GB2184540A - Apparatus for inspecting slide fastener sliders - Google Patents
Apparatus for inspecting slide fastener sliders Download PDFInfo
- Publication number
- GB2184540A GB2184540A GB08629623A GB8629623A GB2184540A GB 2184540 A GB2184540 A GB 2184540A GB 08629623 A GB08629623 A GB 08629623A GB 8629623 A GB8629623 A GB 8629623A GB 2184540 A GB2184540 A GB 2184540A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slider
- sliders
- sensor lever
- pull tab
- support block
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/42—Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/46—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples
- B21D53/50—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts
Abstract
An apparatus for inspecting automatic lock sliders (30) for slide fasteners comprises a retainer member (4) supported by a vertically movable support block (3) for retaining one slider (30) at a time on a table (1), a pressure rod (5) supported by the support block (3) for pressing a pull tab (32) of the slider (30) downwardly, a sensor lever (6) pivotally mounted on the retainer member (4) and having a sensing projection (7) for contacting the pull tab (32) so that the sensor lever (6) is pivotally movable in response to the pivotal movement of the pull tab (32), a pair of upper and lower detectors (21), (22) of non-contact type disposed within a range of the vertical movement of a free end of the sensor lever (6), and a discrimination circuit for receiving electrical signals from the detectors (21), (22) to discriminate between normal and inferior sliders. <IMAGE>
Description
SPECIFICATION
Apparatus for inspecting slide fastener sliders
The present invention relates to the production of slide fasteners, and more particularly to an apparatus for inspecting automatic lock sliders for slide fasteners.
Automatic lock sliders for slide fasteners generally include a leaf spring which is supported on an upper wing of a slider body to normally urge a locking membertoprojectintoacoupling-elementguide channel inthesliderbodyforpreventingtheslider from moving on a pair of coupling element rows of the slide fastener. A pull tab is operatively connected to the locking member for retracting the Iatterfrom the guide channel againstthe bias of the spring. For smooth and reliable locking and unlocking operation of the slider, the degree of resilience of the spring must be within a required range. In assembly,the pull tab, the locking member, the spring and a cover are mounted on the slider body one after another in this order.The manufacture of such sliders is often subjectto inferior sliders due to the change of quality of the individual parts and the change ofthe assembling condition.
Japanese Patent No. 1,273,103 (Japanese Patent
Publication No. 59-5181 1 ) discloses a slider inspecting apparatus for efficiently detecting and removing inferiorslidersatthefinal stage of the production. In the known apparatus, the amountof resilience of a spring acting on a locking member of the individual slider is sensed in terms of angular movement of a pivoted pointer of a dial gage as the pull tab is pressed by a pressure pin of the gage which pin is projectable to a constant stroke. When the pointer is angularly moved to a predetermined extent to touch a fixed contact on a calibrated face of the gage, an electrical signal for discrimination is issued.This prior apparatus is disadvantageous in that since relatively small movementofthe slider is sensed directly by the dial gage, the apparatus and the sliderto be inspected must be kept in precise position or posture during the sensing, which requires meticulous adjustment of various parts.
Further, the dial gage per se is expensive.
According to the present invention, there is provided an apparatus for inspecting automatic lock sliders for slide fasteners, each of the sliders including a slider body and a pull tab pivotally connected to the slider body, said apparatus comprising: a disk-like table intermittentlyturnable on its vertical axis and having a plurality of recesses in and along a peripheral edge of said table at predetermined distancesforreceiving the sliders one in each of said recesses; a support block disposed above said table and vertically movable toward and away from said table along a predetermined length in timed relationtothe intermittent turning of said table; a retainer member mounted on said support block and vertically movable in response to the vertical movement of said support block for retaining the slider body of one of the sliders received in one of said recesses of said table; a pressure rod mounted on said support block and vertically movable, in response to the vertical movement of said support block, for passing the pull tab of the one slider downwardly; a sensor lever pivotally mounted on a lower end portion of said retainermemberand extending substantially horizontallytherefrom, said sensor lever having a sensing projection extending downwardly therefrom for contacting the pull tab of the slider so that said sensor lever is pivotally movable in response to the pivotal movement of the pull tab; a detecting unit including a pair of upper and lower non-contact-type detectors disposed within a range in which a free end of said sensor lever is vertically movable in response to the pivotal movement of said sensor lever; and a discrimination circuit electrically connected to said detecting units for receiving electrical signals therefrom and for discriminating between normal sliders and inferior sliders based on the electrical signals from said detecting unit.
