SU1219688A1 - Double-rise loom dobby - Google Patents

Description

The invention relates to textile engineering, in particular, to the design of a shed forming loom, and can be used to fabricate multi-layer fabrics.

The aim of the invention is the expansion of technological capabilities.

FIG. a kinematic carriage diagram is shown. {, in FIG. 2, a carriage, side view; on fig.Z installation of knives average pharynx; 4 is a diagram of the resulting sheds.

The carriage is driven from the middle shaft 1 of the loom. For this purpose, a crank 2 is fixed at the end of the shaft, with a slot at the end into which the spindle 3, which is connected to the thrust 4, is inserted. The upper end of this rod is pivotally connected to the rod 5, which is connected to the connecting rod b. From this connecting rod, tt 7 and 8 move the upper 9 and lower 10 main knives of the upper branch of the pharynx to motion, with which additional knives of the middle branch of the pharynx are connected via rods 1 (fig. 3) coming from them. With the upper knife 9 — an additional knife 12, and the lower one — a knife 13. The additional knives are fixed on the threaded rod with nuts 14 and 15. The main and additional knives with their projections move in the slots of the carriage skeleton, and their movement is made in. opposite sides. When moving to the left, knives 12 and 9 or 13 and 10 grab hooks 16 or, 17, move them and their associated balances 18, which, in turn, move cranes 19 and the shafts 2 connected to them through heavy sleeves 20 1. Each time a duck is pushed into engagement with the knives, only those hooks, whose shafts must be lifted according to the pattern of the interlacing, are inserted from the 22 or 23 cartons mounted on prisms 24 and 25 rotating in bearings mounted on the yoke. 26 receiving his oscillatory motion by means of Shunting mechanism 27 from the main shaft 28 of the loom, the speed of which is twice the speed of the middle shaft. Prisms, located on the rocker arm 26, are connected to each other through a chain transmission

29, and at the same time on the prism axis 30 (Fig. 2) there is a ratchet 31 against which the pawl 325 is mounted on the connecting rod 6, imparting movement to both prisms. To fix the correct position of the prisms with respect to the counterweights 33, an asterisk 35 is fixed at the other end of the roller 34, having

we carry grooves on the number of faces of the prism. The end of the lever 36 is pressed against the sprocket by a coil spring attached to a carriage frame (not shown). Lever rotates

at the end of the prism axis 30 and during the insertion, the weft holds the asterisk, not allowing the prisms to turn. A handwheel 37 serves to rotate the prisms by hand.

The carriage works as follows.

When the middle shaft rotates, the crank transmits motion through the crank 4 to the crank 6. When it rotates, the knives 7 and 8 connected to it by the drivers 7 and 8 receive a reciprocating movement in the slot of the carriage frames. While the lower knife moves inside the carriage, the upper double knife moves in the opposite direction, and vice versa. When swinging the crank 6, the pawl 32 is connected to it, with each turn of the middle shaft 1, the ratchet turns 31 ns one tooth. Together with

the prism 25 rotates with a ratchet and, connected to it by a chain transfer 29, the prism 24 places next cards under the counterweights 33. So one turn of the prism

corresponds to two revolutions of the main shaft or two passes of the weft. The mechanism for controlling the weave pattern works as follows (Fig. I and 2). At first it acts on the counterweights 33

Prism cardboard 24. Cardboard cardboard

raise long shoulders counterweights. At the same time, the short shoulders of the counterweights are lowered, and along with them. Hooks that interact

with these counterweights; lower 17 directly, and upper through needles. The lowered hooks are in the line of movement of the knives. Thus, under the action of knives hooks begin

move and pull one of the shoulders of balance 18 at the same time. At the same time, the cranes 19 associated with it begin to turn counter-clockwise,

