JPH0524065B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Technical Field] The present invention relates to a spindle-type turret type (revolving type) automatic winding machine used in high-speed spinning or direct spinning and drawing of yarn, especially synthetic fiber yarn. Regarding the removal machine.

[Prior art] In recent years, turret-type automatic winding machines that automatically switch the yarn wound onto a bobbin have been widely adopted in the melt-spinning and winding process of synthetic fibers from the viewpoint of automation, labor saving, and speeding up. It has become like that. Such a winding machine is disclosed in Japanese Patent Publication No. 57-25466 and Japanese Patent Publication No. 57-25466.
As shown in Publication No. 49462, various improvements have been made and it has come into practical use, but recently, when high-speed winding exceeding 4000 to 6000 m/min is required, the function is Spindle drive type winders have been reviewed from above and are now being put into practical use.

Generally, a spindle drive type automatic winding machine is equipped with a drive source to actively drive the bobbin (spindle), a contact roller that rotates in contact with the bobbin (package), and a device that detects its rotation speed. The drive source is controlled so as to keep the circumferential speed of the bobbin constant.

In such a winding machine, since the turret rotates when switching yarns (bobbins), the fully wound bobbin, which is frictionally driving the contact roller, separates from the contact roller. For this reason, a circuit is often installed to temporarily interrupt circumferential speed control by the contact roller, for example around the rotation of the turret, until it comes into contact with the next empty bobbin.

When switching the yarn by rotating the turret and moving the positions of the fully wound bobbin and empty bobbin in this way,
When the fully wound bobbin leaves the contact roller, its speed is increased to increase the winding tension, and the empty bobbin that has run up to a predetermined speed comes into contact with the contact roller instead, and after the yarn is switched, the winding tension is increased. The circuit is activated to perform peripheral speed control. However, in this method, while the contact roller is in contact with the empty bobbin separated from the fully wound bobbin, it is in a free rotation state where it is not actively driven, so its speed is significantly lower than the normal winding speed during this time. In this state, if the contact roller came into contact with the empty bobbin that had run up to the normal winding speed, the speed of the empty bobbin (side spindle) would drop rapidly, making it impossible to perform stable yarn switching. .

To solve this problem, increase the run-up speed of the idle bobbin by some percentage compared to the winding speed so that the empty bobbin does not drop below the winding speed when it comes into contact with the contact roller. A method is used to ensure switchability.

However, in this case, as mentioned above, the contact roller is in a state where the winding speed is significantly lower than the normal winding speed, so when it comes into contact with the empty bobbin whose winding speed has been increased by some percentage, the surface layer of the paper tube of the empty bobbin will change due to the peripheral speed difference. Stripping and bursting often occur, and stable and reliable yarn switching cannot be expected, and there are also safety problems.

In order to solve this problem, a method has been used to ensure switching performance by using a high-speed paper tube with increased strength. However, in recent years, with the increase in winding speed, the higher the winding speed, the greater the speed reduction of the contact roller when switching the bobbin, and the need to further increase the strength of the paper core, resulting in a significant increase in the cost of the paper core. There was a problem with the price being high.

[Object of the Invention] The present invention has been made in view of the current situation, and provides a spindle drive type turret winding system that can perform stable and reliable bobbin switching without bursting the paper tube without using a high-speed paper tube with increased strength. The purpose is to provide a cutting machine.

[Structure of the Invention] In order to achieve the above object, the present invention has the following structure.

A rotatable turret that horizontally supports two forcibly driven spindles at equal intervals.The turret is held above the turret so that it can move up and down, and is attached to the spindle to respond to the increase in winding volume. It consists of a slide block that moves upwards, and a contact roller that is attached to the slide block and contacts the take-up bobbin inserted into the spindle and rotates by friction to control the drive of the spindle. When the spindle moves to the winding position, the slide block descends and the contact roller contacts and rotates with the bobbin on the spindle that moves to the winding position to change the paper strip. The slide block operates in conjunction with the rotation of the turret, and temporarily stops the descending of the slide block until the innermost yarn is formed on the empty bobbin, which is about to start winding anew, to keep the contact roller and the empty bobbin free. This is a spindle drive type automatic winding machine characterized by having a stopper that is kept in contact with the winder.

