JP2759225B2 - Method and apparatus for fixing the winding end of a yarn wound on a bobbin - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for fixing a winding end of a yarn to be wound on a bobbin, and more particularly, to winding a flanged bobbin by cross winding with an automatic winding machine. The present invention relates to a method for fixing a winding end of a yarn to be wound, and an automatic winding machine to which the method is applied.

2. Description of the Related Art Automating the process from winding of a yarn to fixing the end of the yarn at the end of winding by an automatic winding machine is a very important issue due to demands for labor saving and cost reduction of products. Until now, various automatic winding machines have been researched and developed. In connection with this, it is important to develop a method of fixing the end of the winding of the yarn wound on the bobbin, and how to easily fix the end of the yarn is an automatic winding machine. It is not an exaggeration to say that development is affected.

As a method of fixing the yarn wound on the bobbin, a method disclosed so far is exemplified. For example, as shown in FIG. 4, the yarn is wound around one flange (20a) of a flanged bobbin (20). A method of forming a notch (21) and locking the yarn end to the notch, and, as shown in FIG. 5, a yarn groove for locking the yarn in one flange (22a) of the flanged bobbin (22). (23), and a method for locking the yarn end in the yarn groove (23). As shown in FIG. 6, a single-end bobbin (FIG. 6) having a flange (24a) on only one of the winding tubes. In the case of 24), as shown in FIG.
a) Attach the locking ring (25) to the outer peripheral edge of
There has been a method of locking the yarn end between the outer peripheral edge of the flange (24a) and the locking ring (25).

Further, in the method described in JP-A-53-103038, at least one end of the cylindrical winding tube or the winding tube having a flange formed on the outer periphery of the end, and the same inside of the winding tube. An elastic yarn gripper is provided movably in the axial direction of the take-in tube. Then, the yarn gripper is brought into close contact with the bobbin to fix a yarn end portion between the bobbin and the bobbin.

However, adopting such a conventional fixing method,
When designing an automatic winding machine that automates the process from winding the yarn to fixing the end of the yarn winding, complicated and delicate operation is required for the device. Since the cost and running cost are increased and the structure of the bobbin is significantly complicated, the manufacturing cost of the bobbin tends to be increased. in addition,
In the method of using the locking ring for a single end bobbin, an automatic winding machine having a mechanism capable of automatically fitting the locking ring to the outer peripheral edge of the flange to lock the yarn end is still provided. At present, the fitting of the locking ring is performed manually, and the working efficiency is extremely low, and therefore, the method of fixing the winding end portion of the thread which can be mechanically automated, and such a method. The development of an automatic winder to which is applied has been eagerly desired.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method by which the end of the winding of a thread wound on a bobbin can be fixed very easily.

Another object of the present invention is to provide an automatic winder having a simple structure for carrying out the method.

Means for Solving the Problems When the yarn is wound around a bobbin with a flange by cross-winding, the present inventors provide a winding end end of the yarn in a boundary region between the bobbin wound around the bobbin and the flange. Found that there is room for digging.

That is, when wound around a bobbin with a flange having flanges at both ends, it is not permitted to wind the bobbin beyond the distance between the two flanges, and ideally, the bobbin is formed to have the same width as this distance. However, at this time, a flanged bobbin corresponding to the thickness of the wound yarn must be provided.
However, when preparing a bobbin with a flange according to the thickness of the yarn, a very large number of types of bobbins are required, which is not practical.In practice, a yarn bobbin having several types of standardized flange intervals is used. Winding yarns of various thicknesses, the swing width of the yarn guide of the winding machine is set slightly narrower than the interval between the flanges, and there is a small room between the yarn wound around the bobbin and the flange. Will happen. Also,
When winding on a single-end bobbin with a flange on one side only, the thread guide always moves while contacting the bobbin, and the thread guide is as close as possible to the flange, but the thread guide guides the thread. The need to have a hole for the thread also creates a small room between the wound body and the flange.

Therefore, when the winding of the yarn is completed, the winding end end of the yarn is guided to the boundary region between the bobbin flange and the bobbin wound around the bobbin, and the bobbin is rotated. Is wound while biting into the space, and is easily locked.

