JPH0721550B2 - Method and device for shredding used channel box - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shredding method and device for further shredding a channel box volume-reducing piece volume-reduced into a member having an L-shaped cross section. .

[Conventional technology]

Conventionally, as shown in FIG. 12 (a), as a means for reducing the volume of a tubular used channel 90 having a storage space inside, by cutting the opposite corner portions 901 in the longitudinal direction. A method of dividing into two members 92 having an L-shaped cross section as shown in FIG. 2B is generally adopted (Japanese Patent Laid-Open Nos. 53-27795 and 59-187298,
(See JP-A-62-257093, etc.). Such a cross section L
The character-shaped members 92 can be housed in a relatively small basket 94 as shown in FIG.

Further, as a means for shredding the channel box, Japanese Patent Laid-Open No. 55-26407 discloses that the four corners of the channel box are simultaneously cut vertically by roller cutters, and the flat plates thus cut are cut horizontally. It is shown cut off. Further, in JP-A-59-174792, a channel box is pressed into a compressed flat plate shape,
After that, it is shown that the volume is cut by cutting in the lateral direction.

[Problems to be Solved by the Invention]

Conventionally, when a member having an L-shaped cross section that has been divided by the method disclosed in Japanese Patent Laid-Open No. 53-27795 is further shredded, its corners are cut in the vertical direction to form two flat plates, and then Means such as shredding each flat plate must be taken.
However, in such a process, two independent processes, that is, a vertical cutting and a horizontal cutting have to be performed, which requires a long processing time, and an independent device for each of the vertical cutting and the horizontal cutting. However, there is an inconvenience in that the installation space must be taken large.

Further, in the shredding method disclosed in Japanese Patent Application Laid-Open No. 55-26407, it is necessary to cut four corners in the vertical direction at a time, so special cutting means such as a roller cutter is required.
This roller cutter wears more severely and has a shorter life than a normal shearing cutter. For this reason, the number of times of cutter replacement work is large, and it is particularly inconvenient for the treatment of the channel box, which is radioactive waste, in terms of exposure prevention.

The press disclosed in Japanese Patent Laid-Open No. 59-174792 can also be used with a press.
Since it is necessary to cut the flat plates stacked on one another at a time,
It is difficult to use shears and various fusing methods must be used. Such fusing is not suitable for treating a channel box which is a radioactive waste, because a large amount of secondary waste such as gas, fume, dross and suspended solids is generated as compared with the above shear. In addition, the torch (electrode / nozzle) is heavily worn, and the number of times it is replaced is high.

Furthermore, the methods and devices shown in the two latter publications are:
It is applied to the division of the channel box which has not been volume-reduced yet, and the cross section L has already been applied to other general devices.
It is not suitable for efficiently shredding a member that has been cut into a letter shape.

In view of such circumstances, it is an object of the present invention to provide a method and a device that can efficiently shred a channel box volume-reducing piece that has been previously cut into a member having an L-shaped cross section.

[Means for Solving the Problems]

The present invention is a method for shredding a channel box volume-reducing piece having an L-shaped cross section, in which the corner portions of the channel box volume-reducing piece are vertically sheared by a predetermined dimension, and the two pieces are divided by this shearing. Each of the two pieces is sheared in the lateral direction and separated from the other part, and the longitudinal shearing and the lateral shearing are repeated (claim 1).

The present invention also provides, as an apparatus for performing the above method, a feeding means for feeding the channel box volume reducing piece in a vertical direction, a clamp member for clamping the channel box volume reducing piece, and a channel box volume reducing piece in the vertical direction. A vertical cutter that extends and shears the corner portion of the channel box volume-reducing piece that is clamped by the clamp member to shear the corner portion, and extends in the lateral direction of the channel box volume-reducing piece. And a horizontal cutter that is provided with a vertical shift and is pressed against two pieces divided by the vertical cutter while the channel box volume-reducing piece is clamped to separate the pieces from other parts. And (Claim 2).

[Work]

First, according to the method of claim 1, the vertical cutting of the corner portion of the channel box volume-reducing piece and the horizontal cutting of the two pieces divided by the vertical cutting are alternately repeated to obtain a cross section L. The V-shaped channel box volume reduction piece is continuously divided into strips.

Specifically, according to the device of claim 2, first, a predetermined portion of the channel box volume-reducing piece having an L-shaped cross section is kunrapped by a clamp member, and a vertical cutter is pressed against a corner portion of the clamped portion. After the corner is sheared by a predetermined size, the clamp is opened. Then, the channel box volume reducing piece is re-clamped after being fed in the vertical direction by a predetermined amount, and the longitudinal shearing is continuously performed, and a horizontal cutter is provided on each piece divided by the longitudinal shearing. By being pressed, both pieces are separated from the other part.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

The channel box shredding device shown in FIG. 2 includes a conveying device 10 and a shearing device 12, and a strip collecting device 14 is arranged below the conveying device 10 and the shearing device 12. The strip collecting device 14 includes a collecting drum 16 and a carriage 18. Further, a basket 20 is installed in the vicinity of the channel shredding device, and a member having an L-shaped cross section (hereinafter referred to as an L-shaped member) in which a channel box is divided into two by a known method in advance in the basket 20. A lot of 22 are stored.

