JP5603754B2 - Drum lifter, drum attaching / detaching structure and wire feeder, drum attaching method and drum removing method - Google Patents

Description

The present invention relates to a drum lifter capable of supporting and moving a drum around which a wire is wound to attach to or remove from a drum-using device such as a wire feeder, and further to the drum lifter. The present invention relates to a drum attachment / detachment structure that functions as a unit, and a wire feeder equipped with a drum lifter and a drum attachment / detachment structure.
Furthermore, the present invention relates to a method for attaching and removing such a drum to a wire feeder or the like.

In a stranded wire manufacturing system for manufacturing a stranded wire such as an electric wire in which a plurality of strands are twisted together, there are a stranded wire machine for twisting the strands, and a wire feeder that sends and supplies the strands to the stranded wire machine. Is provided. This wire feeder rotatably supports a drum (bobbin) around which a wire is wound.
At the electric wire manufacturing plant, the drums that have lost their strands are removed from the wire feeder as the wires are consumed due to the production of the wires, and the drum with the new wire wound is attached to the wire feeder. There is a need. However, there are various types of electric wires for various purposes, and some drums wound with thick and long metal wires have a weight of 1000 kg or more, and are difficult to handle.

Conventionally, a technique for automating such drum replacement work has been known. For example, Japanese Patent Laid-Open No. 7-187508 (Patent Document 1) describes an invention of a bobbin drum delivery stand provided with a lift and a support roll. ing.
However, this bobbin drum delivery stand does not have a support shaft that is joined to and supported by the drum, and it is difficult to apply to a device such as a wire feeder equipped with a support shaft that rotatably supports the drum.

JP 7-187508 A

On the other hand, the following drum mounting technique is adopted in a conventional wire feeder that supports a drum by sandwiching and supporting it at the ends of support shafts provided on both sides of the drum.
In the first technique, a tapered drum joint is formed at a portion of the support shaft that joins the drum, and the end of the center hole of the drum is simply pressed against the drum. The part is raised and fixed at the drum joint of the wire feeder.
The second technique is provided with a lifter that raises the drum itself to the center of the support shaft by a motor. The lifter lifts the drum to a position where the center of the drum and the center of the support shaft are aligned. Is pressed and fixed to the drum.

  However, in the first technique, since the drum is mounted by raising the chamfered portion at the tip of the support shaft and the end of the center hole of the drum, the drum after the drum is mounted, the frame of the wire feeder, It is not possible to widen the interval. Therefore, the stable rotation of the drum is greatly affected by the dimensional accuracy of the drum. In other words, when the drum diameter (outer diameter) is large, the drum rises little, and the drum collar may come into contact with the frame of the wire feeder during operation. In addition, since the heavy drum is lifted only by pressing the drum support shaft, the load on the drum support shaft is increased, and the service life of the wire feeder may be shortened due to a failure.

Accordingly, the present invention provides a technique that can easily attach and remove a heavy drum having a size difference to an apparatus using the drum in order to solve such problems. For the purpose.
Moreover, it aims at providing such a technique in the apparatus which uses a drum.

In order to achieve the above object, the following configuration is provided.
A drum lifter that supports this drum and moves it up, down, left and right to attach or detach the drum around which the wire is wound, to which a roller that allows lateral movement is attached, and a slide base on which the drum is placed; There is provided a drum lifter comprising: a fixed base to which a slope block having an inclined surface serving as a roller track is attached; and a base lifter having a drive cylinder that pushes and pulls the slide base to the side.

