JPH0665583B2 - Yarn end device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bobbin yarn end lead-out device.

[Conventional technology]

The spinning bobbin produced by the ring spinning machine (hereinafter simply referred to as bobbin) is supplied to the automatic winder in the next process, and is rewound into a package with a yarn amount and shape that suits the purpose of use. Bunch winding is applied to the winding tube portion at the upper or lower end of the bobbin to prevent loosening of the yarn inside. Therefore, prior to supplying the bobbin to the winder, the bunch winding is unwound, and the yarn end is put out in a state convenient for starting the winding by the winder. That is, a device generally called a spout device or a yarn end preparation device is provided near the winder,
The bobbin conveyed from the spinning machine is once supplied to the above-mentioned dispensing device, subjected to dispensing processing, and then supplied to the winder.

As the above-mentioned output device, there is, for example, the device disclosed in JP-A-61-45870. That is, the yarn end sucked out from the bobbin by the suction mouth is cut at a certain position, and the yarn end is inserted and hung down from the upper end of the bobbin into the central hole by the suction airflow acting in the central hole of the bobbin. To be supplied to.

[Problems to be solved by the invention]

In the above-mentioned dispensing device, the yarn connected between the bobbin and the suction mouth is tensioned by the suction force of the suction mouth, and the yarn cut at a certain length position is suddenly relaxed and acts inside the bobbin center hole. It is sucked by the suction force, but at this time, especially when handling heavier yarns such as hemp or yarns that are prone to warp such as strongly twisted yarns, the moment the yarn end sucked into the bobbin center hole enters the bobbin top hole. The twist returns to a twisted state (Y4) like a double thread as shown in Fig. 6, and the length of the thread end hanging in the center hole can only be half (2) of the desired length (1). is there.

Even in such a state, the yarn end has been successfully found,
Transported and supplied to the winder. Therefore, in splicing the bobbin with the bobbin, the yarn end length may be insufficient, and the splicing miss may occur because it cannot reach the relay pipe standing by above the bobbin.

The present invention aims to solve the above problems.

[Means for solving problems]

According to the present invention, a compressed air jet nozzle for jetting compressed air from the bobbin top hole toward the inside of the center hole is arranged above the top hole of the bobbin at the position where the lead-out yarn end of the bobbin is inserted into the bobbin center hole.

[Action]

When inserting the cut thread end into the bobbin center hole, a suction action is generated in the bobbin center hole, and compressed air is jetted from the upper side of the bobbin toward the top hole to prevent entanglement due to untwisting of the cut thread end. It is possible to insert the thread end having a predetermined length into the bobbin center hole.

〔Example〕

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

FIG. 7 shows an example of a so-called top bunch feeding device in which a bunch winding is formed on the head of a hobin.

Transport path (3) of bobbin (2) mounted on tray (1)
An annular transfer path (4) is provided following (3a), the receiving station (A) position of the annular transfer path (4) is connected to the carry-in path (3), and the bobbin of the annular transfer path (4) is dispensed. The position of the station (F) is connected to the carry-out path (3a), and a part of the annular transfer path, that is, the station (A) ▲-→ ▼ station (F) is used as the lead-out processing path, and the remaining path, that is, the station. (F), (G), and (H) are used as feedback passages for the misfeed bobbin.

The spinning bobbin (2) is transferred to the tray (1) in the direction of the arrow (5) while being inserted into the tray (1), and reaches the receiving position (A) of the dispensing device. Tray receiving parts (7) formed on the rotary plate (6) of the dispensing device at regular pitch intervals
The bobbin (2) received by is accompanied by the intermittent rotation of the rotary plate (6) in the direction of the arrow (8), passes through the processing stations (B) (C) (D) (E), and is delivered to the dispensing station (F). Upon arrival, the bobbin (2S) that has succeeded in getting out is conveyed toward the winder in the direction of the arrow (9) along the conveying path (3a).

A cutter device for unraveling the bottom bunch is installed in the station (B) only when a bobbin having a bottom bunch is handled, but in the present embodiment, since only the top bunch is installed, the cutter device is not installed. Bobbin only waits at station (B). At station (C), bobbin (2) backwind (1
A searcher mechanism called 0) for searching the wound yarn on the surface of the yarn layer is installed so that the backwind (10) is lifted from the surface of the yarn layer.

Next, in the station (D), the plucking / suction device (12) of the top bunch (11) is installed. For example, a pair of rollers (13a) (13b) pressed against the top bunch (11) part are provided with their rotation axes slightly inclined, and the top bunch (11) is released by the rotation of the rollers (13a) (13b). The thread that has been pulled out of the bobbin head is sucked into the suction pipe (14) having an opening near the bobbin head.

