EP0545855B1 - Apparatus for accelerating projectiles from a dummy shuttle loom - Google Patents

Apparatus for accelerating projectiles from a dummy shuttle loom Download PDF

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Publication number
EP0545855B1
EP0545855B1 EP92810842A EP92810842A EP0545855B1 EP 0545855 B1 EP0545855 B1 EP 0545855B1 EP 92810842 A EP92810842 A EP 92810842A EP 92810842 A EP92810842 A EP 92810842A EP 0545855 B1 EP0545855 B1 EP 0545855B1
Authority
EP
European Patent Office
Prior art keywords
striker
piece
projectile
face
striking
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 - Lifetime
Application number
EP92810842A
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German (de)
French (fr)
Other versions
EP0545855A1 (en
Inventor
Danilo Vezzu
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.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti 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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Publication of EP0545855A1 publication Critical patent/EP0545855A1/en
Application granted granted Critical
Publication of EP0545855B1 publication Critical patent/EP0545855B1/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/24—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by gripper or dummy shuttle

Definitions

  • the invention relates to a device for accelerating the projectile of a projectile loom according to the preamble of claim 1. It also relates to a projectile loom with the device according to the invention.
  • the invention has for its object to provide a device for accelerating the projectile of weaving machines, in which the wear on the butt surface of the projectile and on the face of the striking piece is reduced.
  • the object is achieved in that an active or passive alignment element acts on the position of the striking piece in such a way that a striking face of the striking piece is adapted to the butting surface of the projectile during the triggering of the shot.
  • the device for accelerating the projectile of a projectile weaving machine has a torsion bar launching device with a striking lever, which has an impact piece at its end facing away from the torsion bar, which acts directly on the impact surface of the projectile during firing.
  • the projectile for the weaving machine which has a housing formed by a hollow body, can be partially closed at the rear when viewed in the flight direction.
  • the striking piece which is rotatably arranged on the striking lever, has at least one striking surface which is aligned by means of an alignment element such that the striking surface is adapted to the impact surface of the projectile at the latest immediately before, during or after the firing of the shot, for example as two parallel or approximately parallel ones Surfaces.
  • the impact energy is distributed evenly over the impact surface to the projectile, which has an advantageous effect on the wear of the impact surface and the impact surface.
  • Another advantage is that the projectile can be inserted into the launching device with a small distance between the striking surface and the striking surface due to the defined position of the striking surface, which reduces the impact on the striking surface.
  • Another advantage is that the striking piece does not come into contact with the alignment element during the acceleration phase of the projectile.
  • Fig. 1 shows the projectile acceleration device 1 of the projectile loom, not shown.
  • a striking lever 3 is rotatably connected at one end.
  • the other end of the striking lever 3 has a rotatable striking piece 34, the striking surface 33 of which is adapted to the butt surface 43 of the projectile 4 at the latest immediately before the shot is triggered.
  • the projectile 4, which is guided several times in the firing direction, shoots through the shed in a channel 10 formed by guide teeth 11 and in this way carries the weft thread 14.
  • the guide teeth are attached to the sley 13.
  • the torsion bar 2 is clamped firmly at its other end, not shown here, and is twisted and clamped at its other end.
  • the flipped lever 3 ' is partially shown in dashed lines in Fig. 1.
  • the projectiles 4 are brought in succession with the pivotable projectile lifter 7 from the position 7 ′ shown in broken lines with the projectile 4 ′ into the firing position, that is, they are presented to the striking piece 34 of the striking lever 3.
  • the projectiles 4 ' are transported back to the projectile lifter 7', for example using a transport chain, not shown here.
  • the firing of a projectile 4 and the rotary movement of the striking lever 3 on the torsion bar 2 are illustrated with the view of FIG. 2. With 3 'and 3' 'two further positions and with 3 ′′′ the reverse position of the striking lever are shown in broken lines.
  • the launch phase is practically complete after the rotation of the striking lever 3 by the angle ⁇ , while the striking lever 3 continues to rotate by the angle ⁇ up to the reversing position 3 ′′′. While the striking lever is tensioned, it moves back into its starting position 3, an alignment element 5 influencing the position of the striking piece 34 between the starting position 3 and at least part of the angular range ⁇ .
  • the striking piece 34 of the striking lever 3 is rotatably mounted with a bush 35 'which is pressed onto a bolt 35 and has one in the firing direction T-shaped, flat face 33 on.
  • the striking surface 33 is perpendicular to the firing direction in the firing position. Firing positions of the striking surface 33 that deviate from the vertical can also be used, the striking surface 43 of the projectile being in each case parallel or approximately parallel to the striking surface 33.
  • the alignment element acts on at least one surface of the striking piece 34.
  • surface 37 is suitable for contacting alignment element 5 as a guide surface.
  • the stop surface 36 limits, as shown in FIG. 3b, the inclination play ⁇ of the striking piece 34.
  • FIG. 3c shows a view of the striking lever 3 with striking piece 34 in the firing direction.
  • An embodiment of a striking piece 34 with striking surface 33 and guide surface 37 is shown in FIG. 3d.
  • the striker 34 is preferably designed such that it is balanced with respect to its rotation about the bush 35 '.
  • FIG. 4a and 4b show, as a further exemplary embodiment, a U-shaped striking piece 34 which is otherwise identical in function to the striking piece according to FIG. 3a.
  • the wide guide surface 37 brings about a reduction in the surface pressure of the contact surface with the alignment element 5.
