JPH0268342A - Drawing apparatus for a lateral knitting machine - Google Patents

Abstract

PURPOSE: To carry out the continuous adjustment of a contactor of each partial roll by a remote operation by connecting a partial roll to a driving shaft through an electromagnetic contactor capable of individually changing a magnetization. CONSTITUTION: A connecting plate 20 is attached to a driving shaft 13 by a fitting pin in a range of each partial roll 11. A ring-shaped body 22 is supported on a bush part 20.1 of the connecting plate 20, a magnet magnetization coil 23 is supported and an electric current is sent through a bridging piece 14 to the magnetization coil 23. A ring-shaped magnet armature 25 is inserted into a ring-shaped channel 24 formed on the connecting plate 20 and a screw 26 is fixed to a fin 27 in the radius direction of the partial roll 11. The armature 25 is connected to the connecting plate 20 by the supply of electricity to the magnetization coil 23 and a torque is transmitted from the driving shaft 13 to the partial roll 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention comprises a knitted drawer roll that is divided into a plurality of coaxial partial rolls, each partial roll being driven separately via an adjustable coupler. The present invention relates to a drawer device for a flat knitting machine that is possible.

[Conventional technology]

Such a withdrawal device is disclosed in German Patent No. 321 of the Federal Republic of Germany.
No. 7395 proposes an adjustable mechanical connection of the individual partial rolls of the print drawer roll co-acting with the opposing pressure rolls and a common drive shaft by means of a star-shaped cam, ?
This is done via an A-articulate spring and a wrap-around spring located in the partial roll.

[The problem to be solved by the invention The problem on which the invention is based is that the stepless adjustment of the couplings of the individual partial rolls is carried out by remote control, and that the couplings ensure an unalterable effect with any adjustment. This is how the drawer device is constructed.

[Means to solve the problem]

In order to solve this problem, according to the invention, in a drawing device of the first type mentioned, the partial rolls are freely rotatably supported on a common concentric drive shaft, and the partial rolls and the drive shaft are connected to each other. The coupling takes place via S-magnetic couplers with individually variable excitation.

〔Effect of the invention〕

The electromagnetic coupler allows for remotely controlled adjustment of the coupler by simply varying the supplied current by any control or regulating device. The entire pull-out device is constructed from ma movable rotating pairs of S-sections with precise dimensions in a space-saving and robust manner on a common concentric drive shaft. In the circumferential gap between adjacent partial rolls, a fixed m-crossing piece for guiding the helmet and conductor is inserted, respectively, and also serves to support the parts of the electromagnetic coupler which are held against relative rotation.

In contrast to the unstable motor-driven rotating field couplers known from EP 261 049, the pull-out device constructed according to the invention provides a Precise adjustment of torque
This is possible with an electromagnetic coupler.

The electromagnetic coupler of the withdrawal device must meet the required torque value and/or
Alternatively, various configurations can be made according to spatial conditions.

〔Example〕

A plurality of embodiments of a drawer device constructed according to the present invention are as follows:
The attached drawings will be explained below.

FIG. 1 shows a knitting fabric drawer roll lO divided into a plurality of coaxial partial rolls 11 in a drawer device for a flat knitting machine.
These partial rolls 11 are arranged side by side with a circumference of 1iA.
It is provided on a concentric drive shaft 13 with an I gap 12 formed therein. A bridging piece 14 in each case enters into the circumferential gap 12 between the individual partial rolls II, and the end areas of all the bridging pieces 14 extend parallel to the dust removal roll IO at a distance from a common support rod. It is attached to 15. As can be seen from FIG. 2, which shows the end face of the drawing device, the partial roll 11 of the print drawing roll 10 is connected to the opposing pressure roll 17.
one knitted strip 16 produced on a flat knitting machine in cooperation with
Alternatively, a plurality of knitted fabric bands 16 formed side by side are guided through a part of the periphery of the partial roll 11 and between the partial roll 11 and the opposing pressure roll 17 .

3 to 6 show cross-sections through the axes of two adjacent partial rolls 11, the electromagnetic couplings provided in the partial rolls have different configurations, and the electromagnetic couplings connect the partial rolls 11 and the drive shaft 13. An adjustable entrainment connection is provided.

