EP0090131B1 - Plastic cap for fastener elements used in haberdashery, such as snap fasteners - Google Patents

Plastic cap for fastener elements used in haberdashery, such as snap fasteners Download PDF

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Publication number
EP0090131B1
EP0090131B1 EP83100428A EP83100428A EP0090131B1 EP 0090131 B1 EP0090131 B1 EP 0090131B1 EP 83100428 A EP83100428 A EP 83100428A EP 83100428 A EP83100428 A EP 83100428A EP 0090131 B1 EP0090131 B1 EP 0090131B1
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EP
European Patent Office
Prior art keywords
cap
end flange
honeycomb
several
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83100428A
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German (de)
French (fr)
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EP0090131A2 (en
EP0090131A3 (en
Inventor
Bernhard Dipl.-Ing. Nysten
Winfried Hurtz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
William Prym Werke GmbH and Co KG
Original Assignee
William Prym Werke GmbH and Co KG
William Prym GmbH and Co KG
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Publication date
Application filed by William Prym Werke GmbH and Co KG, William Prym GmbH and Co KG filed Critical William Prym Werke GmbH and Co KG
Publication of EP0090131A2 publication Critical patent/EP0090131A2/en
Publication of EP0090131A3 publication Critical patent/EP0090131A3/en
Application granted granted Critical
Publication of EP0090131B1 publication Critical patent/EP0090131B1/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44BBUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B17/00Press-button or snap fasteners
    • A44B17/0064Details
    • A44B17/0082Decoration