It is believed possible by means ofthe present invention to provide a slider inspecting apparatus which enables a stable and accurate inspection without meticulous adjustment of various parts and which is simple in construction and inexpensive to manufacture.
The invention will be described byway of example with reference to the accompanying drawings, wherein like references referto like parts unless the context requires otherwise and wherein:- Figure 1 is a perspective view, wi h parts omitted, of a slider inspecting apparatus em odying the present invention;
Figure2 is a side elevational view, partly in cross section, of Figure 1;
Figures 3A, 3B and 3C a re cross-sectio nal views of an automatic lock slider, showing various postures ofthesliderwhilethelatterisinspected; Figures4A, 48, 4C and 4D are views similarto Figure 2, illustrating the manner in which a normal and good slider is inspected;;
Figures Sand 6 respectively illustrate the manner in which differently inferior sliders are inspected;
Figure 7 is a perspective view of a slider of the type differentfrom that of Figures 3A, 3B and 3C; and
Figures 8A and 8B are cross-sectio n a I views of
Figure 7, respectively illustrating different postures ofthe slider.
Figures 1 and 2 show an apparatus for automatically inspecting automatic lock sliders 30 at the final stage of the slider production.
The apparatus includes a disk-l ike table 1 adapted to be intermittently turned on its vertical axis and having a plurality of recesses 10 (only one shown hereforclarity) in and along a peripheral edge ofthe table 1 at predetermined distances for receiving respective sliders 30, a support disk 2 disposed abovethetable 1 and vertically movable toward and away from the table 1 in response to the intermittent turning of the table 1, and a support block 3 fixed to an edge of the support disk 2.
The support block3 carries a retainer member4 verticallyslidably mounted thereon for retaining a slider body 31 (Figure 1 ) of one slider 30 received in one of the peripheral recesses 10 ofthe table 1. Afirst extension spring 14 is mounted between the support block3 and the retainer member4to normally urge the latter downwardly.
The support block3 also carries a pressure rod 5 vertically slidably mounted thereon for pressing a pull tab 32 of the slider30, the pressure rod 5 being disposed outwardly of the retainer member 4. A second extension spring 15, like the first spring 14, is mounted between the su pport block 3 and the pressure rod Sto normallyurgethe latter downwardly.
Asensor lever6 is pivotallymounted on a lower portion of the retainer member4 by a horizontal pivot pin 16, normally resting by gravity against a jaw4a ofthe retainer member4 in such an inclined posture that one or free end ofthe sensor lever 6 is slightlylowerthan the other or pivoted end thereof, as best shown in Figure 2. The sensor lever 6 has a sensing projection 7 extending substantially downwardly and perpendicularlytherefrom.The length ofthe sensing projection 7 is such that its lower end is slightly lower than a lower end ofthe retainer member4as the sensor lever 6 is in the above-mentioned inclined posture, as best shown in
Figure 2.
The apparatus also includes a detecting unit 20 composed of a pair of spaced upper and lower detectors 21,22 supported on a post 23. The upper and lower detectors 21,22 have a pair of vertically alignedcutouts2lc,22c, respectively,forthe passage of the free end portion of the sensor lever 6.
Each of the upper and lower detectors 21,22 is a photoelectric type switch having a light emitter 21 a, 22a disposed at one side ofthe respective cutout 21 c, 22c and a light receptor 21 b, 22b disposed atthe other side thereof, the switch being electrically connected to a discrimination circuit (not shown) via a suitable control means.
In Figures 1 and 2, the slider 30 to be inspected is received in one of the peripheral recesses 10 ofthe table 1, with the slider body 31 lying horizontally and with the pull tab 32 projecting substantially horizontally from the table 1 in a normal condition.
The lower end surface of the retainer member 4 has a shape complementary to the upper contours of the slider body 31 and a cover 35. The lower end portion ofthe pressure rodS is bifurcated so asto stably contact and press the pull tab 32 without interfering with the sensor lever 6.
Figures 3A and 3B illustrate a typical example of the automatic lock slider 30 to be inspected by the present apparatus. In assembly, a pintle 33 of the pull tab 32, a locking member 36 and a leaf spring 34 are placed on the top ofthe slider body 31 one over another in this order, and then a cover 35 is mounted on the top ofthe slider body 31 so as to cover all of the previously placed parts.