  • a T-shaped widening of those regions of the guide surface 37 which come into contact with the alignment element 5 can also be advantageous in the exemplary embodiment according to FIG. 3d.
  • the striker 34 is a rotatable polygon, e.g. designed as a hexagon, the various polygonal areas e.g. can serve successively as striking surface 33 or as guiding surface 37.
  • FIG. 6a shows the striking lever 3 with the associated striking piece 34 and the projectile 4 in the firing position.
  • the position of the striking surface 33 of the striking piece 34 is fixed by the alignment element 50 parallel or approximately parallel to the striking surface 43 of the projectile 4.
  • the defined position of the striking surface 33 allows the projectile 4 to be inserted into the firing position by means of the projectile lifter 7 such that the distance between the striking surface 43 and the striking surface 33 is usually fractions of a millimeter.
  • the striking surface 33 strikes the impact surface 43 at an ideally negligible speed and with a negligible angle between the striking surface 33 and the impact surface 43 and accelerates the projectile 4 increasingly while maintaining mutual contact.
  • the guide beam 8 forces the projectile 4 'to move linearly in the firing direction, whereas the striker 34' describes a circular path, which is why the striking surface 33 slides vertically to the firing direction over the striking surface 43.
  • FIG. 6b shows the striking lever 3 with the associated striking piece 34 after completion of the tensioning process and various possible positions of the striking piece 34 34, 34 ′′ and 34 ′ during tensioning of the striking lever 3.
  • the striking piece 34 has an inclination play ⁇ , so that the illustrated Positions 34 ', 34' 'and 34 ′′′ of the striking piece have been selected to illustrate the effect of the guide surface 51, but the positions are only a special case of many possible positions, depending on the inclination play ⁇ .
  • the guide surface 51 of the guide element 5 limits the inclination play ⁇ of the striking piece 34 in the area ⁇ ′′′ in order to fix the striking piece 34 in a defined position without play in the following area ⁇ '' ''. It may prove advantageous to start narrowing the angle of inclination ⁇ already in the areas ⁇ 'and ⁇ ' '.
  • the impacts of the guide surface 37 on the guide surface 51 during the tensioning of the striking lever 3 can be reduced or even eliminated if the impact angle of the two surfaces is as flat as possible.
  • the course of the guide surface 37 of the striking piece 34 can, as shown in FIG. 3a, also be part of an inlet area ⁇ ', an alignment area ⁇ ' 'and a holding area ⁇ , in order to enable the two guide surfaces 37 and 51 to work together with little impact.
  • the angular velocity profile of the impact lever 3 can be influenced during the tensioning by appropriately shaped cam disks, so that, for example, the area of the first contact between the two guide surfaces 37 and 51 is traversed at a correspondingly low angular velocity.
  • the blows between the guide surfaces 37 and 51 can be further reduced by the alignment element 50 having spring properties, particularly perpendicular to the projectile firing track, for example due to the production of the alignment element 50 made of a soft material such as plastic or a mounting of the alignment element 50 on resilient elements.
  • FIG. 6c shows the striking lever 3 with the associated striking piece 34 after completion of the tensioning process and various positions of the striking piece 34 34, 34 ′′ and 34 ′ during tensioning of the striking lever 3.
  • the position of the striking piece 34 is missing fixing area ⁇ '' '', which is why the striker 34 in the starting position has little inclination play.
  • the position of the impact piece 34 relative to the projectile 4 during the acceleration phase of the projectile 4 is shown in FIG. 7.
  • the impact piece 34 moves relative to the projectile to the position of the maximum acceleration 340' 'in order to end the projectile acceleration in the position 340 ′′′.
  • the striking surface 33 slides vertically to the firing direction over the striking surface 43.
  • the center of gravity S of the striking piece 34 must lie within the striking surface 43 of the projectile 4 at least from the start of acceleration 340 ′ to the maximum acceleration 340 ′′ in the firing direction. Tilting of the striking piece 34 while lifting the flat contact should only take place towards the end of the projectile acceleration in the area of the position 340 ′′′.
  • FIG. 8 Another embodiment of an alignment element is shown in FIG. 8.
  • the alignment element 52 is designed in the manner of a spring, for example as a leaf spring which is clamped in a clamping element 53.
  • the clamping element 53 can also have resilient properties such that the alignment element 52 can be designed as a rigid body is.
  • the alignment element 52 with the clamping element 53 can of course also be a component of the alignment element 50, for example in that the alignment element 52 forms the holding region ⁇ ''''.
  • FIG. 9 Another embodiment of an alignment element is shown in FIG. 9.
  • the striking piece 34 ′ shown in dashed lines strikes the alignment element 54 at a preferably very low angular velocity.
  • the striking piece 34 is aligned by the further rotation of the striking lever 3 by the alignment element 54. Resilient properties of the alignment element 54 in the firing direction of the projectile 4 are advantageous.
  • the striking piece 34 can also be aligned by an active, motor-driven alignment element 55 which, for example in the starting position of the striking lever before the firing of the shot, influences the inclination of the striking piece by linear or rotating movement.
  • an active, motor-driven alignment element 55 which, for example in the starting position of the striking lever before the firing of the shot, influences the inclination of the striking piece by linear or rotating movement.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Toys (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Beschleunigung des Projektils einer Projektilwebmaschine gemäss dem Oberbegriff des Anspruchs 1. Sie betrifft weiter eine Projektilwebmaschine mit der erfindungsgemässen Vorrichtung.The invention relates to a device for accelerating the projectile of a projectile loom according to the preamble of claim 1. It also relates to a projectile loom with the device according to the invention.

