EP0219633A1 - Injection-moulded thermoplastic toe cap - Google Patents

Injection-moulded thermoplastic toe cap Download PDF

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Publication number
EP0219633A1
EP0219633A1 EP86111046A EP86111046A EP0219633A1 EP 0219633 A1 EP0219633 A1 EP 0219633A1 EP 86111046 A EP86111046 A EP 86111046A EP 86111046 A EP86111046 A EP 86111046A EP 0219633 A1 EP0219633 A1 EP 0219633A1
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EP
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Prior art keywords
shoe cap
thermoplastic material
cap made
plate
material according
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Granted
Application number
EP86111046A
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German (de)
French (fr)
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EP0219633B1 (en
Inventor
Gunter Dipl.-Ing. Lube
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Bayer AG
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Bayer AG
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Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0219633A1 publication Critical patent/EP0219633A1/en
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Publication of EP0219633B1 publication Critical patent/EP0219633B1/en
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/081—Toe stiffeners
    • A43B23/086—Toe stiffeners made of impregnated fabrics, plastics or the like
    • A43B23/087—Toe stiffeners made of impregnated fabrics, plastics or the like made of plastics

Definitions

  • the invention relates to a molded shoe cap made of thermoplastic material for safety shoes, consisting of an end wall with side walls adjoining on both sides, the upper edges of which are connected by a plate and the lower edges of which are provided with edge strips, which in turn are connected via floor bolts or at least partially designed as a base plate .
  • Safety shoes that are worn when working, mountaineering and ice hockey, for example, are equipped with a sturdy shoe to prevent injuries to the forefoot caused by sudden forces such as falling objects.
  • the high requirements, such as those set out in DIN 4843, have so far only been met by steel caps, which, however, are not very comfortable due to the high weight and high thermal conductivity of steel.
  • the object of the invention is to find a light, comfortable, stable shoe toe, which does not lead to injury to the forefoot in the case of heavy sudden stress, as prescribed in particular by the drop wedge test according to DIN 4843, and which is as simple to manufacture as possible.
  • the object is achieved in that the front and side winds in the edge region of the plate are at least partially reinforced upwards by a bead which also serves to stiffen the corner surrounding there.
  • the weight is up to half smaller, which also makes it easier to wear heavy work shoes.
  • the plastic shoe cap also increases the feeling of comfort in the foot, since heat or cold are only dissipated slowly. Finally, the cap can be manufactured in one operation, which brings economic advantages to this mass product.
  • the walls In order to create clear static conditions, the walls have a groove just above the floor, so that the floor slab or floor latch are connected in an articulated manner, which means that these thin components are only subjected to tensile loads according to the design.
  • a shoe cap 1 is shown, in which the end wall 2 or side wall 3 is connected at the top by a plate 4 and at the bottom by an edge strip 5 to the bottom bar 6 or bottom plate 7.
  • the upper corner 8 is reinforced by a bead which delimits a space 10 with the plate 4.
  • the radii shown should not fall below certain values (for example 10 mm).
  • a shoe cap 1 is shown in which the end wall 2 or side wall 3 is connected at the top to a plate which, together with a bead 9 and the filling of the space 10, forms a uniform flat support body 12.
  • the end wall 2 is reinforced and provided with a groove 11 below.
  • the edge strip 5 is reinforced at the front with a base plate 7.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

1. Injection-moulded shoe cap made of thermoplastic for safety shoes, consisting of a reinforced front wall (2) with reinforced side walls (3) adjacent on both sides, the upper edges of which are joined by a plate (4) and the lower edges of which have edge strips (5) which can in turn be joined via a bottom bar (6) or at least partly constructed as a bottom plate (7), characterized in that the reinforcement of the front wall (2) and of the side walls (3) in the edge region of the plate (4) is formed at the top by a bulge (9) which is raised above the plate and at the same time is a stiffening for the corner (8) which turns at that point.

