EP1975292A1 - Cam disc for a shedding mechanism of a loom - Google Patents
Cam disc for a shedding mechanism of a loom Download PDFInfo
- Publication number
- EP1975292A1 EP1975292A1 EP07006377A EP07006377A EP1975292A1 EP 1975292 A1 EP1975292 A1 EP 1975292A1 EP 07006377 A EP07006377 A EP 07006377A EP 07006377 A EP07006377 A EP 07006377A EP 1975292 A1 EP1975292 A1 EP 1975292A1
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- Prior art keywords
- cam
- movement
- motion
- movement phase
- different
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
- D03C5/02—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices operated by rotating cams
- D03C5/04—Construction or shape of cams
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/24—Features common to jacquards of different types
- D03C3/32—Jacquard driving mechanisms
- D03C3/36—Griffe operating mechanisms
Definitions
- the invention relates to a cam for an eccentric and such an eccentric.
- the DE 103 43 377 discloses a dobby in which individual shaft drives can be switched on and off. This purpose is a ratchet mechanism. As a result, healds can be kept selectively in the upper or lower reversal area, while other shafts move on. It is envisaged not to let the shafts come to rest in the reversal areas completely, but to move something up and down commuting. This achieves a reduction of the forces acting on the weaving shaft acceleration forces in the reverse areas. The movement in the reversal areas and the movement between the reversal areas takes place according to different laws of motion.
- the transitions between the law of motion in the inversion area and the law of motion between the inversion areas is designed so that the first time derivative of the shaft movement is the same in both laws of motion.
- the different laws of motion are implemented on different cams, which is switched by means of the ratchet mechanism from one cam to the other. Such dobby machines are relatively expensive and expensive.
- the cam according to the invention represents the sought-after component. It is preferably in permanent drive connection with a continuously running drive shaft and realizes on its curved or peripheral surface at least two different laws of motion. While one law of motion defines the course of motion between the upper and lower regions of the reverse of a hedge, the other law of motion describes the movement of the heald in its reverse regions.
- the laws of motion are selected so that the first and second time derivatives of the two laws of motion coincide with each other. This excludes at the transitions of the laws of motion shock and jerk. As a result, vibrations and wear are reduced or largely avoided. As a result, forces and loads on the shaft drive and on the heald are reduced.
- an existing shedding device e.g. an eccentric when equipped with the cams according to the invention are operated at higher speeds, without being damaged and without causing damage to the connecting rods, heddles, their parts and strands.
- a cam according to the invention has several different phases of movement.
- the movement phase a), a ') is the main movement phase (movement sequence between upper and lower reversal region)
- the movement phase b) is the upper end phase (upper reversal region)
- the movement phase c) is the lower end phase (lower reversal region).
- the heald passes through its stroke range in the downward movement
- the movement phases c), a ') and b) the heald passes through its stroke range in the upward movement.
- Both the main movement phase a), a ') and the phases b) and c) are movement phases in which the weave undergoes at least part of the path to be covered.
- the movement phase a), a ') is formed as a main phase in which the weave undergoes at least 50% of its stroke.
- the phases of movement b) and c), ie in the reverse areas the hedge completes its stroke and comes to rest or undergoes a waiting pendulum movement.
- the end phases which each represent a reversal region, can have different time lengths and also different stroke widths. They can be set differently from each other, as long as only the transitions to the main phase in the first and second derivative of the respective laws of motion match.
- a hive performs an upward and downward movement.
- the above movement described as a stroke can apply to both the downward movement and the upward movement of a heald.
- a cam according to the invention which defines an upward and downward movement of a heald consists of at least four movement phases, the movement phases b), c), a) and a ').
- a cam according to the invention can have several of the above-described movement phases. It is also conceivable that the movement phases are identical or partially identical.
- the cam is preferably associated with a KomplementärkurvenS as in conventional shedding devices. This has a complementary to the cam profile.
- FIG. 1 a weaving shank 1 is illustrated, which is vertically driven up and down by a linkage 2 by an eccentric machine 3.
- the vertical direction is indicated by an arrow as X-direction.
