CH645510A5

CH645510A5 - PLASTIC FOOTWEAR.

Info

Publication number: CH645510A5
Application number: CH472480A
Authority: CH
Inventors: Igal Tovim
Original assignee: Igal Tovim
Priority date: 1979-07-02
Filing date: 1980-06-19
Publication date: 1984-10-15
Also published as: DE3023525A1; AT379053B; IT8068037A0; PT66655B1; MX152306A; SE7905778L; ZA803572B; ES493034A0; IN154311B; PT66655A1; FR2460619A2; ATA345880A; BR8004112A; DK283280A; FR2460619B2; ES8106399A2; IL60377A; IL60377A0; IT1128842B; AU529585B2

Description

Die Erfindung betrifft ferner ein Verfahren zum Beschlagen eines Pferdehufes mit einem Kunststoffhufbeschlag gemäss der Kennzeichnung des Patentanspruchs 22. The invention further relates to a method for shoeing a horse's hoof with a plastic shoeing according to the characterizing part of claim 22.

Die Verbindung von Bodenstück und Kappenstreifen erfolgt vorzugsweise durch Hitzeschweissung, wobei die Temperatur der beiden zu verbindenden Teile erhöht wird und diese beiden Teile anschliessend gegeneinander gepresst werden. Während des letzteren Vorganges verhindern die bereits anfänglich verbundenen Zehenbereiche von Bodenstück und Kappenstreifen eine Relativbewegung dieser Teile, was die Bildung einer starken und zuverlässigen Verbindung zwischen ihnen wesentlich erleichtert. The connection between the base piece and the cap strip is preferably carried out by heat welding, the temperature of the two parts to be connected being increased and these two parts subsequently being pressed against one another. During the latter process, the toe areas of the base piece and the cap strip which were initially connected prevent relative movement of these parts, which considerably facilitates the formation of a strong and reliable connection between them.

Ausführungsbeispiele der Erfindung werden im folgen-dèn anhand von Figuren beispielsweise näher erläutert; es zeigen: Exemplary embodiments of the invention are explained in more detail below with the aid of figures, for example; show it:

Fig. 1 eine Seitenansicht eines Pferdehufes nach dem Beschlagen mit einem Kunststoffhufbeschlag; Figure 1 is a side view of a horse's hoof after shoeing with a plastic shoeing.

Fig. 2 eine perspektivische Ansicht einer Ausführung des Beschlags gemäss Fig. 1; FIG. 2 shows a perspective view of an embodiment of the fitting according to FIG. 1;

Fig. 3 einen Teilschnitt durch den Beschlag gemäss Fig. 2; 3 shows a partial section through the fitting according to FIG. 2;

Fig. 4 einen Schnitt entlang der Linie IV-IV gemäss Fig. 3, und zwar durch die Übergangsstelle von zwei Beschlagteilen vor deren Verbindung; 4 shows a section along the line IV-IV according to FIG. 3, namely through the transition point of two fitting parts before their connection;

Fig. 5 einen Schnitt entlang der Linie V-V in Fig. 3, und zwar wiederum durch die Schnittstelle zwischen den beiden Beschlagteilen vor deren Verbindung; 5 shows a section along the line V-V in FIG. 3, again through the interface between the two fitting parts before their connection;

Fig. 6 einen Schnitt entlang der Linie VI-VI gemäss Fig. 3; 6 shows a section along the line VI-VI according to FIG. 3;

Fig. 7 eine Rückansicht in Richtung des Pfeils VII in Fig. 5 gesehen; Fig. 7 seen a rear view in the direction of arrow VII in Fig. 5;

Fig. 8 eine teilweise geschnittene Draufsicht auf eine zweite Ausführung der Erfindung; 8 is a partially sectioned top view of a second embodiment of the invention;

Fig. 9 einen Schnitt entlang der Linie IX-IX gemäss Fig. 8; 9 shows a section along the line IX-IX according to FIG. 8;

Fig. 10 eine Draufsicht auf eine dritte Ausführung der Erfindung; und 10 is a top view of a third embodiment of the invention; and

Fig. 11 eine Rückansicht in Richtung des Pfeils XI gemäss Fig. 10. 11 is a rear view in the direction of arrow XI according to FIG. 10.

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Fig. 1 zeigt einen Pferdehuf 10 mit einem Hornschuh 11 aus Keratin, der im Zehenbereich eine Vorderwand 12 aufweist, die in eine Seitenwand oder Trachte 13 übergeht. Die Trachte 13 läuft zum Ballen 14. Zwischen den Trachten 13 liegt der nicht erkennbare Strahl, während der Aussenrand der Sohle als Hornschuh bezeichnet wird. Beim Befestigen von bekannten Hufeisen werden Nägel in den Hornschuh getrieben, die aus der Zehe und den Trachten austreten; die ausgetretenen Teile werden abgekniffen und umgeschlagen. 1 shows a horse's hoof 10 with a horn shoe 11 made of keratin, which has a front wall 12 in the toe area which merges into a side wall or heel 13. The heel 13 runs to the ball 14. The undetectable beam lies between the heels 13, while the outer edge of the sole is referred to as a horn shoe. When fastening known horseshoes, nails are driven into the horn shoe, which emerge from the toe and the heels; the spilled parts are pinched off and turned over.

