JPH08122274A - Visual inspection device of metallic thin plate material for nuclear fuel - Google Patents

Abstract

PURPOSE: To simply and reliably perform inspection by coping with even metallic thin plate materials having a long size coil length of 200m in the case of inspecting external appearance of the metallic thin plate materials being the material of a support grid for nuclear fuel. CONSTITUTION: A pair of bobbin receiving stands 4 respectively hold a bobbin 1 round which metallic thin plate materials 3 such as inconel are wound and a winding bobbin 2 so as to be freely mountable and demountable, and are provided with motive power parts 5 to respectively rotate these bobbin receiving stands 4 and clutch parts 6 interposed between the motive power parts 5 and the bobbin receiving stands 4. External appearance of the metallic thin plate materials 3 is inspected while winding them round the winding bobbin 2 from the original bobbin 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind-up type visual inspection apparatus for a thin sheet metal material for a nuclear fuel, particularly for forming a supporting lattice material which is a component thereof.

[0002]

2. Description of the Related Art A support grid which is a component of a fuel assembly has a thickness of 0.3 to 0.5 mm, a length of about 200 mm and a width of 50 to 50 mm.
It is formed by combining a large number of 60 mm Inconel thin plates in a lattice shape, and the metal thin plate material as the raw material is wound into a coil before press cutting.

In the visual inspection of such a coil metal thin plate material, since the coil length is about 20 to 30 m in the past, the coil is manually stretched for inspection, or the coil is wound into a coil by a thin plate manufacturer. I had to do a visual inspection.

[0004]

However, recently, since the coil length of the above-mentioned thin metal plate material has become as long as about 200 m, it is practically impossible to perform a visual inspection of the above-mentioned manual stretching, and the coil winding by the above-mentioned manufacturer is impossible. Also in the inspection at the time, there is a problem that the winding speed is increased due to the increased coil length, and the possibility of overlooking the defect of the thin metal plate material is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and provides a coil handling device having a novel structure, and an object of the present invention is to satisfactorily perform a visual inspection of a thin metal plate material having a long coil length. .

[0006]

That is, the feature of the appearance inspection apparatus of the present invention which meets the above-mentioned object is that an atom in which a pair of bobbins are erected in parallel at a predetermined interval and wound around one bobbin. An apparatus for inspecting the appearance of the above-mentioned thin metal sheet material while winding the thin metal sheet material for fuel around the other bobbin, and a pair of bobbin pedestals for holding the respective bobbins detachably, and a pair of bobbin pedestals of these bobbin pedestals. A power unit disposed below and rotating each bobbin pedestal, and a clutch unit interposed between the bobbin pedestal and the power unit, for intermittently rotating the power unit to the bobbin pedestal. Is equipped with.

Further, the clutch portion of the above-mentioned device of the present invention is constituted by a clutch plate which overlaps with each other and a clutch pin which penetrates these clutch plates and is integrated with each other, and the clutch pin is pulled out from a mating surface of the clutch plate. It is also possible to impart frictional resistance to prevent the above-mentioned thin metal plate material from bending.

[0008]

In the above apparatus of the present invention, the bobbin on which the thin metal plate is wound is fixed to one of the two bobbin receiving bases, while the bobbin on the winding side is fixed to the other bobbin receiving base. The clutch part on the bobbin side is turned on and rotated by the power part, and the thin metal plate material is taken up from the wound original bobbin. At this time, the clutch portion on the original bobbin side is turned off, but the rotation resistance generated from the clutch portion or the like causes the thin metal plate material to be wound around the winding side bobbin without causing any bending.

Then, the appearance inspection of the thin metal plate material is conducted by the following method between the two bobbin pedestals during winding.
It is performed visually from both front and back sides or continuously by a camera, a VTR, or the like.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view showing a state of use of an inspection apparatus according to an embodiment of the present invention, FIG. 2 is a plan view showing the same, FIG. 3 is a front view showing a winding portion on one side of the apparatus of the embodiment, and FIG. In the apparatus of the above embodiment, a pair of bobbins 1 and 2 are erected in parallel at an interval of about 1 m as shown in FIGS. Inconel thin plate material 3
While being wound around the bobbin 2 on the right side of the drawing, the visual inspection of the Inconel thin plate material 3 is performed by two visual inspectors H from both sides as shown in FIG.

The apparatus of the above embodiment has a pair of winding parts having the same structure shown in FIGS. 3 and 4, and the winding parts respectively include the bobbins (core tubes) 1 and 2. A pair of bobbin receiving bases 4 which are detachably held, and a power unit 5 which is arranged below the bobbin receiving bases 4 and rotates the bobbin receiving base 4.
And a clutch unit 6 interposed between the bobbin receiving base 4 and the power unit 5 for interrupting the rotation of the power unit 5 to the bobbin receiving base 4.

As shown in FIGS. 3 to 5, the bobbin pedestal 4 has a cross-shaped pedestal body 7 having a shaft 4a at its center, and four elongated holes formed in the pedestal body 7. 8
And four pins 9 for fixing bobbins, which are respectively inserted and fixed in the elongated holes 8. As shown in FIG. 6 to FIG. 8, the pin 9 is horizontally slidable in the long hole portion 8, and the edge portion 10 at the bottom of the long hole portion 8 is clamped by the fixing screw 11, so that the bobbin It is possible to fix the first and second members at positions where they are pressed from the inside.

On the other hand, the power unit 5 is, as shown in FIG. 3, a perforated shaft 12 into which the shaft 4a of the bobbin receiving base 4 is rotatably fitted, and an electric motor for rotating the perforated shaft 12. And the electric motor unit 13
Can be remotely controlled by the speed adjustment knob 14a, the forward / reverse rotation knob 14b, and the drive button 14c of the controller 14.