Description

Die Erfindung betrifft eine gespritzte Schuhkappe aus thermoplastischem Kunststoff für Sicherheitsschuhe, bestehend aus einer Stirnwand mit beidseitig anschließenden Seitenwänden, deren obere Ränder durch eine Platte verbunden und deren untere Ränder mit Randstreifen versehen sind, die wiederum über Bodenriegel verbunden oder mindestens teilweise als Bodenplatte ausgebildet sein können.The invention relates to a molded shoe cap made of thermoplastic material for safety shoes, consisting of an end wall with side walls adjoining on both sides, the upper edges of which are connected by a plate and the lower edges of which are provided with edge strips, which in turn are connected via floor bolts or at least partially designed as a base plate .

Sicherheitsschuhe, die beispielsweise beim Arbeiten, Bergsteigen und Eishockey getragen werden, sind mit einer festen Schuhkappe ausgerüstet, um Verletzung des Vorderfußes durch schlagartig auswirkende Kräfte - wie herabfallende Gegenstände - zu vermeiden. Die hohen Anforderungen, wie sie unter anderem in der DIN 4843 gestellt werden, erfüllten bisher nur Stahlkappen, die aber wegen des großen Gewichtes und der hohen Wärmeleitfähigkeit von Stahl nicht sehr fußbehaglich sind.Safety shoes that are worn when working, mountaineering and ice hockey, for example, are equipped with a sturdy shoe to prevent injuries to the forefoot caused by sudden forces such as falling objects. The high requirements, such as those set out in DIN 4843, have so far only been met by steel caps, which, however, are not very comfortable due to the high weight and high thermal conductivity of steel.

Aufgabe der Erfindung ist es, eine leichte, fußbehagliche, stabile Schuhkappe zu finden, die bei starker schlagartiger Beanspruchung, wie sie insbesondere der Fallkeiltest gemäß DIN 4843 vorschreibt, nicht zur Verletzung des Vorderfußes führt und die möglichst einfach herzustellen ist. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Stirn- und Seitenwinde im Randbereich der Platte nach oben mindestens teilweise durch einen Wulst verstärkt sind, der gleichzeitig zur Versteifung der dort umlaufenden Ecke dient.The object of the invention is to find a light, comfortable, stable shoe toe, which does not lead to injury to the forefoot in the case of heavy sudden stress, as prescribed in particular by the drop wedge test according to DIN 4843, and which is as simple to manufacture as possible. The object is achieved in that the front and side winds in the edge region of the plate are at least partially reinforced upwards by a bead which also serves to stiffen the corner surrounding there.

Durch die Erhöhung und Verbreiterung der oberen Platte mit einem Wulst im Bereich oberhalb der Stirn- bzw. Seitenwand unter gleichzeitiger Aussteifung der Ecke Wand und Platte entsteht ein rahmenartiges Tragwerk aus einzelnen Flächen, welches wegen der räumlichen Anordnung und der Eckausbildung außerordentlich steif ist, so daß Kräfte auch von sehr harten Stößen aufgenommen und sicher über die Wände in die Sohle geleitet werden.By raising and widening the upper plate with a bead in the area above the front or side wall while simultaneously bracing the corner wall and plate, a frame-like structure is created from individual surfaces, which is extremely stiff due to the spatial arrangement and the corner formation, so that Forces are also absorbed by very hard impacts and are safely guided over the walls into the sole.

Trotz einer Verdickung gegenüber dem Stahl (maximale Höhe 6 - 8 - 12 mm, Wulstbreite 8 - 20 mm) ist das Gewicht bis zur Hälfte kleiner, was das Tragen auch von schweren Arbeitsschuhen erleichtert. Auch hebt die Kunststoff-Schuhkappe das Behaglichkeitsgefühl des Fußes, da Wärme oder Kälte nur langsam abgeleitet werden. Schließlich kann die Kappe in einem Arbeitsgang gefertigt werden, was bei diesem Massenprodukt wirtschaftliche Vorteile bringt.Despite a thickening compared to the steel (maximum height 6 - 8 - 12 mm, bead width 8 - 20 mm), the weight is up to half smaller, which also makes it easier to wear heavy work shoes. The plastic shoe cap also increases the feeling of comfort in the foot, since heat or cold are only dissipated slowly. Finally, the cap can be manufactured in one operation, which brings economic advantages to this mass product.

Weitere Ausführungsformen sind in den Unteransprüchen beschrieben.Further embodiments are described in the subclaims.

