JPS59226899A - Device for opening or closing cover for drum can - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for opening and closing the lid of a drum can.

Facilities that handle radioactive materials such as nuclear power plants generate large amounts of flammable miscellaneous solid waste such as cloth, paper, and plastics, as well as radioactive waste such as waste resin, and storage of these wastes and their incinerated ash is necessary. Drums are widely used. This drum can is constructed by fitting an inner lid into the opening at the upper end as necessary, then covering the outer lid (simply referred to as a lid in this invention), and connecting the lid and drum with an elastic metal band having a V-shaped cross section. A type of drum is used in which the lid is held in a sealed state by a tightening band that surrounds the body curl part at the upper end and tightens both ends of the band with bolts or levers. When removing waste from a drum for storage, incineration, solidification, etc., it is necessary to open and close the lid by operating the above-mentioned tightening band. There was no proper equipment to open and close the doors, so workers had to rely on humans to do the work, which exposed them to harmful radiation.

This invention solves the above-mentioned conventional problems, and aims to provide a drum lid opening/closing device that can open and close the drum lid without manual intervention.

However, the gist of the present invention is to provide a turntable for rotating a drum around a vertical axis, and a tightening device for detecting the rotating position of a tightening tool of a tightening band for attaching a drum lid on the turntable. a drum centering and fixing device for centering and fixing the drum on the turntable; a support plate mounted on a pedestal that can be raised and lowered above the turntable; a lifting drive device; a pressing tool attached to the support plate for pressing the lid of the drum from above; a band opening/closing device attached to the support plate for opening and closing the tightening band; A band holder is provided concentrically and engages with the outer periphery of the tightening band, and an electromagnet is attached to the support plate so as to be movable up and down and whose end face faces the lid of the drum can. The feature lies in the drum lid opening/closing device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

As shown in the first figure, a pedestal 2 is fixedly installed on a foundation 1, and a turntable 3 is provided below this pedestal 2. A rail 4 is laid on the foundation 1, and a rail 5 is laid on the turntable 3, and a cart 7 carrying a drum can 6 runs on these rails 4.5. A lid 8 is attached to the drum can 6 with a bolt-type tightening band 9.

This tightening band 9 has fasteners 11a and ll'b (generally referred to as fasteners 11) fixed to both ends of a band 10 (made of elastic metal) having a V-shaped cross section, and one fastener 11b. The bolt 1B is tightened by screwing it into the nut 12 fixed to the bolt 12 from the other fastener 11a side. A fastener position detector 1 includes a lever 14 that is pressed by a fastener 11 when the drum 6 is rotated by the turntable 3, at a position on the pedestal 2 at approximately the same height as the upper end of the drum 6.
5 is installation. Further, a drum centering and fixing device 20 is provided at a position on the side of the drum 6 on the pedestal 2. As shown in the second figure, levers 22.23 equipped with a tipped roller 21 are pivotally attached to the pillars of the pedestal 2, and both levers 22.23 are interlocked by a sector gear 24.25 to air the air. A device that is driven to open and close by a cylinder 26,
There are two sets on the left and right. On the other hand, a substantially disk-shaped support plate 30 is attached to the upper part of the pedestal 2 above the turntable 3 so as to be movable up and down. The rond 31 protruding from the support plate 30 is connected to the pedestal 2
'IIT''a a by the guide sleeve 32 attached to
t: i n″J0・”f'c! il; 2 E
]lゞ40.

Supported by a lifting drive device 33 such as an air cylinder
□The plate 30 is driven up and down. A ring-shaped pressing plate 34 is fixed to the lower surface of the support plate 30 as shown in FIG. The arrangement is pivoted. The support plate 30 is still attached as shown in the third figure.
A plurality of electromagnets 36 are vertically provided through the press plate 34 and are movable up and down by a small amount.

The tightening band 9 is attached to the front end of the support plate 30.
A band opening/closing device 40 for opening and closing the fastener 11 is attached, and its structure will be explained below with reference to FIGS. 5 to 9. A shaft 42 is rotatably supported by brackets 41 and 41 fixed to the support plate 30, and this shaft 42 is driven to swing by a swing motor 43. The bases of a pair of end plates 44, 44 are fixed near both ends of this shaft 42. The end plate 44 consists of an arm 45 fixed to the shaft 42 and a lever 46 pivotally connected to the arm 45. Both ends of the round rod-shaped connecting rod 47 connect to the arm 45 and the lever 46.
The base of the lever 46 is connected to the connecting rod 4.
7, and the arm 45 rotatably supports this connecting rod 47.

