JPH0338188B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention provides two sets of bobbin holders on a rotatable turret, and when a package of a predetermined amount of winding is formed on the bobbin attached to one bobbin holder, the package is transferred to the other bobbin holder. The present invention relates to a method and device for automatically switching the yarn to be wound in a turret type automatic winder, which automatically switches the yarn to an installed empty bobbin.

Conventional technology Conventionally, in a turret type automatic winding machine, after the yarn is threaded from a full bobbin to a new empty bobbin and cut, the end of the thread on the surface of the full bobbin is wound onto the empty bobbin that has started winding. Therefore, as shown in Japanese Unexamined Patent Publication No. 54-64148, a means for inserting a separator between the full bobbin and the empty bobbin is provided, and furthermore, as described in Japanese Unexamined Utility Model No. 56-103558, In addition to the separator, a device in which compressed air is injected between the bobbins is used as shown in the figure.

However, in order to prevent the thread end of the full bobbin from wrapping around the empty bobbin, these conventional devices maintain a separator or a compressed air injection nozzle between the bobbins until the full bobbin is removed from the bobbin holder. As a result, the following problems have arisen: That is, as mentioned above, a separator is inserted between a fully wound bobbin and an empty bobbin, but the interval between these bobbins is narrow, and the separator inserted into this narrow space requires winding at a speed of several thousand meters per minute. Since the empty bobbin is wound thickly with thread, the thread wound on the separator comes into contact with the separator within a short time. For this reason, it was necessary to doff the fully wound bobbin as quickly as possible after the yarn changeover was completed.

If doffing is done manually as in the past, there will be little problem if the full bobbin is removed one after another each time the thread is changed, but if the automatic doffing machine as described above is used In order to achieve automation, unmanned operation, and labor saving in combination with the above, it is usual to process a large number of winding machines, up to several tens of machines, for one automatic doffing machine.

Therefore, in order to perform automatic doffing as efficiently as possible, doffing should be performed immediately before the yarn wound on the empty bobbin contacts the separator. In this way, the number of winding machines to be processed by one automatic doffing machine can be increased, and its utilization can be maximized. However, it is not desirable from a safety standpoint to keep the separator between the bobbins from the time the yarn is switched until the bobbin is fully doffed, and it is not desirable from a cost standpoint to inject pressurized air during this period. It will also be disadvantageous.

The biggest problem is that it is not possible to change conditions such as increasing the amount of winding or increasing the winding speed, or to change the brand.

Purpose: In view of these problems, the present invention provides flexibility that makes it possible to increase winding volume (LP) and increase speed without changing the circulation time of an automatic doffing machine or the unloading interval of a fully wound bobbin. The object of the present invention is to provide a method and device for automatically switching the winding yarn, which can completely prevent yarn entanglement and have a high level of winding.

For this purpose, the present invention has the following configuration.

Structure and operation Two sets of bobbin holders are provided on a rotatable turret, and when a predetermined amount of package is formed on the bobbin attached to one bobbin holder, the package is automatically placed on the empty bobbin attached to the other bobbin holder. When switching the winding yarn, immediately after the yarn is switched to the empty bobbin, a shield plate is inserted between the package cage and the empty bobbin to prevent the end of the package yarn from being caught. The yarn ends are rotated while floating from the surface, and the yarn ends are brought into contact with a gluing device disposed on the side of the package cage to apply liquid glue to the package yarn ends, and then the yarn ends are attached to the package cage. A method for automatically switching a winding yarn, the method comprising: contacting the package to glue the yarn end to the package; and then returning the shielding plate to a position on the side of the turret.
A rotatable turret is equipped with two sets of bobbin holders, and when a predetermined amount of package is formed on the bobbin attached to one bobbin holder, it is automatically wound onto the empty bobbin attached to the other bobbin holder. In a yarn switching device, when the yarn is switched to an empty bobbin, it is connected to two hydraulic cylinders located above and below that protrude between the package and the empty bobbin to prevent the package cage yarn end from being caught. A shielding plate consisting of a first shielding plate supported by a link mechanism and a second shielding plate attached to the first shielding plate so as to be fully reversible is provided on one side of the turret, and a bobbin holder and a bobbin holder are provided on the other side. A gluing device for the end of the package thread is provided in parallel, consisting of a sponge impregnated with liquid glue and a roller movably held toward the package cage for adhering the end of the package thread to the package. This is an automatic switching device for winding yarn.

Hereinafter, the present invention will be specifically explained based on the drawings.

FIGS. 1 and 2 are a schematic front view and an operation explanatory view of a winding machine, which is an example of a device suitable for carrying out the present invention. In the figure, reference numeral 1 denotes a machine frame held on a support stand 36, and a friction head 2 supported vertically and movably by a hydraulic cylinder (not shown) is disposed on the machine frame 1. The friction head 2 includes a traverse box 3 having a traverse guide for traversing the yarn, a rotationally driven friction roller 5 covered with a cover 4, etc. It is designed to move up and down.