Aus der US Patentanmeldung 4,922,967 ist ein Antrieb für die Projektile einer Projektilwebmaschine bekannt, der mit einem Schlagstück direkt auf das in einer geraden Führungsbahn geführte Projektil einwirkt. Das Schlagstück ist auf einem Schlaghebel an seinem vom Torsionsstab entfernten Ende befestigt und bewegt sich auf einer praktisch kreisförmigen Bahn. Der Schlaghebel ist über das Schlagstück mit der Hinterseite des Projektils, im Bereich der Stossfläche, in Kontakt und beschleunigt dieses in einigen wenigen Millisekunden auf einem Weg von wenigen Zentimetern mit einer Beschleunigung von bis zu 30'000 m/sec auf Geschwindigkeiten von bis zu 60 m/sec. Die Schlagfläche des Schlagstücks sowie die Stossfläche des Projektils sind daher einer hohen Beanspruchung ausgesetzt, was sich in einem entsprechenden Verschleiss niederschlägt.From the US patent application 4,922,967 a drive for the projectiles of a projectile weaving machine is known which acts directly with an impact piece on the projectile guided in a straight guideway. The striking piece is attached to a striking lever at its end remote from the torsion bar and moves on a practically circular path. The impact lever is in contact with the rear of the projectile in the area of the impact surface via the impact piece and accelerates it in a few milliseconds on a path of a few centimeters with an acceleration of up to 30,000 m / sec to speeds of up to 60 m / sec. The striking surface of the striking piece as well the impact surface of the projectile is therefore exposed to high stress, which is reflected in a corresponding wear.

Die Erfindung hat zur Aufgabe eine Vorrichtung zur Beschleunigung des Projektils von Webmaschinen zu schaffen, bei der sich der Verschleiss an der Stossfläche des Projektils sowie an der Schlagfläche des Schlagstücks reduziert. Erfindungsgemäss wird die Aufgabe dadurch gelösst, dass ein aktives oder passives Ausrichtelement derart auf die Stellung des Schlagstückes einwirkt, dass während der Schussauslösung eine Schlagfläche des Schlagstückes zur Stossfläche des Projektils angepasst liegt. Die abhängigen Ansprüche beziehen sich auf besonders vorteilhafte Ausbildungen der Erfindung.The invention has for its object to provide a device for accelerating the projectile of weaving machines, in which the wear on the butt surface of the projectile and on the face of the striking piece is reduced. According to the invention, the object is achieved in that an active or passive alignment element acts on the position of the striking piece in such a way that a striking face of the striking piece is adapted to the butting surface of the projectile during the triggering of the shot. The dependent claims relate to particularly advantageous embodiments of the invention.

Die Vorrichtung zur Beschleunigung des Projektils einer Projektilwebmaschine weist eine Torsionsstab-Abschussvorrichtung mit einem Schlaghebel auf, der an seinem vom Torsionsstab abgekehrten Ende ein Schlagstück aufweist, das beim Abschuss direkt auf die Stossfläche des Projektils einwirkt. Das Projektil für die Webmaschine, das ein von einem Hohlkörper gebildetes Gehäuse aufweist, kann in Flugrichtung betrachtet hinten teilweise geschlossen sein. Das auf dem Schlaghebel drehbar angeordnete Schlagstück weist mindestens eine Schlagfläche auf, die sich durch ein Ausrichtelement derart ausrichtet, dass spätestens unmittelbar vor, bei oder nach der Schussauslösung die Schlagfläche zur Stossfläche des Projektils angepasst liegt, so zum Beispiel als zwei parallel oder annähernd parallel liegende Flächen. Die Stossenergie überträgt sich gleichmässig über die Stossfläche verteilt auf das Projektil, was den Verschleiss von Schlagfläche und Stossfläche vorteilhaft beeinflusst.The device for accelerating the projectile of a projectile weaving machine has a torsion bar launching device with a striking lever, which has an impact piece at its end facing away from the torsion bar, which acts directly on the impact surface of the projectile during firing. The projectile for the weaving machine, which has a housing formed by a hollow body, can be partially closed at the rear when viewed in the flight direction. The striking piece, which is rotatably arranged on the striking lever, has at least one striking surface which is aligned by means of an alignment element such that the striking surface is adapted to the impact surface of the projectile at the latest immediately before, during or after the firing of the shot, for example as two parallel or approximately parallel ones Surfaces. The impact energy is distributed evenly over the impact surface to the projectile, which has an advantageous effect on the wear of the impact surface and the impact surface.

Weiter wirkt sich vorteilhaft aus, dass das Projektil aufgrund der definierten Lage der Schlagfläche mit einem geringen Abstand zwischen Schlagfläche und Stossfläche in die Abschussvorrichtung einlegbar ist, was den Schlag auf die Stossfläche reduziert.Another advantage is that the projectile can be inserted into the launching device with a small distance between the striking surface and the striking surface due to the defined position of the striking surface, which reduces the impact on the striking surface.

Ein weiterer Vorteil ist darin zu sehen, dass das Schlagstück während der Beschleunigungsphase des Projektils mit dem Ausrichtelement nicht in Berührung kommt.Another advantage is that the striking piece does not come into contact with the alignment element during the acceleration phase of the projectile.

Anhand der schematischen Zeichnungen, welche Beispiele der Erfindung und Einzelheiten davon zeigen, wird die Erfindung näher erläutert.The invention is explained in more detail with reference to the schematic drawings, which show examples of the invention and details thereof.

Es zeigt:

