JPS63277178A - Pick finding device for yarn end - Google Patents

Abstract

PURPOSE:To make the pick finding of a yarn end performable even in case of a half-bundle bobbin where the yarn end is mixed in a chase part by pressing a contact piece, large in a friction factor with the turning of a fulcrum shaft, to a yarn later surface of the chase part of the bobbin after the tilt. CONSTITUTION:When a bobbin 2d is reached to the station D provided with a beater device 23, the contact piece 22, large in a friction factor, attached to a fulcrum shaft 21 at the angle almost followed after a tilt theta1 of the yarn layer surface of a chase part 27 of the bobbin is pressed to the surface by rotation of the fulcrum shaft 21. And, with yarn releasing directional rotation of the bobbin 2d, a yarn mass is attracted to a suction pipe 14 owing to synergism of the twine of a yarn end being mixed in a yarn layer of the chase part 27 and the suction action made by a jet air flow out of nozzles 48 and 49 and the suction pie 14, thus pick finding takes place. doing like this, even in case of a half-bundle bobbin, where the yarn end is mixed in the chase part, the pick finding of the yarn end can be done just like a normal full-bobbin.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a thread end pick-up device.

[Conventional technology]

When a spinning bobbin wound by a ring-spinning machine is supplied to an automatic wine gourd and then rewound, a so-called lead-out process is performed in advance to loosen the thread ends of the bobbin. As such a pick-up device, there is a type that is equipped with a mechanism that injects compressed air into the punched part of the top or bottom of the bobbin, and a mechanism that sucks the thread end unraveled by the air injection, or a type that is equipped with a mechanism that injects compressed air into the punched part at the top or bottom of the bobbin, and a mechanism that sucks the yarn end unraveled by the air jet. There are various types of lead-out devices, such as a type that forcibly pulls out the thread.

[Problems to be Solved by the Invention] On the other hand, among the spinning bobbins mentioned above, there are bobbins called half-bobbins that are not fully wound due to yarn type changes or lot changes. The end of the thread is located in the chess part. Therefore, with the conventional device in which the thread pulling mechanism is located at the punched portion, it is difficult to automatically thread the thread end of the half-ball bobbin.

In particular, spinning winders that are suitable for high-mix, low-volume production that directly connect a spinning machine and an automatic wine goose have many cases where the bobbin is not fully wound and the end of the thread is located in the chess part, which is the so-called chess cut bone. Also, there was a desire for a device that could automatically take out the thread end.

The present invention aims to solve the above problems.

[Means for solving problems]

In the present invention, a contact piece with a large coefficient of friction is attached to a support shaft at an angle that approximately follows the slope of the thread layer surface of the chess part of the bobbin.
As the support shaft rotates, the contact pieces are pressed into contact with each other in the shape of a chessboard.

〔Example〕

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

FIG. 8 shows an example of a so-called top punch punching device in which a punch winding is formed on the head of a hobbin.

The conveyance path (3) of the bobbin (2) attached to the tray (1)
) (3a) An annular transfer path (4) is provided in the middle of (3a),
The receiving station (A) position of the annular transfer path (4) is connected to the carry-in path (3), and the bobbin discharging station (F) position of the annular transfer path (4) is connected to the carry-out path (3a), Part of the circular transfer path, i.e. station (A)-+
Station (F) is used as a passage for processing the uncoupled bobbin, and the remaining passages, that is, stations (F), (G), and (H) are used as passages for feedback of the uncoupled bobbin.

The spun bobbin (2) is inserted into the tray (1) and is transferred along the conveyance path (3) in the direction of the arrow (5) to reach the receiving position (A) of the pick-out device. Tray receiving parts (7) formed at regular pitch intervals on the rotary plate (6) of the feeder.
The bobbin (2) received by the arrow (
8) With the intermittent rotation in the direction, each processing station (B
) (C) (D) (E) The bobbin (2S) that has been successfully taken out is transported in the direction of the arrow (9) along the transport path (3a) toward the wine goo.

A cutter device for unscrewing the bottom punch is installed in the station (B) only when handling a bobbin with a bottom punch, but in this example, since only the top punch is handled, the cutter device described above is installed. Instead, the bobbin only waits at station (B).

At the station (C), a searcher mechanism is installed to search for the thread when winding the surface of the yarn layer of the bobbin (2), which is called backwinding, in a normal manner, and the backwind is brought up from the surface of the yarn layer.

Next, at the station (D), a top punch loosening/suction device (12) is installed. For example, a pair of rollers (13a) (1
3b) is provided with the rotation axis slightly inclined, and the roller (1
3a) The top punch is released by the rotation of (13b), and the thread coming out of the bobbin head is sucked into the suction pipe (14) having an opening near the bobbin head.

Furthermore, the station (E) is provided with a thread end insertion mechanism (16) that cuts the thread pulled out from the bobbin into a certain length and inserts the thread end into the center hole (15) of the bobbin (2). It will be done.

That is, the bobbin (2) positioned at the station (E)
e) and suction by: slit (17) of j (14)
The thread (Y2) running in between takes a certain fixed thread path due to the tension caused by the sakun yongka. A cutter device (18) into which the yarn is naturally introduced when taking the yarn path, and a yarn sensor (19) are arranged at a set position from the upper end of the bobbin.

Note that as the sensor (19), a photoelectric sensor, a capacitive sensor, a sensor using a piezoelectric element, a whisker type microswitch, etc. can be applied, but the responsiveness and
A photoelectric sensor is preferable in terms of durability, reliability, etc.

