EP0290008A2 - Flat-bed knitting machine - Google Patents

Abstract

A flat knitting machine has spring shaft needles (32) with needle feet (35, 36), sliding boards with feet and displaceable jacquard boards (34) with at least two feet each, and a lock system for selecting and actuating the needles and boards in the needle channels of the needle beds (31) which, in turn, has at least two needle countersinks (23, 24) which can be displaced in the lock plane. In order to simplify the construction of the lock and knitting system and to improve its operating properties, the sliding plate is designed as a displaceable lifting plate (33) with a lifting plate foot (38) and a stop in front of this, against which the rear end of the spring shaft needle (32) can abut , the jacquard board (34) is designed with a jacquard board foot (39), a selection foot (40) and a retractable sliding foot (41), and in the lock system there are selection flaps (42) for needle selection and fixed lock parts (43) for driving out selected jacquard boards (34 ) intended.

Description

The invention relates to a flat knitting machine with spring shaft needles arranged in the needle channels of the needle beds, each having a front needle foot that always protrudes from the needle bed and a rear needle foot that disappears in the needle bed due to the spring shaft being self-supporting, with sliding boards arranged behind the spring shaft needles one working foot each and a front end that can be slid under the spring shaft of the spring shaft needle to selectively lift the second needle foot, with jacquard boards with at least two feet each that are arranged behind the sliding boards, slidably sliding on these, and with a lock system for selecting and actuating the needles and boards, which has at least two needle counterbores arranged symmetrically to the central longitudinal axis of the lock system and displaceable in the lock plane in the region of the second needle feet.

Such a flat knitting machine is known for example from DE-35 23 989 C1. The sliding boards are designed there as latching boards, while the needles are selected by engaging selection flaps on a selection foot of the jacquard boards and thereby driving out the jacquard boards.

The known flat knitting machine achieves that the needle channel milling in the needle bed can be carried out without a shoulder, i.e. in a milling cycle with a constant milling depth, without the full variety of binding technologies including transferring stitches and knitting with different pull-off depths within a knitting row.

The invention has for its object to provide a flat knitting machine of the type described in the introduction, in which the structure of the lock and knitting system is further simplified and its operating properties are additionally improved.

• a) die Schiebeplatine als reine verschiebbare Hebeplatine mit einem Hebeplatinenfuß und einem vor diesem angeordneten Anschlag, an den das hintere Nadelende der Federschaftnadel bei angehobenem Federschaft anstoßen kann, ausgebildet ist,
• b) die Jacquardplatine mit einem vorderen Jacquardplatinenfuß, einem mittleren Selektionsfuß und einem hinteren, in das Nadelbett selektiv versenkbaren Schiebefuß ausgebildet ist, und
• c) im Schloßsystem verschwenkbare Selektionsklappen zum selektiven Nadelauswählen durch Zusammenarbeit mit den Selektionsfüßen und feststehende Schloßteile zum Austreiben ausgewählter Jacquardplatinen durch Angriff an deren Schiebefuß vorgesehen sind.

This object is achieved in that

• a) the sliding plate is designed as a pure displaceable lifting plate with a lifting plate foot and a stop arranged in front of it, against which the rear needle end of the spring shaft needle can abut when the spring shaft is raised,
• b) the jacquard plate is formed with a front jacquard plate foot, a middle selection foot and a rear sliding foot that can be selectively lowered into the needle bed, and
• c) in the lock system pivotable selection flaps for selective needle selection by cooperation with the selection feet and fixed lock parts for driving out selected jacquard boards by attacking their sliding foot are provided.

With a lock and knitting system of the flat knitting machine constructed in this way, the structure is simple and Reliable lock system implemented for constant needle removal during operation.

In the lock system in the area of the first needle feet, which are symmetrical to the central longitudinal axis of the lock system, two further needle countersinkable in the lock plane and one symmetrical to the central longitudinal axis, switchable into and out of the lock plane and in the area of the second needle feet and the lifting plate feet, four more are advantageously arranged in and out of the lock level switchable lock parts are provided. This results in a lock system for selective needle withdrawal.

With the flat knitting machine according to the invention, a needle selection possibility is created which realizes the full variety of binding technologies including transferring stitches and knitting with different draw-off depths within a knitting row with a very simple and reliable compact lock construction.

The further switchable lock parts in the area of the second needle feet as well as the further switchable lock parts in the area of the lifting board feet are expediently arranged symmetrically to the central longitudinal axis of the lock system.

