TW201510300A - Drawing equipment for a knitting machine - Google Patents

Abstract

Drawing equipment (10) for a knitting machine for the production of a fibre material from a roving, having double belts, guided via a pair of belt rollers (14, 15), and a pair of output pressure rollers (16, 17), the pair of belt rollers (14, 15 ) and the pair of output pressure rollers (16, 17) respectively having an upper pressure roller (15, 17) and a lower roller (14, 16) which is driven by an electric motor and the rollers (12 - 17) being disposed on the front-side (11.1) of a base plate (11), whilst the axles (26, 27, 28) thereof are guided through the base plate (11), and the drive means for the lower rollers (12, 14, 16) are disposed at least partially on the rear-side of the base plate (11), there being disposed on the upper roller (17) of the pair of output pressure rollers (16, 17) and on the upper roller (15) of the pair of belt rollers (14, 15), suction equipment (20) which extends over both upper rollers (15, 17).

Description

Drawing device for knitting machine

The present invention relates to a draw frame for a knitting machine for manufacturing a roving into a fiber material, the draw frame having a double belt, being guided via a belt roller, and a pair of output pressure rollers, the belt rollers and the pair The output pressure rollers respectively have an upper pressure roller and a lower roller, the lower rollers being driven by an electric motor, and the rollers are disposed on a front side of the seat plate, and the shaft is guided through the seat plate, and the same The drive mechanism for the lower roller is at least partially disposed on the rear side of the seat plate.

This draw frame is known from WO 2010/028513 A1. It has the purpose of producing a woven fiber material from a roving, and for supplying the fiber material directly to the needle of the knitting machine. In the case of these combined spinning machines, the conventional, crepe manufacturing system is therefore not required. Furthermore, a braid made of a woven fiber material having substantially parallel oriented fibers has a softer surface than a woven fabric made of crepe.

The draw frames of these spinning machines are subjected to fiber flying like a draw frame of a textile machine, which can cause contamination and operational disturbances. Especially fiber or resection The material can accumulate in the gap between the roller mounted to the seat plate and the seat plate and can cause interference in the operation of the draw frame. In the case of the conventional draw frame, the rear side of the seat plate is thus sealed in a gas-tight manner with the outer casing, and compressed air is introduced therein, the compressed air being guided through the bore in the seat plate a gap between the lower roller and the front side of the seat plate. The compressed air is thus capable of blowing the fibers located in the gap so that the fibers cannot become attached. However, the blown fibers can then become attached to other machine parts.

EP 0 532 457 A1 describes a draw frame for a textile machine in which the pair of rollers are mounted to float on a closed drive housing. The draw frame roller is covered by an outer casing that is open on the supply side of the roving. Compressed air is introduced into the drive housing and a draw frame roller that can flow through the opening into the open housing, the opening being provided for mounting the roller shaft in the drive housing. A suction device connected to the open outer casing via a hose connection is disposed outside the open outer casing. However, this suction device is greatly limited in its effectiveness because the hose connector opens into the open outer casing at a remote distance from the draw frame rollers. In addition, the structure of the draw frame is so large that the draw frame cannot be used in the case of a spinning machine.

It is an object of the present invention to provide a draw frame for a spinning machine that broadly avoids problems due to fiber flying and cutting material.

This purpose is achieved by a draw frame for a knitting machine for roving Manufacturing a fiber-forming material, the draw frame having a double belt, being guided via a pair of belt rollers, and a pair of output pressure rollers, the pair of belt rollers and the pair of output pressure rollers having an upper pressure roller and a lower roller, respectively The rollers are driven by an electric motor, and the rollers are disposed on the front side of the seat plate, the shafts of which are guided through the seat plate, and the drive mechanisms of the lower rollers are at least partially disposed at the seat On the rear side of the panel, a suction device is provided on the rollers above the pair of output pressure rollers and on the upper rollers of the pair of belt rollers, the suction device extending over the two upper rollers. In addition, a pair of input pressure rollers can be provided.