So kann durch Verjüngung des Wulstes in Richtung des freien Endes der Seitenwand ein fließender Übergang zum Hinterteil des Schuhes geschaffen werden, was das Aussehen und die Umkleidung mit Leder erleichtert.By tapering the bead in the direction of the free end of the side wall, a smooth transition to the rear of the shoe can be created, which facilitates the appearance and the cladding with leather.

Vorteilhaft ist auch, insbesondere die Stirnwand zu verdicken, da hierdurch horizontale Stöße in Höhe des Schuhes aufgefangen werden. Gleichzeitig wird hierdurch die räumliche Rahmenwirkung verbessert.It is also advantageous to thicken the end wall, in particular, since this absorbs horizontal bumps at the level of the shoe. At the same time, this improves the spatial framework effect.

Um klare statische Verhältnisse zu schaffen, besitzen die Wände kurz über dem Boden einen Nut, so daß die Bodenplatte bzw. Bodenriegel gelenkig angeschlossen sind, wodurch diese dünnen Bauteile konstruktionsgerecht nur auf Zug beansprucht werden.In order to create clear static conditions, the walls have a groove just above the floor, so that the floor slab or floor latch are connected in an articulated manner, which means that these thin components are only subjected to tensile loads according to the design.

Durch Auffüllen der Vertiefung, die von dem Wulst und der Platte gebildet wird, kann die Sicherheit insbesondere bei senkrechtem Fall von spitzen Gegenständen erhöht werden. Dieser Raum kann gleich beim Spritzen mit demselben Material, das auch für die Schuhkappe verwendet wird, ausgefüllt werden. Denkbar ist aber auch, in den Raum elastischen Kunststoff einzubringen, der ein hohes Energieaufnahmevermögen besitzt. Schließlich kann aber auch eine später montierbare federnde Konstruktion eingebaut werden.By filling up the depression formed by the bead and the plate, safety can be increased, in particular in the case of a vertical drop of pointed objects. This space can be filled when spraying with the same material that is used for the shoe cap. However, it is also conceivable to introduce elastic plastic into the room, which has a high energy absorption capacity. Finally, a resilient construction that can be installed later can also be installed.

Als Kunststoff hat sich ein Makrolon-Typ mit folgenden Eigenschaften bewährt:

Figure imgb0001
A Makrolon type with the following properties has proven itself as a plastic:
Figure imgb0001

Beispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden erläutert. Es zeigen

  • Fig. 1 Draufsicht auf Schuhkappe mit Wulst
  • Fig. 2 Schnitt durch Schuhkappe mit Wulst
  • Fig. 3 Draufsicht auf komplett gespritzte Schuhkappe
  • Fig. 4 Schnitt durch komplett gespritzte Schuhkappe
Examples of the invention are shown in the drawings and are explained below. Show it
  • Fig. 1 top view of shoe cap with bead
  • Fig. 2 section through shoe cap with bead
  • Fig. 3 top view of completely molded shoe cap
  • Fig. 4 section through completely molded shoe cap

Zu Fig. 1 und 2 ist eine Schuhkappe 1 dargestellt, bei der die Stirnwand 2 bzw. Seitenwand 3 oben durch eine Platte 4 und unten durch einen Randstreifen 5 mit Bodenriegel 6 bzw. Bodenplatte 7 verbunden ist.1 and 2, a shoe cap 1 is shown, in which the end wall 2 or side wall 3 is connected at the top by a plate 4 and at the bottom by an edge strip 5 to the bottom bar 6 or bottom plate 7.

Die obere Ecke 8 ist durch einen Wulst verstärkte der mit der Platte 4 einen Raum 10 begrenzt. Die eingezeichneten Radien sollten bestimmte Werte (beispielsweise 10 mm) nicht unterschreiten.The upper corner 8 is reinforced by a bead which delimits a space 10 with the plate 4. The radii shown should not fall below certain values (for example 10 mm).

