JP2001242284A - Method and structure for taking out channel box piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of failing to lift a CB (channel box) piece in the case of alignment being shifted by several millimeters although only the completely aligned CB pieces are liftable in a device for taking out only one piece in good order by remote operation out of a box containing a plurality of CB pieces in the water. SOLUTION: An aligning mechanism pushes the CB piece by a positioning guide from the protruding side of V-shape cross section of the CB piece into the recessed side direction. Maintained in this state, the CB piece is moved into a specified position by another CB piece pressing cylinder. An oscillating suction pad and a sliding claw mechanism are added to a lifting mechanism to cover eccentricity of scores of millimeters. Particularly in a slide mechanism, the second CB piece serves as a reference stopper, so that one CB piece can be positively lifted by a claw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CB piece which is stable in a pre-process of a volume reduction device which performs a volume reduction process by plasma cutting as a pre-process for discarding a fuel channel box in which a fuel rod of a reactor pressure vessel internal structure is placed. The method of taking out.

[0002]

2. Description of the Related Art In a conventional volume reduction device, CB pieces stored in a CB storage box are taken out one by one from the storage box, the leading end thereof is gripped by a hanging tool, moved to a cutting device, and set at a predetermined position.

[0003] After being set, it is cut and stored in a collecting device.

The CB take-out device of the volume reduction device is a device for aligning several CB pieces at a time and lifting them one by one at the top. Instead of pressing from the left and right with the cylinder, and then pushing into the positioning guide with the CB piece moving cylinder.
The B-side pushing direction is pushing from the concave side of the U-shape. If the CB piece is slightly inclined during alignment or the right and left frictional forces at the time of movement are different, the leading end may be displaced from the center of a predetermined position. The CB pieces rotate at the time of alignment, and the gaps before and after tend to decrease, so that they hardly return to the original state.

Further, since the positioning guide is fixed and is not attached to the CB piece lifting mechanism, the CB piece becomes a sliding surface when the CB piece moves vertically, and the CB piece is laterally moved (the CB piece comes off from the suction pad). To receive power.

[0006] The suction mechanism is a fixed system in which the pad portion and the whole body are not equipped with a swing mechanism.

[0007] Since the lifting claw is structured so as to protrude from the positioning guide by the thickness of one CB piece on the CB side, there is a problem that if the alignment is slightly displaced, the CB piece cannot be picked up at the tip. .

[0008]

A conventional CB piece take-out device requires two positioning guides if it is not precisely aligned.
There is a problem that one CB piece cannot be lifted vertically (vertically) with a lifting claw because the sides do not adhere.

The CB lift cannot be lifted because the CB pieces are cut into two pieces by cutting a square box with a total length of about 5 m in the longitudinal direction with a cutting device. This is when some rotation and deviation occur.

[0010] At present, the claw hooks at the time of lifting are lifted one by one, so that the thickness of the CB piece is about 3 mm. If the tip is inserted further into the CB side more than this, two or more sheets will be lifted, and the processing in the post-process cannot be performed.

When the depth is shallow, the work stops because there is no mechanism for adjusting the detachment from the nail.

Similarly, since the suction pad is of a fixed type and cannot follow the displacement of the CB, there is a problem that the suction is not performed if the tip of the CB piece is displaced.

In addition, since the positioning guide is fixed even when the system of lifting with the claw is completed, the slidable surface separates from the suction pad due to the undulation and inclination depending on the shape of the CB piece at the time of lifting. CB in the horizontal direction
There is also a phenomenon where the piece moves and falls down. If it cannot be lifted because it is underwater, it is essential to restore it by turning on the diver.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new structure for a method of taking out CB pieces, a lift claw, a suction pad, and a lifting mechanism in order to shorten the process by ensuring the reliability of the apparatus in water. is there.

[0015]

In order to achieve the above-mentioned object, in the present invention, it is judged that all the pieces cannot be centered by only the CB piece alignment mechanism, and a slight displacement is assisted by another mechanism. It is possible to lift one CB piece by combining a suction pad with a pin, a positioning guide that moves up and down, a lift claw that securely inserts into the bottom of the lower part of the CB piece, and a mechanism that slides the claw. I do.

