EP0219633B1 - Injection-moulded thermoplastic toe cap - Google Patents

Injection-moulded thermoplastic toe cap Download PDF

Info

Publication number
EP0219633B1
EP0219633B1 EP86111046A EP86111046A EP0219633B1 EP 0219633 B1 EP0219633 B1 EP 0219633B1 EP 86111046 A EP86111046 A EP 86111046A EP 86111046 A EP86111046 A EP 86111046A EP 0219633 B1 EP0219633 B1 EP 0219633B1
Authority
EP
European Patent Office
Prior art keywords
injection
shoe cap
plate
moulded
thermoplastic according
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
EP86111046A
Other languages
German (de)
French (fr)
Other versions
EP0219633A1 (en
Inventor
Gunter Dipl.-Ing. Lube
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.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0219633A1 publication Critical patent/EP0219633A1/en
Application granted granted Critical
Publication of EP0219633B1 publication Critical patent/EP0219633B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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 a reinforced front wall with reinforced 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 can.
  • 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 great weight and high thermal conductivity of steel.
  • shoe cap of the presupposed type made of fiber-reinforced plastic EP-A-0 021 612
  • 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 reinforcement of the end wall and the side walls in the edge region of the plate is formed upwards by a bulge raised above the plate, which at the same time represents a stiffening of the corner surrounding it.
  • the weight is up to half smaller, which makes it easier to wear even 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.
  • the safety can be increased, in particular at normal case of sharp objects.
  • Elastic plastic which has a high energy absorption capacity, can preferably be introduced into the room.
  • a resilient construction that can be installed later can also be installed.
  • 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 9 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 with a plate which, together with a bead 9 and the filling of the space 10, forms a flat supporting 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.

Landscapes

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

Description

Die Erfindung betrifft eine gespritzte Schuhkappe aus thermoplastischem Kunststoff für Sicherheitsschuhe bestehend aus einer verstärkten Stirnwand mit beidseitig anschließenden verstärkten 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 a reinforced front wall with reinforced 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 can.

Sicherheitsschuhe, die beispielsweise beim Arbeiten, Bergsteigen und Eishockey getragen werden, sind mit einer festen Schuhkappe ausgerüstet, um Verletzungen des Vorderfußes durch schlagartig einwirkende 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 great weight and high thermal conductivity of steel.

Bekannt ist auch eine Schuhkappe der vorausgesetzten Art aus faserverstärktem Kunststoff (EP-A-0 021 612), deren verstärkte Spitze in einen Hauptteil gleichbleibender Stärke übergeht, wobei ein integrierter Flansch die untere Ecke verstärkt.Also known is a shoe cap of the presupposed type made of fiber-reinforced plastic (EP-A-0 021 612), the reinforced tip of which merges into a main part of constant strength, with an integrated flange reinforcing the lower corner.

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.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.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Verstärkung der Stirnwand und der Seitenwände im Randbereich der Platte nach oben über durch einen über die Platte erhabenen Wulst gebildet ist, der zugleich eine Versteifung der dort umlaufenden Ecke darstellt.The object is achieved in that the reinforcement of the end wall and the side walls in the edge region of the plate is formed upwards by a bulge raised above the plate, which at the same time represents a stiffening of the corner surrounding it.

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 makes it easier to wear even 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 abhängigen Ansprüchen 2-8 beschrieben.Further embodiments are described in dependent claims 2-8.

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. Vorzugsweise läßt sich in den Raum elastischer Kunststoff einbringen, der ein hohes Energieaufnahmevermögen besitzt. Es kann aber auch eine später montierbare federnde Konstruktion eingebaut werden.By filling the recess, which is formed by the bead and the plate, 'the safety can be increased, in particular at normal case of sharp objects. Elastic plastic, which has a high energy absorption capacity, can preferably be introduced into the room. However, a resilient construction that can be installed later can also be installed.

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

  • (Siehe Tabelle Seite 3 f.)
A polycarbonate type with the following properties has proven itself as a plastic:
  • (See table on page 3 f.)

Beispiele der neuen Schuhkappe 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 new shoe cap 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 9 verstärkt, 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 9 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 dargestellt, bei der die Stirnwand 2 bzw. Seitenwand 3 oben mit einer Platte verbunden ist, die zusammen mit einem Wulst 9 und der Ausfüllung des Raumes 10 einen flächigen Tragkörper 12 bildet. Die Stirnwand 2 ist verstärkt und unten mit einer Nut 11 versehen. Der Randstreifen 5 ist vorne mit einer Bodenplatte 7 verstärkt.

