CN102995284B - Flat knitting machine - Google Patents

Abstract

The invention relates to a flat knitting machine (10) with a plurality of yarn inspection devices (13) arranged above at least one needle bed, adjacent in the longitudinal direction of the needle bed and at least partially transverse to the direction of the needle bed arranged offset from each other.

Description

Flat Knitting Machine

technical field

The invention relates to a flat knitting machine with a plurality of yarn inspection devices arranged above at least one needle bed for monitoring the weaving thread drawn off from a bobbin.

Background technique

In modern knitting machines, such a yarn inspection device is accordingly arranged between the bobbins and the processing area. They usually have a yarn brake, a knot detector (Knotenwaechter) as well as a yarn breakage sensor and a leveling tensioner (Aufholspanner). In the case of flat knitting machines, a support is provided above the needle bed, on which a large number of these checking devices are arranged, since at least one such checking device has to be associated with each thread guide of the knitting machine.

In current machines, all yarn inspection devices are arranged adjacently in the longitudinal direction of the needle bed. However, for knitting machines where the twisted yarn is supplied to the thread guide from above, this arrangement causes some difficulties. In the vicinity of the yarn inspection device, the yarns are not unraveled strongly enough that crossing yarns can touch each other and thus remain twisted together. Therefore, in many knitting machines, an additional threading mechanism is arranged on the end face, which ensures the necessary fanning of the yarn and uninterrupted supply to the thread guide. However, this wire system leads to additional deflections and thus to a load on the weaving thread.

In the case of yarn feeding from above, length-adjustable yarn inspection devices have been used in order to avoid contact of crossing yarns. During the movement of the entire yarn inspection device, the movement path on the yarn guide rail is relatively long, which makes the construction of such a yarn inspection device very complicated. Furthermore, it has been found difficult to rule out mutual yarn contact even with such length-adjustable yarn inspection devices when the yarn guides are in motion. This is all the more so when patterns are to be knitted for which several yarn guides have to be driven in opposite directions. The devices of such machines for weaving the mentioned pattern are likewise very complex in design and require a great deal of experience of the fitter.

Contents of the invention

It is therefore the object of the present invention to provide a jersey knitting machine in which the association of the thread inspection device with respect to the thread guide is simple to implement even for unskilled users.

This object is achieved by a flat knitting machine with a large number of yarn inspection devices arranged above at least one needle bed (which respectively have at least one knot monitor, yarn brake, yarn breakage sensor and leveling tensioning device), characterized in that the yarn inspection devices are arranged adjacent to each other in the longitudinal direction of the needle bed and at least partially offset from each other transversely to the longitudinal direction of the needle bed.

Contact between intersecting threads can be easily ruled out by the offset arrangement of the thread inspection device transversely to the longitudinal direction of the needle bed, since each thread can be guided in a different plane. When the yarn guide (to which the yarn is supplied) moves, then also no yarn contact occurs.

It is advantageous here for the construction of the entire machine when the yarn inspection device is supported on one or more common supports, the (multiple) supports on a plurality of parallel yarn guide rails (where longitudinally displaceable) Correspondingly arranged at least two yarn guides) extend above in the longitudinal direction of the needle bed and transversely thereto. In order to ensure the arrangement of the yarn inspection device transversely to the longitudinal direction of the needle bed and therefore also the longitudinal offset of the thread guide rail, the support can have such a , that is, each yarn guide of the needle groove (Spur) is associated with at least one yarn inspection device. For this purpose, the support(s) can have, for example, a V-shaped or W-shaped course in the horizontal plane. Thus, the yarn inspection devices can be arranged adjacently in the support as in known machines, but at least partially offset from one another due to their shape. However, the association of the at least one thread inspection device with respect to each thread guide by mutual offset transversely to the longitudinal direction of the needle bed can of course also be realized differently than by a common, correspondingly formed support. Thus, for example, the thread inspection device can also be arranged displaceably in the transverse direction on the machine.

A further advantage results when the support extends over the entire length of the jersey knitting machine. Complex patterns requiring a large number of different weaving threads can also be easily produced in this way. Since each thread guide rail is usually equipped with at least two thread guides and usually knits in the middle region of the machine, it is also advantageous if the support is constructed symmetrically with respect to the middle plane of the jersey knitting machine.

The individual weaving threads can of course also be supplied to the individual yarn guides in the arrangement according to the invention of the yarn inspection device via a guide mechanism at the end face of the jersey knitting machine, however, due to the deflection of the yarn inspection device The arrangement makes it possible to dispense with such a lateral guide mechanism and to feed the thread feeder directly from above. It is particularly advantageous here if the yarn inspection device associated with the thread guide is arranged above the track of the yarn guide. The yarns supplied to the individual yarn guides then remain in the vertical plane defined by the yarn guide tracks, so that mutual contact of crossing yarns can also be ruled out when the yarn guides are moved.

