JPH01308365A - Ending device for thread and method thereof - Google Patents

Abstract

PURPOSE:To secure a seam in a state of having reduced a yarn end so much as no hindrance by constituting each piece of yarn at both ends of an ending joint so as to be cut at the root of a joint to the yarn that expanded both the ends of the joint. CONSTITUTION:Moving height of a body of a yarn cutting device 7 is adjusted by stopper nuts 83, 97, while a movable cutting edge 87 is favorably advanced into a part opened to a V shaped part of a joint of yarns Y1, Y2, and an optimum edge part of a fixed cutting part 77b is brought to a spot just under the joint. If a cylinder 75 is further extended from this state, it turns around the movable cutting edges 87, 87, making the yarn in the upper part so as to guide it by each top of these movable cutting edges 87, 87, and both ends of the joint is guided to a crossing force spot between the fixed cutting edge 77b and the movable cutting edge 87, cutting the joint between the yarns Y1, Y2 beneath the spot opened in a V-shaped form. Thus, such a seam as in a state of having reduced a yarn end so much as no hindrance is securable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a yarn splicing device and a yarn splicing method, and more particularly to a splicing of multifilament yarns of chemically synthetic fibers.

[Conventional technology]

Methods and devices for splicing two multifilament yarns made of synthetic fibers such as polyester or acrylic fibers by applying compressed fluid are already known (for example, Japanese Patent Publication No. 45-32' 1.88).

Traditionally, the issues here are the strength of the joint,
These are the angular ends of the thread that remain at both ends of the seam.

The strength of the seam has been greatly improved by improving the pressure of compressed fluid and the shape of the fluid swirl chamber that ejects the fluid, but the angular yarn ends at both ends of the seam still cannot be automatically cut and removed. No device has been developed to do so.

In the case of spun yarn consisting of an aggregate of short fibers, each yarn end is opened and some of the fibers are removed and tapered prior to splicing, as shown in Japanese Patent Publication No. 56-47108, for example. Then, by overlapping the ends of the yarn in this manner and splicing the yarn by applying compressed fluid, it is possible to reduce the square yarn ends at both ends of the seam to the extent that there is almost no problem. However, in the case of filament yarn, it is impossible to remove some of the fibers as described above.
It was inevitable that large angular ends would be formed.

Measures have been taken to reduce the length of this angular yarn end by minimizing the clamp interval during yarn splicing, but these measures have not been able to sufficiently reduce the length. In the end, particularly large angular yarn ends had to be manually cut by the operator.

[Problem to be solved by the invention]

This invention is based on the above fact, and is based on the above-mentioned fact, regarding filament yarns of chemical fibers, which tend to have long angular yarn ends.
It is an object of the present invention to provide a yarn splicing device and a yarn splicing method that can obtain a seam in which the yarn ends are reduced to an extent that does not cause any problems.

[Means to solve the problem]

The present invention includes a pair of clamping means for clamping two threads arranged substantially parallel to each other at an appropriate interval, and a position of the thread clamped by the clamping means and bridged between the pair of clamping means. , the splicing nozzle moves between the yarn position and the retracted position, and the splicing nozzle moves to the yarn position. It consists of an expanding means that separates and spreads the yarn, and a thread cutting device that cuts one thread at each end of the spliced joint at the base of the spliced joint, with respect to the threads that have been spread at both ends of the joined part by the expanding means. A process of clamping two threads aligned approximately parallel to each other at an appropriate interval;
A process of splicing by applying compressed fluid to the clamped yarns, a process of separating the spliced yarns at both ends of the spliced joint into two pieces and spreading them, and a process of spreading both ends of the spliced yarn. This method consists of cutting one thread at each end of the thread at the base of the joint.

〔Example〕

1.2 are a front view and a plan view, respectively, of a yarn splicing device according to the present invention, and FIG. 3 is a sectional view taken along the line ■-■ in FIG. 1. In addition, in FIG. 1, a rotating drive device for the clamp fungus, which will be described later, is omitted.

