JPH0739313B2 - Automatic winder with thread suction pipe - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic winder having a yarn suction pipe.

[Conventional technology]

Some automatic winders have a yarn splicing device disclosed in Japanese Patent Publication No. 61-42708. That is, at the time of yarn joining, the yarn end on the yarn supplying bobbin side and the yarn side on the winding package side are sucked by a relay pipe and a suction pipe such as a suction mouth, respectively, and moved to a yarn joining member to perform yarn joining. There is. Further, both the suction mouth and the relay pipe are connected to a negative pressure hollow pipe arranged along the winder machine base through a suction duct. Therefore, for example, a suction mouth that has sucked the yarn end on the package side sucks the yarn end close to the package, holds it, and swivels around a single axis while sucking the yarn from the package and passes over the yarn joining member. By turning to the original position, the yarn is located between the package and the suction mouth in a state where the thread is stretched by the negative pressure in the suction mouth. At this time, the length of the unwound yarn becomes as long as 2-3 m, and the yarn extends from the suction mouth to the hollow tube through the suction duct. Then, the yarn guiding lever in the yarn joining device pushes the yarn between the package and the suction mouth to a predetermined position of the yarn joining member, that is, to the bobbin side and the position where the yarn should be joined, and the yarn joining is executed.

At this time, the package side thread end extends from the suction duct to the hollow tube, and thread cutting may occur when the thread pushing force of the thread pulling lever is greater than the thread strength. The shutter cutter disclosed in Japanese Laid-Open Patent Publication No. 30255 is provided between the suction duct and the hollow tube, and in association with the movement of the suction mouth, the thread extending to the package and the hollow tube is cut so that the thread end is free and When the force is turned off, the yarn pulling lever is operated so that the yarn inside the suction mouth is pulled out and introduced into a predetermined position of the yarn joining member.

[Problems to be solved by the invention]

In the above device, a thread cutting error may occur when a fixed blade, a movable blade, or the like that constitutes the cutter of the shutter cutter is worn or the gap between the blades becomes large. In this case, the yarn end does not become free, and it becomes impossible to push the yarn between the package and the suction mouth into the yarn joining member.

Alternatively, in the winder of the type in which the yarn splicing device including the suction mouth and the interruption pipe is installed in each winding unit, the provision of the shutter cutter causes a high cost per unit.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned various problems, and is an inexpensive device and ensures and stable yarn pulling operation.
An object of the present invention is to provide a device that can omit the shutter cutter.

[Means for solving problems]

According to the present invention, the hollow shaft, which is the center of rotation of the suction pipe, rotates integrally with the suction pipe, and a yarn catching member for catching the sucked yarn is provided at the end opening of the hollow shaft for suction. The slack is caused in a part of the thread.

[Action]

By capturing a part of the sucked yarn in the suction pipe and further unraveling the yarn of the package, a yarn longer than the shortest distance of the yarn is sucked between the trapping point and the package, Thread talumi will occur in the suction pipe or the thread suction passage, and when the thread between the package and the inlet of the suction mouth is pushed into the yarn splicing device by the thread shifting lever, the thread of the talumi is pulled out from the suction mouth. This means that the thread can be pushed in with an extremely small force.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

An example of an automatic winder is shown in FIGS. 1 and 2.
A shaft (2) and a hollow pipe (3) are fixed to the frame (1), and a winding unit (4) is mounted and fixed to the shaft (2) and the hollow pipe (3). The hollow tube (3) is connected to a blower (not shown), and the inside is always in a negative pressure state.

A spinning bobbin (5) is positioned and fed at a lower portion of the unit (4), and a traverse drum (6) is provided at an upper portion of the unit (4). 7) is rotatably supported by the cradle arm (12). Therefore, the package (7) rotates with the rotation of the drum (6), and the yarn of the bobbin (5) is unwound and wound around the package (7).

Between the bobbin (5) and the package (7), a balloon guide (8) and a yarn (Y) passing through the balloon guide (8) for smoothing the loosening of the yarn from the bobbin (5). ) To tension the device (9),
Furthermore, a slab catcher (10) for detecting a defect in the yarn (Y) that has passed through the tension device (9) and actively cutting the yarn with a built-in cutter is arranged.

A yarn sensor (11) is arranged between the tension device (9) and the slab catcher (10), and a yarn joining device (13) is arranged between the slab catcher (10) and the drum (6). To be done.