Die Fig. 1 bis 6 zeigen einen Kunststoff-Hufbeschlag mit einem indirekt am Hornschuh 11 befestigten Bodenstück 15, wobei ein im Querschnitt im wesentlichen L-förmiger Kappenstreifen 16 an der Zehe und an den Trachten befestigt ist. Der Streifen 16 ist derart vorgeformt, dass er etwa der Hufform angepasst ist. Er besteht aus relativ flexiblem Material, so dass er zum dichten Anliegen an den Hornschuh verformbar ist. Das Bodenstück 15 ist im Vergleich zum Streifen 16 verhältnismässig wenig flexibel und im Zehenbereich durch Heissschweissung bereits vor dem Anlegen an einen Huf mit dem Streifen 16 verschweisst. Man erkennt aus Fig. 3, dass der Kappenstreifen 16 im Zehenbereich des Laufteils gegenüber dem übrigen Wandungsbereich verstärkt ist, so dass in diesem Bereich Vorsorge gegen Verschleiss getroffen ist. Wegen der beim Laufen auftretenden Bewegungs- und Belastungsverhältnisse soll der Streifen gegenüber der Stirnseite des Bodenstücks gemäss Fig. 3 etwas vorstehen. 1 to 6 show a plastic horseshoe with a bottom piece 15 indirectly attached to the horn shoe 11, a cap strip 16 having an essentially L-shaped cross section being attached to the toe and to the heels. The strip 16 is preformed in such a way that it is adapted approximately to the shape of the hoof. It consists of a relatively flexible material so that it can be deformed to fit tightly against the horn shoe. The base piece 15 is comparatively little flexible in comparison to the strip 16 and is welded to the strip 16 in the toe area by hot welding even before it is put on a hoof. It can be seen from FIG. 3 that the cap strip 16 is reinforced in the toe area of the running part compared to the rest of the wall area, so that provision is made for wear in this area. Because of the movement and load conditions that occur during running, the strip should protrude somewhat from the end face of the base piece according to FIG. 3.

Die Materialauswahl für den Kappenstreifen 16 und das Bodenstück 15 ist für die Erzielung der gewünschten Eigenschaften von grosser Bedeutung. Das Bodenstück 15 muss unflexibel und vorzugsweise sowohl hart als auch abriebfest sein, es muss sich aber auch gut mit dem Kappenstreifen 16 verbinden lassen. Hingegen muss der Kappenstreifen 16 flexibel bzw. elastisch sein, um ein dichtes Anliegen an dem Hornschuh 11 zu gestatten. Ausserdem muss er durch Verkleben an dem aus Keratin bestehenden Hornschuh befestigbar sein. Ferner soll der Streifen 16 zumindest etwas elastisch sein, um eine gewisse Stossdämpfung zu bewirken. Dies ist insbesondere für harte Strassen von Vorteil und hilft ausserdem, die auf den Klebstoff einwirkenden Scher- und Schälkräfte zu vermindern. The choice of material for the cap strip 16 and the base piece 15 is of great importance for achieving the desired properties. The base piece 15 must be inflexible and preferably both hard and abrasion-resistant, but it must also be able to be connected well to the cap strip 16. On the other hand, the cap strip 16 must be flexible or elastic in order to allow a tight fit against the horn shoe 11. In addition, it must be attachable to the horn shoe made of keratin by gluing. Furthermore, the strip 16 should be at least somewhat elastic in order to bring about a certain amount of shock absorption. This is particularly advantageous for hard roads and also helps to reduce the shear and peeling forces acting on the adhesive.

Verschiedene Qualitäten von Polyurethanelastomeren sind für die beiden Teile des Hufbeschlags geeignet. Für das Bodenstück hat sich ein Stoff mit einer Shore'A'-Härte von im wesentlichen 93, für den Kappenstreifen von im wesentlichen 85 als zweckmässig erwiesen. Different qualities of polyurethane elastomers are suitable for the two parts of the horseshoe. A material with a Shore'A 'hardness of essentially 93 has proven to be expedient for the base piece, and essentially 85 for the cap strip.

Um den Streifen 16 so flexibel wie möglich zu halten, ist die Aussenfläche seines die Zehe und die Trachten des Hufes überdeckenden Flansches 18 mit einer Vielzahl von Nuten 19 versehen, die zusammen ein Zickzackmuster bilden. Zur weiteren Erhöhung der Flexibilität des Flansches 18 sind in einer Ausführung Löcher vorgesehen. Ausserdem verjüngt sich die Wandstärke des Flansches 18 in Richtung auf das freie, obere Ende, während der andere an der Sohle des Hufes anliegende Flansch 20 vier eingeformte Nuten 21 aufweist, die ein enges Anliegen des Sohlenbereichs an den Rand der Trachten unterstützen. Auf diese Weise kann eine Streifenform für unterschiedliche Hufformen und -grossen verwendet werden, während trotzdem ein enges Anliegen des Flansches 18 an den Hornschuh gewährleistet wird. In order to keep the strip 16 as flexible as possible, the outer surface of its flange 18 covering the toe and the heel of the hoof is provided with a plurality of grooves 19 which together form a zigzag pattern. To further increase the flexibility of the flange 18, holes are provided in one embodiment. In addition, the wall thickness of the flange 18 tapers in the direction of the free, upper end, while the other flange 20, which lies against the sole of the hoof, has four molded-in grooves 21, which support a tight fit of the sole area to the edge of the heels. In this way, a stripe shape can be used for different hoof shapes and sizes, while still ensuring that the flange 18 fits tightly against the horn shoe.