- the eccentric machine 3 has at its output a rocker 4, which is connected to the linkage 2.
- the rocker 4 performs a reciprocating motion, indicated by the arrow y in FIG. 4 , which is derived from the rotation of a main shaft 5.
- This is provided with a drive, such as an electric motor, and rotates at a substantially constant speed.
- a cam 6, as in FIG. 2 is illustrated. Its center of rotation 7 is determined by the main shaft 5. It has a peripheral surface 8 whose radius r is dependent on the rotation center 7 of a rotation angle ⁇ . On the peripheral surface 8 is a curve following means 9, for example in the form of a roller 10, which is supported by a pivot lever 11. This is about a pivot center 12 (indicated by arrow z in FIG. 2 ), wherein its pivotal movement is transmitted via a not further illustrated gear connection to the rocker 4.
- the peripheral surface 8 has a plurality of sections a, a ', b, c, which define different "laws of motion".
- motion laws is meant a function r ( ⁇ ).
- the radii of laws of motion b and c lie in areas that do not overlap.
- FIG. 3 directed. In FIG. 3 vertical is the Hub of the Webschaft and horizontally the time is shown.
- the area B1 shows the lift section in the movement phase c) (lower reverse area).
- the area B2 shows the lift section in the movement phase b) (upper reversal area).
- the area B3 shows the lift section in the movement phases a) and a ') (range of movement between the reverse areas).
- the stroke ranges B 1 and B 2 of the angle sections b and c do not overlap. They are separated by a region B 3 , which is assigned to the angle range a or a '.
- the regions a, a ', b, c represent movement phases for the curve following means 9 and thus for the weave 1.
- the laws of motion are different in these phases of movement, the transitions between the individual phases of motion b ⁇ a and a ⁇ c and c ⁇ a 'and a' ⁇ b are designed so that the first and second order derivatives of the adjacent merging laws of motion are the same.
- a cam according to the invention according to FIG. 2 and 4 can have laws of motion in the form of all mathematically comprehensible laws of motion such as sines, cosines, polynomials, etc and sums of them.
- a cam can also have laws of motion that are not analytically writable.
- the curve following means 9 performs a shock and jerk-free motion sequence with a correspondingly designed cam with the sections a, a ', b, c.
- the section a ' may represent an inverse main phase of movement to the section a.
- An eccentric cam machine of the type described above allows for optimizing the course of movement of the heald 1. Its acceleration and deceleration can be optimized. Furthermore, its speed in the movement phases a and a 'can be maximized without overloading the elements of the heald or elements of the eccentric machine 3. This makes it possible to maximize the time available for shooting entry even at high speeds.
- An optimized eccentric 3 includes cams 6 whose peripheral surface 8 sets different laws of motion in different sectors.
- the laws of motion serve a main movement phase a, a 'and end phases b, c, in which the shaft at most covers a smaller part of its movement. This proportion is preferably less than 50% of its total movement or its total stroke.
- the laws of motion of the different movement phases or sectors of the cam 6 are set so that at the crossing points the first and second derivatives of the laws of motion of the adjacent sectors coincide with each other.
Abstract
Description
Die Erfindung betrifft eine Kurvenscheibe für eine Exzentermaschine und eine solche Exzentermaschine.The invention relates to a cam for an eccentric and such an eccentric.
Zur Fachbildung dienen an Webmaschinen meist mehrere Webschäfte, die jeweils viele parallel zueinander angeordnete Litzen aufweisen, durch deren Fadenaugen die Kettfäden geführt sind. Zur Fachbildung werden die Webschäfte schnell auf und ab bewegt. Dazu dienen Schaftantriebe, die als Schaftmaschinen oder Exzentermaschinen bezeichnet werden. Exzentermaschinen erzeugen dabei aus der drehenden Bewegung einer Antriebswelle eine schwingende hin und her gehende Bewegung, aus der die Auf- und Abbewegung der Webschäfte hergeleitet wird. Es können hohe Webgeschwindigkeiten erreicht werden.To shed serve on looms usually several Webshafts, each having many parallel strands have, through the thread eyes the warp threads are performed. For shedding, the healds are moved up and down quickly. Serve this shaft drives, which are referred to as dobby or eccentric machines. Eccentric machines generate from the rotating movement of a drive shaft a swinging reciprocating motion, from which the up and down movement of the heald frames is derived. High web speeds can be achieved.
