JPS59226900A - Device for opening or closing clamping band 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 a tightening band for attaching a drum lid.

Facilities that handle radioactive materials such as nuclear power plants generate large amounts of radioactive waste such as combustible miscellaneous waste made of cloth, plastics, etc. and waste resin.\These wastes and their incinerated ash are Drums are widely used for storage. This drum can is constructed by fitting an inner lid into the opening at the upper end as necessary, and then covering it with an outer lid (simply referred to as the lid in this invention). A structure is used in which the lid is held in a sealed state by a tightening band that surrounds the curled portion of the body and tightens both ends of the band with bolts or levers. When storing the waste, etc. in this drum or taking out the waste, etc. from the drum for incineration or solidification, it is necessary to open and close the lid by fully operating the tightening band mentioned above. However, since there was no suitable device to open and close this lid, the operator had to rely on human hands and was forced to do work that exposed him to harmful radiation.This invention was made in consideration of the above points.1 It is an object of the present invention to provide a tightening band opening/closing device that can open and close a bolt-type tightening band without manual intervention.

However, the gist of the present invention is to provide a pair of end plates, a connecting rod whose both ends are supported by the end plates, and a drum can that is guided by the connecting rod so that the connecting rod can reciprocate in the longitudinal direction. a pair of opening claws each having a claw piece that engages between the lid mounting band fasteners; and one of the opening claws rotatably supported on the end plate in parallel with the connecting rod. a threaded rod having a right-hand thread that is inserted and screwed together, a left-hand thread that is connected to the right-hand threaded portion and that is inserted and screwed into the other opening claw; a drive device for driving the rotation of the screw thread; and a drive device for rotating the bolt. a nut runner, which is provided with a socket and a drive machine for rotating the socket, and is reciprocably supported in the longitudinal direction of the connecting rod;
a reciprocating drive machine that reciprocates the nut runner; a synchronizer that synchronously rotates the rotation shaft of the nut runner and the threaded rod when the nut runner rotates in the tightening direction; There is a drum can tightening band opening/closing device G comprising an end plate driving device for supporting and driving the end plate so as to engage and disengage the drum can.

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 fixed on a foundation 1, and a turntable 3 is provided below the pedestal 2. A rail 4 and a rail 5 are laid on the foundation 1 and above the turntable 3, respectively, and a cart 7 carrying a drum can 6 runs on these rails 4 and 5. The lid 8 of the drum can 6G is attached with a bolt-type tightening band 9.

This tightening band 9 is an elastic metal band 1 having a V-shaped cross section.
Tighten II Ia, l lb on both ends of 0 (#l attachment 1
1 is fixed, and a bolt 13 is screwed into a nut 12 fixed to one fastener 11b from the other fastener 11a side. At a position on the pedestal 2 at approximately the same height as the upper end of the drum can 6, there is a tightening tool 11 that tightens when the drum can 6 is rotated by the turntable 3.
A fastener position detector 15 with a lever 14 that is pressed by the force is attached. Also, drum can 6 on stand 2
J position [This is where the drum centering and fixing device 2o is installed. As shown in the second figure, levers 22.23 equipped with a tip roller 21 are pivotally connected to the pillars of the pedestal 2, and both levers 22.23 are interlocked by a sector gear 24.25 to air the air. There are two sets of left and right devices that are driven to open and close by cylinders 26. On the other hand, above the turntable 3), the upper part of the pedestal 2 is broken down, and a substantially disc-shaped support plate 3
o is attached so that it can be raised and lowered freely. The support plate 30 and the protruding rod 31 are guided so as to be able to move up and down by a guide sleeve 32G attached to the pedestal 2, and the support plate 30 is driven up and down by an elevating drive device 33 such as an air cylinder attached to the pedestal 2. It looks like this. On the lower surface of this support plate 30, as shown in the fourth figure, a ring-shaped press plate 34 is fixedly installed, and a plurality of rollers each having a 7-shaped groove are mounted on the bottom surface of the support plate 30.
The kund holder 35 is arranged and pivoted concentrically with the drum 6. Further, as shown in FIG. 6, the support plate 30 has a plurality of electromagnets 36 that pass through the press plate 34 and are movable up and down by a small amount.
is installed vertically.

