GB1574516A

GB1574516A - Circular knitting machine

Info

Publication number: GB1574516A
Application number: GB4885177A
Authority: GB
Original assignee: Terrot Strickmaschinen GmbH
Current assignee: Terrot Strickmaschinen GmbH
Priority date: 1976-11-27
Filing date: 1977-11-23
Publication date: 1980-09-10
Also published as: FR2372260A1; DE2654005A1; JPS5370149A; JPS6242063B2; IT1087912B; ES464512A1; DE2654005C3; FR2372260B1; DE2654005B2

Description

(54) CIRCULAR KNITTING MACHINE (71) We, TERROT STRICKMASCHINEN G.M.B.H., a German Body Corporate, of Dürrheimer Strasse 12, 7000 Stuttgart 50, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to circular knitting machines of the type comprising a row of knitting cams supported on carrier segments, wherein the carrier segments hold at least two knitting cam systems arranged consecutively in the direction of rotation in an adjustable state for adjustment of the depth to which the needles are lowered.

Knitting machines are known wherein the carrier segments carying the cylinder cam systems carry the cam systems of two knitting systems arranged consecutively in the direction of rotation (German laid open patent application, No. 2,364A84; Figures 1 and 2).

Furthermore, these carrier segments comprise, in each of two superposed planes, two respective knitting cam systems arranged consecutively in the direction of rotation.

This doublink of the knitting system is, however, irrelevant in the following consideration of this prior art.

In this known art the cam system channel, or cam track, of the knitting systems, or cams, arranged consecutively in the direction of rotation is constituted by two cam system parts forming, for example, one knitting cam track and one lowering cam track, respectively, said cam system parts being secured to a common carrier plate.

These cam system devices which are associated with one another in pairs and each consist of two cam system parts and one carrier plate each sit on one respective slide, and these slides are mounted on the carrier segment such that they can be displaced and secured by adjustment screws in order to set the depth to which the needles are lowered.

Thus, construction of these cam system devices involves great expenditure, since mounting them accurately on the slides and the necessity for the slide arrangement as such on the carrier segment results in high manufacturing costs. Furthermore, the cam system parts limiting the cam system channel do not enable provision of a closed channel, so that the needle butts cannot be guided reliably at a number of places along the cam system channel, which renders uncontrolled lengthwise movement of the needles possible at several points in the knitting systems.

The object of the present invention is that of simplifying in circular knitting machines of the first above-mentioned type, the construction of the cylinder cam systems and/ or that of the diaL cam systems and their adjustability so as to set the depth to which the needles are lowered, and also that of enabling the needle butts to be guided in their cam system channel in such a way that the problem of uncontrolled lengthwise movements is mitigated.

This object is attained by the provision of a circular knitting machine comprising at least one row of knitting cams supported on carrier segments, each carrier segment supporting cam plate with a cam track disposed therein, the cam track constituting two knitting cam systems, an active knitting cam system and a non-active knitting cam system and being laterally closed along its length, wherein each cam plate is adapted to be swivelled about an axis extending perpendicularly to the plane of the cam plate and located within the region of its nonactive knitting cam system such that the depth to which the needles are retracted mav be adjusted.

The combination of two knitting cam systems, arranged consecutively in the direction of rotation on one cam plate, or cam system plate, necessarily produces a cam track, or cam system channel, which extends over two knitting systems and guides the needle butts positively and therefore reliably. Furthermore, both knitting systems are located on only one structural component. This enables much more rationalised manufacture and stockkeeping of only one type of cam system plate. Moreover, the fact that the cam system plates are adapted to be swivelled eliminates the necessity for expensive slide arrangements for adjusting the depth to which the needles are lowered.