The device of this embodiment is entirely installed on a frame plate (1) that serves as a base, and can be roughly divided into a thread guide device (2) for supporting two threads in a substantially parallel manner; ,
2 stably aligned by the thread guide device (2)
A pair of clamp devices (3) (4) that clamp the main thread at appropriate intervals, and a raised position at the same height as the bridged thread position between the pair of clamp devices (3) (4). , the splice nozzle (5) moves up and down between the yarn position and the lowered position, and the yarn spliced by the splice nozzle (5) at the raised position is connected to both ends of the spliced joint. Expansion device that separates and expands each into two (
6), approaches and leaves from the side the yarn with both ends of the spliced joint spread by the expanding device (6), and in the approaching position, a part of the cutter separates one thread at each end of the spliced joint. , and a thread cutting device (7) for cutting at the base of the joint.

Each device will be explained in detail below.

The thread guide device (2) includes a U-shaped block (9) in a plan view that is supported by a guide shaft (8) that stands upright from the frame plate (1) so as to be able to move up and down, and a block (9) that has a U-shape in plan view. An internal thread suction nozzle (11), a guide plate (12) also fixed to the side of the block tip, and a loft (13a) for raising and lowering the block whose tip is connected to the block (9) (14). The guide brake (12) is formed with two guide notches (15) that open upward, and the two threads (Yl) (Y2) are shown in Fig. 2. Introducing the tips into the guide notches (15) on the right side and the other side ends into the guide notches (15) on the left side, respectively, so that they intersect with each other in a substantially X shape in plan view, Thereafter, by operating the suction nozzle (11), each yarn tip is suctioned and held within the suction nozzle (11).

The suction nozzle (11) consists of a vibrator (16) buried in the block (9) and a compressed air passage (18) connected to an air injection hole (17) bored in the upper side of the pipe (16). . (19) is a connection port between the air passage (18) and an external compressed air source (not shown).

The block (9) can be raised and lowered to two positions (up and down) by the expansion and contraction of the cylinder (13), and the raised position (Fig. 1.3) is located between the opening of the suction nozzle (11) and the guide notch (1).
5) is the thread clamp height of the clamp devices (3) and (4) described below. Furthermore, the guide plate (12) is omitted from FIG. 1 to avoid cluttering the drawing.

Next is the clamp equipment! t (3) and (4), the clamping devices (3) and (4) are connected to the frame plate (1).
) are provided at the upper ends of a pair of swivel plates (21) (22) which are swingably supported via a horizontal support shaft (20) on a frame block (1a) which is integrally fixed on the frame block (1a). 21
) (22) is rotated by the rotation drive device (30) described later, the pair of clamp devices (3) and (4) approach and separate from each other, and the thread is clamped by the clamp devices (3) and (4). In this case, the action of stretching (stretching) the removed sutures is performed.

The clamping devices (3) and (4) are connected to the rotating plates (21) and (22).
) A pair of movable clamp plates (25) (26) each supported horizontally movably via a large diameter flanged pin (24) in a horizontally long hole (23) formed at the upper end of the clamp plate.
, a fixed clamp pin (27) fixed to the upper end of the rotating plates (21) and (22), and a movable clamp plate (2).
5) A lever (28) (26) for urging movement of the movable clamp plate (25) (26) is connected with a pin to (26).
It consists of a clamp plate (25) (
26) and the clamp pin (27), as shown in the second figure, a concave shape is formed on the side surfaces of the clamp plates (25) and (26) to match the convex shape of the side surface of the clamp pin (27). When the two (25) (26) (27) sides come into contact with each other, the thread is securely gripped between them.

The above levers (28) (29) are the support shafts (31) (
32) The movable clamp plates (25) and (26) are constantly biased by a coil spring (not shown) inserted at the position so that they move in the direction of approaching each other (in the direction of contacting the clamp pin (27)), This movable clamp plate (2
5) (26) is brought into contact with the clamp pin (2T) by touching the knobs (25 &) (26a) protruding from the upper surface of the clamp plates (25) (26) to the clamp pin (27), respectively.
) on the right side of Figure 1.2.
Regarding 6), another lever (29a) is integrally formed at the base end of the lever (29), and this lever (29a) is integrally formed with the base end of the lever (29).
29a) also engages with the cam plate (33) fixed to the block (9) of the thread guide device (2), which causes the movable clamp plate (26) to separate from the clamp pin (27), causing a gap between them. The grip on the thread is released.