The draw frame according to the invention eliminates at least partial coverage of the outer casing of the draw frame roller and, in the region of the upper roller located closest to the output of the draw frame, instead uses a clear access to the position of the fiber fly. Suction device. The suction device thus extends over the two rollers. One of the upper rollers is a belt roller. The suction device therefore also has the function of cleaning the belts. Even the dust penetrating from the outside can be reliably removed by the draw frame with the suction device. By eliminating the outer casing covering the draw frame rolls, there is always free access to the maintenance operation and the check for checking the fibrous material. The installation space required for the draw frame is small so that it can be easily used by the spinning machine.

The mode of operation of the suction device is further optimized, at least in part, at its free end by a suction device that covers at least the output upper roller. The suction system is therefore even more intensely concentrated on the rollers. In addition, the partial lateral side coverage of the upper roller prevents detachment of the slack fibers and fluffs to the side.

Also in the case of the draw frame according to the present invention, the rear side of the seat plate can be At least partially covered by the outer cover member in an air impermeable manner, the outer cover member is provided with at least one supply opening for compressed air, and the seat plate may have a through opening for compressed air. Therefore, air can be guided by the rear side of the draw frame and through the opening in the seat plate to the draw frame roller, and can thereby reliably prevent the removal of material, fluff or dust in cooperation with the suction device. Attached.

It is particularly advantageous if the through opening in the seat plate is formed by an axial bore for the shaft of the upper roller, the upper roller shaft being guided through the axis with clearance To the hole. In this way, the compressed air directly passes into the narrow gap between the roller body of the upper roller and the seat plate, and the top portion also enters the corresponding gap between the lower roller body and the seat plate, and can Therefore, reliably maintaining these gaps does not accumulate fibers or dust.

At least one nozzle for receiving the draw fiber material can be disposed after the pair of output rolls, and a degree of twist can be imparted to the fiber material with the nozzles. In this embodiment of the draw frame, it is advantageous if the suction device absorbs the fibrous material when the at least one nozzle is clogged. The fibrous material therefore cannot become congested in the draw frame and cause contamination or even damage to the draw frame.

Furthermore, it is also possible for the system to cover the front side of the seat panel at least in the region of the housing cover. This is especially advantageous when the drive motor for the lower rollers is also in the same position on the front side of the seat plate and is covered by the outer casing and thus protected from contamination.

10‧‧‧Drawing machine

11‧‧‧ seat board

11.1‧‧‧ Front side

12‧‧‧Input pressure roller

13‧‧‧Input pressure roller

14‧‧‧Belt roller

15‧‧‧Belt roller

16‧‧‧ output roller

17‧‧‧ output roller

18‧‧‧Nozzles

19‧‧‧Transportation pipe

20‧‧‧Suction equipment

20.1‧‧‧ lower

21‧‧‧Cover cover

22‧‧‧Supply opening

23‧‧‧through opening

24‧‧‧through opening

25‧‧‧through opening

26‧‧‧ shaft

27‧‧‧ shaft

28‧‧‧ shaft

In the following, preferred embodiments of the draw frame according to the invention are described in more detail with reference to this illustration.

1 is a view of the front side of the draw frame; FIG. 2 is an enlarged detailed view of the draw frame of FIG. 1; FIG. 3 is a draw of the draw frame roller and the draw frame of FIG. Figure 4 is a perspective view of the draw frame of Figure 1; Figure 5 is a detailed view of the lower and upper roller shafts of the draw frame of Figure 1; Figure 6 is the upper roller shaft of Figure 5 A magnified detailed illustration.

The draw frame 10 of Figure 1 has a plate 11 with a pair of input pressure rollers 12, 13, a pair of belt rollers 14, 15 and a pair of output rollers 16, 17 also disposed on the front side 11.1 of the seat plate to float . Between the pair of rollers 12, 13, 14, 15 and 16, 17 in this case, the lower rollers are respectively driven by a motor, and the rovings which are not shown in more detail here are drawn to each other based on the rollers 12, 13, 14, 15, 16, and 17 are formed at different rates to form a fibrous material. A nozzle 18 having a transport tube 19 is provided at the output of the pair of output rollers 16, 17, the output rollers of which direct the fibrous material to a braiding machine, preferably a circular braiding machine, not shown here. Furthermore, the suction device 20 is disposed on the front side 11.1 of the seat plate 11, And extending over the pair of output rollers 16, 17 and the upper rollers 17 and 15 of the pair of output side belt rollers 14, 15. It is thus capable of absorbing fluff, dust and cutting material which are produced when the roving is spliced during the manufacture so that the particles cannot be deposited at different locations in the draw frame.