To form long and short stitches, the switchable lock part in the area of the first needle feet and the switchable lock parts in the area of the second needle feet and the lifting board feet are advantageously switchable in action, while forming long stitches and short stitches Catch handles the switchable lock part in the area of the first needle feet and the switchable lock parts in the area of the second needle feet out of action and the switchable lock parts in the area of the lifting board feet are switchable in action.

The switchable lock part in the area of the first needle feet and the switchable lock parts in the area of the second needle feet as well as the switchable lock parts in the area of the lifting board feet are expediently switchable together into and out of the lock level.

A lock part which is symmetrical to the central longitudinal axis of the lock system is advantageously provided for holding the lifting plate on its lifting plate foot against a withdrawal movement on its upper edge of the lock part and against an expulsion movement on its lower edge of the lock part.

At a first selection point, two fixed lock parts arranged symmetrically to the central longitudinal axis of the lock system are advantageously provided for pushing apart the sinker feet and front jacquard board feet, while at a second selection point a fixed lock part symmetrical to the central longitudinal axis of the lock system is provided for driving out the lifting board feet and holding the jacquard board feet against an ejection movement is. It goes without saying that two first selection points and two second selection points are provided in each case arranged symmetrically to the central longitudinal axis of the lock system, in order to be able to carry out the full variety of knitting processes in each slide running direction.

The selection feet of successive jacquard boards and the associated selection flaps are expediently staggered in a known manner in the longitudinal direction of the needle channel.

• Fig. 1 eine Draufsicht auf eine bevorzugte Ausführungsform eines Schloßsystems für selektiven Nadelabzug gemäß der Erfindung in schematischer Darstellung,
• Fig. 2 eine Draufsicht auf eine Ausführungsform eines Schloßsystems für konstanten Nadelabzug gemäß der Erfindung in schematischer Darstellung,
• Fig. 3 das Schloßsystem für selektiven Nadelabzug nach Fig. 1 zur Darstellung des Nadel- und Platinenlaufs für die Drei-Weg-Technik,
• Fig. 4 bis 9 Querschnitte durch ein Nadelbett längs eines Nadelkanals für verschiedene Positionen von Federschaftnadel, Hebeplatine und Jacquardplatine,
• Fig. 10 eine Draufsicht wie in Fig. 1, geschaltet zum Bilden von langen und kurzen Maschen,
• Fig. 11 eine Draufsicht wie in Fig. 1, geschaltet zum Bilden langer Maschen und kurzer Fanghenkel,
• Fig. 12 eine Draufsicht wie in Fig. 2 zur Darstellung des Nadel- und Platinenlaufs für die Drei-Weg-Technik, und
• Fig. 13 eine Draufsicht wie in Fig. 2 zur Darstellung des Nadel- und Platinenlaufs beim Übergeben von Maschen.

The invention is explained below using exemplary embodiments and with reference to the drawings. Show in the drawings

• 1 is a plan view of a preferred embodiment of a lock system for selective needle withdrawal according to the invention in a schematic representation,
• 2 is a plan view of an embodiment of a lock system for constant needle withdrawal according to the invention in a schematic representation,
• 3 shows the lock system for selective needle withdrawal according to FIG. 1 to illustrate the needle and sinker run for the three-way technique,
• 4 to 9 cross sections through a needle bed along a needle channel for different positions of spring shaft needle, lifting plate and jacquard plate,
• 10 is a plan view as in FIG. 1, switched to form long and short stitches,
• 11 is a plan view as in Fig. 1, switched to form long stitches and short tuck handles,
• Fig. 12 is a plan view as in Fig. 2 showing the needle and sinker barrel for the three-way technique, and
• Fig. 13 is a plan view as in Fig. 2 showing the needle and sinker run when passing stitches.

The lock system for selective needle withdrawal as shown in Fig. 1 consists of non-hatched, fixed lock parts, five hatched lock parts 16, 17, 18, 19, 20, which are controllable and can be brought into and out of operation as desired, and four movable in the double arrow direction Needle countersink 21, 22, 23 and 24. Here, as in the following, the lock parts 16, 17, 18, 19 and 20 are always shown hatched when they are switched off from the lock level out of action. The lock system is symmetrical to its central longitudinal axis M.

Fig. 2 shows a lock system for constant needle withdrawal, which, apart from the two needle counters 23, 24 displaceable in the double arrow direction, only consists of non-hatched, fixed lock parts. This lock system is again symmetrical to its central longitudinal axis M.

The needle and sinker run for the three-way technique through the lock system for selective needle withdrawal will be described below with reference to FIG. 3. The hatched lock parts 16, 17, 18, 19, 20 are inactive here.

