JPS6229540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is characterized in that a knitted fabric drawing shaft supported and driven just below the needle bed cooperates with opposing pressing mechanisms.
The present invention relates to a drawer device for a flat knitting machine.

BACKGROUND OF THE INVENTION A knitted fabric drawing device of this type is known, for example, from German Patent No. 2 650 630.
This drawing device serves only as an auxiliary drawing device in front of the main drawing rollers located one step below the needle bed.

Problem to be Solved The problem on which the invention is based is to design a drawing device located directly below the needle bed in such a way that it has a simple structure and can be used as the only drawing device of a knitting machine. .

Means for Solving the Problem In order to solve this problem, according to the present invention, the knitted fabric drawer shaft is constructed as a polygonal shaft, and a plurality of spring lamellas are provided as opposing pressing mechanisms, so that one end of the knitted fabric drawer It is attached to an adjusting shaft parallel to the axis and in its operating position has its other free end area in contact with the polygonal shaft over one rotation thereof. The spring leaf can vary the contact pressure on the fabric draw-off axis by rotatable support of the adjusting shaft or the fabric draw-off axis, for example in order to insert the fabric from below into the comb-like gap of a flat knitting machine. It's good to be able to swing away from it. In order to achieve a uniform force distribution, it can be provided that the knitted fabric draw-off shaft is divided into a plurality of successive shaft sections, preferably with edges offset from each other in the circumferential direction.

It has been found that the ridge of the shaft together with the spring lamella reliably grips the knitted fabric hanging down from the comb-like gaps of the flat knitting machine. Here, the flat knitting machine may or may not have a push-down piece. The knitted fabric drawer shaft can be assembled from its individual parts in a simple and inexpensive manner, for example as a knitted fabric drawer spindle that is sectioned into individual rings provided at intervals. Even with the knitted fabric pull-out shaft according to the present invention, division by the intermediate support part is unavoidable in a needle bed of normal length of a flat knitting machine, but this is only in a few places and in a relatively narrow range, and the knitted fabric to be pulled out is In these ranges, it is not gripped by the polygonal axis. Since there is virtually no round rotating part that comes into contact with the knitted fabric to be drawn, even if individual threads droop, there is no risk that these threads will wrap around the rotating part, as in conventional drawing devices.

It has been found that with the drawing device constructed according to the invention no special spreading devices are required in the edge area of the knitted fabric. There is also no risk of the product being pulled out diagonally towards the edge due to the round pull-out rollers in conventional draw-out devices. The invention provides uniform drawing over the entire width of the knitted fabric, including the edge area. In this case, a counter-pressing mechanism consisting of individual spring lamellas arranged at a distance from each other also plays an important role, whose pressing force on the polygonal fabric withdrawal shaft is adapted to the material to be processed and the thickness of its threads. It is adjusted accordingly. At the same time, these spring foils also produce the effect of a conventional spreading device in the area of the edges of the knitted fabric.

When the starting edge reaches the rotation range of the knitted fabric drawer shaft,
It was found that even smooth knitted fabrics can be reliably gripped by a knitted fabric drawer shaft with a square or equilateral triangular cross section. A push-down piece can assist in feeding the starting end of the knitted fabric into the drawer, but is not necessary.

The ridges of the knitted fabric drawer shaft project into a central plane extending through the comb-like gaps between the needle beds of the flat knitting machine, and the spring lamina extends at least centrally into the shaft outer surface between each two ridges of the knitted fabric drawer shaft. As if extending to
It is advantageous if the drawing device can be dimensioned. It can be provided that the tip of the spring leaf is bent outwards away from its free other end region in the direction of fabric withdrawal, thereby facilitating the removal of the fabric from the withdrawal device.

The polygonal knitted fabric drawer shaft can be operated continuously at a rotational speed that matches the operating speed of the knitting machine. However, it is advantageous if the fabric draw-off shaft is provided with a drive that can be started and stopped in a controlled manner, so that the draw-off device can be stopped, for example, during stitch transfer or swing knitting.

Embodiments Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 show two needle beds 10 and 11 arranged in an inverted V shape in a flat knitting machine,
The heads 13 of the fin-like projections 12 which define the needle guide slits of these needle beds form the comb-like gaps 14 of the knitting machine. In the illustrated embodiment, a push-down piece 15 projects into the comb-shaped gap 14 and is movable along the comb-shaped gap 14 together with a carriage (not shown). Furthermore, in FIG. 3, holders 16 and 17 of the knitted fabric drawing device which exit downwardly from the comb-shaped gap 14 are arranged below the two needle beds 10 and 11.

The drawing device consists of a knitted fabric drawing shaft 18 and an adjustment shaft 19, both shafts 18, 19 are connected to the needle bed 10,
11 and extending parallel to each other over their entire length under shaft 18 and supported in main bearings 20, 21 and 22 at each end of the knitting machine as shown in FIG.
and 19 are supported in intermediate bearings 23 and 24 which partially surround them and support them on holders 16 and 17.