Fig. 1
schematisch, mit ausgezogenen Linien einen Teil der erfindungsgemässen Abschussvorrichtung einer Projektilwebmaschine vor und gestrichtelt nach dem Abschuss des Projektils;
Fig. 2
eine schematische Seitenansicht eines Schlaghebels mit Schlagstück und mit dem Projektil in verschiedenen Positionen während und nach dem Abschuss des Projektils;
Fig. 3a
ein Schlaghebel mit einem um einen bestimmten Winkel drehbaren, T-förmigen Schlagstück;
Fig. 3b
der Schlaghebel mit gedrehtem, T-förmigen Schlagstück;
Fig. 3c
eine Ansicht des Schlaghebels in Abschussrichtung;
Fig. 3d
eine Ansicht des T-förmigen Schlagstücks;
Fig. 4a
ein Schlaghebel mit einem U-förmigen Schlagstück;
Fig. 4b
ein Längsschnitt durch den Schlaghebel mit U-förmigem Schlagstück;
Fig. 5
eine weitere Form eines drehbaren Schlagstücks;
Fig. 6a
ein Ausrichtelement mit der gegenseitigen Lage von Schlagstück und Projektil unmittelbar vor und gestrichelt während der Schussabgabe;
Fig. 6b
die Wirkung des Ausrichtelementes auf die Stellung des Schlagstücks während dem Spannen des Schlaghebels;
Fig. 6c
die Wirkung eines Ausrichtelementes auf die Stellung des Schlagstücks während dem Spannen des Schlaghebels;
Fig. 7
die Lage des Schlagstücks relativ zum Projektil während der Beschleunigungsphase des Projektils;
Fig. 8
ein federartiges Ausrichtelement;
Fig. 9
ein weiteres Ausrichtelement;
Fig. 10
ein weiteres, aktiv bewegtes Ausrichtelement.
It shows:
Fig. 1
schematically, with solid lines, part of the launching device according to the invention of a projectile weaving machine before and dashed after the projectile has been fired;
Fig. 2
is a schematic side view of a striking lever with a striking piece and with the projectile in different positions during and after the projectile has been fired;
Fig. 3a
a striker with a T-shaped striker rotatable through a certain angle;
Fig. 3b
the striking lever with turned, T-shaped striking piece;
Fig. 3c
a view of the firing lever in the firing direction;
Fig. 3d
a view of the T-shaped striker;
Fig. 4a
a striking lever with a U-shaped striking piece;
Fig. 4b
a longitudinal section through the striking lever with a U-shaped striking piece;
Fig. 5
another form of a rotatable striker;
Fig. 6a
an alignment element with the mutual position of the impact piece and projectile immediately before and dashed during the firing of the shot;
Fig. 6b
the effect of the alignment element on the position of the striking piece during tensioning of the striking lever;
Fig. 6c
the effect of an alignment element on the position of the striking piece during tensioning of the striking lever;
Fig. 7
the position of the striking piece relative to the projectile during the acceleration phase of the projectile;
Fig. 8
a spring-like alignment element;
Fig. 9
another alignment element;
Fig. 10
another, actively moving alignment element.

Fig. 1 zeigt die Projektil-Beschleunigungsvorrichtung 1 der nicht gezeigten Projektilwebmaschine. Mit dem Torsionsstab 2 ist ein Schlaghebel 3 am einen Ende drehfest verbunden. Das andere Ende des Schlaghebels 3 weist ein drehbares Schlagstück 34 auf, dessen Schlagfläche 33 spätestens unmittelbar vor der Schussauslösung zur Stossfläche 43 des Projektils 4 angepasst liegt. Das in Abschussrichtung mehrfach geführte Projektil 4 schiesst nach dem Abschuss in einem durch Führungszähne 11 gebildeten Kanal 10 durch das Webfach und trägt derart den Schussfaden 14 ein. Die Führungszähne sind auf der Weblade 13 angebracht. Der Torsionsstab 2 ist an seinem anderen, hier nicht gezeigten Ende fest eingespannt und wird an seinem anderen Ende verdreht und gespannt. Der zurückgeschnellte Schlaghebel 3' ist in Fig. 1 teilweise gestrichelt dargestellt. Die Projektile 4 werden nacheinander mit dem schwenkbaren Projektilheber 7 von der gestrichelt dargestellten Position 7' mit Projektil 4' in die Abschussposition gebracht, d.h. dem Schlagstück 34 des Schlaghebels 3 vorgelegt. Bei bekannten Projektilwebmaschinen erfolgt der Rücktransport der Projektile 4' zum Projektilheber 7' beispielsweise mit einer hier nicht gezeigten Transportkette.Fig. 1 shows the projectile acceleration device 1 of the projectile loom, not shown. With the torsion bar 2, a striking lever 3 is rotatably connected at one end. The other end of the striking lever 3 has a rotatable striking piece 34, the striking surface 33 of which is adapted to the butt surface 43 of the projectile 4 at the latest immediately before the shot is triggered. The projectile 4, which is guided several times in the firing direction, shoots through the shed in a channel 10 formed by guide teeth 11 and in this way carries the weft thread 14. The guide teeth are attached to the sley 13. The torsion bar 2 is clamped firmly at its other end, not shown here, and is twisted and clamped at its other end. The flipped lever 3 'is partially shown in dashed lines in Fig. 1. The projectiles 4 are brought in succession with the pivotable projectile lifter 7 from the position 7 ′ shown in broken lines with the projectile 4 ′ into the firing position, that is, they are presented to the striking piece 34 of the striking lever 3. In known projectile weaving machines, the projectiles 4 'are transported back to the projectile lifter 7', for example using a transport chain, not shown here.

Der Abschuss eines Projektils 4 und die Drehbewegung des Schlaghebels 3 auf dem Torsionsstab 2 sind anhand der Ansicht von Fig. 2 veranschaulicht. Mit 3' und 3'' sind zwei weitere Positionen und mit 3‴ die Umkehrposition des Schlaghebels gestrichelt gezeichnet. Die Abschussphase ist nach der Drehung des Schlaghebels 3 um den Winkel α praktisch abgeschlossen, während der Schlaghebel 3 bis zur Umkehrposition 3‴ um den Winkel β weiterdreht. Während dem Spannen des Schlaghebels bewegt sich dieser wieder in seine Ausgangsposition 3 zurück, wobei zwischen der Ausgangsposition 3 und mindestens einem Teil des Winkelbereiches α ein Ausrichtelement 5 die Lage des Schlagstückes 34 beeinflusst.The firing of a projectile 4 and the rotary movement of the striking lever 3 on the torsion bar 2 are illustrated with the view of FIG. 2. With 3 'and 3' 'two further positions and with 3 ‴ the reverse position of the striking lever are shown in broken lines. The launch phase is practically complete after the rotation of the striking lever 3 by the angle α, while the striking lever 3 continues to rotate by the angle β up to the reversing position 3 ‴. While the striking lever is tensioned, it moves back into its starting position 3, an alignment element 5 influencing the position of the striking piece 34 between the starting position 3 and at least part of the angular range α.