Gemäss den Fig. 1 bis 6 erstrecken sich drei Öffnungen 22 durch den Flansch 18, die unmittelbar anschliessend an den anderen Flansch 20 des Streifens liegen. Diese Öffnungen 22 erfüllen einen doppelten Zweck: Sie lassen Flüssigkeit oder halbflüssige Stoffe wie Schlamm durch die pumpende Einwirkung des vom Pferd belasteten Hufes austreten und ferner führen sie beim Ankleben des Flansches 18 anfallenden überschüssigen Klebstoff ab, wodurch eine bessere Bindung aufgrund minimaler Klebeschichtstärke erzielt wird. According to FIGS. 1 to 6, three openings 22 extend through the flange 18, which are immediately adjacent to the other flange 20 of the strip. These openings 22 serve a dual purpose: they allow liquid or semi-liquid substances such as mud to escape through the pumping action of the hoof loaded by the horse and, furthermore, they remove excess glue accumulated when the flange 18 is glued on, as a result of which a better bond is achieved due to the minimal adhesive layer thickness.

Es sind zahlreiche Klebstoffe verwendbar, die eine hohe Scher-, Ablöse-, Biege- und Stossfestigkeit sowie vorzugsweise gute Spaltfülleigenschaften aufweisen. Da der Klebstoff bei unbelastetem Fuss aushärten soll, muss er sehr schnell aushärten. Im Falle, dass das Bodenstück am Kappenstreifen hängt, muss der Klebstoff mit dem Material für den Kappenstreifen und das Bodenstück sowie mit dem Horn des Hufes verbindbar sein. Bevorzugte Klebstoffe sind anerobe Klebstoffe, beispielsweise aus der Familie der Zya-noacrylate sowie Arylklebstoffe mit einem Amininitiator und gegebenenfalls einem Beschleuniger für ein schnelles Aushärten. Numerous adhesives can be used which have high shear, peeling, bending and impact resistance and preferably good gap filling properties. Since the adhesive should harden when the foot is unloaded, it has to harden very quickly. In the event that the base piece hangs on the cap strip, the adhesive must be able to be bonded to the material for the cap strip and the base piece and to the horn of the hoof. Preferred adhesives are anerobic adhesives, for example from the cyanoacrylate family, and aryl adhesives with an amine initiator and, if appropriate, an accelerator for rapid curing.

Zur Unterstützung der Haftung des Kappenstreifens 16 am Hornschuh 11 während der Aushärtung oder Trocknung des Klebstoffes wird ein Band 23 an den Hinterenden des Kappenstreifens angebracht. In diesem Bereich hat der Kappenstreifen einen Schlitz 24, durch den die Enden nach vorne und aussen durchgesteckt werden. Ein Ende des Bandes 23 besitzt zwei Fortsätze 25, um zu verhindern, dass dieses Ende durch den einen Schlitz 24 gezogen wird. Das andere Ende weist eine Vielzahl von vorstehenden Zähnen 26 auf, die zwar leicht durch den Schlitz 24 schiebbar sind, einem Lösen aus dem Schlitz jedoch Widerstand leisten. Zweckmässigerweise besteht das Band 23 aus einem ähnlichen Material wie der Kappenstreifen und ist vorzugsweise zumindest etwas elastisch, so dass es nach dem Einstellen der richtigen Länge durch Eingreifen des gezahnten Endes in den Schlitz 24 gemäss Fig. 1 über den Ballen des Hufes gedrückt werden kann. Nachdem der Klebstoff ausgehärtet ist, kann das Band durch Abtrennen des hinteren Teils des Kappenstreifens entfernt werden. Hierzu sind im Flansch 18 des Kappenstreifens Perforationen 27 vorgesehen. To support the adhesion of the cap strip 16 to the horn shoe 11 during the curing or drying of the adhesive, a tape 23 is attached to the rear ends of the cap strip. In this area, the cap strip has a slot 24 through which the ends are pushed forward and outward. One end of the band 23 has two extensions 25 to prevent this end from being pulled through the one slot 24. The other end has a plurality of protruding teeth 26, which are easily slidable through the slot 24, but resist loosening from the slot. The band 23 expediently consists of a similar material to the cap strip and is preferably at least somewhat elastic, so that after the correct length has been set, it can be pressed over the ball of the hoof by engaging the toothed end in the slot 24 according to FIG. 1. After the adhesive has cured, the tape can be removed by severing the back of the cap strip. For this purpose, perforations 27 are provided in the flange 18 of the cap strip.