The present invention is an application of this fact, and is a method for fixing the winding end of a yarn wound on a flanged bobbin by cross winding, wherein the winding of the yarn is completed after the winding of the yarn is completed. An end is guided to a boundary region between the bobbin wound around the bobbin and the flange of the bobbin, and a winding end end of the yarn is cut into a boundary region between the bobbin of the bobbin and the flange of the bobbin. And winding and locking it.

In an automatic winding machine for winding a yarn in a cross-winding manner on a bobbin with a flange for yarn winding, a bobbin holding means for rotatably holding the bobbin around its axis, and an outside of a bobbin forming portion of the bobbin A thread guide means for supplying a thread to the bobbin, the thread guide means being configured to reciprocate in a direction parallel to the rotation axis of the bobbin, and the bobbin and the thread guide means, At a position corresponding to the vicinity of a boundary region between the bobbin flange and the bobbin winding body, the yarn supplied from the yarn guide unit to the bobbin is arranged so as to be gently grasped, and a winding tension is applied to the bobbin. And the bobbin holding means rotates the bobbin while operating the yarn gripping means when the winding of the yarn is completed. An automatic winding machine having a winding end of the bobbin and control means for winding and locking the bobbin in a boundary region between the bobbin and the flange of the bobbin. It is.

Operation As described above, when a yarn is wound around a bobbin with a flange by cross winding, there is room to allow the winding end end of the yarn to bite into the boundary region between the bobbin wound around the bobbin and the flange. .

Therefore, after the winding of the yarn is completed, the end of the yarn is guided to the boundary region between the bobbin wound around the bobbin and the flange, and the end of the yarn is wound in the boundary region. It can be locked by biting into.

Further, in the automatic winding machine according to the present invention, when the winding of the yarn is completed, the yarn gripping means is operated, and the end of winding of the yarn is guided to the boundary region between the flange of the bobbin and the yarn winding body. In addition, while being applied with a larger winding tension than at the time of yarn winding, the yarn is wound and locked so as to bite into the boundary region between the bobbin flange and the yarn winding body.

In the case of a bobbin wound by parallel winding, when the yarn end is locked in the boundary area, the wound body may be broken, and the method according to the present invention cannot be applied well.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 schematically show the structure and operation of an automatic winding machine for carrying out the method according to the present invention. As shown in FIG. 1, an automatic winding machine according to the present invention comprises a yarn winding spindle (1) horizontally arranged at an upper yarn winding position, and a lower yarn end portion spaced downward from the spindle. At a fixed position, there is at least one set of spindles comprising a yarn end fixing spindle (2) arranged parallel to the yarn winding spindle (1). The tip of the lower thread end fixing spindle (2) is located at a position slightly retracted from the tip of the upper thread winding spindle (1). In the vicinity, it has a cylindrical shape, surrounds the outer periphery of the spindle shaft (1a), and
a) a thread holder (1) that can be advanced or retracted a small distance in the axial direction of the spindle without hindering the rotation
b).

A first bobbin pressing means (3) and a second bobbin pressing means (4) are arranged at positions axially spaced from the tips of the spindles (1) and (2), respectively. First bobbin holding means (3) and second bobbin holding means (3)
Bobbin pressing means (4) can reciprocate in the axial direction of the corresponding spindles (1) and (2), respectively.
A bobbin holding position for moving forward with respect to the spindles (1) and (2) and holding the bobbin between the spindles (1) and (2), and a holding state of the bobbin retreating from the spindles (1) and (2); And two positions for removing the bobbin. And a bobbin with a yarn winding flange (5)
Are rotatably held by the spindles (1) and (2) between the spindles (1) and (2) and the bobbin holding means (3) and (4) at the bobbin holding position. In FIG. 1, the first bobbin holding means (3) is at the bobbin holding position at the upper yarn winding position, and the yarn winding between the yarn winding spindle (1) and the first bobbin holding means (3) is performed. The bobbin (5) is held at the take-up position, while the second bobbin pressing means (4) is at the bobbin removal position at the lower thread end fixing position.