The arrangement of the swivel axis within the knitting system constituting a nonknitting cam track, or non-active knitting cam system has the advantage that only a relatively small angle of swivel movement is required to obtain a desired adjustment of the depth to which the needles are lowered. Furthermore, when the cam system plate is swivelled, the highest point on the knitting cam track to which the needles can be raised is displaced in the lengthwise direction of the needles by a distance which is approximately only half that of the path of the lower end of the lowering cam track, which is necessarily displaced simultaneously.This means that upon adjustment of the lower end of the lowering cam track in order to alter the length of the loops the maximum distance the needles are raised is only altered to an extent which does not have a disadvantageous effect on the formation of the loops.

There is known from German Patent 1,099,120, a circular knitting machine wherein the cam system plates of its cylinder cam systems and dial cam systems are mounted by a securing bolt on the carrier segments such as to swivel in order to adjust the depth to which the needles are lowered.

The ends of these cam system plates are connected to one another in an articulated manner.

In this known construction the cam system plates do, however, include only one knitting system wherein the needles are raised to the highest position and subsequently lowered again to the lower end of the lowering cam track. Thus, this prior art does not disclose the combination of two knitting systems on an integral cam system plate.

In the inventive construction the closed cam system channel can be formed by correspondingly arranging a pair of plates on the cam system plate such that the pair of plates limits the cam system channel laterally. However, it is preferable to construct the cam system plate as an integral part and dispose the cam system channel therein.

It is immaterial whether the swivel axis of the cam system plate or the knitting system constituting the non-knitting cam track, respectively, is located at the beginning or at the end of the cam system channel disposed in the cam system plate.

In any case, it is expedient, in the event that the cam system channel constitutes a knitting cam track and a non-knitting cam track, that the section of the cam system channel constituting the latter has a funnelshaped extension at the end facing the adjacent knitting system, for this ensures in a simple manner that in spite of the displacement of the inlet or outlet end of the channel, which is effected by the swivel movement of the cam system plate, the needle butts cannot hit edges of the adjacent cam system plate and thereby become damaged or broken. In this connection it is important that the funnel-shaped extension of the non-knitting cam track is located in an area in which there is no movement of the needles in their lengthwise direction, so that precise lengthwise guidance of the needle butts is not required here.

In a preferred embodiment of the invention the swivel axis is located within the region of the funnel-shaped extension of the section of the cam system channel refining the non-knitting cam track and extends approximately through the centre line of the cam system channel.

The invention is par.ticularly advantageous in the case of interlock circular knitting machines, because two cam system plates, at least one of which comprises a non-knitting cam track and a knitting cam track, can be mounted on each carrier segment in the lengthwise direction of the needles above or behind each other, respectively. The two cam system plates should be offset in the direction of rotation by a distance corresponding to the width of one knitting system. In this case, the invention, particularly the last mentioned measure, enables manufacture of only one type of cam system plate for the cylinder cam systems, which, in turn, enables both rationalized manufacture and stockkeeping.

It is expedient to mount the sections of the carrier segments carrying one respective cam system plate such that they are offset in the lateral direction in accordance with the arrangement of the two cam system plates, which are offset in the direction of rotation, which results in a step-like arrangement of the carrier segments and thus the posibility of a particularly advantageous mutual coordination.

In a further development of the invention, which is not limited to interlock circular knitting machines, the cam system plates are adapted to be swivelled by adjustment devices which are mounted behind one another in the direction of rotation on the carrier segment and each comprise a turnable member, so that a corresponding change in the depth to which the needles are lowered can be effected quickly and easily on all carrier segments without having to interfere with the cylinder cam systems or dial cam systems, respectively.

An expedient construction of the cylinder cam systems is obtained when the turnable members are mounted on the side of the carrier segment facing away from the cam system plates and behind the respective cam system plate which is to be swivelled, parallel to the swivel axis thereof, whilst in the case of the dial cam systems it is advantageous for the turnable members to be disposed on the oupter peripheral surface of the carrier composed of the individual carrier segments and carrying the dial cam systems.

The adjustment devices can be constructed in various ways. Possible advantageous constructions form the subject matter of patent claims 8 to 11.