Definitions

  • the invention is directed to a plastic cap on the end flange of a holding part, such as a rivet, a piercing nail, a prong ring, a sewing eye or the like, for wouldnrdashery items, such as snap fastener parts, reinforcing rivets, trouser hooks, buttons, decorative parts or the like, the cap has a central recess on the underside with undercut inner side walls, in which the conical end flange is fastened by flattening its taper.
  • the invention has for its object to develop a simple and inexpensive plastic cap of this type, in which a uniform coloring is achieved and in which the holding part can be reliably attached.
  • the cap has a honeycomb structure on the underside with an essentially uniform wall thickness on all sides, in which the recess is included as a central honeycomb bordered by a ring wall, the ring wall on its inner side walls carries the clear opening width narrowing axial ribs into which the flattened end flange bites with its peripheral edge, and the plastic of the ring wall is squeezed in the top region of the edge zone of the end flange.
  • a cap of great strength is obtained with a comparatively low cost of material, whereby the central honeycomb used as a recess can nevertheless have a considerable overall height in the center of the cap, which creates a high ring wall for a perfect fastening of the holding part.
  • the lateral axial ribs in the ring wall permit a relatively easy fastening process when the end flange is flattened on the holding part, which contributes to the attachment strength as well as the subsequent crushing in the top area of the ring wall, the above-mentioned large structural height having a favorable effect in this regard.
  • the production of such a plastic cap as an injection molded part can be carried out comfortably with its honeycomb structure in its axial ribs.
  • a sprue is conveniently housed inside a honeycomb so that it does not have to be cut off completely, which simplifies and speeds up production.
  • this sprue pin can also be used for the rotational orientation of a rotationally symmetrical cap when it is attached, when it is important to mount a design located on the cap face in a certain rotational position of the cap.
  • the applied honeycomb structure is designed on a base plate of the cap in the form of a spoke wheel.
  • the inner ring of this structure is formed by the ring wall, while its outer ring runs along the outline of the cap and radial spoke webs are located between the inner and outer ring.
  • the uniformity of the wall thickness is easy to achieve here.
  • the fastening security is significantly improved if the peripheral edge of the end flange of the holding part is provided with a toothing, because this easily presses into the axial ribs of the inner wall of the ring wall.
  • the end flange can be leveled easily, but the depth of penetration of the end flange into the material of the recess is considerably increased.
  • the pull-out strength of the attached holding part is improved if you provide its end flange with radial beads. This prevents the end flange from being “peeled off” from the receptacle in the cap.
  • These radial squeegees can be made usable for the mentioned peripheral toothing of the end flange if they are allowed to pass through to the peripheral edge of the end flange.
  • An axially extending circumferential toothing is thus obtained instead of an otherwise radially extending circumferential toothing. Both types of toothing have their particular advantages.
  • the plastic cap 10 is intended to be firmly connected to a holding part 11 which is designed as a rivet in all exemplary embodiments. Then there is a visible from Fig. 7 fastener 12 which is intended to any wouldnrdashery item 13, for example ge 7, a die-shaped push-button part to be fastened to a fabric web 14.
  • the plastic cap 10 is formed in one piece, but can be divided into a base plate 15, which is curved on the view side and is equipped on the underside 16 with a honeycomb structure 17.
  • the honeycomb structure has the shape of a spoke wheel. It comprises a central inner ring 21, an outer ring 22 running along the outline of the cap, and spoke webs 23 connecting them radially.
  • the outer ring is provided with a step 24 in the area of the outline of the cap. This creates a recess 20 in the central region of the cap, which is enclosed by the inner ring 21. Between the two rings 21, 22 there is a group of honeycombs 25 which, despite the considerable overall height 26 of the cap, requires only a small amount of material to produce the cap.
  • the depth of the honeycomb 25 and in particular the cutout 20 can extend over more than half the overall height 26.
  • the upper face 27 of the cap 10 can be specially profiled, e.g. wear a design, as can be seen from the profile piece 28 indicated at the top right in FIG. 2.
  • a sprue pin 18 which is arranged in the interior of a honeycomb 25 and which can simply end in the height region of the cap underside 16 can serve to fix the position of the cap during assembly.
  • the design 28 on the cap face 27 is fixed in terms of arrangement with respect to the pin 18.
  • the honeycomb structure 17 creates uniform wall thicknesses 19 in the cap 10, which make it possible, depending on the need, to color the cap 10, which is made of white plastic, evenly into the desired color or color combination. The color penetrates everywhere in the same way. An ideal coloring product is obtained.
  • the recess 20 of the cap 10 is designed in a special way.
  • the inner side wall 31 of the central recess 20 narrows conically in the direction of the cap underside 16, as can be seen particularly clearly from the enlargement in FIG.
  • Arranged in distribution along this inner side wall 31 is a family of axial ribs 30, which narrow the clear opening width 32 in the opening area. 2, the innermost surface lines of these axial ribs 30 facing the axis run with a conical inclination opposite to the mentioned conicity of the inner side wall 31.
  • the axial ribs 30 increasingly narrow the clear diameter between diametrically opposed axial ribs 30. The greatest narrowing of their width is therefore at the base point of the axial ribs 30 on the bottom.
  • the taper is 3 °.
  • the holding part used here such as a hollow rivet 11 from FIGS. 4 and 5, is formed in one piece in itself, but is divided into a lower, in the initial state tapered end flange 35 and an axial holding shaft 36, which here, of course, consists of a hollow tube consists.
  • a compressible nail or a bendable prong could also serve as such a holding shaft 36.
  • such a holding shaft 36 could also consist of an eyelet which can be sewn directly onto the fabric web 14, so that in this application there is no fastening to a suitcaserdashery item.
  • the plastic cap 10 provided with the holding part 11 is a button or decorative part.
  • the holding part 11 is provided on its end flange 35 with radial beads 37 which contribute to its stiffening. These beads 37 begin on the inside at a step 38 best seen in FIG. 4.
  • the circumference of the flange 35 is provided with a sharpening 39 which, when this holding part 11 is attached, enables easy penetration into the plastic of the cap 10. This takes place in the manner shown in FIG. 7 in the final state.
  • the end flange 35 is first pushed into the central recess 20 to the bottom 34 without resistance, which is achieved by appropriate dimensioning of the clear recess width 32 and the flange diameter 40. Then, however, additional axial pressure is exerted on the holding part 11 in the direction of the cap 10, so that there is a flattening of the conicity in the flange 35 and this therefore widens in its diameter 40.
  • the circumferential sharpenings therefore cut into the base of the axial ribs 30 in the region of the base 34 and penetrate even further into the wall of the inner ring 21 from there.
  • the dome region 41 of the inner ring 21 deforms, so that the material regions 42 shown in FIG. 7 are pressed over the edge zone of the end flange 35. This results in a very firm anchoring of the holding part 11 in the cap 10.
  • the holding part 11 'shown in FIG. 9 could be used, the end flange 35' of which differs from the previous one in that the flange periphery is provided with a toothing which produces a radial profile.
  • These teeth 43 act like cutting edges which penetrate particularly well into the material of the axial ribs 30 and the inner ring wall 31 during the described fastening process of such a holding part 11 '.
  • such toothing could also result from transferring the beads 37 explained in connection with FIG. 5 into the circumferential sharpening 39, so that an axially corrugated tooth profile results here, which has the advantage of rigidity on the one hand and the advantage of good on the other Penetration ability.
  • the fastening element 12 achieved by this union of the cap 10 and the holding part 11 can now, as can be seen from FIG. 7, be pierced with the holding shaft 36 through the fabric web 14 in order to be connected to the abovementioned Vietnameserdashery article 13 on the opposite side of the web.
  • it is a matrix-shaped push button part, which is designed here as a so-called S-spring push button is.
  • This consists of a profiled sheet metal body with a centrally raised pot 44, which has an opening 45, and with a plate 46, which is flanged at the edge and serves to mount a bow spring 47.
  • the bow spring 47 has an S-shape on each of its two bow legs, so that leg regions 48 follow. big spring through lateral slits into the inside of the pot 44 and there coupling together with suitably profiled male-shaped closing surfaces of a complementary push button part.
  • the holding shaft 36 driven by the fabric web 14 is inserted into the interior of the pot 44 via the opening 45 and is riveted there firmly to this push-button part 13 by flanging the shaft end.
  • the push button part 13 is fastened on the side of the fabric web 14 opposite the cap 10.
  • the radial beads 37 are very favorable for the described expansion of the diameter 40 of the end flange 35 on the holding part 11 or 11 ', which results when its conicity is leveled during the fastening process in the cap 10. Material is stored in them, which is available for this leveling for the diameter expansion.
  • the stiffening effect of the radial beads 37 results in the radial direction in the end flange 35.
  • the described squeezing of the material areas 42 of the inner ring 21 located in the cap area 41 can also take place in segments. This crushing is normally done by cold upsetting. If necessary, you will also use a heat effect, e.g. is generated by an ultrasonic field in this area.