In the embodiment according to FIG.
A connecting plate 20 is attached to the drive shaft 13 by a pin 21 on top. An annular body 22 as an excitation winding carrier is supported on the bushing part 20.1 of the coupling plate 20 and holds an electromagnetic excitation winding 23. This annular body 22 is connected to a bridging piece 14 which extends through the circumferential gap 12 between the two partial rolls 11 and is thereby kept stationary. The excitation winding 23 is connected via the m-transfer piece 14.
Power is supplied to the

A concentric annular groove 24 is formed in the connecting plate 20 that is fixedly coupled to the drive shaft 13 , and an annular magnet armature 25 is inserted into this annular groove, and a boss 28 connects the drive shaft 13 .
It is attached by screws 26 to the radial fins 27 of the partial roll 11, which is freely rotatably supported thereon.

The drive shaft 13 of the drawer device is driven by an electric motor (not shown).
It is driven at a rotational speed of such a magnitude as to be able to give a maximum drawing speed for regular drawing of the knitted fabric. If the excitation winding 23 has a π-free flow, the partial rolls 11 can rotate freely on the drive shaft 13 and do not exert any pulling force on the knitted fabric strip 16 guided via these partial rolls 11 .

When the electromagnet is excited by supplying power to the excitation winding 23, the armature 25, which is fixedly coupled to the partial roll 11,
connected to a coupling plate 20 which is fixedly connected to the drive shaft 13 and thus from a common drive shaft 13 to the partial rolls 11;
A torque is transmitted that is related to the strength of the current supplied to the excitation winding 1M23. If the reaction torque exerted by the knitted web 16 on the partial roll 11 becomes greater than the torque that can be transmitted by the electromagnetic coupler, the partial roll II begins to slip relative to the coupling plate 20. Since the electromagnetic coupler operates by frictional coupling only, the electromagnetic coupler is virtually wear-free. The torque generated in the annular body 22 during connection is received by the bridging piece 14 and transmitted to the support rod 15.

In the embodiment according to FIG. 4, an excitation winding (not shown) is housed in a coupling plate 20' which is fixedly connected to the drive shaft 13. The power is supplied through a conductor ring 2 formed around the connecting plate 20'.
9, these conductor rings 29 cooperate with sliding contacts provided on a fixed ring 30, which is connected to the bridging piece 14 and also serves as a dust-proof protective ring for the conductor rings. In other respects the structure of the electromagnetic coupler is the same as in FIG. 3 and is numbered the same.

In the embodiment according to FIG. 5, the excitation winding (not shown) is again housed in a coupling plate 20' which is fixedly connected to the drive shaft 13, and which, as in the embodiment according to FIG. Power is supplied via the moving ring. The armature is connected to the connecting plate 20'
It consists of an annular plate 31 which can be suctioned towards the end face 20.2 and which can be configured as a friction ring or have a friction coating. A driving pin 32 fixed on the annular plate-shaped armature 31 and extending in the axial direction enters a mating recess in the radial fin 27 of the partial roll 11 and thus connects the armature 31 to the partial roll 11 in a rotation-proof manner. However, it allows axial movement of the armature 31. In the partial roll 11 shown on the right in FIG.
7' and enters the fitting through hole of the annular plate-shaped armature 3I, allowing the armature 31 to perform axial movement on the entrainment pin.

When the electromagnetic coupler is energized, the armature 31 and the coupling plate 20'
A frictional connection takes place, and a torque, which is dependent on the strength of the supplied current, is transmitted from the drive shaft 13 to the partial roll II.

FIG. 6 shows an embodiment of an electromagnetic coupler for transmitting relatively large torques. The excitation windings are housed in an annular body 22 which, like the embodiment according to FIG.
The bushing part 20.1 of the coupling plate 20 is fixedly connected to
It is fitted on top with a sliding fit. The armature is a brake ring 33
It has the shape of , is freely rotatably and axially movably supported on the bushing part 20.1 of the coupling plate 20 and rests against the end face of the annular body 22 holding the excitation winding. Brake ring 33
The armature configured as furthermore has a ring gear 34 in the same axial position as the internal ring gear 35 of the partial roll 11 . At least one pinion 36 is freely rotatably supported in the coupling plate 20 on an axial pin 37 and meshes simultaneously with both ring gears 34 and 35.

