摘要:
A gripper head for a loom is of lightweight construction and has a weft thread clamp with a stationary pad and a movable pad. The former is directly mounted to the gripper body. The latter is mounted through an adjustable spring to the gripper body, whereby the clamping force is adjustable.
摘要:
A warp thread control system for forming the loom shed as a first control section (1) and a second warp control section (16). The first section is equipped with at least one guide element (2) for guiding the leno threads (3) and a guide rod (4) carrying a multitude of passages 6 arranged and parallel to one another for guiding the ground threads (5). The second warp control section (16) includes a thread detour element (17) for detouring the leno threads (3) and a needle bar (18) carrying a multitude of needles (19) with needle eyes (19.1) for guiding the leno threads (3). Both the first warp control section (1) and the second warp control section (16) are positioned on the side of the reed facing the warp threads whereby the positioning may differ either above or below a weaving plane (28) or partially above and partially below the weaving plane (28). Preferably but not necessarily both warp control sections are driven by a common drive (11).
摘要:
A warp tensioning mechanism for a weaving loom is so constructed that a crossbar (8) that carries the tensioning mechanism is mounted at each end in the loom frame for a three-dimensional adjustment (5, 5A, 5B) vertically up and down, horizontally back and forth, and angularly about the longitudinal axis of the crossbar. After adjustments have been made, the crossbar is locked in position. The crossbar carries two sets of bearing brackets. One set (16) of bearing brackets holds a carrier beam in first bearings. The carrier beam in turn holds a warp tensioning roller (23) in second bearings (18). The second set of carrier brackets (16A) holds a warp guide roller (25) in third bearings (27).
摘要:
A controlled weft thread presenting and clamping arrangement minimizes weft thread waste and ensures proper tensioning of the weft thread during its presentation to the insertion gripper, in a gripper loom for weaving with plural different weft threads. The arrangement includes a control shaft (13) that has a drive key (14) protruding therefrom in a reference plane (7), and that is rotatably supported on a support bracket (10, 11, 12), which may be mounted on the loom. Weft thread presenting levers (15) each carrying a respective clamp (16) are movably arranged on the shaft (13), which passes through a hole in each of the presenting levers (15). A translational drive (22) acts on a presenting lever support (17) to translationally move all of the presenting levers (15) in unison together axially along the shaft (13) until a selected lever (15) is positioned in the reference plane (7), with the lever's drive groove 15B engaged on the drive key (14) of the shaft (13). A rotational drive (23) rotates the shaft (13), and therewith the selected thread presenting lever (15) via the drive key (14). A guide member (19) has a lengthwise groove (20) to allow all of the presenting levers (15) to move linearly therealong in unison, and a crosswise groove (21) in the reference plane (7) to allow only the selected presenting lever (15) to rotate in the reference plane. A thread back tensioning device (9) is arranged in the thread path to apply tension to the thread being presented to the gripper.
摘要:
A rotating leno forming device includes a leno disk (3) that has leno thread guides (5) therein and that itself forms a part of the rotor (2) of an electromagnetic drive arrangement. In order to achieve a very compact bearing support arrangement, shield the moving parts against external contamination, and provide for the detection of the rotational position of the leno disk, the leno device further includes a roller or ball bearing (6) of which the outer bearing race (6A) is rigidly connected to the leno disk (3), and of which the inner bearing race (6B) is rigidly connected to a centering holder (9) that is rigidly connected to a housing (8) of the leno device. Permanent magnets (7) are arranged around the circumference of the rotor (2) and cooperate with an electromagnetic stator (11) secured in the housing (8). A position sensor system (10) includes at least one signal emitter (13) mounted on the rotor (2) and a plurality of signal receivers or sensors (14) mounted on the housing (8).
摘要:
A leno device for tying weft threads in the selvage of a fabric is constructed as an electric motor in which the stator is connected to a mounting bracket and the rotor forms the leno rotor disk or ring. A very compact structure results that can be mounted in the free space between the longitudinal struts and heddles of the first heald shafts in the loom.
摘要:
A weft thread clamp for a weft thread presenting lever is positively actuated to selectively open or close the clamp and thereby release or hold the weft thread respectively. To achieve this, a second clamp element is movable or deflectable relative to a first clamp element of the clamp. The movable second clamp element may be directly embodied as an actuator, or may be driven by an actuating motion provided by an actuator located remotely from the clamp on the lever. In the latter case, a motion transmission arrangement such as a sheathed push-pull cable or a rod linkage operatively connects the actuator to the movable second clamp element. The actuator may be a piezoelectric, electromagnetic, hybrid pneumatic-electric, or hybrid hydraulic-electric device, or an electric motor. The loom control unit is connected to the actuator for providing control signals thereto.
摘要:
A multitude of heald shafts can be decoupled simultaneously as a set. For this purpose one of the two coupling sections (2, 3) of a shaft, either the section on the push rod side or the section on the shaft side, is equipped with a decoupling mechanism (11). All decoupling mechanisms (11) are power operated in unison by hydraulic, pneumatic, or electrical power. The power operated decoupling mechanisms operate a spring biased rocker lever (7) of a lever mechanism (6) to decouple the coupling sections from each other.
摘要:
The main nozzle of an air jet loom has an inlet end (7) where the weft threads are inserted into the main nozzle and exits (19) where the weft threads pass out of the main nozzle into the weft thread air insertion channel (20) of the reed (14). The inlet end (7) is supported by a spring elastic mounting which permits guided movements of the nozzle exits (19) in any direction in a plane extending perpendicularly to the weft thread insertion direction for properly aiming a nozzle exit into the air insertion channel.
摘要:
A rotating leno forming device includes a leno disk (3) that has leno thread guides (5) therein and that itself forms a part of the rotor (2) of an electromagnetic drive arrangement. In order to achieve a very compact structure, the components are so arranged to achieve an axially directed magnetic flux between the rotor (2) and an electromagnetic stator (10) arranged in the housing (8). A rolling contact bearing rotatably supports the leno disk (3), with a first bearing race (6A) connected to the housing (8) and a second bearing race (6B) connected to the leno disk (3). Permanent magnets (7) are arranged on an annular ring surface (3A) of the leno disk (3) extending along a radial plane, so as to face the electromagnetic stator (10) across an air gap (11) that extends on a radial plane. The thread guides (5) in the leno disk (3) face the stator (10) so that the leno threads (13A, 14A) constantly move through the air gap (11) preventing the accumulation of lint or fibers therein, during operation of the device. An iron yoke ring (3B) may be arranged to rotate with the leno disk (3) or to remain stationary with the stator (10), so as to provide a magnetic return or back circuit.