In Fig. 3a ist das Schlagstück 34 des Schlaghebels 3 mit einer Buchse 35', die auf einem Bolzen 35 aufgepresst ist, drehbar gelagert und weist eine in Abschussrichtung T-förmig verbreiterte, plane Schlagfläche 33 auf. Im gezeigten Ausführungsbeispiel steht die Schlagfläche 33 in der Abschussstellung senkrecht zur Abschussrichtung. Auch von der Senkrechten abweichende Abschussstellungen der Schlagfläche 33 sind anwendbar, wobei die Stossfläche 43 des Projektils jeweils parallel oder annähernd parallel zur Schlagfläche 33 liegt. Das Ausrichtelement wirkt auf mindestens eine Fläche des Schlagstückes 34 ein. So eignet sich beispielsweise die Fläche 37 um als Leitfläche mit dem Ausrichtelement 5 in Kontakt zu treten. Die Anschlagfläche 36 begrenzt, wie in Fig. 3b dargestellt, das Neigungsspiel δ des Schlagstückes 34. Fig. 3c zeigt eine Ansicht des Schlaghebels 3 mit Schlagstück 34 in Abschussrichtung. Ein Ausführungsbeispiel eines Schlagstückes 34 mit Schlagfläche 33 und Leitfläche 37 ist in Fig. 3d dargestellt. Das Schlagstück 34 ist vorzugsweise derart gestaltet, dass es bezüglich seiner Drehung um die Buchse 35' ausgewuchtet ist.In Fig. 3a, the striking piece 34 of the striking lever 3 is rotatably mounted with a bush 35 'which is pressed onto a bolt 35 and has one in the firing direction T-shaped, flat face 33 on. In the exemplary embodiment shown, the striking surface 33 is perpendicular to the firing direction in the firing position. Firing positions of the striking surface 33 that deviate from the vertical can also be used, the striking surface 43 of the projectile being in each case parallel or approximately parallel to the striking surface 33. The alignment element acts on at least one surface of the striking piece 34. For example, surface 37 is suitable for contacting alignment element 5 as a guide surface. The stop surface 36 limits, as shown in FIG. 3b, the inclination play δ of the striking piece 34. FIG. 3c shows a view of the striking lever 3 with striking piece 34 in the firing direction. An embodiment of a striking piece 34 with striking surface 33 and guide surface 37 is shown in FIG. 3d. The striker 34 is preferably designed such that it is balanced with respect to its rotation about the bush 35 '.

Fig. 4a und Fig. 4b zeigt als weiteres Ausführungsbeispiel ein U-förmig ausgebildetes Schlagstück 34, das sonst bezüglich Funktion mit dem Schlagstück gemäss Fig. 3a identisch ist. Die breite Leitfläche 37 bewirkt eine Reduktion der Flächenpressung der berührenden Fläche mit dem Ausrichtelement 5. Eine T-förmige Verbreiterung derjenigen Bereiche der Leitfläche 37, die mit dem Ausrichtelement 5 in Berührung kommen, kann auch im Ausführungsbeispiel gemäss Fig. 3d vorteilhaft sein.4a and 4b show, as a further exemplary embodiment, a U-shaped striking piece 34 which is otherwise identical in function to the striking piece according to FIG. 3a. The wide guide surface 37 brings about a reduction in the surface pressure of the contact surface with the alignment element 5. A T-shaped widening of those regions of the guide surface 37 which come into contact with the alignment element 5 can also be advantageous in the exemplary embodiment according to FIG. 3d.

In Fig. 5 ist das Schlagstück 34 als drehbares Vieleck, z.B. als Sechseck, ausgeführt, wobei die verschiedenen Vielecksflächen z.B. aufeinanderfolgend als Schlagfläche 33 beziehungsweise als Leitfläche 37 dienen können.In Fig. 5 the striker 34 is a rotatable polygon, e.g. designed as a hexagon, the various polygonal areas e.g. can serve successively as striking surface 33 or as guiding surface 37.

Fig. 6a zeigt den Schlaghebel 3 mit dem zugehörigen Schlagstück 34 sowie das Projektil 4 in Abschussstellung. Die Lage der Schlagfläche 33 des Schlagstücks 34 ist durch das Ausrichtelement 50 parallel oder annähernd parallel zur Stossfläche 43 des Projektils 4 fixiert. Die definierte Lage der Schlagfläche 33 erlaubt es, das Projektil 4 mittels der Projektilsheber 7 derart in die Abschussposition einzulegen, dass der Abstand zwischen Stossfläche 43 und Schlagfläche 33 üblicherweise Bruchteilen eines Millimeters beträgt. Dadurch trifft die Schlagfläche 33 nach erfolgter Schussauslösung mit einer idealerweise vernachlässigbar kleinen Geschwindigkeit und mit einem vernachlässigbaren Winkel zwischen Schlagfläche 33 und Stossfläche 43 auf die Stossfläche 43 auf und beschleunigt das Projektil 4 zunehmend unter gegenseitiger Kontakthaltung. Der Führungsbalken 8 zwingt das Projektil 4' zu einer Linearbewegung in Abschussrichtung, wogegen das Schlagstück 34' eine Kreisbahn beschreibt, weshalb die Schlagfläche 33 unter Kontakthaltung vertikal zur Schussrichtung über die Stossfläche 43 gleitet.6a shows the striking lever 3 with the associated striking piece 34 and the projectile 4 in the firing position. The position of the striking surface 33 of the striking piece 34 is fixed by the alignment element 50 parallel or approximately parallel to the striking surface 43 of the projectile 4. The defined position of the striking surface 33 allows the projectile 4 to be inserted into the firing position by means of the projectile lifter 7 such that the distance between the striking surface 43 and the striking surface 33 is usually fractions of a millimeter. As a result, the striking surface 33 strikes the impact surface 43 at an ideally negligible speed and with a negligible angle between the striking surface 33 and the impact surface 43 and accelerates the projectile 4 increasingly while maintaining mutual contact. The guide beam 8 forces the projectile 4 'to move linearly in the firing direction, whereas the striker 34' describes a circular path, which is why the striking surface 33 slides vertically to the firing direction over the striking surface 43.

