JP2002086314A - Supply pipe for surface finishing of part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the a problem of catching of a part in a dent remarkably recessed on a point which is damaged and is continuously damaged by a projec tion on its inner surface on a supply pipe made of a synthetic resin when the edge type projection exists on a corner part of the part or of being unbale to carry the part as a hole is made on the supply pipe when the damages con tinue and carrier air is leaked from there. SOLUTION: A synthetic resin-made external pipe 4 having flexibility is provided, an internal pipe 5 is inserted into its inside, and an irregular shape is added to an inner surface of the internal pipe 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply pipe for parts, and more particularly to a field in which the surface of a part is processed while the part is being conveyed.

[0002]

2. Description of the Related Art As a supply pipe for transporting parts, a supply pipe made of a flexible synthetic resin such as polypropylene is used.

[0003]

If there is an edge-shaped projection at the corner of a part, if the supply pipe is made of synthetic resin, the inner surface of the supply pipe will be damaged by the projection. It can be severely depressed, and parts can be trapped there. Alternatively, as the process proceeds further, a hole is made in the supply pipe, and the carrier air leaks from the hole, making it impossible to carry the parts. Therefore, if the edge-shaped protrusions are removed in advance, there is no such a problem of damage.However, if the edges are removed in the removal step in advance, the productivity is reduced and the cost is disadvantageous. Become.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the invention of claim 1 is directed to an outer tube made of a flexible material. A surface-supply pipe for surface finishing of parts, wherein a metal inner pipe is inserted into the inner pipe, and a number of irregularities are provided on the inner surface of the inner pipe.

When a component is passed through such an inner tube, the edge of the component hits or is rubbed against a number of irregularities, and the edge is broken from the root. Further, the broken fractured surface hits or rubs against the uneven portion of the inner tube during the subsequent transport, and has a rounded surface shape. Through these procedures, the surface is finished during the transport of the component. At the same time, even if there is a gap in the inner tube made of metal, the outer tube made of synthetic resin is placed outside the inner tube, so that the carrier air does not leak outside, and The pressure can be sufficiently applied, and a good transport function can be realized. Needless to say, since the outer tube is not damaged, the problem of perforation of the outer tube can be prevented, and the supply tube has high durability.

According to a second aspect of the present invention, in the first aspect, the inner tube is formed in a state in which a wire is wound in a coil shape.

[0007] Therefore, the inner tube shape can be obtained with a wire material having high wear resistance such as a piano wire, and the closely-connected wire material forms an uneven portion, which performs the surface finishing function as described above. is there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. The parts handled here have a cylindrical shape as shown in FIG. 2, and specifically,
It is a material for molding cup-shaped welding electrodes. This material 1 is formed by molding a copper alloy in a mold, and particularly, edge-shaped projections 2a remain at corners. This projection 2a
Is generally called a "return". Further, the projection 2b may be formed on the cylindrical portion for some reason.

FIG. 1 is a longitudinal sectional side view of a supply pipe 3 according to the present invention, in which an inner pipe 5 is inserted inside a polypropylene outer pipe 4 having a circular cross section, and has a double inner / outer structure. . The outer shape of the inner tube 5 is set smaller than the inner diameter of the outer tube 4, and a relatively loose space S is provided between the two.

The inner tube 5 is a tubular member formed by winding a wire 6 in a coil shape. The valley between adjacent wires 6 is a concave portion, and the inner side of the wire 6 is a convex portion. Are provided with numerous uneven shapes. Here, the inner tube is a coil spring-shaped inner tube, but may be an inner tube made of punched metal or an inner tube formed by forming a number of bellows on a metal tube. Holes or bellows in the punched metal will provide the irregularities.

In FIG. 1, a part 1 is shown by a two-dot chain line, and is conveyed to the right by air. During this transfer,
Since the part 1 is conveyed while swaying, the projections 2 a and 2 b hit the uneven portion of the inner tube 5 and are broken off. Although the broken surface that has been broken is jagged, it is further rubbed on the uneven portion during transportation, and the jaggedness is rounded.

FIG. 3 is a simplified side view showing an example of use of the supply pipe of the present invention. A component 1 as shown in FIG. 2 is loaded on a vibration-type parts feeder 7. Here, the supply pipe 3 is connected to supply components to the component delivery device 8. This device 8
Is for sending out the part 1 temporarily locked in the locking box 9 to a target position, and the supply rod 11 which advances and retreats with the air cylinder 10 extends as shown by a two-dot chain line in FIG. Sign 1
Reference numeral 2 denotes a press-molded female die for receiving the raw material 1. The raw material 1 is inserted into the female die 12 after being fed by the supply rod 11 to this point.

[0013]

According to the present invention, a metal inner tube is inserted into an outer tube made of a flexible material, and the inner surface of the inner tube has a number of irregularities.

When a component is passed through such an inner tube, the edge or the like of the component hits or is rubbed against a number of uneven portions, and the edge portion is broken from the root. Further, the broken surface that has been broken has a rounded surface shape due to hitting or rubbing against the uneven portion of the inner tube during subsequent transport. Through these procedures, the surface is finished during the transport of the component. At the same time, even if there is a gap in the metal inner tube, the outer tube made of synthetic resin is located outside the inner tube, so that the carrier air does not leak outside, and The pressure can be sufficiently applied, and a good transport function can be realized. Needless to say, since the inner tube is not damaged, the problem of perforation of the outer tube can be prevented, and the supply tube has high durability.

What is particularly important is that the component transfer function and the surface finishing function are simultaneously performed. This phenomenon eliminates the need to provide special equipment only for surface finishing, which is advantageous in terms of equipment cost.

By providing the supply pipe with an appropriate curved shape, the above-mentioned surface finishing action is more actively performed because the part positively hits the uneven portion when the part passes through this curved part. .

The inner tube is formed in a state where a wire is wound in a coil shape.

Therefore, it is possible to obtain an inner tube shape with a wire material having high wear resistance such as a piano wire, and the closely-connected wire material forms an uneven portion, which performs the surface finishing function as described above. is there. Since the supply pipe is a coiled inner pipe, when the entire supply pipe is bent, the inner pipe also bends with good flexibility, so that parts can be freely transferred even if the parts transfer route becomes complicated. Furthermore, the protrusions removed from the part become fine particles, which are discharged into the outer tube through the gap between the wires and then discharged by the carrier air. Alternatively, the fine particles are directly conveyed together with the component from the inner tube and discharged to the outside.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 shows the shape of a part, (A) is a three-dimensional view,
(B) is a partially enlarged view.

FIG. 3 is a side view of an apparatus to which the supply pipe is applied.

[Explanation of symbols]

 4 Outer pipe 5 Inner pipe 6 Wire rod

Claims (2)

[Claims] 1. A surface finish of a part, wherein a metal inner tube is inserted into an outer tube made of a flexible material, and a plurality of irregularities are provided on an inner surface of the inner tube. Supply pipe. 2. The supply pipe according to claim 1, wherein the inner pipe is formed by winding a wire into a coil shape.