JP3234625U - Coil wire supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil wire rod supply device capable of smoothly, quickly and easily feeding the tip of a coil wire rod to a vertical pinch roll and a straightening machine.
SOLUTION: In a coil wire rod supply device, a tip portion of a coil wire rod supported in an arch shape with an outer bulge over the guide roll 9 and the main drum 7 at an upper position of a guide roll 9 and a main drum 7 in a main body 3. Is pressed from the outside in the direction of the central axis of the coil wire to bend and straighten it into a shape opposite to the bending habit direction, and the tip of the coil wire extends toward the entrance between the pinch rolls 11 and 12. The tip bending straightening mechanism 20 of the coil wire rod to be straightened is provided.
[Selection diagram] Fig. 1

Description

The present invention mainly relates to a coil wire rod supply device that supplies wire rods to a pressure forming machine that presses bolts, nuts or other parts.

Conventionally, for example, a squeeze molding machine in which a material having a predetermined size is sequentially supplied to a plurality of squeeze stations, and the material is squeezed stepwise from coarse to fine in a series of flows to finish a predetermined shape is practically used. However, in this type of pressure forming machine, a wire rod supply device is installed side by side, and the wire rod supplied from the wire rod supply device is cut to a predetermined size by a cutter provided in the pressure forming machine, and the cutting material is cut. It is customary to press-mold the material in stages from coarse to fine.

Then, as the coil wire rod supply device 40 that uses the coil wire rod bundle A, straightens it into a linear shape, and supplies it to the pressure forming machine, for example, as shown in FIGS. 8 and 9, it protrudes horizontally from the main body 41. A main drum (horizontal axis-shaped drive cylindrical roller) 42 that suspends and supports the coil wire bundle A inserted from the protruding end side thereof, and a guide roll provided at a position rearward in the wire feeding direction with respect to the main drum 42. 43, a pair of upper and lower pinch rolls 44, 45 provided at a position on the front side in the wire rod feeding direction with respect to the main drum 42 and sandwiching the tip end side of the coil wire rod a constituting the coil wire bundle A, and these pinch rolls 44, It is known that the wire rod a is rotationally driven to feed the wire rod a from the pinch rolls 44 and 45 to the pressure forming machine B side via a straightening machine (straightening the wire rod a linearly) 46. There is.

In use, first, the tip of the coil wire a of the coil wire bundle A is passed over the main drum 42 and then inserted between the upper and lower pair of pinch rolls 44 and 45 while driving the main drum 42. Next, the tip of the coil wire a is sent to the straightening machine 46 arranged forward from the outlets of the rolls 44 and 45 by driving the pinch rolls 44 and 45, and the coil wire a is passed through the straightening machine 46. After straightening it into a straight line, it is sent to the pressure forming machine B side. After that, the tip of the linear wire a is sandwiched by a wire feed roll (not shown) provided in the pressure forming machine B, and further, the pinch rolls 44 and 45 release the pinch of the wire a, and in the opened state. By intermittently rotating the wire rod feed roll, the linear wire rod a is pulled out from the main drum 42 and intermittently fed into the pressure forming station of the pressure forming machine B by a predetermined dimension. Further, the linear wire a that is intermittently sent to the crushing station is cut to a predetermined size by a cutter, and the cut material is dented in a stepwise stepwise manner from coarse to fine at a plurality of crushing stations to produce a product having a predetermined shape. Is molded into.

However, in the conventional coil wire supply device 40 described above, when the tip of the coil wire a in the coil wire bundle A that has passed over the main drum 42 is inserted between the pair of upper and lower pinch rolls 44 and 45, the coil is used. Since the tip of the wire a has a winding habit of the coil itself, the tip of the coil wire a that has passed over the main drum 42 hits the lower pinch roll 45 and is caught, and the tip is caught by a pair of upper and lower pinch rolls. There is a problem that the feeding work cannot be smoothly performed between 44 and 45, and the feeding work from the upper and lower pinch rolls 44 and 45 to the straightening machine 46 cannot be smoothly performed.
As a solution to this problem, the operator lifts the tip of the coil wire a each time and guides the coil wire a to the pinch rolls 44 and 45 or the straightening machine 46 while releasing the contact and catching on the lower pinch roll 45. The current situation is that it has been resolved. Therefore, the tip guidance work is very complicated and time-consuming, which imposes a heavy burden on the operator.