Zur Unterstützung der Bindung des Kappenstreifens an den Hornschuh 11 ist die Innenfläche des Flansches 18 vorzugsweise aufgerauht oder auf andere Weise für den verwendeten Klebstoff angriffsbereit gemacht. In einer Ausführung gemäss Fig. 6 ist eine Kunststoffauskleidung 28 mit dem Flansch 18 verbunden, die beispielsweise zur Gewährleistung einer guten Bindung aus dem gleichen Material wie der Kappenstreifen besteht. Die offenporige Zellstruktur der Auskleidung 28 bildet eine gegenüber dem glatten, spritzgeformten Kappenstreifen verhältnismässig rauhe Fläche, an der der Klebstoff gut anzugreifen vermag, um den Widerstand gegen ein Aufbrechen der Klebeverbindung zu erhöhen. Als Auskleidung ist ein geschäumtes oder geblasenes Polyurethanelastomer geeignet, das zu einer Plattendicke von etwa 1 mm gewalzt und anschliessend über die zum Formen des Kappenstreifens verwendete Form gestreckt wird. Beim Formen des Kappenstreifens entsteht dabei eine enge Bindung zwischen Auskleidung und Flansch 18. To support the binding of the cap strip to the horn shoe 11, the inner surface of the flange 18 is preferably roughened or otherwise made ready for attack by the adhesive used. In an embodiment according to FIG. 6, a plastic lining 28 is connected to the flange 18, which, for example, is made of the same material as the cap strip to ensure a good bond. The open-pore cell structure of the lining 28 forms a surface which is relatively rough compared to the smooth, injection-molded cap strip and on which the adhesive can attack well in order to increase the resistance to breaking the adhesive connection. A foamed or blown polyurethane elastomer is suitable as the lining, which is rolled to a plate thickness of about 1 mm and then stretched over the shape used to form the cap strip. When the cap strip is formed, a tight bond is created between the lining and the flange 18.

Nachdem der Kappenstreifen am Huf befestigt ist, wird das Bodenstück mit dem Kappenstreifen verbunden, beispielsweise durch Hitzeschweissen. Dies lässt sich dadurch erreichen, dass eine heisse Klinge oder eine mit einem elektrischen Heizelement versehene Klinge an die einander gegenüberliegenden, zu verbindenden Bereiche von Kappenstreifen und Bodenfläche gedrückt wird. Wenn der dadurch erwärmte Kunststoff die richtige Temperatur erreicht hat, After the cap strip is attached to the hoof, the bottom piece is connected to the cap strip, for example by heat welding. This can be achieved in that a hot blade or a blade provided with an electrical heating element is pressed against the mutually opposite regions of the cap strip and base surface to be connected. When the plastic that has been heated up has reached the correct temperature,

wird die Klinge abgezogen und das Bodenstück zur Herstellung einer Verbindung an den Kappenstreifen gepresst. In einer anderen Ausführung ist ein elektrischer Heizdraht in das Bodenstück 15 eingebettet und es wird Strom dann hindurchgeleitet, wenn das Pferd mit dem bereits befestigten Kappenstreifen wieder auftritt. the blade is pulled off and the base piece is pressed against the cap strip to establish a connection. In another embodiment, an electrical heating wire is embedded in the base piece 15 and current is passed through when the horse reappears with the cap strip already attached.

Eine Lagefixierung des hinteren Endes des Bodenstücks wird durch zwei Rippen 29 erreicht, die von einem sich zwischen den hinteren Enden 31 der Bodenfläche erstreckenden Steg 30 nach oben vorstehen. Die Rippen greifen in die The rear end of the base piece is fixed in position by two ribs 29 which project upwards from a web 30 which extends between the rear ends 31 of the base surface. The ribs engage in the

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Strahlfurchen des Pferdehufes, und zwar zu beiden Seiten des Strahls. Der Steg 30 verbindet die beiden Enden 31 fest miteinander und durch das Eingreifen der Rippen 29 in die Strahlfurchen wird ein seitliches Verschieben des Bodenstük-kes verhindert. In der dargestellten Ausführung sind die Rippen gegabelt, um sich beim engen Einpassen in die Strahlfurchen zusammendrücken zu lassen. Furrows of the horse's hoof on either side of the beam. The web 30 firmly connects the two ends 31 to one another and the engagement of the ribs 29 in the beam furrows prevents the base piece from being moved laterally. In the embodiment shown, the ribs are bifurcated so that they can be compressed when they fit snugly into the beam furrows.

