JPH0730619Y2 - Bunch unwinding device - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a bunch winding unwinding device for unwinding a bunch winding of a yarn end provided on a bobbin of a package.

[Prior Art] The present applicant has previously proposed a device for automatically unwinding a bunch winding applied to a bobbin of a package ("bunch unwinding device", JP-A-63-258377).

As shown in FIG. 3, this apparatus is provided with a bunch unwinding preparation roller 1 for exposing the yarn end (starting end) of the bunch winding to be unwound.

The roller 1 is held in the vicinity of the bobbin (paper tube) 3 of the package P by a roller support member 2 and is pressed or separated from the bobbin 3 by its operation.

The roller support member 2 is provided side by side with a bobbin support body 4 that performs a bobbin chuck via a rotary cylinder 5 that is slidable in the circumferential direction, and is linked to the operation thereof. That is,
The operation pin 6 connected to one end of the roller support member 2 is
It is attached to a chuck body 7 that can move relatively in the axial direction, and when the movable chuck body 7 moves to cause the bobbin support body 4 to substantially expand in diameter and chuck the bobbin 3,
The roller support member 2 swings around the rotary shaft 8 so that the roller 1 provided on the other end side is brought into pressure contact with the outer peripheral surface of the bobbin 3.

Then, by rotating the pulley 9 attached to the rotating tubular body 5 to revolve the roller 1 in the direction opposite to the winding direction of the bunch winding, the yarns near the nip point where the bunch winding moves to the main winding are sequentially packaged. The yarn is moved to the P side so that the starting end of the lower layer is exposed on the bobbin 3 surface.

By sending the package P processed in this way to the next stage and pulling out the exposed start end of the bunch winding by the bunch winding unwinding roller and the yarn suction means (both not shown),
It has become possible to secure the unwound yarn end to a fixed length required for the next step (thread winding).

In addition, this bunch unwinding device automatically uses the package P
The yarn knotting device for tying the yarn ends on the surface layer is arranged side by side, and the yarn knotting operation and the bunch unwinding preparation for the starting end are performed on the same stage.

[Problems to be Solved by the Invention] Since the conventional bunch unwinding and unwinding preparation roller 1 is adapted to press the bobbin 3 in an interlocking manner with the operation of the bobbin support 4 chucking, the condition of the chuck is Due to this, the contact pressure is not stable, and there is a problem in that the feeding movement of the bunch-wound yarn is not accurate.

If the feeding is not accurate, the starting end may not be exposed and the yarn may be unwound.

Therefore, in view of the above circumstances, the present invention was devised to provide a bunch unwinding device having a bunch unwinding preparation roller in which the feeding movement of the bunch winding yarn is accurate.

[Means for Solving the Problems] The present invention provides a bunch winding having a bunch winding unwinding preparation roller which presses a bunch wound bobbin of a detachably held package to expose its yarn end. The unwinding device includes a roller supporting member that movably supports the roller, and a supporting member operating means that is provided independently of the package holding system and operates the roller supporting member to press or separate the roller from the bobbin. It is a thing.

[Operation] With the above configuration, the support member actuating means actuates the roller support member as necessary, irrespective of the operation of the holding system that holds the package. Bunch roll unwinding preparation roller,
When the roller supporting member is operated, the bobbin is pressed against the bobbin to expose the end of the bunch, and the bunch is unwound.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.
1 and 2 show an embodiment of the bunch unwinding device according to the present invention. The same components as those of the conventional device are designated by the same reference numerals, and the description thereof will be omitted.

This device has a bunch unwinding and unwinding preparation roller 1 that presses against the bobbin 3 of the package P held by the bobbin support 4 as in the conventional device, and supports the roller 1 movably. It is provided with a roller support member 11 and a support member actuating means 12 provided independently of the bobbin support 4 which is a holding system for the package P.

The roller support member 11 is a rod body extending substantially in the radial direction on the side of the package P on which the bunch is wound, and rotates the roller 1 via an arm 13 that is appropriately bent and extended to the upper end side. Supports freely. The lower end side is supported via a stud 15 on a stay 14 fixed to the rotary cylinder body 5 similar to the conventional one.

The stud 15 extends in a direction orthogonal to the roller support member 11, has one end fixed to the stay 14 and the other end pivotally supported by the lower end of the roller support member 11. Therefore, the roller support member 11 can be tilted substantially along the axial direction.

Further, a lever 16 is attached in the middle of the stud 15, and a spring 17 provided between the lever 16 and the roller support member 11.
The roller support member 11 is biased in the counterclockwise direction in FIG. That is, the roller support member 11 is urged toward the side where the roller 1 is separated from the bobbin 3 of the package P.

The support member actuating means 12 includes an air cylinder 19 provided on a frame 18 that holds the bobbin support 4 and the like, and an air cylinder.
The ring body 22 is mainly constituted by a ring body 22 connected to the plate 19 via a plate 20 and a stud 21, and one end surface of the ring body 22 engages with an upper end portion 23 of the roller support member 11.

The air cylinders 19 are axially extended and attached to the frame 18 via brackets 24, and three air cylinders 19 are provided at equal intervals in the circumferential direction so as to surround the bobbin support 4.