[Example] The present invention will be explained below based on the drawings. Fig. 1 is a schematic perspective view of a spindle drive type automatic winder showing an embodiment of the present invention, and Fig. 2 to 4 are explanatory diagrams of its operation.

In the figure, 1 and 2 are spindles (or bobbin holders) that are connected to bobbin B (in this example, a 4-piece type).
is fitted. The spindles 1 and 2 are supported horizontally by a turret (or turret arm) 3, and a spindle (not shown) that holds them is connected to a motor 4.
By driving and rotating the thread, thread switching can be performed.

Spindles 1 and 2 are supported at an interval of 180°C,
The rear end is connected to motors 5 and 6, and the motors 5 and 6 are connected to each other.
6, the individual spindles can be rotated.

A contact roller 7 is provided above the spindles 1 and 2 and is in contact with the spindles 1 and 2 and driven by friction. The contact roller 7 is in contact with the spindle (bobbin) during yarn winding to maintain a predetermined contact pressure or to control the rotational speed of the spindles 1 and 2, and is surrounded by a cover 8 as shown in the figure. ing. Further, a traverse box 10 having a traverse guide 9 for traversing the yarn is arranged substantially parallel to the position facing the contact roller 7. This traverse box 10 has a traverse guide 9 located above the traverse guide 9.
A plate-shaped thread removal guide 11 is provided which pushes the thread gripped and traversed toward the contact roller 7 side and removes the thread from the traverse guide 9. The thread removal guide 11 is rotated by operating a fluid pressure cylinder (not shown). The thread is removed by moving the thread.

On the cover 8 side facing the thread removal guide 11, an L-shaped bunch guide 12 is disposed so as to be movable in the axial direction of the contact roller 7 in correspondence with the thread removal guide 11. This bunch guide 12 is provided with a V-shaped guide groove corresponding to each bobbin B into which the thread removed from the traverse guide 9 is introduced by the operation of the thread removal guide 11, and the thread is completely wound when the thread is threaded. After forming a bunch winding on the package P, when the yarn engages with the slit groove of the empty bobbin B', a bunch winding is formed on the empty bobbin B', and then it moves in the axial direction of the contact roller 7 and transfers. It forms a tail and returns to its original position.

The contact roller 7 (cover 8) and the traverse box 10 have their rear ends mounted on two upright shafts 1.
The package is connected to a slide block 14 which is supported so as to be movable up and down along the line 3, and is adapted to apply a predetermined contact pressure to the package in accordance with winding. In addition, an air cylinder 15 is attached to the machine frame (machine base) on the side of the turret 3 to temporarily stop the descent of the slide block 14 when switching yarns, and the plunger 16 is fixed upward at the same time as the turret starts. The descent of the long protruding slide block 14 is temporarily stopped, the bunch guide 12 (thread removal guide 11) returns to its original position, and after a predetermined period of time (1 to several seconds) has elapsed, the plunger 16 is also retracted and returned to its original position. It is like that. In addition to this, the means for temporarily stopping the slide block 14 (contact roller 7) include a rack pinion, a screw drive,
Known reciprocating means such as electromagnetic force can be used as appropriate.

The position at which the slide block 14 is temporarily stopped is such that when the straight line connecting the centers of the fully wound package P and the empty bobbin B' is in the vertical direction, the gap between the contact roller 7 and the empty bobbin B' is 1 mm. set, but is not limited to this. Furthermore, the return of the plunger 16 can be adjusted as appropriate using a timer, etc., but specifically, it is based on the state in which the bottom layer yarn is completely buried on the bobbin surface (the state in which the winding layer is formed to such an extent that the surface cannot be seen). It is preferable that This is normally done by a timer as described above, but it is also possible to return the plunger 16 by detecting the surface of the bobbin with a detector such as a phototube to detect the above-mentioned condition.