The knitted fabric pull-out shaft 18 has a belt pulley 25 at one end, and a drive belt 26 that runs around the belt pulley.
is transmission coupled to a drive motor 27 which can be started and stopped in a controlled manner. The knitted fabric drawer shaft 18 has a square cross-section in its active area and is divided into a plurality of parts, each separated from one another by an intermediate bearing 23, of which three parts 18/1, 18/1,
18/2 and 18/n are shown, ridge 2 of the shaft portion
8 are offset from each other in the circumferential direction by 45°, as can be seen in FIGS. 2 and 3. Of course, other deviation angles may also be used.

According to FIG. 1, the adjusting shaft 19 is provided with a plurality of strip-shaped spring lamellas 29, which according to FIGS. They are fixed to the adjustment shaft 19 by means of a polygon, and their other free end region 32 is in contact with the polygonal part of the knitted fabric drawer shaft 18 under preload. The spring leaf 29 is connected to the edge 28 of the knitted fabric drawer shaft 18.
The length of the knitting machine center is chosen so that it protrudes at least to the center of the flat outer shaft surface between the knitting machine centers and extends through the comb-shaped gaps 14 of the flat knitting machine, as shown in dashed lines in FIG. Knitted fabric drawer shaft 1 until the middle of surface 34
Knitted fabric drawer shaft 18 so that ridge 28 of No. 8 protrudes
is determined in size. The tip 33 of the spring leaf 29 is bent away from the contact area and outward in the direction of fabric withdrawal, as shown in FIGS. 2 and 3.

The adjustment shaft 19 has a side arm 35 shown in FIGS. 1 and 2 at one end thereof, and an adjustment screw 37 fixed to the knitting machine body 36 is passed through the free end of the side arm 35.
Its head 38 forms the stop of the lateral arm 35. By turning the adjusting screw 37, the adjusting shaft 19 is turned in its bearing over a limited angular range, so that the pressing force of the curved spring leaf 29 on the fabric drawing shaft 18 is varied. After installing the adjusting screw 37 and releasing the lateral arm 35, the adjusting shaft 19 is turned so that the spring leaf 29 is swung away from the knitted fabric draw-out shaft 18 and thus the comb-like gap 14
You can freely approach it from below.

The starting end of the knitted fabric formed on the flat knitting machine and guided downward through the comb-like gaps 14 is gripped by the ridge 28 of the knitted fabric draw-out shaft 18 driven clockwise.
The smooth spring lamina 28 is moved towards the ridge 28
The knitted fabric is drawn out through the space between the knitted fabric drawing shaft 18 and the spring leaf 29 into the free space between the holders 16 and 17 of the flat knitting machine. There, the knitted fabric can freely fall into a knitted fabric receptacle or the like. There is no need to provide a second extraction device afterwards.

Instead of the relatively wide spring leaf 29 present in the illustrated embodiment, it is also possible, for example, to use a rod-shaped spring leaf which is assembled into a comb-like spring that is fixed to the adjusting shaft 19.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the drawing device with the needle bed removed, Fig. 2 is a view of an inverted V-shaped needle bed flat knitting machine equipped with the drawing device, seen in the direction of the arrow in Fig. 1;
FIG. 3 is a sectional view of the drawing device of the flat knitting machine taken along the line - in FIG. 1. 10, 11...needle bed, 18...knitted fabric drawer shaft,
19... Adjustment shaft, 29... Spring leaf, 30... One end, 32... Free other end range.

Claims (1)

[Claims] 1. In a fabric drawing shaft supported and driven just below the needle bed, in which the fabric drawing shaft 18 cooperates with the opposing pressing mechanism, the fabric drawing shaft 18 is configured as a polygonal shaft, and the opposing pressing mechanism As shown in FIG. A drawer device for a flat knitting machine, characterized in that the drawer device is in contact with each other for one rotation. 2. The adjustment shaft 19 is rotatably supported within a limited range in order to change the relative position of the spring leaf 29 with respect to the knitted fabric drawer shaft 18 and to adjust the contact pressure of the spring leaf 29. A drawer device according to claim 1. 3 The knitted fabric drawer shaft 18 has a plurality of consecutive shaft portions 18/1, 1 having ridges 28 that are offset from each other in the circumferential direction.
The drawer device according to claim 1 or 2, characterized in that it is divided into 8/2 and 18/n. 4. The ridge 28 of the knitted fabric drawer shaft 18 projects into a central plane 34 extending through the comb-like gap 14 between the needle beds 10, 11 of the flat knitting machine. The drawer device according to item 3. 5. Drawer according to any one of claims 1 to 4, characterized in that the knitted fabric drawer shaft 18 is connected to a drive device 27 that can be started and stopped in a controlled manner. Device. 6. According to claim 1, the spring leaf 29 as a counter-pressing mechanism extends at least to the center of the outer surface of the shaft between two edges 28 of the knitted fabric drawer shaft 18. drawer device. 7. Drawer according to claim 1 or claim 6, characterized in that the tip 33 of the spring leaf 29 is bent outwards away from its other free end region 32 in the direction of knitted fabric withdrawal. Device. 8 Knitted fabric drawer shaft 18 or its portion 18/1,
6. Drawer device according to claim 1, characterized in that 18/2 has a square cross section. 9. The drawer device according to any one of claims 1 to 5, wherein the knitted fabric drawer shaft 18 or a portion thereof has an equilateral triangular cross section.