JP2871293B2 - Spinning winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning winder for winding a yarn spun from a spinning machine at a high speed, and more particularly to an apparatus for reducing vibration of a bobbin holder mounted with a package when the bobbin holder is stopped.

[0002]

2. Description of the Related Art First, an entire spinning winder will be described with reference to FIG. 3 (side view) and FIG. 4 (front view). The take-up winder 1 includes a turret plate 4 rotating around a horizontal axis 3 with respect to a main body frame 2, two bobbin holders 5 and 6 protruding from the turret plate 4, and fixed to the back of the turret plate 4. Induction motors 7 and 8 for rotating and driving the bobbin holders 5 and 6; a slide box 10 which is guided by a support 9 in the main body frame 2 to vertically move up and down; and a contact pressure roller supported by the slide box 10 11 and the traverse device 1 also supported by the slide box 10
2 mainly. And the contact pressure roller 11
Box 10 that supports the traverse device 12
The whole weight is supported by the contact pressure cylinder 13 provided on the slide box 10 side, and the difference between this weight and the lifting force by the contact pressure cylinder 13 becomes the contact pressure of the contact pressure roller 11 against the package P. I have. B is a bobbin, P is a package wound on the bobbin,
Y denotes a thread from the spinning machine, 2a denotes a fixed arm portion projecting from the main body frame 2 and having an operation panel provided at the end thereof. The reason why the two bobbin holders 5, 6 protrude from the turret disc 4 in the spinning winder as described above is as follows. The upper bobbin holder 5 is at the winding position a, and the yarn Y is wound on the bobbin B. On the other hand, the lower bobbin holder 6 is at the standby position b, the illustrated package P is removed, and a new bobbin B is mounted. Then, when the package of the bobbin holder 5 at the winding position a is fully wound, the turret 4 is rotated by 180 °, and winding on the bobbin B at the new winding position a is started. In this way, the continuously supplied yarn is alternately wound by the two bobbin holders. That is, the bobbin holder 5 at the winding position a is rotating at high speed, but the bobbin holder 6 at the standby position b is almost stopped.

Next, an example of the structure of the bobbin holder 6 will be described with reference to FIG. The bobbin holder 6 has a rotating cylinder 22, a cap 23, a spacer ring 24, and a rubber ring 25 as main components. The rotating cylinder 22 is a base material that holds the bobbin B, and is fixed to a drive shaft 28 by a rib 27 in the rotating cylinder 22. The drive shaft 28 is rotatably supported via a bearing 30 on a fixed cylinder 29 inserted into the rotary cylinder 22. A built-in motor 31 is mounted at the end of the drive shaft 28. Thus, the rotating cylinder 22 is structured to be rotated at a high speed by the built-in motor 31. A spacer ring 24 and a rubber ring 25 are loosely fitted around the outer periphery of the rotating cylinder 22 alternately. The outer periphery of the spacer ring 24 supports the inner diameter of the bobbin B. The rubber ring 25 is an elastic material having a substantially rectangular cross section, and the inner and outer diameters expand when subjected to an axial compressive force via the spacer ring 24. The rubber ring 25 is brought into close contact with the outer circumference of the rotary cylinder 22 and the inner circumference of the bobbin B by the expansion and deformation of the inner and outer diameters, and the bobbin B is concentrically held on the rotary cylinder 22 to reduce the rotational driving force. Let me know. The cap 23 is a member that is movably inserted into the tip of the rotating cylinder 22 and that compresses or releases the rubber ring 25 via the spacer ring 24. The piston 33 of the cap 23 and the cylinder 34 at the tip of the rotating cylinder 22 constitute an actuator. Normally, a spring 35 is interposed between the piston 33 and the cylinder 34, and the cap 23 compresses the rubber ring 25 via the spacer ring 24 (see the upper half of the bobbin holder 6 in FIG. 5). Then, when compressed air is introduced into the right chamber of the piston 33 from the air hole 36 that fits through the center of the drive shaft 28, the cylinder 34 moves to the left and releases the rubber ring 25 (the bobbin holder 6 in FIG. 5). See lower half).

The above-mentioned conventional bobbin holders 5 and 6 are cantilever-supported rotating bodies. The bobbin holders 5 and 6 further hold a package P of a considerable weight wound around a bobbin B, and a predetermined contact pressure is applied thereto via a touch roller 10. The structure is loaded. Therefore, the bobbin holders 5 and 6 have a very low frequency low-order natural frequency (for example, a winding speed of 900 m / min). On the other hand, in a spinning winder for winding a spinning (POY), high-speed winding at 3000 m / min or more is common. Therefore, as shown in FIG. 6, the frequency of the operation region at this winding speed is located exactly between the lower natural frequency and the higher natural frequency, thereby enabling high-speed operation of the spinning winder. I have to.

