JPH0770846A - Splicer - Google Patents

Abstract

PURPOSE:To provide a splicer which can form a yarn connection of a certain level of strength in the yarn connection between drawn yarn ends. CONSTITUTION:The splicer is provided with a mechanism which holds two drawn yarn ends Y1, Y2 with the first lever 5 and clamps 9, 10 and draws the yarn by swinging the first lever 5, with another mechanism which cuts the drawn yarn ends Y1, Y2 in a prescribed length with cutters 6, 7, arranging them in parallel to each other in the opposite directions by swinging their free ends with the second levers 12, 13 and sucks them into the cylindrical space 57 of the air nozzle 11, and with the air nozzle 11 which allows an air flow to inject into the cylindrical space 57 by the switching signals for the valve switch 72 to fully open the filaments of the yarn ends Y1, Y2 and connect them with their entanglement. Further, when needed, these mechanisms are sequentially operated by means of a cam mechanism 4 having a plurality of cams driven by a pneumatic cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicer which is pre-stretched and then spliced like a splicing portion of a false twisting yarn supplied to a stretching false twisting machine.

[0002]

2. Description of the Related Art Filament yarns, which are synthetic fibers, are generally drawn and false twisted. However, when packages after the draw and false twister are automatically doffed one by one using an automatic doffer, they are supplied to the draw and false twister. The unwinding of the yarn from the false twist yarn supply package also needs to be continuous. Therefore, the end tail of the false twist supply package mounted on the creel stand and unwound is joined to the start end of the preliminary false twist supply package.

If the yarns are spliced between the tails in the state of undrawn yarn, only that portion is thickened. When a yarn having such a thick portion is subjected to draw false twisting, the processing before or after the thick portion becomes uneven, resulting in a yarn defect.
Therefore, it has been practiced to draw each tail in advance, guide the drawn tails to an air nozzle, form an entanglement by an air flow, and join the yarns.

[0004]

However, if the tail is stretched by hand, the degree of stretching is insufficient or too strong, so that variations due to individual differences or the like are likely to occur. Therefore, even if it is a yarn splicing part that does not have a problem in quality,
There has been a problem that yarn breakage is likely to occur during the drawing false twisting process.

Therefore, a pair of clamps for grasping both ends of a pair of tails introduced into the air nozzle are provided so as to be able to come in contact with and separate from the air nozzle, the distance between the pair of clamps is widened and stretched, and then entangled by an air flow. Some have also been proposed. However, there is a problem in that the yarn portion before and after the yarn splicing portion also becomes a stretched yarn, resulting in insufficient yarn strength and causing yarn breakage. In addition, since the two yarns are aligned and sewn together by the air nozzle while holding both ends of the stretched yarn, the entanglement due to twisting may be insufficient and the splicing strength may be insufficient. There was also a problem.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to splice a yarn end after drawing, which has a certain strength. An object of the present invention is to provide a splicer capable of forming a yarn splicing part.

[0007]

Means for Solving the Problems A splicer for achieving the above object is a mechanism for drawing two yarn end portions, a mechanism for cutting two drawn portions into a predetermined length, and a predetermined length of two yarns. It has a mechanism for aligning both ends in the opposite direction and pulling them into an air nozzle to be described later, and an air nozzle for forming entanglement at both ends by an air flow.

[0008]

Operation: The drawing mechanism draws the two yarn end portions, the cutting mechanism cuts off the excess drawn portion to make the length of the drawn portion a predetermined length, and the retracting mechanism makes the drawn portions of the predetermined length in opposite directions. When they are aligned with each other and drawn into the air nozzle, only a stretched portion having a necessary length is formed, and twisting is sufficiently performed with both ends free to form a necessary entanglement and splicing. The stretching mechanism, the cutting mechanism, the retracting mechanism and the air nozzle can be actuated in a predetermined order by a cam mechanism driven by one driving means, and in that case, they are automatically actuated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side sectional view of the splicer, FIG. 2 is a top view, FIG. 3 is a sectional view taken along line XX of FIG. 1, and FIG. 4 is a top view of the cam plate.

1 and 2, the splicer 1
Accommodates the pneumatic cylinder 3 as one drive device and the cam plate 4 in the main body case 2,
On the upper surface of the first lever 5, a pair of cutters 6, 7,
A fixed thread guide 8, a pair of clamps 9 and 10, an air nozzle 11, a pair of second levers 12 and 13, and a push button 14 are arranged.