Die Vorder- und Hinterhufe eines Pferdes haben üblicherweise unterschiedliche Formen, wobei ausserdem eine wesentliche Variation in ihren Grössen und Formen auftreten kann. Das Bodenstück 15 und der Kappenstreifen 16 werden daher in zwei verschiedenen Formen hergestellt, nämlich einer für Vorderhufe und einer für Hinterhufe. Jede Form ist in verschiedenen Grössen lieferbar, um eine Anpassung an eine grosse Anzahl unterschiedlicher Pferdehufe zu ermöglichen. Der Kappenstreifen ist wie zuvor erwähnt verformbar, um dicht an der Hornschuhwand und am Tragrand anzuliegen. Obgleich sich das Bodenstück nicht leicht verformen lässt, da es ja wenig flexibel ist, lässt es sich vor oder nach dem Verbinden mit dem Kappenstreifen trimmen. Durch die Verwendung eines verhältnismässig elastischen Kappenstreifens wird beim Anlegen um einen Huf eine auf den Kappenstreifen wirkende Belastung vermieden und gleichzeitig eine gute Basis für das Anbringen des verhältnismässig harten Bodenstücks geschaffen. The front and hind hooves of a horse usually have different shapes, although there may also be a significant variation in their sizes and shapes. The bottom piece 15 and the cap strip 16 are therefore manufactured in two different shapes, namely one for front hooves and one for rear hooves. Each shape is available in different sizes to allow adaptation to a large number of different horse hooves. As previously mentioned, the cap strip is deformable in order to fit tightly against the horn shoe wall and on the carrying edge. Although the base piece cannot be easily deformed, since it is not very flexible, it can be trimmed with the cap strip before or after connection. By using a relatively elastic cap strip, a load acting on the cap strip is avoided when putting on a hoof, and at the same time a good basis is provided for attaching the relatively hard base piece.

Zum Auswechseln des Kunststoff-Hufbeschlags wird der alte Beschlag mit einem scharfen Messer oder mit den üblichen Hufbeschneidewerkzeugen entfernt. Nach dem Beschneiden des Hornschuhs lässt sich der an der Hufseitenwand verbleibende Teil des Kappenstreifens mit einer Raspel entfernen. Dies ermöglicht gleichzeitig eine Reinigung der Hufseitenwand für ein gutes Haften des Klebstoffes. Hierzu können aber auch chemische Reinigungsmittel verwendet werden. Hierauf wird der ausgewählte Kappenstreifen mit zugehörigem Bodenstück und an der Innenseite des Kappenstreifenflansches 18 aufgebrachter Klebeschicht auf die Zehe und die Trachten des Hornschuhs sowie an den Tragrand der Sohle gepresst. Die Länge des Bandes 23 wird durch richtiges Einlegen der Zähne 26 eingestellt, worauf anschliessend das Band 23 gemäss Fig. 1 über den Ballen geschoben wird. Danach wird eine ein elektrisches Heizelement enthaltende Klinge zwischen die übereinander liegenden Bereiche s des Bodenstückes und des Kappenstreifens an einer Seite des verschweissten Zehenbereiches eingesteckt. Der Strom wird eingeschaltet und die beiden Teile werden aneinanderge-presst. Hat der Kunststoff eine zum Verschmelzen ausreichende Temperatur erreicht, dann wird die Klinge herausge-lo zogen und der Vorgang auf der anderen Seite des vorverbundenen Zehenbereiches wiederholt. Aus den Öffnungen 22 austretender überschüssiger Klebstoff wird abgewischt; nach dem Aushärten des Klebstoffes werden die Hinterenden des Kappenstreifens 16 mit dem Band 23 abgeschnitten. 15 Die Fig. 8 und 9 zeigen eine andere Ausführung des Bodenstückes, das aus einem Material ähnlicher Qualität wie der Kappenstreifen gespritzt ist. Dieses Bodenstück 30 ist jedoch durch einen verhältnismässig harten Einsatz 41, der in das Bodenstück eingebettet ist, in bezug auf den Kappen-20 streifen 16 verhältnismässig umbiegsam. Ein derartiger Einsatz 41 besteht aus dem gleichen Material wie das Bodenstück und der Kappenstreifen, hat jedoch eine Shore'A'-Härte von mindestens 100. In einer anderen Ausführung besteht der Einsatz aus Polycarbonat, wobei dann zur Gewähr-25 leistung einer guten mechanischen Verbindung zwischen dem-Einsatz und dem spitzgeformten Kappenstreifen Vorsprünge vom Einsatz vorstehen, um die das Material des Kappenstreifens geformt wird. To replace the plastic horseshoe, the old horseshoe is removed with a sharp knife or with the usual hoof trimming tools. After trimming the horn shoe, the part of the toe strip remaining on the side of the hoof can be removed with a rasp. At the same time, this enables the hoof sidewall to be cleaned so that the adhesive sticks well. Chemical cleaning agents can also be used for this. The selected cap strip with the associated base piece and adhesive layer applied to the inside of the cap strip flange 18 are then pressed onto the toe and the heel of the horn shoe and against the supporting edge of the sole. The length of the band 23 is set by properly inserting the teeth 26, whereupon the band 23 is then pushed over the bale according to FIG. A blade containing an electrical heating element is then inserted between the areas s of the base piece and the cap strip lying on top of one another on one side of the welded toe area. The power is turned on and the two parts are pressed together. When the plastic has reached a temperature sufficient to fuse, the blade is pulled out and the process is repeated on the other side of the pre-connected toe area. Excess adhesive emerging from the openings 22 is wiped off; after the adhesive has hardened, the rear ends of the cap strip 16 are cut off with the tape 23. 15 Figs. 8 and 9 show another embodiment of the base piece, which is injection molded from a material of a similar quality to the cap strip. This bottom piece 30 is relatively flexible due to a relatively hard insert 41, which is embedded in the bottom piece, with respect to the cap strip 20. An insert 41 of this type is made of the same material as the base piece and the cap strip, but has a Shore'A 'hardness of at least 100. In another embodiment, the insert is made of polycarbonate, which then ensures a good mechanical connection between the insert and the tipped cap strip, protrusions protrude from the insert about which the material of the cap strip is molded.

