JPH0576612U - Turntable device for feeding wire - Google Patents

Abstract

(57) [Summary] [Purpose] The rotating force of the turntable is automatically adjusted as the number of wire rod coils decreases, and the wire rod is constantly fed with a constant tension. [Structure] Spindle 4 that rotates integrally with turntable 1
In addition, the torque control device 5 connected to the torque control shaft 6 is transmitted so that a constant torque is always applied even if there is a change in load, and the torque of the turntable is precisely controlled according to the type of load.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a turntable used for feeding a wire rod.

[0002]

[Prior Art]

 Conventionally, when heat-treating a wire rod, the wire rod is wound in a coil shape and placed on a freely rotating turntable in a state of being fitted to a carrier, and the tension is used to rewind the wire rod from a turntable device to a heating furnace or a heating furnace. It is taken up by the winder through the straightening machine. In this case, the weight of the turntable is obtained by adding the weight of the wire rod.In the initial stage, since the weight is heavy, a large torque is required and the rotation is poor. Since the rotation becomes smooth, the tension acting on the wire changes. Therefore, adjustment is required to keep the tension constant. Conventionally, as shown in FIG. 3, the adjustment is performed by providing a main shaft 16 supporting the turntable 15 with a brake device 17 such as a hand brake or a disc brake. When the coil amount decreases and the weight becomes lighter, the main shaft 16 is adjusted by tightening the brake device 17. In FIG. 3, reference numeral 18 denotes a coil carrier that fits into a coil-shaped wire and holds the coil.

[0003]

[Problems to be solved by the device]

 As described above, the rotation of the turntable fluctuates depending on the applied load, so it is necessary to weaken the braking force when the weight is heavy and to increase the braking force when the weight is small. However, since the wire rod decreases every moment, it is almost impossible to monitor it one by one and adjust the braking force according to it, and in the past, the brake was manually operated at a predetermined interval with the feeling of an expert. I am just adjusting roughly. Therefore, it is difficult to always keep the tension acting on the wire constant, and the tension varies. If the brake force of the turntable is strong, the wire rod is pulled strongly and a phenomenon called "fire elongation" occurs, and the dimension of the wire becomes thin, resulting in uneven quality. On the other hand, if the braking force is weak, the turntable spins idle, the coils disperse, and the traveling speed of the wire becomes unstable, causing variations in the heating time. The present invention is intended to solve the above-mentioned problems of the conventional wire rod feeding turntable. Even if the decrease in the number of wire rod coils on the turntable is reduced, the braking force always works at the set torque, and the constant tension is maintained. An object of the present invention is to provide a turntable device for feeding a wire, which can feed the wire with a wire.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a turntable device for feeding a wire according to the present invention is used for feeding a wire rod in which a coiled wire rod is placed on a turntable and tension is applied to the wire rod to rotate the turntable to rewind the wire rod. In the turntable device, the problem is solved by adopting a technical means characterized in that the torque control shaft of the torque control device is transmitted to the main shaft that rotates integrally with the turntable via the gear device.

[0005]

[Action]

 According to the rotation of the main shaft, the torque adjustment shaft is interlocked via the gear device and rotates at a constant speed ratio, but the torque adjustment device applies a set torque to the torque adjustment shaft. Therefore, the braking torque regulates the rotation of the main shaft, and even if the coil amount decreases, the turntable always rotates with a constant rotation torque, and the tension acting on the wire can be kept substantially constant. The torque adjustment shaft can finely adjust the braking torque according to the set rotation angle of the torque adjustment permanent magnet disc, and accordingly the tension acting on the wire can be finely adjusted.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a turntable 1 is fixedly supported on the top of a main shaft 4 rotatably supported by a bearing 3 on a base frame 2. Reference numeral 5 is a torque control device for controlling the torque of the main shaft 4 so as to keep it constant. The torque control device 6 is fixedly supported on the base frame by an appropriate supporting means, and the torque control shaft 6 is attached to the main shaft 4 of the turntable by the gear device 7. The torque control shaft 6 is also rotated by the rotation of the main shaft 4. The torque control device 5 can set a desired torque, and the braking torque set regardless of the rotation speed of the output shaft is always applied to the output shaft. Perman torque (trade name) or other commercially available permanent magnet type torque. Adopt a control device. FIG. 2 is a principle diagram of the permanent magnet type torque control device. The hysteresis disk 8 is fixed to the torque control shaft 6, the fixed permanent magnet disk 9 is fixed to the frame, and the rotation angle is adjustable on the frame. The permanent magnet disc 10 for torque adjustment is provided, and the braking torque can be adjusted by adjusting the rotation angle of the permanent magnet disc 10 for torque adjustment with respect to the fixed permanent magnet disc 9. ..

The coil-shaped wire rod held by the carrier is placed on the turntable of the turntable device configured as described above, and the coiled wire is passed from the turntable device through a heating furnace or a rectifying machine and wound. By winding with a machine, tension acts on the wire rod, the turntable rotates, and the coiled wire rod is gradually unwound. At that time, according to the rotation of the main shaft, the torque adjusting shaft is interlocked via the gear device to rotate at a constant speed ratio. On the other hand, the torque adjustment shaft generates a braking torque preset by the torque control device, so the braking torque is transmitted to the main shaft via the gear device and regulates the rotation of the main shaft, reducing the coil amount. Even so, the turntable always rotates with a constant rotation torque, and the tension acting on the wire can be kept substantially constant. Although only one torque control device is provided in the above embodiment, it is possible to provide a plurality of torque control devices by transmitting a plurality of torque control shafts to the main shaft. Needless to say, the turntable for feeding wire according to the present invention can be applied not only to the heat treatment line of the wire but also to a wire drawing or plating line.

[0008]

[Effect of the device]

 The present invention is configured as described above and has the following special effects. Even if the amount of coil decreases, the turntable rotates with a constant rotational torque, and the tension applied to the wire can be kept almost constant, resulting in the "stretching" phenomenon and variations in heating time as in the past. Can be prevented. Further, the torque control device can finely adjust the braking torque, and accordingly, the tension acting on the wire can be precisely adjusted. In addition, since permanent magnets are used, there is no need for a power source or air as in the past, running costs are low, and maintenance is easy. Furthermore, it is possible to use either the left or right side without being affected by the winding direction of the wire.

[Brief description of drawings]

FIG. 1 is a front view of a wire rod feeding turntable device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view of a torque control device.

FIG. 3 is a front view of a conventional wire rod feeding turntable device.

[Explanation of symbols]

1 Turntable 4 Spindle 5 Torque control device 6 Torque control shaft 7 Gear device 8 Hysteresis disc 9 Fixed permanent magnet disc 10 Permanent magnet disc for torque adjustment

Claims (1)

[Scope of utility model registration request] 1. A wire rod feed-out turntable device in which a wire rod wound in a coil shape is placed on a turntable and the wire rod is unwound by the tension applied to the wire rod. A turntable device for feeding a wire, characterized in that a torque control shaft of a torque control device is transmitted to a main shaft rotating around a gear via a gear device.