Description

Die Erfindung richtet sich auf eine Kunststoffkappe am Endflansch eines Halteteils, wie eines Niets, eines Stechnagels, eines Zackenrings, einer Annähöse od.dgl., für Kurzwarenartikel, wie Druckknopfteile, Verstärkungsniete, Hosenhaken, Knöpfe, Zierteile od.dgl., wobei die Kappe unterseitig eine zentrale Aussparung mit hinterschnittenen Innenseitenwänden aufweist, worin der konische Endflansch durch Verflachen seiner Konizität befestigt ist.The invention is directed to a plastic cap on the end flange of a holding part, such as a rivet, a piercing nail, a prong ring, a sewing eye or the like, for haberdashery items, such as snap fastener parts, reinforcing rivets, trouser hooks, buttons, decorative parts or the like, the cap has a central recess on the underside with undercut inner side walls, in which the conical end flange is fastened by flattening its taper.

Die Festigkeit der Anbringung solcher Halteteile an bekannten Kunststoffkappen dieser Art erwies sich als unzureichend. Wurden diese Kappen nach ihrer Fertigstellung eingefärbt, so ergaben sich aufgrund verschiedener Profildicke störende Farbunterschiede.The strength of the attachment of such holding parts to known plastic caps of this type has proven to be inadequate. If these caps were colored after their completion, there were annoying color differences due to different profile thickness.

Der Erfindung liegt die Aufgabe zugrunde, eine einfache und preiswerte Kunststoffkappe dieser Art zu entwickeln, bei der eine gleichmässige Einfärbung erreicht ist und worin der Halteteil zuverlässig zu befestigen ist.The invention has for its object to develop a simple and inexpensive plastic cap of this type, in which a uniform coloring is achieved and in which the holding part can be reliably attached.

Dies wird erfindungsgemäss dadurch erreicht, dass die Kappe unterseitig eine Wabenstruktur mit einer allseits im wesentlichen gleichförmigen Wandstärke aufweist, worin die Aussparung als eine von einem Ringwall umgrenzte Zentralwabe einbezogen ist, der Ringwall an seinen Innenseitenwänden die lichte Aussparungsweite verengende Axialrippen trägt, in welche sich der abgeflachte Endflansch mit seiner Umfangskante einbeisst, und der Kunststoff des Ringwalls in dessen Kuppenbereich über die Randzone des Endflansches gequetscht ist.This is achieved according to the invention in that the cap has a honeycomb structure on the underside with an essentially uniform wall thickness on all sides, in which the recess is included as a central honeycomb bordered by a ring wall, the ring wall on its inner side walls carries the clear opening width narrowing axial ribs into which the flattened end flange bites with its peripheral edge, and the plastic of the ring wall is squeezed in the top region of the edge zone of the end flange.

Durch die Wabenstruktur erhält man eine Kappe grosser Festigkeit mit verhältnismässig geringem Materialaufwand, wobei die als Aussparung genutzte Zentralwabe dennoch in der Kappenmitte eine beträchtliche Bauhöhe aufweisen kann, die einen hohen Ringwall entstehen lässt für eine einwandfreie Befestigung des Halteteils. Die seitlichen Axialrippen im Ringwall gestatten beim Einebnen des Endflansches am Halteteil einen verhältnismässig leicht zu bewerkstelligenden Befestigungsvorgang, der für die Anbringungsfestigkeit genauso beiträgt wie die nachfolgende Quetschung im Kuppenbereich des Ringwalls, wobei die vorerwähnte grosse Bauhöhe sich in dieser Hinsicht günstig auswirkt. Die Herstellung einer solchen Kunststoffkappe als Spritzgussteil ist mit ihrer Wabenstruktur in ihren Axialrippen bequem ausführbar. Ein Angusszapfen wird zweckmässigerweise im Inneren einer Wabe untergebracht, so dass er nicht restlos abgeschnitten werden braucht, was die Fertigung vereinfacht und beschleunigt. Dieser Angusszapfen kann aber zugleich zur Drehorientierung einer rotationssymmetrisch ausgebildeten Kappe bei ihrer Anbringung verwendet werden, wenn es darauf ankommt, ein auf der Kappenschauseite befindliches Dessin in einer bestimmten Drehlage der Kappe zu montieren.Due to the honeycomb structure, a cap of great strength is obtained with a comparatively low cost of material, whereby the central honeycomb used as a recess can nevertheless have a considerable overall height in the center of the cap, which creates a high ring wall for a perfect fastening of the holding part. The lateral axial ribs in the ring wall permit a relatively easy fastening process when the end flange is flattened on the holding part, which contributes to the attachment strength as well as the subsequent crushing in the top area of the ring wall, the above-mentioned large structural height having a favorable effect in this regard. The production of such a plastic cap as an injection molded part can be carried out comfortably with its honeycomb structure in its axial ribs. A sprue is conveniently housed inside a honeycomb so that it does not have to be cut off completely, which simplifies and speeds up production. However, this sprue pin can also be used for the rotational orientation of a rotationally symmetrical cap when it is attached, when it is important to mount a design located on the cap face in a certain rotational position of the cap.