Since the roller that enables the lateral movement is attached and the slide base on which the drum is placed is provided, the slide base can be easily moved laterally by the rotation of the roller. Therefore, the drum placed on the slide base can be easily moved sideways.
And since the fixed base to which the slope block having the inclined surface that becomes the track of this roller is provided is provided, the roller rolls on this inclined surface, that is, the subsequent base lifter only presses the slide base to the side. The slide base can be lifted upward with respect to the fixed base.
Furthermore, since a base lifter having a drive cylinder that pushes and pulls the slide base to the side is provided, a lateral force can be applied. Further, even when an external pressure exceeding the allowable level is applied, the load on the moving parts can be reduced. That is, the drive cylinder can absorb the external pressure generated by the difference in the movement amount in a state where the movement amount in the lateral direction cannot be uniquely determined due to the dimensional difference of the individual drums. Therefore, for example, when moving sideways using a motor, the overload applied to the motor and its adjacent parts caused by the difference in the amount of movement is likely to cause damage to these parts, which is superior to using a motor. Yes.
Such a drum lifter has an advantage that it has a simple structure and a small number of parts without taking a complicated structure as in the invention described in JP-A-7-187508 (Patent Document 1). ing.

The drum lifter further includes a drum pusher that presses a side surface of the drum in order to remove the drum from the support shaft.
Since it has a drum pusher that presses the side of the drum to remove the drum from the support shaft, it can be easily and easily connected to the drum support shaft by pressing the drum in contact with the drum support shaft in the axial direction of the support shaft. The drum can be released from. For this reason, the drum can be removed without applying an excessive load to the drum support shaft.

In the drum lifter, the base lifter has a BB holder that protrudes and is pulled from the drive cylinder, and further includes a ball bearing that contacts and presses the slide base against the BB holder, and the drive cylinder and the slide base. It is possible to have a tension coil spring to be connected.
Since the base lifter has a BB holder that protrudes and pulls out from the drive cylinder, a rotatable ball bearing can be attached to the BB holder. Such a BB holder can be fixed to a piston portion protruding from the drive cylinder and pulled back.

Furthermore, since the ball bearing that contacts and presses the slide base is provided on the BB holder, excessive friction is caused even when the BB holder that moves linearly to the side is brought into contact with the slide base that also moves upward. The pressing force can be transmitted from the BB holder side to the slide base side without raising.
And since it has the tension coil spring which connects a drive cylinder and a slide base, the slide base pushed in with the elastic force of the tension coil spring can be returned to an original position. Further, since the tension coil spring can be easily deformed not only in the length direction but also in the bending direction, it can be easily connected to the slide base obliquely above the drive cylinder and pulled back.

Further, the slide base can be formed as a low step surface in which the contact surface with the drum is lowered from the horizontal surface of the slide base.
Since the slide base is formed as a low step surface in which the contact surface with the drum is lowered from the horizontal surface of the slide base, a step can be provided before and after the contact point of the drum with the slide base. Therefore, even if an unexpected force in the front-rear direction is applied to the drum during operation of the drum lifter, it can be prevented from falling from the base lifter by hitting this step. Further, the drum can be positioned by placing it in the step, and the drum can be securely attached to the device.
And by providing a low step part, a member different from a horizontal surface can be set | placed on a low step part. Therefore, it is possible to replace the member for the low step portion that comes into contact with the drum and rubs it, and even if a scratch due to friction with the drum occurs, it can be easily replaced with a new one that does not have a defect.

Further, the slide base may have a stopper that contacts the side surface of the drum and presses the drum laterally.
Since the slide base has a stopper that contacts the side surface of the drum and presses the drum laterally, the drum can be pressed from the side surface of the drum. Further, by providing the stopper, it is possible to avoid the drum from coming into contact with a roller other than the stopper or a roller block that holds the roller. Therefore, these parts can be prevented from coming into contact with the drum and being damaged.
Further, the drum can be prevented from sliding excessively on the slide base, and the drum and the slide base can be integrated to follow the movement of the slide base.
Furthermore, since the stopper can be externally attached and easily exchanged, stoppers of different sizes can be used as appropriate. Therefore, even if the size varies depending on the type of drum, it can be attached and detached by the same operation regardless of the type of drum by replacing the stopper.