• Position 1: Grundstellung in Kammgleiche
• Position 2: Jacquard-Auswahl/Masche/Übergeben
• Position 3: Nadelfuß angehoben - Beginn Übergeben
• Position 4: Nadel außer Tätigkeit
• Position 5: Beginn Masche
• Position 6: Jacquard-Auswahl/Fang
• Position 7: Nadelfuß angehoben - Beginn Fang
• Position 8: Masche
• Position 9: Fang
• Position 10: Masche
• Position 11: Fang
• Position 12: Masche
• Position 13: Fang
• Position 14: Masche
• Position 15: Grundstellung.

The arrows A in FIGS. 3 and 10 to 13 represent the running direction of the lock system from right to left. In FIG. 3, different positions 1 to 15 are indicated for a spring shaft needle 32, a lifting plate 33 and a jacquard plate 34. These positions are:

• Position 1: basic position in comb equilibrium
• Position 2: Jacquard selection / stitch / transfer
• Position 3: Needle foot raised - start handing over
• Position 4: needle out of action
• Position 5: start of stitch
• Position 6: Jacquard selection / catch
• Position 7: Needle foot raised - start of catching
• Position 8: stitch
• Position 9: catch
• Position 10: stitch
• Position 11: catch
• Position 12: stitch
• Position 13: catch
• Position 14: stitch
• Position 15: basic position.

4 to 9, a spring shaft needle 32, a lifting plate 33 and a jacquard plate 34 are shown in different working positions, one behind the other, in a needle groove 31 in a needle bed 31. The spring shaft needle 32 has a central needle foot 35 which protrudes continuously from the needle bed 31 and a needle foot 36 at its needle end 37 which can be raised resiliently from the needle bed 32 with the aid of the lifting plate 33. The lifting plate 33 has one Lifting board foot 38. The jacquard board 34 has a front jacquard board foot 39, a middle selection foot 40 and a rear sliding foot 41. 1 and 2, positions 1 and 15 - basic position - of the needle foot 35 projecting constantly from the needle bed 31, the spring-liftable needle foot 36, the lifting board foot 38 and the front jacquard board foot 39 are indicated. The black needle feet are in action and the light needle feet are inactive.

In Fig. 4 spring shaft needle 32, lifting plate 33 and jacquard plate 34 are in position 1 - basic position -. A selection flap 42 on the selection foot 40 is pivoted so that a lock part 43 engages with the sliding foot 41 of the jacquard plate 34 protruding from the needle bed 31 to drive it out.

5, spring shaft needle 32, lifting plate 33 and jacquard plate 34 are in position 2 for jacquard selection / stitching / transferring. The front end of the lifting plate 33 abuts the needle end 37.

In Fig. 6 spring shaft needle 32, lifting plate 33 and jacquard plate 34 are in position 3 - needle foot 36 raised, start transfer -. A lock part 44 lies between the lifting board foot 38 and the front jacquard board foot 39 and presses the lifting board 33 and the jacquard board 34 apart. A lock part 45 engages on the needle foot 35 which protrudes continuously from the needle bed and prevents the spring shaft needle 32 from being driven out via a comb match. The liftable needle foot 36 protrudes from the needle bed 31.

In Fig. 7 spring shaft needle 32, lifting plate 33 and jacquard plate 34 are shown in position 8 - stitch formation.

8 shows spring shaft needle 32, lifting plate 33 and jacquard plate 34 in position 10 - forming stitches. The spring-liftable needle foot 36 is sunk in the needle bed 31 out of work.

In Fig. 9 spring shaft needle 32, lifting plate 33 and jacquard plate 34 are shown in position 12 - forming stitches. Here, the lifting plate 33 engages under the spring shaft needle 32 again, so that its lifting needle foot 36 protrudes out of the needle bed 31 into the working position.

3 and 4, position 1, the needle and sinkers are in the basic position. The spring shaft needle 32, the lifting plate 33 and the jacquard plate 34 are arranged one behind the other in the needle bed 31 on a constant deep needle channel base. If the needle foot 36 is to be brought into the working position, the jacquard plate 34 must be selected and preselected with the lifting plate 33. The selection flap 42 is pivoted away, the jacquard plate 34 remains in its raised or not pushed away position in such a way that the lock part 43 grasps the sliding foot 41 and the jacquard plate 34 and the lifting plate 33 move to the right up to the needle end 37, cf. 3 and 5, position 2.

In the further course, the lock part 44 takes over the task of moving the lifting plate 33 further up and the jacquard plate 34 again, cf. 3 and 6, position 3.

