JPH0586962U - Pale pack Welding wire presser foot - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a presser foot for a drawer that can prevent continuous knotting and kinking of loops when pulling out a welding wire stored in a pail pack and can perform continuous drawing work. [Structure] Inner presser with a circular inner presser plate with an annular protrusion on the bottom that fits into a cylindrical cavity formed in the center of the pail pack welding wire, and an outer diameter that fits into the pail with almost no gap. A ring-shaped disc having a central hole with an inner diameter larger than the outer diameter of the plate is combined with an outer pressing plate provided with three or more elastic pieces that project inward from the central hole and reach the inside from the outer peripheral edge of the inner pressing plate. In addition, an inclined peripheral wall which is narrower than the outer peripheral edge of the ring-shaped disk is continuously provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a presser foot for pulling out a pail-packed welding wire.

[0002]

[Prior Art]

 In order to efficiently support continuous automated welding by welding robots, which have been widely used in recent years, a packaging method in which a long welding wire is wound and stored in a cylindrical pail has become popular.

In order to prevent the occurrence of twisting after the wire is drawn out, the welding wire produced by the pail pack packaging method is usually stacked and housed in a loop while giving a twist opposite to the winding direction in advance.

As a result, the welding wire in the pail is always subjected to a repulsive force that tries to return the given twist, and this repulsive force spreads the welding wire outward and tries to bounce upward. Since it gives a tendency, when the loop at the starting end is pulled during welding work, a large number of loops jump up with it at the same time, and they may become entangled and cannot be pulled out, so it cannot be used as it is. ..

In order to solve this problem, it is usual to use some kind of withdrawal aid, and the simplest one is a disk-shaped or donut-shaped holding plate, or an elastic member added to these holding plates. A method is used in which a material that comes into elastic contact with a wall is placed on the upper surface of a laminate in which a welding wire is wound.

However, since this type is mainly intended to be pushed in by its weight, in order to obtain a sufficient bounce prevention effect, it must be set to a heavier weight, The increase in frictional resistance due to the weight is unavoidable, and in addition to hindering the smooth feeding of welding wires, it also causes bending and peeling of the copper plating film on the welding wire surface. There is.

[0007] In order to eliminate such drawbacks, many ideas and proposals have been made. For example, FIG. 8 relates to the proposal of the present applicant (Japanese Patent Application No. 3-37041), in which an inner pressing plate 10 provided with an annular protruding portion 9 on the lower surface and a gap is formed outside the inner pressing plate 10. The outer side of the circular disk 11 is supported above the circular disk 11 with a cylindrical hanging wall 12 having a diameter smaller than the outer diameter of the circular disk by an inclined support member 13 provided from the outer circumference of the circular disk at an appropriate distance from the circular disk. A pressing plate 14 is combined and the welding wire is pulled out through a space inside the cylindrical hanging wall 12 from a gap between the two.

[0008]

[Problems to be solved by the device]

 In this case, the frictional resistance can be expected to be reduced to some extent as a result of the weight reduction due to the structure being divided into two, but the inner presser plate 9 is made smaller and lighter, and no restraining force is applied. Since it is in a state where it is not in place, it cannot easily resist the repulsive force of the welding wire and tends to tilt greatly, and the tilted lower end is stuck in the welding wire loop group as shown in FIG. It has the drawback that it cannot be pulled out.

Further, since the pressing force of the inner presser plate is insufficient, unnecessary wire loops following the part being pulled out tend to be pulled out earlier as shown in FIG. This is a direct cause of knots, and if you continue to pull in such a state, the large bent portion of the loop will be pulled without returning the twist, so a hump-like protrusion called a kink (below It is easy to make a kink), and it is easy to cause a situation where it cannot be fed due to clogging at the inlet of the conduit tube.

Further, the occurrence of the copper plating film peeling off or bending due to contact friction at the lower end of the cylindrical hanging wall of the outer pressing plate cannot be ignored.

The present invention, while retaining the advantage of weight reduction by dividing the presser plate, prevents the occurrence of inability to feed due to careless disturbance of the component members, and enables continuous operation over a long period of time. It is an object of the present invention to provide a presser for pulling out a pail pack welding wire, which enables the smooth extraction of the welding wire and also causes less peeling and bending of the copper plating film.

