JPH0348799A - Method and device for shredding channel box after use - Google Patents

Abstract

PURPOSE:To further shred a channel box reduced piece efficiently by cutting channel box reduced piece corner parts longitudinally and cutting two pieces which are divided by the longitudinal cutting laterally and repeating the cutting alternately. CONSTITUTION:When the channel box reduced piece which are reduced into L-sectioned member 22 are further shredded, the corner parts of channel box reduced piece are sheared longitudinally with a push cutting blade 46 by specific size and two pieces 22b which are divided mutually by the shearing are further sheared laterally with a receiving blade 41 and separated from other parts; and those longitudinal shearing and lateral shearing are repeated. Consequently, L-sectioned channel box reduced pieces are shredded continuously by the single device. Therefore, the process for longitudinal cutting and the process for lateral cutting need not be performed individually and the throughput can be improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a shredding method and apparatus for further shredding a channel box volume-reducing piece that has been volume-reduced into a member having an L-shaped cross section. .

[Conventional technology]

Conventionally, as a means for reducing the volume of a cylindrical used channel 90 having a storage space inside, as shown in FIG. , a method is generally used in which the member 92 is divided into two parts each having a cross-sectional shape as shown in FIG. 53(b).
-187298, JP-A-62-257093, etc.). By stacking the members 92 having an angular cross-section with no gaps between them, they can be stored in a relatively small basket 94 as shown in FIG. 12(C).

Furthermore, as a means for cutting the channel box into pieces, Japanese Patent Application Laid-Open No. 55-26407 discloses that the four corners of the channel box are simultaneously cut in the longitudinal direction with a roller cutter.
A configuration in which each of the divided flat plates is cut in the transverse direction is shown. Also, JP-A-59-1747
No. 92 discloses that a channel box is pressed into a pressed flat plate shape and 17. , followed by cutting in the transverse direction to reduce the volume.

[Problem to be solved by the invention]

Conventionally, when a member having a cross section that has been divided by the method shown in JP-A No. 53-27795 is further cut into pieces, the corners are cut vertically to form two flat plates, and then Measures must be taken such as cutting each slab into pieces. However, such processing requires two independent processes: longitudinal cutting and transverse cutting, which requires a long processing time and requires separate equipment for longitudinal cutting and transverse cutting. This has the disadvantage of requiring a large installation space.

Furthermore, in the shredding method disclosed in JP-A-55-26407, it is necessary to vertically cut four corners at a time, so a special cutting means such as a roller cutter is required. Compared to normal shearing cutters, they wear more and have a shorter lifespan. For this reason, the cutter has to be replaced many times, which is particularly inconvenient in the treatment of channel boxes, which are radioactive waste, from the standpoint of preventing exposure to radiation.

In the method disclosed in Japanese Patent Application Laid-Open No. 59-174792, it is necessary to cut two stacked flat plates at once using a press, so it is difficult to use a shear, and various fusing methods must be used.

This type of fusing generates a large amount of secondary waste such as gas, rubber, dross, and suspended solids compared to the above-mentioned shear, and is therefore unsuitable for the treatment of channel boxes, which are radioactive waste. In addition, the torch (electrode/nozzle) is severely worn out and needs to be replaced many times.

Furthermore, the method and apparatus shown in the latter two publications are
This method is applied to dividing a channel box that has not yet been subjected to volume reduction treatment, and is not suitable for efficiently shredding members that have already been divided into cross-sectional shapes using other general equipment.

In view of these circumstances, it is an object of the present invention to provide a method and apparatus that can efficiently further shred channel box volume reduction pieces that have been previously divided into members having a cross-sectional shape.

[Means to solve the problem]

The present invention is a method for shredding a channel box volume reducing piece having a truncated cross-section, in which the corner portion of the channel box volume reducing piece is sheared in the longitudinal direction by a predetermined dimension, and two pieces are separated from each other by this shearing. Each of the two pieces is sheared in the transverse direction and separated from the other parts, and these shearing in the longitudinal direction and shearing in the transverse direction are repeated (Claim 1).

The present invention also provides an apparatus for carrying out the above method, which includes a feeding means for vertically feeding the channel box volume reducing piece, a clamp member for clamping the channel box volume reducing piece, and a clamping member for clamping the channel box volume reducing piece in the vertical direction. a vertical cutter extending in the channel box volume reducing piece and shearing the corner by being pressed against a corner of a portion of the channel box volume reducing piece clamped by the clamp member; and a horizontal cutter, which is provided at a position shifted in the vertical direction, and presses each of the two pieces separated from each other by the vertical cutter while the channel box volume reduction piece is clamped, thereby separating both pieces from the other parts. (Claim 2).