Figure imgb0001
3 and 4, a shoe cap 1 is shown, in which the end wall 2 or side wall 3 is connected at the top with a plate which, together with a bead 9 and the filling of the space 10, forms a flat supporting 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.
Figure imgb0001

Claims (8)

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.
2. Injection-moulded shoe cap made of thermoplastic according to claim 1, characterized in that the bulge (9) tapers away from the front wall (2).
3. Injection-moulded shoe cap of thermoplastic according to claims 1-2, characterized in that the front and/or side wall (2, 3) has a thickness of 4-8 mm.
4. Injection-moulded shoe cap of thermoplastic according to claims 1-3, characterized in that the front wall and/or side wall (2, 3) has a surrounding groove (11) in the transition to the bottom plate (7) or edge strips (5).
5. Injection-moulded shoe cap made of thermoplastic according to claims 1-4, characterized in that there is an elastic plastic in the space (10) above the plate (4) up to about the level of the bulge (9).
6. Injection-moulded shoe cap made of thermoplastic according to claim 5, characterized in that the material has high damping properties.
7. Injection-moulded shoe cap made of thermoplastic according to claims 5-6, characterized in that the material is worked in the form of a shock-absorbing construction.
8. Injection-moulded shoe cap made of thermoplastic according to claims 1-7, characterized in that the shoe cap (1) consists of polycarbonate based on bisphenol A with fibre reinforcement of 5-30 wt.%, in particular 8-15 wt.%, and an impact strength 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)

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

Family

ID=6279086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111046A Expired EP0219633B1 (en) 1985-08-22 1986-08-09 Injection-moulded thermoplastic toe cap

Country Status (4)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320312C2 (en) * 1992-07-02 1997-02-20 Ykk Corp Safety cap and safety shoe
ES2081765B1 (en) * 1994-05-06 1996-11-01 Iturri S A MANUFACTURING PROCEDURE FOR FOOT AND TOE PROTECTION POINTS OBTAINED WITH SUCH PROCEDURE.
DE10114560A1 (en) * 2001-03-24 2002-09-26 Uvex Arbeitsschutz Gmbh Protective shoe, safety shoe or boot
DE20106351U1 (en) * 2001-04-11 2002-08-14 Uvex Arbeitsschutz Gmbh Protective shoe, safety shoe or boot
DE20106350U1 (en) * 2001-04-11 2002-08-14 Uvex Arbeitsschutz Gmbh Protective shoe, safety shoe or boot
WO2022179693A1 (en) 2021-02-26 2022-09-01 GÖSSEL, Thorsten Protective cap for footwear

Family Cites Families (8)

* 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
DE3065511D1 (en) * 1979-06-08 1983-12-15 Firth Cleveland Eng Protective toe cap
GB2071989B (en) * 1980-03-21 1984-11-28 Britton Ltd G B Protective toe caps for footwear
FR2525443B1 (en) * 1982-04-23 1986-04-18 Agulhon Michel TOE FOR SAFETY SHOES
EP0100181A1 (en) * 1982-07-28 1984-02-08 Imperial Chemical Industries Plc Protective toe caps

Also Published As

Publication number Publication date
EP0219633A1 (en) 1987-04-29
DE3665660D1 (en) 1989-10-26
JPS6247301A (en) 1987-03-02
ES2001386A6 (en) 1988-05-16
DE3529999A1 (en) 1987-02-26

Similar Documents

Publication Publication Date Title
AT402680B (en) SHOCK-ABSORBING, ENERGY-SAVING HEEL SPRING AND STABILIZATION DEVICE FOR A SPORTSHOE H
DE19953147B4 (en) Shock absorber structure for shoe soles
EP0348424B1 (en) Sports shoe with elastic heel counter
DE3318121A1 (en) SHOE SOLE
DE3619387A1 (en) SOLE
CH638962A5 (en) CROSS-COUNTRY SKI BOOT.
DE102008033241B3 (en) sole
EP1166671B1 (en) Insole
EP0219633B1 (en) Injection-moulded thermoplastic toe cap
DE2854567A1 (en) SPORTSHOE, ESPECIALLY FOR CROSS-COUNTRY AND TENNIS
EP0295417B1 (en) Composite building slab, particularly for sectional false floors
DE69827050T2 (en) The sliding board
DE2457676A1 (en) BUMPER, IN PARTICULAR FOR A MOTOR VEHICLE
DE6943965U (en) ARMREST FOR THE INTERIOR OF A MOTOR VEHICLE
CH646336A5 (en) SKI.
DE3046677A1 (en) LEG PROTECTION FOR THE INSIDE OF A MOTOR VEHICLE
DE4320312C2 (en) Safety cap and safety shoe
DE2908023A1 (en) Composite high heel for ladies shoes - has shock-absorbing resilient intermediate layer fixed to prevent horizontal displacement
DE602005005508T2 (en) PROTECTIVE PADDING FOR THE LOWER LIMBS OF A CAR INTAKE
WO1991002675A1 (en) Track for tracked vehicle
DE4219152C3 (en) Impeded shoe heel
DE8602071U1 (en) Safety footwear
AT235722B (en) Wedge sole for shoes or the like.
DE855977C (en) Collapsible container
DE1506535C3 (en) Elastic underlay for crane runway rails

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19860809

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19880919

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3665660

Country of ref document: DE

Date of ref document: 19891026

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950727

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950731

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960709

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960809

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960809

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050809