In Figure 3A, a claw end ofthe locking member 36 projects into a coupling-element guide channel 37 in thesliderbody31 under the resilience of the leaf spring 34, while the pintle 33 ofthe pull tab 32 is urged by the resilience ofthe leaf spring 34 against the top of the slider body 31 with the pull tab 32 lying substantially horizontally. In Figure 3B, the pull tab 32 is pressed downwardiy such that its pintle 33 is raised to retractthe claw end of the locking member 36from the guide channel 37 againstthe resilienceof the leaf spring 34.If this slider 30 is normal and good, when the pull tab 32 is released from being pressed downwardly, the pull tab 32 is returned to its original position (Figure 3A) under the resilience of the leaf spring 34, at which time the locking member 36 also is returned to its projected position.
Figure 3C illustrates an example of inferior slider 30 that has no function of automatic locking, because a leaf spring 34 is failed to be mounted. In this inferior slider 30, the pull tab 32 assumes an inclined posture sloping downwardly toward its free end at a relatively large angle. In other inferior sliders, which are not shown here, the locking member 36 alone may be missing or both the locking member 36 and the leaf spring 34 may be missing. In those other inferior sliders, like in the inferior slider 30 of Figure 3C, the pull tab 32 assumes an inclined posture sloping downwardlytoward its free end ata relatively large angle.
Figures 4A, 48, 4C and 4D illustrate the manner in which a normal and good slider 30 is inspected.
Firstly, with the slider 30 is received in one ofthe peripheral recesses 10 of the table 1, as shown in
Figure 2, asthe support disk 2 and hencethesupport block3 are lowered together with the retainer member4 and the pressure rod 5,the lowerorfree end of the sensing projection 7 of the sensor lever 6 is brought in contact with the pull tab 32 lying horizontally, as shown in Figure 4A, at which time the lower end ofthe retainer member4 does not reach the top of the slider 30 and at which time the free end of the sensor lever 6 is disposed in the cutout 22c of the lower detector 22 to shut offthe light path between the light emitter 22a and the light receptor 22b.
With continued lowering of the support block 3, the lower end of the retainer member 4 is brought in contact with the top of the sl ider 30 to resiliently press the slider body 31 by the extension spring 14, during which time the pull tab 32 remains in a horizontal posture under the resilience of the leaf spring 34to cause the sensor lever, which is relatively light in weight, to pivot counterclockwise aboutthe pivot pin 16 until the free end of the sensor lever 6 enters the cutout 21 c of the upper detector 21 to shutoffthe light path between the light emitter 2laandthelightreceptor2lb.
Thus, from the fact that both the light pathes ofthe upper and lower detectors 21,22 have been shut out individually, it has been detected thatthe pull tab 32, the locking member 36 and the leaf spring 34 have been mounted in the slider 30 in normal condition.
With further continued lowering of the support block 3, the retainer member4 is kept retaining the slider 30 in the one peripheral recess 10 of the table 1 under the resilience of the extension spring 14, and at the same time, the lower end of the pressure rod 5 is brought in contact with the pull tab 32 and pushes the same downwardly as shown in Figure 4C, as the strength of the extension spring 15 is greaterthan that of the leaf spring 34. As a result, the slider30 assumes the posture of Figure 3B. This downward pushing causes the sensor lever 6 to pivot clockwise about the pivot pin 16 by gravity until the free end of the sensor lever 6 enters the cutout 22c of the lower detector 22 to shut off the light path between the light emitter 22a and the light receptor 22b.Thus it has been detected that the locking member 36 ofthe slider 30 has been moved in a normal orcorrect mannerwhileapredeterminedamountofresilient force acts on the locking member 36.
Subsequently, when the pull tab 32 is returned to its original and substantially horizontal posture as the pressure rod 5 is raised by the upward movement of the support block 3 upon termination of the lowering thereof as shown in Figure 4D, the sensor lever 6 is pivoted clockwise about the pivot pin 16 underthe resilience of the leaf spring 34 until the free end of the sensor lever 6 enters the cutout 21 c of the upper detector 21 to shut offthe light path between the lightemitter21a and the light receptor 21 b.Thus it has been detected that the leaf spring 34 ofthe slider 30 has been restored in a normal or correct manner.Then, when the lower end of the retainer member4isremovedfromthetopoftheslider30as the support block 3 is further raised, whereupon the upper and lower detectors 21,22 are broken out of the non-illustrated discrimination circuit. Finally, a single cycle of the inspection is completed when the support block 3 is returned to the position of Figure 2.
