JPH0130460Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention applies appropriate rotational torque to the winding bobbin that feeds the wire onto the winding surface of the winding bobbin, thereby applying appropriate tension to the running wire. This invention relates to a wire feeding device that is capable of performing stable winding operations by applying a load to the wire.

BACKGROUND TECHNOLOGY A configuration has been proposed in which the additional torque of the payout bobbin of this type of wire payout device is generated by a rotating magnetic field, but the rotational torque value transmitted to the payout bobbin is small, and therefore the amount of torque applied to the payout bobbin is small. It is good if it can be used within a small range of rotational torque to be applied, but if a larger rotational torque is required, there are problems such as excessive tension being applied to the running wire, which may cause wire breakage. It was hot.

Problems to be solved by the invention: By creating a structure in which the additional torque of the feeding bobbin is generated by the viscosity of the oil, the range of the additional torque value can be expanded, and thereby the change in the winding speed of the running wire can be It is an object of the present invention to provide a wire feeding device that can reliably apply the required additional torque, load the running wire with an appropriate tension, and ensure stable winding operation.

Summary of the invention A rotating shaft that interlocks with the feeding bobbin shaft is provided, an oil box with a hollow space inside is attached to the rotating shaft so as to be rotatable in a water-tight manner, and the oil box is connected to a drive source, A driven ring that divides the chamber into two in the axial direction and whose outer rim portion fits loosely against the circumferential surface of the chamber is fixed to the rotating shaft, and the outer circumferential surface of the rim portion and the oil container facing it are fixed to the rotating shaft. Multiple axial grooves are arranged on the inner circumferential surface,
This wire feeding device is characterized in that a viscous liquid such as oil having a required viscosity is sealed in the cavity.

Embodiment Hereinafter, the structure of an embodiment of the present invention will be described with reference to the drawings.

A bearing case 2 extending inside the machine frame 1 is fixed, and a rotating shaft 3 coaxially integrated with the bobbin shaft of a payout bobbin (not shown) installed outside the machine frame 1 is connected to the bearing case 2. An oil box 5 with a cavity 4 formed inside is attached to the part of the rotating shaft 3 that protrudes from the bearing case 2 in a water-tight manner and is rotatably attached to the outer periphery of the oil box 5. is provided with a pulley groove 6. A driven ring 9 which divides the cavity 4 into two in the axial direction and whose outer rim portion 7 loosely fits into the inner circumferential surface 8 of the cavity periphery oil container 5 is attached to the rotating shaft 3 in the cavity 4. A plurality of axial grooves 11, 12, etc. are provided at equal intervals on the outer circumferential surface 10 of the rim portion 7 and the inner circumferential surface 8 of the oil container 5 facing the rim portion 7, respectively. A viscous liquid a such as oil having a required viscosity is sealed in the container.

Function Next, the function will be explained based on the configuration of the above embodiment.

First, a belt (not shown) that is passed around the pulley groove 6 of the oil can 5 is driven by an electric motor to rotate the oil can 5. The oil box 5
Due to the rotation of the inner circumferential surface 8 and the outer circumferential surface 1 of the driven ring 9,
Due to the viscosity of the oil intervening in the gap between the grooves 11 and 12 or the circumferential surface of the other, the viscosity of the oil intervening in the gap with A force is generated in the circumferential direction of the driven ring 9 due to viscosity, and a torque is generated that attempts to rotate the driven ring 9 in the same direction as the rotational direction of the oil container 5. Additional torque is applied to the payout bobbin by transmitting rotational torque to the coaxial bobbin shaft, whereby the tension of the payout wire is relaxed and the wire runs with an appropriate tension applied thereto.

Effects of the invention As is clear from the above explanation, the present invention is designed to generate the additional torque of the feeding bobbin using the viscosity of a viscous liquid such as oil. The range of additional torque values expands due to the interaction of liquid volume, etc., and as a result, it is possible to apply the necessary additional torque to the running wire in response to fluctuations in running line tension due to changes in the winding speed, and to improve the running wire. Appropriate tension is applied,
This contributes to stable winding operations without sagging or unexpected wire breaks.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing a main part of the structure of an embodiment of the present invention, and FIG. 2 is an end view taken along line A--A in FIG. 1. 3...Rotation diagram, 4...Vacant room, 5...Aburakane, 7...
...Rim portion, 8...Inner peripheral surface of oil can, 9...Driver ring, 1
0...Rim part outer peripheral surface, 11, 12...Groove, a...
Viscous liquids such as oil.

Claims (1)

[Scope of utility model registration request] A rotary shaft 3 that interlocks with the feeding bobbin shaft is provided, an oil container 5 having a cavity 4 formed therein is rotatably attached to the rotary shaft 3 in a watertight manner, and the oil container 5 is associated with a drive source. A driven ring 9 which divides the cavity 4 into two in the axial direction and whose outer rim part 7 loosely fits into the cavity periphery is fixed to the rotating shaft 3, and the outer periphery of the rim part 7 is fixed to the rotary shaft 3. A plurality of axial grooves 11 and 12 are provided in the surface 10 and the inner circumferential surface 8 of the oil box 5 facing the surface 10, respectively, and a viscous liquid a such as oil having a required viscosity is sealed in the cavity 4. A wire feeding device characterized by comprising: