JPH081253Y2 - Jig for twisted welding wire - Google Patents

Description

TECHNICAL FIELD The present invention relates to a twisting welding wire drawing jig, and particularly to a drawing jig that prevents the winding of the wire winding from loosening when drawing the wire from the wire winding body. It is about.

2. Description of the Related Art A wire winding body, in which a welding wire used as a welding electrode is twisted around an axis and wound around a cylindrical core tube, is described in JP-A-57-199758. Figure 6 shows
One example of such a wire winding body, and such wire winding body
74 is a wire 10 which is supplied from above while being prevented from twisting around the axis and is wound clockwise around the core tube 48 as shown by arrow B. 360 ° per turn in the direction indicated by arrow C around the center
Is given a twist. In such a wire winding body 74, the twist of the wire 10 is returned when the wire 10 is pulled out upward during use, and therefore the wire 10 having no twist is pulled out without rotating the wire winding body 74 around the axis. . 6A is a plan view of the wire winding body 74, and FIG. 6B is a vertical sectional view.

By the way, in a wire winding body in which a wire having a twist about its axis is wound, when the wire drawing is stopped, the elastic force of the twist given to the wire causes the wire to spring out I was sometimes rewound. That is, as indicated by the arrow f in FIG. 6, the wire is twisted and wound around the axis.
Reference numeral 10 is an element that tries to spring out to the outer peripheral side of the wire winding body 74 by an elastic force (elastic restoring force) that returns the twist and becomes a straight line. Then, when the wire bounces and is unwound excessively in this way, the winding of the wire winding body loosens,
The wire may become entangled, making it impossible to withdraw or cutting it.

On the other hand, for example, as shown in FIG. 7, a guide member 90 for guiding the wire 10 along the outer peripheral edge when the wire 10 is pulled out is provided at the upper end of the wire winding body 74, and the guide member 90 is provided. A large number of elastically deformable elastic bodies 92 that engage with the wire 10 are arranged on the outer peripheral portion of 90, and such elastic bodies are provided.
It is conceivable to prevent excessive rewinding by engaging the wire 92 with the wire 10. Since the wire 10 is bent around from the outer peripheral edge of the guide member 90 from the lower side to the upper side, an elastic force f ′ that tries to straighten the wire 10 acts, and eventually the wire 10 has the elastic force. The resultant force F of the elastic force f based on f ′ and the twist acts. The arrow A in FIG. 7 indicates the rewinding direction of the wire 10 when the wire 10 is pulled out, and the elastic body 92 is inclined in the direction opposite to the rewinding direction A thereof.

However, when the elastic body is inclined in the direction opposite to the rewinding direction as shown in FIG. 7, it is necessary to elastically deform the elastic body in the opposite direction when pulling out the wire. Therefore, a large pull-out resistance acts on the wire, and the pull-out resistance may damage the wire.

When the elastic body 94 of FIG. 8 is inclined in the same direction as the rewinding direction A, the wire 10 can be easily pulled out while elastically deforming the elastic body 94.
Is drawn while rotating while sliding on the outer side of the elastic body 94, the wire 10 is unlikely to engage with the inner side of the elastic body 94 when the drawing is stopped, and prevents the wire 10 from bouncing to the outer peripheral side. There is no effect of preventing the wire 10 from being excessively unwound.
When the withdrawal of the welding wire 10 is stopped, the wire 10 generally returns slightly to the winding body side from the welding device side to cause slack, and the bulge in the direction of the elastic force f ′ engages with the linear elastic body 94. In addition, it is difficult, and even if it is engaged, the wire 10 easily separates to the outer peripheral side along the inclination of the elastic body 94, and a sufficient unwinding preventing effect cannot be expected.

Means for Solving the Problems The present invention has been made to solve the above problems, and its gist is that a welding wire, which is twisted about its axis, has a cylindrical shape. When the wire is pulled out upward from the wire winding body wound around the outer periphery of the core tube and arranged so that the axis is in a substantially vertical direction, the wire is pulled upward so that the twist of the wire is returned. A drawing jig for preventing the winding of the wire winding body from being loosened by the elastic force and loosening the winding of the wire winding body. (A) A disk shape having a diameter larger than that of the wire winding body is formed. A guide member that is attached to the upper end of the core tube of the wire winding body in a substantially concentric manner and guides the wire drawn upward along the outer peripheral edge; and (b) extends from the outer peripheral edge of the guide member in a substantially normal direction. The extension part to be extended and the wire from the tip of the extension part. L with a bent portion that is bent at a substantially right angle in the unwinding direction of the ear
A plurality of wires are formed on the outer peripheral portion of the guide member and elastically deform when the wire is drawn out to allow the wire to be rewound along the outer peripheral edge. It has an elastic body that prevents the wire from bouncing to the outer peripheral side and being unwound by the elastic force of itself by the engagement of the bent portion and the wire when stopped.

Action By attaching such a drawing jig to draw out the wire, the wire is engaged with the elastic body provided on the outer peripheral portion of the guide member, so that the wire is guided along the outer peripheral edge of the guide member. Rewinding in the direction is restricted. That is, when the wire is pulled upwards,
Since the wire rotates along the outer peripheral edge of the guide member and is rewound while elastically deforming the elastic body, a certain resistance is imparted based on the elastic force of the elastic body. When is stopped, the wire is prevented from being unwound excessively by the engagement with the elastic body.

Here, the elastic body of the present invention includes an extending portion extending from the outer peripheral edge of the guide member in a substantially normal direction, and a bending portion bent from the tip of the extending portion in a wire rewinding direction at a substantially right angle. Since it has an L-shape with and, when the wire is pulled out, the wire can be pulled out relatively easily by elastically deforming the extending portion in the rewinding direction.

On the other hand, when the wire drawing is stopped, the wire slightly returns from the welding device side and loosens, so that when the portion located at the peripheral portion of the guide member swells based on the elastic force f ′, the L-shaped shape is formed. It is engaged with the inside of the bent portion of the tip of the elastic body. When the wire is pulled out, a relatively large tension is generated, and the wire is bent with a small radius of curvature at the peripheral edge portion of the guide member. Therefore, the elastic force f ′ is large, and when the tension is reduced when the pulling is stopped, the wire is Swells in the direction of the elastic force f '. Further, since the bent portion is bent at a substantially right angle in the rewinding direction, the bent portion is bent at a substantially right angle with respect to the wire which is about to spring out to the outer peripheral side according to the resultant force F of the elastic force f ′ and the elastic force f based on the torsional deformation. Once engaged, the wire is effectively prevented from springing out and excessive rewinding of the wire is avoided.

In addition, it is preferable to provide as many elastic bodies as possible in order to extremely finely control the rotation of the wire, that is, rewinding, and at least eight or more elastic bodies should be provided at equal angular intervals, depending on the diameter size of the wire winding body. Is desirable.

Effect of the Invention As described above, according to the drawing jig of the present invention, the wire can be relatively easily drawn out, and the wire is not unwound more than necessary when the wire is drawn out or stopped. The winding of the wire winding body is satisfactorily prevented from becoming loose and entangled, and the wire can always be smoothly pulled out.

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

In FIG. 1, 74 is a wire winding body in which the welding wire 10 used as a welding electrode is wound around the core tube 48 in a roll shape. For example, as shown in FIG. 6, this wire winding body 74 is a core tube in which the wire 10 supplied from above is rotated clockwise as indicated by arrow B while preventing twisting around the axis. It is wound around the outer circumference of 48 and its wire
A twist of 360 ° per turn is applied to 10 around the axis in the direction indicated by arrow C. Then, it is fixed to the core tube 48 by a binding band 70 wound around four places in the circumferential direction so that the winding is not loosened. Further, the core tube 48 has a cylindrical shape without a collar, is made of paperboard such as cardboard or plywood, and is disposable after the wire 10 is used.

The wire winding body 74 is transported while being placed on the pallet 72, and is arranged in the vicinity of a predetermined welding machine with its axis centered in a substantially vertical direction. Then, the binding band 70
After removing the wire, the drawing jig 76 shown in FIGS. 2 and 3 is attached to the upper end of the core tube 48, and the tip of the wire 10 is drawn upward from the outside of the drawing jig 76 to be used as a welding machine. Connecting. As a result, the wire 10 is sequentially pulled out from the wire winding body 74 with the operation of the welding machine and used as a welding electrode. Since the twist of the wire 10 is returned when the wire 10 is pulled upward, the wire 10 without twist can be pulled out without rotating the wire winding body 74 around the axis.

The drawing jig 76 is configured to include a guide member 78 having a disk shape having a diameter larger than that of the wire winding body 74, and a large number of beard portions 80 provided on the outer peripheral portion of the upper surface of the guide member 78. There is. The guide member 78 is made of a resin material such as vinyl chloride, and an annular projection 82 integrally provided on the lower surface of the guide member 78 is fitted into the upper end of the core tube 48 to center and position the upper end of the core tube 48. It is supposed to be done. Also, rubber ring 84
The hook member 86 attached to the core tube 48 is inserted into the core tube 48 through the circular hole in the central portion and hooked on the pallet 72 as shown in FIG. Lightly fixed in a non-rotatable state. As a result, the wire 10 drawn out from the wire winding body 74 is rewound along the outer peripheral edge of the guide member 78 while being rotated in the counterclockwise direction indicated by the arrow A in FIG.

On the other hand, the beard 80 is an elastic body and is made of an elastic resin material such as nylon. This beard
As shown in FIG. 5 in which the peripheral edge portion of the guide member 78 is enlarged, the reference numeral 80 indicates an extending portion 80b extending from the outer peripheral edge of the guide member 78 in the substantially normal direction, and the tip of the extending portion 80b. Has an L shape and a bent portion 80a bent substantially at right angles in the rewinding direction A, and is fixed to a mounting hole formed in the guide member 78 at the base end side of the extending portion 80b. ing. Further, the beard 80 has a predetermined angle θ with the upper surface of the guide member 78.
So that it can be engaged with the wire 10 that is pulled out from the wire winding body 74 and bent around the outer peripheral edge portion of the guide member 78 at a substantially right angle as it is inclined upward. It has become. Incidentally, FIG. 2 and FIG.
In the figure, the beard 80 is shown enlarged, at equal angular intervals.
Only 36 whiskers 80 are shown, but actually 10
About 0 to 200 are provided.

If the wire 10 is pulled out by attaching such a pull-out jig 76, the wire 10 is engaged with the beard 80 provided on the outer peripheral portion of the guide member 78, thereby
The movement of 10 along the outer peripheral edge of the guide member 78 in the circumferential direction is restricted. That is, when pulling out the wire 10,
Since the wire 10 is rotated in the rewinding direction A along the outer peripheral edge of the guide member 78 and is rewound while elastically deforming the beard 80, a certain resistance is imparted based on the elastic force of the beard 80. Further, when the pulling-out of the wire 10 is stopped, the wire 10 is prevented from being unwound excessively by the engagement with the beard 80.

Here, the beard 80 of the present embodiment is bent at a substantially right angle in the rewinding direction A from the extended portion 80b extending from the outer peripheral edge of the guide member 78 in the substantially normal direction and the tip of the extended portion 80b. Since it has an L shape with a bent portion 80a,
When the wire 10 is pulled out, the wire 10 can be pulled out relatively easily only by elastically deforming the extending portion 80b in the rewinding direction A as shown in FIG.

On the other hand, when the pulling out of the wire 10 is stopped, the wire 10 slightly returns from the welding device side and loosens, so that the portion located at the peripheral edge portion of the guide member 78 is based on the elastic force f ′ that tends to extend straight. When inflated, it is engaged with the inside of the bent portion 80a of the beard 80 having an L-shape. For example, when the withdrawal of the wire 10 is stopped in the state of FIG. 5 (a), the wire 10 is rewound in the rewinding direction A as shown in FIG. 5 (b) due to the elastic force of the beard 80 as the tension decreases. When it is pushed back in the opposite direction and further loosened, it is engaged with the bent portion 80a of the previous beard 80 according to the elastic force f'as shown in Fig. 5 (c). When pulling out the wire 10,
Since a relatively large tension is generated and the wire 10 is bent at the peripheral edge of the guide member 78 with a small radius of curvature, the elastic force f ′ is large, and when the tension decreases as the pulling is stopped, the wire 10 becomes elastic. It expands in the direction of force f '.

