically vibrate the horn 33, and applies pressure to the spiral element 3 by the horn 33 to generate frictional heat in the spiral element 3 to weld the welded portion 6a. The oscillator converts an electrical signal of a low frequency (e.g., 50/60 Hz) into an electrical signal of a high frequency (e.g., 20 kHz). The high-frequency electric signal amplified by the oscillator is transmitted to the transducer 32 such as a piezoelectric element and converted into mechanical vibration energy, and the transducer 32 outputs ultrasonic vibration. The ultrasonic vibration is further transmitted to the screw element 3 via the horn 33, and the screw element 3 is welded by frictional heat. The ultrasonic fusion splicer 30 ultrasonically vibrates in a direction along the center axis CL of the transducer 32 and the horn 33.
The ultrasonic fusion splicer 30 is supported by the moving mechanism 40 in parallel with (in the present embodiment, horizontally) the longitudinal direction of the continuous chain 1 horizontally supported by the chain support base 20. That is, the horn 33 ultrasonically vibrates in a direction including at least a longitudinal direction component of the continuous chain 1 conveyed from the front side to the rear side between the upper surface supporting portion 22 and the lower surface supporting portion 21, specifically, in the horizontal direction in the present embodiment.
The horn 33 is made of, for example, an aluminum alloy or a titanium alloy, and its cross-sectional shape smoothly changes from a base portion 34a having a substantially circular cross-section toward a tip portion 34b having a substantially rectangular cross-section. As shown in fig. 5, substantially rectangular parallelepiped projecting portions 35 are integrally formed on the upper and lower portions of the tip end portion 34b so as to project in the radial direction, respectively. The upper and lower surfaces of the protruding portion 35 are flat surfaces formed parallel to the central axis CL of the vibrator 32 and the horn 33, and constitute a contact surface 35a that contacts the spiral element 3 when the bottom end is formed.
The surface of the contact surface 35a is formed into a concave-convex shape by knurling or the like, for example. This improves the frictional force between the contact surface 35a and the spiral element 3, and facilitates welding of the spiral element 3. Further, L-shaped notches 35b having substantially quarter-circle corners are formed at both ends of the protruding portion 35 in the front-rear direction. The function of the notch 35b will be described later in detail.
Further, by providing a plurality of projections 35 in the horn 33, for example, in the case where one projection 35 is damaged, the life of the expensive horn 33 can be extended by using the other projection 35. Further, by making the shape of each projection 35 different, it is possible to correspond to a plurality of bottom stoppers 6 having different specifications with 1 horn 33.
The moving mechanism 40 supports the ultrasonic fusion splicer 30 so as to be movable up and down. Specifically, the moving mechanism 40 includes a linear guide 41 vertically fixed to the mechanism base 12, and the movable base 42 is disposed to be movable in the vertical direction while being guided by the linear guide 41. The movable table 42 is connected to a piston rod 44 of a cylinder 43 fixed to an upper portion of the mechanism table 12. Thereby, the movable table 42 guided by the linear guide 41 is moved in the vertical direction by the operation of the air cylinder 43.
A support 46 for horizontally supporting the ultrasonic fusion splicer 30 is fixed to the movable table 42. The support portion 46 has a circular hole, not shown, fitted to the vibrator 32 and a slit 46a communicating with the circular hole. The vibrator 32 is fitted into the circular hole, and the vibrator 32 is fixed to the support portion 46 by narrowing the interval of the slits 46a with bolts not shown.
Thereby, the ultrasonic fusion splicer 30 can be fixed at an arbitrary position and phase with respect to the support portion 46. That is, the projection 35 of the horn 33 is positioned above the opening 25 serving as the bottom stop forming position WP, and the contact surface 35a is fixed so as to be parallel to the continuous chain 1 supported by the chain support base 20. In other words, the vibrator 32 and the horn 33 are supported by the moving mechanism 40 so as to be horizontally aligned along the longitudinal direction of the continuous chain 1. Further, a stopper 47 capable of adjusting the height is provided on the mechanism base 12, and the stopper 47 abuts on the lower surface 46b of the support portion 46 to determine the position of the movable base 42 when the bottom stop is formed.