The transfer device 10 includes a carriage 23 that moves in the X direction in the figure with respect to the ground, and a rail 24 that extends in the Y direction in the figure is fixed to the carriage 23 and is movable along the rail 24. A telescopic device (feeding means) 26 is attached. The expansion / contraction device 26 is composed of a plurality of tubular members having different diameters, and is entirely expandable / contractable in the vertical direction (Z direction). A grip member 28 for gripping the upper end of the L-shaped member 22 is provided at the lower end thereof. Has been. That is, the expander / contractor 26 has a function of moving in the XY directions while gripping the L-shaped member 22 and also sending the L-shaped member 22 in the Z direction (longitudinal direction) by expanding and contracting itself.

The overall structure of the shearing device 12 is shown in FIG.

The skeleton of the shearing device 12 is generally composed of four column members 30, upper horizontal channel members 31 to 34 and lower horizontal channel members 35 arranged between the column members 30.

A hydraulic cylinder 36 is fixed to the inner surface of the upper horizontal channel member 31, and a movable clamp (clamp member) 38 as shown in FIG. 3 is fixed to a rod 361 of the hydraulic cylinder 36. The movable kun lamp 38 has a concave clamp surface 381 that matches the cross-sectional shape of the L-shaped member 22, and a groove 382 extending in the up-down direction (vertical direction) is formed at the center thereof.

As shown in FIGS. 1 and 4, a fixed clamp (clamp member) 40 is provided at a position facing the movable clamp 38.
Are arranged. This fixed clamp 40 is provided on the left and right support plates 4
Upper horizontal channel material 32,33,34 through 1,42 (Fig. 1)
Is fixed to the side and the clamp surface of the movable clamp 38
Convex clamping surface 4 that clamps L-shaped material 22 together with 381
Have 01.

A push-cut blade mounting base 43 is incorporated in the fixed clamp 40 so as to be movable toward the movable clamp 38. The push-cut blade mounting base 43 is passed over a rod 441 of a hydraulic cylinder 44 fixed to the upper horizontal channel member 33, and a guided groove guided in a guide groove formed on the fixed clamp 40 side is provided above the rod 441. It has a part 421.

A push-cutting blade (vertical cutter) 46 extending in the vertical direction (vertical direction) is detachably attached to the tip of the push-cutting blade mounting base 43. The push-cut blade 46 has a tapered blade whose projection amount decreases as it goes downward, and is formed at the end of the fixed clamp 40 by the action of the hydraulic cylinder 44 as shown in FIG. It moves between a position where it is housed in the concave portion 402 and a position where it projects into the groove 382 of the movable clamp 38 which faces as shown in FIG.

On the other hand, in FIG. 1, the upper horizontal channel members 31, 32 are
And the horizontal channel material
Mounting channel members 50a and 50b are fixed to the corners formed by 31,34 in the direction of an angle of 45 °. Hydraulic cylinders 52a, 52b are fixed to the inner surfaces of these mounting channel members 50a, 50b, and as shown in FIG. 8, the movable blades are attached to the rods 53a, 53b of the hydraulic cylinders 52a, 52b ( Horizontal cutters 54a and 54b are fixed.

Both moving blades 54a and 54b are arranged on a horizontal plane 56 as shown in FIG.
And an acute-angled blade sandwiched between the inclined surfaces 57. On the other hand, on the lower surface of the fixed clamp 40, both moving blades 54a, 54b
The receiving blades (horizontal cutters) 41 are fixed at the positions corresponding to the moving blades 54a, 52b by the operation of the hydraulic cylinders 52a, 52b.
The a and 54b are adapted to move between a position immediately below the movable clamp 38 (position indicated by a solid line in FIG. 9) and a position reaching the receiving blade 41. Further, the moving directions of the two movable blades 54a, 54b are set to be directions perpendicular to the clamp surface.

Further, below the hydraulic cylinder 44, a channel box volume reducing piece support device 60 as shown in FIG. 5 is arranged. This channel box volume reduction piece support device 60
Is a device for supporting the lower end portion of the L-shaped material 22 when the last shredding of the L-shaped material 22 is performed as described later, and the shredding length of the L-shaped material 22 can be adjusted. Therefore, it is composed of the following members.