Fertigungstechnisch einfach und für die Festigkeit sehr förderlich ist, wenn man auf einer Grundplatte der Kappe die aufgebrachte Wabenstruktur speichenradförmig gestaltet. In diesem Fall ist der Innenring dieser Struktur vom Ringwall gebildet, während ihr Aussenring längs des Kappenumrisses verläuft und zwischen dem Innen- und Aussenring radial verlaufende Speichenstege liegen. Die Gleichförmigkeit der Wandstärke ist hier gut zu verwirklichen.It is technically simple and very conducive to strength if the applied honeycomb structure is designed on a base plate of the cap in the form of a spoke wheel. In this case, the inner ring of this structure is formed by the ring wall, while its outer ring runs along the outline of the cap and radial spoke webs are located between the inner and outer ring. The uniformity of the wall thickness is easy to achieve here.

Die Befestigungssicherheit wird entscheidend verbessert, wenn die Umfangskante des Endflansches vom Halteteil mit einer Zahnung versehen ist, weil diese leichtgängig in die Axialrippen der Ringwall-Innenseitenwandsicheindrückt. Das Einebnen des Endflansches ist leicht ausführbar und dennoch die Eindringtiefe des Endflansches in den Werkstoff der Aussparung beträchtlich erhöht. Die Ausreissfestigkeit des angebrachten Halteteils wird verbessert, wenn man seinen Endflansch mit Radialsicken versieht. Ein «Abschälen» des Endflansches aus der Aufnahme in der Kappe wird dadurch verhindert. Diese Radialsikken können für die erwähnte Umfangszahnung des Endflansches mitnutzbar gemacht werden, wenn man sie bis zur Umfangskante des Endflansches durchgehen lässt. Damit erhält man eine axialverlaufende Umfangszahnung statt einer sonst sich radial erstreckenden Umfangszahnung. Beide Formen der Zahnung haben ihre besonderen Vorteile.The fastening security is significantly improved if the peripheral edge of the end flange of the holding part is provided with a toothing, because this easily presses into the axial ribs of the inner wall of the ring wall. The end flange can be leveled easily, but the depth of penetration of the end flange into the material of the recess is considerably increased. The pull-out strength of the attached holding part is improved if you provide its end flange with radial beads. This prevents the end flange from being “peeled off” from the receptacle in the cap. These radial squeegees can be made usable for the mentioned peripheral toothing of the end flange if they are allowed to pass through to the peripheral edge of the end flange. An axially extending circumferential toothing is thus obtained instead of an otherwise radially extending circumferential toothing. Both types of toothing have their particular advantages.

In der Zeichnung ist die Erfindung in mehreren Beispielen dargestellt. Es zeigen:

  • Fig. 1 in starker Vergrösserung die Unteransicht einer erfindungsgemäss gestalteten Kunststoffkappe,
  • Fig. 2 einen Radialschnitt durch die Kappe längs der Schnittlinie 11-11 von Fig.1, wobei in einem Halbmesser eine alternative andere Profilform der Kappe angedeutet ist,
  • Fig. 3 eine vergrösserte Detailansicht aus dem Radialschnitt von Fig. 2,
  • Fig. 4 ein Axialschnitt durch einen zugehörigen Halteteil, der hier als Hohlniet ausgebildet ist,
  • Fig. 5 eine Draufsicht auf das Hohlniet von Fig. 4,
  • Fig. 6 eine geschnittene Detailansicht durch ein Teilstück des Endflansches vom Halteteil der Fig. 5 längs der dort eingezeichneten Schnittlinie VI-VI,
  • Fig. 7 im Radialschnitt zusammengehörige Bestandteile eines Kurzwarenartikels, nämlich eines matrizenförmigen Druckknopfteils mit dessen Befestigung,
  • Fig. 8 die Unteransicht auf den in Fig. 7 verwendeten matrizenförmigen Druckknopfteil und
  • Fig. 9 eine der Fig. 5 entsprechende Draufsicht auf einen bei der Erfindung verwendbaren Halteteil, nämlich ebenfalls eines Hohlniets, einer anderen Ausführungsform.
In the drawing, the invention is shown in several examples. Show it:
  • 1 in a large enlargement the bottom view of a plastic cap designed according to the invention,
  • 2 shows a radial section through the cap along the section line 11-11 of FIG. 1, an alternative, different profile shape of the cap being indicated in a radius,
  • 3 is an enlarged detail view from the radial section of FIG. 2,
  • 4 shows an axial section through an associated holding part, which is designed here as a hollow rivet,
  • 5 is a plan view of the hollow rivet of FIG. 4,
  • 6 is a sectional detailed view through a section of the end flange of the holding part of FIG. 5 along the section line VI-VI shown therein,
  • 7 is a radial section of components belonging to a haberdashery article, namely a die-shaped push-button part with its attachment,
  • Fig. 8 is the bottom view of the die-shaped push button part used in Fig. 7 and
  • FIG. 9 shows a top view corresponding to FIG. 5 of a holding part that can be used in the invention, namely also a hollow rivet, of another embodiment.

Die Kunststoffkappe 10 ist bestimmt, mit einem Halteteil 11 fest verbunden zu werden, der in allen Ausführungsbeispielen als Hohlniet ausgebildet ist. Danach liegt ein aus Fig. 7 ersichtliches Befestigungselement 12 vor, das dazu bestimmt ist, einen beliebigen Kurzwarenartikel 13, z.B. gemäss Fig. 7 ein matrizenförmigen Druckknopfteil, an einer Stoffbahn 14 zu befestigen.The plastic cap 10 is intended to be firmly connected to a holding part 11 which is designed as a rivet in all exemplary embodiments. Then there is a visible from Fig. 7 fastener 12 which is intended to any haberdashery item 13, for example ge 7, a die-shaped push-button part to be fastened to a fabric web 14.

