摘要:
Improvements are made to members of a loom dobby control unit so as to allow structural separation between the reading unit and control unit. For this purpose, the reading unit rockers operate on the control unit by simple bearing and thrust contact with the horizontal needles which control the hook lifting rods. Moreover, the lifting blades for said rods are controlled together with the hook lowering plates by the motion of shafts which control the dobby knife oscillations.
摘要:
An apparatus for controlling a dobby in which reading needles read a punch card and each needle influences the movement of a respective heddle frame. Two outer disks having annular toothed portions arranged on the axial facing sides thereof which face one another are secured on the shaft of a punch card drive cylinder. The teeth of the toothed portions are angularly offset by one-half the tooth pitch. Between the two outer disks, and freely rotatably supported on the shaft is a central disk with annular toothed portions on the axially facing sides thereof which are also offset by one-half the tooth pitch. A movable guide member for the reading needles is secured on and driven reciprocally by the central disk. Upon indexing the pattern card for one pick, the toothed portion of one outer disk moves the central disk toward the second outer disk and effects engagement of the facing toothed portions on the central disk and the second outer disk. Through the movement of the central disk, the guide member and thus the reading needle are moved so that the needle reads the following pick from an adjacent row of control points on the card.
摘要:
In a card reading apparatus of a Dobby machine, necessity of intermittent driving of a paper card and release of a feeler needle for the intermittent driving is eliminated, and at a continuously driven state of the paper card instructions of fabric weave may be smoothly and securely transmitted to a Dobby driven part, thus operation speed of a Dobby machine is improved.
摘要:
A card switching apparatus for a dobby comprises a bracket mounted for rocking motion around a shaft, a cylinder supported on said bracket and having a rotary shaft, a gear securely mounted on said rotary shaft of said cylinder, an input power shaft, another gear securely mounted on said input power shaft, and an idle gear interposed between the two gears, and that said idle gear has a rotary shaft which is supported for movement along a particular locus and which is moved in response to a rotational angle of a motor shaft.
摘要:
In a feed device for the punched paper tape carring the coded fabric design for loom shed formation dobbies, the punched tape roller spindle can be disengaged from one of its end supports and can rotate with the other of said supports to enable the punched tape to be fitted, replaced or extracted, without interrupting the connection between the drive means and punched tape roller.
摘要:
The invention provides improvements in the members of a loom dobby reading unit, which enable the reading unit and control unit to be structurally separated. For this purpose, the reading unit rockers act on the control unit by simple bearing and thrust contact between a tappet provided on the rockers and the horizontal needles for the lifting rods of the control unit hooks. In addition, there are provided a very rigorous guide for the reading unit rocker movements, an improved mechanism for controlling the lowering movements of the rocker thrust rods, and an improved mechanism for controlling the pressure bars, said mechanisms both using precise cam controls.
摘要:
Reading system for a pattern card used to control a dobby. The reading needle extends through guide means which are caused to reciprocate in a direction parallel with the path of movement of the pattern card and to do so in such relationship to the movement of the needles toward and away from the pattern card that when the needles engage the pattern card they are moving with it at the same speed as the pattern card and when they are retracted they are returned to the place of beginning. Thus, it is possible to move the pattern card continuously at a constant speed or a speed coordinated to the guide moving means. Thus damage otherwise occurring at the sprocket openings of the pattern card is diminished and the tendency for the needles to punch or mar the pattern card by their points is also diminished.