It can be found in particular from the enlarged detailed view in Fig. 2 that the suction device 20 also overlaps the output upper roller 17 on this side, so that even the fibers or fluff appearing laterally can be reliably captured.

Furthermore, it is apparent from the cross-sectional image in Fig. 3 that the suction device 20 is provided such that when the nozzle 18 is clogged, the resulting fiber bundle can be reliably sucked away by the suction device 20. . For this purpose, the lower portion 20.1 of the suction device 20 directly adjoins the nozzle 18.

Figure 4 shows the rear side of the seat panel 11 which is completely covered by the housing cover member 21. A supply opening 22 for compressed air is disposed in the housing cover member 21.

As illustrated in Figures 5 and 6, the compressed air flows from the rear side of the seat plate 11 through the through openings 23, 24 and 25 of the shafts 26, 27, 28 for the upper rollers 13, 15, 17 Front side 11.1 (see Figure 1).

Figure 6 illustrates, in an enlarged illustration, a circular through opening 23 for the shaft 26 of the output upper roller 17. Like the other shafts 24, 25, the shaft 26 is also guided through the associated through opening 23 with clearance so that the upper rollers 13, 15, 17 can be subjected to a failure not described in more detail herein. The clip device is movably resistant to the lower rollers 12, 14, 16.

10‧‧‧Drawing machine

11‧‧‧ seat board

11.1‧‧‧ Front side

12‧‧‧Input pressure roller

13‧‧‧Input pressure roller

14‧‧‧Belt roller

15‧‧‧Belt roller

16‧‧‧ output roller

17‧‧‧ output roller

18‧‧‧Nozzles

19‧‧‧Transportation pipe

20‧‧‧Suction equipment

Claims (8)

A draw frame (10) for a knitting machine for manufacturing a roving into a fiber material, the draw frame having a double belt, via a pair of belt rollers (14, 15), and a pair of output pressure rollers (16, 17) being guided, the pair of belt rollers (14, 15) and the pair of output pressure rollers (16, 17) respectively have an upper pressure roller (15, 17) and a lower roller (14, 16), and the lower roller is borrowed Driven by an electric motor, and the rollers (12-17) are disposed on the front side (11.1) of the seat plate (11), and the shafts (26, 27, 28) are guided through the seat plate (11) And the drive mechanism for the lower rollers (12, 14, 16) is at least partially disposed on the rear side of the seat plate (11), characterized in that the suction device (20) is disposed at the pair of output pressures On the rollers (17) above the rollers (16, 17) and on the upper rollers (15) of the pair of belt rollers (14, 15), the suction device extends over the two upper rollers (15, 17). The draw frame of claim 1, wherein the draw frame has a pair of input pressure rollers (12, 13). A draw frame according to claim 1, wherein the suction device (20) covers at least the output upper roller (17) at least at its free end. The draw frame of claim 1, wherein the rear side of the seat plate (11) is at least partially covered by the outer cover member (21) in a gas-tight manner, the outer cover member being provided for compression At least one supply opening (22) of air, and wherein the seat plate (11) has a through opening (23, 24, 25) for the compressed air. The draw frame of claim 4, wherein the through openings (23, 24, 25) are used by the shafts (26, 27, 28) of the upper rollers (13, 15, 17) An axial bore is formed through which the upper roller shafts (26, 27, 28) are guided with clearance. A draw frame according to claim 1, wherein at least one nozzle (18) for receiving the fiber material of the draw is disposed after the pair of output rollers (16, 17). The draw frame of claim 6, wherein the suction device (20) absorbs the fibrous material when the at least one nozzle (18) is clogged. The draw frame of claim 1, wherein the front side (11.1) of the seat panel (11) is covered by the outer cover member at least in a certain area.