Die Fig. 10 und 11 zeigen eine weitere Ausführung des 30 Bodenstückes 15, wobei an den Steg 30 ein nach vorne gerichteter dreieckiger Fortsatz 45 ansetzt. Dieser Fortsatz greift in den Strahl des Hufes und gestattet somit eine bessere Ausrichtung des Hufeisens. Im Bereich des Fortsatzes 45 ist das Hufeisen gemäss Fig. 11 dicker, wodurch etwas Ge-35 wicht des Pferdes auf den Strahl übertragen und nicht nur vom Tragrand des Hufeisens aufgenommen wird. Dies nimmt ein Teil der auf die Klebeverbindung zwischen der Hufwand und dem Kappenstreifen wirkenden Kräfte weg. 10 and 11 show a further embodiment of the bottom piece 15, a triangular extension 45 directed towards the front being attached to the web 30. This extension engages in the hoof beam and thus allows better alignment of the horseshoe. In the area of the extension 45, the horseshoe according to FIG. 11 is thicker, as a result of which some weight of the horse is transferred to the beam and is not only absorbed by the carrying edge of the horseshoe. This takes away part of the forces acting on the adhesive connection between the hoof wall and the toe strip.

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Claims

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1. Hoof shoeing made of plastic with a cap strip of substantially L-shaped cross section, which is adapted to the shape of the lower region of the hoof side wall and the supporting edge of the sole of a hoof and is intended to run around the toes and side walls, and with a bottom piece of essentially the same outline as the cap strip, characterized in that the cap strip (16) is flexible and the base piece (15) is not very flexible in comparison, and that the toe regions of the cap strip (16) and the base piece (15) are pre-connected to one another.

2. Hoof padding according to claim 1, characterized in that the toe region pre-connected to the base piece (15) does not extend over more than 75 mm of the outer supporting edge of the base surface (15) and cap strip (16).

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tips of the nails protruding from the hoof are pinched off. The rest are handled.

The method explained above has obviously proven to be very satisfactory since it has been used for a very long time. However, it has drawbacks that can lead to horse lame. If, for example, a nail penetrates the sensitive part of the hoof or if a horse loses a horseshoe so that nails protrude from the lower part of the hoof, the horse can be injured. Furthermore, brittle horn horses sometimes cannot be shod because the nails would split the horn. Difficulties can also arise when horses are shod whose horn shoes grow slowly, which means that old nail holes can split the horn.

To avoid these difficulties, preformed plastic hoof fittings are known, which can be attached to the hoof either by nailing or gluing. These fittings are adapted to the shape of the hoof, so that no experience and expertise as necessary when fitting with metal iron is required. The known plastic horseshoes are also lighter than metal fittings, which is particularly advantageous in racing. A disadvantage of the plastic fittings, however, is that they have the same disadvantages as metal fittings in the case of fastening with nails, while the fastening does not withstand the heavy stress that normally occurs. So far, plastic fittings have not yet become established.

There are also two-part plastic hoof fittings from British patent application 1517113, in which a relatively flexible cap strip is adapted for attachment to a hoof, while a somewhat stiffer base piece is subsequently connected to the cap strip. Experiments with such horseshoes have proven extremely promising. However, these plastic hoof fittings are not as easy to put on as expected, and the lifespan of such fittings is temporarily shorter than for metal fittings. It is believed that this is due to relative movements between the shoeing and the hoof that occur during the curing of the adhesive bond and weaken it. Furthermore, since the toe area is most heavily loaded, there is a tendency for the horseshoe to detach from the toe.

In contrast, it is an object of the invention to provide an improved horseshoe made of plastic which does not have the disadvantages mentioned above.

To solve this problem, a horseshoe with the features specified in the characterizing part of claim 1 is used.

When shoeing, the cap strip of the shoeing covering the side wall or heels of the hoof is fastened to the side wall; a relatively flexible cap strip can be easily adapted to any hoof shape, which ensures a good adhesive bond between the cap strip and the hoof. Due to the flexibility of the stripe, adjustments to different hoof sizes can be achieved with just a few shapes and sizes of the preformed toe stripes. Despite this deformation, the base part of the horseshoe remains essentially flat, and the base part, which is relatively inflexible compared to the cap strip, can be connected to the cap strip in such a way that this connection has a high strength. This connection is made, for example, with the aid of adhesive that can be activated either by chemicals or by heat. Such a bond gives a much stronger one

Strength as a one-piece and relatively inflexible horseshoe that is locally deformed to fit a hoof and attached directly to it. Although these advantages also occur with the known horseshoe, the connection according to the invention of the base piece and the cap strip in the area of the toe increases the resistance to separation of these two parts considerably, which leads to a longer service life. In addition, the base piece is pre-aligned and secured against displacement when connected to the cap strip, which makes it much easier to adapt the base piece to the cap strip and produces a better connection.