The lock part 45 holds the spring shaft 32 in position on the needle foot 35, so that the lifting plate 33 can slide under the needle foot 36 and bring it into the lock area.

This first selection point - position 2 - is used to select the stitch formation or for the needle drive to pass the stitch.

If stitches are to be transferred, the needle counterbore 23 has been switched to the lower dashed position during the last slide reversal. The needle countersink 23 thus detects the needle foot 36 and pushes the spring shaft needle 32 up until it is detected on the needle foot 35 by a transfer lock part 46.

If a stitch is to be formed, the needle counterbore 23 remains in the same position as the comb, so that the needle foot 36 is first gripped by a lock part 47 and is driven out by it until the needle foot 35 is gripped by an upper needle lifter 48, cf. Fig. 3 and position 8.

During further expulsion, position 10 in FIGS. 3 and 8, the lifting board foot 38 is held by a lock part 49. The needle foot 36 slides down from the lifting plate 33 and disappears in the needle channel, cf. 8, position 10.

During the following downward movement of the spring shaft needle 32 into the thread insertion position, FIGS. 3 and 9, position 12, the lifting plate 33 becomes a lock part 50 held. The needle foot 36 slides onto the lifting plate 33, comes out of the needle channel and is in the working position, cf. Fig. 9, position 12.

The spring shaft needle 32 is now withdrawn from the needle counterbore 24 to a preselected withdrawal depth and by a lock part 51 in the starting position or basic position - position 15 in FIG. brought to comb equilibrium position, in which the needle foot 36 is sunk in the needle channel.

The second selection point for catching or taking over - position 6 in FIG. 3 - brings the needle foot 36 into the working position so that it is gripped by the lock part 49 and the spring shaft needle 32 is driven out by the lock part 49 until the needle foot 35 is in the region of a Lock part 52 comes and is driven out at catch height with the help. The lifting board foot 38 is removed from the lock part 50, cf. Fig. 3, position 11 held. The needle foot 36 slides off the lifting plate 33 and disappears in the needle channel.

In the further course - position 13, FIG. 3 - the lifting plate foot 38 is driven out by a lock part 53, the spring shaft needle 32 is held at the catch height and the needle foot 36 is brought into operation again by the lifting plate 33, so that the spring shaft needle 32 is raised by the needle counterbore 24 the pre-adjusted trigger depth can be deducted.

If both selection points remain unaffected, ie the selection flap 42 does not swivel out, then the jacquard plate 34 is pressed with the rear end into the needle channel and the sliding foot 41 is not removed from the lock part 43 detected. The needle foot 36 is sunk in the needle channel and can therefore not be caught by any lock part. The spring shaft needle 32 remains out of action.

The needle selection for taking over stitches is done in the same way as used for the catch selection.

The needle pass for knitting long and short stitches is shown in Fig. 10. Here the controllable lock parts 16 to 20 are put into operation. At the first selection point - position 2 - those needles that are to knit long stitches are selected, and at the second selection point - position 6 - those needles that are to knit short stitches. The upper needle countersinks 22 form the short and the lower needle countersinks 24 the long stitches.

The passage of the needles and sinkers which are selected at the first selection point - position 2 - is the same as that described for three-way technique stitches in connection with FIG. 3. The passage of the needles and sinkers, which are to form short stitches, begins at the second selection point - position 6. In Fig. 10, position 6, the needle foot 36 raised in action is detected by the lock part 17 and driven out until the needle foot 35 is taken over by the lock part 16. The lock part 48 then brings the spring shaft needle 32 to full stitch. On the way there, position 11, the lifting plate 33 remains stopped by the lock part 50. The needle foot 36 slides off the lifting plate 33 and disappears in the needle channel. Since the lock part 20 has been put into operation, the lifting plate 33 is in the following Starting position subtracted. In the further passage of the lock, the needle foot 36 can no longer be grasped by the lifting plate 33, thus remains inactive and this needle is pulled less far from the upper needle countersink 22 by the needle foot 35, which is constantly in operation. The needle foot 36, which is out of action, cannot be grasped by the needle counterbore 24 and thus slides under it.

11 shows the needle passage for long stitches and short tuck handles. The lock parts 16, 17 and 18 are inactive and the lock parts 19 and 20 are in operation. At position 2 the needle selection for long stitches takes place. The further needle course is the same as already described for the three-way technique, FIG. 3.

The needles that are to form small tuck handles are selected in the tapping selection, FIG. 3, position 6. The course of the needle and sinker is the same as that shown in FIG. 3. However, since the lock part 20 is switched on, the lifting plate 33 is pulled off there, so that a decoupling takes place in position 14 and the needle forming the tuck handles on its foot 36 cannot be grasped by the needle counterbore 24.

