DE516839C - Device for separating the weft threads on looms with shuttle change - Google Patents

Description

Device for cutting the weft threads on looms with shuttle change The invention relates to a device for severing the weft threads on looms with change of shooter. In known devices of this type, the separation takes place the weft threads on the stretch between the fabric edge and the shooter box only in a single place. This is done, for example, by means of lifters. It is also known to let the separation be done by a cross cord that from the riser box is lifted against the load of the weight. With these known devices but not all fabrics can be produced, as neither the jack nor the climbing box give a sufficient lift to the weft threads with simultaneous processing of Insulate left and right wire at this height. The stroke is only sufficient for example to create career work.

In contrast, the invention shows a device by means of which it Above all, it is possible to use special fabrics, which are mainly used in the worsted yarn branch can be found and appear in stores under the name "crepon". For this purpose, according to the invention, the weft threads on the route between the fabric edge and the contactor box separated from each other in several places, that several cross cords to hold the weft thread by spring action on the Weaving web pulled and for the purpose of letting this weft thread pass under a string can only be lifted against the spring action. In order to have a sufficient stroke of the cross cords when connected to vertical box interchangeable chairs lifting cord controlled from the riser box is achieved by Interposition of a roller lever pressed against the cord pull by the climbing box the stroke increases.

The invention eliminates the disadvantage that the left and twisted weft threads to the side of the fabric edge. The weft threads Rather, they are safely separated from each other, and it becomes the production of a flawless one Tissue reached. The device can be used with both turret and Steigkastenw echairs are used and is located in the trunk above the loading lid attached to the bill of exchange side. This way, crepe fabric can work on both mentioned types of looms are manufactured. The shot becomes a zinc and a right wire used. Come these two differently twisted weft threads to lie together on the weaving web during the weaving process, so devour they are very easy. This makes the weaving process much more difficult and the fabric faulty. The device according to the invention overcomes these difficulties by that the weft threads on the route between the fabric edge and the shooting box at. several places from each other be separated so that a twisting or devouring is avoided.

The invention also has the advantage over the known devices, that they attach themselves easily to both the riser box and the revolver loom leaves.

The device according to the invention is in two embodiments shown in the figures, namely Fig. i shows a side view of the device am Revolverstuhl, and A.bb. a shows a corresponding side view located further forward on the crossbar attached in front of the sley track.

Fig. 3 is a second side view of the device on the vertical box changing chair. Fig. 4 is a corresponding forward side view of the one in front of the Sliding track attached cross bar.

When setting up the turret interchangeable chair (Fig. I and z) it is assumed that that the changing device is to the left of the weaver stand.

i is the revolver, z is a plate at the top end of the sley stilt can be screwed on, and 3 is a crossbar that is attached to the sley shaft or the Sley web is firmly attached. A cord S is attached to the ring of the revolver i, which is guided over a roller p. Halfway between the caster p and a further roller pl is a second cord S 'with the first cord S knotted. These two cords S and S1 run over the rollers pl and one third roller p2. The cords S and S1 are by tension springs F and F 'on the Latch 3 held. L is the web shop path. 4 denotes another crossbar, which is attached to the front of the sley block and to which two cross cords 5 and 6 are attached, which run across the sley web L and up to the cords S and S ', on which they are knotted.

The mode of operation is as follows: Is the turret i in the Position a, the cords S and S 'are pulled down by the tension springs F and F' drawn. As a result, the cross cords 5 and 6 come to rest on the sley web L and hold the crepon weft 7 lying on the web shop web under them. Now the right-hand weft thread 71 comes into play, d. H. the loom slides above the cords 5 and 6, under which the left-handed weft thread 7 lies, back and forth. Through the two cords 5 and 6, the left-twisted weft thread 7 and the right-hand weft thread 71 separated from each other. In the further work process the turret i moves to position b. The cords S and S 'against the action of the tension springs F and F' tightened, and the two cords 5 and 6 are raised by the height of the compartment and with it the right-hand weft thread 71 (dotted position). The left-hand weft thread can now be unhindered slide away under the cords 5 and 6 and thus under the weft thread 71 which is turned to the right. Then the process is repeated, i. H. the revolver i rotates afterwards the position a back, .and the left-handed weft thread is of the threads 5 and 6 pressed onto the sley L again.

The work process is carried out in a similar way with the climbing load changing chair. Fig. 3 shows how the two cords 5 and 6 hold the left-handed weft thread 7 on the sley web. The shuttle for the right-hand weft thread slides over the cords 5 and 6 and comes back after the second weft (right-hand wire) has been inserted. Instead of the shooter box S, the shooter box 9 now comes into the working position (dotted position) for the left-handed weft thread; ie if the left wire crepon is entered, the shuttle boxes are adjusted vertically by a shuttle height 1z. A lever with a roller Rl is attached to the contactor box. This lifts the angle lever W in the direction of the arrow x . On the angle lever W, which is rotatably mounted on the arm Z, there is also a roller R2 which swings out in the direction of the arrow when the arm W is rotated and presses against the cord S in the process. This forces the string to describe a great path. This detour amounts to a compartment height. The cords S and SI are tightened by this compartment height and thus the cross cords 5 and 6 are also raised by a compartment height. This ensures that the left-handed weft thread 7 can pass freely under the right-handed weft thread 71. After completion of this operation, the shuttle box comes back to the level of the sley web, and the two cords 5 and 6 come back to lie on the sley web and hold the crepe weft thread underneath, so that the crepe weft thread above the bar cannot intertwine with the bar below.

Claims (1)

PATENT CLAIMS: i. Device for separating the weft threads on looms with change of shooters using cords, characterized in that the Weft threads on the stretch between the fabric edge and the shooting box on several Place be separated from each other by the fact that several cross cords to hold the weft thread pulled by spring action on the sley web and for the purpose of letting the weft thread through pull cord from the revolver or riser box be lifted against the spring action. Device according to claim r, characterized characterized in that, in conjunction with climbing box interchangeable chairs, the hub of the Ouerschnuren lifting, from the riser box controlled cord pull through interconnection one of the roller levers pressed against the cord by the riser is enlarged will.