JPH0340139B2 - - Google Patents

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. It is possible,
The present invention relates to a drawer device for a flat knitting machine.

[Conventional technology]

Such a drawing device is proposed in German Patent No. 32 17 395, in which an adjustable mechanical connection of the individual partial rolls of a knitted drawing roll co-acting with a counterpressing roll to a common drive shaft is proposed. , via a star cam, an adjustable spring and a wrap spring located in the partial roll.

[Problem to be solved by the invention]

The problem underlying the invention is to configure the draw-out device in such a way that the stepless adjustment of the couplings of the individual partial rolls takes place by remote control, and that the couplings ensure an unchanged effect with any adjustment. It is.

[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 supported in a freely rotatable manner on a common concentric drive shaft, and the partial rolls are supported in a freely rotatable manner on a common concentric drive shaft. The connection is
This is done via electromagnetic couplings 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 drawing device is composed of rotationally symmetrical parts that can be manufactured space-savingly and robustly in a variety of ways and with precise dimensions on a common concentric drive shaft. A fixed bridging piece for guiding the feed conductor is inserted between the circumferential gaps between adjacent partial rolls,
It also serves to support the parts of the electromagnetic coupler that are held against relative rotation.

In contrast to the unstable electric rotary field couplers known from EP 261 049, the draw-out device constructed according to the invention provides a Precise adjustment of the torque is made possible by the electromagnetic coupler.

The electromagnetic coupling of the withdrawal device can be configured in various ways depending on the required torque values and/or spatial conditions.

〔Example〕

Several embodiments of a drawer device constructed in accordance with the invention are described below with reference to the accompanying drawings, in which: FIG.

FIG. 1 shows a knitted fabric drawer roll 10 that is divided into a plurality of coaxial partial rolls 11 in a drawer device for a flat knitting machine, and these partial rolls 11
are arranged side by side to form a circumferential gap 12 and are provided on a concentric drive shaft 13. individual portion roll 1
In each case, a bridging piece 14 enters into the circumferential gap 12 between the knitting rolls 10, and the end regions of all the bridging pieces 14 are attached to a common support rod 15 which extends parallel to the knitting drawer roll 10 at a distance. . As can be seen from Figure 2, which looks at the end of the drawer,
The partial rolls 11 of the knitted drawer rolls 10 cooperate with counterpressing rolls 17 such that a knitted strip 16 or a plurality of knitted strips 16 formed side by side produced on a flat knitting machine are controlled by the partial rolls 11. The partial roll 11 and the opposing pressure roll 17 are connected through a part of the periphery.
be guided through the

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. 3, a connecting plate 20 is mounted on a common drive shaft 13 in the range of each partial roll 11, which is arranged concentrically with respect to the drive shaft 13, by means of mounting pins 21 fixed to the drive shaft 13. It is being 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 enters through the circumferential gap 12 between the two partial rolls 11 and is thereby kept stationary. Power is supplied to the excitation winding 23 via the bridging piece 14.

A concentric annular groove 24 is formed in the connecting plate 20 that is fixedly connected to the drive shaft 13, and an annular electromagnetic armature 25 is inserted into this annular groove to connect the boss 2.
It is attached by screws 26 to the radial fin 27 of the part 11 which is freely rotatably supported on the drive shaft 13 by 8.

The drive shaft 13 of the drawing device is driven by an electric motor (not shown) at a rotational speed of such a magnitude as to provide a maximum drawing speed for regular drawing of the knitted fabric. If the excitation winding 23 is current-free, the partial rolls 11 can rotate freely on the drive shaft 13 and exert no pulling force on the knitted web 16 guided via these partial rolls 11 . Excitation winding 2
When the electromagnet is excited by supplying power to 3, the armature 25 fixedly connected to the partial roll 11
is connected to a coupling plate 20 which is fixedly engaged with the drive shaft 13, so that a torque which is dependent on the strength of the current supplied from the common drive 13 to the partial rolls 11 to the excitation winding 23 is communicated. Knitted belt 16
The reaction torque exerted on the partial roll 11 from
If the torque becomes greater than that which can be transmitted by the electromagnetic coupling, the partial rolls 11 begin 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 fixedly connected to the drive shaft 13 by a connecting plate 20'.
is housed within. The power supply is carried out via conductor rings 29 formed around the connecting plate 20', and these conductor rings 29 are attached to a fixed ring 30 which is connected to the bridging piece 14 and also serves as a dust-proof protective ring for the conductor ring. It works in conjunction with sliding contacts. In other respects the structure of the electromagnetic coupler is the same as in FIG. 3 and is labeled with the same reference numerals.

