JPH059236B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to a process in which resin pipes, tubes, rods, shafts, etc. (hereinafter simply referred to as shaft-like objects) are butted together and fused together using a mandrel welding machine. The present invention relates to an alignment device for aligning shaped objects.

Prior Art Figures 5 and 6 show an example of a mandrel welding machine, in which a pair of holders 2, 2 are fixed on a rail 1, while the other is slidably attached, and the lever 3 is operated to move the holder onto the rail. A heater 5, which is slidably and pivotally supported on a guide bar 4 parallel to the rail 1, is arranged to be tilted down between both holders, and each holder is provided with a shaft 6,
6 are aligned and installed, operate the lever 3 to move the holder 2 in the direction of the arrow, push and move the heater 5 with the shaft 6 held by the holder, and move the heater 5 to the end of the shaft supported oppositely. After pressing the ends of both shafts into a molten state, the heater is lifted up, and then the holder is moved in the direction of the arrow by lever operation, and both shafts are brought together and welded. When welding to prevent the shafts from shifting, it is necessary to align the center lines of both shafts.
For this reason, both holders have cylindrical parts 7, 7 that are aligned, and alignment is achieved by passing the shaft through these, but with this method, if the diameter of the shaft differs, the cylindrical part must be replaced with one that matches it. It won't happen.

Problems to be Solved by the Invention An object of the present invention is to provide an alignment device for a mandrel welding machine that can easily and simply align shaft-like objects of any diameter.

Means for Solving the Problems According to the present invention, this device has a pair of jigs provided with V-grooves arranged on the left and right sides, supports at least one of them so as to be movable toward the other, and each V-groove is are the same, the bottom end of the groove is located on one horizontal axis, and the angles made with the reference plane including the axis are the same, and each V-groove has a support attached to the jig. It is equipped with a presser metal fitting that is supported so that it can be raised and lowered.

That is, the present invention provides the above-mentioned centering device for a mandrel fusion machine that aligns a shaft-like object made of resin using a centering device, melts both opposing end surfaces with a heater, and then butts and fuses the resin-made shaft-like object with a V. At least one of a pair of jigs provided with grooves is supported so as to be horizontally movable toward the other, the V-grooves of each jigs have the same angle, the lower ends of the grooves are located on one horizontal axis, and The angle formed by the reference plane including the axis and the V-groove is the same, and a presser metal fitting is provided on each V-groove to be movably supported by supports individually attached to the jig.

Figure 3 is a diagram showing the principle of alignment using this device, where the angle of the V groove is α, and the bottom end of the groove is the origin o of the orthogonal coordinates.
The angle that the bisector of the groove makes with the x-axis is β,
If the diameter of the shaft-like object 6 that fits into the V-groove is r, the coordinates (xy) of the center c of the shaft-like object are x=r cosec 1/2
It is expressed as α·cosβ, y=r cosec 1/2α·sinβ, and if r is constant, the center of the shaft-shaped object that fits into the V-groove under the same conditions will always be constant. Therefore, if jigs with V grooves with the same conditions are placed on the left and right,
As long as the diameters of the shaft-like objects that fit into each V-groove are the same, their center lines coincide.

In this device, in order to make it easy to fit and take out the shaft-like object, it is desirable that the presser metal fitting can be opened and closed at a position where it holds down the shaft-like object and at a position away from this position. It is also possible to push the shaft-like object through the jig or pull it out from the jig, but when both shaft-like objects are connected, especially as they become longer, it is not easy to pull them out.
On the other hand, if the presser can be opened and closed, the shaft-like object can be easily fitted into the V-groove or taken out from above.

When using a presser, the diameter of the shaft-like object is small and V
If the shaft-like object fitted in the groove cannot be held down, the fourth
As shown in the figure, a V-shaped auxiliary jig 9 is used.
so that it is installed in the groove.

Embodiment Of a pair of jigs 11, 11 with V-grooves, one is mounted on a fixed base 12 fixed to the rail 1, and the other is mounted on a movable base 13 slidably attached to the rail 1. , installed under the same conditions,
A presser metal fitting 15 is disposed on each V-groove and is supported by screwing onto a gate-shaped support 14.
is prevented from rotating by a pin 16 supported by a support 14, and is raised and lowered by rotating a handle 17. The support 14 is divided into upper and lower parts and connected by pins 18 on both sides. When one pin 18 is removed, the upper support rotates upward together with the presser metal fitting 15 around the other pin 18, and opens. It's getting wet.

The present device is constructed as described above, and the shaft 6 welded to each V-groove is fitted, and the handle 17 is turned to hold the shaft 6 with the presser metal fitting 15 in cooperation with the V-groove to hold the shaft. As a result, the center lines of both axes coincide, and alignment is performed. Thereafter, as described above, the lever 3 is operated to move the shaft 6 held by the jig 11 on the movable base along the rail 1, and the heater 5 is moved to the jig 11 on the fixed base. Press it against the shaft 6 to be held. After both shaft ends are in a molten state, the heater 5
is lifted, and then both shaft ends are joined and welded. After welding, one pin 18 is removed, the upper support is lifted around the other pin 18, and both connected shafts are removed.

Effects of the Invention As described above, the alignment device of the mandrel welding machine of the present invention arranges a pair of jigs having V grooves on the left and right sides with the angle, inclination, height, and position of the V grooves set to the same conditions. , and while at least one of both jigs is supported so as to be movable horizontally, a presser metal fitting supported movably up and down by a support attached to each jig is provided on the V-groove, and in the V-groove of each jig. The fitted shaft-like objects are supported by the holding metal fittings, and the left and right supports are independent of each other, so even if the supports are deformed due to unbalanced loads, Moreover, a shaft-shaped object of any diameter can be reliably gripped by the holding fixture on the jig and aligned accurately, and the gripping force can also be adjusted appropriately.

[Brief explanation of drawings]

FIG. 1 is a side view of a mandrel welding machine equipped with an alignment device according to the present invention, FIG. 2 is a front view of the same, and FIG.
4 is a diagram showing the principle of the present invention, FIG. 4 is a diagram with an auxiliary jig installed, FIG. 5 is a plan view of the mandrel welding machine, and FIG. 6 is a front view of the same. 1...Rail, 2...Holder, 3...Lever,
4...Guide bar, 5...Heater, 6...Shaft, 9...
...Auxiliary jig, 11...Jig, 12...Fixing stand, 1
3...Movable base, 14...Support, 15...Press fitting, 16...Pin, 17...Handle, 18...
…pin.

Claims (1)

[Scope of Claims] 1. The above-mentioned centering device of a mandrel fusion machine, which aligns a shaft-like object made of resin using a centering device, melts both opposing end surfaces with a heater, and then abuts and fuses them. , of a pair of jigs with V-grooves,
At least one side faces the other and is supported so as to be horizontally movable, the V grooves of each jig have the same angle, the lower end of the groove is located on one horizontal axis, and the V groove forms a reference plane including the axis. A centering device for a mandrel welding machine in which the corners are the same and each V-groove is provided with a presser metal fitting that is movably supported by supports individually attached to a jig. 2. The centering device for a mandrel welding machine according to claim 1, wherein the support is vertically rotatable.