The bottom stop formation by the bottom stop forming apparatus 10 having such a structure is performed by the following steps.
First, the continuous chain 1 is inserted between the lower surface support portion 21 and the upper surface support portion 22 of the chain support base 20 with the pair of spiral elements 3 engaged with each other facing upward, further inserted through the through hole 11a of the base 11, then guided downward by the pair of guide rollers 13, and set between the drive roller 14 and the driven roller 15.
As a result, as shown in fig. 6, the lower surface (back surface) 1a of the continuous chain 1 is supported by the anvil 24, and the spiral element 3 is exposed upward from the opening 25 of the upper surface support portion 22. The continuous chain 1 is set in a state where the left and right side surfaces of the spiral element 3 are guided by the side walls 25a of the opening 25.
Further, the left and right sides of the pair of fastener tapes 2 of the continuous chain 1 set on the chain support base 20 are bent downward along the inclined surface 26 of the upper surface support portion 22, and the sewing thread 5 for sewing the spiral element 3 can be separated from the protruding portion 35 of the horn 33.
Next, the drive roller 14 is driven to convey the continuous chain 1. After that, when the sensing roller 29 senses the space portion where the plurality of spiral coupling elements 3 are continuously removed from the continuous chain 1, the driving roller 14 is driven to further convey the continuous chain 1 by a predetermined distance, and then the driving roller 14 is stopped. Thus, the welded part 6a on the upstream side as the spacer part is located at the bottom stop forming position WP in the continuous chain 1.
Here, the moving mechanism 40 operates the air cylinder 43, moves the movable table 42 guided by the linear guide 41 downward together with the ultrasonic fusion splicer 30, and sandwiches the welded portion 6a of the screw element 3 located at the bottom stop forming position WP with the contact surface 35a of the anvil 24 and the horn 33. The distance between the anvil 24 and the contact surface 35a, that is, the pressing amount of the horn 33 pressing the spiral element 3 can be changed by adjusting the height of the stopper 47.
After the spiral element 3 is pressed by the horn 33, the oscillator 32 is oscillated, and the horn 33 is ultrasonically vibrated in a direction including a longitudinal component of the continuous chain 1, that is, in the horizontal direction in the present embodiment. Thereby, the welded portion 6a of the spiral element 3, which is in contact with the contact surface 35a of the horn 33, is melted by frictional heat. Since the contact surface 35a is formed into a concave-convex shape by knurling or the like, the frictional heat generated is large, and the spiral element 3 can be efficiently melted.
Since the heating portion of the spiral element 3 by the ultrasonic vibration is mainly limited to the contact portion (welded portion 6 a) with the contact surface 35a of the horn 33, the welded portion 6a of the spiral element 3 is cooled immediately after the oscillation of the vibrator 32 is stopped, and welded in a short time. Further, since the contact surface 35a of the horn 33 vibrates in the longitudinal direction (horizontal direction) of the fastener element 3, the fastener tape 2 is less affected, and the pair of tape side edge portions 2a are welded in a state of close contact without being opened.
At this time, a part of the molten resin of the spiral element 3 melted by the frictional heat with the contact surface 35a may overflow forward and backward from both end portions in the front-rear direction of the contact surface 35a and solidify, and protrude from the surface of the bottom stop 6 to become a burr. This burr is a factor of deteriorating the hand. However, since the horn 33 of the present embodiment has the notches 35b formed at both longitudinal direction end portions of the protruding portion 35, a part of the molten resin, i.e., burrs, which overflow from both longitudinal direction end portions of the contact surface 35a are crushed by the notches 35b to be shaped, and the feel of the bottom stop 6 is improved.
When the bottom stop 6 is formed on the continuous chain 1, the air cylinder 43 is operated, and the ultrasonic welding machine 30 moves upward together with the movable table 42 and retreats from the continuous chain 1. Then, the driving roller 14 starts driving again, and the continuous chain 1 is conveyed until the next welded portion 6a is located at the lower stop forming position WP (until the sensing roller 29 senses the next space portion and conveys a predetermined distance). Thereafter, the same operation is repeated to continuously form the bottom stopper 6.