Bei der Auf- und Abbewegung der Webschäfte entstehen an den Webschäften, deren Teilen, den Weblitzen, der Schaftmaschine und dem Verbindungsgestänge zwischen Webschaft und Schaftmaschine hohe dynamische Lasten.During the up and down movement of the heald frames arise on the heald frames, their parts, the healds, the dobby and the linkage between heald and dobby high dynamic loads.
Die
Zur Fachbildung kommen in den Webereien verschiedene Fachbildeeinrichtungen zum Einsatz. Dabei handelt es sich um so genannte Schaftmaschinen, Exzentermaschinen und Jacquardmaschinen. Sowohl in Exzentermaschinen wie auch in Jacquardmaschinen sind keine Klinkenschaltwerke zum Zu- und Abschalten einzelner Exzenterscheiben vorgesehen. Bei diesen Maschinen kommt es jedoch darauf an, die Webgeschwindigkeiten zu erhöhen und Belastungen zu minimieren.For shedding, different shedding facilities are used in the weaving mills. These are so-called dobby machines, eccentric machines and Jacquard machines. Both in eccentric machines as well as in Jacquard machines no ratchet mechanism for switching on and off of individual eccentric discs are provided. With these machines, however, it is important to increase the web speeds and minimize loads.
Davon ausgehend ist es Aufgabe der Erfindung, eine Fachbildeeinrichtung bzw. eine für diese Fachbildeeinrichtung geeignete Komponente anzugeben, mit der sich die Arbeitsgeschwindigkeit der Webmaschine erhöhen lässt, ohne deren Teile zu überlasten.On this basis, it is an object of the invention to provide a shedding device or a suitable for this shedding device component with which the operating speed of the loom can be increased without overloading their parts.
Diese Aufgabe wird mit der Kurvenscheibe nach Anspruch 1 gelöst:This object is achieved with the cam according to claim 1:
Die erfindungsgemäße Kurvenscheibe stellt die gesuchte Komponente dar. Sie steht vorzugsweise in permanenter Antriebsverbindung mit einer ständig laufenden Antriebswelle und realisiert an ihrer Kurven- bzw. Umfangsfläche zumindest zwei unterschiedliche Bewegungsgesetze. Während das eine Bewegungsgesetz den Bewegungsablauf zwischen oberem und unterem Umkehrbereich eines Webschafts festlegt, beschreibt das andere Bewegungsgesetz die Bewegung des Webschafts in seinen Umkehrbereichen. Die Bewegungsgesetze sind so ausgewählt, dass die erste und zweite Zeitableitung der beiden Bewegungsgesetze miteinander übereinstimmen. Dies schließt an den Übergängen der Bewegungsgesetze Stoß und Ruck aus. Dadurch werden Schwingungen und Abnutzung reduziert bzw. weitgehend vermieden. In der Folge davon werden Kräfte und Belastungen an dem Schaftantrieb und an dem Webschaft verringert. Somit kann eine bestehende Fachbildeeinrichtung z.B. eine Exzentermaschine, wenn sie mit den erfindungsgemäßen Kurvenscheiben ausgerüstet wird, mit höheren Tourenzahlen betrieben werden, ohne Schaden zu nehmen und ohne Schaden and den Verbindungsgestängen, Webschäften, deren Teilen und Litzen zu verursachen.The cam according to the invention represents the sought-after component. It is preferably in permanent drive connection with a continuously running drive shaft and realizes on its curved or peripheral surface at least two different laws of motion. While one law of motion defines the course of motion between the upper and lower regions of the reverse of a hedge, the other law of motion describes the movement of the heald in its reverse regions. The laws of motion are selected so that the first and second time derivatives of the two laws of motion coincide with each other. This excludes at the transitions of the laws of motion shock and jerk. As a result, vibrations and wear are reduced or largely avoided. As a result, forces and loads on the shaft drive and on the heald are reduced. Thus, an existing shedding device, e.g. an eccentric when equipped with the cams according to the invention are operated at higher speeds, without being damaged and without causing damage to the connecting rods, heddles, their parts and strands.