The supporting device 60 has a base 61, and guided cylinders 62 are fixed to both sides of the base 61, and the guided cylinders 62 are fixed to the frame side of the shearing device 12 by a rod 58. It penetrates vertically. Further, a nut member 63 having a screw hole is fixed to the base 61, and a ball screw 59 is screwed into the nut member 63, and the ball screw 59 is rotationally driven by a motor or the like (not shown). This allows the base 61 to move up and down along the rod 58.

On this base 61, a hydraulic cylinder 64 and two rods
65 is arranged in parallel with the hydraulic cylinder 44, and
A stopper 66 is fixed to a rod 641 of 64. The rod 65 penetrates both wings of the stopper 66, and the stopper 66 is moved by the operation of the hydraulic cylinder 64.
The stopper 66 is adapted to move in and out along the movable blades 54a and 54b.

Next, a method of shredding the L-shaped member 22 by this apparatus will be described with reference to FIGS. 10 and 11 together.

First, the telescopic device 26 of the transfer device 10 is moved to a position above the basket 20, and the grip member 28 holds one L-shaped member 22.
The L-shaped material 22 is conveyed to above the shearing device 21.

On the other hand, in the shearing device 12, the movable clamp 38 is separated from the fixed clamp 40 (two-dot chain line in FIG. 6), and both moving blades 54a,
54b is projected to a position where the tip reaches the receiving blade 41 below the fixed clamp 40. In this state, as shown in FIG. 10 (a), the L-shaped member 22 is lowered to a position where it abuts on the upper surfaces (horizontal plane 56 in FIG. 9) of the movable blades 54a, 54b.
That is, the L-shaped member 22 is positioned in the vertical direction by the movable blades 54a and 54b.

Next, move the movable clamp 38 to the fixed clamp 40 side,
As shown in the solid line in FIG. 6 and in FIG. 10 (b), the lower part of the L-shaped member 22 is clamped by both clamps 38, 40. In this state, as shown in FIG. 7, by driving the push-cutting blade 46 in the fixed clamp 40 in the direction of projecting into the groove 382, the push-cutting blade 46 moves the corner portion of the L-shaped member 22. Shear vertically. As a result, as shown in FIG. 11 (a), a cut 220 is formed at the lower corner of the L-shaped member 22.
The lower end is divided into two pieces 22a and 22b at the boundary of 20.

Next, as shown in FIG. 10 (c), the movable clamp 38
And return both moving blades 54a, 54b to the standby position, and
Is further lowered. This descending dimension is based on the above-mentioned cut 220
The size of the moving blades 54a, 54b is set to be slightly smaller than the size of the above, so that the positions of the moving blades 54a and 54b are slightly lower than the upper end position of the cut 220. Then, as shown in FIG. 10 (d),
The L-shaped member 22 is re-clamped by both clamps 38, 40, the corners of the L-shaped member 22 are continuously sheared in the longitudinal direction by the push-cut blade 46, and then the moving blade 54b is moved to the solid line position in FIGS. To the position indicated by the chain double-dashed line. Due to the shearing force between the moving blade 54b and the receiving blade 41, as shown in FIG.
One piece 22b divided by 220 is cut in the lateral direction and separated from the other part. The separated piece 22b is housed in the collecting drum 16 below. Similarly, the movable blade 54a is projected as shown in FIG. 10 (e), and the remaining piece 22a is separated from the other portion as shown in FIG. 11 (c). As described above, by repeating the operations shown in FIGS. 10 (c) to 10 (e), shearing in the longitudinal direction and the transverse direction is performed, and the L-shaped member 22
Can be continuously shredded.

By the way, at the stage of performing the final cutting, there is no part where the L-shaped member 22 projects from both clamps 38 and 40 when the L-shaped member 22 is clamped, and the gripping member 28 cannot hold it.

Therefore, as shown in FIG. 10 (f), the moving blade 54
The stopper 66 at a position further below a and 54b is projected, and the L-shaped member 22 is lowered to a position where it abuts on the upper surface of the stopper 66, and then released from the grip member 28. This gives L
The material 22 is supported only by the stopper 66. The height of the stopper 66 is appropriately set by raising and lowering the substrate 61 by driving the ball screw 59.

In this state, as shown in FIG. 10 (g), the L-shaped member 22 is gripped by both clamps 38, 40, and the shearing in the vertical direction by the press cutting blade 48 and the shearing in the lateral direction by the moving blades 54a, 54b are performed. This completes the final division. All of the pieces shredded by the above work are stored in the collection drum 16 and transported to a predetermined storage location.

As described above, according to this method and apparatus, the single shearing device 12 can continuously cut the L-shaped member 22 in the longitudinal direction and the lateral direction. Moreover, since cutting in both directions can be performed by shearing (shear), compared to a configuration using a special cutter such as a roller cutter, wear of each cutter, that is, the push-cutting blade 46 and the movable blades 54a, 54b is small, In addition, the amount of secondary waste generated is extremely small compared to the configuration using various types of fusing.