That is, the lever (29) and the lever (29a) are formed in an oval shape as a whole, and the tip of the lever (29a) is long enough to engage the cam plate (33) fixed to the side surface of the block (9). (Fig. 1), when the block (9) starts to descend from the raised position, the lever (29) (29a)
is rotated in the clockwise direction in Figure 1, and the movable clamp plate (2
6) is moved to the right in Figure 1.

In addition, the above-mentioned rotating plates (21) (22) are attached to the support shaft (20
), the pair of clamp devices (3) and (4) are always urged in the direction of approaching each other by the compression spring (34) provided below the frame block (1a), and the stop plate (34) fixed to the upper surface of the frame block (1a) 35) regulates the pivoting position in the closing direction, and movement of the clamp devices (3) and (4) in the separating direction is performed by the next pivot drive device (30).

That is, the swing drive device (30) of this example includes lever portions (21a) (22a) that extend downward integrally from the swing plates (21) and (22) through the frame plate (1).
and the pin (3) at the lower end of the lever part (21a) (22a)
Links (38) (39') freely connected to 6) through slotted holes (37), and both links (38) (3
A cylinder (42) whose rod (42a) end is connected to a pin (41) which is rotatably connected to a pin (41) which is rotatably connected to a cylinder (42) and a fixed pin (43) which abuts the lower surface of the links (38) and (39). ), and when the cylinder (42) is contracted, the orbits of the links (38) and (39) are regulated by the fixed pins (43), so that the opening angle of the links (38) and (39) is changed to the solid line in Figure 3. As a result, the turning plate (21) (22) decreases as shown by the chain line.
is adapted to pivot against a spring (34).

Further, a known tie rod mechanism (44) is interposed in the rod (42a) of the cylinder (42), and the length of the rod (4211) can be adjusted.
The rotation angle of the rotation plates (21) (22) in the opening direction,
In other words, the maximum separation distance between the clamp devices (3) and (4) can be adjusted as desired.

The swing drive device (30) is not limited to the above-mentioned one, and for example, the swing drive device (30) is integrated with the swing plate (21> (22)).
(21a) (22a) A cylinder may be provided directly between them, or another link mechanism may be used.

In addition, as a member for adjusting the rotation angle in the opening direction of the rotation plates (21) and (22), instead of the above-mentioned tie rod, for example, a strike provided on the frame plate (1), a collar bolt (not shown), etc. may be used, and the stopper is the direct rotating plate (21) (2
2) It may be made to come into contact with.

Next, the splice nozzle (5) will be explained. The splice nozzle (5) is mounted on a bending plate (46) that is connected to the end of the rod (45a) of the cylinder (45) and moves up and down with respect to the frame plate (1). The cylinder (45) expands and contracts to move up and down between the solid line and the chain line in FIG. (47) is vertically installed from the splice nozzle (5),
The frame block (1a) and the frame plate (1)
This is a guide pipe integrated with a bending plate (46) that extends downward through the guide pipe (47), and compressed air for splicing flows through the guide pipe (47). (48) is a hose connected to a compressed air source.

Further, (49) is a shaft that is vertically installed from the bending plate (46) and freely passes through the frame plate (1), and a stopper nut (51) that is screwed onto the lower end of the shaft (49).
By adjusting the position of the splice nozzle (5)
The height of the highest position can be adjusted.

The splice nozzle (5) in this example includes a nozzle block (53) having a ■-shaped thread guide groove (52), and a nozzle block (53) that is continuous with the guide groove (52) and that is connected to the guide pipe (47) to receive pressurized air from the guide pipe (47). It consists of an air swirling chamber (54) from which air is blown out.

