JPS58339A - Wire handling mechanism - Google Patents

Abstract

PURPOSE:To obtain the titled simple mechanism which performs chucking operation and passing and receiving operation securely, by allowing a wire having a stuck tip chuck to fall in a V-shaped groove in the top surface of a drawing chuck, and further to fall down to a channel-shaped thin-groove bottom part by a magnet. CONSTITUTION:A wire 1 is fed into a pipe 9 by a feed roller 4 and when a tip cap 2 reaches a prescribed position, a chain 8 is moved to move a drawing chuck 14, fitted to the chain 8, in an arc shape along a sprocket 17. Then, the wire 1 is guided into a V-shaped cut groove in the top surface of the chuck 14 to fall down to the bottom, and further attracted by a magnet 16 to fall down to the bottom part of a channel-shaped thin groove 15. Then, the chain 8 further moves to make one flank 14' of the chuck 14 abut against the stepped end surface of the cap 2. Then, the wire 1 is moved by being drawn according to the movement of the chain 8 to expand the pipe 9.

Description

[Detailed description of the invention] The present invention relates to a wire handling mechanism and is reduced to 1%.

The object to be handled is a wire made of twisted steel wires with a step-like end cap fixed to one end of the wire and having an outer diameter larger than the wire diameter.

This relates to a wire handling mechanism in which the stepped part of the tip cap is hooked onto the chunk, and the wire is held by a chuck while being pulled and moved in the length direction of the wire.This mechanism aims to simplify the 0 mechanism and reduce chuck errors. It is something.

FIG. 1 shows an object to be handled in the present invention. 1
is a wire made of twisted steel wires, and a tip cap 2 having an outer diameter larger than the wire diameter is attached to one end of this wire 1.
When the wire is pulled and moved, the hooks are fixed by brazing or the like in a stepped shape.

FIG. 2 shows a conventional vibrator expansion device as an example of this type of wire handling mechanism. This device is used as part of the manufacturing process, for example, evaporators for refrigerators.
It is used when increasing the inner and outer diameters of the vibrator and caulking pipes and fins. In FIG. 2(a), at the tip of the wire 1 there is a tip cap 2 having a diameter smaller than the inner diameter of the pipe 9 to be expanded, and at the other end there is a tube expansion ball 3 having a diameter larger than the inside diameter of the pipe 9 to be expanded. is fixed. The wire 1 is passed through the pipe 9 by the feed roller 4, and the tip cap 2 is placed in a predetermined position.

When the robot reaches the position shown in FIG. 2(a), the auxiliary chuck 5 holds the wire 1 and passes the wire 1 to the waiting tension chuck 6. When the wire 1 is passed to the tension chuck 6, the tension chuck 6 holds the wire 1 by the spring force of the spring 7, and at this time, the end surface of the stepped part of the tip cap 2 comes into contact with the end surface of the tension chuck 6. The end cap 2 is caught on the tension chuck 6, and as shown in FIG. The ball 3 passes inside the pipe 9 and expands the diameter of the pipe.

FIG. 3 is a detailed view of a conventionally used tension chuck, with (a) being a front view and (b) being a side view. 10 is a knob, 11 is a chuck upper piece, 12 is a chunk lower piece, and 13 is a notch machined on the bottom surface of the chuck upper piece. A knob 10 is fixed to the upper surface of the chuck upper piece 11, and a gap is created between the chuck upper piece 11 and the chuck lower piece 12 against the force of the barb 7 that lifts the knob 10, and the tip cap 2 can pass through the gap.

When the lifting force is released from the knob 10, the chuck upper piece 11 and chuck lower piece 12 are drawn together by the force of the barbs 7, and the wire 1 enters the notch 13 in the chuck upper piece 11. Since the notch 13 is formed so that its side surface shape is smaller than the diameter of the tip cap 2, the wire 1 will not come out backward.

However, the above-mentioned conventional technology has the following problems. That is, according to the above-mentioned wire handling mechanism, the wire 1 and the tip cap 2 are passed between the auxiliary chuck 5 and the tension chuck 6, and if the tip of the wire 1 is bent, the receiver causes a passing error. There is a problem that the tip end cap 2 is attached to the chuck upper piece 11. Since the area in contact with the chuck lower piece 12 is small, there is a problem in that the tip cap 2 is seriously damaged and causes a chuck error.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire handling mechanism that solves the above-mentioned problems with the prior art, has a simple mechanism, and ensures reliable chucking and receiving operations.

The feature of the present invention is to achieve the above object.

