TW201508106A - Drafting arrangement for a knitting machine - Google Patents

Abstract

Drafting arrangement (10) for a knitting machine for the production of a fibre structure consisting of a roving with double aprons guided over apron rollers (16) and an output roller pair (17), wherein the apron rollers (16) and the output roller pair (17) respectively have a press roller (16.2, 17.2) and an electric motor-driven drive roller (16.1, 17.1) and the rollers (16.1, 16.2, 17.1, 17.2) and the electric motors (13, 14) are arranged on the front side (12) of a base plate (11), whereas the motor shafts (13.1, 14.1) are passed through the base plate (11) and are connected by means of drive devices (21, 22) to the shaft members (16.3, 17.3) of the drive rollers (16.1, 17.1) mounted in the base plate (11), wherein a clamping device (25) is provided on the rear side (18) of the base plate (11), with which clamping device the press rollers (16.2, 17.2) of the apron roller pair (16) and the output roller pair (17) can be pressed against the drive rollers (16.1, 17.1).

Description

Draw frame for knitting machines

The invention relates to a drawing machine for a knitting machine for producing a fiber structure, which is composed of a roving machine with a double apron guided on a apron roller and an output roller pair, wherein the apron roller and the output roller pair Each of the driving rollers is driven by a pressure roller and an electric motor, and the roller and the electric motor are disposed on a front side of a substrate, and the motor shaft is connected to the shaft member of the driving roller mounted in the substrate through the substrate and by a driving device.

This draw frame is described in World Patent WO 2009/026734 A1. It is used to produce a draw fiber structure from a roving machine and a needle for feeding this directly to the knitting machine. The woven sheet feed from the fiber structure (which has substantially parallel fibers) is lighter than the woven sheet produced from the yarn. If the knitting machine is equipped with this draw frame, the spinning process is not necessary. Knitwear is made directly from the roving machine.

In the known draw frame, all components except the serrated belt for the bottom roller are located on the front side of the base of the draw frame. However, the result is that these draw frame components are also exposed to the fiber fly, which passes through the draw frame in the fiber structure The period is inevitable and it is thus immediately defaced. However, the cleaning of the draw frame is quite cumbersome because there are many components attached to the front side of the substrate.

Accordingly, it is an object of the present invention to provide a draw frame for a knitting machine in which it is easier to clean because the fiber fly is less stressful on the assembly.

The object is achieved by a draw frame for a knitting machine for the production of a fiber structure, which is composed of a roving machine having a double apron guided on a apron roll and an output roll pair, wherein the apron roll and The output roller pair has a driving roller and an electric motor driven driving roller, and the roller and the electric motor are disposed on a front side of a substrate, and the motor shaft is connected to the driving roller mounted in the substrate through the substrate and by a driving device. The shaft member is characterized in that a clamping device is disposed on the rear side of the substrate, and the pressing roller of the apron roller pair and the output roller pair can be pressed against the driving roller by the clamping device.

The clamping device which presses the pressure roller to the driving roller so that the fiber structure is slatted is also disposed on the front side above the pressure roller in the conventional draw frame. Since each of the press rolls must act on the clamping device, there is a relatively large number of components which, when placed on the front side of the draw frame, i.e. on the passage side of the fiber structure, are exposed to the fibers and become dirty. The pressure roller must be cleaned regularly, and even worse, it is not easy to clean the roller pair and the apron, because entering from above will be hindered.

In the draw frame of the present invention, all of the components of the clamping device are disposed on the rear side of the draw frame where they are not contaminated by the fiber fly and do not obstruct the free access to the roller pair and the apron on the front side. Therefore, the draw frame display according to the present invention However, it is easier to maintain than the conventional draw frame.

In a preferred construction of the draw frame, the shaft member of the press roll is guided through the opening in the substrate with clearance and moved up and down in the opening by the clamping device. When the clamping device is relaxed, the roller can be moved by hand in the clearance allowed by the opening to facilitate, for example, replacement and/or cleaning of one of the rollers or one of the rollers.

It would be advantageous if the components of the pressure roller were rotatably mounted in the slider on the rear side of the substrate, wherein a spring force could be applied to the slider by the clamping device. The slide mountable on the guide provides precise movement of the press roller shaft member by the spring force generated by the clamping device, wherein the spring force can be generated by a spring associated with each slide.

In this configuration of the clamping device, if the clamping device has a track which is more advantageous, it extends over the slide and is displaceably arranged on the substrate, whereby contact pressure can be generated. The pressure roller can thus be pressed against the drive roller or released by the simple displacement of the track. In this regard, the track can be configured to be displaced in the longitudinal direction on the substrate and can be provided with a cam, wherein the cam of the track acts on a spring that interacts with the slide. It is preferable to use a pin torsion spring as a spring. The spring can be disposed in an adjustable spring block such that the spring force generated by the spring can be adjusted by the displacement of the spring block.