In any of the first and fourth aspects of the present invention, the CB cut pieces are individually suspended in the water from the air by a crane operation into the CB storage box, regardless of the irregular shape after loading.
By pushing in from the convex side of the rectangular shape of the B piece, it is possible to particularly precisely align the tips. (Experimental results compared to our company) In Claims 2, 3, and 5, several sheets of CB are used with lift claws.
After lifting one piece at a time, holding one CB piece with the suction pad, lowering the nail in this state and sliding it backward, then raising, advancing, and raising only the nail, the CB piece 1
It becomes possible to put a sheet on a nail.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a conventional embodiment will be described with reference to FIGS. 1, 2, and 3, and an embodiment of the present invention will be described with reference to FIGS.

FIGS. 1, 2, and 3 are drawings of a conventional lifting mechanism.

FIGS. 1 and 2 show conceptual views of a CB piece taking-out apparatus. The following procedure is used to lift the CB pieces 1 stored in the storage box 2 one by one.

That is, conventionally, in order to align the CB pieces, the CB pieces are pushed into each other from the side direction by an air cylinder, centered, and then pushed toward the positioning guide 5 by the CB piece pressing cylinder 11.
And supports the metal fitting at the tip of the rod of this cylinder. The storage box temporary storage rack 3 is fixed, and the CB cantilever truck 6 is a mechanism for moving forward to a predetermined position after setting the CB canister 2 with the carriage moving air cylinder 7.

The CB piece 1 moved to a predetermined guide position by the CB piece pressing cylinder 11 holds one CB piece by the suction pad 14 and the CB piece lifter claw 13 held at the tip of the CB piece lifting air cylinder 4. At this time, since the positioning guide 5 is attached to the frame of the lifting cart, the positioning guide 5 does not move up and down by the cylinder and is fixed.

This device is installed on the upper part of the lower frame 8 and the intermediate frame 9. Figure 3 shows CB before alignment and after pushing
The relationship between the piece 1, the positioning guide 5, and the lifter claw 13 is shown. If the CB pieces are not centered at equal intervals, the CB pieces will not reach or come into contact with the fixed lifter claws 13, and the suction pad 14 will have the same tendency, and cannot be lifted. When the CB piece is not vertical when the piece is raised, a rotation moment is generated from the fixed positioning guide 5 so that the fixed suction pad comes off and the CB piece on the claw 13 is shifted and falls. There is.

FIG. 4 shows an embodiment of the present invention which solves the above-mentioned problems and provides a stable CB cantilever lifting mechanism.
This will be described with reference to FIG.

FIG. 4 shows details of the CB take-out device, and FIG. 5 shows details of the suction pad.

The CB piece lifter pawl 13 was moved horizontally by a pawl slide cylinder 18 and was allowed to move vertically by a pawl lift cylinder 17.

The suction pad 14 is provided with a partial swing and a center pin 19 by means of a connecting pin 15 and a spring 16 so that the suction pad 14 has a whole movement and regulates a swing angle by a slot 20.

The equipment that can be lifted by the CB piece lift air cylinder 4 includes a CB piece lift claw 13, a suction pad 14, and C
The B piece positioning guide 5.

The procedure for lifting each CB piece one by one is as follows.

In order to return the rotating CB piece to a predetermined position, the CB piece is pressed from the convex side, that is, the claw side, toward the CB piece pressing cylinder 11.

The pressing can be performed by extending the stroke of the carriage moving air cylinder 7, applying the positioning guide 5 to the surface of the CB piece, and performing the stroke until all the CB pieces come into close contact.

Since the tip of the cylinder 11 has a rectangular shape, this is the reference.

Next, while maintaining this state, the cylinder is returned by the cylinders 7 and 11 to a predetermined position capable of lifting.
The lifter pawl 13 set at the lower portion of the B piece is fed by the pawl slide cylinder 18 and then lifted up a little by the pawl lift cylinder 17.