The necessity for a separate oil supply to the cam system channels of the cylinder cam systems and dial cam systems is eliminated if the swivel axis of the cam system plates is constituted by a hollow bolt which is adapted to be connected to an oil supply line.

Further features and details of the invention are to be found in the following detailed description of embodiments of cylinder cam systems and dial cam systems illustrated in the accompanying drawings.

In the drawings: Figure 1 is a view of a carrier segment of the carrier of the cylinder cam systems of an interlock circular knitting machine according to one embodiment of the invention, taken from the side on which the cam system plates are secured.

Figure 2 is a partly sectional view of the carrier segment shown in Figure 1, taken from the side opposite the cam system plates.

Figure 3 is a longitudinal sectional view of the carrier segment along the line 3-3 in Figure 1.

Figure 4 is a view similar to Figure 1 of a carrier segment of the carrier of the dial cam systems of the interlock circular knitting machine, taken from the underside of the carrier segment with a view of the cam system plates.

Figure 5 is a cross-sectional view of the carrier segment shown in Figure 4, taken along the line 5-5 in Figure 4.

Figure 6 is a view of the carrier segment corresponding to the illustration in Figure 4, but with the cam system plates removed.

Figure 7 is a longitudinal sectional view of the carrier segment shown in Figures 4 and 6, respectively, taken along the line 7-7 in Figure 6: and Figure 8 is a partly sectional view of the carrier segment taken in the direction of the arrow A shown in Figure 6.

The carrier segment of the carrier of the cylinder cam systems of an interlock machine shown in Figures 1 to 3 is designated generally by the reference numeral 10.

Further carrier segments are connected thereto, as indicated by the dot-and-dash lines, in order to form a cylinder cam system casing. The carrier segments are removably secured to a base plate which is not illustrated in detail. As is common in interlock machines, two respective cam system plates 20, 22 are arranged above each other and offset by a distance corresponding to the width of one knitting system on the carrier segments. Each of these cam system plates constitutes a double system constituting of a non-knitting system I and a complete knitting system II. Both cam system plates each have a cam system channel 24 which is closed along its entire length.This cam system channel ensures that the butts of the needles to be controlled are guided positively over the entire area of the two adjacent knitting systems I and II and thus prevented from effecting uncontrolled movements in the lengthwise direction of the needles.

In this embodiment the cam system plates 20, 22 each consist of a single integral body in which the cam system channel 24 is suitably disposed. This inventive measure provides interlock machines with the important advantage that identically designed cam system plates can be used for both needle tracks in the cylinder cam system, provided that the cam system plates are offset in the direction of rotation by a distance corresponding to the width of one knitting system, as has been mentioned above and is clearly shown in Figure 1.

As is apparent from this Figure, the sec-tion of the cam system channel 24 constituting a non-knitting cam track 14 of the non-knitting system I comprises a funnelshaped extension 26 at the end facing the adjacent knitting system II, and the channel section 28 of an adjacent lowering cam track 17 of the knitting system II issuing in the non-knitting cam track runs into this extension of the channel section.

For adjustment of a lower end 18 of the lowering cam track 17 adjacent the knitting cam track 16 of knitting system II in order to alter the depth to which the needles are lowered, the cam system plates are adapted to be swivelled about a swivel axis 30 disposed perpendicularly relative to said cam system plates. This swivel axis is located in the non-knitting system I, more particularly, within the region of the funnel-shaped channel extension 26, in such a manner that it extends approximately through the centre line of the cam system channel 24. Furthermore, the swivel axis is constituted by a cylindrical bolt disposed on the carrier segment, said bolt comprising a threaded section 32 at the end protruding from the carrier segment and receiving the cam system plate 20, 22, respectively. The threaded section is adapted to be screwed into a threaded member in the cam system plate.Furthermore, the swivel axis on the cam system plate protrudes with its cylindrical end shaft section 34 from the carrier segment and engages a corresponding cylindrical recess 36 in the cam system plate in order to centre said cam system plate. Disc springs 38 which are supported on the carrier segment and at a head 40 of the cylindrical bolt, respectively, produce the effect that the cam system plate 20, 22, respectively, is held on the carrier segment.