Further, since the bent portion 80a is bent at a substantially right angle in the rewinding direction A, in the state of FIG. 5 (c),
According to the resultant force F of the elastic force f ′ and the elastic force f based on the torsional deformation, the wire 10 that is about to be ejected to the outer peripheral side is engaged at a substantially right angle, and the ejection of the wire 10 is effectively prevented, and the extra wire 10 Rewinding is avoided.

As described above, by using the pull-out jig 76, the wire 10 can be pulled out relatively easily, and
When the wire 10 is pulled out or stopped, the wire 10 is not unwound unnecessarily, the winding of the wire winding body 74 is satisfactorily prevented from becoming entangled, and the wire 10 can always be smoothly pulled out. is there.

Although one embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other modes.

For example, the beard 80 of the above-described embodiment is inclined upward by an angle θ in order to intersect the wire 10 at a substantially right angle, but it may be provided so as to extend outward in a plane parallel to the guide member 78. It doesn't matter.

Further, in the above embodiment, both the guide member 78 and the beard 80 are made of resin material, but it goes without saying that these may be made of other material such as metal material. In addition, wire winding
As the material of the core tube 48 of 74, a resin material or a metal material can be used.

Further, in the above-described embodiment, the drawing jig 76 is attached to the wire winding body 74 by the hook 86, but other attachments such as a clasp that engages with the core tube 48 and the guide member 78 are provided. Means can also be employed.

Although not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a wire winding body in which a wire is drawn using a drawing jig according to the present invention. FIG. 2 is a plan view of a drawing jig which is an embodiment of the present invention. Third
The drawing is a vertical cross-sectional view showing a state in which the extraction jig of FIG. 2 is attached to the wire winding body. FIG. 4 is a plan view showing a portion where a hook provided on the drawing jig shown in FIG. 2 is hooked on a pallet. FIG. 5 is a diagram for explaining a form of engagement between the elastic body and the wire when the pulling out of the wire is stopped. FIG. 6 is a diagram illustrating an example of a winding method of winding a wire so that a twist is applied around the axis. FIG. 7 is an explanatory view of a main part of a drawing jig having an elastic body that is inclined in a direction opposite to a wire rewinding direction. FIG. 8 is an explanatory view of a main part of a drawing jig having an elastic body inclined in the same direction as the wire rewinding direction. 10: Wire, 48: Core tube 74: Wire winding body, 76: Drawing jig 78: Guide member, 80: Beard (elastic body) 80a: Bending portion, 80b: Extension portion A: Rewinding direction

Claims (1)

[Scope of utility model registration request] 1. A wire winding body in which a welding wire twisted around an axis is wound around an outer periphery of a core tube having a cylindrical shape, and the axis is arranged in a substantially vertical direction. When pulling out the wire upward so that the twist of the wire is returned, the pull-out jig for preventing the wire from bouncing to the outer peripheral side due to its own elastic force and loosening the winding of the wire winding body. A wire-shaped member having a diameter larger than that of the wire winding member and attached substantially concentrically to the upper end of the core tube of the wire winding member, and guiding the wire drawn upward along the outer peripheral edge. A guide member, an extending portion extending from the outer peripheral edge of the guide member in a substantially normal direction, and a bent portion bent from the tip of the extending portion in the wire rewinding direction at a substantially right angle. Form an L shape,
A plurality of guide wires are provided on the outer periphery of the guide member, and when the wire is pulled out, the wire elastically deforms to allow the wire to be rewound along the outer peripheral edge. A pull-out treatment for a twisted welding wire, comprising: an elastic body that prevents the wire from bouncing to the outer peripheral side and being unwound by the elastic force of itself by the engagement of the bent portion and the wire. Ingredient