Description of drawings

A preferred embodiment of the flat knitting machine according to the present invention will be described in detail below with reference to the accompanying drawings.

in:

Figure 1 shows a schematic front view of a jersey knitting machine;

FIG. 2 shows a top view of the yarn inspection device support for the jersey knitting machine in FIG. 1 .

detailed description

The jersey knitting machine 10 according to FIG. 1 has a support 12 arranged above a machine frame 11 for a plurality of thread inspection devices 13 . These yarn inspection devices check the yarn drawn off from the bobbin 14 for knots or yarn breaks and are also usually provided with a yarn brake for generating the desired yarn tension. The yarn is supplied to one of the yarn guides 15 by the yarn inspection device 13 directly from above or via guide wires 16 , 17 arranged at the end face of the jersey knitting machine 10 . The thread guides 15 are arranged longitudinally displaceably in a rail system 18 having a plurality of parallel tracks, wherein at least two thread guides 15 are guided in each track. The yarn guides are moved along the tracks of the system 18 during the weaving process. Thus, the supplied yarns of the two yarn guides can cross. This is not a problem as long as the yarns do not touch here. The unraveling of the yarn transversely to the longitudinal direction of the machine is usually carried out in known knitting machines by means of lateral thread guides 16 , 17 . According to the invention, however, it is provided that the thread can also be supplied directly (that is to say from above) to the thread guide 15 by the thread inspection device 13 without such contact of intersecting threads. For this purpose (as illustrated in FIG. 2 ), in the example shown, the thread inspection device 13 is arranged on the V-shaped bent support 12 . They thus have a mutual offset in the direction of the double arrow 19 , that is to say transversely to the machine longitudinal direction. The carrier 12 should be designed in such a way that the outlet opening of the thread inspection device 13 is arranged above one of the tracks of the track system 18 of the thread guide 15 . In this way, the yarn supplied to the yarn guide 15 by the respective yarn inspection device 13 extends in the vertical plane defined by the track. The V-shape of the carrier 12 has the result that two of the yarn inspection devices 13 are respectively arranged in the same position in the direction of the arrow 19 , that is to say can be associated with the same thread guide track. It is recognized to be advantageous when there are two thread guides in each thread guide track. For machines with four yarn guides per track, the support 12 can also be configured eg W-shaped, so that four yarn inspection devices can be associated with one yarn guide track respectively. Due to this embodiment of the support 12 , it is also simple for an unskilled fitter of the machine 10 to associate the thread inspection device 13 with the thread guide 15 . It does not have to take into account the movement of the individual thread guides 15 in order to be able to exclude contact of the weaving threads.

The support 12 can also be constructed in multiple parts. Alternatively, several supports can also be arranged adjacent to each other.

Claims (8)

1. a flat pin knitting machine, it is with a large amount of yarn testing fixture (13) be arranged in above at least one needle-bar knitting line for monitoring from bobbin extraction, it is characterized in that, described yarn testing fixture (13) is adjoined ground and is arranged offset from each other at least in part transverse to described needle-bar longitudinal (19) on needle-bar is longitudinal.

2. flat pin knitting machine according to claim 1, it is characterized in that, support (12) place that is that described yarn testing fixture (13) is bearing in one or more single type or multi-piece type, described support (12) multiple parallel thread-carrier track (18) top needle-bar longitudinally on and extend transverse to this place, at described thread-carrier track (18) place, corresponding longitudinal direction is furnished with at least two thread-carriers (15) movably.

3. flat pin knitting machine according to claim 2, it is characterized in that, described support (12) has such trend in the plane of the level of described thread-carrier track (18) top, and namely each thread-carrier (15) of needle tray is associated with at least one yarn testing fixture (13).

4. flat pin knitting machine according to claim 2, is characterized in that, described support has the trend of V-arrangement or W shape in the plane of the level of described thread-carrier track (18) top.

5. flat pin knitting machine according to claim 2, is characterized in that, described support (12) integrally extends in the whole length of described flat pin knitting machine (10).

6. flat pin knitting machine according to claim 2, is characterized in that, described support (12) has the trend that the mid-plane that is symmetrical in described flat pin knitting machine constructs.

7. flat pin knitting machine according to claim 2, is characterized in that, described yarn testing fixture (13) directly and be supplied to described thread-carrier (15) from top by described yarn.

8. flat pin knitting machine according to any one of claim 1 to 7, is characterized in that, the described yarn testing fixture (13) being associated with thread-carrier (15) is arranged in above the track of described thread-carrier (15).