Fig. 6b zeigt den Schlaghebel 3 mit dem zugehörigen Schlagstück 34 nach Abschluss des Spannvorganges sowie verschiedene mögliche Stellungen des Schlagstückes 34‴, 34'' sowie 34' während dem Spannen des Schlaghebels 3. Das Schlagstück 34 weist ein Neigungsspiel δ auf, sodass die dargestellten Stellungen 34', 34'' und 34‴ des Schlagstückes zur Veranschaulichung der Wirkung der Leitfläche 51 ausgewählt wurden, die Stellungen jedoch nur ein Spezialfall vieler möglicher Stellungen, abhängig vom Neigungsspiel δ, sind.6b shows the striking lever 3 with the associated striking piece 34 after completion of the tensioning process and various possible positions of the striking piece 34 34, 34 ″ and 34 ′ during tensioning of the striking lever 3. The striking piece 34 has an inclination play δ, so that the illustrated Positions 34 ', 34' 'and 34 ‴ of the striking piece have been selected to illustrate the effect of the guide surface 51, but the positions are only a special case of many possible positions, depending on the inclination play δ.

Bezüglich dem Einfluss auf die Stellung des Schlagstückes 34 lassen sich im Leit- oder Ausrichtelement 50 vier Bereiche unterscheiden. Im Einlaufbereich σ' reduziert sich der Abstand zwischen der Leitfläche 51 und der kreisförmigen Bahn des Drehzentrum des Schlagstückes 34.With regard to the influence on the position of the impact piece 34, four areas can be distinguished in the guide or alignment element 50. In the inlet area σ ', the distance between the guide surface 51 and the circular path of the center of rotation of the impact piece 34 is reduced.

Nach einem Bereich σ'' mit konstantem Abstand folgt ein weiterer Bereich σ‴ mit sich reduzierendem Abstand und schliesslich der Bereich σ'''', der derart gestaltet ist, dass die Leitfläche 37 des Schlagstücks 34 sowie die Leitfläche 51 mindestens teilweise ohne Spiel aufeinander zu liegen kommen und dadurch die Lage des Schlagstückes 34 fixieren. Im dargestellten Beispiel beschränkt die Leitfläche 51 des Leitelementes 5 das Neigungsspiel δ des Schlagstücks 34 im Bereich σ‴, um im folgenden Bereich σ'''' das Schlagstück 34 spielfrei in einer definierten Lage zu fixieren. Es kann sich als vorteilhaft erweisen mit der Spielverengung des Neigungswinkels δ bereits in den Bereichen σ' sowie σ'' zu beginnen.After an area σ '' with a constant distance, another area σ ‴ with a decreasing distance follows and finally the area σ '' '', which is designed in such a way that the guide surface 37 of the striking piece 34 and the guide surface 51 are at least partially without play on one another come to rest and thereby fix the position of the striker 34. In the example shown, the guide surface 51 of the guide element 5 limits the inclination play δ of the striking piece 34 in the area σ ‴ in order to fix the striking piece 34 in a defined position without play in the following area σ '' ''. It may prove advantageous to start narrowing the angle of inclination δ already in the areas σ 'and σ' '.

Die Schläge der Leitfläche 37 auf die Leitfläche 51 während dem Spannen des Schlaghebels 3 lassen sich reduzieren oder sogar eliminieren, wenn der Aufprallwinkel der beiden Flächen möglichst flach ausfällt. Der Verlauf der Leitfläche 37 des Schlagstückes 34 kann, wie in Fig. 3a dargestellt, ebenfalls in einen Einlaufbereich Γ', einen Ausrichtbereich Γ'' sowie einen Haltebereich Γ‴ unterteil sein, um ein schlagarmes Zusammenwirken der beiden Leitflächen 37 und 51 zu ermöglichen.The impacts of the guide surface 37 on the guide surface 51 during the tensioning of the striking lever 3 can be reduced or even eliminated if the impact angle of the two surfaces is as flat as possible. The course of the guide surface 37 of the striking piece 34 can, as shown in FIG. 3a, also be part of an inlet area Γ ', an alignment area Γ' 'and a holding area Γ, in order to enable the two guide surfaces 37 and 51 to work together with little impact.

Zusätzlich kann der Winkelgeschwindigkeitsverlauf des Schlaghebels 3 während dem Spannen durch entsprechend geformte Nockenscheiben beeinflusst werden, sodass zum Beispiel der Bereich der ersten Kontaktnahme der beiden Leitflächen 37 und 51 mit einer entsprechend kleinen Winkelgeschwindigkeit durchfahren wird.In addition, the angular velocity profile of the impact lever 3 can be influenced during the tensioning by appropriately shaped cam disks, so that, for example, the area of the first contact between the two guide surfaces 37 and 51 is traversed at a correspondingly low angular velocity.

Die Schläge zwischen den Leitflächen 37 und 51 lassen sich weiter reduzieren indem das Ausrichtelement 50 besonders senkrecht zur Projektilschussbahn federne Eigenschaften aufweist, beispielsweise durch die Fertigung des Ausrichtelementes 50 aus einem weichen Material wie z.B. Kunststoff oder eine Lagerung des Ausrichtelementes 50 auf federnden Elementen.The blows between the guide surfaces 37 and 51 can be further reduced by the alignment element 50 having spring properties, particularly perpendicular to the projectile firing track, for example due to the production of the alignment element 50 made of a soft material such as plastic or a mounting of the alignment element 50 on resilient elements.