Alternatively, there is provided a drum attachment / detachment structure comprising any one of the above drum lifters and a support shaft provided in a device to which the drum is attached, and a support shaft that is sandwiched from both ends of the drum to support and rotate the drum.
A drum attachment / detachment structure including the drum lifter and a support shaft provided in a device for mounting the drum, which is sandwiched from both ends of the drum and supports and rotates the drum, is excessively large in the support shaft sandwiched from both ends of the drum. The drum can be installed and removed without imposing a heavy load.
That is, since the drum can be moved by the drum lifter to a position where the one support shaft and the drum are in proper contact with each other, even when the other support shaft presses and supports the drum, the other support shaft and the drum are properly connected. You can touch and press in position. Therefore, it is possible to prevent an excessive load from being applied to both support shafts, and to attach and remove the drum safely and easily without difficulty.

Alternatively, a wire feeder having any of the above drum lifters or the above drum attachment / detachment structure is provided.
Since it is a wire feeder equipped with the drum lifter or the drum attachment / detachment structure, it is easy for an operator to attach and detach the drum. Machine.

In order to achieve the above object, the following configuration is also provided.
That is, a drum mounting method for mounting a drum around which a wire is wound by a drive-side support shaft and a slide-side support shaft, and the drum is mounted on a flat contact surface in the horizontal direction. Moving the slide base obliquely upward along the inclined surface to bring the end of the center hole of the drum into contact with the drive side support shaft, and contacting the slide side support shaft to the opposite side of the center hole of the drum; A step of bringing the drum into close contact with and pressing and pressing the drum between the two support shafts, and a step of moving the slide base obliquely downward along the inclined surface to separate the slide base from the mounted drum. This is a method of attaching a drum to a device that executes the above.

Because the slide base performs the step of lifting the drum by moving it diagonally upward along the inclined surface, the drum can be lifted without difficulty only by the lateral pressing force to the contact position of the drive side support shaft and the drum. .
Since the step of sandwiching the drum by pressing with the drive side support shaft and the slide side support shaft is executed, the center of the support shaft and the center of the drum are aligned, and the drum can be securely mounted on the device.

Also, a drum removal method for removing a drum around which a wire is wound by a drive-side support shaft and a slide-side support shaft and removing the drum, and a slide base having a flat contact surface in a horizontal direction is inclined. And the step of supporting the drum with the slide base, pulling back the slide-side support shaft, and from the end of the center hole of the contacted drum A step of pulling away, a step of pressing the side surface of the drum to contact the driving side support shaft and pulling the drum away from the driving side support shaft, a step of moving the slide base obliquely downward along the inclined surface and lowering the drum; A method for removing a drum from a device that performs the above is provided.

Since the slide base having a flat contact surface in the horizontal direction is translated obliquely upward along the inclined surface and the contact surface is brought into contact with the bottom of the installed drum, the slide base is softly brought into contact with the drum. Can do.
Further, since the drum is pulled away from the slide-side support shaft or the drive-side support shaft while the drum is supported by the slide base, the drum can be detached without overloading both the support shafts.

According to the drum lifter and the drum attachment / detachment structure of the present invention, it is easy to attach and remove the drum to / from an apparatus using a drum around which a wire is wound.
Further, according to the wire feeder of the present invention, it is easy to mount and remove the drum, and the occurrence of an overload applied to the support shaft at the time of mounting and removing the drum is suppressed, so that there is little failure and high reliability.
Furthermore, according to the drum attachment method and drum removal method of the present invention, it is possible to attach and remove the drum without imposing an excessive burden on the support shaft of the drum mounting device.

It is a perspective view of a wire transmitter. It is a perspective view of a drum lifter. It is a perspective view of a slide base. FIG. 3 is a partially enlarged perspective view of the drum lifter of FIG. 2. It is a perspective view of a base lifter. It is a perspective view of a drum pusher.