Further, in the station (E), a yarn end inserting mechanism (16) for cutting the yarn drawn from the bobbin into a certain length and inserting the yarn end into the central hole (15) of the bobbin (2) is provided. To be

1 to 4 show an example of the station (E). That is, the yarn (Y2) connected between the bobbin (2e) positioned at the station (E) and the slit (17) of the suction pipe (14) takes a certain yarn path by the tension due to the suction force. A cutter device (18) and a yarn sensor (19) into which the yarn is naturally introduced when the yarn path is taken are arranged at a set position from the upper end of the bobbin.

As the sensor (19), a photoelectric sensor, an electric capacitance type sensor, a sensor using a piezoelectric element, a whisker type micro switch or the like can be applied, but from the viewpoint of responsiveness, durability, certainty, etc. Photoelectric sensors are preferred.

The cutter device (18) has a movable blade (20), a fixed blade (21) and a driving blade (21) which are located across the slit (17) of the suction pipe (14) as shown in FIG. A cutter composed of a rotary solenoid (22) can be applied.

In FIGS. 3 and 4, (23) is a positioning guide plate for the bobbin (2e), which is fixed to the frame and has a smooth curved surface (23a) along the transfer path of the bobbin. The part, that is, the part (24) to which the top bunch is applied, comes into contact with the guide surface (23a) while pressing it slightly, and is positioned, and therefore the yarn drawn by the suction force of the yarn (Y2) connected to the suction pipe is The guide plate (23) is gripped at a contact point between the bobbin and the bobbin to prevent excessive loosening, and has an effect of restricting the yarn path between the bobbin and the suction pipe to a fixed position.

Further, in FIGS. 2 and 3, a compressed air jet nozzle (25) is arranged above the bobbin (2e) positioned at the station (E), and the jet outlet of the nozzle (25) is located at the bobbin center hole. The air jetted from the nozzle (25) flows into the bobbin center hole (15). In addition, the diameter of the jet outlet is sufficiently smaller than the inner diameter of the bobbin, and the jet fluid is set to flow into the bobbin center hole without spreading even if the nozzle has to be installed far away from the upper end surface of the bobbin. To be done.

Further, in the station (E), as shown in FIG. 3, a suction pipe (26) is arranged below the tray, and a fluid passage is provided in the tray for sucking the cut yarn end into the bobbin center hole. Has been formed. Therefore, the air flow rate (Q1) of the suction pipe that causes at least the suction force between the suction force of the suction pipe (26) and the jet force of the jet nozzle (25) and the air jetted from the jet nozzle (25). The force relationship is such that the relationship of Q1> Q2 is established between the flow rates (Q2). That is, if Q1 <Q2, the air flow from the nozzle (25) injected into the bobbin center hole may flow backward, and the yarn end may fly out of the center hole (15).

Therefore, at the station (E), it is prevented that the cut yarn end is twisted by sucking from below the bobbin and simultaneously spraying lightly from the top hole.

The timing of air injection from the nozzle (25) is from the state shown in FIG. 1 to the thread cutting, and the air injection (27) is started at least at the time when the thread cutting is performed. It is necessary. Of course suction pipe (26)
The same applies to the action of the suction air flow.

As described above, when the cutter (18) acts on the bobbin positioned at the station (E) to cut the yarn, the yarn waste on the suction pipe (26) side is sucked and removed, and the bobbin (2e ) Side fixed length yarn end (Y3) is smoothly inserted into the bobbin center hole (15) as shown in FIG. Instead, the thread end is inserted.

According to the experiment, for example, 100 bobbins were prepared, and 5 of these were prepared.
No air is blown from the nozzle (25), and the other 50
When the book was ejected with air blown from the nozzle (25), when there was no air blown from the nozzle, there was nearly half of the chattering as shown in Fig. 6,
When the nozzle was sprayed, the occurrence of chattering was zero.

In the above embodiment, an example in which the tray is used to transfer the bobbin is shown, but of course the present invention can be applied to a dispensing device that directly applies suction flow to the bobbin without using the tray.

〔The invention's effect〕

As described above, in the present invention, when the end yarn end of the bobbin is inserted into the center hole of the bobbin, suction force is applied from the bottom of the bobbin and air is blown from the top hole lightly. It is possible to surely insert the yarn into the center hole of the bobbin as a straight yarn end without causing chattering.

[Brief description of drawings]

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 schematic configuration diagram of a station (E), and FIG. 4 is a perspective view showing the shape of a guide plate (23). 5 and 5 are cross-sectional views showing a normal case of the bobbin in which the yarn end is inserted into the bobbin center hole, and FIG.
FIG. 7 is a schematic overall perspective view showing an example of a bobbin feeding device. (2) ...... Bobbin (15) ...... Center hole (25) ...... Compressed air injection nozzle (Y3) ...... Thread end

Claims (1)

[Claims] 1. A compressed air injection nozzle for injecting compressed air toward the inside of the bobbin center hole is disposed near the top hole of the bobbin at a position where the lead-out yarn end of the bobbin is inserted into the bobbin center hole. Yarn end device.