[0005]

However, since operation is performed between the low-order and high-order natural frequencies, for example, FIG.
As in the case of deceleration from the points A and B, the vehicle always passes the low-order natural frequency before stopping. Therefore, the vibration of the bobbin holders 5 and 6 increases before and after passing through the low-order natural frequency. Recently, GD ² of the bobbin holder with the trend of a large packaging and multi-ended in a take-up winder (multi packaging) is increasing, the longer it takes to stop the synergistic effect with the trend of high-speed Also, the vibration time when passing through the low-order natural frequency becomes longer. Further, since the weight is increasing, the whirling energy (vibration energy) is also increasing. As a result, the mechanical life is shortened due to the increase in mechanical vibration, the end face of the full package collapses and chrysanthemum winding is promoted, and the inner layer yarn is damaged by the transmission of vibration to the winding bobbin holder in the turret type take-up winder. The problem of has come to the surface.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a spinning winder which has a simple structure and can reduce mechanical vibration at the time of stop. It is something to offer.

[0007]

In order to achieve the above object, a take-up winder according to the present invention comprises a drive shaft rotatably supported in a cantilevered fixed cylinder, and a drive shaft rotatably supported by the fixed cylinder. In a spinning winder in which a rotating cylinder in an inserted state is fixed and a bobbin is held outside the rotating cylinder, the fixed cylinder has a multilayer structure in which a viscoelastic member is sandwiched.

[0008]

The viscoelastic member is made of copper, resin, or the like. Vibration energy is absorbed in accordance with the loss elastic modulus of the viscoelastic member, and exhibits a large vibration damping performance.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a bobbin holder of a spinning winder according to the present invention. In FIG. 1, the same reference numerals are given to the portions that operate in the same manner as in FIG. 5, and the description thereof will be omitted. The difference from FIG. 5 is the structure of the fixed cylinder and the turret in the bobbin holder.

In FIG. 1, the fixed cylinder 40 has a three-layer structure in which a resin layer 43 as a viscoelastic member is sandwiched between a small-diameter cylinder 41 and a large-diameter cylinder 42. Such a concentric multilayer structure can be formed by shrink fitting when the viscoelastic member is made of copper, or by press-fitting at a high temperature when the viscoelastic member is made of resin. The turret board 45 has a three-layer structure in which a copper plate 48 as a viscoelastic member is sandwiched between a front board 46 and a rear board 47. In order to efficiently obtain a vibration damping effect, at least the fixed cylinder 40 has a multilayer structure in which a viscoelastic member such as a resin is sandwiched, and the multilayer structure of the turret board 45 is arbitrary.

Next, the operation of the above-described spinning winder will be described below. The fixed cylinder 40 vibrates at a lower natural frequency,
Consider the case where repeated bending acts. When a tensile stress acts on the inner periphery of the large-diameter cylinder 42, a compressive stress acts on the outer periphery of the small-diameter cylinder 41. Conversely, when a compressive stress acts on the inner periphery of the large-diameter cylinder 42, a tensile stress acts on the outer periphery of the small-diameter cylinder 41. That is, a large strain variation occurs in the resin layer 43 located between the inner circumference of the large-diameter cylinder 42 and the outer circumference of the small-diameter cylinder. A viscoelastic member such as a resin absorbs the energy of the strain variation caused by the vibration and exhibits a large vibration damping effect.

That is, as shown in FIG. 2, at the natural frequency, the peak-to-peak amplitude of the peak is large in the case of the fixed cylinder having the single-layer structure, but is large in the case of the fixed cylinder having the multilayer structure. , A gentle peak-to-peak amplitude. For example, an amplitude of 500 μ in the past was changed to 40
μ, and the machine life is prolonged due to the reduction of mechanical vibration, the end surface of the full package is prevented from breaking or chrysanthemum winding. Can be prevented.

In the above-described embodiment, the so-called spindle drive type yarn winding machine in which the bobbin holders 5 and 6 for mounting the bobbin B are directly driven by the built-in motor 31 has been described. The present invention is also applied to a so-called friction drive type yarn winding machine in which the bobbin B is indirectly driven by driving the touch roller which is in contact with the roller B. In addition to the turret type in which two bobbin holders 5 and 6 are protruded from one yarn winding machine, a yarn in which one bobbin holder is fixedly protruded from one yarn winding machine. The present invention is also applied to a winder.

[0014]

The spinning winder according to the present invention has a fixed cylinder having a multilayer structure in which a viscoelastic member is interposed. Vibration energy is absorbed in accordance with the loss elastic modulus of the viscoelastic member, and large vibration damping is achieved. As it is designed to demonstrate performance, it has a simple structure of simply making the fixed cylinder a multilayer structure,
Mechanical vibration when passing through a low-order natural frequency can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bobbin holder of a spinning winder according to the present invention.

FIG. 2 is a graph showing a vibration damping characteristic.

FIG. 3 is a side view of the spinning winder.

FIG. 4 is a front view of the take-up winder.

FIG. 5 is a sectional view of a bobbin holder of a conventional spinning winder.

FIG. 6 is a graph showing a change in a natural frequency.

[Brief description of reference numerals]

 22 rotating cylinder 28 drive shaft 40 fixed cylinder 43 resin layer (viscoelastic member) B bobbin

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 54/00-54/88 F16F 15/00-15/32

Claims (1)

(57) [Claims] 1. A spinning machine in which a rotating cylinder inserted into the fixed cylinder is fixed to a tip of a driving shaft rotatably supported in a cantilevered fixed cylinder, and a bobbin is held outside the rotating cylinder. A spinning winder, wherein the fixed cylinder has a multilayer structure in which a viscoelastic member is sandwiched.