Textiles: weaving – Miscellaneous – Loom cleaning
Patent
1986-09-16
1988-02-16
Hornsby, Harvey C.
Textiles: weaving
Miscellaneous
Loom cleaning
139 1R, 139336, D03D 5108
Patent
active
047248726
DESCRIPTION:
DESCRIPTION
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 4 show an embodiment example of a weaving machine comprising a warp let-off device 2, a fabric take-off device 4, a shedding device 6, a main drive 8 with a drive motor, a reverse switching gear unit 10, which is connected with the warp let-off device 2 and the fabric take-off device 4, and an electronic control device 12 for a weaving program. A weaving reed 14 and a filling yarn inserting member 16 are connected to the main drive 8 in a manner known, for example, from CH-PS No. 633 331 and not shown in more detail.
The warp let-off device 2 contains a warp beam 18 whose shaft 20 is driven by means of a worm gear unit 22. The warp yarns 24 reach from the warp beam 18 via a back rest 26 to the shafts 28 with the yarn guiding eyelets 29 of the shedding device 6 which serve to form and change the warp shed 30. The filling yarn inserting member 16 periodically engages in the warp shed 30. The inserted filling yarn is beaten up at the selvage 32 by means of the weaving reed 14. The woven fabric 34 is tensioned and taken off via the tension beam 36 and is rolled up on the fabric beam 38. The fabric take-off device 4 containing the tension beam 36 and the fabric beam 38 is driven by means of a regulating gear unit 40.
For the drive of the warp let-off device 2, the fabric take-off device 4 and the shedding device 6, a secondary drive shaft 46 is connected to the main drive 8 via bevel wheels 42, 44. This secondary drive shaft 46 carries a toothed wheel 48 which drives a drive wheel 52 for the warp let-off device 2 and the fabric take-off device 4, as well as a drive wheel 54 for the shedding device 6, via a toothed belt 50.
The shedding device 6 contains a dobby 56, whose drive shaft 58 is connected with the drive wheel 54, possibly with the intermediary of a switching coupling 60. The dobby 56, which is constructed and controlled, for example, according to EP-OS No. 0 056 098 and EP-OS No. 0 068 139, has shaft rockers 62 which are connected in each instance with a shaft 28 via a lever gear 64. Another type of shedding device with single strand control, e.g. according to DE-OS No. 33 01 931, can also be used.
The drive wheel 52 for driving the warp let-off device 2 and the fabric take-off device 4 is connected with a drive shaft 66 via the reverse switching gear unit 10, which is constructed as overlapping gear unit, the drive shaft 66 drives the worm gear unit 22 of the warp let-off device 2 on the one hand and the regulating gear unit 40 of the fabric take-off device 4 on the other hand. The drive wheel 52 is arranged at a bearing sleeve 68, see FIG. 4, which is supported on the drive shaft 66 so as to be freely rotatable. The bearing sleeve 68 projects into a housing 70 and carries a toothed wheel 72 with which a planet wheel 74 meshes. The latter is arranged at a shaft 76 so as to be fixed with respect to rotation relative to it; the shaft 76 is rotatably supported in a planet carrier 78 which is in turn rotatably supported on the drive shaft 66. At the shaft 76, on the other side of the planet carrier 78, another planet wheel 80 is connected with the shaft 76 so as to be fixed with respect to rotation relative to it. The second planet wheel 80 meshes with a toothed wheel 82 which is arranged at the drive shaft 66 so as to be fixed with respect to rotation relative to it. The planet carrier 78 is constructed as a worm wheel and contains at its circumference a worm toothing 84 which cooperates with a worm wheel 86 whose drive shaft 88 is connected with an auxiliary motor 90. The worm gear unit, which is formed from the worm toothing 84 and the worm wheel 86 is preferably constructed so as to be self-locking. Moreover, as shown in FIG. 3, the reverse switching gear unit 10 is equipped with a brake device 92 for preventing an after-running. The brake device 92 comprises a friction disk 94 which is arranged on the drive shaft 88 so as to be fixed with respect to rotation relative to it and a friction disk 96, which is arranged in the housing 70 so as to be fixed w
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patent: 4448220 (1984-05-01), Zwiener et al.
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patent: 4570681 (1986-02-01), Wada
patent: 4659051 (1987-04-01), Speich
patent: 4669510 (1987-06-01), Speich
Hornsby Harvey C.
Machoga Joseph S.
Textilma AG
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