Eine erfindungsgemäße Kurvenscheibe weist mehrere unterschiedliche Bewegungsphasen auf. Die Bewegungsphase a), a') ist die hauptsächliche Bewegungsphase (Bewegungsablauf zwischen oberem und unterem Umkehrbereich), die Bewegungsphase b) ist die obere Endphase (oberer Umkehrbereich) und die Bewegungsphase c) ist die untere Endphase (unterer Umkehrbereich). In den Bewegungsphasen b), a) und c) durchläuft der Webschaft seinen Hubbereich in der Abwärtsbewegung, in den Bewegungsphasen c), a') und b) durchläuft der Webschaft seinen Hubbereich in der Aufwärtsbewegung. Sowohl die hauptsächliche Bewegungsphase a), a') als auch die Phasen b) und c) sind Bewegungsphasen, in denen der Webschaft zumindest einen Teil des zurückzulegenden Wegs durchläuft. Sie können beispielsweise eine Auf- und Abbewegung des Webschafts innerhalb eines Umkehrbereichs erzeugen. Sie können aber ebenso gut eine Bewegung erzeugen, die wie üblich kurzzeitig zur Ruhe kommt und in Ruhe verharrt, wobei auch in einem solchen Fall der Übergang zwischen den Bewegungsgesetzen der Phasen b), und a) oder a) und c) oder c) und a') oder a') und b) jeweils unter Gleichheit der ersten und zweiten Weg- oder Zeitableitung der Bewegungsgesetze erfolgt. Dies ergibt einen ruck- und stoßfreien Übergang der Schaftbewegung von einer Phase der Bewegung zur nächsten. Durch die Variation der Längen der Bewegungsphasen und die Wahl der jeweiligen Bewegungsgesetze lassen sich Schaftbewegungen erzeugen, die die Webschäfte wesentlich weniger beanspruchen und höhere Webmaschinendrehzahlen zulassen. Der hauptsächliche Teil der Bewegung der Phase a), a') kann dabei optimiert werden, ohne auf die Erfordernisse der Bewegungen während der Phasen b) und c) Rücksicht nehmen zu müssen.A cam according to the invention has several different phases of movement. The movement phase a), a ') is the main movement phase (movement sequence between upper and lower reversal region), the movement phase b) is the upper end phase (upper reversal region) and the movement phase c) is the lower end phase (lower reversal region). In the movement phases b), a) and c), the heald passes through its stroke range in the downward movement, in the movement phases c), a ') and b) the heald passes through its stroke range in the upward movement. Both the main movement phase a), a ') and the phases b) and c) are movement phases in which the weave undergoes at least part of the path to be covered. For example, you can create an up and down motion of the weave within an inversion area. But you can just as well create a movement that comes as usual for a short while to rest and remains in peace, and in such a case, the transition between the laws of motion of the phases b), and a) or a) and c) or c) and a ') or a') and b) takes place under equality of the first and second path or time derivation of the laws of motion. This results in a smooth and shock-free transition of the shaft movement from one phase of movement to the next. By varying the lengths of the movement phases and the choice of the respective laws of motion, shaft movements can be generated, which load the healds much less and allow higher weaving machine speeds. The main part of the movement of phase a), a ') can be optimized without having to take into account the requirements of the movements during phases b) and c).