However, the draw frame according to the invention can also have a pneumatic, hydraulic or electric clamping device instead of a mechanical clamping device.

In this case, the clamping device itself can be actuated and stopped in a conventional manner by a rotating rod connected to the clamping device. The rotating rod can be disposed outside the substrate housing, which is convenient for access in this case.

The draw frame can be constructed differently depending on the roving to be treated. The 3-roller draw frame is commonly used more frequently, that is, in addition to the apron roller and the output roller, the draw frame can have an input roller pair, and the press roller can also act on the clamping device.

A further solution to reduce the fiber fly-out fouling machine is that the motor can be protected from fiber flying by a removable covering. Furthermore, a getter member can be disposed on the pair of output rollers, and the fibers and dust can be drawn therethrough before being placed on the draw frame.

Even if the rear side of the draw frame is not in direct contact with the fiber structure, it can also protect the back side of the substrate by a removable cover.

The invention further relates to a knitting machine, preferably a circular knitting machine, provided with at least one draw frame according to the invention.

10‧‧‧Drawing machine

11‧‧‧Substrate

12‧‧‧ front side

13, 14‧‧ ‧ motor

13.1, 14.1‧‧‧ axis

15‧‧‧Input roller pair

15.1, 16.1, 17.1‧‧‧ driven roller

15.2, 16.2, 17.2‧‧‧ upper pressure roller

15.3, 16.3, 17.3‧‧‧ shaft members

15.4, 16.4, 17.4‧‧‧ shaft members

16‧‧‧Aperture roller pair

17‧‧‧Output roller pair

18‧‧‧ Back side

19‧‧‧Electronics Department

20‧‧‧Mechanical Department

21, 22‧‧‧Sawtooth belt

25‧‧‧Clamping device

26‧‧‧Spring block

27, 28, 29‧‧‧ pin torsion spring

30‧‧‧ Track

31‧‧‧Clamping rod

32‧‧‧ cam

33, 34, 35‧‧‧ skateboarding

36‧‧‧ openings

A preferred exemplary embodiment of a draw frame according to the present invention will be described later with reference to the drawings.

Figure 1 is a perspective view of the front side of a draw frame; Figure 2 is a rear view of the draw frame of Figure 1; Figure 3 is a detailed view of the draw frame of Figure 1 and the clamping device in action; Figure 4 corresponds to Figure 3 is a view showing a non-operating clamping device; Figure 5 is an enlarged view of a detail of the rear side of the draw frame of Figure 1; and Figure 6 is an enlarged view of a detail of the axial passage through the draw frame of Figure 1.

The draw frame 10 of Fig. 1 has a substrate 11 on its front side 12 with two motors 13, 14, an input roller pair 15, a pair of apron rollers 16, and an output roller pair 17. Each pair of rollers 15, 16, 17 consists of a lower driven roller 15.1, 16.1, 17.1 and an upper pressing roller 15.2, 16.2, 17.2. The fiber structures to be taken up by the draw frame and not described are individually passed between the upper drive rollers 15.2, 16.2, 17.2 and the lower drive rollers 15.1, 16.1, 17.1. The desired draw of the fiber structure is achieved by the different speeds of the pair of rolls.

The motors 13, 14 are protected from fiber flying by a cover that has been omitted from Figure 1. Further, one of the suction devices is omitted from the output roller pair 17 for clarity of the drawing.

2 discloses a rear side 18 of the substrate 11, on which an electronic portion 19 of a draw frame 10 and a mechanical portion 20 are disposed. The more precise structure of the mechanical portion 20 is disclosed in Figures 3-6. Both the electronic portion 19 and the mechanical portion 20 are shielded from the outside by a cover of the outer casing. However, the outer cover is not disclosed herein to facilitate the visibility of the components of the draw frame 10.

It can be seen from Figure 3 that the axes 13.1, 14.1 of the motors 13, 14 pass through the substrate 11 to the rear side 18. Here, the shaft member 17.3, which is also driven by the output of the substrate 11, is driven by the shaft 13.1 by a sawtooth belt 21, while the shaft 14.1 drives the apron drive roller 16.1 with a sawtooth belt 22 and a plurality of pinions. The shaft members 16.3, 15.3 of the drive roller 15.1 are input. A clamping device 25 for the upper pressing rollers 15.2, 16.2, 17.2 is additionally disposed on the rear side 18 of the substrate 11. It has a spring block 26 in which the three-pin torsion springs 27, 28, 29 are mounted. In addition, one A rail 30 coupled to a clamping rod 31 is movably mounted in the spring block 26.