Next, the beater device provided at the station (D) will be explained. In Fig. 1, near the bobbin (2d) of the station (D), there is a support shaft (21) inclined at an angle (θ) with respect to a virtual straight line (20) parallel to the axis of the bobbin (2d).
A beater device (23) is provided, to which a contact piece (22) having a large friction coefficient is fixed, and a drive mechanism that allows the support shaft (21) to move along a fixed trajectory.

The contact piece (22) is made of a flexible rubber plate as shown in Figure 6, or a brush (24) with short bristles fixed to the end of the rubber plate, or a brush (24) as shown in Figure 7. A contact piece (26) having a plurality of grooves (25) formed on the thread layer contacting end of the contact piece (24) to which the thread layer contacting side is fixed to make it easier to follow the shape of the bobbin can be used.

Further, it is sufficient that the inclination angle (θ) of the support shaft (21) is approximately equal to the taper angle (θ1) of the chess portion (27) as shown in FIG. That is, when the support shaft (21) is rotated in parallel, the angle (θ
). That is, as shown in Fig. 5, the support shaft (21
) is rotated along an elliptical trajectory (28), the contact piece (22) acts to hit the chess piece (27) slightly from below to above. Therefore, a certain point (P
) acts to slide upward on the surface of the yarn layer as shown by the arrow (29), making it easier to search for yarn ends mixed in the chess section.

Figure 2.3 shows the - of the drive mechanism (30) of the support shaft (21).
Give an example. A drive shaft (32) and a freely rotating shaft (33) are supported on the fixed frame (31) which is inclined with respect to the horizontal plane by the above-mentioned angle (θ). The above drive shaft (3
2) is rotated by a drive source such as a motor (34), a short lever (35) is fixed to the shaft (32), a long lever (36) is pivotally supported to the one-sided shaft (33), The swing arm (3) links the levers (35) and (36) above.
7) is pivoted at two places (38) (39). The support shaft (21) is fixed to the end of the swing arm (37). (22) is a contact piece.

Also, the pin (40) of the frame (31) and the lever (36)
) A spring (42) is applied between the pins (41) on the top (41) to urge the lever (36) counterclockwise.

Therefore, as shown in Fig. 4, the lever (35) is connected to the shaft (32).
When rotated in the direction of arrow (43), the swinging arm (
37) is a dashed dot line (37a) and a dashed double dotted line (37b)
Draw a roughly elliptical trajectory with the position as the turn part, and turn the arm (
The contact piece (22) is connected to the support shaft (21) fixed to the
The tip touches the chess part (27) of the bobbin while tracing an elliptical trajectory (44).

In such an apparatus, at the station (D), the bobbin (2d) is connected to the drive roller (45) as shown in FIG.
) is rotated in the direction in which the thread is unraveled ((46) in Fig. 4), and the contact piece (22) moves in the direction of the arrow (44), so that the thread layer of the chess part (27) is rotated. As shown in Fig. 1, the mixed thread ends become entangled in a thread mass (47), and the air flow ejected from the nozzles (48) (49) from below and the suction action of the suction pipe (14) from above. Due to the interaction, the thread mass (47) is sucked into the suction pipe (14) and the thread is pulled out.

That is, as shown in FIG. 8, the thread (Yl) taken out at the station (D) moves along the slit 7) (17) of the suction pipe (14) and becomes connected to the bobbin (2d). Next, by one pitch rotation of the rotating body (4), the bobbin (2d) of station (D) is moved to station (E), and as described above, the cutter (18) is operated and the suction pipe ( The thread 1 (Y3) cut by the suction airflow generated in the bobbin center hole (15) by 50) is inserted into the bobbin center hole (15) and hangs down.

The beater device (23) is installed at the station (D) of the output device shown in FIG. 8, the contact piece (22) shown in FIG. When I hit the chess part of the bobbin from bottom to top,
The success rate for half-ball bobbins is 97% (the number of bobbins is about 20).
0 pieces). In addition, when using the contact piece (26) shown in Fig. 7, the success rate of opening is approximately 95% (the number of bobbins is approximately 30).
0 pieces). Furthermore, use the contact piece shown in Figure 7 to connect the blank (24
Even when using a contact piece without ), the extraction success rate was approximately 80%.

〔Effect of the invention〕

As described above, according to the present invention, even in a half-weld bobbin in which yarn ends are mixed in the chess part, the yarn ends can be taken out in the same way as in a normal full bobbin, and this is particularly effective in spinning winders where a large amount of half-beams are generated. be.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a front view showing the drive mechanism of the beater, and Fig. 4 shows the locus of movement of the contact piece (22). FIG. 5 is a front view showing the positional relationship between the contact piece (22) and the chess part,
FIG. 6 is a perspective view showing an embodiment of the contact piece, FIG. 7 is a perspective view showing another example of the contact piece, and FIG. 8 is a schematic perspective view showing an example of the ejecting device. (2)...Bobbin (21)...Spindle (22) (26)...Contact piece (27)...Chess part (30)...Drive mechanism

Claims (1)

[Claims] A contact piece with a large friction coefficient is attached to a support shaft inclined at an angle related to the inclination of the thread layer surface of the chess part of the bobbin, and as the support shaft rotates, the contact piece moves to the chess part. A thread end pulling device characterized in that the thread end is pressure-welded in accordance with the following.