Note that the lever 46 is a stopper plate 48 fixed to the arm 45.
It is elastically supported by a spring 49 built into the arm 45, and is connected to the arm 45 so as to be able to swing freely. Also lever 46.46
A threaded rod 52 having a right-hand thread 50 and a left-hand thread 51 connected thereto is rotatably attached parallel to the connecting rod 47 .

A pair of opening pawls 53 and 54 inserted into and screwed into the right-hand thread 50 and the left-hand thread 51 of the threaded rod 52, respectively, are connected to the connecting rod 4.
7, the connecting rod 47 is reciprocably guided in the longitudinal direction of the connecting rod 47. A claw piece portion 55 that engages between the band fasteners 11611b is formed at the side end portions of these opening claws 53 and 54. In addition, a box-shaped moving body 56 is supported by the unthreaded straight rod portion of the threaded rod 52 and the connecting rod 47 so as to be reciprocatable in the longitudinal direction of the connecting rod 47.
A nut runner 59 equipped with a socket 57 for rotating the head of the bolt 13 and an air motor 58 for rotating the socket 57 is attached to the nut runner 59. The socket 57 is connected to one end of a universal joint 61 provided in an intermediate shaft 60 rotatably supported by the movable body 56, and the other end of the universal joint 61 is connected to the intermediate shaft 60.
A gear 62 fixed to the end face of the air motor 58 and the output shaft of the air motor 58
An impact cam 65 is formed on the side end surface of the impact cam 65 by fixing protrusions 63 and 64, respectively, and allowing mutual free rotation at a predetermined angle (for example, 240 degrees). On the other hand, the moving body 56
A cylinder 66 through which the connecting rod 47 passes is provided, and a piston 67 fixed to the connecting rod 47 fits into the inner surface of this cylinder 66 to form an air cylinder 68 for driving the nut runner 59 back and forth. Further, a gear 69 that meshes with the gear 62 is fixed to an outer ring of a one-way clutch 70 that is movable in the longitudinal direction of the threaded rod 52 within the movable body 56,
The inner ring of the one-way clutch 70 is connected to the threaded rod 52 via a sliding key 71. The threaded rod 52 is still connected to the output shaft of an air motor 72 having a smaller torque than the air motor 58.

In order to open the lid of a drum in the drum can lid opening/closing device 75 having the above structure, the drum can centering and fixing device 20 is placed in the open state as shown by the chain line in FIG. The cart 7 on which the is stopped, then the turntable 3 is rotated in the opposite direction, and when only the -' side of the fastener 11a or
0 degrees) and stop with the fastener 11 facing forward.

Next, the levers 22 and 23 of the drum centering and fixing device 20 are driven in the closing direction to center and fix the drum 6 concentrically with the support plate 30, as shown by solid lines in FIG. Next, the support plate 30 is lowered 4 by the lifting drive device 33, and the press plate 3
4 to press the lid 8 downward. As a result, drum 6
Even if the inside is pressurized due to gas generated by the contents, the lid 8 will not fly up when the lid is opened. Next, the electromagnet 36 is energized to attract the lid 8.

Next, in the band opening/closing device 40, first the swing motor 43
to move the arm 45, which was in the inclined state shown by the chain line in FIG. The portion 55 is engaged between the fasteners 11a111b. At this time, even if the position of the bolt 13 is slightly shifted vertically due to variations in the height dimensions of the drum can 6, the opening claws 53, 54 are self-aligned by swinging up and down together with the lever 46, and the claw pieces are securely aligned. 55 engages with the bolt 13 between the fasteners 11a and 11. Next, the air motor 72 is driven in the clockwise rotation direction to rotate the threaded rod 52, and the opening claw is screwed into the right-hand screw 50 and the left-hand screw 51. 53 and 54 from each other, each claw piece 5
5 and each side of the fastener 11. Next, compressed air is supplied to the air cylinder 68 to move the movable body 56, and while the nut runner 59 is advanced in the direction toward the bolt 13, the air motor 58 is used to move the socket 56.
7 to the left to break the socket 57 onto the head of the bolt 13. At this time, the one-way clutch 70 is in a free state and the threaded rod 52 is maintained in a stopped state. Next, Natsutranna 59
The air motor 58 is rotated clockwise one rotation to form an impact play in the impact cam 65 portion.