The splice nozzle (5) is connected to the cylinder (4) as described above.
The thread (5) is raised and lowered by the expansion and contraction of the splice nozzle (5).
A thread pushing cover device (55) is provided to push in the Yl) (Y2) through the guide groove (52) and to close off the air swirling chamber (54) from both sides.

That is, as shown in Figure 1.2.4, the frame plate (1
) supports an L-shaped bar (58) so as to be able to pivot freely around a support shaft (57);
When the lever (58) is turned to the position indicated by the dashed dot line in FIG. The yarn (Yl) (Y2) is introduced into the air swirling chamber (54) and the air swirling chamber (54) is introduced into the air swirling chamber (54).
4) Both sides are closed.

Therefore, the turning of the cursive lever (58) is performed in conjunction with the vertical movement of the splice nozzle (5), and the interlocking mechanism for this is as follows.

That is, a small diameter 1ffl (61) and a flange (62) are formed at the tip of the rod (45a) of the cylinder (45), and the sleeve portion (63) of the bending plate (46) is formed in the small diameter portion (61). ) at the same time as inserting the sleeve part (
63) and rod (45a) Proximal block (64)
A compression spring (65) is interposed between the cylinder rods (4
5a) and the bending plate (46) move up and down substantially as one body while no force acting against the spring (65) acts;
When the bending plate (46) is restricted from rising by the contact of the stopper nut (51) with the lower surface of the frame plate (1), the small diameter portion (61) of the rod continues to rise while pressing the spring (65). This rod (45
The roller (66) at the other end of the cursive lever (58) is positioned on the extension trajectory of a).

That is, at the highest position of the bending plate (46) (splice nozzle) (1-dot chain line in Figure 1), the rod (45)
a) The flange (62) at the tip comes into contact with the roller (66), and then only the rod (45a) continues to extend, so that the roller (66) is pushed by the 7 langes (62) and rises, and the L The cursor bar (58) pivots and the push plate (59) closes.

*, (67) is the block (6) at the proximal end of the rod (45a).
4), and the stopper bolt (67) is the minimum distance when the rod (45a) is extended and the distance between the bending plate (46) and the rod base end is reduced as described above. (67) The upper end is a bent plate (46)
The bending plate (4
This is to restrict the amount of protrusion of the rod small diameter portion (61) from the rod (6), and in turn, the turning angle of the push play (59).

Therefore, the rod (4) of this stopper bolt (67)
5a) The rotation angle and rotation position of the push-in plate (59) can be adjusted by adjusting the position relative to .

(68) is a large diameter window hole drilled in the frame plate (1).

Further, the above-mentioned cross-shaped lever (58) is always urged to rotate counterclockwise in FIG. 1 by a kick spring (not shown) attached to the support shaft (57).

Next, the expanding device (6) will be explained. The expanding device (6) in this example has a suction nozzle (
11) Engage with (11) and the cam plate (33) fixed to the block (9) of the thread guide device (2) and move the movable clamp plate (26). When the block (9) is lowered by the cylinder (13), the suction nozzle (11)
descends while suctioning each yarn end, and at the same time the suction nozzle (
The yarn end on the side that is being sucked by the movable clamp plate (2)
6) is released by opening and still holds the clamp plate (2).
5) Separate the two yarn ends at both ends of the joint from the spliced yarn that is passed between the clamp devices (3) and (4) by opening them wide up and down. .

Next, the thread cutting device (7) will be explained.

The thread cutting device (7) of this embodiment consists of a guide shaft (
The support block (72) is supported by the support block (71) in a vertically movable manner.
), a cutting device main body (74) horizontally movably supported by a guide shirt (73) horizontally protruding from the support block (72), and a rod (75&) of the cutting device main body (74). The ends are connected and the support block (7
A driving cylinder (75) whose main body side is supported by 2)
), and by expanding and contracting the cylinder (75), both the horizontal movement of the cutting device main body (74) along the guide shaft (73) and the operation of a part of the cutter on the cutting device main body (74) are performed. It looks like this.