Die Kunststoffkappe 10 ist einstückig ausgebildet, lässt sich aber gliedern in eine schauseitig gewölbt verlaufende Grundplatte 15, die auf der Unterseite 16 mit einer Wabenstruktur 17 ausgerüstet ist. Die Wabenstruktur hat die Form eines Speichenrads. Sie umfasst einen zentralen Innenring 21, einen längs des Kappenumrisses verlaufenden Aussenring 22 und diese radial verbindende Speichenstege 23. Der Aussenring ist im Bereich des Kappenumrisses mit einer Abstufung 24 versehen. Dadurch entsteht im Zentralbereich der Kappe eine Aussparung 20, die von dem Innenring 21 umschlossen ist. Zwischen den beiden Ringen 21, 22 entsteht eine Schar von Waben 25, die trotz beachtlicher Bauhöhe 26 der Kappe nur einen geringen Werkstoffaufwand zur Kappenherstellung erfordert. Die Tiefe der Waben 25 und insbesondere der Aussparung 20 kann sich über mehr als die halbe Bauhöhe 26 erstrecken. Die obere Schauseite 27 der Kappe 10 kann besonders profiliert sein, z.B. ein Dessin tragen, wie aus dem rechts oben in Fig. 2 angedeuteten Profilstück 28 zu entnehmen ist. Zur Lagefixierung der Kappe bei der Montage kann ein im Inneren einer Wabe 25 angeordneter Angusszapfen 18 dienen, der einfach im Höhenbereich der Kappenunterseite 16 enden kann. Das Dessin 28 auf der KappenSchauseite 27 ist bezüglich des Zapfens 18 anordnungsmässig fixiert. Die Wabenstruktur 17 schafft bei der Kappe 10 überall gleichförmige Wandstärken 19, die es ermöglichen, je nach Bedarf, die aus weissem Kunststoff bestehende Kappe 10 gleichmässig in die gewünschte Farbe oder Farbkombination einzufärben. Die Farbe dringt überall in gleicher Weise ein. Man erhält ein ideales Färbungsprodukt.The plastic cap 10 is formed in one piece, but can be divided into a base plate 15, which is curved on the view side and is equipped on the underside 16 with a honeycomb structure 17. The honeycomb structure has the shape of a spoke wheel. It comprises a central inner ring 21, an outer ring 22 running along the outline of the cap, and spoke webs 23 connecting them radially. The outer ring is provided with a step 24 in the area of the outline of the cap. This creates a recess 20 in the central region of the cap, which is enclosed by the inner ring 21. Between the two rings 21, 22 there is a group of honeycombs 25 which, despite the considerable overall height 26 of the cap, requires only a small amount of material to produce the cap. The depth of the honeycomb 25 and in particular the cutout 20 can extend over more than half the overall height 26. The upper face 27 of the cap 10 can be specially profiled, e.g. wear a design, as can be seen from the profile piece 28 indicated at the top right in FIG. 2. A sprue pin 18 which is arranged in the interior of a honeycomb 25 and which can simply end in the height region of the cap underside 16 can serve to fix the position of the cap during assembly. The design 28 on the cap face 27 is fixed in terms of arrangement with respect to the pin 18. The honeycomb structure 17 creates uniform wall thicknesses 19 in the cap 10, which make it possible, depending on the need, to color the cap 10, which is made of white plastic, evenly into the desired color or color combination. The color penetrates everywhere in the same way. An ideal coloring product is obtained.

Die Aussparung 20 der Kappe 10 ist in besonderer Weise ausgebildet. Die Innenseitenwand 31 der zentralen Aussparung 20 verengt sich konisch in Richtung auf die Kappenunterseite 16 hin, wie besonders deutlich aus der Vergrösserung in Fig. hervorgeht. In Verteilung längs dieser Innenseitenwand 31 ist eine Schar von Axialrippen 30 angeordnet, welche im Öffnungsbereich die lichte Aussparungsweite 32 verengen. Bezogen auf die strichpunktiert in Fig. 2 angedeutete Achse 33 der Kappe 10 verlaufen die der Achse zugekehrten innersten Mantellinien dieser Axialrippen 30 mit einer zu der erwähnten Konizität der Innenseitenwand 31 entgegengesetzten konischen Neigung. Zum Boden 34 dieser Aussparung 20 hin verengen die Axialrippen 30 zunehmend den lichten Durchmesser zwischen diametral einander gegenüberliegenden Axialrippen 30. Die grösste Verengung ihrer Weite liegt also im bodenseitigen Fusspunkt der Axialrippen 30 vor. Die Konizität beträgt 3°.The recess 20 of the cap 10 is designed in a special way. The inner side wall 31 of the central recess 20 narrows conically in the direction of the cap underside 16, as can be seen particularly clearly from the enlargement in FIG. Arranged in distribution along this inner side wall 31 is a family of axial ribs 30, which narrow the clear opening width 32 in the opening area. 2, the innermost surface lines of these axial ribs 30 facing the axis run with a conical inclination opposite to the mentioned conicity of the inner side wall 31. Towards the bottom 34 of this cutout 20, the axial ribs 30 increasingly narrow the clear diameter between diametrically opposed axial ribs 30. The greatest narrowing of their width is therefore at the base point of the axial ribs 30 on the bottom. The taper is 3 °.