From Figure 1 it is apparent that the arrangement of the swivel axis 30 with respect to the highest point on the knitting cam track 16 is at a distance a, which is substantially smaller than the distance b of the lower end 18 of the lowering cam track 17 from the swivel axis 30. This results in the advantage that upon adjustment of the lower end 18, the highest point on the knitting cam track 16 to which the needles can be raised is only adjusted by a fraction of the path of the lower end 18, in which case the relationship a to b is selected such that the adjustment of the lower end 18 does not entail a disadvantageous change in the maximum distance to which the needles can be raised.

The funnel-shaped extension 26 of the non-knitting cam track 14 of the cam system plates ensures that in spite of the displacement of the inlet or outlet end of the cam system channel effected by the swivel movement upon adjustment of the lower end of the lowering cam track, the needle butts cannot hit edges of the following cam system plate. The illustrated embodiment comprising the funnel-shaped extension 26 at the entrance to the non-knitting cam track 14 has the further advantage that the inlet funnel is located in a region where there are no needle movements in the lengthwise direction of the needles, so that exact lengthwise guidance of the needles is not required here.

To adjust the depth to which the needles are lowered, or to swivel the cam system plates 20, 22 for the latter purpose, an adjustment device designated generally by the reference numeral 42 is associated with each cam system plate on the carrier segment. The adjustment device is disposed in the segment section 44 or 46 on which the respective cam system plate 20, 22, is also held. The segment sections 44, 46 of the carrier segments receiving the cam system plates and adjustment devices are offset in the lateral direction in accordance with the arrangement of the two cam system plates 20, 22, which are offset in the direction of rotation. Thus, the carrier segments are of step-like configuration and in the assembled state engage one another positively in order to form the cylinder cam system carrier, as is indicated in Figure 1.

In the embodiment shown in Figures 1 to 3, in which the carrier segments are constructed as described above, the adjustment devices 42 are arranged both above one another and, when viewed in the directon of rotation of the consecutive non-knitting and knitting systems I, II, behind one another. For adjustment of the cam system plates these adjustment devices each com prise a turnable member 48 which is accessible from the rear side of the carrier seg- ments and is mounted so as to be rotatable, but axially non-displaceable in the corresponding segment section 44, 46, respectively, parallel to the swivel axis 30 of the cam system plates. This turnable member comprises a cylindrical bearing shaft 50 having a helical pinion 52 on its front shaft end which is located within the carrier segment.

This pinion engages a corresponding pinion 54 of an adjustment member 56 mounted for rotation in the respective segment section and axially displaceable in a vertical direction relative to the bearing shaft 50 of the turnable member 48 or to the swivel axis 30 of the cam system plates, respectively, such that its axial displacement is effected in approximately the direction of the path of adjustment of the lower end of the lowering cam track of the respective cam system plate. The adjustment member comprises a threaded shaft 58 which is an integral part of the pinion 54 and is guided in a corresponding internal thread of the segment section receiving the adjustment member. Accordingly, upon rotation of the turnable member 48, the adjustment member will necessarily be axially adjusted by rotation of the pinion 54. The transmission ratio between the two pinions 52, 54 is selected such that the swivelling of the cam system plate effected by the axial adjustment of the adjustment member 56 corresponds to a value which is proportional to the indication on the scale 70 of the turnable member 48.

A stop bolt 60 is secured on the cam system plate to be adjusted. with its axis parallel to the swivel axis 30 thereof. Penetrating a bore 62, the stop bolt extends into a guide bore 64 receiving the pinion 54 of the adjustment member 56 such that it is located in front of the helical pinion 54 of the adjustment member. In the guide bore be tween the stop bolt 60 and the helical pinion 54~ there is a laterally guided support plate 66 which abuts the pinion 54 and is - con stantly kept in contact with the stop bolt 60 by pressure exerted by a-compression spring 6O. The spring 68 acts on the bolt 60 which moves laterally in bore 62 and is hence maintained in contact with the plate 66.