Therefore, in order to solve the above-mentioned problem, the present invention is devised so that the tip of the coil wire can be bent and corrected so as to face the upward side opposite to the winding habit of the coil material itself, and then fed between the upper and lower pinch rolls. As a result, the tip of the coil wire does not hit or get caught in the lower pinch roll, and the tip of the coil wire can be smoothly and quickly and easily fed to the upper and lower pinch rolls and the straightening machine. The challenge is to provide a coil wire supply device that can significantly reduce the work load.

In order to solve the above-mentioned problem, the device according to claim 1 of the present application is a main drum 7 that hangs and supports a coil wire bundle A that protrudes horizontally from the main body 3 in a cantilever shape and is inserted from the protruding end side. , The guide roll 9 provided at a position rearward in the wire rod feeding direction with respect to the main drum 7, and the upper and lower pinch rolls 11 and 12 that feed the wire rod a from the coil wire rod bundle A supported by the main drum 7 and supply the wire rod a to the molding machine. A coil wire supply device including a straightening machine 13 that straightens the wire a, and the guide roll 9 and the main drum 7 are located above the guide roll 9 and the main drum 7 in the main body 3. The tip of the coil wire a, which is supported in an arch shape that bulges outward, is pressed from the outside in the direction of the central axis of the coil wire a, and bent and straightened into a reverse shape opposite to the bending habit direction. It is characterized by comprising a tip bending straightening mechanism 20 for the coil wire a that straightens the tip of the coil wire a so as to extend toward the entrance between the pinch rolls 11 and 12.

According to the invention according to claim 2 of the present application, in the invention according to claim 1 of the present application, the tip bending straightening mechanism 20 of the coil wire rod is horizontally and rotatably supported at an upper position of the main drum 7 in the main body 3 and at one end. A drive shaft 21 for bending the tip whose portion protrudes outward from the main body 3 on the main drum side, and a tip having a straightening roller 22 fixed to one end of the drive shaft 21 so as to extend in the radial direction and for bending the tip at the tip. The straightening lever 23 for bending is connected via a drive lever 24 provided on the drive shaft 21, and the drive shaft 21 is rotationally driven by a predetermined angle by an expansion / contraction operation to move the straightening lever 23 into an upper standby position and a lower tip bending straightening position. It is provided with a hydraulic cylinder 25 that swings to and from, and a stopper member 26 that regulates the rotation of the drive shaft 21 toward the tip bending straightening position side and regulates the swing angle of the straightening lever 23 to a predetermined angle. It is a feature.

The invention according to claim 3 of the present application is the invention according to claim 2 of the present application, in which the stopper member 26 is provided with a stopper lever 30 projecting radially toward the intermediate portion in the length direction of the drive shaft 21 and a main body. A stopper adjusting bolt 35 which is supported on the third side via a support member 34 and stops the rotation of the drive shaft 21 toward the tip bending correction position side by contact with the stopper lever 30 is provided, and the stopper adjusting bolt 35 is the stopper adjusting bolt 35. It is characterized in that it is screwed and supported so as to be movable back and forth with respect to a nut 36 fixed to the support member 34 so that the rotation stop position due to contact between the bolt 35 and the stopper lever 30 can be changed and adjusted. ..

According to the coil wire rod supply device of the present invention, the tip bending straightening mechanism 20 of the coil wire rod a having the above-described configuration is specially provided, and the coil wire rod a is supported in an arch shape that bulges outward over the guide roll 9 and the main drum 7. The tip portion is pressed from the outside in the direction of the central axis of the coil wire a, bent and straightened into a shape opposite to the bending habit direction, and the tip of the coil wire a is between the pinch rolls 18 and 19. After straightening it so that it extends toward the entrance, it can be sent between the upper and lower pinch rolls, so that the tip of the coil wire does not hit or get caught in the lower pinch roll, and the tip of the coil wire a is It can be smoothly, quickly and easily fed into the upper and lower pinch rolls 11 and 12 and the straightening machine 13. As a result, the conventional troublesome and time-consuming tip guidance work can be eliminated, and the work load on the operator can be significantly reduced.