An inferior slider, such as the slider30 of Figure 3C, can be inspected in the following manner:
In the example of Figure 3C, sincethe pull tab32 assumes an inclined posture sloping downwardly toward its free end at a relatively large angle due to the missing of a leaf spring, the lower or free end of the sensing projection 7 of the sensor lever 6 does not engage or at most does slightly engage the pull tab 32, thus leaving the sensor lever6 not pivoted and hence keeping the free end thereof in the cutout 22c ofthe lower detector22, as shown in Figure 5.
In other examples in which the leaf spring 34 of the inferior slider 30 has an excessive stiffness and hence is too hard and in which the individual parts of the interiorslider30 are assembled in improper postures even though the pull tab 32 is kept lying horizontally, the pull tab 32 is pivotally moved clockwiseth rough only zn insufficient angie when it is pressed downwardly by the pressure rod 5, as shown in Figure 6. Consequently, the clockwise pivotal movement of the sensor lever 6 is terminated before its free end enters the cutout 22c of the lower detector 22.
In a further example in which the pull tab 32 ofthe interiorslider 30 initially remains substantially horizontal and is not returned to such original horizontal posture after the pull tab 32 has been pressed downwardly by the pressure rod 5 and subsequently released therefrom, the counterclockwise pivotal movement of the sensor lever 6 is terminated before its free end enters the cutout 21e of the upper detector21 .
Since electrical signals issued from the detecting unit 20 when an inferior slider is inspected are different from those issued when a normal slider is inspected, it is possible to make a discrimination between normal sliders and inferior sliders based on the electrical signals and then to sort the inferior sliders from the normal sliders by controlling a slider discharging means in accordance with the electrical signals.
Figures 7, BA and SB illustrate another type of automatic lock slider, in which a cover35' is pivotally mounted on a slider body 1' by a pin 38 and has a locking claw 36' extending from the cover 35'. A leaf spring 34' fixed at one end to the slider body 1' acts on the cover 3550 as to normally urge the locking claw 36' to project into the guide channel. A pull tab 32' is operatively connected tothe cover 35' for retracting the locking claw 36' from the guide channel againstthe resilience of the leaf spring 34'.
For inspecting this type of slider, with the slider retained by the retainer member4 having the lower end surface complementary to such top contour of the slider, the pull tab 32' initially lying horizontally (Figure 8A) is pressed downwardlyto its inclined posture (Figure 8B) by the pressure rod 5, and subsequentlythe pull tab 32' is released from the pressure rod Sin the manner described above.
With this apparatus, partly because the pivotal movement of the slider pull tab is sensed bythe sensor lever which is pivotally movable so as to magnify the pivotal movement of the pull tab, and partly because the pivotal movement ofthe sensor lever is detected by the non-contacttype detecting unit, it is possible to carry out the inspection stably and preciselywithoutmeticulous adjustment of various parts. Further, the present inspecting apparatus is simple in construction and easy to maintain and inexpensive to manufacture.
Claims (4)
1. An apparatus for inspecting automatic lock sliders for slide fasteners, each of the sliders including a slider body and a pull tab pivotally connected to the slider body, said apparatus comprising:
(a) a disk-liketahle intermittentlyturnable on its vertical axis and having a plurality of recesses in and along a peripheral edge of said table at predetermined distances for receiving the sliders one in each of said recesses;
(b) a support block disposed above said table and vertically movable toward and away from said table along a predetermined length in timed relation to the intermittentturning ofsaidtable;; (c) a retainer member mounted on said support block and vertically movable in response to the vertical movement of said support blockfor retaining the slider body of one of the sliders received in one of said recesses of said table;
(d) a pressure rod mounted on said support block and vertically movable, in response to the vertical movement of said support block, for pressing the pull tab of the one slider downwardly;
(e) a sensor lever pivotally mounted on a lower end portion of said retainer member and extending substantially horizontallytherefrom, said sensor lever having a sensing projection extending downwardly therefrom for contacting the pull tab of the slider so that said sensor lever is pivotally movable in response to the pivotal movement of the pull tab;;
(f) a detecting unit including a pair of upper and lower non-contact-type detectors disposed within a range in which a free end of said sensor lever is vertically movable in response to the pivotal movementofsaid sensor lever; and
(g) a discrimination circuitelectricallyconnected to said detecting unit for receiving electrical signals therefrom and for discriminating between normal sliders and inferior sliders based on the electrical signals from said detecting unit.