In Fig. 3 und 4 ist eine Schuhkappe 1 dargestellte bei der die Stirnwand 2 bzw. Seitenwand 3 oben mit einer Platte verbundon ist, die zusammen mit einem Wulst 9 und der Ausfüllung des Raumes 10 einen einheitlichen flächigen Tragkörper 12 bildet. Die Stirnwand 2 ist verstärkt und unten mit einem Nut 11 versehen. Der Randstreifen 5 ist vorne mit einer Bodenplatte 7 verstärkt.3 and 4, a shoe cap 1 is shown in which the end wall 2 or side wall 3 is connected at the top to a plate which, together with a bead 9 and the filling of the space 10, forms a uniform flat support body 12. The end wall 2 is reinforced and provided with a groove 11 below. The edge strip 5 is reinforced at the front with a base plate 7.

Claims (8)

1) Gespritzte Schuhkappe aus thermoplastischem Kunststoff für Sicherheitsschuhe, bestehend aus einer Stirnwand mit beidseitig anschließenden Seitenwänden, deren obere Ränder durch eine Platte verbunden, und deren untere Ränder mit Randstreifen versehen sind, die wiederum Über Bodenriegel verbunden oder mindestens teilweise als Bodenplatte ausgebildet sein können, dadurch gekennzeichnet, daß die Stirn und Seitenwände (2, 3) im Randbereich der Platte (4) nach oben mindestens teilweise durch einen Wulst (9) verstärkt sind, der gleichzeitig zur Versteifung der dort umlaufenden Ecke (8) dient.1) Molded shoe cap made of thermoplastic material for safety shoes, consisting of an end wall with side walls adjoining on both sides, the upper edges of which are connected by a plate, and the lower edges of which are provided with edge strips, which in turn are connected via floor bolts or at least partially designed as a base plate, characterized in that the front and side walls (2, 3) in the edge region of the plate (4) are at least partially reinforced upwards by a bead (9) which at the same time serves to stiffen the corner (8) surrounding it. 2) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 1, dadurch gekennzeichnet, daß der Wulst (9) mit der Entfernung von der Stirnwand (2) ver jüngt ist.2) molded shoe cap made of thermoplastic material according to claim 1, characterized in that the bead (9) with the distance from the end wall (2) is tapered ver. 3) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 1 - 2, dadurch gekennzeichnet, daß die Stirn- und/oder Seitenwand <2, 3) eine Stärke von 4 - 8 mm besitzt.3) Injected shoe cap made of thermoplastic material according to claim 1-2, characterized in that the front and / or side wall <2, 3) has a thickness of 4-8 mm. 4) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 1 - 3, dadurch gekennzeichnet, daß Stirnwand und/oder Seitenwand (2, 3) im Übergang zur Bodenplatte (7) bzw. Randstreifen (5) eine umlaufende Nut (11) besitzen.4) Injected shoe cap made of thermoplastic material according to claims 1-3, characterized in that the end wall and / or side wall (2, 3) in the transition to the base plate (7) or edge strips (5) have a circumferential groove (11). 5) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 1 - 4, dadurch gekennzeichnet, daß sich im Raum (10) über den Platte (4) bis etwa in Höhe des Wulstes (9) Material befindet.5) Injected shoe cap made of thermoplastic material according to claim 1-4, characterized in that there is material in the space (10) above the plate (4) up to about the height of the bead (9). 6) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 5, dadurch gekennzeichnet, daß das Material hohe Dämpfungseigenschaften besitzt.6) molded shoe cap made of thermoplastic material according to claim 5, characterized in that the material has high damping properties. 7) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 5 - 6, dadurch gekennzeichnet, daß das Material in Form einer stoßdämpfenden Konstruktion verarbeitet ist.7) molded shoe cap made of thermoplastic material according to claim 5-6, characterized in that the material is processed in the form of a shock-absorbing construction. 8) Gespritzte Schuhkappe aus thermoplastischem Kunststoff nach Anspruch 1 - 7, dadurch gekennzeichnet, daß die Schuhkappe (1) aus Polycarbonat auf der Basis Bisphenol A mit Faserverstärkung von 5-30 Gew.-X, insbesondere von 8-15 Gew.-X und einem Schlagzähmodifikatorzusatz besteht.8) Injected shoe cap made of thermoplastic material according to claims 1-7, characterized in that the shoe cap (1) made of polycarbonate based on bisphenol A with fiber reinforcement of 5-30 Gew.-X, in particular 8-15 Gew.-X and there is an impact modifier additive.
EP86111046A 1985-08-22 1986-08-09 Injection-moulded thermoplastic toe cap Expired EP0219633B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853529999 DE3529999A1 (en) 1985-08-22 1985-08-22 INJECTED SHOE TOE MADE OF THERMOPLASTIC PLASTIC
DE3529999 1985-08-22