The first lever 5 is capable of gripping a yarn by a chuck 22 whose upper side is biased in a direction to be closed by a winding spring 21, is pivotally supported by a lower shaft 23, and the spring 2
4, the roller 26 is urged to the solid line position, and the arm 26 has a roller 26 at the tip thereof. When the roller 26 rides on the inclined portion 61a of the cam 61 of the cam plate 4, the first lever 5 swings as indicated by a chain double-dashed line.

As shown in FIG. 2, the two cutters 6, 7 and the yarn guide 8 are provided with a first lever 5 and an air nozzle 11.
Between the two yarn ends Y that are gripped by the first lever 5
A yarn path is formed that allows 1 and Y2 to be introduced into the air nozzle 11 in opposite directions. As shown in FIG. 3, the yarn guide 8 has two guide grooves 27, 28.
8, fixed blades 29, 30 are fixedly installed.
Movable blades 32 and 33 are axially supported by a shaft 31 of 30. A spherical roller 34 is rotatably supported on an arm 32a of one movable blade 32, and the other movable blade 33 is connected to one movable blade 32 by a connecting rod 35. The spherical roller 34 is guided by the guide grooves 62a, 62b of the second cam 62, and when guided by the guide groove 62a of FIG. 4, the cutters 6, 7 are open, and are guided by the guide groove 62b. At the stage, the cutters 6 and 7 are closed to cut the thread.

The clamps 9 and 10 shown in FIG.
Vertical V grooves 37, 3 on both side surfaces of the housing 36 of No. 1
L-shaped bent portions 39, 4 that press the thread against 8
The arms 41 and 42 having 0 are supported by a shaft 43 so as to be freely rotatable, and are biased by a spring 46 in a closing direction. The horizontal rollers 44 and 45 are axially supported by the arms 41 and 42, and are guided so as to sandwich both sides of the third cam 63 in FIG. When the horizontal rollers 44 and 45 are guided to the narrow portion 63a, the clamps 9 and 10 in FIG. 2 press the yarns Y1 and Y2 against the V grooves 37 and 38 to clamp them as indicated by the chain double-dashed line.

The second levers 12 and 13 in FIG. 1 have the plates 47 and 48 for holding the thread urged in the direction of closing by the pressing springs 49 and 50, and are swingably supported by the shaft 51. ,
It is biased by the spring 52 to the solid line position. The second lever 13 on the rear side of the drawing has an arm 53, and a roller 54 is pivotally supported at the tip thereof. The second lever 12,
The 13 are connected by a connecting rod 55. Then, when the roller 54 rides on the inclined portion 64a of the fourth cam 64, the second levers 12 and 13 swing as indicated by a chain double-dashed line.

The air nozzle 11 has a slit 56 through which the thread passes.
A cylindrical space 57 is provided below the cylindrical space 57, and an air injection port 58 is opened in the cylindrical space 57. A compressed air source for the air injection port 58 is connected via a connector 70 and a valve switch 72. Then, the roller 73 of the valve switch 72 causes the mountain portion 6 at the tip of the fourth cam 64 to
By overcoming 4a, the valve switch 72 is opened and turned on, and compressed air is supplied to the air nozzle 11. The air source for the pneumatic cylinder 3 is connected from the connector 72 via an operating valve (pneumatic switching valve) 71. While the push button 14 is being pressed, the operating valve 71 is in an ON state for supplying air pressure to the cylinder chamber,
The pneumatic cylinder 3 extends. When the push button 14 is released, the operate valve 71 is turned off to supply the pneumatic pressure to the rod side chamber, and the pneumatic cylinder 3 is shortened as shown.

As shown in FIGS. 3 and 4, the cam plate 4 includes a base 75, a first cam 61, and a second cam 6.
The second, the third cam 63 and the forty-third cam 64 are integrally attached, and are horizontally restricted by a guide 76 on the side surface of the base 75 and an elongated hole 77 on the side surface of the body case 2. Then, it is connected to the tip of the rod of the pneumatic cylinder 3 by the mounting portion 75 a of the base 75.