Fig. 7 is a diagram showing a comparison of the shapes of the back surfaces of the spiral chains in which the bottom stops are formed by the conventional bottom stop forming apparatus and the bottom stop forming apparatus according to the present embodiment. As shown in fig. 7 (a), the back surface of the spiral chain 1 having the bottom stop formed by the conventional bottom stop forming apparatus may be as follows: the tape side edge portions 2a of the pair of fastener tapes 2 are opened from each other, and a part of the bottom stop 6 is exposed from the gap of the tape side edge portions 2a, which deteriorates appearance performance. On the other hand, as shown in fig. 7 (b), since the back surface of the continuous chain 1 having the bottom stop 6 formed by the bottom stop forming device 10 of the present embodiment is welded in a state where the tape side edge portions 2a of the pair of fastener tapes 2 are closely adhered to each other, the bottom stop 6 is not visible, and the continuous chain 1 having excellent appearance performance can be obtained.
(embodiment 2)
The bottom end forming device 10A according to embodiment 2 is arranged such that the ultrasonic fusion splicer 30 is inclined at an angle θ with respect to the continuous chain 1 horizontally placed on the chain support base 20. That is, the contact surface 35a of the horn 33A causes the ultrasonic vibration to act on the spiral element 3 from a direction inclined by an angle θ with respect to the continuous chain 1. Therefore, in the present embodiment, the horn 33A ultrasonically vibrates in an oblique direction that is a composite component including a longitudinal direction component of the continuous chain 1 conveyed from the front side to the rear side between the upper surface supporting portion 22 and the lower surface supporting portion 21 and a vertical direction component perpendicular to the longitudinal direction component. Further, the continuous chain 1 that is delivered from the chain support table 20 after the bottom end is formed is conveyed in the horizontal direction.
Since other configurations and operations are the same as those of the bottom stop forming apparatus 10 according to embodiment 1, different portions will be mainly described below, and the same reference numerals are given to the same portions and corresponding portions, thereby simplifying or omitting the detailed description.
As shown in fig. 8, the supporting portion 46 that supports the ultrasonic fusion splicer 30 is fixed to the movable stand 42 in a state of being inclined by an angle θ counterclockwise in the drawing with respect to the vertical direction so that the horn 33A is positioned below the transducer 32. Thereby, the center axis CL of the ultrasonic fusion splicer 30 is inclined at an angle θ from the horizontal.
Referring to fig. 9, the horn 33A of the present embodiment has 1 projection 35 at the tip end portion 34b, and the contact surface 35a of the projection 35 is formed at an inclination angle θ with respect to the center axis CL of the ultrasonic fusion splicer 30. Therefore, when the ultrasonic fusion splicer 30 is attached to the bottom end forming device 10A at the inclination angle θ, the contact surface 35a faces in the horizontal direction, and the entire surface of the contact surface 35a contacts the continuous chain 1 horizontally placed on the chain support base 20.
The ultrasonic fusion splicer 30 performs ultrasonic vibration in the direction of the center axis CL, and therefore the ultrasonic vibration acts on the spiral element 3 in the horizontal direction and the vertical direction.
Thus, when the bottom stop 6 is formed, ultrasonic vibration in the horizontal direction is applied to the spiral element 3 to improve the appearance performance, and ultrasonic vibration in the vertical direction is applied to improve the welding strength of the bottom stop 6, whereby the bottom stop 6 having a balance between the appearance performance and the welding strength can be formed.
Further, the continuous chain 1 that is fed out from the chain support base 20 after the bottom end is formed is conveyed in the horizontal direction directly from the position of the chain support base 20 below the horn 33A and the vibrator 32 in a state where the contact surface 35a is in contact with the welded portion 6a of the continuous chain 1. Therefore, the conveying mechanism for conveying the continuous chain 1 can be configured more easily than in embodiment 1.
