Linear knitting machine

Abstract

The present invention relates to a linear knitting machine comprising: a first (2) and a second (3) needle-bed, each one having at least one bar (4) extending longitudinally along said machine, and at least one row of needles (5) supported by the bar (4); a plurality of thread-guides (10) for arranging at least one respective thread into the needles (5); a motor (11) for moving at least one bar (4) of every needle-bed (2, 3) with a forward and backward motion getting away from/towards the thread-guides (10); and motion transmission means (12) associated to the bar (4) of every needle-bed (2, 3) and having at least one rotating element (14) for every needle-bed (2, 3) associated to the motor (11), and a rod (13) for every needle-bed (2, 3) having a first end (13a) stiffly engaged to said bar (4) and a second end (13b), opposed to the first one (13a), operatively associated to said rotating element (14) which is provided with at least one cam guide (16).

Description

The following is a description of a preferred but not exclusive embodiment of a linear knitting machine according to the invention to an indicative and nonlimiting purpose, as is shown in the accompanying drawings, in which:

FIG. 1 shows a schematic view in lateral elevation, some parts being removed so as to better show others, of a knitting machine according to the present invention;

FIG. 2 shows a schematic view in front elevation, some parts being removed so as to better show others, of the knitting machine according to the present invention;

FIG. 3A is a view in lateral elevation of a constructive detail of the machine shown in FIGS. 1 and 2 according to a first execution variant;

FIG. 3B is a view in lateral elevation of a constructive detail of the machine shown in FIGS. 1 and 2 according to a second execution variant;

FIG. 4 is a plan view of another constructive detail of the knitting machine;

FIG. 5 is a schematic view in lateral elevation of a lower portion of the knitting machine;

FIG. 6 shows a schematic view in lateral elevation, some parts being removed so as to better show others, of a knitting machine according to an alternative embodiment with respect to the one shown in FIG. 1;

FIG. 7 shows a section of FIG. 6 along lines VII-VII.

Claims

1. A warp linear knitting machine comprising: a first (2) and a second (3) needle-bed, each one having at least one bar (4) extending longitudinally along said machine, and at least one row of needles (5) supported by said bar (4);a plurality of thread-guides (10) for arranging at least one respective thread into said needles (5);a motor (11) for moving said at least one bar (4) of every needle-bed (2, 3) with a forward and backward motion getting away from/towards the thread-guides (10); andmotion transmission means (12) associated to said at least one bar (4) of every needle-bed (2, 3) and having at least one rotating element (14) for every needle-bed (2, 3) associated to the motor (11);

2. The machine according to claim 1, characterized in that said rod (13) of every needle-bed (2, 3) has a stiff shape and a longitudinal development basically parallel to a forward-backward direction of movement (A) of said rod (13).

3. The machine according to claim 1, characterized in that said transmission means (12) further comprise: a transmission pulley (22) associated to a gear and to said motor (11); at least one connection element (24) for every needle-bed (2, 3), associated to said gear of said pulley (22) for rotating around a respective axis; and at least one rotating shaft (21) having a first end (21a) fitted onto the connection element (24), and a second end (21b) opposed to the first one (21a) interference fitted onto the rotating element (14).

4. The machine according to claim 1, characterized in that said rotating element (14) comprises at least one cam disc (15) turning around a respective axis (X), said at least one cam guide (16) being defined on said cam disc (15).

5. The machine according to claim 4, characterized in that said second end (13b) of the rod (13) comprises a roller (18) sliding inside said cam guide (16) obtained in said cam disc (15); said cam guide (16) having a shape developing around the axis of rotation (X) of said cam disc (15).

6. The machine according to claim 4, characterized in that said cam disc (15) has at least two cam guides (16) so as to define two discrete tracks (31a, 31b), and in that said second end (13b) of the rod (13) comprises at least two movement bearings (30) for sliding in each of said two tracks (31a, 31b), respectively.

7. The machine according to claim 1, characterized in that every needle-bed (2, 3) further comprises at least one bar (9) holding stitch-combs (8) basically parallel to the bar (4) supporting said row of needles (5); each bar (4, 9) being stiffly associated to at least one respective rod (13).

8. The machine according to claim 1, characterized in that every needle-bed (2, 3) further comprises at least one bar (7) holding latches (6) basically parallel to the bar (4) supporting said row of needles (5); each bar (4, 7) being stiffly associated to at least one respective rod (13).

9. The machine according to claim 4, characterized in that every rotating element (14) includes at least two cam discs (15) coaxial to one another and fitted onto the respective rotating shaft (21).

10. The machine according to claim 1, characterized in that every bar (4, 7, 9) of every needle-bed (2, 3) is stiffly associated to two respective rods (13) housed on opposite ends of said bar (4, 7, 9).

11. The machine according to claim 10, characterized in that it comprises two rotating elements (14) for every needle-bed (2, 3), each of them being arranged on opposite ends of said bars (4, 7, 9) so as to be associated to the rods (13) engaged to the bar (7) holding the latches (6), to the bar (9) holding the stitch-combs (8) and to the bar (4) supporting said row of needles (5), respectively.

12. The machine according to claim 11, characterized in that it further comprises two box-shaped bodies (17) arranged on respective opposite ends of said bars (4, 7, 9) and each one containing at least two rotating elements (14), each of them being associated to a respective needle-bed (2, 3).

13. The machine according to claim 12, characterized in that said connection elements (24) include respective gears (24a) engaged on opposite sides of said gear of said pulley (22) for rotating in opposite directions.

14. The machine according to claim 12, characterized in that said rotating elements (14) housed within a respective box-shaped body (17) are adjacent to one another for turning around corresponding parallel axes (X) and in the same or opposite directions; every rotating element (14) having a first (15a) and a second (15b) cam disc coaxial to and spaced away from one another, at least one of said cam discs (15a, 15b) of a rotating element (14) being housed between two cam discs (15a, 15b) of the adjacent rotating element (14).

15. The machine according to claim 14, characterized in that said first cam disc (15a) comprises an active surface facing said second cam disc (15b) and having said cam guide (16); said second cam disc (15b) having two opposite active surfaces, each of them having a cam guide ((16).

16. The machine according to claim 15, characterized in that said cam guide (16) comprises a recess on the corresponding active surface of a respective cam disc (15a, 15b).

17. The machine according to claim 16, characterized in that said motor (11) is arranged between the opposite ends of said bars (4, 7, 9); said transmission means (12) including two rotating shafts (21) for every needle-bed (2, 3) extending on opposite sides of the motor (11) and each of them being associated to a rotating element (14) arranged in the respective box-shaped body (17).

18. The machine according to claim 17, characterized in that every shaft (21) comprises: at least one first portion (25) near the motor (11) and engaged to a respective connection element (24), and a second portion (26) associated to the respective rotating element (14); and a connection joint (27) for joining said first and second portion (25, 26) coaxially to one another.

19. The machine according to claim 1, characterized in that it further comprises guide means (19, 29) operatively acting upon said rods (13) for preventing said rods (13) from deviating from the direction of movement (A).