That is, as shown in Figure 5.6, the cutting device main body (74) consists of a first block (76) and a second block (7) that are slidably movable along the guide shirt (73).
7) and is integrally fixed to the upper surface of the second block (77) and is slidably inserted into the slot 7) (78) on the upper part of the first block (76). First and second blocks (76) (77)
are slidably combined with each other, the rod (75a) end of the cylinder (75) is connected (79) to the first block (76), and the second. The tip of the block (77) is connected to the support block (72).
) is fixed (Fig. 2) with a positioning shaft (81) extending rearward (right side in Fig. 2.5.6) (Fig. 2), and when the cylinder (75) is contracted, the second block ( 77) is carried along with the first block (76) in the left row of Fig. 2.5.6, and when the cylinder (75) is extended,
The second block (77) is the positioning shirt) (
81), it moves along with the first block (76), but the second block (76)
7) is stopped by the positioning shaft (81), only the first block (76) continues to move forward.

(83) is a stopper nut screwed onto the positioning shaft (81), and when the nut (83) comes into contact with the side surface of the support block (72), the positioning shirt (81) moves forward (the second. 5.6 fixed row) position, that is, the forward (2.5.6 fixed row) position of the second block (77) is regulated, and by changing the screwing amount of this nut (83), , the restriction position and stop position of the second block (77) can be adjusted.

Further, (84) is a flange portion at the tip of the guide shaft (73), and a compression spring (85) is interposed between this flange portion (84) and the first block (76).

As mentioned above, the first and second blocks (76) (77) of the cutting device main body (74) are
At the fixed row end), the second block (77) first stops, then only the first block (76) releases the spring (8
5), the second block (77) moves forward by a slight amount while resisting the force (77a).The following cutter member is provided at the tip of the second block (77).

That is, the tip of the above-mentioned play (77a) is formed into a tapered trapezoidal fixed blade 8B (77b), and the base end thereof has a movable blade (87) that can freely rotate around the shaft (86). , a link (89) connected to the other end of the movable blade (87) with a pin (88), and the two links (89) (
89) and a pin (91) connecting the other ends thereof, and a tension spring (92) stretched between the two pins (88) allows each of the movable blades (87) to connect to the fixed blade portion. (77b).

The pin (91) protrudes to the lower surface of the plate (77a) through a long hole (93) formed in the plate (77a), and the lower end of the pin (91) is located on the front surface of the first block (76). The engaging convex portion (76a) so as to engage with the
is formed, and as the first block (76) moves after the second block (77) stops at the forward end, the bottle (91) becomes elongated (
93) is pushed forward, resulting in link (89) (
89) The movable blade (87) is configured to rotate in the closing direction via the movable blade (87).

When the first block (76) retreats due to the contraction of the cylinder (75) (No. 2.5.6), the pin (91) first moves back inside the elongated hole 93 (No. 2.5.6). (father), so spring (92) and link (89) (89)
The movable blade (87) opens again due to the action of the second.
5, and then the first block (76) and the second block (77) retract substantially as one body.

(94) is a spring inserted into the shaft (86), and the movable blade (
87) is always pressed against the fixed blade part (77b) surface.

Note that the guide shaft (7) of the support block (72)
1) is interposed with a compression spring (95) that always urges the support block (72) upward, and the guide shaft (7
1), two bolts (96) from the block (1b) are erected through the support block (72), and a stopper is screwed onto the upper part of the pole (96). The support block (72) is set at a predetermined height by the upward biasing force of the nut' (97) and the spring (95).

In other words, this stopper nut (97) Pol) (9
By adjusting the amount of threading into the bolt in 6),
The height of the support block (72) can be adjusted, and in turn, the height of the cutting device main body (74) can be adjusted.

Therefore, the height of the cutting device main body (74) is controlled by the clamping device (3) by this stopper nut (97).
4) Adjust according to the amount of hanging of the thread after splicing, and the fixed blade part (77b) at the forward position (right row in Fig. 2.5.6) ) (FIG. 7(b)), and by adjusting the stopper nut (83) of the positioning shaft (81), the thread (Ya) of the cutting device main body (74)
Adjust the amount of approach in the horizontal direction to the fixed blade part (77
b) has a trapezoidal shape, the above thread joint (Y
&) The substantial thread support length of the fixed blade portion (77b) directly below can be changed.