Thus, this compression spring 68 ensures that the cam system plate 20, 22, respectively, is constantly maintained in a position determined by the adjustment member 56 and corresponding to the desired depth to which the needles are lowered. An indication mark 72 on the respective segment section 44, 46 is associated with a scale disc 70 mounted on the turnable member. Thus, this scale disc enbles an exact correspond ing swivelling of the cam system plates to set the depth to which the needles are to be lowered.

As is clearly apparent from Figures 1 and 2, the diameter of the bores 62 which are penetrated by the stop bolts 60 of the cam system plates is larger than'the diameter of the stop bolts. The difference in the diameters corresponds to the maximum pos sible path of adjustment of the lower end 18, so that no special stop members are re quired to limit the path of swivel move ment of the cam system plates.

The design of the carrier segment shown in Figures 4 to 8 for receiving the dial cam system plates corresponds substantially to that of the carrier segment for the cylinder cam systems. For- this reason, substantially corresponding structural parts have been given the same reference characters as in Figures 1 to 3, only increased by 100. This is also applicable to the cam system plates and their arrangement and design.

The structural difference in this carrier segment for forming the dial cam system carrier consists in the main only in the design of the adjustment devices serving to swivel the cam system plates. In accordance with the explanation above, these adjustment devices are designated generally by 142. They are mounted on the carrier segment so as to be accesible from an outer surface 143 constituting a section of the peripheral surface of the dial cam system carrier.As adjustment member these ad- adjustment devices each comprise an adjust ment slide 182 which is adapted for longitudinal displacement and slight swivel movement in a receiving groove 180 on the flat side of the carrier segment carrying the cam system plates and the adjustment slide for the cam system plate 122 which is in the rear, when the carrier segment is viewed in a horizontal position, extends into the segment section 146. The slides comprise at the end facing the surface 143 of the carrier segment a head 188 having convex lateral surfaces 184, 186, both slides being laterally guided by only the convex lateral surfaces of. this head in - the receiving gro.ove - and- therefore being held in a slightly. swivelable state in the latter.One respective adjust ment screw 190 mounted for rotation on the.

carrier - segment and accessible from the front side 143serves to longitudinally adjust the adjustment slides 182. This adjustment screw comprises on its circumference a cylindrical guide shaft 194 guided in a guide bore 192 of the carrier segment. The guide shaft has a peripheral groove 196 in which an entrainment means 198 is disposed, said entrainment means carrying an entrainment pin 200 which, for its part, is also held in the adjustment slide 182.The entrainment means 198 is held in the peripheral groove 196 of the adjustment screw such that the adjustment screw can be rotated relative thereto- and the resulting axial adjustment of the adjustment screw via the entrainment means and the entrainment pin is directly transferred to--the adjustment slide to swivel the respective cam system plate 120, 122, re- spectively. To this end, the adjustment slides comprise in the region of their inside end a further entrainment pin 202 which movably engages a recess 204in the respec tive cam system plate such that axial ad justment of the adjustment slides produces a swivel movement on the part of the cam system plates.

A compression spring 206 is supported on a pin 208, which is in turn mounted on the carrier segment, and also on a shoulder 210 of the adjustment slide of the adjustment device and constantly attempts to displace the - adjustment slide - - in -a direction~ such that the respective cam system plate is re liably held in each swivel position defining a desired depth to -which the needles are lowered. The adjustment screws 190 of both-adjustment devices 142 each carry one scale disc 212 to -enable a definite adjust ment of the cam system plates.

The swivel axes- 30, 130, respectively, of the cam system plates can be formed by hollow bolts which can be connected to an oil supply line so that there- is no necessity for special oil supply channels. This is not shown in detail.