Above the yarn take-up spindle (1) and at a distance from it, a yarn guide means (6) is mounted so as to be able to reciprocate parallel to the axis of the yarn take-up spindle (1). Thus, the bobbin (5) held between the yarn winding spindle (1) and the first bobbin pressing means (3) is wound by cross winding.

In this embodiment, a bobbin (5) having a structure in which flanges (5a) and (5b) are formed at both ends of a cylindrical winding tube is used as a yarn winding bobbin. However, this embodiment is not only effective for a bobbin having such a structure, but is effective for any bobbin having a flange at at least one end of the winding tube. Note that there is.

As shown in FIG. 2, the bobbin gripping means (7) is movably arranged between the upper yarn winding position and the lower yarn end fixing position. The bobbin gripping means (7) has a structure capable of gripping the bobbin (8) portion of the bobbin (5) from both sides, in this embodiment, in the front-back direction toward the drawing, and the bobbin bobbin (5) at the upper stage. A path for moving forward or backward between the yarn winding spindle (1) and the first bobbin holding means (3) in the axial direction with respect to the yarn winding spindle (1); A path for reciprocating up and down with the yarn end fixing spindle (2), and a yarn end fixing spindle (2) in the axial direction with respect to the lower yarn end fixing spindle (2). The second bobbin pressing means (4) can move along an inverted U-shaped path consisting of a path moving forward or backward.

Immediately above the vicinity of the distal end of the thread end fixing spindle (2), it extends upward from a bobbin held between the thread end fixing spindle (2) and the second bobbin holding means (4). A yarn gripping means (9) capable of gently gripping the yarn at a position corresponding to a vicinity of a boundary region between the bobbin flange and the bobbin is disposed. This thread gripping means (9)
At least a portion protruding from the tip of the thread end fixing spindle (2) is disposed facing back and forth as viewed in the drawing, and the gripping position where the opposing surfaces are in contact with each other and the opposing surface are spaced from each other. It is formed as a grip (9a) having a pair of brake plates that can assume two positions, an open position. The grip portion (9a) is normally in an open state in which the brake plate is in an open position, and has a U-shaped cross section that opens forward (to the left in the figure) when viewed from above. Further, when gripping the yarn, the gripper (9a) moves the brake plate to a gripping position, and grips the yarn so as to be sandwiched between opposing surfaces of the brake plate. In this case, the yarn is gently grasped without being locked between the opposing surfaces of the brake plate.

Further, as shown in FIG. 3, between the upper yarn winding position and the lower yarn end fixing position, a yarn cutting means (13) provided with a heater for heating and cutting the yarn is provided. It is arranged so that it can enter or escape from the route. In addition, although not shown, the automatic winding machine according to the present invention includes a bobbin supply means for sequentially supplying new empty bobbins to the upper yarn winding spindle (1).

Further, a yarn winding spindle (1), a yarn end fixing spindle (2), first and second bobbin holding means (3) and (4), a yarn guide means (6), and a bobbin gripping means (7) ), The thread gripping means (9), the thread cutting means (13), and the bobbin supply means are connected to the control means (10), and their operations are controlled.

Hereinafter, the operation of the automatic winder will be described. After an empty bobbin with a flange is supplied to a yarn winding position of an upper yarn winding spindle (1) by a bobbin supply means (not shown), the yarn winding spindle (1) is rotatably driven by the yarn winding spindle (1). ) And the first bobbin pressing means (3), and while the yarn (12) is being unwound from the yarn guide means (6), the yarn is wound by cross winding in a known manner.

Then, as shown in FIG. 1, when a predetermined amount of yarn is wound on the bobbin (5) and the winding of the yarn is completed, the rotation of the yarn winding spindle (1), that is, the rotation of the bobbin (5) is started. Stop. At this time, the yarn guide means (6) stops at a position corresponding to the vicinity of the flange (5b) located on the spindle side (right side in the figure) of the bobbin (5). At this time,
Accordingly, the yarn winding point on the bobbin on the bobbin (5) side is also located near the flange (5b).