The present invention will be described in further detail.
FIG. 1 shows a perspective view of a wire feeder 11 for supplying metal strands from a drum 10 around which metal strands are wound to a stranded wire machine (not shown) for producing electric wires. The wire feeder 11 is provided with a drum lifter 15 for lifting the drum 10 from the position of the fixed base 13 to the position of the support shaft 12.

FIG. 2 shows an external view of the drum lifter 15.
The drum lifter 15 includes a slide base 20 that can be moved upward and laterally (sideward) with respect to the fixed base 13, a base lifter 30 that moves the slide base 20 laterally, and a support for the wire feeder 11. A drum pusher 40 that presses the drum 10 when the drum 10 is removed from the shaft 12.

  As shown in the perspective view of FIG. 3, the slide base 20 has a flat plate portion 21 that is flat in the horizontal direction, and has a low step portion 22 that is one step lower than the flat plate portion 21 at the center. ing. Further, a drive side roller block 23 is provided at the left end of the slide base 20, and a slide side roller block 24 is provided at the right end, and a roller 25 is attached to both the roller blocks 23, 24. A stopper 26 is provided on the flat plate portion 21 adjacent to the slide side roller block 24.

  Both the slide-side roller block 24 and the drive-side roller block 23 are members that rotatably hold the roller 25. In particular, the slide-side roller block 24 is in contact with the ball bearing 34 of the base lifter 30 and receives pressure. Even if the slide-side roller block 24 moves upward, it needs to be in contact with the ball bearing 34. Therefore, the height of the slide base 20 is higher than the moving height. Further, in order to prevent the ball bearing 34 from facing the slide side roller block 24 and force transmission from the ball bearing 34 from being appropriately performed, the slide side roller is provided to prevent the ball bearing 34 from rotating. The block 24 is provided with a bearing receiving portion 24a in which a contact portion with the ball bearing 34 is recessed. The low step portion 22 is a contact surface with the drum 10 and is a portion on which the drum 10 is directly placed. The low stage 22 can be replaced.

  As shown in FIGS. 4 and 2 which are partially enlarged views of FIG. 2, a slope block 16 is fixed to the fixed base 13 with screws 16a. The slope block 16 has an inclined surface 16b serving as a track of a roller 25 (not shown in FIG. 4 where the roller 25 on the near side is omitted) provided on the slide base 20, and the roller 25 is disposed on the inclined surface 16b. By rolling, the slide base 20 is lifted upward when moving to the left. The stopper 26 prevents the slide-side roller block 24 from coming into direct contact with the drum 10 and adjusts the position in the left-right direction between the slide-side roller block 24 and the drum 10.

The base lifter 30 shown in FIG. 5 is a member that moves the slide base 20 that fixes the slide-side roller block 24 shown in FIGS. 2 and 4 in the left-right direction.
The base lifter 30 includes a pneumatic cylinder 31 as a drive cylinder, a BB holder 33, a ball bearing 34, and a tension coil spring 35, and is fixed to the wire feeder 11 by a cylinder base 36.
The pneumatic cylinder 31 presses the BB holder 33 and moves the slide-side roller block 24 contacting the tip of the ball bearing 34 to the left side. The BB holder 33 is connected to a piston portion (not shown) of the pneumatic cylinder 31 and supports a ball bearing 34. The ball bearing 34 is rotatably supported by the BB holder 33 and moves in the left-right direction as the BB holder 33 moves in the left-right direction (side). The tension coil spring 35 has one end fixed to the pneumatic cylinder 31 and the other end fixed to the slide-side roller block 24 through the spring hook plate 24b (see FIG. 4).

The drum pusher 40 shown in FIG. 6 is attached to the wire feeder 11 with a screw 40a and has a pneumatic cylinder 41 as a drive cylinder, and the piston portion 42 coming out of the pneumatic cylinder 41 pushes the side surface 10a of the drum 10. The drum 10 is a member for removing the drum 10 from the support shaft 12. Since the drum pusher 40 operates separately from the slide base 20, it is not fixed to the slide base 20.
Since the drum pusher 40 presses the side surface 10 a of the drum 10, it does not require a pressing force to lift the base lifter 30 on which the drum 10 is mounted. Therefore, the pneumatic cylinder has a lower power than the pneumatic cylinder 31 used for the base lifter 30. 41 can be used.