Further, according to the tip bending straightening mechanism 20 of the coil wire having the above-described configuration, the tip of the coil wire a is coiled from the outside by the straightening roller 22 of the straightening lever 23 attached to the drive shaft rotated by the hydraulic cylinder 25. It is pressed in the direction of the central axis of the wire a and bent and corrected in the opposite shape opposite to the bending habit direction, and the tip of the coil wire a is accurately extended toward the entrance between the pinch rolls 11 and 12. Can be corrected by bending the tip.

Further, in the stopper member 26, the stopper adjusting bolt 35 is fixed to the support member 34 so that the stopper position due to the contact between the bolt 35 and the stopper lever 30, that is, the load position by the straightening roller 22 can be changed and adjusted. If it is configured to be screwed and supported so that it can move forward and backward with respect to the nut, it can be changed to the optimum load position according to each type of coil wire bundle A, such as the coil outer diameter and coil wire diameter (thickness). This is good because you can make adjustments.

It is a partially omitted front view of the coil wire supply device which concerns on this invention. It is a partially omitted side view of the wire rod supply device. It is a partially omitted cross-sectional view of the tip bending correction mechanism of a coil wire rod. It is an enlarged sectional view of the main part. It is an enlarged sectional view of the stopper member part. It is explanatory drawing of the change of the suspended state when the coil wire diameter of the coil wire bundle A is different from large, medium, and small. It is a front view of the state in which the wire rod once pulled out in a straight line is rewound in a coil shape on the main drum. It is a partially omitted front view of the conventional example. It is a partially omitted side view of the conventional example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the coil wire rod supply device 1 according to this embodiment is from the base 2, the main body 3 erected at one end of the base 2, and the vertical intermediate portion of the front surface 3a of the main body 3. It has a horizontal frame 4 erected in a cantilever shape in the horizontal direction toward the other end side of the base 2, and a vertical frame 5 extending upward and connected to the end of the horizontal frame 4 on the opposite side of the main body 2. A main drum (horizontal axis-shaped cylindrical roller) 7 that suspends and supports the coil wire bundle A is cantilevered in the horizontal direction between the bracket 6 attached to the upper end of the vertical frame 5 and the front surface of the main body 3. It is configured to be erected in. The main drum 7 is driven by a main drum drive motor (not shown) installed in the upper part on the main body side.

A guide roll 9 for guiding the coil wire a on the tip side of the coil wire bundle A is provided at a position rearward in the wire feeding direction with respect to the main drum 7. The guide roll 9 is attached to the side wall 3b of the main body 3 so that its vertical height position can be adjusted according to the size of the coil outer diameter of the coil wire bundle A. Further, at a position on the front side in the wire rod feeding direction with respect to the main drum 7, a pair of upper and lower pinch rollers 11 and 12 and a plurality of straightening machines (a plurality of straightening rolls for straightening the warp of the coil wire rod are provided) 13. , 13 are arranged, and a drive motor (not shown) for rotationally driving the pinch rolls 11 and 12 is provided. Then, the coil wire a fed between the pinch rolls 11 and 12 by the rotary drive of the drive motor is straightened through the pinch rolls 11 and 12 and the straightening machines 13 and 13, and then the pressure forming machine B side. It is configured to feed out to. In FIG. 1, reference numeral 14 is a guide rod, reference numerals 15 and 15 are auxiliary drums of the coil wire bundle A, reference numeral 16 is a rod for preventing the coil wire bundle A from coming out from the main drum 7, and reference numeral 17 is drawn out from the straightening machine 13. This is a wire rod measuring and cutting device that cuts the wire rod a at a predetermined length position. In addition to providing a plurality of straightening machines 13, only a vertical straightening machine may be provided.

Then, in the present invention, the tip portion of the coil wire a that is supported in an arch shape that bulges outward over the guide roll 9 and the main drum 7 is provided above the guide roll 9 and the main drum 7 in the main body 3. , Press down from the outside in the direction of the central axis of the coil wire a and bend it into a reverse shape opposite to the bending habit direction, and the tip of the coil wire a faces the entrance between the upper and lower pinch rolls 11 and 12. It is provided with a tip bending straightening mechanism 20 for the coil wire a which is straightened so as to extend.