Bevorzugterweise ist die Bewegungsphase a), a') als Hauptphase ausgebildet, in der der Webschaft wenigstens 50 % seines Hubs durchläuft. In den Bewegungsphasen b)und c), d.h. in den Umkehrbereichen, vollendet der Webschaft seinen Hub und kommt zur Ruhe oder durchläuft eine abwartende Pendelbewegung. In der Hauptphase und in der Endphase gelten unterschiedliche Bewegungsgesetze. Die Endphasen, die beide jeweils einen Umkehrbereich darstellen, können unterschiedliche zeitliche Längen und auch unterschiedliche Hubweiten aufweisen. Sie können voneinander abweichend festgelegt werden, so lange nur die Übergänge zur Hauptphase in erster und zweiter Ableitung der jeweiligen Bewegungsgesetze übereinstimmen.Preferably, the movement phase a), a ') is formed as a main phase in which the weave undergoes at least 50% of its stroke. In the phases of movement b) and c), ie in the reverse areas, the hedge completes its stroke and comes to rest or undergoes a waiting pendulum movement. In the main phase and in the final phase different laws of motion apply. The end phases, which each represent a reversal region, can have different time lengths and also different stroke widths. They can be set differently from each other, as long as only the transitions to the main phase in the first and second derivative of the respective laws of motion match.
Im Betrieb führt ein Webschaft eine Aufwärts- und Abwärtsbewegung durch. Die vorstehende als Hub beschriebene Bewegung kann sowohl für die Abwärtsbewegung, wie auch für die Aufwärtsbewegung eines Webschafts gelten.In operation, a hive performs an upward and downward movement. The above movement described as a stroke can apply to both the downward movement and the upward movement of a heald.
Eine erfindungsgemäße Kurvenscheibe, welche eine Aufwärts- und Abwärtsbewegung eines Webschafts festlegt besteht mindestens aus vier Bewegungsphasen, den Bewegungsphasen b), c), a) und a'). Abhängig von dem herzustellenden textilen Flächenprodukt kann eine erfindungsgemäße Kurvenscheibe mehrere der oben beschriebenen Bewegungsphasen aufweisen. Es ist auch denkbar, dass die Bewegungsphasen identisch oder teilweise identisch sind.A cam according to the invention, which defines an upward and downward movement of a heald consists of at least four movement phases, the movement phases b), c), a) and a '). Depending on the textile surface product to be produced, a cam according to the invention can have several of the above-described movement phases. It is also conceivable that the movement phases are identical or partially identical.
Der Kurvenscheibe ist wie bei sonst üblichen Fachbildeeinrichtungen vorzugsweise eine Komplementärkurvenscheibe zugeordnet. Diese weist ein zu der Kurvenscheibe komplementäres Profil auf.The cam is preferably associated with a Komplementärkurvenscheibe as in conventional shedding devices. This has a complementary to the cam profile.
Weitere Einzelheiten vorteilhafter Ausführungsformen der Erfindung ergeben sich aus der Zeichnung, der Beschreibung oder Ansprüchen.Further details of advantageous embodiments of the invention will become apparent from the drawings, the description or claims.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung veranschaulicht. Es zeigen:
-
einen Webschaft mit einer Exzentermaschine zum Antrieb desselben in schematisierter Ansicht,Figur 1 -
eine Kurvenscheibe und ein Kurvenfolgemittel der Exzentermaschine nachFigur 2 ,Figur 1 -
die Kontur der Kurvenscheibe nachFigur 3 als Diagramm,Figur 2 -
Figur 4 eine abgewandelte Ausführungsform einer Kurvenscheibe in stark überhöhter Darstellung und -
die Bewegungsgesetze der Kurvenscheibe nachFigur 5Figur 4 als Diagramm.
-
FIG. 1 a weaving shank with an eccentric machine for driving the same in a schematic view, -
FIG. 2 a cam and a Kurvenfolgemittel the eccentric afterFIG. 1 . -
FIG. 3 the contour of the cam afterFIG. 2 as a diagram, -
FIG. 4 a modified embodiment of a cam in greatly inflated presentation and -
FIG. 5 the laws of motion of the cam afterFIG. 4 as a diagram.