Next, the operation of the drum lifter 15 will be described according to the procedure for attaching and removing the drum 10 to the wire feeder.
First, when attaching the drum 10 to the wire transmitter 11, the following procedure is performed.
Of the support shafts 12 and 12 of the wire feeder 11, the right slide-side support shaft 12b is separated from the left drive-side support shaft 12a by a distance larger than the lateral width of the drum 10 so that the drum 10 can be received. . The drum 10 carried to the vicinity of the wire feeder 11 is rolled along the guide 18 placed on the tilt table 17 and placed on the drum lifter 15. The distance between the guides 18 and 18 can be made wider than the lateral width of the drum 10 to such an extent that it is not necessary to finely adjust the drum 10 in the left-right direction.
Since the drum lifter 15 includes a low step portion 22 whose central portion is lowered by one step, the drum 10 is accommodated in the low step portion 22 and has a play in the front-rear direction (insertion and withdrawal direction of the drum 10). Even if it does, it does not exceed the stepped portion hitting the flat plate portion 21.

  The base lifter 30 is driven while the drum 10 is on the slide base 20 of the drum lifter 15. The BB holder 33 and the ball bearing 34 that have received pressure from the pneumatic cylinder 31 of the base lifter 30 press the slide-side roller block 24 against which the tip of the ball bearing 34 abuts. The slide roller block 24 that has received the pressure rolls up on the inclined surface 16b of the slope block 16 on the fixed base 13 to the left, and the slide base 20 is lifted upward as the slide base 20 moves to the left. At this time, the BB holder 33 and the ball bearing 34 of the base lifter 30 do not move upward, but are in contact with the slide-side roller block 24 by the ball bearing 34, so that the slide-side roller block 24 moves upward. It can press without giving excessive resistance.

The drum 10 on the slide base 20 similarly moves to the upper left as the slide base 20 moves upward to the left, so that the end of the center hole of the drum 10 approaches to the vicinity of the end of the drive side support shaft 12a. , And touch. The end portion of the drive side support shaft 12a is chamfered in a taper shape, and the end portion of the center hole of the drum 10 joined to the end portion is also chamfered in a shape corresponding to the taper shape. Will come to do. The slide base 20 stops when the end of the center hole of the drum 10 is brought into contact with the drive-side support shaft 12a.
When the drive-side support shaft 12a and the drum 10 are in contact with each other, even if a relative slip occurs laterally between the drum 10 and the slide base 20, the slide base 20 is provided with the stopper 26. No more than 26. In addition, since the pneumatic cylinder 31 is used for the base lifter 30, even when a greater force is applied when the drum 10 contacts the drive side support shaft 12a, the cushion force of the pneumatic cylinder 31 can relieve this. it can. Therefore, even if the chamfered portion of the drum 10 has a dimensional difference for each drum 10 to be attached, the base lifter 30 can be prevented from being overloaded.

Then, the slide-side support shaft 12b of the wire feeder 11 is moved to the drum 10 side, the end of the slide-side support shaft 12b is brought into contact with the end of the center hole of the drum 10, and further pressed to slide with the drum 10 The drum 10 is sandwiched between the drive-side support shaft 12a and the slide-side support shaft 12b while sliding at the chamfered portion of the side support shaft 12b.
Finally, when the piston portion (not shown) of the base lifter 30 is pulled with air pressure, the sliding roller block 24 is pulled back to the lower right side by the restoring force of the tension coil spring 35, and the roller 16 is inclined to the inclined surface 16 b of the slope block 16. Is lowered in the lower right direction, and the slide base 20 returns to the initial position.
Since the slide base 20 is lifted and the drum 10 is attached to the wire feeder 11, a desired interval can be provided between the lower end of the drum 10 and the slide base 20 lowered. Therefore, even if there is a dimensional difference in the drum caliber for each drum, a sufficient interval can be set so that the dimensional difference does not matter.