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which, using flexible couplings 20, begin to raise the corresponding shafts 21. Then, the second cardboard located on the prism 25 interacts. This interaction is due to the fact that when the middle shaft turns 1 by 1 / A turn due to the higher speed, the main shaft 28 will turn 1/2 turn and, due to the crank shaft tun.anism 27, the right shoulder of the rocker arm 26 will lift and the pegs of the cardboard 23 will act on the counterweights and thereby place the next part of the hooks on the line of the second knives 12 or 13. Distance The interface between the main and additional knives is chosen so that when coupling the hooks with additional knives, the required 5 mm is needed and, in addition, the path of the first knife (main) is exactly twice as long as the additional one. This distance between the knives is adjusted by bringing them closer or apart. Because of the different paths the knives go through, the shafts associated with them are also raised by a different amount, and those associated with the main knife will rise twice as much as additional. Thus, we obtain a double pharynx, where the upper branch of the pharynx is formed by the main knives, the middle one (common for two sheds) is due to the additional ones, the bottom one is due to the springs, which lower the heatsinks (the resulting view of the pharynx is shown in Fig.4). After opening the throat and laying the weft threads, the backward movement of the knives occurs. Under the action of the springs 45 the shafts are lowered. At the same time, the cranes are rotated so that the hooks, without rubbing against the blades, return to their original condition. For subsequent rotation of the main shaft of the machine occurs

6884

next yawning. In this case, if during the first revolution of the main shaft, the cranes were rotated by the upper hooks and knives, then for the second rotation their movement occurs due to the lower hooks 17 and the knives 10 and 13. The hooks are controlled in a similar way, i.e. first, the cardboard of the prism 24 acts, then the prism 25. Then the cycle of movement of the working bodies of the carriage is repeated. When the hooks approach the initial position, the knives move away from them, thereby creating free movement of the hooks in the vertical direction and

allowing the knives to be lowered to the corresponding hooks according to the interlacing pattern.

The formation of a double pharynx with an equal position will be considered using the projection of the pharynx on the vertical plane using the example of eight shafts (figure 4). Depending on the interlacing pattern given

5 cardboard primary and secondary prisms, each hedges here can occupy three fixed positions, i.e. located in the upper, middle or lower, thereby forming the upper, middle or lower branches of the pharynx. So, in our example, the first shank (FIG. 4a) forms the upper branch of the pharynx, in FIG. 4b it already forms the lower branch. Or the fifth hem (figa) is the upper branch of the pharynx, and in fig 4b is the middle branch. Thus, the upper pharynx can occupy the position of the lower and vice versa.

In comparison with the known device .Q, the proposed carriage allows to expand the technological capabilities of the shed forming mechanism by forming a double shed on the machine using a controlled machine, a location, to improve the formation of multilayer fabric.

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Remizki 8 1 V 5 H 3 g 1

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I I I I I I

Editor P.Kossey

Compiled by T. Gavrilova

Tekhred L. Oleynik Proofreader A. Obruchar

1238/38 Circulation 425 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch Ш111 Patent, Uzhgorod, st. Project, 4

Claims (1)

TWO-LIFT YAW-FORMING CARRIAGE OF THE WEaving MACHINE, containing two groups of upper and lower hooks, connected by means of balances, cranes and flexible links with the remixes of the loom, and knives of the upper branch of the throat kinematically connected to the middle shaft of the machine by the number of hook interaction groups and the number of hooks with hooks controlled by a lever system from the cardboards of two prisms of program carriers, the rotation mechanism of one of which is ratchet, characterized in that, in order to expand technological possibilities, it additionally has for each group of hooks one knife of the middle branch of the throat and a rocker kinematically connected to the main shaft of the machine, with the prisms mounted at the ends of the beam, the knives of the middle branch of the throat of each group of hooks mounted to adjust their position relative to the knives of the upper the branches of the pharynx are interconnected by means of a hinged four-link, and the dog of the ratchet mechanism is pivotally connected to the connecting rod of the four-link. SU. „. 121968 t ί 12