In
Auf der Hauptwelle 5 sitzt eine Kurvenscheibe 6, wie sie in
Die Umfangsfläche 8 weist mehrere Abschnitte a, a', b, c auf, die unterschiedliche "Bewegungsgesetze" festlegen. Unter Bewegungsgesetzen wird dabei eine Funktion r(α) verstanden. Außerdem liegen die Radien der Bewegungsgesetze b und c in Bereichen, die einander nicht überschneiden. Zur Wahl der Bewegungsgesetze für die Bereiche a, a', b und c wird auf
Die Bereiche a, a', b, c stellen Bewegungsphasen für das Kurvenfolgemittel 9 und somit für den Webschaft 1 dar. Die Bewegungsgesetze sind in diesen Bewegungsphasen unterschiedlich, wobei die Übergänge zwischen den einzelnen Bewegungsphasen b → a und a → c und c → a' und a' → b so gestaltet sind, dass die Ableitungen erster und zweiter Ordnung der benachbarten ineinander übergehenden Bewegungsgesetze gleich sind. Eine erfindungsgemäße Kurvenscheibe gemäß
Unter Beachtung obiger Übergangsbedingungen führt das Kurvenfolgemittel 9 bei einer entsprechend gestalteten Kurvenscheibe mit den Abschnitten a, a', b, c einen stoß- und ruckfreien Bewegungsablauf aus. Der Abschnitt a' kann eine zu dem Abschnitt a inverse Hauptbewegungsphase darstellen.Taking into account the above transitional conditions, the curve following means 9 performs a shock and jerk-free motion sequence with a correspondingly designed cam with the sections a, a ', b, c. The section a 'may represent an inverse main phase of movement to the section a.
Während bei dem vorstehenden Ausführungsbeispiel in den Bewegungsphasen b und c eine Bewegung vorgesehen worden ist, die an den äußeren Enden der Umkehrbereiche B1 und B2 nahezu zur Ruhe kommt, können auch andere Bewegungsgesetze vorgesehen werden, wie
Eine Exzentermaschine mit Kurvenscheiben der vorstehend beschriebenen Art gestattet eine Optimierung des Bewegungsverlaufes des Webschafts 1. Seine Beschleunigung und sein Abbremsen können optimiert werden. Des Weiteren kann seine Geschwindigkeit in den Bewegungsphasen a und a' maximiert werden, ohne die Elemente des Webschafts oder Elemente der Exzentermaschine 3 zu überlasten. Damit lassen sich auch bei hohen Tourenzahlen die zum Schusseintrag zur Verfügung stehenden Zeitspannen maximieren.An eccentric cam machine of the type described above allows for optimizing the course of movement of the
Eine optimierte Exzentermaschine 3 enthält Kurvenscheiben 6, deren Umfangsfläche 8 in verschiedenen Sektoren unterschiedliche Bewegungsgesetze festlegt. Die Bewegungsgesetze dienen einer Hauptbewegungsphase a, a' und Endphasen b, c, in denen der Schaft allenfalls einen geringeren Teil seiner Bewegung zurücklegt. Dieser Anteil liegt vorzugsweise unter 50 % seiner Gesamtbewegung bzw. seines Gesamthubs. Die Bewegungsgesetze der unterschiedlichen Bewegungsphasen bzw. Sektoren der Kurvenscheibe 6 sind so festgelegt, dass an den Übergangsstellen die erste und zweite Ableitung der Bewegungsgesetze der benachbarten Sektoren miteinander übereinstimmen.An optimized eccentric 3 includes
- 11
- Webschaftheald
- 22
- Gestängelinkage
- 33
- ExzentermaschineA sander
- 44
- Schwingewing
- 55
- Hauptwellemain shaft
- 66
- Kurvenscheibecam
- 77
- Drehzentrumturning center
- 88th
- Umfangsflächeperipheral surface
- 99
- KurvenfolgemittelCam follower means
- 1010
- Rollerole
- 1111
- Schwenkhebelpivoting lever
- 1212
- Schwenkzentrumpivoting center
Claims (13)
wobei die Kurvenscheibe (6) ein Drehzentrum (7) und eine Umfangsfläche (8) aufweist, deren Radius (r) variiert, um, wenn sie dreht, einem an der Umfangsfläche (8) anliegenden Kurvenfolgemittel (9) eine Hubbewegung zu erteilen,