In Fig. 3, the track 30 has been moved inward in the direction of the arrow by closing the clamping lever 31. Therefore, the cam 32 (as shown in FIG. 4) disposed on the track is pressed on the pin torsion springs 27, 28, 29, and the second script body of the pin torsion spring acts on the slide plates 33, 34, 35 respectively (as shown in the figure). 4). The slides 33, 34, 35 are thus pressed downwards.

In Fig. 4, on the other hand, the clamping lever 31 is opened, with the result that the rail 30 is moved outward in the direction of the arrow. Therefore, the cam 32 is no longer in contact with the pin torsion springs 27, 28, 29, and the sliders 33, 34, 35 are no longer pressed further.

As can be seen from Figures 5 and 6, the shaft members 15.4, 16.4, 17.4 of the press rolls 15.2, 16.2, 17.2 are individually mounted in the slide plates 33, 34, 35. In this case, the shaft members 15.4, 16.4, 17.4 pass through the opening 36 in the substrate 11 with clearance. If the slides 33, 34, 35 are not pressed down by the clamping device 25, the upper press rolls 15.2, 16.2, 17.2 are also moved downwards and thus the necessary contact with the drive rolls 15.1, 16.1, 17.1. pressure. However, if the clamping device 25 does not operate (Fig. 4), the upper pressing rollers 15.2, 16.2, 17.2 can be moved upwards by hand as long as the clearance between the shaft members 15.4, 16.4, 17.4 and the opening 36 is allowed.

10‧‧‧Drawing machine

11‧‧‧Substrate

12‧‧‧ front side

13, 14‧‧ ‧ motor

15‧‧‧Input roller pair

15.1, 16.1, 17.1‧‧‧ driven roller

15.2, 16.2, 17.2‧‧‧ upper pressure roller

16‧‧‧Aperture roller pair

17‧‧‧Output roller pair

Claims (14)

A draw frame for a knitting machine for producing a fiber structure, which is composed of a roving machine having a double apron guided to a apron roll (16) and an output roll pair (17), wherein the apron roll (16) and the output roller pair (17) individually has a press roller (16.2, 17.2) and an electric motor driven drive roller (16.1, 17.1), and the press roller (16.2, 17.2) and the drive roller (16.1) , 17.1) and the electric motor (13, 14) are disposed on the front side (12) of the substrate (11), and the motor shaft (13.1, 14.1) is connected through the substrate (11) and by the driving device (21, 22) a shaft member (16.3, 17.3) of the drive roller (16.1, 17.1) mounted in the substrate (11), characterized in that a clamping device (25) is provided on the rear side (18) of the substrate (11) By means of the clamping device, the pair of apron rollers (16) and the pair of rollers (16.2, 17.2) of the pair of output rollers can be pressed against the drive rollers (16.1, 17.1). The draw frame of claim 1, wherein the shaft member (16.4, 17.4) of the press roller (16.2, 17.2) is guided through the opening (36) in the substrate (11) with clearance and The clamping device (25) moves up and down in the opening (36). A draw frame according to claim 1 or 2, wherein the shaft member (16.4, 17.4) of the press roller (16.2, 17.2) is rotatably mounted on the rear side (18) of the substrate (11). In the slide plate (33, 34, 35), a spring force can be applied to the slide plate (33, 34, 35) by the clamping device (25). A draw frame according to claim 3, wherein each of the slides (33, 34, 35) has an associated torsion spring (27, 28, 29). Such as the draw frame of claim 3, wherein the clamping device (25) has a track (30) extending over the slide plate (33, 34, 35) and displaceably disposed on the substrate (11) whereby contact pressure can be generated. The draw frame of claim 5, wherein the track (30) is configured to be longitudinally displaceable on the substrate (11) and provided with a cam (32), wherein the cam (32) of the track (30) Acting on the torsion spring (27, 28, 29) that interacts with the slide (33, 34, 35). For example, the draw frame of claim 3, wherein the torsion spring (27, 28, 29) is a pin torsion spring. The draw frame of claim 3, wherein the torsion spring (27, 28, 29) is disposed in an adjustable spring block (26). A draw frame according to claim 1 or 2, wherein the clamping device (25) is actuatable by a manually operated clamping lever (31). For example, in the draw frame of claim 1 or 2, an input roller pair (15) is separately disposed on the substrate (11), and the pressing roller (15.2) can also be acted by the clamping device (25). . A draw frame according to claim 1 or 2 wherein the motor (13, 14) is protected from fiber flying by a removable covering. A draw frame according to claim 1 or 2, wherein the getter member is disposed on the pair of output rollers (17). A draw frame according to claim 1 or 2, wherein the rear side (18) of the substrate (11) is protected from fiber flying by a removable outer cover. A knitting machine having at least one draw frame according to one of claims 1 to 13 of the patent application.