[For production]

First, according to the method according to claim 1, by alternately repeating longitudinal cutting of one corner of the channel box volume reduction and transverse cutting of two pieces mutually divided by this longitudinal cutting, the cross-sectional The L-shaped channel box volume reduction piece is continuously divided into strips.

Specifically, according to the apparatus according to claim 2, first, a predetermined portion of the channel box volume reduction piece having an angular cross section is clamped by a clamp member, and a vertical cutter is pressed against the corner of this clamped portion. After this corner has been sheared by a predetermined amount, the clamp is released. Then, after the channel box volume reduction piece is fed a predetermined amount in the vertical direction, it is clamped again, and shearing in the vertical direction is performed continuously, and a horizontal cutter is cut in each month divided by the vertical shearing. By being pressed, both pieces are separated from the other parts.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 11.

The channel box shredding device shown in FIG. 2 includes a conveying device 10 and a shearing device 12, and a fragment collecting device 14 is arranged below the conveying device 10 and a shearing device 12.

This debris collection device 14 includes a collection drum 16 and a cart 18.
It is equipped with Further, a basket 20 is installed near this channel shredding device, and inside this basket 20, a member having an L-shaped cross section (hereinafter referred to as an L-shaped member) is formed by dividing a channel box into two in advance by a well-known method. A large number of 22 are stored.

The conveyance device 10 includes a cart 2B that moves in the X direction in the figure with respect to the ground, and a rail 24 extending in the Y direction in the figure is fixed to this cart 23, and is movable along the rail 24. A telescoping device (feeding means) 26 is attached to. This expansion/contraction device 26 is composed of a plurality of cylindrical members with different diameters, and the whole is expandable/contractable in the vertical direction (Z direction), and a gripping member 28 for gripping the upper end of the above-mentioned 7 materials 22 is provided at the lower end. It is being That is, this expansion/contraction device 26 moves in the XY force directions without gripping the L7 material 22, and also moves the L7 material 22 in two directions (
It has the function of sending in the vertical direction.

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

The framework of this shearing device 12 consists of four pillars 30 and an upper horizontal channel member 31-- arranged between these pillars 30.
34, and a lower horizontal channel member 35.

The inner surface of the L section horizontal channel material 3 is equipped with a hydraulic cylinder.
6 is fixed, and a movable clamp (clamp member) 38 as shown in FIG. 3 is fixed to the rod 361 of this hydraulic cylinder 36. This movable clamp 38 has a concave clamp surface 38 that matches the cross-sectional shape of the above-mentioned 7 materials 22.
1, and a groove 382 extending in the vertical direction (vertical direction) is formed in the center thereof.

A fixed clamp (clamp member) 40 as shown in FIGS. 1 and 4 is arranged at a position facing the movable clamp 38. This fixed clamp 40 is fixed to the upper horizontal channel material 32, 33, 34 side via left and right support plates 41.42 (Fig. 1), and clamps the L7 material 22 together with the clamp surface 381 of the movable clamp 38. It has a convex clamping surface 401.

A push-cutting blade mounting base 43 is incorporated into the fixed clamp 40 so as to be movable toward the movable clamp 38.
There is. This push-cutting blade mounting base 43 is fixed to a rod 441 of a hydraulic cylinder 44 fixed to the upper horizontal channel member 33, and the upper part of the push-cutting blade mounting base 43 is provided with a guided guide groove formed on the fixed clamp 40 side. It has a section 421.

A push-cutting blade (vertical cutter) 46 extending in the vertical direction Jj (vertical direction) is removably attached to the tip of the push-cutting blade mounting base 43. This push cutting blade 46 has a chill bar-like blade whose protrusion 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. The movable clamp 38 moves between a position where it is housed in the recess 402 and a position where it protrudes into the groove 382 of the opposing movable clamp 38 as shown in FIG.

On the other hand, in FIG. 1, the upper horizontal channel material 31.
32, and the upper water i'l'j
The majority of the core formed of channel material 31.34 includes:
Channel materials 50a, 50 are installed in diagonal directions 450, respectively.
b is fixed. These mounting channel materials 50a
, 50b are fixed with hydraulic cylinders 52a, 52b, and as shown in FIG. Fixed.