wobei die Umfangsfläche (8) in einen ersten Abschnitt (a), einen zweiten Abschnitt (b), einen dritten Abschnitt (a') und einen vierten Abschnitt (c) unterteilt ist, denen unterschiedliche Bewegungsphasen eines an das Kurvenfolgemittel (9) angeschlossenen Webschafts (1) entsprechen,
wobei die unterschiedlichen Abschnitte (a, a', b, c) unterschiedlichen Bewegungsgesetzen (entsprechen und
wobei die unterschiedlichen Bewegungsgesetze wo sie aneinander anschließen, in der ersten und zweiten Ableitung miteinander übereinstimmen.Cam plate (6) for a shedding device (3) of a weaving machine,
the cam disc (6) having a center of rotation (7) and a peripheral surface (8) whose radius (r) varies to impart, when rotating, a cam follower (9) abutting the peripheral surface (8),
wherein the peripheral surface (8) is subdivided into a first section (a), a second section (b), a third section (a ') and a fourth section (c) having different phases of movement of a heald connected to the curve following means (9) (1)
wherein the different sections (a, a ', b, c) correspond to different laws of motion (and
wherein the different laws of motion where they adjoin one another in the first and second derivative agree with each other.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE200750005459 DE502007005459D1 (en) | 2007-03-28 | 2007-03-28 | Cam for a shedding device of a loom |
EP20070006377 EP1975292B1 (en) | 2007-03-28 | 2007-03-28 | Cam disc for a shedding mechanism of a loom |
CN2008100874151A CN101275324B (en) | 2007-03-28 | 2008-03-27 | Cam disc for a shedding mechanism of a loom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070006377 EP1975292B1 (en) | 2007-03-28 | 2007-03-28 | Cam disc for a shedding mechanism of a loom |
Publications (2)
Publication Number | Publication Date |
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EP1975292A1 true EP1975292A1 (en) | 2008-10-01 |
EP1975292B1 EP1975292B1 (en) | 2010-10-27 |
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ID=38481139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20070006377 Expired - Fee Related EP1975292B1 (en) | 2007-03-28 | 2007-03-28 | Cam disc for a shedding mechanism of a loom |
Country Status (3)
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EP (1) | EP1975292B1 (en) |
CN (1) | CN101275324B (en) |
DE (1) | DE502007005459D1 (en) |
Cited By (2)
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EP2278052A1 (en) | 2009-07-20 | 2011-01-26 | Groz-Beckert KG | Shaft drive for a heald frame of a loom |
CN104480608A (en) * | 2015-01-19 | 2015-04-01 | 徐心亿 | Swinging mechanism in jacquard |
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CN106321766B (en) * | 2015-06-30 | 2018-08-07 | 健腾精密机电股份有限公司 | The pod profile of more roller type fluctuation drivers, the design method of pod wheel profile and cam contour |
CN105002621A (en) * | 2015-08-24 | 2015-10-28 | 吴江万工机电设备有限公司 | Amend method for cosinusoidal motion law of negative shedding cam |
CN105506810A (en) * | 2016-01-25 | 2016-04-20 | 上海超诚电子科技有限公司 | Jacquard transmission mechanism |
Citations (11)
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FR965418A (en) * | 1947-05-08 | 1950-09-12 | ||
FR1251942A (en) * | 1960-03-25 | 1961-01-20 | Goetaverken Ab | Cam enhancements for actuating a reciprocating spring return element, for example the exhaust valve of an internal combustion engine |
AU431760B2 (en) * | 1968-11-26 | 1973-01-15 | Cannon Mills Company | Shuttleless terry loom warp shedding means and method |
GB1335412A (en) * | 1970-07-27 | 1973-10-31 | Ustav Pro Vyzkum Motorovych Vo | Cam consisting of several elements with a cont'nuous or non- continuous acceleration curve |