The suction mouth (14) and the relay pipe (15) pivot around the hollow shafts (16) and (17) as a fulcrum with the rotational movement of the cam operated by the yarn non-signal by the slab catcher (10). The suction mouth (14) sucks and holds the yarn end on the package (7) side and guides it to the yarn joining device (13).
The relay pipe (15) sucks and holds the yarn end on the bobbin (5) side and guides it to the yarn joining device (13). In addition,
The suction mouth (14) is hollow, and the package side opening is a flat opening (18) having a width substantially equal to the package width and is connected to the winding unit (4). The relay pipe (15) also has a hollow shape, and a clamp member (19) for nipping the yarn is provided at the suction opening portion of the bobbin side yarn end.

Inside the winding unit (4), as shown in FIG. 3, the suction duct (20), the driving shaft (22), the cams (23) (2).
4) (25), etc. are built in, and the suction mouth (14) and the relay pipe (15) are connected to the suction duct (20) via hollow shafts (16) (17), respectively. A pipe (25) connected to the hollow pipe (3) is connected to the duct (20), and a shutter (26) is connected to the connecting portion.
Is provided to turn on / off the action of the suction airflow in the suction duct (20), that is, in the suction mouth (14) and the relay pipe (15).

Incidentally, (27) is a bobbin storage magazine, and (28) is a drum drive motor.

FIG. 4 shows the drive mechanism of the suction mouse (14). A hollow shaft (16) around the center of rotation of the suction mouth (14) is supported by a bearing (29) fixed to the frame of the winding unit, and a gear (30) is fixed to the outer periphery of the hollow shaft (16). It meshes with the teeth of the segment gear (31). The segment gear (31) is rotated by a cam lever (3
3) The suction mouth (14) is swung up along the locus (36) when the segment gear (31) is swung in the direction of the arrows (34) (35) by the cam (24) formed at the tip end, Turn down. (37) is a spring for biasing the cam follower (38) on the cam lever (33) against the cam (24).

Further, in FIG. 5, a yarn catching mechanism (40) for the suction yarn end provided in the suction duct (20) is shown. (41) is a hollow shaft (16) at the center of rotation of the suction mouth (14) or a cylindrical body substantially integrated with the hollow shaft, and an end face (42) slightly protrudes into the suction duct (20). The provided and sucked yarn is discharged into the suction duct (20) through the opening (43) of the tubular body (41), and further the duct (20).
Pass through the inside in the direction of the arrow (44) and connect at the connection point (26) in Fig. 3.
Through the tube (25) into the hollow tube (3).

A cutout recess (45) is formed at the open end of the tubular body (41), and a flange portion (46) integral with the tubular body is formed on the outer peripheral surface of the tubular body (41). The above-mentioned brim (4
6) is formed, and a block piece (47) for catching a thread is fixed to the outer peripheral surface between the end surface and the brim end surface.

An embodiment of the yarn catching mechanism (40) will be described in detail with reference to Figs. The cylindrical body (41) is a hollow shaft (1
The thread catching surface (46a) of the collar portion (46) fixed to the tubular body (41) is fixed to the block body (41), and the block piece (4)
A slanted gap (48) is formed between the end face (47a) of 7) and the thread enters the gap (48) and is caught by the wedge action.

As shown in FIG. 7, the block piece (47) is formed into a fan shape over a certain range along the outer peripheral surface of the cylindrical body (41), but is almost entirely except for the notch recess (45). It is also possible to form over the circumference.

Further, although the inclined gap (48) in FIG. 8 is formed by inclining the end face of the collar, conversely, the yarn catching face (47) of the block piece (47) is formed.
It is possible to incline a) or to incline both sides.

The operation of the above apparatus will be described below.

In FIG. 4, the suction mouth (14) is at the standby position indicated by the broken line, and the hollow shaft (16) integrated with the suction mouth (14) is moved through the cam (24) and the cam lever (33) in response to the yarn splicing command. It rotates in the (56) direction and the tip of the mouse approaches the package and sucks the thread end. At this time, the shutter (26) in FIG. 3 is opened and the suction airflow acts on the suction mouth (14) through the suction duct (20).
With the rotation of the cam (24) in the direction of the arrow (49), the suction mouth sucking the yarn end rotates in the reverse direction toward the original standby position by the rotation of the hollow shaft (16) in the direction of the arrow (50).