(modification 1)
As shown in fig. 10, the horn 33B of modification 1 is provided with two protrusions 35 at the tip end portion 34B in a phase different by 180 °. The contact surfaces 35a of the protruding portions 35 are formed at respective inclination angles θ with respect to the central axis CL of the ultrasonic fusion splicer 30. Thus, if two projections 35 are formed in the same shape, the life of the horn 33B can be extended by using one projection 35 as a preliminary in the unlikely event. Further, if the two projections 35 are formed in different shapes, 1 horn 33B can correspond to the bottom stoppers 6 having different specifications.
(modification 2)
As shown in fig. 11, the horn 33C of modification 2 is provided with 4 protruding portions 35 at 90 ° intervals in the circumferential direction at the tip end portion 34 b. The contact surfaces 35a of the respective protrusions 35 are formed at respective inclination angles θ with respect to the central axis CL of the ultrasonic fusion splicer 30. According to the horn 33C of modification 2 including 4 protrusions 35, the life of the horn 33C can be further extended, and the lower stopper 6 of a plurality of specifications can be more flexibly accommodated.
In the horns 33B and 33C, the attachment intervals of the protruding portions 35 in the circumferential direction are not limited to equal intervals.
The notch 35b according to embodiment 1 can be applied to the bonding tools 33A to 33C according to embodiment 2.
The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the scope of the present invention. For example, the notch 35b formed in the projection 35 is not limited to the bottom stop forming device in which the horn 33 vibrates in the lateral direction, and is also effective for a bottom stop forming device in which the horn vibrates in the vertical direction.
As described above, the following matters are disclosed in the present specification.
(1) A bottom stop forming device of a slide fastener, which forms a bottom stop by ultrasonic welding to a spiral element of a spiral chain, wherein the bottom stop forming device comprises:
a vibrator that outputs ultrasonic vibration;
a bonding tool having a contact surface that is in contact with a portion to be welded of the spiral fastener element, and that transmits vibration from the vibrator;
a moving mechanism that supports the horn and the vibrator and can move the horn and the vibrator so as to press a contact surface of the horn against a welded portion of the fastener element; and
a chain support table that supports the spiral chain such that a welded portion of the spiral element is disposed below the horn,
the horn ultrasonically vibrates in a direction including a length-direction component of the spiral chain.
According to this structure, the bottom stop can be efficiently formed by ultrasonic welding, and good appearance performance can be imparted to the back surface side of the slide fastener.
(2) The lower stop forming device of a slide fastener according to (1),
the tip end portion of the horn is provided with a protruding portion, and the contact surface of the protruding portion with the spiral element is formed in a concave-convex shape.
According to this configuration, the spiral element can be welded in a short time by efficiently generating frictional heat.
(3) The lower stop forming device of a slide fastener according to (1) or (2), wherein,
the welding head has a notch on at least one side in the length direction of the spiral chain relative to the contact surface.
According to this configuration, the burrs formed by the molten resin overflowing from the front and rear direction end portions of the contact surface are crushed and shaped by the notches, and the feel of the bottom end can be improved.
(4) The lower stop forming apparatus of a slide fastener according to any one of (1) to (3),
the welding head includes a plurality of projections formed in a circumferential direction and each having a contact surface that contacts the spiral element.
According to this configuration, the projection can be easily replaced and welded, and the welding apparatus can be adapted to the size and the specification of a plurality of bottom stoppers. In addition, in the case of the protruding portions having the same shape, even if one protruding portion is broken by chance, it is possible to immediately switch to another protruding portion, and it is possible to extend the life of the expensive horn.
(5) The lower stop forming apparatus of a slide fastener according to any one of (1) to (4),
the horn and the vibrator are supported by the moving mechanism so as to be horizontally arranged along the longitudinal direction of the spiral chain,
the horn ultrasonically vibrates along a length direction of the spiral coupling element.
According to this configuration, the spiral chain is brought into parallel contact with the horn that performs ultrasonic vibration to weld the spiral element, and the bottom stopper having excellent appearance performance can be formed.
(6) The lower stop forming device of a slide fastener according to (5), wherein,
a guide roller for vertically conveying the spiral chain conveyed in the horizontal direction is provided on the downstream side of the chain support table.