Der hier zur Anwendung kommende Halteteil, wie nämlich ein Hohlniet 11 von Fig. 4 und 5, ist in sich einstückig ausgebildet, gliedert sich aber in einen unteren, im Ausgangszustand konisch verlaufenden Endflansch 35 und einen axialen Halteschaft 36, der hier natürlich aus einem Hohlrohr besteht. Als ein solcher Halteschaft 36 könnte auch ein stauchfähiger Nagel oder ein umbiegbarer Zacken dienen. Bedarfsweise könnte ein solcher Halteschaft 36 auch aus einer unmittelbar an der Stoffbahn 14 annähbaren Öse bestehen, so dass in diesem Anwendungsfall eine Befestigung an einem Kurzwarenartikel entfällt. In diesem Fall ist die mit dem Halteteil 11 versehene Kunststoffkappe 10 ein Knopf oder Zierteil.The holding part used here, such as a hollow rivet 11 from FIGS. 4 and 5, is formed in one piece in itself, but is divided into a lower, in the initial state tapered end flange 35 and an axial holding shaft 36, which here, of course, consists of a hollow tube consists. A compressible nail or a bendable prong could also serve as such a holding shaft 36. If necessary, such a holding shaft 36 could also consist of an eyelet which can be sewn directly onto the fabric web 14, so that in this application there is no fastening to a haberdashery item. In this case, the plastic cap 10 provided with the holding part 11 is a button or decorative part.

Im Fall der Fig. 4 bis 7 ist der Halteteil 11 an seinem Endflansch 35 mit Radialsicken 37 versehen, die zu seiner Versteifung beitragen. Diese Sicken 37 beginnen innenwärts an einer am besten aus Fig. 4 ersichtlichen Stufe 38. Der Umfang des Flansches 35 ist mit einer Zuschärfung 39 versehen, die bei der Anbringung dieses Halteteils 11 ein leichtes Eindringen in den Kunststoff der Kappe 10 ermöglicht. Dies vollzieht sich in der aus Fig. 7 im Endzustand ersichtlichen Weise.In the case of FIGS. 4 to 7, the holding part 11 is provided on its end flange 35 with radial beads 37 which contribute to its stiffening. These beads 37 begin on the inside at a step 38 best seen in FIG. 4. The circumference of the flange 35 is provided with a sharpening 39 which, when this holding part 11 is attached, enables easy penetration into the plastic of the cap 10. This takes place in the manner shown in FIG. 7 in the final state.

Der Endflansch 35 wird in die zentrale Aussparung 20 bis zum Boden 34 zunächst widerstandslos geschoben, was durch entsprechende Bemessung der lichten Aussparungsweite 32 und des Flanschdurchmessers 40 erreicht wird. Dann wird aber zusätzlicher Axialdruck auf den Halteteil 11 in Richtung auf die Kappe 10 ausgeübt, so dass es zu einer Abflachung der Konizität im Flansch 35 kommt und diese sich daher in seinem Durchmesser 40 erweitert. Die umfangsseitigen Zuschärfungen schneiden sich daher im Bereich des Bodens 34 in den Fuss der Axialrippen 30 ein und dringen von dort noch weiter in die Wand des Innenrings 21 ein. Der Kuppenbereich 41 des Innenrings 21 verformt sich, so dass die aus Fig. 7 ersichtlichen Werkstoffbereiche 42 über die Randzone des Endflansches 35 gedrückt werden. Dadurch ergibt sich eine sehr feste Verankerung des Halteteils 11 in der Kappe 10.The end flange 35 is first pushed into the central recess 20 to the bottom 34 without resistance, which is achieved by appropriate dimensioning of the clear recess width 32 and the flange diameter 40. Then, however, additional axial pressure is exerted on the holding part 11 in the direction of the cap 10, so that there is a flattening of the conicity in the flange 35 and this therefore widens in its diameter 40. The circumferential sharpenings therefore cut into the base of the axial ribs 30 in the region of the base 34 and penetrate even further into the wall of the inner ring 21 from there. The dome region 41 of the inner ring 21 deforms, so that the material regions 42 shown in FIG. 7 are pressed over the edge zone of the end flange 35. This results in a very firm anchoring of the holding part 11 in the cap 10.

Alternativ könnte dabei der in Fig. 9 gezeigte Halteteil 11' verwendet werden, dessen Endflansch 35' sich vom vorhergehenden dadurch unterscheidet, dass der Flanschumfang mit einer Zahnung versehen ist, welche eine radiale Profilierung erzeugt. Diese Zähne 43 wirken wie Schneiden, die bei dem geschilderten Befestigungsvorgang eines solchen Halteteils 11' besonders gut in den Werkstoff der Axialrippen 30 und der Innenringwand 31 eindringen. Alternativ könnte eine solche Zahnung auch dadurch entstehen, dass man die im Zusammenhang mit Fig. 5 erläuterten Sicken 37 bis in die umfangsseitige Zuschärfung 39 überführt, so dass sich hier ein axialgewelltes Zahnprofil ergibt, das einerseits den Vorteil der Steifigkeit und andererseits den Vorteil einer guten Eindringfähigkeit besitzt.Alternatively, the holding part 11 'shown in FIG. 9 could be used, the end flange 35' of which differs from the previous one in that the flange periphery is provided with a toothing which produces a radial profile. These teeth 43 act like cutting edges which penetrate particularly well into the material of the axial ribs 30 and the inner ring wall 31 during the described fastening process of such a holding part 11 '. Alternatively, such toothing could also result from transferring the beads 37 explained in connection with FIG. 5 into the circumferential sharpening 39, so that an axially corrugated tooth profile results here, which has the advantage of rigidity on the one hand and the advantage of good on the other Penetration ability.