Reference numeral 6 denotes a turret located below the friction head 2, which is rotatably mounted around a support shaft 7. Two bobbin holders 8 and 9 are mounted on the turret 6 symmetrically with the center of rotation in between. It is rotatably supported. A pusher 10 pushes out the bobbins B ₁ and B ₂ inserted into the bobbin holders 8 and 9. Since such automatic winding machines are generally widely known, other detailed mechanisms will be omitted.

11 is the package yarn end y at the time of yarn switching
This is a device that prevents the machine from getting caught in the machine, and is stored on the side of the machine frame 1 when it is not in operation. This device 1
1 has two hydraulic cylinders 12 and 13 installed upright in two positions, upper and lower, and is rotatable by pins 14 and 15 on plungers 12' and 13' of the hydraulic cylinders 12 and 13, respectively. Connected arms 16 and 17, the other end of arm 17 and pin 1
a first shielding plate 19 rotatably connected by 8;
The second shielding plate 2 is provided so as to be movable back and forth in the vertical direction (based on the state when stored) by a fluid pressure cylinder 20 mounted on the first shielding plate 19.
1. An arm 22 rotatably connected to the upper end of the first shielding plate 19 by a pin connection, a connecting rod 25 rotatably connecting the arm 16 and the arm 22 by pins 23 and 24, etc. configured.
In addition, it is preferable to use a link mechanism like this because it does not take up space when stored and can be made compact.
It is not limited to this. Reference numeral 26 denotes a gluing device for the end of the package yarn provided at the lower left end of the machine frame 1, and has a sponge 28 impregnated with liquid glue on a holder 27. Reference numeral 29 is a cover which also serves as a guide for the yarn end, and the upper part of the sponge 28 is made to protrude from a slit cut in the cover 29. Furthermore, guides 30 are provided protruding from both ends of the sponge 28 in the direction of the bobbin holder 9. Reference numeral 31 is a glue injection pipe opened at the lower end of the sponge 28 and connected to a head tank or pump (not shown), so that an appropriate amount of glue can be fed as needed.

Here, in the present invention, gluing means temporarily attaching the end of the package thread to the package surface, and generally speaking, it is not possible to make it semi-permanently or long-term fixed using a glue material. Although it is not necessary, it is preferable that the adhesive be attached using an oil agent that provides the adhesive force required to prevent entrainment.

A roller 32 is disposed near the sponge 28 (cover 29) and parallel to the bobbin holder 9, and is rotatably supported by an arm 33 rotatably connected to the side end surface of the holder 27 with a pin. Further, a plunger 35 of a fluid pressure cylinder 34 attached to the machine frame 1 is connected to the intermediate portion of the arm 33. A timer is connected to this fluid pressure cylinder 34, and when the turret 6 operates at the time of yarn switching, it starts operating in conjunction with this, and immediately before the package P formed on the bobbin stops (2 When the timer times up, the cylinder 34 is actuated to bring the roller 32 close to or in contact with the package P.

When a package P having a predetermined winding amount is formed on the bobbin B ₁ in such an automatic winding machine,
The turret 6 begins to rotate, and yarn switching begins. By switching the run-up roller (not shown), the empty bobbin B ₂ and the fully wound bobbin B ₁ (package P) are forcibly driven, and the empty bobbin B ₂ is slit or moved by the operation of the thread removal and thread shifting mechanism, etc. The yarn is gripped by the thread gripping section and the package P and empty bobbin B ₂
The yarn connected between the bobbin and the yarn is cut and the yarn is empty.
At the same time as switching to the _B2 side, the fluid pressure cylinders 12 and 13 operate.

When the yarn is switched to the empty bobbin _B2 side, the turret 6 has rotated approximately 180 degrees (Fig. 1), and when this position is reached, a signal is generated by a detection means such as a limit switch or a phototube. The hydraulic cylinders 12 and 13 are activated. As a result of this operation, the plungers 12', 13' move forward and first approach the first shielding plate 19, the empty bobbin _B2 , and the package P so as to separate them. Next, the fluid pressure cylinder 20 is activated and the second shielding plate 21 is activated.
moves forward along the first shielding plate 19, and the empty bobbin B ₂
It passes through the narrow space between the bobbin and the package P and reaches a position where these two bobbins are almost separated and shielded (FIG. 2). The bobbin holder 9 that supports the package P is braked and stops after a predetermined time, but
Due to this braking, the thread ends y of the package P are easily separated and rotated with a certain length floating. However, this yarn end y is
Since it is in a state where it is separated from the empty bobbin _B2 by this, it will not be drawn into the empty bobbin _B2 side by the accompanying flow or suction flow caused by the rotation of the empty bobbin _B2 .

When the rotation of the package P decreases and is about to stop, the fluid pressure cylinder 34 operates as described above, and the roller 32 lightly contacts the package surface and presses the separated yarn end y against the package P surface (see Fig. 2). ). At this time, the yarn end y comes into contact with the surface of the sponge 28 of the gluing device 26 and is sufficiently coated with oil, so that the roller 32 presses the surface of the package to glue and temporarily adhere to the surface of the package P. It turns out. At this time, it is preferable to use the same oil that was applied before winding, and usually the ends of the yarn that are attached to the package by the oil will hardly separate until the next processing step. fulfill its role.