Then, after the bobbin gripping means (7) moves to the yarn winding position and grips the bobbin (5), the first bobbin holding means (3) moves from the bobbin holding position to the bobbin removing position, and The gripping means (7) is slightly retracted from the yarn winding spindle (1) in the axial direction of the spindle, and the bobbin (5) is removed from the yarn winding spindle (1). Thereafter, as shown in FIG. 2, the bobbin gripping means (7) descends while gripping the bobbin (5) for which the winding of the yarn has been completed. Move towards the tip of the spindle (2),
The outer end surface of the right flange (5b) of the bobbin (5) is pressed against the tip of the spindle (2). At this time, the yarn (13) unwound from the yarn guide means (6) following the movement of the bobbin (5) is close to the end surface of the yarn holder (1) of the yarn winding spindle (1). And reaches the bobbin (5) via a position intersecting with the spindle shaft (1a) and a straight path passing through the open gripping portion (9a) of the thread gripping means (9). At this time, the yarn holder (1b) of the upper yarn winding spindle (1) is at the retracted position.

Next, referring to FIG. 3, the second bobbin pressing means (3) at the bobbin removing position moves to the bobbin holding position, and the bobbin (5) is moved to the thread end fixing spindle (2).
Spindle for fixing the yarn end so that it can be driven to rotate (2)
After being held between the second bobbin holding means (4) and the second bobbin holding means (4), the bobbin holding means (7) releases the holding of the bobbin (5) and retreats from the thread end fixing position. Thereafter, the yarn gripping portion (9a) of the yarn gripping means (9) gently grips the yarn, and the yarn end fixing spindle (2) rotates in the same direction as the yarn winding spindle (1). As a result, the end of the bobbin is guided to the boundary region between the bobbin (8) of the bobbin (5) and the flange (5b) of the bobbin (5) while being subjected to a larger winding tension at the time of bobbin winding, It is wound and locked so as to bite into the boundary area.

Further, at the upper yarn winding position, a new empty bobbin (11) is supplied from the bobbin supply means to the yarn winding spindle (1), and the empty bobbin (11) is connected to the yarn winding spindle (1). The yarn holder (1b) of the yarn winding spindle (1) is held between the first bobbin pressing means (3) and the outside of the flange (11b) located on the spindle side of the empty bobbin (11). The yarn (12) tensioned between the yarn guide means (6) and the bobbin (5), which has been wound and held at the lower yarn end fixing position, is pushed forward so as to press the end surface. Then, the yarn holder (1b) is fixed between the outer end surface of the flange (11b) of the empty bobbin (11). Then, the yarn cutting means (13) is provided with a path for the yarn (12) stretched between the yarn holder (1b) and the outer end face of the flange (11b) of the bobbin (11) and the yarn gripping means (9). Invade.

After the yarn is separated by the yarn cutting means (13) between the bobbin (11) at the upper yarn winding position and the bobbin (5) at the lower yarn end fixing position, the yarn cutting means (13) The bobbin (5) retreats from the yarn path again, and the fixing of the yarn end is completed at the lower yarn end fixing position as shown in FIG.
Is again gripped by the bobbin gripping means (7), removed from the thread end fixing spindle (2), and then transferred to a predetermined position (not shown). At the same time, winding of the yarn on the empty bobbin (11) is started at the upper yarn winding position. By repeating the above operation, steps from winding of the yarn to fixing of the end of the yarn winding are automatically performed. These operations are controlled by the control means (10).

In this embodiment, the yarn end is fixed between the flange located on the spindle side and the bobbin. However, the yarn end is fixed between the flange located on the bobbin holding means and the bobbin. It is also possible to adopt a configuration in which the portion is fixed.

Further, in this embodiment, the automatic winding machine is configured to have at least one set of two spindles of a yarn winding spindle and a yarn end fixing spindle. , An automatic winding machine having the same operation and effect as in the case of the configuration including the two sets of spindles can be configured.