DE2329734A1 (en) * | 1972-06-12 | 1974-01-17 | Automobilove Zavody Np | MULTI-ELEMENT NOCKS WITH CONTINUOUS ACCELERATION PROGRESS |
JPH03152233A (en) * | 1989-11-08 | 1991-06-28 | Murata Mach Ltd | Structure of cam in cam dobby loom |
DE19538018A1 (en) * | 1995-01-16 | 1996-07-18 | Staeubli Gmbh | Modulating drive for loom dobby head has increased dwell angle |
EP0768403A1 (en) * | 1995-10-11 | 1997-04-16 | Brevtex Sa | Dobby with correlated and superimposed cams for the desmodromic operation of weaving looms |
DE10343377B3 (en) * | 2003-09-17 | 2005-04-28 | Groz Beckert Kg | Shaft drive for weaving shafts |
EP1582612A2 (en) * | 2004-03-29 | 2005-10-05 | STAUBLI Faverges | Complementary cam for a shedding mechanism of a loom and its manufacturing process |
DE102005021788A1 (en) * | 2005-05-11 | 2005-10-20 | Hermann Krueger | Production of a three-dimensional cam used for variable actuation of lifting valves in internal combustion engines comprises creating an elevation section and a circular cylindrical section from parts of the periphery of a rotation body |
-
2007
- 2007-03-28 DE DE200750005459 patent/DE502007005459D1/en active Active
- 2007-03-28 EP EP20070006377 patent/EP1975292B1/en not_active Expired - Fee Related
-
2008
- 2008-03-27 CN CN2008100874151A patent/CN101275324B/en not_active Expired - Fee Related
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR965418A (en) * | 1947-05-08 | 1950-09-12 | ||
FR1251942A (en) * | 1960-03-25 | 1961-01-20 | Goetaverken Ab | Cam enhancements for actuating a reciprocating spring return element, for example the exhaust valve of an internal combustion engine |
AU431760B2 (en) * | 1968-11-26 | 1973-01-15 | Cannon Mills Company | Shuttleless terry loom warp shedding means and method |
GB1335412A (en) * | 1970-07-27 | 1973-10-31 | Ustav Pro Vyzkum Motorovych Vo | Cam consisting of several elements with a cont'nuous or non- continuous acceleration curve |
DE2329734A1 (en) * | 1972-06-12 | 1974-01-17 | Automobilove Zavody Np | MULTI-ELEMENT NOCKS WITH CONTINUOUS ACCELERATION PROGRESS |
JPH03152233A (en) * | 1989-11-08 | 1991-06-28 | Murata Mach Ltd | Structure of cam in cam dobby loom |
DE19538018A1 (en) * | 1995-01-16 | 1996-07-18 | Staeubli Gmbh | Modulating drive for loom dobby head has increased dwell angle |
EP0768403A1 (en) * | 1995-10-11 | 1997-04-16 | Brevtex Sa | Dobby with correlated and superimposed cams for the desmodromic operation of weaving looms |
DE10343377B3 (en) * | 2003-09-17 | 2005-04-28 | Groz Beckert Kg | Shaft drive for weaving shafts |
EP1582612A2 (en) * | 2004-03-29 | 2005-10-05 | STAUBLI Faverges | Complementary cam for a shedding mechanism of a loom and its manufacturing process |
DE102005021788A1 (en) * | 2005-05-11 | 2005-10-20 | Hermann Krueger | Production of a three-dimensional cam used for variable actuation of lifting valves in internal combustion engines comprises creating an elevation section and a circular cylindrical section from parts of the periphery of a rotation body |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2278052A1 (en) | 2009-07-20 | 2011-01-26 | Groz-Beckert KG | Shaft drive for a heald frame of a loom |
CN104480608A (en) * | 2015-01-19 | 2015-04-01 | 徐心亿 | Swinging mechanism in jacquard |
CN104480608B (en) * | 2015-01-19 | 2016-02-10 | 李素凤 | Swing mechanism in a kind of jacquard |
Also Published As
Publication number | Publication date |
---|---|
EP1975292B1 (en) | 2010-10-27 |
DE502007005459D1 (en) | 2010-12-09 |
CN101275324B (en) | 2011-06-01 |
CN101275324A (en) | 2008-10-01 |
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