Das durch diese Vereinigung von Kappe 10 und Halteteil 11 erreichte Befestigungselement 12 kann nun, wie aus Fig. 7 erkennbar wird$ffiit seinem Halteschaft 36 durch die Stoffbahn 14 gestochen werden, um auf der gegenüberliegenden Bahnseite mit dem erwähnten Kurzwarenartikel 13 verbunden zu werden. Im vorliegenden Fall handelt es sich, wie bereits erwähnt wurde, um einen matrizenförmigen Druckknopfteil, der hier als sogenannter S-Federdruckknopf ausgebildet ist. Dieser besteht aus einem profilierten Blechkörper mit einem zentral hochgezogenen, eine Öffnung 45 aufweisenden Topf 44 und mit einem randseitig umbördelten Teller 46, der zur Lagerung einer Bügelfeder 47 dient. Die Bügelfeder 47 hat an ihren beiden Bügelschenkeln jeweils eines S-Verlauf, so dass Schenkelbereiche 48 nachgie- . big federnd durch seitliche Schlitze in das Innere des Topfes 44 treten und dort kuppelnd mit geeignet profilierten patrizenförmigen Schliessflächen eines komplementären Druckknopfteils zusammenwirken.The fastening element 12 achieved by this union of the cap 10 and the holding part 11 can now, as can be seen from FIG. 7, be pierced with the holding shaft 36 through the fabric web 14 in order to be connected to the abovementioned haberdashery article 13 on the opposite side of the web. In the present case, as has already been mentioned, it is a matrix-shaped push button part, which is designed here as a so-called S-spring push button is. This consists of a profiled sheet metal body with a centrally raised pot 44, which has an opening 45, and with a plate 46, which is flanged at the edge and serves to mount a bow spring 47. The bow spring 47 has an S-shape on each of its two bow legs, so that leg regions 48 follow. big spring through lateral slits into the inside of the pot 44 and there coupling together with suitably profiled male-shaped closing surfaces of a complementary push button part.

Zwecks Montage wird der durch die Stoffbahn 14 getriebene Halteschaft 36 über die Öffnung 45 in das Innere des Topfes 44 eingeführt und dort durch Umbördeln des Schaftendes fest mit diesem Druckknopfteil 13 vernietet. Dadurch ist der Druckknopfteil 13 auf der gegenüber der Kappe 10 gegenüberliegenden Seite der Stoffbahn 14 befestigt.For the purpose of assembly, the holding shaft 36 driven by the fabric web 14 is inserted into the interior of the pot 44 via the opening 45 and is riveted there firmly to this push-button part 13 by flanging the shaft end. As a result, the push button part 13 is fastened on the side of the fabric web 14 opposite the cap 10.

Eine alternative Ausgestaltungsmöglichkeit der Erfindung bestände darin, statt der dargestellten breitrandigen Kappe auch Kappen kleineren Durchmessers zu verwenden, deren Umfang bereits mit dem erwähnten Innenring 21 endet. In diesem Fall fallen die Stege 23 und der Aussenring 22 zusammen mit den Waben 25 weg. Auch dabei lässt sich erfindungsgemäss die Befestigungssicherheit durch die geschilderte Ausführung der zentralen Aussparung 20 und ihre erwähnte Wechselwirkung mit dem Endflansch 35 eines Halteteils 11 verbessern. In übriger Hinsicht kann die vorbeschriebene Gestaltung der Bauteile auch hier angewendet werden.An alternative embodiment of the invention would be to use caps of smaller diameter instead of the wide-rim cap shown, the scope of which already ends with the inner ring 21 mentioned. In this case, the webs 23 and the outer ring 22 together with the honeycomb 25 are eliminated. According to the invention, the fastening security can also be improved here by the described design of the central recess 20 and the aforementioned interaction with the end flange 35 of a holding part 11. In other respects, the above-described design of the components can also be used here.

Für die geschilderte Erweiterung des Durchmessers 40 des Endflansches 35 am Halteteil 11 bzw. 11', die sich beim Einebnen seiner Konizität während des Befestigungsvorgangs in der Kappe 10 ergibt, sind die Radialsicken 37 sehr günstig. In ihnen ist Werkstoff gespeichert, der bei dieser Einebnung für die Durchmessererweiterung zur Verfügung steht. Die Versteifungswirkung der Radialsicken 37 ergibt sich in radialer Richtung im Endflansch 35.The radial beads 37 are very favorable for the described expansion of the diameter 40 of the end flange 35 on the holding part 11 or 11 ', which results when its conicity is leveled during the fastening process in the cap 10. Material is stored in them, which is available for this leveling for the diameter expansion. The stiffening effect of the radial beads 37 results in the radial direction in the end flange 35.