In other words, the splice nozzle (5) can be removed from the bending plate (46) and replaced as desired depending on the change in yarn type or denier. The thread joint part (Ya) hanging between the clamp devices (3) and (4) is inserted into the thread joint part (Ya) hanging between the clamp devices (3) and (4), and directly below it. Fixed blade part (77
b) The width is set so that it becomes the optimum ratio for thread cutting obtained experimentally.

Note that the above-mentioned optimum ratio means that the angular yarn end after cutting is the shortest when the supporting width of the fixed blade portion (77b) is approximately 3% shorter than the length of the yarn joint portion (Ya).

For example, if the yarn joint portion (Ya) is 15ml11, the optimum supporting width is about 14.5mm.

Also, cylinders (13) (42) for driving each of the above parts.
(45) (75) is operated at the predetermined timing described below by an air supply circuit using a known solenoid valve, and the supply of compressed air to the splice nozzle (5) is also performed at the following predetermined timing.

That is, the operator first presses the knobs (25 &) (26
a) Open the movable clamp plates (25) (26) to the left and right in Figure 1 with the
) (26) and set between the fixed clamp pins (27) in a substantially X-shape in plan view as shown in the second figure.

At this time, the suction nozzle (11) is also operated to suck and hold each yarn end, and then the grip portion (25a) (2
Remove your hand from 6a) and remove the movable lamp plate (25) (2
6) to the fixed clamp bin (27), and the two threads (Yl) (Y2) to the clamping devices (3) (4) respectively.
) and support it with moderate tension.

After the above preparations are completed, when the entire device is turned on and started to operate, the suction pressure of the nozzle (11) first becomes zero, and then the cylinder (42) temporarily contracts. The thread (
Yl) (Y2) is stretched at a predetermined stretching ratio, and then the rotating plates (21) and (22) are closed again by the force of the compression spring (34), and the clamping devices (3) and (4) are in the state shown by the solid line in Fig. 3. Return and tighten the two threads (Yl) between the clamping devices (3) and (4).
) (Y2) hangs down by the amount stretched (Figure 3)
.

The above-mentioned stretching ratio can be arbitrarily adjusted by adjusting the length of the rod (42a) of the cylinder (42) as described above.

Next, the cylinder (45) is extended and the splice nozzle (5) is raised to the hanging yarn position, and the push plate (59) is pivoted down.

As a result, the two yarns (Yl) (Y2) are well introduced into the air swirling chamber (54), and subsequently, pressurized air is ejected into the swirling chamber (54), and the swirling flow causes the yarn to join. (Ya) is formed.

When the yarn splicing is completed, the cylinder (45) contracts;
(59) goes up, the splice nozzle (5) goes down, and the spliced yarn (Yl) (Y
2) remains hanging between the clamping devices (3) and (4).

Then, the cylinder (42) contracts again and the clamp devices (3) and (4) open to the left and right in FIG.
At the same time, the suction nozzle (11) is brought into the suction state again, and the cylinder (13) is contracted for the first time, so that the suction nozzle (11) ) is lowered.

Then, as mentioned above, the cam plate (33) on the side of the block (9) moves to the movable clamp plate (26) on the suction nozzle (11) side.
Since only the clamp is released, the clamp device (3) (
4) In the thread (Yl) (Y2), as shown in FIG. 7(b), the thread portions at both ends of the joint (Ya) that have not yet been joined open into an Iv shape.

Then, the movable blade (87) is placed in this 7-shaped open part.
enters the fixed blade portion (7) directly below the joint portion (Ya).
7b) enters the cutting device main body (74).
ifi moves forward (fixed line 2.5.6).

At this time, the length and height position of the joint (Ya) are determined according to the stretching ratio set as described above and the splice nozzle (5).
The height of the movement of the cutting device main body (74) varies depending on the type of the stopper nut (83).
(97), so the movable blade (8
7) successfully enters the above-mentioned 7-shaped part, and the fixed blade part (77b
) is brought directly below the joint (Ya).