  Further, the operation of sliding and lifting the slide base 20 can be performed only by pressing the slide lifter 30 laterally, and there is no need to separately provide an upward pressing means different from the lateral pressing means. . Since the operation of the base lifter 30 is performed by the pneumatic cylinder 31, play can be provided both laterally and upwardly even if there is a difference in dimensions between the drums. There is no need to place it at a precise position on the 20.

Next, the case where the drum 10 is removed from the wire feeder 11 will be described.
Since the drum 10 is floating from the slide base 20, the slide base 20 is first lifted up to contact with the drum 10 and the slide base 20 is stopped. This lifting is also performed by pressing the slide base 20 with the base lifter 30. Also in this case, since the pneumatic cylinder 31 is employed, if an excessive force is applied when the slide base 20 comes into contact with the lower end of the drum 10, it can be relieved.
Then, the slide side support shaft 12 b is slid rightward to remove the slide side support shaft 16 b from the drum 10. Even if the slide-side support shaft 12b is removed, the drum 10 is supported by the slide base 20, so that excessive force due to the weight of the drum 10 is not applied to the drive-side support shaft 12a.

After the slide-side support shaft 12b is removed, the drum pusher 40 pushes the piston portion 42 pushed out from the pneumatic cylinder 41 against the side surface 10a of the drum 10, and slides the drum 10 rightward to drive the drive-side support shaft. Remove from 12a.
Finally, when the piston portion of the base lifter 30 is pulled, the slide-side roller block 24 is pulled back to the lower right side by the restoring force of the tension coil spring 35, and the slide base 20 on which the drum 10 is mounted descends and returns to the initial position.
When the drum 10 is removed, the slide base 20 is moved to the right and moved downward, but the slide base 20 is lowered only by pulling to the right using the base lifter 30 as a driving source. The operation can be performed.

The above embodiment is an example of the present invention, and various modifications can be employed. For example, the drum 10 can be detached from the drive side support shaft 12a by pressing the drum 10 manually without using the drum pusher 40.
Further, although a pneumatic cylinder is used as the drive cylinder, a hydraulic cylinder can be used. However, pneumatic cylinders are superior in cushioning properties (compressibility) to hydraulic cylinders, and are excellent in maintainability because no oil is used. And it is excellent in safety in that there is no flammability. For these reasons, pneumatic cylinders are preferred over hydraulic cylinders.
Further, when the drum 10 is removed, the drum 10 is pressed by the drum pusher 40. Since the drum 10 at that time is in a state of receiving the pressing force from the base lifter 30, the drum pusher 40, the base lifter 30, The drum 10 is removed from the drive side support shaft 12a while the pressing forces of the two are balanced. Therefore, it is desirable to employ a pneumatic cylinder in order to perform a desired operation while utilizing such a force collision.

The four slope blocks 16 provided on the slide base 20 have the same inclined surfaces 16b so as to lift the slide base 20 horizontally, but the track of the roller 25 on the drive side roller block 23 side is used. The inclined surface 16b is changed so as to be steeper than the inclined surface 16b of the roller 25 on the slide-side roller block 24 side, so that the drum 10 is slightly inclined so that the drive-side support shaft 16a has a central hole of the drum 10 formed therein. The ends can be contacted. By doing so, the impact at the time of contact between the drive-side support shaft 16a and the end of the drum 10 may be further alleviated.
As described above, changes, replacements, combinations, and the like of the parts used in the above embodiments can be applied without departing from the spirit of the present invention, and such changes are also included in the scope of the technical idea of the present invention. It is.