If the electromagnetic coupler is not energized, the partial roll 11 is fixed and the pinion 36 is connected to the internal ring gear 35 of the partial roll 11.
, thereby rotating the armature, which is configured as a brake ring 33, via its annular gear 34. Due to the power supply of the electromagnetic coupling, the armature, which is designed as a brake ring 33, is attracted and braked towards the ring 22 which is held stationary and preferably has a friction coating on the end face 22.1. The stronger the braking action, the stronger the pinion 3 in the brake ring 33.
6 is strongly supported, and a correspondingly greater torque is transmitted from the drive shaft 13 to the partial roll 11. Fixed annular body 22
The support takes place via the bridging piece 14 as already described above.

Due to the torque reduction between both ring gears 34 and 35,
Instead of the at least one simple pinion, a pinion gearing can also be provided.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a knitted fabric draw-out roll composed of a plurality of partial rolls of a draw-out device of a horizontal A machine, and Fig. 2 is a view of this draw-out device viewed in the direction of arrow B]11 in Fig. 1; 3 is a longitudinal sectional view of two contacting partial rolls with a first embodiment of an electromagnetic coupler, FIG. 4 is a view corresponding to FIG. 3 of a partial roll with a second embodiment of an electromagnetic coupler, FIG. 5 is a view corresponding to FIG. 3 of a partial roll with a third embodiment of an electromagnetic coupler;
FIG. 6 is a view corresponding to FIG. 3 of a partial roll with a fourth illustration of an electromagnetic coupler. 11... Partial roll, 13... Drive shaft, 20.22
゜23, 25...Electromagnetic coupler. (+3)

Claims (1)

Claims: 1. A knitting drawer roll which is divided into a plurality of coaxial partial rolls, each partial roll being able to be driven separately via an adjustable coupler, in which the partial roll (1
1) are freely rotatably supported on a common concentric drive shaft (13), these partial rolls (11) and the drive shaft (1
3) A drawer device for a flat knitting machine, characterized in that the connection with the device is performed via an electromagnetic coupler whose excitation can be individually changed. 2 To the circumferential gap between adjacent partial rolls (11),
characterized in that fixed bridging pieces (14) for guiding the power supply conductors are respectively inserted therein;
A drawer device according to claim 1. 3. Draw-out device according to claim 2, characterized in that the fixed bridging piece (14) is fixedly connected to a device part (22) which is provided in the partial roll (11) in a manner that prevents relative rotation. . 4 Device parts installed to prevent relative rotation (22)
4. The draw-out device according to claim 3, characterized in that the excitation winding carrier is designed as an excitation winding carrier. 5. In each partial roll (11) there is provided a connecting plate (20, 20') mounted on the drive shaft (13), with an axially movable armature which can be excited by an excitation winding (23). 5. The withdrawal device according to claim 1, characterized in that it has a recess or contact surface (20.2) for (31, 33). 6 The armature (31, 33) corresponds to the partial roll (11
6. The drawer device according to claim 5, characterized in that the drawer device is fitted into and connected to the drawer device. 7. Claims 5 and 6 characterized in that the recess of the coupling plate (20) consists of a concentric annular groove (24) into which a rotationally symmetrical armature (25) is inserted. drawer device. 8 The armature (31, 33) has a friction coating which is attached to the contact surface (20) of the coupling plate (20') mounted on the drive shaft or of the excitation winding carrier (22) held fixedly.
．． 2, 22.1),
A drawer device according to one of claims 1 to 6. 9 The excitation winding (23) is provided on a connecting plate (20') that is fixedly connected to the drive shaft, and the power is supplied through a sliding ring (29) provided on the circumferential surface of the connecting plate (20'). Claims 1 to 3, characterized in that these sliding rings are in contact with sliding contacts provided on a bridging piece (14) that enters the circumferential gap between the two partial rolls (11). 1 of 8
The withdrawal device described in . 10 The electromagnetic coupler has an armature plate (33) which is freely rotatable when the electromagnet is not energized, and a coupling plate (34) mounted on the drive shaft (13) is connected to the annular gear (34) on this armature plate. 20) at least one pinion (36) supported on the
10. The withdrawal device according to claim 1, characterized in that it meshes indirectly with an internal ring gear (35) of the partial roll (11) via a pinion of the partial roll (11).