Four studs 21 are bolted to the plate 20,
The expansion / contraction movement of the rod 25 of the air cylinder 19 is transmitted to them. Further, the studs 21 are provided with springs 27 locked to the other frame 26 so as to urge the plate 20 and the like toward the retracted side of the rod 25.

The ring body 22 is fixed to the tip of the stud 21, and the thrust bearing 28 is housed in the fixed position.
The roller support member 11 is brought into contact with this portion. On the other hand, the upper end portion 23 of the roller support member 11 is provided with a bearing roller 29 supported so as to be rotatable in the radial direction. That is, these bearings 28,29
By abutting each other, the ring body 22 and the roller support member 11
Are slidable in the circumferential direction, and the pushing force in the axial direction from the air cylinder 19 is smoothly transmitted to the arc-shaped tilting force to the roller supporting member 11.

Therefore, when the rod 25 of the air cylinder 19 is extended, the roller support member 11 tilts toward the package P side, and the roller 1 comes into pressure contact with the bobbin 3.

In addition to this, the bobbin support 11 is provided with a pulley 30 connected to the rotary cylinder 5, and is driven by a belt from a drive source (not shown) to pass through the rotary cylinder 5 and the roller support member 11. The bunch roll unwinding preparation roller 1 is revolved around the sun.

Next, the operation of this embodiment will be described.

When the package P whose start end is bunch-wound is conveyed to a predetermined position, the bobbin support 4 is inserted into the bobbin 3 and holds it.

In this state, air is supplied to the air cylinder 19, and the rod 25 thereof is extended in the axial direction. This movement is sequentially transmitted to the ring body 22 via the plate 20 and the stud 21, and pushes the roller support member 11 to the package P side. The roller support member 11 tilts with the stud 15 as a fulcrum so that the upper end portion 23 approaches the bobbin 3, and the bunch unwinding preparation roller 1 comes into contact with the outer peripheral surface of the bunch wound bobbin 3.

In this posture, the roller 1 is revolved by the pulley 30 along the outer peripheral surface of the bobbin 3, and the yarn near the nip point where the bunch winding moves to the main winding is sequentially moved to the package P side,
The starting end of the lower layer is exposed on the bobbin 3 surface.

After the roller 1 has rotated a predetermined number of rotations sufficient to expose the starting end, the rotation of the pulley 30 is stopped and the air cylinder
Air supply to 19 is stopped. The support member actuating means 12 is
The urging force of the spring 27 retracts in the direction opposite to the package P and returns to the standby posture. Similarly, the roller support member 11 tilts in the opposite direction to separate the roller 1 from the bobbin 3.

Then, the package P having the exposed start end of the bunch winding is conveyed to the next stage and provided for unwinding the bunch winding.

In this way, the roller supporting member 11 that supports the bunch unwinding preparation roller 1 is provided with the supporting member operating means 12 that is operated separately from the bobbin support 4, so that the roller 1 can be brought into contact with and separated from the roller supporting member 11. Therefore, a desired contact pressure can be obtained when the roller 1 is pressed against the bobbin 3, the bunch winding can be reliably fed, and the subsequent bunch winding unwinding can be performed accurately.

Further, the unwinding preparation operation by the bobbin unwinding device of the present invention is not affected by the yarn knotting even when the knotting is performed in the same stage. That is, the thread knotting at the end by the thread knotting device (not shown) is performed by rotating the bobbin support 4 around the axis and appropriately rotating the package P held therein. Therefore, conventionally, even if the pulley 9 for rotating the roller 1 is stopped, the package P rotates in the forward and reverse directions along with the yarn knotting operation, so that the pressure-contacted roller 1 revolves relatively. There is a problem that a certain amount of stable feeding cannot be achieved because an operation different from the original yarn feeding is performed.

According to the present invention, the roller 1 can be separated from the bobbin 3 when the bobbin support 4 is chucking the bobbin to perform thread knotting. Therefore, the conventional extra revolution operation is prevented. is there.

Even if it is necessary to change the contact pressure of the roller 1 depending on the winding tension of the package P and the yarn type, according to the present embodiment, the plate 20 and the ring body 22 are connected by the bolt fastening portion of the stud 21. Since the contact pressure can be substantially changed by changing the distance, it is extremely versatile.

[Effects of the Invention] In short, according to the present invention, the following excellent effects are exhibited.

And a roller supporting member for movably supporting the bunch unwinding preparation roller, and a supporting member operating means provided independently of the package holding system for operating the roller supporting member to press or separate the roller from the bobbin. Therefore, regardless of the holding operation of the package, the roller can be pressed against the bobbin with a predetermined contact pressure, and accurate bunch unwinding can be performed.

[Brief description of drawings]

1 is a side view showing an embodiment of a bunch unwinding device according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view showing a conventional bunch unwinding device. In the figure, 1 is a bunch unwinding preparation roller, 3 is a bobbin, 11 is a roller supporting member, and 12 is a supporting member operating means.

Claims (1)

[Scope of utility model registration request] 1. A bunch unwinding device having a bunch unwinding preparation roller that presses a bunch-wound bobbin of a package held detachably to expose the yarn end thereof. A roller support member that is movably supported; and a support member operating means that is provided independently of the holding system of the package and operates the roller support member to press or separate the roller from the bobbin. Bunch unwinding device.