WHAT WE CLAIM IS: 1. A circular knitting - machine compris ing at least one row of knitting cams sup ported on carrer segments, each carrier seg ment supporting a cam plate with a cam track disposed therein, the cam track con stituting two knitting cam systems, an active knitting cam system and a non-active knit ting cam system, and being laterally closed along its length, wherein each cam plate is adapted to be swivelled about an axis extending perpendicularly to the plane of the cam plate and located within the region

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **.

tween the stop bolt 60 and the helical pinion 54~ there is a laterally guided support plate 66 which abuts the pinion 54 and is - con stantly kept in contact with the stop bolt 60 by pressure exerted by a-compression spring 6O. The spring 68 acts on the bolt 60 which moves laterally in bore 62 and is hence maintained in contact with the plate 66.

Thus, this compression spring 68 ensures that the cam system plate 20, 22, respectively, is constantly maintained in a position determined by the adjustment member 56 and corresponding to the desired depth to which the needles are lowered. An indication mark 72 on the respective segment section 44, 46 is associated with a scale disc

70 mounted on the turnable member. Thus, this scale disc enbles an exact correspond ing swivelling of the cam system plates to set the depth to which the needles are to be lowered.

As is clearly apparent from Figures 1 and 2, the diameter of the bores 62 which are penetrated by the stop bolts 60 of the cam system plates is larger than'the diameter of the stop bolts. The difference in the diameters corresponds to the maximum pos sible path of adjustment of the lower end 18, so that no special stop members are re quired to limit the path of swivel move ment of the cam system plates.

The design of the carrier segment shown in Figures 4 to 8 for receiving the dial cam system plates corresponds substantially to that of the carrier segment for the cylinder cam systems. For- this reason, substantially corresponding structural parts have been given the same reference characters as in Figures 1 to 3, only increased by 100. This is also applicable to the cam system plates and their arrangement and design.

The structural difference in this carrier segment for forming the dial cam system carrier consists in the main only in the design of the adjustment devices serving to swivel the cam system plates. In accordance with the explanation above, these adjustment devices are designated generally by 142. They are mounted on the carrier segment so as to be accesible from an outer surface 143 constituting a section of the peripheral surface of the dial cam system carrier.As adjustment member these ad- adjustment devices each comprise an adjust ment slide 182 which is adapted for longitudinal displacement and slight swivel movement in a receiving groove 180 on the flat side of the carrier segment carrying the cam system plates and the adjustment slide for the cam system plate 122 which is in the rear, when the carrier segment is viewed in a horizontal position, extends into the segment section 146. The slides comprise at the end facing the surface 143 of the carrier segment a head 188 having convex lateral surfaces 184, 186, both slides being laterally guided by only the convex lateral surfaces of. this head in - the receiving gro.ove - and- therefore being held in a slightly. swivelable state in the latter.One respective adjust ment screw 190 mounted for rotation on the.

carrier - segment and accessible from the front side 143serves to longitudinally adjust the adjustment slides 182. This adjustment screw comprises on its circumference a cylindrical guide shaft 194 guided in a guide bore 192 of the carrier segment. The guide shaft has a peripheral groove 196 in which an entrainment means 198 is disposed, said entrainment means carrying an entrainment pin 200 which, for its part, is also held in the adjustment slide 182.The entrainment means 198 is held in the peripheral groove

196 of the adjustment screw such that the adjustment screw can be rotated relative thereto- and the resulting axial adjustment of the adjustment screw via the entrainment means and the entrainment pin is directly transferred to--the adjustment slide to swivel the respective cam system plate 120, 122, re- spectively. To this end, the adjustment slides comprise in the region of their inside end a further entrainment pin 202 which movably engages a recess 204in the respec tive cam system plate such that axial ad justment of the adjustment slides produces a swivel movement on the part of the cam system plates.