Fig. 6c zeigt den Schlaghebel 3 mit dem zugehörigen Schlagstück 34 nach Abschluss des Spannvorganges sowie verschiedene Stellungen des Schlagstückes 34‴, 34'' sowie 34' während dem Spannen des Schlaghebels 3. Im Gegensatz zu Fig. 6b fehlt der die Lage des Schlagstückes 34 fixierende Bereich σ'''', weshalb das Schlagstück 34 in der Ausgangsposition mit geringem Neigungsspiel behaftet ist.6c shows the striking lever 3 with the associated striking piece 34 after completion of the tensioning process and various positions of the striking piece 34 34, 34 ″ and 34 ′ during tensioning of the striking lever 3. In contrast to FIG. 6b, the position of the striking piece 34 is missing fixing area σ '' '', which is why the striker 34 in the starting position has little inclination play.

Die Lage des Schlagstückes 34 relativ zum Projektil 4 während der Beschleunigungsphase des Projektils 4 ist in Fig. 7 dargestellt. Ausgehend von der Lage 340' zu Beginn der Beschleunigung bewegt sich das Schlagstück 34 relativ zum Projektil zur Lage der maximalen Beschleunigung 340'', um die Projektilbeschleunigung in der Lage 340‴ zu beenden. Die Schlagfläche 33 gleitet unter Kontakthaltung vertikal zur Schussrichtung über die Stossfläche 43. Der Schwerpunkt S des Schlagstückes 34 hat mindestens vom Beschleunigungsbeginn 340' bis zur maximalen Beschleunigung 340'' in Abschussrichtung innerhalb der Stossfläche 43 des Projektils 4 zu liegen. Ein Abkippen des Schlagstückes 34 unter Aufhebung der flächigen Kontakthaltung sollte höchstens gegen Ende der Projektilbeschleunigung im Bereich der Stellung 340‴ erfolgen.The position of the impact piece 34 relative to the projectile 4 during the acceleration phase of the projectile 4 is shown in FIG. 7. Starting from the position 340 'at the beginning of the acceleration, the impact piece 34 moves relative to the projectile to the position of the maximum acceleration 340' 'in order to end the projectile acceleration in the position 340 ‴. The striking surface 33 slides vertically to the firing direction over the striking surface 43. The center of gravity S of the striking piece 34 must lie within the striking surface 43 of the projectile 4 at least from the start of acceleration 340 ′ to the maximum acceleration 340 ″ in the firing direction. Tilting of the striking piece 34 while lifting the flat contact should only take place towards the end of the projectile acceleration in the area of the position 340 ‴.

Ein weiteres Ausführungsbeispiel eines Ausrichtelementes ist in Fig. 8 gezeigt. Das Ausrichtelement 52 ist federartig ausgebildet, z.B. als Blattfeder, die in einem Einspannelement 53 eingespannt ist. Das Einspannelement 53 kann auch federnde Eigenschaften besitzen, derart, dass das Ausrichtelement 52 als starrer Körper ausführbar ist. Das Ausrichtelement 52 mit dem Einspannelement 53 kann natürlich auch ein Bestandteil des Ausrichtelementes 50 sein, indem z.B. das Ausrichtelement 52 den Haltebereich σ'''' bildet.Another embodiment of an alignment element is shown in FIG. 8. The alignment element 52 is designed in the manner of a spring, for example as a leaf spring which is clamped in a clamping element 53. The clamping element 53 can also have resilient properties such that the alignment element 52 can be designed as a rigid body is. The alignment element 52 with the clamping element 53 can of course also be a component of the alignment element 50, for example in that the alignment element 52 forms the holding region σ ''''.

Ein weiteres Ausführungsbeispiel eines Ausrichtelementes ist in Fig. 9 gezeigt. In den letzten Bruchteilen des Spannvorganges des Schlaghebels 3 trifft das gestrichelt dargestellte Schlagstück 34' mit einer vorzugsweise sehr kleinen Winkelgeschwindigkeit auf das Ausrichtelement 54 auf. Das Schlagstück 34 wird durch die weitere Drehung des Schlaghebels 3 durch das Ausrichtelement 54 ausgerichtet. Federnde Eigenschaften des Ausrichtelementes 54 in Abschussrichtung des Projektils 4 sind vorteilhaft.Another embodiment of an alignment element is shown in FIG. 9. In the last fractions of the tensioning process of the striking lever 3, the striking piece 34 ′ shown in dashed lines strikes the alignment element 54 at a preferably very low angular velocity. The striking piece 34 is aligned by the further rotation of the striking lever 3 by the alignment element 54. Resilient properties of the alignment element 54 in the firing direction of the projectile 4 are advantageous.

Wie in Fig. 10 dargestellt lässt sich das Schlagstück 34 auch durch ein aktives, motorisch angetriebenes Ausrichtelment 55 ausrichten, das zum Beispiel in der Ausgangsposition des Schlaghebels, vor der Schussauslösung, durch lineare oder drehende Bewegung die Neigung des Schlagstückes beeinflusst.As shown in FIG. 10, the striking piece 34 can also be aligned by an active, motor-driven alignment element 55 which, for example in the starting position of the striking lever before the firing of the shot, influences the inclination of the striking piece by linear or rotating movement.

