JPH0335447Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drum for drawing a metal wire such as a welding wire, and particularly relates to an improvement of a two-stage drum.

(Prior Art) When drawing and winding a metal wire, it is known to arrange a two-stage drum between a wire drawing die and a winding machine. For example, as described in Japanese Utility Model Application Publication No. 56-12512, the two-stage drum includes a lower drive drum that winds the wire from the wire drawing die with a wheel having a turn roller in the middle, and a lower drive drum that winds the wire from the wire drawing die. There is one that consists of an upper drum that can be freely driven in the opposite direction.

However, in the conventional two-stage drum described above, the lower drum can either rotate or not, but the upper drum only rotates (in the opposite direction to the lower drum) by the driving force of the winding machine downstream. It is impossible to rewind the wire from the wake. This operation of rewinding the wire to the upper drum is
For example, when winding in alignment with a winding machine, tension,
This is necessary when the wire becomes irregularly wound due to variations in wire diameter, etc. Therefore, conventionally, when irregular winding occurs, the line must be stopped and the cause of the irregular winding removed, or the line must be unwound onto another spool to restore the lined winding, which is very cumbersome to operate. This was an obstacle to improving productivity.

(Object of the invention) The object of the invention is to solve the problems of the conventional two-stage drum as described above, and to provide a wire drawing machine drum that can rewind the wire from the wake when necessary.

(Structure and operation of the invention) In order to achieve this purpose, the invention adopts the following structure. That is, in a two-stage drum of a wire drawing machine, which is equipped with a lower drive drum that winds the wire supplied from the front stream downward across wheels having turn rollers, and an upper drum that sends the wire upward to the back stream. , a rotary shaft of the lower drum is extended upward, a hollow shaft is rotatably attached concentrically to the shaft, the wheel is fixed to the hollow shaft, and contact is made between the hollow shaft and the rotary shaft.・In addition to interposing a non-contact friction mechanism, a friction mechanism that makes frictional contact only in the rewinding direction of the drum is interposed between the hollow shaft and the inner cylinder of the upper drum, and further rewinding to the upper drum. It has a configuration in which driving machines that transmit driving force are connected.

With this structure of the present invention, even if irregular winding occurs during wire winding, the drum can be rotated in the opposite direction and the wire can be unwound from the wake, so the irregular winding can be immediately eliminated. After the winding is resolved, it is possible to return to normal operation by returning to aligned winding again.

(Example) The present invention will be described based on an example shown in the drawings.

As shown in FIG. 1, a lower drum 1 is fixed by a key to a rotating shaft 4 that is rotated by a drive device (not shown). (simply referred to as the front stream) is wound up. The rotating shaft 4 of the lower drum 1 extends upward and rotatably holds a hollow shaft 9 on its outer periphery via a bearing. A wheel 3 having a turn roller 5 is fixed to the lower part of the hollow shaft 9, and a disk plate 13 is provided on the upper surface of the upper part of the hollow shaft 9.
3 is a friction disk 1 keyed to the top of the rotating shaft 4
The disk 12 can move forward and backward in the axial direction and be pressed by a cylinder 6 provided above, and can make contact or non-contact between the hollow shaft 9 and the rotary shaft 4. (first friction mechanism).

On the other hand, an upper drum 2 is rotatably provided on the outer periphery of the hollow shaft 9 via a bearing,
The wire W sent to the upper drum 2 via the lower drum 1 and turn roller 5 is taken out from the drum 2 to the next step (for example, winding up by a winding machine, hereinafter simply referred to as downstream). Further, a pulley 14 fixed to the upper part of the upper drum 2 is connected to a pulley 15 of a motor 8 via a belt 16, so that the upper drum 2 can be rotated as appropriate.
In addition, 7 is an electromagnetic clutch provided between the pulley 15 and the motor 8, and is configured to arbitrarily turn on and off between the two.

Furthermore, a second friction mechanism as shown in FIG. 2 is interposed between the hollow shaft 9 and the upper drum 2. That is, the rotating shaft 4, the hollow shaft 9, and the upper drum inner cylinder 2A are arranged concentrically as shown in the figure, but one end is connected to the hollow shaft 9 between the hollow shaft 9 and the inner cylinder 2A. A friction member 18 is provided at the other end of the pivoted arm 17, and a plurality of friction mechanisms each consisting of a spring 19 that pulls the arm 17 in one direction are provided. Therefore, in the illustrated example, when the inner cylinder 2A rotates counterclockwise (or when the hollow shaft 9 rotates clockwise, as indicated by the solid arrow), no friction is transmitted; In the clockwise direction (counterclockwise in the case of the hollow shaft 9, indicated by the chain arrow), a large frictional contact is obtained, and a force is generated that rotates the hollow shaft 9 in the same direction.