According to this configuration, the screw chain having the bottom stopper formed thereon can be guided downward from the chain support base, and the screw chain can be conveyed without interfering with other members.
(7) The lower stop forming apparatus of a slide fastener according to any one of (1) to (4),
the horn and the vibrator are supported by the moving mechanism in an inclined manner so that the horn is positioned below the vibrator,
the horn ultrasonically vibrates in the oblique direction toward the welded portion of the spiral element.
According to this configuration, the spiral chain is welded from an oblique direction by the horn that performs ultrasonic vibration, and the bottom end having excellent appearance performance and high welding strength can be formed.
(8) The lower stop forming device of a slide fastener according to (7), wherein,
the screw chain delivered from the chain support table is conveyed in a horizontal direction below the horn and the vibrator in a state where the contact surface is in contact with the welded portion of the screw chain.
According to this configuration, the spiral chain having the bottom end formed thereon can be conveyed in the horizontal direction from the chain support table by the relatively simple configuration of the conveying mechanism without interfering with other members.
(9) The lower stop forming apparatus of a slide fastener according to any one of (1) to (8),
the chain support table includes:
a lower surface support portion having an anvil that supports a lower surface of the spiral chain so as to sandwich the spiral chain in cooperation with the horn; and
an upper surface support portion having an opening portion for exposing the screw element upward, the upper surface support portion being fixed to the lower surface support portion with a predetermined gap therebetween,
the lower surface of the upper surface support portion has an inclined surface that gradually inclines downward toward the outside in the width direction.
According to this configuration, the sewing thread for sewing the spiral element can be separated from the protruding portion of the horn, and the bottom end can be formed more reliably.
(10) A method of forming a bottom end stop of a slide fastener by ultrasonic welding to a spiral element of a spiral chain using the apparatus for forming a bottom end stop of a slide fastener according to any one of (1) to (9), the method comprising:
a first step 1 of setting the spiral chain on the chain support base so that a welded portion of the spiral element is positioned below the welding head;
a 2 nd step of, after the horn is pressed against the spiral element, ultrasonically vibrating the horn in a direction including a longitudinal component of the spiral chain to weld the spiral element; and
and a 3 rd step of retracting the welding head from the spiral chain in the 3 rd step.
According to this structure, the bottom stop can be efficiently formed by ultrasonic welding, and good appearance performance can be imparted to the back surface side of the slide fastener.
(11) The method of forming a bottom end stop of a slide fastener according to (10), wherein,
the horn and the vibrator are supported by the moving mechanism so as to be horizontally arranged along the longitudinal direction of the spiral chain,
the horn ultrasonically vibrates along a length direction of the spiral coupling element.
According to this configuration, the spiral chain is brought into parallel contact with the horn that performs ultrasonic vibration to weld the spiral element, and the bottom end having excellent appearance performance can be formed.
(12) The method of forming a bottom end stop of a slide fastener according to (10), wherein,
the horn and the vibrator are supported by the moving mechanism in an inclined manner so that the horn is positioned below the vibrator,
the horn ultrasonically vibrates in the oblique direction toward the welded portion of the spiral element.
According to this configuration, the spiral chain is welded from an oblique direction by the horn that performs ultrasonic vibration, and the bottom end having excellent appearance performance and high welding strength can be formed.

Claims (12)

1. A bottom end forming device (10) for a slide fastener, which forms a bottom end (6) by ultrasonic welding to a spiral element (3) of a spiral chain (1), comprises:
a vibrator (32) that outputs ultrasonic vibration;
a bonding tool (33) which transmits vibration from the vibrator and has a contact surface (35 a) that contacts the welded portion (6 a) of the spiral fastener element;
a moving mechanism (40) that supports the horn and the vibrator and can move the horn and the vibrator so as to press a contact surface of the horn against a welded portion of the fastener element; and
a chain support table (20) that supports the spiral chain such that a welded portion of the spiral element is disposed below the horn,
the horn is ultrasonically vibrated in a direction that includes a length-direction component of the helical chain.