Thus, according to the method and apparatus according to the invention,
The end-of-winding end of the yarn can be extremely easily fixed to any type of bobbin with a flange on which the yarn is wound by cross winding. Accordingly, the structure of the automatic winder can be simplified as compared with the conventional one. Therefore, the manufacturing cost of the automatic winder can be kept lower than that of the conventional one. Further, since the winder operates relatively easily, it is hard to cause a failure and the running cost can be kept low. It becomes possible. Further, according to the present invention, it is possible to automate the operation of fixing the yarn end even for a single end bobbin where the yarn end is conventionally fixed manually.

Effect of the Invention As described above, according to the present invention, any type of bobbin can be used to fix the end of the thread very easily, as long as the bobbin is a cross-wound flange. it can. Therefore, in particular, in the case of a single end bobbin where the thread end is conventionally fixed manually, the fixing of the thread end can be automated, and the working efficiency can be greatly improved. Thus, the cost of the product can be reduced.

Further, since the automatic winder to which this method is applied has a very simple configuration, it is possible to reduce the manufacturing cost and the running cost of the automatic winder. That is, the method and apparatus according to the present invention significantly contribute to automation of the steps from winding of the yarn to fixing of the end of winding.

In addition, since a bobbin having an extremely simple structure can be used, the bobbin itself is provided at a low cost, and the contribution to the industry in this respect is very large.

[Brief description of the drawings]

1 to 4 are diagrams schematically showing the operation of one embodiment of an automatic winding machine for carrying out the method according to the present invention, and FIG. 1 shows a state where a yarn winding operation is completed. Schematic diagram showing
FIG. 2 is a schematic view showing a state where the bobbin for which the yarn winding has been completed has been moved to a yarn end fixing position by the bobbin gripping means;
FIG. 3 shows a state in which the yarn is cut between a new empty bobbin held by the yarn winding spindle and the bobbin in which the yarn end held by the yarn end fixing spindle is completely fixed. Schematic diagram, FIG. 4 shows that the yarn has been cut, and the yarn winding spindle starts the yarn winding on a new bobbin.
On the other hand, it is a schematic view showing a state in which the bobbin in which the yarn end has been completely fixed has been removed from the yarn end fixing spindle by the bobbin gripping means. FIG. 5 is a perspective view showing one conventional example of a bobbin having a structure for fixing a bobbin ending end, and FIG. 6 is another conventional example of a bobbin having a structure for fixing a bobbin ending end. FIG. 7 is a perspective view showing still another conventional example of a bobbin having a structure for fixing a thread winding end end. (1) Thread winding spindle (2) Thread end fixing spindle (3) First bobbin pressing means (4) Second bobbin pressing means (5) Bobbin with flange (6) Thread guide means (9) Thread grip means

Claims (2)

(57) [Claims] 1. A method for fixing a winding end of a yarn wound on a flanged bobbin by cross winding, wherein after the winding of the yarn is completed, the winding end of the yarn is wound on the bobbin. The bobbin is guided to a boundary region between the wound bobbin and the flange of the bobbin, and a winding end end of the yarn is bitten into a boundary region between the bobbin of the bobbin and the flange of the bobbin to be wound and locked. A method comprising: 2. An automatic winding machine for winding a yarn around a bobbin with a flange for yarn winding in a cross winding manner, comprising: a bobbin holding means for rotatably holding the bobbin around its axis; and forming a bobbin on the bobbin. A yarn guide means for supplying a yarn to the bobbin, the yarn guide means being located outside the section and being reciprocally movable in a direction parallel to the rotation axis of the bobbin; and between the bobbin and the yarn guide means. The yarn supplied from the yarn guide means to the bobbin at a position corresponding to a vicinity of a boundary region between the bobbin flange and the bobbin thread winding body is disposed so as to be able to gently grasp the yarn,
A yarn gripping means operable to apply a winding tension to the bobbin; and when the winding of the yarn is completed, the bobbin holding means rotates the bobbin while operating the yarn gripping means to wind the yarn. An automatic winder having a control means for winding and locking an end end to a bobbin of the bobbin and a boundary region of a flange of the bobbin.