As shown in FIGS. 3 to 5, the tip bending straightening mechanism 20 of the coil wire rod is horizontally and rotatably supported above the main drum 7 in the main body 3, and the tip portion is laterally supported from the main body 3 to the outside of the main drum side. A drive shaft 21 for bending the tip that protrudes in the direction, and a straightening lever 23 for bending the tip that is fixed to the tip of the drive shaft 21 so as to extend outward in the radial direction and has a straightening roll 22 for bending the tip at the tip. And the upper standby position shown by the virtual line in FIG. 1 by rotating the drive shaft 21 by a predetermined angle by interlocking with the drive lever 24 provided on the outer periphery of the base end portion of the drive shaft 21 and expanding and contracting. The swing angle of the straightening lever 23 is obtained by restricting the rotation of the hydraulic cylinder 25 that swings to any of the lower tip bending straightening positions shown by the solid line in FIG. 1 and the drive shaft 21 toward the tip bending straightening position side. A stopper member 26 that regulates a predetermined angle is provided.

Specifically, as shown in FIGS. 3 and 4, the base side of the drive shaft 21 is rotatably supported inside the main body 3 via bearings 27 and 28, and the tip portion is rotatably supported from the main body 3 to the outside of the main drum side. It protrudes toward you. A drive lever 24 is provided at the base end portion of the drive shaft 21 in the main body 3, and a stopper lever 30 is provided at the intermediate portion. Further, a hydraulic cylinder 25 is arranged at a lower position of the drive lever 24 in the main body 3. The tip of the cylinder rod in the hydraulic cylinder 25 is connected to the drive lever 24 of the drive shaft 21, and the drive shaft 21 is rotated via the drive lever 24 by the expansion and contraction operation of the hydraulic cylinder 25. A hydraulic unit 31 for operating and controlling the cylinder 25 is connected to the hydraulic cylinder 25 via connecting pipes 32 and 33. The hydraulic unit 31 side is provided with an operation unit (not shown) having an operation button for starting and stopping the drive of the hydraulic cylinder 25, and operates when the hydraulic cylinder 25 is driven in the direction of the lower tip bending correction position. When the oil pressure rises above the set value, a control unit (not shown) that switches the solenoid valve and operates to form a self-holding circuit is provided.

Further, as shown in FIG. 5, the stopper member 26 includes a stopper lever 30 attached to the drive shaft 21 and a stopper adjusting bolt 35 attached to the main body 3 via the support member 34. When the drive shaft 21 rotates clockwise in FIG. 4, the stopper adjusting bolt 35 stops the rotation of the drive shaft 21 by abutting the stopper lever 30 attached to the drive shaft 21 to the stopper adjusting bolt 35. That is, the stopper adjusting bolt 35 sets the rotation stop position (load position) of the straightening lever 23 in the downward tip bending straightening direction. Further, the stopper adjusting bolt 35 is screwed and supported by a nut 36 fixed to the support member 34, and by rotating the bolt 35 in an arbitrary direction with respect to the nut 36, the stopper adjusting bolt 35 moves forward and backward with respect to the support member 34. It is installed as possible. By adjusting the advancing / retreating movement of the stopper adjusting bolt 35, the contact position between the stopper lever 30 and the stopper adjusting bolt 35, that is, the rotation stop position (load position) below the correction lever 24 can be changed and adjusted in the range of, for example, 40 ° to 60 °. It has become like. This load position change adjustment is not limited to mere fine adjustment, but is optimized for each type of coil wire bundle A, such as the coil outer diameter and coil wire diameter (thickness), as shown in FIG. 6, for example. The position will be changed and adjusted. Further, although the mechanism itself of the stopper member 26 is generally housed in the main body 3, the stopper member 26 is provided so that the adjustment work by the rotation operation of the stopper adjusting bolt 35 can be operated from the outside.

Next, the operation of the coil wire rod supply device 1 provided with the tip bending correction mechanism 20 of the coil wire rod a will be described as described above.

