DE1230166B - Thread changing device for circular knitting machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

JfULA

GERMAN m7TW> PATENT OFFICE

EDITORIAL

Int. CL:

D 04 b

Number:
File number:
Registration date:
Display day:

German class: 25 a - 25/05

M50511VII a / 25 a

October 7, 1961

December 8, 1966

The invention relates to a thread changing device for circular knitting machines with a for Laying out, clamping and cutting the thread upwardly movable thread guide and one for insertion of the thread independently of the thread guide movable thread gripper.

The invention is based on the object of assigning the thread guide and the thread gripper to one another in such a way that that they can be actuated electromagnetically or pneumatically.

According to the invention, this object is achieved in that the thread gripper at its lower end carrying thread gripper rod in an axial bore of the holder for the thread guide at its lower end bearing thread guide rod is guided and the upper protruding from this axial bore The end of the thread gripper rod and the thread guide rod are guided in a common housing, a pin protruding perpendicularly from the thread guide rod into a pin parallel to the axis of the rods Slot of a non-rotatably fixed socket in the housing and one perpendicular from the thread gripper rod protruding pin in an arcuate slot of a second socket fixed in the housing in a rotationally fixed manner engages and one from below against the thread gripper rod and from above against the thread guide rod helical compression spring supporting the thread gripper and the thread guide rod against stops presses in the housing and so the thread guide and thread gripper, which work together with a thread guide plate, holds in its normal position, from which it is independent against the action of the helical compression spring from each other by an inside the housing directly to the thread guide or thread gripper rod attacking force are electromagnetically or pneumatically displaceable.

Thread changing devices or thread loading and unloading devices with a thread gripper that cooperates with the thread guide and is movable independently of the thread guide are known. These are devices in which the thread guide and gripper have a tangled and complex gear and lever gears can be operated from the machine drive. These well-known Devices are not suitable, thread guides and thread grippers directly from work-performing units to operate, the space-saving together with the thread guide and thread looper carrier in one Housing can be accommodated.

An embodiment of the invention with an electromagnetically operated thread guide and thread gripper rod and further in the claims ge thread changing device for
Circular knitting machines

Applicant:

Franz Morat G. m. B. H.,

Stuttgart-Vaihingen, Hessbrühlstr. 51

Named as inventor:

Richard Schmidt,

Werner Jansch, Stuttgart-Vaihingen;

Richard Rail, Musberg

marked features is shown in the drawing and described below. It shows

Fig. 1 is a side view of the thread changing device tion,

FIG. 2 is a partial view from the front, specifically in section along the line II-II in FIG. 1,

F i g. 3 shows a side view of the clamping spring along the section line III-III in FIG. 2,

F i g. 4 with a plan view of the thread guide plate Thread guide and thread gripper, from the line IV-IV in F i g. 2 seen from

F i g. 5 is a side view of the thread gripper, from section line V-V in FIG. 4 seen from

F i g. 6 shows a section through the magnetic cylinder with the storage of the thread guide and thread gripper rod.

On a fixed part of the circular knitting machine is the one that runs at right angles to the thread guide plate holder 2 Web 4 of the same fixed by means of a screw 3 adjustable up and down. The thread guide plate holder 2 and the web 4 are one piece or by means of screws or by welding to one another tied together. At the upper end of the web 4, the sleeve 6 can be pivoted and locked by means of a screw 5 connected, in whose bore the magnetic cylinder? axially adjustable by means of the screw 6 α is clamped.