Next, when the air motor 58 is rotated to the left and the air motor 72 is rotated to the right, the bolt 1 is
3 is loosened, and the tightening tool 11a that occurs due to this loosening
1111) and the opening claws 53.54 is reduced to zero by driving the opening claws 53.54 in the opening direction by the air motor 72. Since the opening claws 53 and 54 move by an equal amount left and right, the tightening band 9 spreads symmetrically in the left and right directions, and is held in place by the band holder 35 to restrict its position in a ring shape. The end plate 4 is pushed by the bolt 13
4 is inclined in a direction away from the drum 6. If the support plate 30 is raised by the lifting drive device 33 in this state,
The lid 8 is suspended by an electromagnet 36, and the expanded tightening band 9 is held by a band holder 35 and rises without interfering with the curled body portion of the drum can 6, so that the drum can 6 is in an open state. Then, the drum can centering and fixing device 2o is opened, the turntable 3 is rotated in the straight direction of the rail, the trolley 7 is moved to the outside of the pedestal 2, and the next process device (not shown) is used to transfer the contents of the drum can to a slope or to place the drum can contents on a slope. Perform operations such as turning on.

Next, in order to attach the lid 8 to the drum 6 that has been returned to the turntable 3 together with the cart 7 after the above operation, the drum 6 is centered and fixed by the drum can centering and fixing device 2o, and then the lid 8 and the tightening band 9 are attached. Lower the support plate 30 holding the
With the lid 8 in pressure contact with the drum 6, the nut runner 59
Rotate the air motor 58 clockwise. Then, first gear 62
．． 69° The threaded rod 52 rotates a small amount via the one-way clutch 70 and tightens the opening claw 53.54.
A small amount of clearance is formed between 11 and 11b, and then impact rotation occurs. As a result, the bolt 13 is tightened into the nut 12, and the gap between the opening claws 53 and 54 becomes narrower (the bolt 13 is tightened smoothly without locking). 54 tightens the fastener 11a
By restricting the position of the tightening band 9
is symmetrically reduced in diameter and smoothly fitted to the outer periphery of the lid 8 and the curled portion of the upper end of the drum 6, and the lid 8 is attached by the tightening band 9. After that, the nut runner 59 is moved backward by the air 4 cylinder 68, and then the air motor 58 is rotated clockwise to reduce the gap between the opening claws 53 and 54 to create a gap between the fasteners 11a and llb, and the swing motor 43
By tilting the end plate 44 to the position indicated by the chain line in FIG.
After cutting off the power to the drum 6, the support plate 30 is raised and the drum centering/fixing device 20 is opened, thereby completing the attachment of the lid 8.

As described above, the attachment and detachment of the lid 8 to the drum can 6 can be reliably performed by remote control or automatic operation without manual intervention.

The above describes the case where this invention is applied to a drum can lid opening/closing device using a bolt-type tightening band, but this invention can also be applied to a drum can lid opening/closing device using a lever set tightening band. Examples of this are shown in Figures 10 and 11.
As shown in the figure.

In these figures, the same or corresponding parts as in FIGS. 1 to 9 are given the same reference numerals. The tightening band 80 connects levers 81 and 82 which are pivotally connected to each other with tightening tools saa and sab.
The tip of the lever 81 in the tightened state is engaged with a latch 85 fixed to the band 84. The band opening/closing device 86 for this tightening pan and do 80 is as follows:
The shaft of a swing motor 87 attached to the support plate 30 is freely swingable by a thin air cylinder 91 that is supported at the middle part. The middle part of a small arm 94 equipped with a hook 93 is pivotally attached to the tip of the moving plate 89, and this small arm 94 is attached to the hook 93.
It is biased by a spring t in the downward direction. A cam 95 is fixed to the upper surface of the holding plate 90 and engages with a stopper (not shown) provided on the support plate 30 in order to prevent the arm 88 from bending upward when the near cylinder 91 is operated.