2. The lower stop forming apparatus of a slide fastener according to claim 1,
the tip end (34 b) of the horn (33) is provided with a protruding portion (35), and the contact surface (35 a) of the protruding portion (35) that contacts the spiral element (3) is formed in a concavo-convex shape.
3. The lower stop forming apparatus of a slide fastener according to claim 1 or 2,
the welding head (33) has a notch (35 b) on at least one side of the contact surface (35 a) in the longitudinal direction of the spiral chain (1).
4. The lower stop forming apparatus of a slide fastener according to claim 1 or 2,
the weld head (33) is provided with a plurality of protrusions (35) which are formed along the circumferential direction of the weld head (33) and each of which has a contact surface (35 a) that contacts the spiral element (3).
5. The lower stop forming apparatus of a slide fastener according to claim 1 or 2,
the welding head (33) and the vibrator (32) are supported by the moving mechanism (40) so as to be horizontally arranged along the longitudinal direction of the spiral chain (1),
the horn ultrasonically vibrates along the longitudinal direction of the spiral element (3).
6. The lower stop forming apparatus of a slide fastener according to claim 5,
a guide roller (13) for vertically conveying the spiral chain (1) conveyed in the horizontal direction is provided on the downstream side of the chain support table (20).
7. The lower stop forming apparatus of a slide fastener according to claim 1 or 2,
the horn (33) and the vibrator (32) are supported by the moving mechanism (40) in an inclined manner such that the horn is located below the vibrator,
the horn ultrasonically vibrates in the oblique direction toward a welded portion (6 a) of the spiral element (3).
8. The lower stop forming apparatus of a slide fastener according to claim 7,
the screw chain (1) that is output from the chain support table (20) is conveyed in the horizontal direction below the horn (33) and the vibrator (32) in a state where the contact surface (35 a) is in contact with the welded portion (6 a) of the screw chain.
9. The lower stop forming apparatus of a slide fastener according to claim 1 or 2,
the chain support table (20) comprises:
a lower surface support part (21) having an anvil (24) that supports a lower surface (1 a) of the spiral chain (1) so as to sandwich the spiral chain (1) in cooperation with the horn (33); and
an upper surface support part (22) having an opening (25) for exposing the spiral element (3) upward, and fixed to the lower surface support part with a predetermined gap (C) therebetween,
the lower surface of the upper surface support part is provided with an inclined surface (26) which gradually inclines downwards towards the outside in the width direction.
10. A method of forming a bottom end stop (6) of a slide fastener by ultrasonic welding to a spiral element (3) of a spiral link (1) using the bottom end stop forming apparatus (10) of a slide fastener according to any one of claims 1 to 9, the method comprising:
a first step 1 of setting the spiral chain on the chain support base 20 so that a welded portion 6a of the spiral element is positioned below the horn 33;
a 2 nd step of, after pressing the welding head (33) against the spiral element, ultrasonically vibrating the welding head in a direction including a longitudinal component of the spiral chain to weld the spiral element; and
and a 3 rd step of retracting the welding head from the spiral chain in the 3 rd step.
11. The method of forming a lower stop of a slide fastener according to claim 10,
the welding head (33) and the vibrator (32) are supported by the moving mechanism (40) so as to be horizontally arranged along the longitudinal direction of the spiral chain (1),
the horn ultrasonically vibrates along the longitudinal direction of the spiral element (3).
12. The method of forming a lower stop of a slide fastener according to claim 10,
the horn (33) and the vibrator (32) are supported by the moving mechanism (40) in an inclined manner such that the horn is located below the vibrator,
the horn ultrasonically vibrates in the oblique direction toward a welded portion (6 a) of the spiral element (3).
CN201910956852.0A 2019-10-10 2019-10-10 Bottom stop forming device and bottom stop forming method for slide fastener Active CN112644027B (en)

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CN105228482A (en) * 2014-03-31 2016-01-06 Ykk株式会社 CONCEAL ZIPPER and lower stop member building mortion
CN208339050U (en) * 2018-06-06 2019-01-08 温州市金龙拉链机械有限公司 Full-automatic double lower only machines

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