10 drums (bobbins)
DESCRIPTION OF SYMBOLS 10a Side surface 11 Transmitter 12 Support shaft 12a Drive side support shaft 12b Slide side support shaft 13 Fixed base 15 Drum lifter 16 Slope block 16a Screw 16b Inclined surface 17 Inclined base 18 Guide 20 Slide base 21 Flat plate portion 22 Low step portion 23 Drive Side roller block 24 Slide side roller block 24a Bearing receiver 24b Spring hook plate 25 Roller 26 Stopper 30 Base lifter 31 Pneumatic cylinder (drive cylinder)
33 BB holder 34 Ball bearing 35 Tension coil spring 36 Cylinder base 40 Drum pusher 40a Screw 41 Pneumatic cylinder (drive cylinder)
42 Piston part

Claims (11)

A drum lifter that supports the drum and moves it up, down, left and right to attach or remove the drum around which the wire is wound.
A slide base having a flat contact surface in a horizontal direction on which a roller that allows lateral movement is attached and on which a drum is placed;
A fixed base to which a slope block having an inclined surface to be a track of the roller is attached;
A base lifter having a drive cylinder for pushing and pulling the slide base to the side,
The slide base is a drum lifter that translates diagonally upward or diagonally downward by a roller rolling on an inclined surface of a slope block by the pushing and pulling of the drive cylinder.
The drum lifter according to claim 1, further comprising a drum pusher that presses a side surface of the drum in order to remove the drum from the support shaft.
The base lifter has a BB holder that protrudes from the drive cylinder and is pushed and pulled, a ball bearing that contacts the slide base against the slide base, and a tension coil spring that connects the drive cylinder and the slide base. The drum lifter according to claim 1 or 2, wherein
The drum lifter according to any one of claims 1 to 3, wherein the slide base is formed as a low step surface in which a contact surface with the drum is lowered from a horizontal surface of the slide base.
The drum lifter according to any one of claims 1 to 4, wherein the slide base has a stopper that contacts the side surface of the drum and presses the drum laterally.
The drum lifter according to any one of claims 1 to 5, wherein the drive cylinder is a pneumatic cylinder.
A drum lifter according to any one of claims 1 to 6,
A drum attachment / detachment structure comprising: a support shaft provided in a device to which the drum is attached, and a support shaft sandwiched from both ends of the drum to support and rotate the drum.
The drum attaching / detaching structure according to claim 7, wherein an end portion of the support shaft is chamfered in a tapered shape.
A wire feeder comprising the drum lifter according to any one of claims 1 to 6, or the drum attachment / detachment structure according to claim 7 or 8.
A drum mounting method for attaching this drum to a device that handles a drum around which a wire is wound by sandwiching it between a drive side support shaft and a slide side support shaft,
Horizontally moving a slide base, on which a drum is mounted on a flat plate-like contact surface, obliquely upward along an inclined surface, bringing the end of the center hole of the drum closer to the drive-side support shaft and bringing them into contact with each other; ,
A step in which a slide-side support shaft is brought close to and brought into contact with the end of the drum opposite to the center hole, and the drum is sandwiched between the two support shafts, and mounted.
A method of attaching a drum to a device that performs the step of moving the slide base obliquely downward along the inclined surface and pulling the slide base away from the mounted drum.
A drum removing method for removing this drum from a device that handles the wire around which the wire is wound by sandwiching it between the drive side support shaft and the slide side support shaft,
A step of translating a slide base having a flat contact surface in the horizontal direction obliquely upward along the inclined surface, bringing the contact surface into contact with the bottom of the mounted drum, and supporting the drum with the slide base;
Pulling back the slide side support shaft and pulling it away from the end of the center hole of the drum that has come into contact;
A step of pressing the side surface of the drum and pulling the drum in contact with the drive side support shaft away from the drive side support shaft;
A method of removing the drum from the apparatus, wherein the slide base is translated obliquely downward along the inclined surface and the drum is lowered.

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