Fig. 12 shows the lock system for constant needle withdrawal (Fig. 2) with a needle and sinker pass for three-way technique.

Fig. 13 shows the lock system for constant needle withdrawal (Fig. 2) with a needle and sinker pass for loops.

Reference symbols in the claims serve for better understanding and are not intended to limit the scope of the claims.

Claims (10)

1. Flat knitting machine with spring shaft needles (32) arranged in the needle channels of the needle beds (31), each of which has a front needle foot (35), which always protrudes from the needle bed (31), and a rear one, which disappears in the needle bed (31) due to the spring spring being self-springing have second needle foot (36), with slide plates arranged behind the spring shaft needles (32), each having a working foot and a front end which can be pushed under the spring shaft of the spring shaft needle (32) to selectively lift the second needle foot (36), with rear plates arranged behind the slide plates this slidably displaceable jacquard sinker (34) with at least two feet each, and with a lock system for selecting and actuating the needles and sinkers, which at least two needle countersinks (23, 24) arranged in the lock plane are arranged symmetrically to the central longitudinal axis (M) of the lock system Region of the second needle feet (36),
characterized in that a) the sliding plate is designed as a purely displaceable lifting plate (33) with a lifting plate foot (38) and a stop arranged in front of it, against which the rear needle end (37) of the spring shaft needle (32) can abut when the spring shaft is raised, b) the jacquard plate (34) is formed with a front jacquard plate foot (39), a middle selection foot (40) and a rear sliding foot (41) which can be selectively lowered into the needle bed (31), and c) in the lock system pivotable selection flaps (42) for selective needle selection by cooperation with the selection feet (40) and fixed lock parts (43) for driving out selected jacquard boards (34) by attacking their sliding foot (41) are provided. 2. Flat knitting machine according to claim 1,
characterized in that in the lock system in the region of the first needle feet (35) symmetrical to the central longitudinal axis (M) of the lock system, two further needle countersinks (21, 22) displaceable in the lock plane and one symmetrical to the central longitudinal axis (M), in and out the lock part switchable lock part (16) and in the region of the second needle feet (36) and the lifting board feet (38) four further lock parts (17, 18, 19, 20) switchable into and out of the lock level are provided. 3. Flat knitting machine according to claim 2,
characterized in that the further switchable lock parts (17, 18) in the area of the second needle feet (36) and the further switchable lock parts (19, 20) in the area of the lifting board feet (38) are each arranged symmetrically to the central longitudinal axis (M) of the lock system. 4. Flat knitting machine according to claim 2 or 3,
characterized in that to form long and short stitches the switchable lock part (16) in the area of the first needle feet (35) and the switchable lock parts (17, 18, 19, 20) in the area of the second needle feet (36) and the lifting board feet ( 38) can be switched in action. 5. Flat knitting machine according to claim 2 or 3, characterized in that for forming long stitches and short tuck handles, the switchable lock part (16) in the region of the first needle feet (35) and the switchable lock parts (17, 18) in the region of the second needle feet ( 36) out of action and the switchable lock parts (19, 20) in the area of the lifting board feet (38) are switchable in action. 6. Flat knitting machine according to one of claims 2 to 5,
characterized in that the switchable lock part (16) in the area of the first needle feet (35) and the switchable lock parts (17, 18) in the area of the second needle feet (36) and the switchable lock parts (19, 20) in the area of the lifting board feet (38) can be switched together into and out of the lock level. 7. Flat knitting machine according to one of the preceding claims,
characterized in that a lock part (50) symmetrical to the central longitudinal axis (M) of the lock system is provided for holding the lifting plate (33) on its lifting plate foot (38) against a withdrawal movement on its upper edge of the lock part and against an expulsion movement on its lower edge of the lock part. 8. Flat knitting machine according to one of the preceding claims,
characterized in that two fixed lock parts (44) arranged symmetrically to the central longitudinal axis (M) of the lock system are provided at a first selection point (position 2) for pushing apart the lifting board feet (38) and front jacquard board feet (39). 9. Flat knitting machine according to one of the preceding claims,
characterized in that a fixed lock part symmetrical to the central longitudinal axis (M) of the lock system is provided for driving out the lifting board feet (38) and holding the jacquard board feet (39) against an outward movement at a second selection point (position 6). 10. Flat knitting machine according to one of the preceding claims,
characterized in that the selection feet (40) of successive jacquard sinkers (34) and the associated selection flaps (42) are staggered in the longitudinal direction of the needle channel.

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