DE1922241A1 - Device for cutting a thread of thread - Google Patents

Description

Leesona Corporation

Warwick, RI. Y.St.A. 3 0 APR. 1969 Device for cutting a thread of thread

The invention relates to and relates to textile machines in particular a device for severing a thread of yarn.

The expression "G-arn" used in the following is intended in his general sense to be understood and Bich in all kinds of thread-like material, both textile and of another type, while the term "lap" or "yarn lap" refers to the product of a winding machine independently to denote by its shape.

In the textile industry, numerous types of thread Eheren are already known, many of which have cutting blades that move m relative to each other, while others only have a single cutting edge. Thread scissors with movable blades require some kind of power source to move the blades and are of course more complex than thread scissors with a single, fixed blade. With the last-mentioned thread scissors, the yarn usually runs across the cutting edge, which accelerates the dulling of the cutting edge. If the yarn tension increases sufficiently, the yarn is cut.

The invention relates to thread scissors with fixed

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standing cutting edge. In short, this is where the yarn is taken up by a guide slot in the Sehere company and held out of contact with the cutting edge by a retainer which retains the yarn until one is subjected to such strong tensile stress that; 3 a spring force holding the holding member is overcome, whereupon the tensioned thread snaps against the cutting edge and is severed.

"The object of the invention is therefore primarily Creation of a new and improved thread scissors.

The object of the invention also includes the creation of a new and improved thread scissors with a fixed Cutting edge. The aim of the invention related to this is aimed at creating a dei'-like thread scissors, in which a thread of thread is kept out of contact with the cutting edge until the thread falls under such Tension arrives that it snaps against the cutting edge, resulting in a smooth cut.

) More precisely, the invention creates a novel and improved device for severing a thread, the specialty of which is that it has a base or » having a base and two spaced apart, attached to and generalized from the base Direction has protruding guides, which between them a guide slot with an open end for receiving. set the thread, with a cutting edge extending across the slot for severing the thread, and that a detachable retaining member is provided which holds the thread in the slot at a distance from the trailing edge or Holding the blade and pressing it against it at a predetermined pressure

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the cutting edge releases so that it is against the Cutting edge shifted.

The following is the invention in preferred embodiments explained in more detail with reference to drawings. Show it:

Fig. 1 is a schematic perspective partial front view a winding or winding machine with thread scissors with the features of the invention,

Fig. 2 is a rear view of the thread shell, in enlarged Scale,

Fig. 3 is a section taken substantially along line 3-3 in Fig. 2,

4 shows a view similar to FIG. 2 of a modified embodiment of the invention,

Fig. 5 is a section taken substantially along line 5-5 in Fig. 4,

Fig. 6 is an enlarged partial sectional view practically along the line 6-6 in Fig. _4f and

FIG. 7 shows a likewise enlarged cross section along the line 7-7 in FIG. 4.

In Fig. 1 a thread scissors 10 in connection with a winding or winding machine 12 is shown. The winding machine 12 has a spindle 14 which receives a winding core 16 telescopically. To initiate dee winding process, a thread of yarn Y on a hub 18 of the spindle H, via

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a guide wheel 20 and then through the thread scissors 10 to a suction nozzle 22 drawn. If, after the spindle 14 starts to rotate, its speed increases, the yarn jumps in attacking finger 24 to the outside and grips the running yarn thread Y, whereby the winding of the yarn on the Winding core 16 is initiated.

While the spindle 14 accelerates to the winding speed, the yarn Y runs according to FIG. 2 through a guide slot 26 w and over a holding member 28 of the thread scissors 10. As soon as the thread has been grasped by the finger 24 of the spindle, the direction of its rectilinear movement is reversed and the thread tension increases almost instantaneously, so that the pressure exerted by the thread on the holding member 28 causes the latter to release the thread. The thread now jumps or snaps against a part of the cutting blades 32 which forms a rear edge section 30 and is severed while the free thread end is removed by the suction nozzle 22. Preferably, the thread should be drawn against the cutting edge at an angle of about 45 ° to the surfaces of the cutting blades.

According to FIGS. 1 to 3 , the thread tube 10 has a base or a socket in the form of a cylindrical steel rod 34, for example, with a sehmalen recess 36, which receives and aligns the cutting blades 32 seated on a pin embedded in the steel rod 34 with a tight fit or centered. Each cutting blade has a bevelled trailing edge and both cutting edges together form the V-shaped cutting edge area 30. Two guides 40 are inserted into a larger recess 42, which lie over the trailing edge blades 32 and are

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ben 44 against the cutting blade !! are pressed. These Guides 40 are spaced from one another and define the guide slot 26 between their opposite edges. They extend in each in the same general direction upward beyond the cutting blades 32 and outward at their upper ends beveled so that they guide the thread of thread into the slot. For shielding the sharp cutting edge sections 30 of the cutting blades, the guides 40 are cranked at 46 (Fig. 3) so that they are over the cutting edges lie.