That is, when the push button 14 in FIG. 1 is pushed, the entire cam plate 4 in FIG. 4 moves to the left in the drawing together with the extension of the pneumatic cylinder 3. Then, the horizontal rollers 44 and 45 first enter the narrow portion 63a of the third cam 63, then the roller 26 rides on the inclined portion 61a of the first cam 61, and then the spherical roller 34 moves the guide groove 62a of the second cam 62. From the guide groove 62b to the horizontal roller 4
4, 45 exit from the thin portion 63a of the third cam 63, the roller 54 then rides on the inclined portion 64a of the fourth cam 64, and the roller 73 then rides over the mountain portion 64b of the fourth cam 64.

Next, the operation of the splicer 1 having the above structure will be described with reference to FIGS. FIG. 2 shows a first manual setting state. The yarn ends of the two yarns Y1 and Y2 are sandwiched by the tip of the first lever 5 and gripped. One thread end Y1
Is put into the guide groove 27 of the thread guide 8 and further into the slit 56 of the air nozzle 11, and the second lever 13
Is caught at the tip of. The other yarn end Y2 is put in the guide groove 28 of the yarn guide 8, is further put in the slit 56 of the air nozzle 11 and is aligned in parallel, and is sandwiched by the tip of the second lever 12 to be in the illustrated state. Then, when the push button 14 is pressed, yarn joining is automatically performed as follows.

In FIG. 5 (a), first, the clamp 10 is closed as shown by the arrow a, and the yarn end Y is formed between the clamp 10 and the housing 36.
Stop 1 and Y2 without slipping. Next, when the push button 14 is continuously pressed, the first lever 5 swings as shown by an arrow b in FIG. 5B, and the yarn ends Y1 and Y2 from the clamp 10 to the first lever 5 are pulled and stretched. . Then, in FIG. 5 (c), the cutters 6, 7 are closed as indicated by the arrow c, and the extended yarn ends Y1, Y reaching the clamp 10 are reached.
Cut 2. Then, in FIG. 5D, the clamp 10 is opened as shown by an arrow d, the second levers 12, 13 are swung as shown by an arrow e, and the stretched yarn ends Y1, Y2 are aligned in the air nozzle 11. Stretched yarn ends Y1, Y2
The cut portion of is adjusted so as to slightly protrude from the air nozzle 11. Then, the air nozzle 11 and the compressed air source are brought into communication with each other by the operation of a valve switch (not shown), and the filaments of the free yarn ends Y1 and Y2 stretched by the air flow ejected into the air nozzle 11 are twisted around each other,
It is spliced by entanglement.

After that, when the push button 14 is released,
It returns to the state of FIG. Then, by manually ejecting the spliced yarn from the air nozzle 11 and removing the yarns Y1 and Y2 from the second levers 12 and 13, the splicing is completed. Thus, except for the first and last setting operations, a series of yarn splicing operations are automatically performed by simply pressing and releasing the push button 14.

[0021]

According to the splicer of the present invention, the drawing mechanism and the drawing mechanism are separated, and the drawn yarn ends of a predetermined length corresponding to the length of the yarn splicing part are aligned in the air nozzle with both ends free. Since it is a structure that can be spliced, it is possible to minimize unnecessary stretched parts before and after the spliced part, and to perform sufficient twisting, and also by operating under the same conditions,
It is possible to form a yarn splicing portion with less strength reduction and less variation.

Since the drawing mechanism, the cutting mechanism, the retracting mechanism and the air nozzle can be automatically operated in a predetermined order by a cam mechanism driven by one driving means, the yarn end can be removed first. Except for the manual work of setting and removing the thread after the splicing, the button operation may be performed, and the operability may be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a splicer of the present invention.

FIG. 2 is a top view of the splicer of the present invention.

3 is a sectional view taken along line XX of FIG.

FIG. 4 is a top view of a cam plate.

FIG. 5 is an operation diagram of the splicer of the present invention.

[Explanation of symbols]

 1 Splicer 3 Pneumatic Cylinder 4 Cam Plate 5 First Lever (Stretching Mechanism) 6,7 Cutter (Cutting Mechanism) 8 Thread Guide 9,10 Clamp (Stretching Mechanism) 11 Air Nozzle 12,13 Second Lever (Retracting Mechanism) 61, 62, 63, 64 cam 72 valve switch

Claims (1)

[Claims] 1. A mechanism for stretching two yarn end portions, a mechanism for cutting two stretched portions into a predetermined length, and an air nozzle described later by aligning both ends of the two predetermined lengths in opposite directions. A splicer including a mechanism for drawing the air into an air nozzle and an air nozzle that forms entanglement at both ends by an air flow.