After lifting, the suction pad is activated to operate the first C
Hold the piece B. While maintaining this state, lifter claw 13
Is lowered, and after the descent, the claw slide cylinder 18 is pulled to leave one CB piece and return the other CB pieces to the bottom of the CB storage box.

Next, the pawl stopper cylinder 21 is operated downward, and the pawl lift cylinder 17 is operated to raise the lifter pawl to the stopper position.
8 is advanced toward the CB piece and brought into contact with the CB piece, whereby the claw is located at the lower portion of one CB piece that can be lifted reliably.

Here, by operating the claw stopper cylinder 21 in the direction of returning to the original position, the stopper and the claw lift cylinder 17 move at the same speed, and the lifter claw comes into contact with the CB piece held by the suction pad.

In the case of a contact failure, the suction pad 14 is demagnetized to open to the atmosphere, separated from the CB pieces, and then excited again to enable contact.

Thereafter, the entire cycle is completed by lifting the entire body by the CB piece lift air cylinder.

In accordance with this procedure, every single C
Piece B can be processed.

[0039]

The CB piece lifting mechanism has a claw slide mechanism,
Equipped with a reciprocating cylinder mechanism for swinging suction mechanism, guide lifting, and alignment, and by implementing the method, it is possible to lift one CB piece in water, greatly shortening the process, improving work reliability, It is possible to reduce the exposure of workers.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a conventional CB take-out device.

FIG. 2 is a conceptual diagram of a conventional CB piece alignment and lifting mechanism.

FIG. 3 is a conceptual diagram of CB piece storage.

FIG. 4 is a diagram of a CB take-out device according to the present invention.

FIG. 5 is a detailed view of a suction pad portion according to the present invention.

[Explanation of symbols]

1 CB piece, 2 CB storage box, 3 storage box temporary storage rack,
4 CB piece lift air cylinder, 5 CB piece positioning guide, 6 CB cantilever truck, 7 trolley moving air cylinder, 8 bottom frame, 9 middle frame, 10 air cylinder, 11 CB single pressing cylinder, 12 ...
Guide bar, 13: CB single lifter claw, 14: suction pad, 15: connection pin, 16: spring, 17: claw lift cylinder, 18: claw slide cylinder, 19: center pin, 2
0: elongated hole, 21: claw stopper cylinder.

Claims (5)

[Claims] 1. Prior to grasping one piece of CB piece from a channel box (hereinafter referred to as CB) storage box in water and cueing to a predetermined position, the convex side of the CB piece in order to align the whole piece In order to lift the CB piece, C
A method for removing a CB piece, comprising a mechanism for pushing the B piece with a cylinder. 2. A plurality of sheets of C.sub.B after being aligned in a stage before grasping one piece of CB from the CB storage box in water and cueing to a predetermined position.
A nail slide mechanism is provided in which the B piece is lifted simultaneously by the claw, only one of the CB pieces is held by the suction pad and the other CB piece is removed from the claw surface, and then the CB piece is lifted by the claw again. A CB piece removal method characterized by the above-mentioned. 3. A CB piece unloading method characterized in that a CB swinging mechanism is provided on a CB piece suction pad for grasping one CB piece from a CB storage box in water and cueing to a predetermined position. 4. The push-in structure according to claim 1, wherein a single air cylinder having a convex fitting at one end is provided on one side, and a V-shaped positioning guide is provided on the lifting mechanism on the other side.
CB, characterized in that the lifting mechanism is used for one-sided pressing, and the entire lifting mechanism is horizontally moved by an air cylinder until it comes into close contact with an air cylinder with a convex fitting, so that the CB is pushed in.
One-side alignment mechanism. 5. The mechanism according to claim 2, further comprising a cylinder as a lifting mechanism in addition to the positioning guide according to claim 4, which is provided exclusively with a cylinder for sliding the lifter claws independently left and right and a cylinder for raising and lowering by several tens of millimeters. A CB cantilever lifting mechanism that raises and lowers the whole with another cylinder, a structure in which the suction pad is pin-coupled to the support frame to maintain the swing angle by a spring, and a plurality of suction pads are connected by a frame to lift the center A CB piece take-out structure characterized by having a structure in which a pin is connected to a frame of a mechanism.