In such a device, when the bobbin reaches the fully wound state (Fig. 2), the turret 3 starts rotating in response to the signal, and at the same time, the spindle 1 on the fully wound side starts rotating by 1.6%. As the speed increases, the air cylinder 15 operates and its plunger 16 rises (FIG. 3). Further, the bunch guide 12 also moves along the contact roller 7 toward its tip. The winding tension increases as the circumferential speed of the fully wound package P increases and eventually settles down to a constant tension. After this, when the thread removal guide 11 operates, the traversing thread Y is released from the traverse guide 9 and enters the guide groove of the bunch guide 12, where its position is fixed and a bunch winding is formed around the outer periphery of the package P in the turret. .

As the turret 3 further rotates, the yarn Y connected to the package P becomes an empty bobbin whose speed has been increased in advance.
The yarn comes into contact with the outer circumferential surface of B' and is caught by the slit groove for catching the yarn carved in the empty bobbin B'. (Although it is moved outward in the axial direction by means similar to the mechanism described in the publication, it is not limited thereto). As a result of this capture, the yarn Y is cut between the package and the empty bobbin and switched to the empty bobbin side, and a bunch winding is formed at a position outside the normal twill range on the tip side of the bobbin B' (this is not necessarily required). At this time, the slide block 14 is supported by the plunger 16 and its descent is interrupted, so the contact roller 7
is not in contact with bobbin B′.

Next, the bunch guide 12 returns to its original position with its guide groove within the yarn traverse area, during which a pigtail (transfer tail) winding is formed, and the thread removal guide 11 returns to its original position, and Therefore, the yarn is captured by the traverse guide 9 and wound while being traversed. Thereafter, the plunger 16 of the air cylinder 15 descends, and the contact roller 7 comes into contact with the bobbin B', after which normal winding is performed (FIG. 4).

In this case, the slide block 14 is lowered by the downward movement of the plunger 16, and the contact roller 7 in a decelerated state comes into contact with the bobbin B', but the contact is first made with the lowermost yarn on the bobbin B' that was formed first.
Since this is done indirectly via P', sudden contact impulses are greatly alleviated, and there is no possibility of damage to the bobbin as in the conventional case.

Such circumferential speed difference (usually around 40 to 80 m/min)
Since the contact roller and the bobbin do not come into direct contact with each other but through the thread layer, the surface layer of the paper tube does not peel off or burst, even if a high-speed paper tube with increased strength is not used. Moreover, reliable bobbin switching can be performed.

The above explained the case of free rotation in which the contact roller 7 contacts the bobbin and rotates by friction.
It goes without saying that the same application is also possible in the case where the intensity is driven by a motor or the like. In this case, the contact roller is not limited to being forcibly driven (actively driven) all the time during winding, but may be forcibly driven only when switching paper strips.

[Effects of the Invention] As explained above, according to the present invention, the bobbin can be switched stably and reliably without the paper core being damaged even without using a high-speed paper core with increased strength. This is extremely effective in terms of safety as well as suppressing the increase in running costs due to increased winding speed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an apparatus showing an embodiment of the present invention;
2 to 4 are explanatory diagrams of the operation of the device shown in FIG. 1, respectively. 1, 2... Bobbin holder, 3... Turret,
7... Contact roller, 11... Thread removal guide, 12... Bunch guide, 14... Slide block, 15... Air cylinder, 16... Plunger.

Claims (1)

[Claims] 1. A rotatable turret that horizontally supports two forcibly driven spindles at equal intervals. The turret is held above the turret so that it can move up and down, and is used to increase the winding volume of the take-up bobbin that is inserted into the spindle. It consists of a slide block that moves upward according to the rotation of the turret, and a contact roller that is attached to the slide block and contacts the take-up bobbin that is inserted into the spindle and rotates by friction to control the drive of the spindle. Spindle drive type automatic winding in which the slide block moves down as the side spindle moves to the winding position, and the contact roller contacts and rotates with the bobbin on the spindle that moves to the winding position to change the yarn. The machine operates in conjunction with the rotation of the turret, and temporarily stops the descending of the slide block until the innermost yarn is formed on the empty bobbin, which is about to start winding anew, and then separates the contact roller and empty bobbin. A spindle drive automatic winder characterized by having a stopper that maintains the winder in a non-contact state.