The magnetic cylinder shown in FIG. 6 is shown in section, consists of the tube 8 in which the two Electromagnets 9 and 10 are used one behind the other with the same axis. Between the two magnets 9 and 10 and on the upper face of the upper magnet 9 and on the lower face of the lower magnet 10 sit from the tube 8 held bearing bushes 11,12 and 13, in which the guides 14 and 15 for the armature 16 and 17 are held. At the bottom

Claims (1)

Part of the tube 8 sits conically downward from the end bearing 40 protruding from the tube at the lower free end of the thread gripper rod 22 , which is axially attached to the armature 17 thread gripper 34. This thread gripper has been slidable. A hook 34a is attached to the thread guide rod 18 at its free end , the opening pin 19 of which protrudes into the straight slot 20 extending downward and obliquely forward, into which the thread guide plate 28 is fixed in the end bearing 40 a bushing 21 is cut in its part 28 α. As a result, the thread Fadenleitschlitz 28 c, which is secured in the needle cylinder guide rod 18 against rotation. direction of movement behind the thread guide 30 The thread guide rod 18 has an axial bore, io starting arcuate to the rear and above- through which the thread gripper rod 22 passes, half of the needle hook ends. On the thread guide plate which holder 2 up to the upper magnet armature 16 is the clamping spring behind the thread guide is enough, is firmly connected to this and at the bottom from 35 and behind the knife 36. the thread guide rod 18 protrudes. The upper Ma- The device works as follows: In the drawn- The gnetanker 16 has at its end a position in the right 15, the thread guide 30 is in Angle to its axis extending pin 23, which is in its lowest position, since the armature 17 of the a slot 24 protrudes. This slot 24 is not affected in solenoid. The thread gripper a sleeve 25 incised, the one on the upper 34 is in its highest position, since the too Front side of the upper bearing bush 11 is attached. associated armature 16 is not affected. In This slot 24 runs in a curve, so that the thread runs in this position of the thread guide Magnet armature 16 and thus the thread gripper rod 22 from the thread eyelet 30 α through the rear end of the during the axial movement also their rotational movement of the thread guide slot 28 c to the needles. The string the sense and purpose of which is described below. If the thread is to be laid out, ben is. then the lower magnet 10 receives current, which the On the thread gripper rod 22 is between the one armature 17 and with it the thread guide rod 18 and on the facing end faces of the magnet armature 16 lifts the thread guide 30 upwards. The upper end and 17 a helical compression spring 26 with a little in front of the thread guide 30 is inserted into the thread clamping tension, so that the upper magnet armature hole 31, so that the thread between the lower 16 with its thread gripper bar 22 under the weak edge of the clamping hole and the collar 30 c fixed spring pressure is held in its uppermost position 30 is clamped. Through the further movement of the magnetic armature 17 and the lower magnet armature 17 with its thread end, the thread is tensioned so that it is located under the guide rod 18 in the lowest position. The magnetic clamp spring 35 pulls and at the same time the armature 16 and 17 protrude from top to bottom or from the sharp edge 36 a of the knife 36 is cut from bottom to top. The magnet winding 9 or 10 is. The thread guide then goes back into his, so that when the magnet is energized 35 low position, so that the increased magnetic force field between the thread winding acts on the eyelet 30 α and the clamping spring 35 thread part anchor. The upper part of the tube 8 is closed by a plug 27 located under the hook 34 α of the thread gripper 34, which is screwed into the tube 8 with thread 27 α If the thread is to be inserted again, then it is provided. the upper solenoid 9 current that the armature 16 Fig. 1 shows the magnetic cylinder 7 in connection 40 and with it the thread gripper rod 22 and with the other parts of the thread changing device. Thread gripper 34 pulls down. As already mentioned, the magnetic cylinder 7 is a pivoting movement via the armature 16 and thread gripper rod 22 through the curve sleeve 6 with the web 4 of the thread holder 2 in 24, which is such that the lockable connection with the machine. The hook 34 α of the thread gripper 34 going downward thread guide plate holder has the shape which is pointed against the movement 45 of the thread part between the thread eyelet 30 α and the clamping direction of the needle cylinder. At spring 35 takes hold and pulls down, the notihm the agile multifilament