The double-column movable blades 54a and 54b are acute-angled blades sandwiched between a water hole surface 56 and an inclined surface 57, as shown in FIG. On the other hand, a blade (horizontal cutter) 41 is fixed to the fixed clamp 40 at a position corresponding to the moving blades 54a, 54b of both columns, and the hydraulic cylinders 52a, 52
By the operation of b, the movable blades 54a and 54b move between the position on the straight F side of the movable clamp 38 (solid line position in FIG. 9) and the position where the receiver reaches the blade 41. . Furthermore, the moving direction of the two pillar movable blades 54a and 54b is set perpendicular to the clamping surface.

Further, below the hydraulic cylinder 44 is a channel box reducing device 60 such as a six piece support device 60 as shown in FIG.
is installed. This channel box volume reduction column support device 60 is a device for supporting the lower end of the L-shaped material 22 when the L-shaped material 22 is finally shredded as described later. To make the shredding length adjustable,
It consists of the following keys.

The support device 60 has a base 61, and guided cylinders 62 are fixed on both sides of the base 61.
A rod 58 fixed to the osseous side of the shearing device 12 passes through this in the vertical direction.

The base 61 also has a nut member 63 having a screw hole.
is fixed, and a ball screw 59 is screwed into this nut member 63. When this ball screw 59 is rotationally driven by a motor (not shown) or the like, the base 61 moves up and down along the rod 58. It has become.

On this base 6, a hydraulic cylinder 64 and two rods 65 are arranged parallel to the hydraulic cylinder 44, and a stopper 66 is fixed to the rod 641 of the hydraulic cylinder 64. The rod 65 passes through both wings of this stopper 66, and the stopper 66 moves along the rod 65 by the operation of the hydraulic cylinder 64, and this stopper 66 moves below the two pillar moving blades 54a, 54b. It has started to appear.

Next, a method of shredding the L child material 22 using this device will be described with reference to FIGS. 10 and 11 as well.

First, the telescoping device 26 of the conveying device 10 is moved above the basket 20, and the gripping member 28 is used to hold one L child material 22.
, and convey this L child material 22 to above the shearing device 12.

On the other hand, in the shearing device 12, move the movable clamp 38 away from the fixed clamp 40 (two-dot chain line in FIG. Make it stand out. In this state, as shown in FIG. 10(a), the movable blade 54a
, 54b (horizontal surface 56 in FIG. 9). In other words, the double-column moving blade 54
The L child material 22 is positioned in the vertical direction by a and 54b.

Next, the movable clamp 38 is moved to the fixed clamp 40 side, and the lower part of the L-shape +422 is clamped by both clamps 38 and 40 as shown by the solid line in FIG. 6 and FIG. 10(b). In this state, as shown in FIG. 7, by driving the push-cutting blade 46 in the fixed clamp 40 in the direction of protruding into the groove 382, the push-cutting blade 46 cuts the L child material 22.
Shear the corners vertically. As a result, Figure 11 (
As shown in a), a cut 220 is formed at the corner of the lower end of the L child member 22, and the lower end is divided into two pieces 22a and 22b with this cut 220 as a border.

Next, as shown in FIG. 10(C), the movable clamp 38 and both pillar moving blades 54a and 54b are returned to the standby position, and the L child member 22 is further lowered.

This descending dimension is set to be slightly smaller than the dimension of the cut 220, so that the position of the movable blades 54a, 54b is slightly lower than the upper end position of the cut 220. Then, as shown in FIG. 10(d), the L child material 22 is clamped again with both clamps 38 and 40, and the corner portions of the L child material 22 are continuously sheared in the vertical direction with the push cutting blade 46. Then, the movable blade 54b is projected from the solid line position in FIG. 8.9 to the two-dot chain line position. Due to the shearing force between the movable blade 54b and the blade 41, as shown in FIG. be separated. This separated piece 22b is stored in the lower collection drum 16. Similarly, the movable blade 54a is projected as shown in FIG. 10(e), and the remaining piece 22a is separated from the other portions as shown in FIG. 11(e). By repeating the operations shown in FIGS. 10(c) to 10(e) above, shearing is performed in the longitudinal and lateral directions, and the L child material 22 can be continuously shredded.

By the way, at the final cutting stage, when the L child material 22 is clamped, there is no longer a portion of the L child material 22 that protrudes from both clamps 38 and 40, making it impossible to hold it with the grip member 28.

Therefore, as shown in FIG. 10(f), the stoppers 66 located further below the movable blades 54a and 54b are projected, and the L child material 22 is lowered to a position where it abuts against the stoppers 66. After that, it is released from the gripping member 28. As a result, the L child member 22 is supported only by the stopper 66. Note that 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.
The final division is completed by performing vertical shearing by the blades and lateral shearing by the movable blades 54a and 54b. All of the pieces cut into IIJ by the above operations are stored in a collection drum 6 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 child material 22 in the longitudinal and lateral directions. Moreover, since cutting in both directions can be performed by shearing, compared to a configuration using a special cutter such as a roller cutter, each cutter, that is, the push-cutting blade 46 and the movable blades 54a, 54b,
There is less wear and tear, and the amount of secondary waste generated is extremely small compared to configurations that use various types of fusing.