[0012]

[Means for Solving the Problems]

 INDUSTRIAL APPLICABILITY The pail pack welding wire pull-out retainer of the present invention is used for a single-cylinder pail in which the welding wires are stacked and stored in a loop shape so that a cylindrical hollow portion is formed in the central portion. In a circular disc with a circular inner presser plate with an annular protrusion that fits on the underside and an outer diameter that fits in the pail with almost no gap, and a central hole with an inner diameter larger than the outer diameter of the inner presser plate, The object of the present invention is to achieve the object by combining the elastic piece protruding inward from the central hole and reaching the upper surface of the inner pressing plate with the outer pressing plate provided at three or more places.

Further, it is intended to achieve the object more effectively by continuously connecting the inclined peripheral wall which is narrower than the outer peripheral edge of the annular disk.

[0014]

[Action]

 As shown in FIG. 3, the pull-out retainer of the present invention has a cylindrical hollow portion P formed at the center of a welded wire laminated body W, which is stacked and accommodated in the pail 1 in a loop-shaped manner. After placing the inner pressing plate on the upper surface of the welding wire laminated body W with the annular protrusions fitted together, fit the outer pressing plate on the pail tube and place it on the upper surface of the welding wire laminated body W. use.

When placed in this way, the elastic piece provided on the outer pressing plate reaches the upper surface of the inner pressing plate and is positioned above it, so that the elasticity presses the inner pressing plate from above. It becomes a state. As a result, the upper surface of the welding wire laminated body W in the pail is completely covered with the integrated inner pressing plate and the outer pressing plate, so that it is suitable for operations such as transportation and handling. Is used to prevent the initial entrainment form from being easily collapsed.

When pulling out the welding wire, as shown in FIG. 5, in the ring-shaped void portion T formed between the ring-shaped disc of the outer pressing plate and the outer peripheral edge of the inner pressing plate, the starting point starts from the portion without the elastic piece. When S is pulled out and pulled upward toward the center, the welding wire loop L begins to extend along the ring-shaped void while drawing a circumference opposite to the winding direction.

When the welding wire reaches a certain portion of the elastic piece, the elasticity of the welding wire and the pulling force that gradually pulls in the elastic piece work together to push the elastic piece upward, and the welding wire is shown in FIG. It will pass under the elastic piece. When the welding wire has finished passing, the elastic piece immediately returns to the old shape and begins to work to hold down the inner presser plate.Each time the welding wire reaches the elastic piece part, this operation is repeated and welding is performed. The wire is pulled out.

Therefore, during the operation of pulling out the welding wire, the inner presser plate is always kept pressed by the elastic force of the elastic piece without being freed for a moment, and the inner presser plate is large. There is no fear of rising or tilting. Further, since the outer pressing plate is fitted in the pail cylinder with almost no gap, and the inner pressing plate is restricted in displacement by fitting the annular protruding portion in the cylindrical cavity P, the displacement is restricted in a substantially fixed position. Such actions are repeated, and these actions work together to effectively prevent the occurrence of disordered actions.

Further, since the pressing force applied to the upper surface of the welding wire laminated body does not loosen for a moment, it effectively prevents the unnecessary loop portion continuing to the welding wire portion being pulled out from escaping early. It is what makes up.

Further, if inclined peripheral walls that are narrower than the outer peripheral edge of the ring-shaped disk are continuously provided, as shown in FIG. 7, the feeding path of the welding wire is narrowed down to a narrow range at the outlet portion of the inclined peripheral wall. Therefore, the path to the apex of the umbrella-shaped lid to which the conduit tube is attached is stabilized within a very narrow certain range, and the welding wire feeding operation is made extremely stable.