is screwed through the eyelet of the thread-thread guide plate 28, which is bent down approximately at right angles. The magnet cylinder coil is pulled, but the free end is still below the 7 so that the clamping spring 35 protruding from the bottom remains. This thread is then drawn ends of the thread guide rod 18 and the thread 50 around the thread guide plate to below the opening gripper rod 22 in front of the front edge of the bent of the thread guide slot and comes there in the part 28 α of the thread guide plate. At the area of the needles that grasp the thread and the thread guide rod 18, the thread guide rod 18 is knit at right angles to it, whereby the thread guide holder 29 with the screw clamps the thread guide holder 29 with the screw to the end of the thread guide slot 28 c 29 a due to the further movement of the needles. At the free end of this thread 55 is pulled. The thread gripper moves immediately leader holder sits the thread guide 30 with the thread back up, eyelet 30 a. Above the thread guide holder 29 is at the end of the end bearing bushing 40 of the magnet ^p cylinder 7 of the thread clamping hole holder 31 with the 1st thread changing device for circular knitting screw 31 α clamped, at the free end 60 machines with a for laying out, clamping the thread clamping hole 32 is drilled. This thread and cutting of the thread upwardly movable clamping hole runs coaxially to the thread guide 30, thread guide and one for inserting the thread so that during the movement of the thread guide rod 18 independently of the thread guide movable thread upwards the free end of the thread guide up to the gripper, characterized in that Thread eyelet 20 α into the thread clamping hole 32 which is pushed at its lower end the thread gripper (34) and the thread, which passes through the thread-carrying thread gripper rod (22) in an axial eyelet 30 α , on the collar 30 c below the bore the holder of the thread eyelet 30 α is clamped at its lower end. (29) for the thread guide (30) carrying the thread Guide rod (18) is guided and the upper end of the protruding from this axial bore Thread gripper rod (22) and the thread guide rod (18) in a common housing (27, 8, 40), a pin (19) protruding vertically from the thread guide rod (28) in a slot (20), parallel to the axis of the rods, of a bushing (21) fixed in the housing so that it cannot rotate and a pin (23) projecting perpendicularly from the thread gripper rod (22) into an arcuate one Slot (24) of a second socket (25) fixed in a rotationally fixed manner in the housing engages and one extends from below against the thread gripper rod (22) and from above against the thread guide rod (18) supporting Helical compression spring (26) the thread gripper and the thread guide rod (18 and 22) against stops in the housing presses and so thread guide (30) and thread gripper (34) with a thread guide plate (28) work together, holds in their normal position, out of which they counteract the action the helical compression spring (26) independently of one another by a directly inside the housing Electromagnetic or force acting on the thread guide or thread gripper rod are pneumatically displaceable. 2. Thread changing device according to claim 1, characterized by the thread clamp forming resilient wire bracket (35) on the thread guide plate holder (2) at one end attached to this resiliently resting next to the thread guide (30) in the normal position is, as well as by a knife (36) on the thread guide plate holder (2), the cutting edge (36 a) extending approximately at right angles to the baffle holder surface, next to the free end of the resilient Wire bracket (35). 3. Thread changing device according to claims 1 and 2, characterized by an am Auxiliary clamp (31) attached to the end of the housing end bearing (40) and having a common axis the rods (18 and 22) axially parallel bore (32) which is coaxial with the thread guide (30), is widened conically at its end facing the thread guide (30) and with the conical free end of the thread guide (30) fits together. 4. Thread changing device according to claims 1 to 3, characterized in that for electromagnetic actuation of the thread guide (30) and the thread gripper (34) in the housing (27, 8, 40) two electromagnets (9 and 10) are arranged on the same axis one above the other, of which cylinderf shaped anchors (16 and 17) one (16) with the thread gripper rod (22) and the other (17) is firmly connected to the thread guide rod (18). Considered publications:
German patent specifications No. 836 073, 683 494,
726; French Patent No. 1190 997;
U.S. Patent No. 1502,486. Legacy Patents Considered:
German Patent No. 1169 075. 1 sheet of drawings 609 730/37 11.66 © Bundesdruckerei Berlin