摘要:
A gear drive for a shuttleless loom is equipped with a coupling device or clutch between an input first gear group (G1) and an output second gear group (G2). The coupling or clutch provides a form-locking connection between the two gear groups which convert a continuous rotational movement on the input side into a back-and-forth movement on the output side to drive, for example, a gripper rod for the insertion of the weft thread into the loom shed. The coupling device or clutch can be rapidly operated by an electromagnet or by an electric motor and greatly facilitates performing the operations that are, for example, necessary for repairing a broken weft thread.
摘要:
The apparatus contains a ribbon wheel driven in alternating direction of rotation with a flexible insertion ribbon being wound and unwound in a first looping region of the ribbon wheel and lappable over more than 360.degree. of the circumference. A ribbon type guide element loops the portion of the insertion ribbon present on the ribbon wheel. The insertion ribbon and the guide element are each fastened at one end in a trough-like depression of the ribbon wheel by a recessed clamp which has a support surface adapted to the adjacent surface portions to be lapped and ascending in a circumferential direction in a continuous arc. The other end of the guide element is fastened by a second clamp disposed in the same or another depression.
摘要:
A control device for actuating the weft carriers attached to opposed flexible tapes in a shuttleless loom. One end of each tape is attached to a driving arm with the opposite ends of the latter being fixed on oscillatably driven hub members. One side of each hub member has a disc element mounted thereon for movement therewith. The periphery of the disc members are disposed in operative association with the ends of the driving arms to which the tapes are attached and define platforms onto which the tapes are wrapped and unwrapped during their withdrawal from and insertion into a shed of warp threads by the driving arm.
摘要:
Weaving machine with weft supplied from spools located outside the shed, has at least one weft inserter actuated by a driving wheel which is driven in a reciprocal movement of rotation, and further includes, for the control of the driving wheel, a toothed belt in cooperating relation with a pulley which is coupled with the driving wheel, and a driving system coupled to the belt in order to impart a reciprocal movement thereto.
摘要:
An improved tape wheel for shuttleless looms having an expansion joint formed in the rim thereof for the purpose of preventing expansion of said rim in a radial direction when subjected to the heat generated by a flexible tape which during the performance of its intended function is continuously being wrapped about and thence extended from said rim.
摘要:
A device for driving and guiding a rapier of a weaving machine, comprises a rotatable drive wheel (1) provided for driving a rapier rod (14) in a back and forth movement and a guide channel formed by adjustable guide bodies (10), (11) in order to guide the said rapier rod (14) according to a guide path in co-operation with the drive wheel (1). The guide bodies (10), (11) are part of a guide unit (9) which, as a whole, is adjustable in order to modify the distance between the guide path and the rotation shaft (2) of the drive wheel (1), and where the drive wheel (1) is continuously adjustable in the longitudinal direction of its shaft (2). With this device the clearances of the rapier rod with respect to the drive wheel can be performed easily, rapidly and with great precision, so that this device is able to work with a minimum development of heat and wear.
摘要:
A loom is equipped with a pneumatic slide bearing for guiding and supporting a weft insertion gripper carrier, which may be a rigid rapier rod or a flexible band. The pneumatic slide bearing supports and guides the weft gripper carrier in a nearly friction-free manner. The pneumatic slide bearing includes a bearing body (1) that is pivotally mounted on a bolt (3) and that extends along the lengthwise direction of the rapier rod (12) or around the circumferential direction of the flexible band (21). The bearing body (1) has an air channel (5) therein, and has a plurality of transverse holes (6) passing from the air channel out through a side wall. A bearing plate (8) with a plurality of transverse holes (9) therethrough is removably mounted along the side wall of the bearing body (1) so that the transverse holes (9) align with the transverse holes (6). The outlet ends of the transverse holes (9) are enlarged to form respective air pockets (10), which together serve to form a homogenous and stable air cushion between the rapier rod and the bearing plate (8). Removable air nozzles (11) may be screwed into the transverse holes.
摘要:
A combination of a sprocket wheel and a rapier band employed in a rapier loom is improved for extending the service life of the rapier band. Each of the female holes formed in the rapier band for receiving teeth of the sprocket wheel is formed in a frustum-like shape. The teeth of the sprocket wheel have tooth surfaces each including a non-interference portion located above an expansion/contraction-insusceptible layer of the rapier band and an interference portion located underneath the expansion/contraction-insusceptible layer. The non-interference portions do not contact the tooth surfaces, while the interference portions are brought into contact with the wall surfaces of the hole formed in the rapier band when the band is wrapped around the sprocket wheel. Each non-interference portion has a curved surface generated by an involute curve, while each interference portion presents a curved surface which matches the shape of the corresponding wall surface of the female hole formed in the rapier band in the wrapped state thereof.