Das geschilderte Überquetschen der im Kappenbereich 41 befindlichen Werkstoffbereiche 42 des Innenrings 21 kann auch segmentweise geschehen. Normalerweise erfolgt diese Quetschung durch eine Kaltstauchung. Bedarfsweise wird man aber auch eine Wärmeeinwirkung dazu nutzen, die z.B. durch ein Ultraschallfeld in diesem Bereich erzeugt ist.The described squeezing of the material areas 42 of the inner ring 21 located in the cap area 41 can also take place in segments. This crushing is normally done by cold upsetting. If necessary, you will also use a heat effect, e.g. is generated by an ultrasonic field in this area.

Claims (8)

1. A plastic cap (10) on the end flange (35) of a holding piece (11), such as a rivet, a pricking nail, a serrated ring, a sow-on eyelet, or the like, for notions, such as snap-fastener parts, reinforcing rivets, trouser hooks, buttons, ornamental parts or the like, wherein the cap (10) is provided at its bottom surface with a central recess (20) having undercut inner side walls (31), in which the conical end flange (35) is fixed by flattening of its taper, characterized in that the cap (10) has at its bottom side (16) a honeycomb structure (17) of a universally substantially uniform wall thickness (19), in which the recess (20) is included as a central honeycomb enclosed by an annular wall (21), the annular wall (21) on its inner side wall (31) carries axial ribs (30) reducing the inside width (32) of the recess, into which the flattened end flange (35) bites with its circumferential edge (39), and the plastic of the annular wall (21) in its summit area (41) is squeezed over the rim surface of the end flange (35).
2. A cap is claimed in the claim 1, characterized in that the honeycomb structure (17) provided on a base plate (15) of the cap (10) is designed to have the shape of a spoke wheel and consists of an inner ring (21) constituting the annular wall, an outer ring (22) extending longitudinally of the cap contour, and spoke webs (23) extending radially between the inner and the outer ring.
3. A cap as claimed in the claim 2, characterized in that the outer ring (22) has a stepped portion (24) at its outer circumferential rim, providing a continuous peripheral groove on the cap.
4. A cap as claimed in any one or several of the claims 1 to 3, characterized in that at least inside of one honeycomb (25) there is arranged a deadhead (18) serving to firmly position the cap (10) with respect to rotation during the fastening procedure.
5. A cap as claimed in any one or several of the claims 1 to 4, characterized in that the end flange (35) of the holding piece (11) is provided with radial beads (37) for its reinforcement.
6. A cap as claimed in any one or several of the claims 1 to 5, characterized in that the circumferential edge of the end flange (35') is provided with a toothing (43).
7. A cap as claimed in the claims 5 and 6, characterized in that the toothing is produced by the radial beads (37) extending to the circumferential edge of the end flange (35).
8. A cap as claimed in any one or several of the claims 1 to 6, characterized in that the end flange (35, 35') is fixed in the central honeycomb (20) by additional bonding agent.
EP83100428A 1982-03-27 1983-01-19 Plastic cap for fastener elements used in haberdashery, such as snap fasteners Expired EP0090131B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823211453 DE3211453A1 (en) 1982-03-27 1982-03-27 PLASTIC CAP ON HOLDING PARTS FOR RETAIL ITEMS LIKE PUSHBUTTON PARTS
DE3211453 1982-03-27

Publications (3)

Publication Number Publication Date
EP0090131A2 EP0090131A2 (en) 1983-10-05
EP0090131A3 EP0090131A3 (en) 1984-08-15
EP0090131B1 true EP0090131B1 (en) 1987-03-11

Family

ID=6159565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100428A Expired EP0090131B1 (en) 1982-03-27 1983-01-19 Plastic cap for fastener elements used in haberdashery, such as snap fasteners

Country Status (2)

Country Link
EP (1) EP0090131B1 (en)
DE (2) DE3211453A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249741A (en) * 1985-04-30 1986-11-06 Sanrain Kogyo:Kk Manufacture of button
DE8704351U1 (en) * 1987-03-24 1987-05-21 William Prym-Werke Gmbh & Co Kg, 5190 Stolberg, De
DE8710108U1 (en) * 1987-07-23 1987-09-17 William Prym-Werke Gmbh & Co Kg, 5190 Stolberg, De
DE8714192U1 (en) * 1987-10-24 1989-05-18 Schaeffer Gmbh, 5600 Wuppertal, De
JPH05123206A (en) * 1991-10-31 1993-05-21 Yoshida Kogyo Kk <Ykk> Decorative body with clasp of button and its manufacture
DE10322861A1 (en) * 2003-05-21 2004-12-16 Andrea Prym Design Prym-Bruck Jewelry for the human body or clothing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349448A (en) * 1965-06-02 1967-10-31 C & C Button & Trimming Co Inc Tufted back mold for fabric covered button
DE1807760A1 (en) * 1968-11-08 1970-09-24 Schaeffer Homberg Gmbh Plastic push button
DE2244633A1 (en) * 1972-09-12 1974-04-25 Luber Richard RELEASABLE BUTTON
DE2265156A1 (en) * 1972-12-04 1976-10-07 Schaeffer Homberg Gmbh Push button with mating and ornamental cover sections - has female section with plug opening suited to male projection

Also Published As

Publication number Publication date
DE3211453A1 (en) 1983-09-29
DE3370128D1 (en) 1987-04-16
EP0090131A2 (en) 1983-10-05
EP0090131A3 (en) 1984-08-15

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