The holding member 28 has the shape of a finger with a U-shaped end portion 48 »which the outer edge of the a guide 40 engages and on this by means of a Pivot 50 is hinged. A spiral iDorsion spring 52 is placed telescopically on the pivot pin 50, one end 54 of which at the bend portion of the TJ-shaped end portion 48 attacks, while her other end 56 attacks penetrates the bore provided in the guide 40 and urges the retaining member upwards around its pivot pin, to the bent portion of the U-shaped end portion 48 abuts against the outer edge of the guide 40. In this position, the upper edge of the holding member is essentially vertical to guide slot 26.

When the yarn thread Y from the finger 24 'of the rotating Spindle 14 is detected, the yarn thread exerts such a pressure on the holding member as a result of the increased thread tension 28 from that this is pivoted downwards so that the thread snaps against the cutting edge portion 30 and is severed »-. "· ■

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A modified embodiment is shown in FIGS. 4 and 7 a thread scissors 60 shown, which an Easis or a Has base 62 with an add-on shaft 64, the lower part 66 of a body 68 on the upper part of the shaft is pivotally mounted and is held in operational alignment by an adjusting screw 70, which an elongated hole ″ 72 provided in the body 68 passes through it. Two essentially protrude from the lower part 66 of the body 68 U-shaped guides 74 upwards, which are opposite to each other

W have cavities 76 lying. In a holder portion 80 of the shank 54 S elin ei dkl ing s are similar to a cutting edge portion 79 to the anchors previously described 78 and -schlossen of the cavities 76 of the under establishing a leadership ■ approximately slot 32 guides 74 ¹ ^ ¹¹ apart. A holding member 84 in the form of a thin finger 86 is attached to a small block 88 which is mounted between the opposing legs 90 of one of the guides 74 by means of a pivot pin 92. According to FIG. 6, a spiral torsion spring 94 is placed telescopically on the pivot pin 92 and rests with one end 96 on the guide 74, while the other end 98 is supported on the block 88 and urges the finger upwards. The block 88 B strikes the bent section of the guide 74 and thereby limits the upward displacement of the finger 86 to a position that is practically perpendicular to the guide slot 82. The operation of this embodiment of the invention corresponds entirely to that of the embodiment described first. When the tension of the yarn thread Y increases sufficiently, the finger 86 is pivoted downwards by the pressure exerted on it by the yarn, so that the yarn thread can snap against the cutting edge of the cutting blades 78 and is thereby severed.

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In summary, the invention therefore creates thread scissors which take up a thread of thread fed to it and holding it out of contact with a cutting edge by means of a holding member. If through the thread a sufficient If high pressure is exerted on the retaining member, the thread is released and severed. With the "described Embodiments is related to the more fadeish shown with a winding machine, which has a suction nozzle sun pulling off the .Gamfadens until he begins 3 of a new thread package on the winding spindle is determined and severed at this point in time.

Although the invention has been described above in connection with specific embodiments and in a particular field of application As illustrated and described, numerous changes and modifications will of course be apparent to those skilled in the art possible; for this reason, the invention is in no way intended to apply to the illustrated and described embodiments but all changes and modifications within the extended scope of protection with include.

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Claims (7)

P a t e Ii t a η s ρ r ü c Ii e A device for severing a thread of yarn, sprouted, is characterized by two guides (40; 74) attached to a base or a socket, spaced from one another and projecting in the same direction from the base, which have a 'guide slot (26; 82) between them. set yarn (Y), transversely across the guide * · slot extending cutting blades (52; 7 ^) having an open end for receiving the yarn - - ^"to carry" of the yarn thread and means for separating under a predetermined pressure toward the Cutting blade towards releasable holding of the yarn in the FuhrungS * slot. 2. Device according to claim 1, characterized in that the device for releasably holding the yarn «· a holding member (28; 84) and a holding member ) in a holding position, in which it is to hold on ten of the yarn thread (Y) extends across the guide slot (26; 82), urging means (52 j 94) on ^ - has. 3. Device according to claim 2, characterized in that the holding member (28j 84) is pivotably mounted on one of the guides (40j 74) and is spring-loaded into the holding position. 4. Device according to claim 3 »characterized in that that the cutting blades (32; 78) a substantially Have V-shaped cutting edge portion (30; 79). 5. Apparatus according to claim 4 »characterized in that the cutting blades (32; 78) one of the holding member (28; 84) facing cutting edge section (30; 79) have and that the guides (40; 74) are arranged bent over this cutting edge portion. 6. Apparatus according to claim 4> characterized in that the cutting blades (32; 78) from the guides (40; 74) are enclosed. 7. Apparatus according to claim 6, characterized in that that each of the two guides (74) has a cavity (76), the cavities facing each other, and that the cutting blades (78) and the retaining member (84) are in the cavities. SAD 909845/1203 Blank page