The connection in the toe area does not extend so far that the flexibility of the cap strip is prevented. Practical tests for a typical toe strip showed that the connected toe area should not extend over more than 75 mm, preferably 50 mm of the outer hoof circumference and over about 25 mm on the inside of the toe strip. To ensure sufficient flexibility despite the pre-connection to the base piece, the sole region of the cap strip preferably has a section of reduced wall thickness at or near the two ends of the toe connection region. Each of these sections preferably has the shape of a groove which extends across the sole region of the cap strip and faces the base piece. To further increase the flexibility of the cap strip, two further such sections are provided in one embodiment, which are spaced from the ends of the toe connection area.

The part of the cap strip that covers the hoof wall and is attached to it should be as flexible as the strength requirements allow, and the wall thickness should be reduced at various points along the length of the cap strip. Advantageously, the outer surface of this section has molded grooves which have a rounded cross section and which run along the strip in a zigzag shape. The flexibility can also be increased by holes provided in the strip.

The attachment of the preformed cap strip to a hoof can be improved by ensuring that the strip does not move during the curing of the adhesive. For this purpose, a band is provided which runs around the ball of a hoof and is releasably attached to the toe strip. Preferably, the band is flexible, so that it can be placed over the bale under tension with the correct length setting.

Because of the high loads that affect the shoe when walking or standing, the adhesive used to attach the toe to the hoof must be carefully selected and result in a very high resistance to shearing and peeling. In addition, the adhesive should have good bending and impact properties and advantageously fill horn gaps well. For example, anaerobic adhesives are suitable for this purpose, for example cyanoacrylate adhesives or acrylic adhesives with an amine initiator and optionally an accelerator.

In order to give the adhesive a better contact surface for the adhesive, preferably at least the inner surface of the strip part that covers the hoof walls is designed as a rough surface. This is achieved, for example, by lining with a fibrous material which is molded onto the inner surface of the strip during its manufacture. Such a fibrous material is, for example, a loose cotton fiber or a similar fiber made of synthetic yarn. The roughening of the inner surface of the strip is shown in

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3. Hoof pad according to claim 2, characterized in that the pre-connected toe area does not extend over more than 25 mm of the inner supporting edge of the bottom surface (15) and cap strip (16).

4. Hoof pad according to one of claims 1 to 3, characterized in that the sole region (20) of the toe strip (16) has a part of reduced wall thickness which is at or near the ends of the pre-connected toe region.

5. A horseshoe according to claim 4, characterized in that each area of reduced wall thickness has the shape of a groove (21) which extends across the sole area (20) of the cap strip (16) and faces the bottom piece (15).

6. Hoof pad according to one of claims 1 to 5, characterized in that the flange (18) of the cap strip (16) to be located over the hoof side wall is reduced in wall thickness at various points.

7. horseshoe according to claim 6, characterized in that in the outer surface of the flange (18) grooves (19) are provided which extend in a zigzag shape over the length of the cap strip (16).

8. Hoof pad according to one of claims 1 to 7, characterized in that a band (23) is provided which can be placed around the ball (14) of a hoof and can be fastened adjustably to the toe strip (16).

9. horseshoe according to claim 8, characterized in that the band (23) is flexible, so that it can be placed under tension over the ball (14) when its length is set correctly.

10. Hoof pad according to one of claims 1 to 9, characterized in that at least the inner surface of the flange (18) of the cap strip (16) lying above the side walls of the hoof has a rough structure.

11. Hoof pad according to claim 10, characterized in that the rough structure is formed by a fiber lining which is fixedly connected to the inner surface of the cap strip (16).

12. A horseshoe according to claim 11, characterized in that the fiber lining is a loose cotton fiber.

13. Hoof pad according to claim 10, characterized in that the rough structure is formed by a foamed plastic (28) which sits on the inner surface of the cap strip (16).

14. Hoof pad according to one of claims 1 to 13, characterized in that the cap strip (16) is made of a polyurethane elastomer with a Shore'A 'hardness of 83 to 87.

15. horseshoe according to one of claims 1 to 14, characterized in that the base piece (15) from one

Polyurethane elastomers with a Shore'A 'hardness of 90 to 95 is made.

16. A horseshoe according to one of claims 1 to 14, characterized in that the base piece (40) is essentially made of the same plastic as the cap strip (16), the base piece (40) being made by a relatively hard, in the plastic base surface embedded insert (41) is given sufficient rigidity.

17. Hoof pad according to claim 16, characterized in that the insert (41) consists of relatively hard plastic.

18. Hoof pad according to one of claims 1 to 17, characterized in that in the transition region of the two i5 - the L-shape forming - wall sections of the cap strip (16) openings (22) are provided through which fluid can escape when worn.

19. Hoof pad according to one of claims 1 to 18, characterized in that an electrical heating element ent-

20 is neither embedded in the base piece (15) or in the cap strip (16), so that these parts can be fused together by pressing on and introducing electrical current.