At the time of use, first, after setting the coil wire bundle A on the main drum 7, the main drum 7 is rotated by the drive motor 8 and fed until the tip of the coil wire a passes over the main drum 7, and the upper and lower pinch rolls 11, The rotation of the main drum 7 is stopped 12 before. Next, the drive start operation button provided on the operation unit is pushed to drive the hydraulic cylinder 25, the cylinder 26 is extended, and the drive shaft 21 is rotated via the drive lever 25. When the drive shaft 21 rotates, the straightening lever 23 and the stopper lever 30 also rotate integrally. As a result, as shown by the solid line in FIG. 1, the straightening roller 22 in the straightening lever 23 supports the tip portion of the coil wire a, which is supported in an arch shape that bulges outward due to a winding habit between the guide roll 9 and the main drum 7. , It is pressed from the outside in the direction of the central axis of the coil wire a, and as shown in FIG. 1, it is bent and straightened into a shape opposite to the winding habit direction. As a result, the tip of the coil wire a is straightened so as to extend toward the entrance between the upper and lower pinch rolls 11 and 12.
At that time, when the drive shaft 21 rotates until shown by the solid line in FIG. 1 set by the stopper member 26, the stopper lever 30 comes into contact with the stopper adjusting bolt 35, the rotation of the drive shaft 21 is stopped, and at the same time, the hydraulic unit The oil pressure in 29 rises, the solenoid valve is switched to become a self-holding circuit, and the state in which the tip is bent and corrected in the reverse shape is maintained.

After that, the main drum 7 is driven and rotated, and the tip of the coil wire a whose tip is bent and corrected in the reverse shape described above is sent to the entrances of the pinch rolls 11 and 12. As a result, the tip of the coil wire a, which has been bent and straightened in an inverted shape, is smoothly fed to the upper and lower pinch rolls 11 and 12 without hitting or being caught by the lower pinch roll 21. .. Then, the tip of the coil wire a that has been fed to the upper and lower pinch rolls 11 and 12 is continuously smoothly fed from the upper and lower pinch rolls 21 to the straightening machine 13 by the drive of the pinch rolls 11 and 12.

Here, after the tip of the coil wire a is sent to the upper and lower pinch rolls 11 and 12 and the straightening machine 13, the drive lever is shortened by pressing the drive stop operation button provided on the operation unit to shorten the operation of the hydraulic cylinder 25. The drive shaft 21 is rotated in the reverse direction via the 24, and the correction lever 23 is swung from the lower rotation stop position (load position) shown by the solid line in FIG. 1 to the upper standby position shown by the virtual line in FIG. 1 to stand by. ..

Then, the tip of the coil wire a fed into the straightening machine 13 is straightened from the outlet of the straightening machine 13 and then sent out to the pressure forming machine side, and the tip of the linear wire a is pressed. It is sandwiched by a wire rod feed roller (not shown) provided on the molding machine side. After that, the rotation of the main drum 7 is stopped, the pinch rolls 11 and 12 are released, and the wire rod feed roller is intermittently rotated in the open state to pull out the wire rod a from the main drum 7. It is intermittently fed to the squeeze station of the squeeze molding machine by predetermined dimensions. Further, the wire rod a intermittently supplied to the squeezing station is cut to a predetermined size by a cutter, and the cutting material is squeezed stepwise from rough to fine at a plurality of squeezing stations to form a product having a predetermined shape. Will be done.

As described above, according to the coil wire supply device of the present invention, the tip bending straightening mechanism 20 of the coil wire a having the above-described configuration is specially provided, and is supported in an arch shape of an outward bulge over the guide roll 9 and the main drum 7. The tip of the coil wire a is pressed from the outside in the direction of the central axis of the coil wire a to bend and straighten it into a shape opposite to the bending habit direction, and the tip of the coil wire a is pinch-rolled. After straightening it so that it extends toward the entrance between 11 and 12, it can be sent between the upper and lower pinch rolls, so that the tip of the coil wire does not hit or get caught in the lower pinch roll, and the coil The wire rod a can be smoothly, quickly and easily fed into the upper and lower pinch rolls 11 and 12 and the straightening roll. As a result, the conventional troublesome and time-consuming tip guidance work can be eliminated, and the work load on the operator can be significantly reduced.

Further, according to the tip bending straightening mechanism 20 of the coil wire of the above-described embodiment, the tip of the coil wire a is outwardly removed by the straightening roller 22 of the straightening lever 23 attached to the drive shaft 21 rotated by the hydraulic cylinder 25. Is pressed in the direction of the central axis of the coil wire a to bend and correct it in the opposite shape opposite to the bending habit direction, and the tip of the coil wire a extends toward the entrance between the pinch rolls 11 and 12. The tip can be bent and corrected accurately.