When the cylinder (75) further extends from this state, the movable blade (87) (87) rotates, and the movable blade (87)
(87) Both ends of the joint (Ya) are connected to the fixed blade (7) so that the upper thread is guided by the upper surface.
7b) and the movable blade (87), and the thread below the 7-shaped opening is cut at the base of the joint (Ya).

The thread whose bobbin thread has been cut loses its downward tension and is again tensioned in a substantially straight line between the clamping devices (3) and (4) (7th thread).
Figure (C)).

The thread cutting device main body (74) is retracted by the contraction of the cylinder (75) (2.5.6), and at the same time the suction pressure of the suction nozzle (11) is reduced to zero.

After that, if you manually release the clamps of the clamp devices (3) and (4) by operating the knobs (25a) and (26&), the yarn will be spliced smoothly, and the square yarn end (yb) will also be attached almost to its base. A single thread is obtained which is cut very short in sections. According to experiments, the average length of the yarn end (Yb) was about 0.5 mm.

As mentioned above, the above-mentioned drawing ratio and splice nozzle are appropriately changed and adjusted depending on the yarn thickness or yarn type, and when the drawing ratio is zero, that is, the clamping devices (3) and (4) are not expanded. It is also possible. In addition, the above knob (
It is also possible to easily open and close the movable clamp plates (25) and (26) automatically by providing a small cylinder between them.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, it is possible to automatically obtain a spliced yarn in which the angular ends of filament yarns are as short as possible and cause almost no hindrance in subsequent processes. It will be done.

[Brief explanation of the drawing]

Fig. 1 is a front view of the yarn piecing device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 4
The figure is a side view of the thread push-in cover device (IV-IV in Figure 1).
5 is a plan view of the main body of the yarn cutting device, FIG. 6 is a front view thereof, and FIG. 7 is an explanatory view of the yarn end cutting operation after yarn splicing. (3) (4) --- Clamp device, (5) - Splice nozzle, (6) Expanding device, (7) --- Thread cutting device, (11)
...Suction nozzle, (13) ...Cylinder, (21)
(22) ...Swivel plate, (25) (26) ...Movable clamp plate (28
) (29) (29a) --- Lever (30)
Rotating drive device, (33), cam plate, (45), cylinder, (74), cutting device body, (77b),
・Fixed blade part, (87)...Movable blade, (Yl)
(Y2) ・− system, (Ya ) −=− junction. 5th recess 7m Fig. 6 85 ”-/6a 73 Fig. 7 (C) ° “Y Bi Heaven, b□1

Claims (1)

[Claims] 1. A pair of clamping means for clamping two threads arranged substantially parallel to each other at an appropriate interval, and a wire clamped by the clamping means to bridge the space between the pair of clamping means The splice nozzle moves between the yarn position and the retracted position away from the yarn position, and the splice nozzle moves to the yarn position. An expansion means that separates and expands each into two,
A yarn splicing device comprising a yarn cutting device for cutting one yarn at each end of the spliced joint portion of the yarn whose both ends of the spliced portion have been expanded by the expanding means. 2. The yarn splicing device according to claim 1, wherein the pair of clamp means are movable toward and away from each other and are connected to a drive source for moving toward and away from each other. 3. The expanding means has a movable suction nozzle that suctions and holds the yarn ends of the two yarns, and the movement of the suction nozzle acts on the pair of clamping means, so that the ends of the two yarns are held by the suction nozzle. 3. The yarn splicing device according to claim 2, further comprising a clamp release means for releasing the clamp of the yarn on the side where the thread is present. 4. A process of clamping two threads aligned approximately parallel to each other at an appropriate interval, a process of applying compressed fluid to the threads between the clamps to splice the threads, and a process of splicing the spliced threads. A process of separating each end of the spliced joint into two pieces and widening them;
A yarn splicing method comprising the step of cutting one yarn at each end of a yarn that is spread out at both ends of the joint. 5. The yarn splicing method according to claim 4, further comprising a step of stretching the clamped yarn at a predetermined drawing ratio before the yarn splicing step.