After that, the bobbin holder 9 holding the package P stops in a short time, but immediately after the bobbin holder 9 stops, first the fluid pressure cylinder 2
0 is activated and the second shielding plate 21 is moved back to its original position, the limit switch or proximity switch is activated and the hydraulic cylinders 12 and 13 are activated. This operation causes the first shielding plate 19, the connecting rod 25, etc. to move and return to the side position of the machine frame 1, returning to the stored state.

The method of operating the fluid pressure cylinder 20 is to set a stop time in advance using a timer and operate it in conjunction with the time up; however, the method is not limited to this, and other methods such as the bobbin holder 9 may be used. Needless to say, it is also possible to detect the stoppage of the bobbin or the bobbin holder 9 by using a phototube to detect the stoppage of the bobbin or the bobbin holder 9. The time at which the entrainment prevention device 11 is returned is approximately at the same time as the stop of the package P, that is, at the same time, immediately before, or immediately after, but preferably at the same time or immediately after.

Due to this operation, the package P and empty bobbin
_B2 , the shielding plates 19 and 21 return to their original positions within a short time after the yarn switching, so that there is no obstruction between these two bobbins. Therefore, increasing the winding amount and extending the doffing time are not significantly restricted as in the past. Note that the length of the first and second shielding plates 19, 21, sponge 28, cover 29, roller 32, etc. is approximately equal to the length of the package, bobbin (multiple tips), or bobbin holder, regardless of the single tip or multiple tip type. This is preferable from the viewpoint of reliability, operability, structure, etc., but when bunch winding or the like is performed, the length may be limited to a length corresponding to the position. Further, the present invention is not limited to the friction roller type winding machine as shown in the embodiment, but can also be applied to a directly driven spindle type winding machine.

Effects As described above, in the present invention, when the yarn is switched, a shielding plate is inserted between the package and the empty bobbin to which the yarn has been switched, and these spaces are separated and the end of the package and yarn is separated. After preventing the yarn from being entangled, the end of the yarn is glued to the surface of the package, and the shield plate returns to its original position almost at the same time as the package stops rotating. This completely prevents the yarn end of the package cage from being wound into the empty bobbin side, and at the same time it is possible to increase the winding amount and extend the dotting time (increasing the number of automatic doffing operations).
Moreover, since the yarn ends are not separated by gluing, it is very easy to handle until the next processing, and the effect is extremely large. In addition, since the shielding plate and the gluing device are arranged on the sides of the turret so as to sandwich it, and the shielding plate is of a two-stage advance type, it is possible to reliably partition the package cage and the empty bobbin, and also to It also has the remarkable effect of becoming more compact.

[Brief explanation of drawings]

FIGS. 1 and 2 are a schematic front view and an operation explanatory diagram showing an example of an apparatus suitable for carrying out the present invention. 1... Machine frame, 6... Turret, 8, 9... Bobbin holder, 11... Entanglement prevention device, 12, 1
3...Fluid pressure cylinder, 19...First shielding plate,
21... Second shielding plate, 26... Gluing device, 28...
...Sponge, 32...Roller, 34...Fluid pressure cylinder.

Claims (1)

[Claims] 1. Two sets of bobbin holders are provided on a rotatable turret, and when a package of a predetermined amount of winding is formed on the bobbin attached to one bobbin holder, an empty bobbin attached to the other bobbin holder is disposed. When automatically switching the yarn to be wound, immediately after the yarn is switched to the empty bobbin, a shielding plate is inserted between the package cage and the empty bobbin to prevent the end of the package yarn from being caught. The rear package cage is rotated while floating the yarn ends from its surface, and the yarn ends are brought into contact with a gluing device disposed on the side of the package cage to apply liquid glue to the package yarn ends, and then the yarn ends are attached to the package cage yarn ends. 1. A method for automatically switching a wound yarn, comprising: bringing the end of the yarn into contact with the package, gluing the yarn end to the package, and then returning the shielding plate to a position on the side of the turret. 2. Two sets of bobbin holders are installed on a rotatable turret, and when a predetermined amount of package is formed on the bobbin attached to one bobbin holder, the package is automatically wound onto the empty bobbin attached to the other bobbin holder. In a yarn switching device, when the yarn is switched to an empty bobbin, it is connected to two hydraulic cylinders located above and below that protrude between the package and the empty bobbin to prevent the package cage yarn end from being caught. A shielding plate consisting of a first shielding plate supported by a link mechanism and a second shielding plate attached to the first shielding plate so as to be movable back and forth is provided on one side of the turret, and a bobbin holder and a bobbin holder are provided on the other side. A gluing device for the end of the package thread is disposed in parallel with a sponge impregnated with liquid glue and a roller movably held toward the package cage for adhering the end of the package thread to the package. Automatic switching device for winding yarn.