2. An apparatus according to claim 1, said retaining member being vertically slideable on said support block and being normally urged downwardlybyafirstspring.
3. An apparatus according to claim 1 or 2, said pressure rod being vertically slidable on said support block and being normally urged downwardly by a second spring.
4. An apparatus according to claim 1,2 or 3, said upperand lower detectors having a pairofvertically aligned cutouts, respectively, for passage ofthefree end of said sensor lever, each of said upper and lowerdetectorshavinga light emitter disposed at one side of the respective cutout and a light receptor disposed atthe other side thereof.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985190362U JPH0529602Y2 (en) | 1985-12-12 | 1985-12-12 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8629623D0 GB8629623D0 (en) | 1987-01-21 |
| GB2184540A true GB2184540A (en) | 1987-06-24 |
| GB2184540B GB2184540B (en) | 1990-07-18 |
Family
ID=16256921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8629623A Expired - Lifetime GB2184540B (en) | 1985-12-12 | 1986-12-11 | Apparatus for inspecting slide fastener sliders |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH0529602Y2 (en) |
| KR (2) | KR870009343U (en) |
| GB (1) | GB2184540B (en) |
| HK (1) | HK57193A (en) |
| MY (1) | MY100577A (en) |
| PH (1) | PH25867A (en) |
| SG (1) | SG35193G (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5505099A (en) * | 1993-10-19 | 1996-04-09 | Ykk Corporation | Apparatus for inspecting automatic lock sliders for slide fasteners |
| CN104759975A (en) * | 2015-02-13 | 2015-07-08 | 广州六禧拉链发展有限公司 | Full-automatic pull head polishing machine |
| CN112558171A (en) * | 2020-11-19 | 2021-03-26 | 东风(武汉)实业有限公司 | A induction system for tablet detects |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200482210Y1 (en) * | 2016-05-17 | 2016-12-29 | 케이피피지퍼 주식회사 | Inspection device for zipper chain |
| KR102032763B1 (en) * | 2018-12-24 | 2019-11-29 | 최일식 | Apparatus for manufacturing slider for slide fastener) |
| CN113940486A (en) * | 2020-07-15 | 2022-01-18 | Ykk株式会社 | Slider unlocking system and unlocking method |
-
1985
- 1985-12-12 JP JP1985190362U patent/JPH0529602Y2/ja not_active Expired - Lifetime
-
1986
- 1986-11-27 MY MYPI86000146A patent/MY100577A/en unknown
- 1986-12-11 KR KR2019860019768U patent/KR870009343U/en not_active IP Right Cessation
- 1986-12-11 PH PH34577A patent/PH25867A/en unknown
- 1986-12-11 KR KR2019860019768U patent/KR880002428Y1/en not_active Application Discontinuation
- 1986-12-11 GB GB8629623A patent/GB2184540B/en not_active Expired - Lifetime
-
1993
- 1993-03-29 SG SG351/93A patent/SG35193G/en unknown
- 1993-06-10 HK HK571/93A patent/HK57193A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5505099A (en) * | 1993-10-19 | 1996-04-09 | Ykk Corporation | Apparatus for inspecting automatic lock sliders for slide fasteners |
| CN104759975A (en) * | 2015-02-13 | 2015-07-08 | 广州六禧拉链发展有限公司 | Full-automatic pull head polishing machine |
| CN104759975B (en) * | 2015-02-13 | 2017-01-11 | 广州六禧拉链发展有限公司 | Full-automatic pull head polishing machine |
| CN112558171A (en) * | 2020-11-19 | 2021-03-26 | 东风(武汉)实业有限公司 | A induction system for tablet detects |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6298513U (en) | 1987-06-23 |
| PH25867A (en) | 1991-12-02 |
| GB2184540B (en) | 1990-07-18 |
| SG35193G (en) | 1993-06-11 |
| KR870009343U (en) | 1987-07-07 |
| MY100577A (en) | 1990-12-15 |
| JPH0529602Y2 (en) | 1993-07-29 |
| GB8629623D0 (en) | 1987-01-21 |
| HK57193A (en) | 1993-06-18 |
| KR880002428Y1 (en) | 1988-07-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19951211 |