In the embodiment according to FIG. 5, the excitation winding (not shown) is again fixedly connected to the drive shaft 13 by a coupling plate 2
0', and this coupling plate is electrically supplied via a sliding ring as in the embodiment according to FIG. The armature consists of an annular plate 31 which can be drawn towards the end face 20.2 of the coupling plate 20' and which can be configured as a friction ring or can 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 prevents rotation of the armature 31 relative to the partial roll 11. coupling, but allowing axial movement of the armature 31. In the partial roll 11 shown on the right in FIG. 5, the driving pin 32' is fixed to the radial fin 27' and enters the fitting through hole of the annular plate-shaped armature 31, so that the armature 31 is moved in the axial direction on the driving pin. Can move.

When the electromagnetic coupler is energized, a frictional connection between the armature 31 and the coupling plate 20' 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 11.

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. It is provided with a sliding fit on the bushing part 20.1 of the coupling plate 20. The armature has the form of a brake ring 33 and is supported in a freely rotatable and axially movable manner 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. . The armature, which is configured as a brake ring 33 , 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 supported in the coupling plate 20 in a freely rotatable manner on an axial pin 37 and meshes with both ring gears 34 and 35 simultaneously.

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

For torque reduction between the two 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]

Figure 1 is a plan view of a knitted fabric pull-out roll made up of partial rolls of a pull-out device of a flat knitting machine, Figure 2 is a view of this pull-out device as seen in the direction of the arrow in Figure 1, and Figure 3 is an electromagnetic connection. 4 is a view corresponding to FIG. 3 of a partial roll with a second embodiment of an electromagnetic coupling; FIG. FIG. 6 corresponds to FIG. 3 of a partial roll with a third embodiment of the device, and FIG.
FIG. 11... partial roll, 13... drive shaft, 20,
22, 23, 25... Electromagnetic coupler.

Claims (1)

[Claims] 1. A knitting drawer roll divided into a plurality of coaxial partial rolls, each of which can be driven separately via an adjustable coupler, in which the partial roll 11 is common. The partial rolls 11 are freely rotatably supported on a concentric drive shaft 13, and the partial rolls 11 and the drive shaft 13 are connected via electromagnetic couplers whose excitation can be individually varied. , drawer device for flat knitting machines. 2. Fixed bridging pieces (14) for guiding the feed conductor are each inserted into the circumferential gap between adjacent partial rolls (11).
The withdrawal device described in . 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 arranged in the partial roll (11) in a manner that prevents relative rotation. 4 Device part 2 provided so as not to rotate relative to each other
4. The draw-out device according to claim 3, characterized in that 2 is designed as an excitation winding carrier. 5. In each partial roll 11 there is provided a coupling plate 20, 20' mounted on the drive shaft 13 and provided with a recess or a Claims 1 to 4 characterized in that it has a contact surface 20.2.
The withdrawal device according to one of the above. 6 Partial roll 11 to which armatures 31 and 33 correspond
6. A drawer device as claimed in claim 5, characterized in that it has a fitted connection. 7. Pull-out device according to claims 5 and 6, characterized in that the recess in the coupling plate (20) consists of a concentric annular groove (24) into which a rotationally symmetrical armature (25) is inserted. 8 The armatures 31, 33 have a friction coating which contacts the contact surfaces 20.2, 22.1 of the coupling plate 20' mounted on the drive shaft or of the excitation winding carrier 22 held fixedly. 7. A drawer device according to claim 1, characterized in that it is removable. 9 The excitation winding 23 is provided on a connecting plate 20' that is fixedly coupled to the drive shaft, and power is supplied through sliding rings 29 provided on the circumferential surface of the connecting plate 20'. 9. The pull-out device according to claim 1, wherein the pull-out device is in contact with a sliding contact provided on a bridging piece (14) which extends into the circumferential gap between two partial rolls (11). 10 The electromagnetic coupler has an armature plate 33 which is freely rotatable in the non-energized state of the electromagnet, and an annular gear 34 on this armature plate has at least one plate supported on the coupling plate 20 mounted on the drive shaft 13. 1
10. Claims 1 to 9, characterized in that two pinions (36) mesh and mesh directly or indirectly via a second pinion of the gearing with the internal ring gear (35) of the partial roll (11). Drawer device.