The wire holder has a 7-shaped cut groove, which serves as an opening for wire introduction during loading, that is cut into the upper surface of the chuck in a straight line from one side that comes into contact with the stepped end surface of the tip cap when pulling the wire, to the opposite side. The bottom of this cut groove is connected to a U-shaped narrow groove that is larger than the wire diameter but smaller than the outer diameter of the tip carriage, which serves as a wire holding part when the wire is pulled, and is further connected to a narrow U-shaped groove. The chuck has a structure in which a magnet is embedded inside the chuck below the bottom of the chuck to attract the wire to the bottom of the narrow groove.

The present invention will be explained below with reference to the drawings.

FIG. 4 shows an embodiment of a tension chuck according to the present invention, and (a) is a sectional view taken along line xx in (b).

(b) is a side view. The tension chuck 14 is made of a rigid metal, and has a V-shaped cut groove on its upper surface that serves as an opening for introducing the wire when the wire 1 is received and removed. The cut groove is cut in a straight line from one walled side 14' to the opposite side 14', and the bottom of the cut groove has a U-shaped narrow groove larger than the wire diameter but smaller than the outer diameter of the tip cap. It is connected to the groove 15. This narrow groove 15 becomes a wire holding portion when the wire is pulled. Also, inside the chuck below the bottom of this U-shaped narrow groove 15.

A magnet 16 is embedded that functions to attract the held wire 1 to the bottom of the narrow groove. With such a chuck structure, when the wire 1 is located at the top of the tension chuck 14, the wire 1 is guided by the V-shaped groove and falls toward the bottom of the groove, and is further attracted by the magnet 16. It will fall to the bottom of the U-shaped narrow groove 15.

FIG. 5 is an explanatory diagram of the wire handling operation when the present invention is applied to pipe expansion. The wire 1 is sent through the pipe 9 by the feed roller 4.

When the tip V-yip 2 reaches a certain predetermined position, the chain 8 begins to move, and the tension chuck 14 attached to the chain 8 begins to move in an arc along the sprocket 17. The wire 1 enters from the upper part of a V-shaped groove cut into the upper surface of the tension chuck 14 and is guided into the U-shaped narrow groove 15. This state is shown in figure (a). When the chain 8 further moves, one side 14' of the tension chuck 14 comes into contact with the end surface of the stepped portion of the tip cap 2, and from then on, as the chain 8 moves, the wire 1 is also pulled and moved, and the pipe Figure (b) shows this state in which the tube is expanded.

According to the present invention, it is possible to carry out wire handling operations without the need for an auxiliary chuck, which simplifies the mechanism and eliminates the problem of mistakes made when the auxiliary chuck chucks the wire, which was a problem in the prior art. Mistakes made when the auxiliary chuck passes the tension chuck are essentially eliminated.
This provides a highly reliable handling mechanism, and the U-shaped narrow groove of the present invention allows for a larger contact area between the tip cap and the tension chuck compared to the triangular notch of the prior art. This has the first effect of reducing damage to the tip cap, which further reduces chuck errors.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the object to be handled in the present invention,
FIG. 2 is an explanatory diagram of a conventional pipe expansion device. FIG. 6 is a front view and a side view of a conventional tension chuck. FIG. 4 is a cross-sectional view and a side view showing an embodiment of the tension chuck of the present invention, and FIG. 5 is an explanatory diagram of handling operation when the present invention is applied to pipe expansion. Explanation of symbols 1...Wire 2.Tip cap 6...Tube expansion pole 4...Feed roller 5...Auxiliary chuck 6...Tension chuck 8...Chain
9... Pipe 11... Chuck upper piece 12... Chuck lower piece 16... Notch 14: Tension chuck 1410, one side 14'... Opposing side 15
... U-shaped narrow groove 16 ... Magnet 17 Sprocket attorney Junnosuke Nakamura

Claims (1)

[Claims] A tip cap with an outer diameter larger than the wire diameter is fixed to one end of the wire in a stepped manner, and the stepped portion of the tip cap is brought into contact with one side of the chuck, while holding the wire with a chunk. In a wire handling mechanism that pulls and moves the wire in the direction of the tip cap, the wire receiver has a V-shaped cut groove that serves as an opening for introducing the wire when the wire is removed, and the end face of the stepped portion of the tip camp when the wire is pulled. The top surface of the chuck is cut in a straight line from one side that comes into contact with the other side to the opposite side, and the bottom of this cut groove has a width that is larger than the diameter of the wire that serves as the wire holding part when the wire is pulled, but smaller than the outer diameter of the tip cap. It is connected to a U-shaped narrow groove with
Furthermore, the wire non-link mechanism is characterized in that it has a chuck structure in which a magnet for attracting the wire to the bottom of the narrow groove is embedded inside the chuck below the bottom of the narrow groove.