In order to open the tightening band 80 using this band opening/closing device 86, the arm 88 is fixed to the support plate 30 by rotating in the direction of the arrow X while the support plate 30 is lowered as in the previous embodiment. The roller 96 of the small arm 94 is controlled by a cam (not shown).
While pushing the hook 93 upward, rotate the arm 88 in the direction of the arrow X to remove the lifting claw 92 and the small arm 9.
With the lever 81 inserted between 4 and 4, move the lever 81 in the direction of arrow 9.
7 directions, then move the rocking plate 8 using the air cylinder 91.
9 is pushed down and the lever 81 is moved by the lower surface of the swing plate 89.
by pushing in the direction of arrow 98, then rotating arm 88 in the opposite direction to arrow The lever 81 then moves as indicated by arrow 99 and is disengaged from the latch 85. Further arms 88 below
In order to avoid interference between the lever 81 and the upwardly protruding edge of the lid 8 and the band 84, the lower surface of the lever 81 is slid into contact with the upper surface of a cam (not shown) fixed on the suppression plate 34. If the arm 88 rotates the lever 81 to the fully open position while guiding the tip of the lever 81 upward,
The number of times of tightening band 8 degrees is completed. At this time, #188 is bent at the intermediate portion according to the vertical movement of the lever 81.

Tightening of the tightening band 80 is performed by an operation opposite to that described above.

By combining the above-mentioned band opening/closing device 86 with an electromagnet 36 attached to the support plate 3o so as to be movable up and down by an air cylinder 100, a band holder 35, a turntable similar to the above embodiment, a drum can centering fixing device, etc. , the lid of a drum can, which has a lever set with a tightening band of 8 degrees, can be opened and closed without having to obtain it as in the previous embodiment.

The present invention is not limited to the embodiments described above; for example, instead of being directly provided on the foundation 1, the turntable 3 may be provided on the trolley 7 or may be placed thereon. Furthermore, the band opening/closing device 40.86, the drum centering and fixing device 20, etc. may have a configuration other than the above.

As explained above, according to the present invention, the lids of drums can be opened and closed without manual intervention, and the lids of drums containing highly dangerous radioactive waste and other hazardous substances can be opened and closed safely. An extremely useful device is obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a drum lid opening/closing device showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1,
Fig. 3 is a vertical sectional view of the upper part of the device shown in Fig. 1, Fig. 4 is a view taken along arrow B-B in Fig. 3, Fig. 5 is an enlarged front view of the band opening/closing device in Fig. 1, and Fig. 6 is A side view taken along arrow C-C in Fig. 5, Fig. 7 a cross-sectional view taken along the line <: D-D, Fig. 8 a cross-sectional view taken along the line E-E, and Fig. 9 a cross-sectional view taken along the line F-F. ,
FIG. 10 is an upper front view of a drum lid opening/closing device showing another embodiment of the present invention, and FIG. 11 is a perspective view of the main parts of the band opening/closing device. 2... Frame, 3... Turntable, 6... Drum, 8... Lid, 9... Tightening band, 1la111
b... Fastener, 13... Bolt, 15... Fastener position detector, 20... Drum can centering fixing device, 3o.
...Support plate, 33...Elevating drive device, 34...Press plate, 35...Band holder, 36...Electromagnet, 4o
...Band opening/closing device, 53...Opening claw, 54...
Opening claw, 59...Natsutrunna, 72...Airmo~
75... Drum can lid opening/closing device, 80... Tightening hand, 81... Lever, 86... Band opening/closing device,
87... Swing motor, 88... Arm, 92... Lifting claw, 93... Hooking claw. Applicant Nippon Insulator Co., Ltd. Agent Masao Inui 3rd Minister, 4th

Claims (1)

[Claims] 1. A turntable for rotating a drum around a vertical axis, and a fastener position detector for detecting the rotational position of a fastener on a tightening band for attaching a drum lid on the turntable. a drum centering and fixing device for centering and fixing the drum on the turntable; a support plate attached to a pedestal above the turntable so as to be able to rise and fall freely; an elevating device for the support plate; a pressing tool attached to the support plate to press the lid of the drum from above; a band opening/closing device attached to the support plate to open and close the tightening band; A drum surface lid opening/closing device comprising: a band holder that engages with the outer periphery of the tightening band; and an electromagnet that is vertically movably attached to the support plate and whose end face faces the drum lid. Device. 2. Claim No. 2, wherein the band opening/closing device is a band opening device for a bolt-type tightening band, comprising a nut runner for rotating the bolt of the bolt-type tightening band and an opening claw for opening the fastener. The drum lid opening/closing device according to item 1. 3. The drum can lid opening/closing device according to claim 1, wherein the band opening/closing device is a band opening/closing device for a lever set tightening band having an arm for gripping and rotating the lever of the lever set tightening band.