Claims (19)

  1. A mechanism for accelerating the projectile (4) in a projectile
       loom, having a striker lever (3) fastened to a torsion bar and exhibiting a striker piece (34) which at the end of it remote from the torsion bar (2) is fastened so as to be able to turn and during the acceleration of the projectile (4) acts directly upon an impact face (43) on the projectile and moves along a circular path, characterized in that an alignment member (5) acts upon the striker piece (34) and influences the position of the striker piece in order that during triggering of the weft insertion a striker face (33) on the striker piece (34) lies adapted to the impact face (43) on the projectile (4).
  2. A mechanism as in Claim 1, characterized in that
       the striker piece (34) is supported to be able to turn at the end of the striker lever (3) by fasteners (35, 35') and is counterbalanced about this centre of rotation.
  3. A mechanism as in one of the Claims 1 or 2, characterized in that
       during the launching process one part of the striker face (33) acts upon one part of the impact face, though the impact face or striker face effective at any time during the launching process changes and/or shifts.
  4. A mechanism as in one of the Claims 1 to 3, characterized in that
       the striker piece (34) has the shape of a polygon the polygonal faces of which are the striker faces (33).
  5. A mechanism as in one of the Claims 1 to 3, characterized in that
       the striker piece (34) exhibits a single striker face (33) which during the launching process acts steadily against the impact face (43) on the projectile (4).
  6. A mechanism as in Claim 5, characterized in that
       the striker piece (34) is formed in the shape of a T, the wide part forming the striker face (33).
  7. A mechanism as in Claim 5, characterized in that
       the striker piece (34) is formed in the shape of a U, a plane area forming the striker face (33).
  8. A mechanism as in one of the Claims 1 to 7, characterized in that
       the striker piece (34) exhibits a definite angular play δ.
  9. A mechanism as in one of the Claims 1 to 8, characterized in that
       the striker piece (34) exhibits a guideface (37) having a curving outline which to correspond with the action of the alignment member (50) is composed of an entry range Γ', an alignment range Γ'' and a retainer range Γ'''.
  10. A mechanism as in one of the Claims 1 to 9, characterized in that
       from the start (340') of acceleration up to at least the range (340") of maximum acceleration the projection in the direction of launch of the centre of gravity of the striker piece (34) lies within the impact face (43) on the projectile (4).
  11. A mechanism as in one of the Claims 1 to 10, characterized in that
       before, at or after the triggering of the weft insertion, through the action of the alignment member (50) the striker face (33) on the striker piece (34) lies in parallel with or nearly in parallel with the impact face (43) on the projectile (4).
  12. A mechanism as in one of the Claims 1 to 11, characterized in that
       the alignment member (50) restricts the angular play δ of the striker piece (34) at least towards the end of the process of stressing the striker lever (3).
  13. A mechanism as in one of the Claims 1 to 12, characterized in that
       the passive alignment member (50) exhibits an aligning guideface (51) having a curved shape which is composd of at least one entry range σ' as well as an alignment range σ'''.
  14. A mechanism as in one of the Claims 1 to 13, characterized in that
       the aligning guideface (51) on the alignment member (50) forms a curve in which the alignment range σ''' reduces the angular play δ of the striker piece (34) to a fraction of its original range.
  15. A mechanism as in one of the Claims 1 to 14, characterized in that
       the aligning guideface (51) on the alignment member (50) forms a curve which includes in addition a retainer range σ'''' in which the play at the guideface (37) is cancelled.
  16. A mechanism as in one of the Claims 1 to 15, characterized in that
       the striker piece (34) is stopped twards the end of the stressing process against a passive alignment member (53) which restricts or eliminates the angular play δ of the striker piece (34).
  17. A mechanism as in one of the Claims 1 to 16, characterized in that
       the alignment member (52) has springy properties.
  18. A mechanism as in one of the Claims 1 to 12, characterized in that
       in the standstill phase of the striker lever (3) an active motor-operated alignment member (55) restricts or eliminates the angular play δ of the striker piece (34).
  19. A projectile loom having a mechanism for accelerating the projectile as in one of the Claims 1 to 18.
EP92810842A 1991-12-03 1992-11-03 Apparatus for accelerating projectiles from a dummy shuttle loom Expired - Lifetime EP0545855B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3546/91 1991-12-03
CH354691 1991-12-03

Publications (2)

Publication Number Publication Date
EP0545855A1 EP0545855A1 (en) 1993-06-09
EP0545855B1 true EP0545855B1 (en) 1996-02-21

Family

ID=4258318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810842A Expired - Lifetime EP0545855B1 (en) 1991-12-03 1992-11-03 Apparatus for accelerating projectiles from a dummy shuttle loom

Country Status (5)

Country Link
US (1) US5259422A (en)
EP (1) EP0545855B1 (en)
JP (1) JPH05247789A (en)
CN (1) CN1074961A (en)
DE (1) DE59205397D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6841600B2 (en) * 2001-10-17 2005-01-11 Lord Corporation Environmentally friendly adhesives for bonding vulcanized rubber
CN101032670B (en) * 2007-04-12 2010-09-22 麦特尔股份有限公司 Orbit ejecting device of a playmobile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124168A (en) * 1964-03-10 Shuttle picking mechanism for weaving machines
US2715422A (en) * 1952-11-03 1955-08-16 Sulzer Ag Shuttle picking mechanism
CH473925A (en) * 1967-05-26 1969-06-15 Sulzer Ag Loom
US4223703A (en) * 1978-08-17 1980-09-23 Sulzer Brothers Limited Picking mechanism for a shuttle of a weaving machine
CH636655A5 (en) * 1979-06-14 1983-06-15 Sulzer Ag Beating device for the projectiles of a weft-inserting projectile weaving machine
DE58905202D1 (en) * 1988-03-14 1993-09-16 Sulzer Ag PROJECTILE WEAVING MACHINE AND PROJECTILE FOR THE WEAVING MACHINE.

Also Published As

Publication number Publication date
JPH05247789A (en) 1993-09-24
CN1074961A (en) 1993-08-04
EP0545855A1 (en) 1993-06-09
US5259422A (en) 1993-11-09
DE59205397D1 (en) 1996-03-28

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