Further, as shown in this embodiment, if the pressing blade 46 has a tapered shape, the entire blade does not contact the corners at the same time, but they contact in order from the top, thus reducing the shearing force. The load on the pressing blade 46 is reduced. in this case,
The same effect can be obtained even if the shape of the push-cut blade 46 is tapered so that the protruding amount increases as it goes downward.

Further, as shown in the embodiment, if the stopper 66 is arranged below both the clamps 38, 40 and the movable blades 54a, 54b,
By supporting the L-shaped member 22 with this stopper 66, it is possible to shred up to the last piece.

In the embodiment, the L-shaped member 22 is fed downward as the shredding progresses, but in the present invention, the vertical cutter and the vertical cutter are provided in a direction substantially perpendicular to the feeding direction of the channel box regardless of the feeding direction. The horizontal cutter should be pressed against it.

Further, in the present invention, regardless of the kind of the feeding means, for example, a crane having a hanging chain or the weight of the channel box volume reducing piece itself may be used.

Further, in the present invention, regardless of the shape and structure of each cutter, for example, instead of the two movable blades 54a and 54b in the above-mentioned embodiment, a V-shaped plan view as shown in FIGS. 13 (a) and (b) is used. A single moving blade 54c having a shape may be used.

〔The invention's effect〕

As described above, according to the present invention, the operation of vertically shearing the corner portion of the channel box volume-reducing piece having an L-shaped cross section and the operation of separating the two pieces thus divided by the lateral shearing are repeated. Therefore, it is possible to continuously shred the channel box volume reducing piece having an L-shaped cross section with a single device. Therefore, it is not necessary to separately perform the process of cutting in the vertical direction and the process of cutting in the horizontal direction, and the processing efficiency is improved, and the installation space of the device can be significantly reduced. Furthermore, special cutters such as roller cutters and various fusing are not required, and it is possible to shred by shearing, so the cutter is less worn and the number of replacement work can be minimized. At the same time, the generation of secondary waste can be suppressed to an extremely small amount.

[Brief description of drawings]

1 is an overall perspective view of a shearing device in a channel box shredding device according to an embodiment of the present invention, FIG. 2 is an overall perspective view of the shredding device, and FIG. 3 is a perspective view of a movable clamp in the shredding device. Fig. 4 is a perspective view of a fixed clamp and a push-cut blade in the shredder, Fig. 5 is an overall perspective view of a channel box support device in the shredder, and Figs. 6 and 7 are the shredders. A sectional plan view showing a positional relationship between a movable clamp, a fixed clamp, and a push-off blade in the device,
FIG. 8 is a sectional plan view showing the positional relationship between a movable clamp, a fixed clamp and both moving blades in the same shredding device, FIG. 9 is a sectional view taken along line IX-IX of FIG. 8, and FIGS. ) (C)
(D), (e), (f) and (g) are process drawings showing the shredding method by the shredding device, and FIGS. 11 (a), (b) and (c) are L-shaped shreds by the shredding method. Perspective view showing each state of the material, No. 12
Figures (a), (b) and (c) are process drawings showing a conventional volume reduction process of a channel box, Fig. 13 (a) is a plan view showing a moving blade in another embodiment, and Fig. 13 (b) is It is a side view of the movable blade. 12 …… Shearing device, 22 …… L-shaped material, 220 …… Discontinuity, 22
a, 22b ...... Pieces separated from each other, 26 ...... Telescopic device (feeding means), 38 ...... Movable clamp, 40 ...... Fixed clamp, 41
…… Receiving blade (horizontal cutter), 46 …… Pressing blade (vertical cutter), 54a, 54b, 54c… Movable blade (horizontal cutter).

Claims (2)

[Claims] 1. A method of further shredding a channel box volume-reducing piece volume-reduced into a member having an L-shaped cross section, wherein the corner portion of the channel box volume-reducing piece is longitudinally sheared by a predetermined dimension. , The two divided by this shear
Each piece is sheared laterally to separate it from the other part,
A method for shredding a used channel box, characterized in that the longitudinal shearing and the transverse shearing are repeated. 2. A device for further shredding a channel box volume-reducing piece volume-reduced into a member having an L-shaped cross-section, the feed means for feeding the channel box volume-reducing piece in the vertical direction, and the channel box reducing piece. A clamping member for clamping the container and extending in the longitudinal direction of the channel box,
In this channel box volume-reducing piece, a vertical cutter that shears the corner portion of the channel-box volume-reducing piece that is pressed by the clamp member, and a vertical cutter that extends in the lateral direction of the channel box volume-reducing piece and that extends vertically with the clamp member. A horizontal cutter that is provided with the positions shifted in the direction and is pressed against two pieces divided by the vertical cutter while the channel box volume-reducing piece is clamped to separate the two pieces from other parts. A used channel box shredding device characterized by being provided.