That is, when the suction mouse (14) is at the uppermost position close to the package, the cylindrical body (41) integral with the suction mouse (14) is at the position shown in FIG. Therefore the notch recess (45)
Is located in the passage of the thread to be sucked. The yarn end (Y1) sucked in this state passes through the recess (45) from the center of the tubular body (41) as shown in FIG.
The yarn discharged into the figure (20)) but restricted by the sequon duct (20) passes through the notch (45) from the suction duct (20) to the tube (25) and hollow tube (3) of FIG. ) Is sucked into. In this state, the yarn is pulled by the suction action without slack as shown in FIG.

Then, by the downward movement of the suction mouse, the cylindrical body (41)
Rotates in the direction of the arrow (51) as shown in Fig. 10, and the notch (45)
The thread engaging part (52) of the
11 When rotated to the position shown in the figure, the yarn enters the gap (48) between the block (47) and the collar (46) and is nipped, and the yarn portion (Y1) is sucked by the suction force in the suction duct. In addition, the yarn loosened from the package by the downward movement of the suction mouse causes a slack portion (Y2) as shown in FIG.

In this state, the yarn between the package (7) shown in FIG. 1 and the suction mouth opening end (18) is located above the yarn joining device (13), and then the yarn pulling lever moves the yarn to a predetermined position of the yarn joining member. The thread in the suction mouse is
Since there is a slack (Y2) as shown in Fig. 11, the thread can be pulled out of the Saution mouse very easily. At this time, the shutter (26) may be closed or may be opened to apply a constant tension to the yarn.

When the yarn splicing operation is completed, the cut thread on the suction mouth side remains nipped by the block piece (47) in FIG. 11, but at the next yarn splicing operation, the arrow (5
When the cylindrical body (41) rotates in the 3) direction, it is sucked and discharged from the suction duct (20) into the hollow pipe (3) of FIG. 3 at the moment the nip is opened.

In the above embodiment, the thread is composed of the block piece (47) and the collar portion (4).
The thread (Y1) shown in FIG. 6 moves into the clearance (48) with the rotation of the cylinder and is caught by the wedge action, so that the thread to be processed enters Even if the thickness of the yarn changes, it can be easily captured, and the trouble of adjusting the gap according to the yarn can be saved.

Further, since the block piece (47) is fixed to the cylindrical body (41) with the screw (55) and there is no movable part, the yarn catching action can always be surely performed.

The thread slack amount can be arbitrarily set by the mounting position of the block piece (47). That is, in the time chart shown in FIG. 13, the thread catching (K) is performed at the position (C1) at the time of the descending movement (C) of the suction mouse (14). The timing can be set by changing the position of the block piece (47).

In the above embodiments, the yarn catching device is provided in the suction passage of the suction mouth for yarn suction on the package side. However, depending on the type of winder, the suction passage of the yarn suction relay pipe on the yarn feeding bobbin side may be used. Of course, it is possible to provide the same device as that in the above-mentioned embodiment.

〔The invention's effect〕

As described above, according to the present invention, by disposing the simple yarn catching device in the suction passage, the yarn can be introduced into the yarn joining device without using an expensive device such as a conventional shutter cutter, and a cutter cutting error can occur. It is also possible to prevent a yarn splicing error caused by.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an automatic winder having a yarn joining device, FIG. 2 is a front view of the same, FIG. 3 is an inner side view of a winder showing suction passages such as suction ducts and hollow tubes, and FIG. FIG. 5 is a side view showing a driving mechanism of a suction mouse, FIG. 5 is a perspective view showing an embodiment of a yarn catching device according to the present invention, FIG. 6 is a front view of the same, FIG. Is a sectional view taken along the line VIII-VIII in FIG. 7, FIGS. 9 to 12 are diagrams for explaining the action of the yarn catching device, and FIG. 13 is a timing chart diagram showing the relationship between the movement of the suction mouse and the yarn catching operation. . (4) …… Winding unit (14) …… Suction mouth (16) …… Hollow shaft (20) …… Suction duct (40) …… Thread catching mechanism (41) …… Cylinder (45) …… Notch Recess (46) …… Brim (47) …… Block piece (48) …… Gap

Claims (1)

[Claims] 1. In an automatic winder having a suction pipe for sucking and holding a yarn and guiding it to a predetermined position, a hollow shaft which is a rotation center of the suction pipe rotates together with the suction pipe and the hollow shaft. An automatic winder having a yarn suction pipe, which is provided with a yarn catching member for catching the sucked yarn in the opening of the end thereof by a rotating action of a hollow shaft.