Further, in the stopper member 26 described above, the stopper adjusting bolt 35 is supported so that the stopper position due to the contact between the stopper adjusting bolt 35 and the stopper lever 30, that is, the load position by the straightening roller 22 can be changed and adjusted. Since it is screwed to the nut fixed to the member 34 so that it can move forward and backward, the optimum load can be adjusted for each type of coil wire bundle A, such as the coil outer diameter and coil wire diameter (thickness). The position can be changed and adjusted.

On the other hand, when the molding work by the molding machine is completed while all the coil wire a is used up, conventionally, all the linear wires pulled out from the main drum to the molding machine side and straightened are pulled back and discarded. However, in the coil wire rod supply device of the present invention, the tip bending straightening mechanism 20 of the coil wire rod a described above can be used to rewind the coil wire rod 7 onto the main drum 7 in a coil shape. That is, as shown in FIG. 7, the linear tip portion of the coil wire a drawn from the main drum 7 to the molding machine side is rewound to the main drum 7 side by the drive of the main drum 7 and at the same time, the tip bending straightening roller. According to 22, the coil wire bundle A can be rewound on the main drum 7 while being bent and corrected so as to match the original coil shape. As a result, it is not necessary to dispose of the linear wire rod portion, and the coil wire bundle A is taken out from the main drum 7 and stored in the storage shelf, and the stored coil wire bundle A can be effectively reused. can do.

1 Coil wire supply device 3 Main body 7 Main drum 9 Guide rolls 11, 12 Vertical pinch roll 13 Straightening machine 21 Tip bending drive shaft 22 Tip bending straightening roller 23 Tip bending straightening lever 24 Drive lever 25 Hydraulic cylinder 26 Stopper member 30 Stopper lever 34 Support member 35 Stopper adjustment bolt 36 Nut A Coil wire bundle a Coil wire

Claims (3)

A main drum 7 that hangs and supports a coil wire bundle A that protrudes horizontally from the main body 3 in a cantilever shape and is inserted from the protruding end side, and a guide provided at a position rearward in the wire rod feeding direction with respect to the main drum 7. A coil including a roll 9, upper and lower pinch rolls 11 and 12 that feed the wire rod a from a coil wire rod bundle A supported by the main drum 7 and supply the wire rod a to a molding machine, and a straightening machine 13 that straightens the wire rod a linearly. In the wire rod supply device, the tip portion of the coil wire rod a that is supported in an arch shape that bulges outward over the guide roll 9 and the main drum 7 is provided above the guide roll 9 and the main drum 7 in the main body 3. It is pressed from the outside in the direction of the central axis of the coil wire a to bend and correct it into a shape opposite to the bending habit direction, and the tip of the coil wire a extends toward the entrance between the pinch rolls 11 and 12. A coil wire rod supply device comprising a tip bending straightening mechanism 20 for the coil wire rod a to be straightened. The tip bending straightening mechanism 20 of the coil wire is horizontally and rotatably supported above the main drum 7 in the main body 3, and one end thereof and the tip bending drive shaft 21 projecting outward from the main drum side. , A tip bending straightening lever 23 fixed to one end of the drive shaft 21 so as to extend in the radial direction and having a tip bending straightening roller 22 at the tip, and a drive lever 24 provided on the drive shaft 21 are connected and driven. The hydraulic cylinder 25 that rotates the shaft 21 by a predetermined angle by expanding and contracting to swing the straightening lever 23 between the upper standby position and the lower tip bending straightening position, and the rotation of the drive shaft 21 toward the tip bending straightening position side. The coil wire rod supply device according to claim 1, further comprising a stopper member 26 that regulates and regulates the swing angle of the straightening lever 23 to a predetermined angle. The stopper member 26 is supported by the stopper lever 30 protruding in the radial direction from the intermediate portion in the length direction of the drive shaft 21 via the support member 34 on the main body 3 side, and is brought into contact with the stopper lever 30. A stopper adjusting bolt 35 for stopping the rotation of the drive shaft 21 toward the tip bending correction position side is provided, and the rotation stop position of the stopper adjusting bolt 35 can be changed and adjusted by contact between the bolt 35 and the stopper lever 30. The coil wire rod supply device according to claim 2, wherein the coil wire rod supply device is screwed and supported so as to be movable back and forth with respect to a nut 36 fixed to the support member 34.

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