As shown in FIGS. 1 and 3, the clutch portion 6 includes two upper and lower clutch plates 15 and 16,
Pin holes 17 formed in the upper and lower clutch plates 15 and 16
And a clutch pin 18 that is inserted through. As shown in FIG. 5 and the like, the upper clutch plate 15 is fixed to the intermediate portion of the shaft 4a of the bobbin receiving base 4, and the lower clutch plate 16 is, as shown in FIG. 3, the perforated shaft 12 of the power unit 5. It is fixed to the upper end of.

The clutch portion 6 is turned on when the clutch pin 18 is inserted into the upper and lower clutch plates 15 and 16.
Then, the rotation of the power unit 5 is continued to the bobbin pedestal 4, and the clutch pin 18 is pulled off to turn it off, so that the bobbin pedestal 4 is free from the power unit 5. At the time of the OFF state, the frictional resistance of the mating surfaces of the upper clutch plate 15 and the lower clutch plate 16 prevents the thin metal plate member 3 shown in FIG.

Therefore, in the apparatus of the above-mentioned embodiment of the present invention,
As shown in FIGS. 1 and 2, the bobbin 1 on which the thin metal plate 3 is wound is fixed to the left bobbin receiving base 4, and the winding bobbin 2 is fixed to the right bobbin receiving base 4. This fixing method is as shown in FIGS. 5 to 7. First, as shown in FIG. 5, the bobbin 1 is placed on the main body 7 of the bobbin base, and then, as shown in FIG. The fixing pins 9 are temporarily fixed to the oblong holes 8 of the pedestal body 7 with the fixing screws 11, respectively. Then, the fixing pins 9 are spread outward, and the fixing screws 11 are tightened while the bobbin 1 is pressed from the inside as shown in FIG. 7, and the fixing pins 9 are finally fixed.

In this state, the clutch portion 6 on the side of the bobbin 1 that is wound up is off because the clutch pin 18 is pulled out as shown in FIG. 1, and the clutch on the side of the winding bobbin 2 is on. Has become.

Then, the power unit 5 on the winding side is operated to move the original bobbin 1 to the thin metal sheet 3 as shown in FIG.
Take up. Due to the action of the frictional resistance of the clutch portion 6 described above, the thin metal plate material 3 during winding does not bend even if the original clutch portion 6 on the bobbin 1 side is free, and the winding side bobbin 2 remains as it is. Is taken up by.

The appearance inspection of the thin metal plate material 3 is as follows.
Thus, during the winding, as shown in FIG.
It is continuously performed by a VTR or the like.

Although the embodiments of the present invention have been described above, the apparatus of the above embodiments can be rewound.

[0022]

As described above, the visual inspection apparatus for a thin metal sheet material for nuclear fuel according to the present invention detachably holds the bobbin wound with the thin metal sheet material such as Inconel and the winding bobbin. A pair of bobbin pedestals, a power unit for rotating each of these bobbin pedestals, and a clutch unit provided between the power unit and the bobbin pedestal are provided, and while winding from the original bobbin to the winding bobbin. The above-mentioned metal thin plate material is to be inspected for appearance, and the above-mentioned inspection can be carried out by sufficiently corresponding to the coil length of the metal thin plate material extended to about 200 m. If there are many defects, the winding speed is adjusted. Further, the reverse rotation facilitates re-inspection, and has a remarkable effect that the visual inspection can be performed without fail.

Since the Inconel material serves as a support grid, it is desirable to suppress scratches and the like on the appearance as much as possible. However, in the apparatus of the present invention, the scratches can be prevented without rubbing the Inconel material on the floor. It is possible.

Further, by forming the frictional resistance portion on the mating surface of the clutch portion, it is possible to suitably prevent the thin metal sheet material from being bent during winding with a simple structure.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of an inspection apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view showing a winding portion on one side of the apparatus of the embodiment.

FIG. 4 is a plan view of the same.

FIG. 5 is a cross-sectional view showing a first step of a method of fixing the bobbin receiving base of the apparatus of the embodiment.

FIG. 6 is a cross-sectional view showing a second stage of the method for fixing the bobbin receiving base of the apparatus of the embodiment.

FIG. 7 is a sectional view showing a third step of the method of fixing the bobbin receiving base of the apparatus of the embodiment.

[Explanation of symbols]

 1, 2 bobbins 3 thin metal plate 4 bobbin pedestal 4a shaft 5 power part 6 clutch part 7 cradle main body 8 long hole part 9 fixing pin 10 edge part 11 fixing screw 12 holed shaft 13 electric motor part 14 controller 14a speed Adjustment knob 14b Forward / reverse rotation knob 14c Drive button 15 Upper clutch plate 16 Lower clutch plate 17 Pin hole 18 Clutch pin

Claims (2)

[Claims] 1. A pair of bobbins are erected in parallel at a predetermined interval, and a visual inspection of the metal sheet is carried out while winding the metal sheet for nuclear fuel wound on one bobbin on the other bobbin. An apparatus for performing the operation, comprising a pair of bobbin pedestals that detachably hold the bobbins, and a power unit that is arranged below the bobbin pedestals and that rotates the bobbin pedestals, respectively.
A visual inspection apparatus for a thin metal sheet material for a nuclear fuel, comprising: a clutch portion which is respectively interposed between the bobbin receiving base and the power unit, and which has a clutch unit for connecting and disconnecting the rotation of the power unit to the bobbin receiving base. . 2. The clutch portion is composed of a superposed clutch plate and a clutch pin penetrating through the clutch plates to be integrated with each other, and the metal when the clutch pin is pulled out from a mating surface of the clutch plate. The visual inspection device for a thin metal sheet material for a nuclear fuel according to claim 1, wherein a frictional resistance is provided to prevent the thin sheet material from bending.