Furthermore, as shown in this embodiment, if the push-cutting blade 46 is made tapered, the shearing force is reduced because the entire plate does not contact the corners at the same time, but contacts the corners sequentially from the top. , the burden on the push-cutting blade 46 is reduced. In this case, the same effect can be obtained even if the shape of the push-cutting blade 46 is made into a tapered shape in which the amount of protrusion increases as it goes downward.

Further, as shown in the same embodiment, both clamps 38.4
If a stopper 66 is placed below the 0 and movable blades 54a and 54b, this stopper 66 will stop the L child material 22.
By supporting it, it is possible to shred down to the last piece.

In the same embodiment, the L child material 22 is fed downward as the shredding progresses, but the present invention does not care about the feeding direction of the channel box, and the vertical cutter and All you have to do is press the horizontal cutter against it.

Further, in the present invention, the type of feeding means is not limited, and for example, a crane having a hanging chain or the dead weight of a channel box volume reduction piece 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 embodiment, a A single letter-shaped movable blade 5X↓C may be used.

〔Effect of the invention〕

As described above, the present invention repeats the work of vertically shearing the corners of the channel box volume reduction piece having a cross-sectional shape, and the work of separating the two pieces thus divided by horizontal shearing. Therefore, it is possible to continuously shred channel box volume reduction pieces having an angular 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, which has the effect of improving processing efficiency and significantly reducing the installation space of the apparatus. Furthermore, it eliminates the need for special cutters such as roller cutters and various types of fusing, making it possible to shred with shear, reducing wear on the cutter.
Not only can the number of replacement operations be minimized, but also the generation of secondary waste can be minimized.

[Brief explanation of drawings]

Fig. 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 same shredding device, and Fig. 3 is a perspective view of a movable clamp in the same shredding device. 4 is a perspective view of the fixed clamp and push-cut blade in the same shredding device, FIG. 5 is an overall perspective view of the channel box support device in the same shredding device, and FIGS. 6 and 7 are the same shredding device. A cross-sectional plan view showing the positional relationship of the movable clamp, fixed clamp, and push-cutting blade in the device,
Fig. 8 is a cross-sectional plan view showing the positional relationship between the movable clamp, fixed clamp, and both pillar movable blades in the same shredding device, Fig. 9 is a cross-sectional view taken along the line IX-IX in Fig. 8, and Fig. 10 (a) ( b) (c)
)(d)(e)(f)(g) are process diagrams showing the shredding method using the above shredding device, and FIGS. 11(a), (b), and (c) show L shredded by the same shredding method. A perspective view showing each state of the character material,
12(a), 12(b), and 12(e) are process diagrams showing the volume reduction process of a conventional channel box, FIG. 13(a) is a plan view showing a movable blade in another embodiment, and FIG. ) is a side view of the movable blade. 12... Shearing device, 22... L-shaped material, 220...
- Cuts, 22a, 22b... mutually divided pieces,
26... Telescopic device (feeding means), 38- Movable clamp, 40... Fixed clamp, 4]... Receiving blade (horizontal cutter), 46-... Push cutting blade (vertical cutter), 54a, 5
4b, 54c...Moving blade (horizontal cutter).

Claims (1)

[Claims] 1. A method for further shredding a channel box volume reducing piece that has been volume reduced into a member having an L-shaped cross section, the corner portions of the channel box volume reducing piece being cut vertically by a predetermined dimension. The used product is characterized in that the two pieces separated from each other by this shearing are each sheared horizontally and separated from the other parts, and these vertical shearing and horizontal shearing are repeated. How to shred a channel box. 2. A device for further shredding a channel box volume reducing piece that has been subjected to a volume reduction process into a member having an L-shaped cross section, comprising a feeding means for vertically feeding the channel box volume reducing piece; a clamping member for clamping, a vertical cutter extending in the longitudinal direction of the channel box and shearing the corner of the portion of the channel box volume reduction piece clamped by the clamping member by being pressed against the corner; It extends in the horizontal direction of the box volume reducing piece and is provided to be shifted in position from the clamp member in the vertical direction, and is pressed against the two pieces separated from each other by the vertical cutter while the channel box volume reducing piece is clamped. A used channel box shredding device characterized by comprising: a horizontal cutter for separating both pieces from other parts.