FIG. 3 shows an example in which the above-mentioned two-stage drum is installed between a finishing wire drawing machine and a winding drum. In the figure, 20 is the wire drawing machine body, 21 is the winding spool 22
23 is a take-up capstan installed before winding, and 24 is a dancer roller. The wire W that has been finished and drawn to a predetermined wire diameter through the wire drawing machine main body 20 is stored in the lower drum 1 for about 10 to 20 turns, and the wire W that is transferred to the upper drum 2 via the turn roller 5 is also stored. The line is stored for 10 to 20 turns.

Next, the operation of the illustrated example will be explained.

First, during normal operation, that is, when the amount of wire entering the lower drum 1 and the upper drum 2 is equal to the amount of wire being pulled out, the upper and lower drums rotate in opposite directions at the same rotation speed, but in this case, the wheel of the turn roller 5 3 is almost stationary (it is not completely stationary but swings slightly from side to side due to fluctuations in wire tension). In addition, if the wire W is not taken out to the downstream, the upper drum 2 does not rotate and the lower drum 1 continues to rotate, but at this time the wheel 3 moves 1/1/2 of the lower drum 1 in the same direction as the lower drum 1. The drum rotates at a rotational speed of 2, and half of the wire W is wound around each drum.
On the other hand, if there is no winding of the wire W from the front stream, the lower drum 1 stops rotating, the upper drum 2 continues to rotate, and the wheel 3
The upper drum 2 rotates in the same direction at 1/2 the rotational speed of the upper drum 2, and half of the wire W is taken out from each drum.

In any of the above cases, the first friction mechanism works and the upper drum 2 rotates because it follows the drive of the winding machine downstream, so naturally in this case the electromagnetic clutch 7 is in the disengaged state. It's summery. Note that both of the above cases are the effects of a conventionally known two-stage drum.

Therefore, if for some reason, for example, a disturbance occurs in the aligned winding during winding by a winding machine, the wire W must be rewound onto the upper drum 2. In such a case, in the two-stage drum of the present invention, the lower drum 1 is stopped and the electromagnetic clutch 7 is turned on.
The driving force of the motor 8 is transmitted to the upper drum 2, the upper drum 2 is rotated in the reverse direction, and the wire W is rewound. At this time, the first friction mechanism is deactivated, the second friction mechanism is activated, the rotational driving force is transmitted from the drum inner cylinder 2A to the hollow shaft 9, and the wheel 3 is rotated in the rotation direction of the upper drum 2. Rotates at 1/2 rotation speed of
Each half of the wire W is wound around the drum.

(Effects of the invention) As explained above, according to the invention, the upper drum of the two-stage drum can be rotated in the opposite direction to the normal operating state to unwind the wire as appropriate, so any situation can be coped with. Its usefulness is great, and it greatly improves the productivity of the wire drawing machine.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the wire drawing machine drum of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig.
The figure is a side view showing an example of incorporating the drum of the present invention into a wire drawing process. 1...Lower drum, 2...Upper drum, 3...
Wheel, 4...Rotating shaft, 5...Turn roller,
6... Cylinder, 7... Electromagnetic clutch, 8... Rewind drive motor, 9... Hollow shaft, 12... Friction disk, 18... Friction member.

Claims (1)

[Scope of utility model registration request] A two-stage wire drawing machine comprising a drive lower drum 1 that winds the wire supplied from the front stream downward across wheels 3 having turn rollers 5, and an upper drum 2 that sends the wire upward to the back stream. In the drum, the rotating shaft 4 of the lower drum 1 is extended upward, a hollow shaft 9 is rotatably attached to the shaft 4 in a concentric manner, and the wheel 3 is fixed to the hollow shaft 9. A first friction mechanism that can freely contact and non-contact is interposed between the rotary shaft 4 and the hollow shaft 9.
A second friction mechanism is interposed between the inner cylinder 2A of the upper drum 2 and the inner cylinder 2A of the upper drum 2 to make frictional contact only in the rewinding direction of the drum 2, and a drive device further transmitting the rewinding driving force to the upper drum 2. A wire drawing machine drum characterized by 8 connected together.