20. Hoof pad according to one of claims 1 to 19, characterized in that a web (30) extends between the ends of the bottom surface and has two upstanding ribs (29) which can be inserted into the beam grooves of the hoof on both sides of the beam. wearing.

21. Hoof pad according to claim 20, characterized in that the web (30) has a forward-facing,

pointed tapered projection (45) which engages in the beam of a hoof when the shoeing is applied.

22. A method for shoeing a horse's hoof with a plastic horseshoe according to one of claims 1

35 to 21, characterized in that a suitable pre-connected and pre-shaped cap strip and base piece (15, 16) combination is selected, that the pre-shaped cap strip (16) is fastened to the heels of the hoof and on the toe and then with the it connects underlying, not pre-connected areas of the base piece (15).

23. The method according to claim 22, characterized in that the connection between the base piece (15) and cap strip (16) is effected by hot melting.

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The invention relates to a plastic horseshoe according to the preamble of claim 1 and a method for shoeing horse's hooves with such a shoeing.

55 The term "plastic" in connection with the horseshoe means synthetic and natural polymers and monomers, such as rubber or cellulose compounds and synthetic synthetic resins.

Horseshoes have been shod on 6o horse hooves for several hundred years, and little has changed in spite of numerous technological developments. Usually, the shoeing area of the hoof, i.e. the horn shoe, is trimmed to the desired length for shoeing a horse's hoof, after which an iron suitable for the trimmed hoof is forged. After cooling, the iron is attached to the hoof with the help of nails, the nails reaching through holes in the iron and being struck through the hoof wall. From

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Another embodiment achieved in that the inside carries a foamed or "blown" plastic, for example a lining with open-pore polyurethane foam. Such a lining can be stretched over the core of a mold during the production of the strip before the plastic is injected, a narrow embedding or connection to the strip then taking place when the plastic is injected.

A preferred material for the cap strip is a polyurethane elastomer, which expediently has a Shore'A 'hardness of 83 to 87, although other plastics and other spring properties or hardnesses and thus degrees of flexibility can also be used, as long as the cap strip is relatively flexible with respect to the base piece is. The latter must be relatively inflexible and also sufficiently firmly connected to the cap strip. Polyurethane elastomer is again preferably used as the plastic, but with a Shore'A 'hardness of 90 to 95. However, other substances can also be used. In a preferred embodiment, the bottom piece and the cap strip are made essentially of polyurethane elastomer of the same quality; however, the rigidity is imparted to the running part by an embedded, relatively hard use. This insert in turn consists, for example, of a polyurethane elastomer of greater hardness than the other parts of the base piece in order to achieve the desired different flexibility.

The two parts of the horseshoe, namely the toe strip and the base piece, can be manufactured separately and can then be connected in the toe area, for example by chemical welding or gluing, but preferably by heat welding or fusion. In another embodiment, the two parts are produced in a molding machine in such a way that they are fused together in the toe area right from the start, in one embodiment two mold cavities are provided with an opening in between in the toe area. The injected plastic then melts during the molding process.

Tests have shown that the sole area of the toe strip cannot be connected sufficiently firmly to the hoof, so that the toe strip is mainly connected to the hoof side walls. As a result, water, dirt and mud can settle between the sole of the hoof and the cap strip, which leads to a hydraulic pumping action when the horse is running, which can result in the cap strip becoming detached from the heels and toe. In a particularly preferred embodiment, openings are therefore provided in the cap strip, specifically in the transition area to the base piece. Liquid and semi-liquid substances can escape through these openings when running, which reduces the hydraulic pressure that would otherwise arise. The openings also allow excess glue to flow away while sticking to the horn shoe.

In a preferred embodiment, the base piece and the cap strip are connected to one another by heat welding. For this purpose, a heated blade is expediently inserted between the opposing support regions of the two parts, the two parts are pressed together, and the blade is pulled off in the points to be connected after reaching a sufficiently high temperature. In another embodiment, an electric heating element, e.g. B. a heating wire embedded in the plastic, preferably in the bottom piece,

- embedding in the strips is also possible,

- And the two parts are fused together by pressing and introducing electricity into the heating element. Instead of such hot-melt processes, chemical binders or adhesives can also be used, which are selected according to the substances used for the two parts.

To fix the position of the rear end of the base piece and to prevent lateral movements of the base piece, a web extends between the ends thereof, which has two upstanding ribs which engage in the beam grooves of a hoof on both sides of the beam. Since the bridge is essentially rigid, the two ends of the base piece are connected to one another, and only when both ends detach from the toe strip can the horseshoe fall off. Furthermore, the ribs inserted into the V-shaped furrows of the hoof on each side of the beam prevent lateral displacement of the web and thus of the shoe ends. The ribs are preferably formed so as to be approximately adapted to the shape of the beam furrows.

In addition, a positional fixation can be achieved by means of a tapered projection which is directed forwardly from the bridge if the projection engages in the beam when the horseshoe is put on. The projection should generally have the shape of the beam; it is therefore essentially triangular. In another embodiment, in which the projection should rest against the jet when running, the material of the base piece is thickened in the region of the projection.