A compression spring 206 is supported on a pin 208, which is in turn mounted on the carrier segment, and also on a shoulder 210 of the adjustment slide of the adjustment device and constantly attempts to displace the - adjustment slide - - in -a direction~ such that the respective cam system plate is re liably held in each swivel position defining a desired depth to -which the needles are lowered. The adjustment screws 190 of both-adjustment devices 142 each carry one scale disc 212 to -enable a definite adjust ment of the cam system plates.

The swivel axes- 30, 130, respectively, of the cam system plates can be formed by hollow bolts which can be connected to an oil supply line so that there- is no necessity for special oil supply channels. This is not shown in detail.

WHAT WE CLAIM IS: 1. A circular knitting - machine compris ing at least one row of knitting cams sup ported on carrer segments, each carrier seg ment supporting a cam plate with a cam track disposed therein, the cam track con stituting two knitting cam systems, an active knitting cam system and a non-active knit ting cam system, and being laterally closed along its length, wherein each cam plate is adapted to be swivelled about an axis extending perpendicularly to the plane of the cam plate and located within the region

of its non-active knitting cam system such that the depth to which the needles are retracted may be adjusted.
2. A circular knitting machine as claimed in claim 1, wherein the cam track is of substantially the same width in the active knitting cam and the non-active knitting cam systems except for a funnel-shaped extension in the non-active knitting cam system.
3. A circular knitting machine as claimed in claim 2, wherein the swivel axis is located in the funnel-shaped extension in the nonactive knitting cam system.
4. A circular knitting machine as claimed in any preceding claim wherein the swivel axis extends approximately through the longitudinal centre line of the cam track.
5. A circular knitting machine as claimed in any preceding claim, wherein, in order to provide an interlock circular knitting machine, one cam plate is mounted above or behind another cam plate, with respect to the longitudinal direction of the needles, on each carrier segment, at least one of said cam plates comprising a non-knitting cam and a knitting cam system; and wherein the two cam plates are offset in the direction of rotation by a distance corresponding to the width of one knitting cam system.
6. A circular knitting machine as claimed in claim 5, wherein each of the sections of the carrier segments carrying a cam plate are offset in the lateral direction in accord ance with the arrangement of the two cam plates which are offset in the direction of rotation.
7. Circular knitting machine as claimed in claim 5 or 6, wherein the cam plates are adapted to be swivelled by adjustment devices mounted behind one another in the direction of rotation on the carrier segment and comprising one respective turnable member.
8. A circular knitting machine as claimed in claim 7, wherein the turnable members are accessible via the side, of the carrier segment facing away from the cam plates and behind the cam plate which is to be swivelled, and are mounted parallel to the swivel axis of the cam plate.
9.- A circular knitting machine as claimed in claim 7 or claim 8, wherein one respective adjustment member, -which is adapted to be adjusted by the turnable member m a perpendicular direction relative to the swivel axis of the cam plates and which cooperates with the cam plates, is associated with said cam plates in the carrier segment.
10. A circular knitting machine as claimed in claim 9, wherein the- cam plates comprise a stop member which is urged against an abutment surface of the associated adjustment member by a pressure member.
11. A circular knitting machine as claimed in claim 10, wherein the adjustment members associated with the cam plates are constituted by screw members which are rotatable by the turnable members in a threaded receiving member for axial adjustment in the carrier segment, and abut with their free front surface the stop member of the associated cam plate.
12. A circular knitting machine as claimed in claim 9, wherein the adjustment members of the cam plates are constituted by slides adapted to be displaced and and swivelled in the carrier segment against the effect of a pressure member and connected to the cam plates by a pin; and wherein adjustment screws disposed in the carrier segment parallel to the slides and connected to said slides by an entrainment means serve as turnable members to adjust the slides.
13. A circular knitting machine as claimed in any of the preceding claims, wherein the swivel axis of the cam plates is constituted by a hollow bolt which is adapted to be connected to an oil supply line.
14. A circular knitting machine substantially as hereinbefore described with reference to the accomyanying drawings.