Publications (2)

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EP0219633A1 true EP0219633A1 (en) 1987-04-29
EP0219633B1 EP0219633B1 (en) 1989-09-20

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Family Applications (1)

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EP86111046A Expired EP0219633B1 (en) 1985-08-22 1986-08-09 Injection-moulded thermoplastic toe cap

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EP (1) EP0219633B1 (en)
JP (1) JPS6247301A (en)
DE (2) DE3529999A1 (en)
ES (1) ES2001386A6 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320312A1 (en) * 1992-07-02 1994-01-13 Yoshida Kogyo Kk Fibre reinforced toe cap for safety shoe - is made of plastics and has border curving inwards from lower part of front end part and opposite facing sides
WO2022179693A1 (en) 2021-02-26 2022-09-01 GÖSSEL, Thorsten Protective cap for footwear

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2081765B1 (en) * 1994-05-06 1996-11-01 Iturri S A MANUFACTURING PROCEDURE FOR FOOT AND TOE PROTECTION POINTS OBTAINED WITH SUCH PROCEDURE.
DE20018977U1 (en) 2000-11-08 2001-02-15 Kunststoffverarbeitung Wilhelm GmbH, 66981 Münchweiler Toe cap for safety, protective or professional shoes
DE10114560A1 (en) * 2001-03-24 2002-09-26 Uvex Arbeitsschutz Gmbh Protective shoe, safety shoe or boot
DE20106350U1 (en) * 2001-04-11 2002-08-14 Uvex Arbeitsschutz GmbH, 90766 Fürth Protective shoe, safety shoe or boot
DE20106351U1 (en) * 2001-04-11 2002-08-14 Uvex Arbeitsschutz GmbH, 90766 Fürth Protective shoe, safety shoe or boot

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021612A1 (en) * 1979-06-08 1981-01-07 Firth Cleveland Engineering Limited Protective toe cap
GB2071989A (en) * 1980-03-21 1981-09-30 Britton Ltd G B Protective toe caps for footwear
FR2525443A1 (en) * 1982-04-23 1983-10-28 Agulhon Michel Protective toe cap for safety shoe - which has shell open at bottom and with back made of polycarbonate with mineral fibres
EP0100181A1 (en) * 1982-07-28 1984-02-08 Imperial Chemical Industries Plc Protective toe caps

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB511324A (en) * 1938-07-09 1939-08-16 John Broughton An improved protector for the toes of boots and shoes
DE1229879B (en) * 1960-06-22 1966-12-01 Baudou Soc D Expl Des Ets Safety footwear made of rubber or plastic
CH501382A (en) * 1968-03-12 1971-01-15 Semperit Ag Light company shoe
DE1809766A1 (en) * 1968-11-19 1970-06-04 Ariston Gmbh Schuhzubehoer Protective shield for safety shoes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021612A1 (en) * 1979-06-08 1981-01-07 Firth Cleveland Engineering Limited Protective toe cap
GB2071989A (en) * 1980-03-21 1981-09-30 Britton Ltd G B Protective toe caps for footwear
FR2525443A1 (en) * 1982-04-23 1983-10-28 Agulhon Michel Protective toe cap for safety shoe - which has shell open at bottom and with back made of polycarbonate with mineral fibres
EP0100181A1 (en) * 1982-07-28 1984-02-08 Imperial Chemical Industries Plc Protective toe caps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320312A1 (en) * 1992-07-02 1994-01-13 Yoshida Kogyo Kk Fibre reinforced toe cap for safety shoe - is made of plastics and has border curving inwards from lower part of front end part and opposite facing sides
WO2022179693A1 (en) 2021-02-26 2022-09-01 GÖSSEL, Thorsten Protective cap for footwear

Also Published As

Publication number Publication date
DE3665660D1 (en) 1989-10-26
DE3529999A1 (en) 1987-02-26
JPS6247301A (en) 1987-03-02
EP0219633B1 (en) 1989-09-20
ES2001386A6 (en) 1988-05-16

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