[0021]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 5 show an embodiment of the present invention. An annular protruding portion fitted into a cylindrical cavity portion P formed at the center of a welding wire laminated body W which is laminated and housed in a loop in a pail 1. 2 is provided on the lower surface, and a circular inner pressing plate 3 having a diameter that covers a portion of the upper surface of the welding wire laminate W about one third of its inner circumference and an outer press-fitting plate 3 that fits into the pail 1 with almost no gap. A ring-shaped disk 5 having a diameter, a diameter larger than that of the inner pressing plate 3 and having a central hole 4 of an inner diameter that creates a ring-shaped void portion T at an appropriate distance from the outer circumference of the inner pressing plate. The elastic pieces 6 projecting inward and reaching the inside from the outer peripheral edge of the inner pressing plate 3 are configured by combining with the outer pressing plate R1 radially provided at four locations.

It is necessary to provide the elastic pieces 6 at least at three places in order to achieve the function, but it is optional to provide more than three pieces, and all are arranged at equal intervals in consideration of the operation balance. Of course, it is preferable.

FIG. 2 shows an example of an outer pressing plate R2 provided with an inclined peripheral wall 8 having an upper recess having an opening 7 having a diameter smaller than the outer peripheral edge of the annular disk 5.

The protruding direction of the elastic piece 6 on the outer pressing plate 5 is not limited to the direction toward the center thereof, but may be an oblique direction forming a certain angle from the center direction as shown in FIG. When the welding wire is pulled out, an obtuse angle is formed in the direction following the pulling out of the welding wire. It can be done smoothly.

It is suitable that both the inner pressing plate and the outer pressing plate are made of a synthetic resin such as polypropylene or ABS resin in terms of durability and cost, but it is not necessary to use other materials as appropriate. The elastic piece 6 may be made of synthetic resin such as polyethylene or polypropylene, or rubber such as SBR so as to be attached to the annular disc 5, or may be integrally formed of the same material as the annular disc. Good.

[0026]

[Effect of the device]

 The presser for pulling out the pail pack welding wire of the present invention has the constitution of claim 1 so that it does not loosen up during the drawing-out movement of the welding wire and is not loosened. The regular operation enables the welding wire to be stably fed with a constant rhythm, and enables continuous withdrawal work without the suspension of feeding due to the occurrence of kinks and kinks due to early escape of unnecessary loops. It is a thing.

Further, since the drooping edge-like portion that strongly contacts the welding wire and generates friction is eliminated, it is possible to prevent the copper plating film on the welding wire surface from peeling off or bending due to excessive friction.

Further, according to the configuration of claim 2, the route to the top of the umbrella-shaped lid body to which the conduit tube is attached is stabilized within an extremely narrow fixed range, so that the factor of disturbance in the feeding of the welding wire is reduced. It is possible to carry out continuous withdrawal work.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the outer pressing plate.

FIG. 3 is a vertical cross-sectional view showing a usage state of the embodiment of FIG.

FIG. 4 is an enlarged partial vertical cross-sectional view in the use state of FIG.

5 is a plan view showing a usage state of the embodiment of FIG. 1. FIG.

FIG. 6 is a plan view showing a usage state of another embodiment.

FIG. 7 is a partial vertical sectional view showing a usage state of the embodiment of FIG.

FIG. 8 is a partial vertical cross-sectional view showing a usage state of a conventional product.

[Explanation of symbols]

1 ... Pail, 2 ... Annular protrusion, 3 ... Inner pressing plate,
4 ... central hole, 5 ... annular disc, 6 ... elastic piece, 7 ... opening, 8 ... inclined peripheral wall, R1, R2 ... outer holding plate, P ... cylindrical cavity, S ... starting end, L ... loop, T ... Ring-shaped void, W ... Welding wire laminate.

Claims (2)

[Scope of utility model registration request] 1. A single-cylinder pail for stacking and accommodating a welding wire in a loop shape so that a cylindrical hollow portion is formed at a central portion thereof, wherein an annular protruding portion fitted into the cylindrical hollow portion is a lower surface. In a circular disc having a central inner hole larger than the outer diameter of the inner presser plate at the outer diameter that fits into the pail with a circular inner presser plate fitted with almost no gap, A holding tool for pulling out a pail pack welding wire, which is formed by combining elastic pieces reaching the upper surface of the inner pressing plate at three or more places with an outer pressing plate. 2. A presser for pulling out a pail pack welding wire according to claim 1, wherein inclined peripheral walls which are narrower than the outer peripheral edge of the ring-shaped disk are continuously provided.