Roughly, at the front end of the support plate 30, a band opening/closing device 40 according to the present invention for opening and closing the tightening tool 11 of the tightening band 9 is attached, as shown in FIGS. 5 to 9 below. Its structure will be explained.Brackets 41 and 41i fixed to the support plate 30 rotatably support a shaft 42, and this shaft 42 is adapted to be driven to swing by a swing motor 43. The bases of a pair of end plates 44, 44 are fixed to the bases 9 near both ends of the shaft 42.
It consists of an arm 45 fixed to 2 and a lever 46 pivotally connected to this arm. Both ends of a round rod-shaped connecting rod 47 pass through the pivot joint between the arm 45 and the lever 46, the base of the lever 46 is fixed to the connecting rod 47, and the arm 45 is rotatable around the connecting rod 47. I support this. In addition, lever 4
The arm 45 is elastically supported by an internal spring 49 on a stopper plate 4g fixed to the arm 45, and is connected to the arm 45 so that it can swing slightly. Further, a threaded rod 52 having a right-hand thread 50 and a left-hand thread 5 connected thereto is rotatably attached to the lever 46, 46 in parallel with the connecting rod 47. A pair of opening claws 53.5 are inserted and screwed into the right-hand thread 50 and left-hand thread 51 of the threaded rod 52, respectively.
4 is guided by a connecting rod 47 in a reciprocating manner in the longitudinal direction of the connecting rod 47. At the side end portions of these opening claws 53 and 54, claw piece portions 55 that engage between the band fasteners 11a and Ilb are formed. A box-shaped moving body 56 is supported by the unthreaded straight rod portion of the screw 52 and the connecting rod 47 so as to be able to reciprocate in the longitudinal direction of the connecting rod 47. Socket 5 for head rotation
7 and an air motor 58 for rotating the socket 57 is attached. The socket 57 is connected to one end of a universal joint 61 provided within an intermediate shaft 60 rotatably supported by the moving body 56.
In addition, the end face of the IM shaft 60 to which the other end of the universal joint 61 is connected and the side end of the gear 62 to which the output shaft of the air motor 58 is fixed [here, the protrusion 63
and 64 are fixed to each other at a predetermined angle (for example, 24
An impact cam 65 that can rotate freely (0 degree) is formed. On the other hand, a cylinder 66 is provided through which the contact body 56 & moss connecting rod 47 passes, and the piston 6 is fixed to the connecting rod 47.
7 is fitted into the inner surface of this cylinder 66 to form an air cylinder 6g for driving the nut runner 59 back and forth. Further, a gear 69 that meshes with the gear 62 is fixed to the outer ring of a one-way roller and a chia 0 that can be moved in the longitudinal direction of the threaded rod 52 within the movable body 56 . The inner ring is connected to the threaded rod 52 via a sliding key 71. Further, the screw barrel 52 is 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 in FIG. The cart 7 on which is placed is stopped at the center of the turntable 3, the turntable 3 is driven at low speed, and the turntable 3 is stopped when the fastener position detector 15 is activated by being pressed by the fasteners 11a and 11bc. The turntable 3 is then rotated in the opposite direction, and when only one of the fasteners Ila or Ilb is detected, the turntable 3 is stopped. Stop in front. Next, each lever 22, 23 of the drum centering fixing device 20
By driving in the closing direction, the drum 6 is centered and fixed concentrically with the support plate 30 as shown by the solid line in FIG. Next, the support plate 30 is lowered by the lifting drive device 33, and the lid 8 is pressed downward by the pressing plate 34. As a result, even if the inside of the drum 6 is pressurized by 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, put on the band opening/closing device 40.
3 to move the arm 45, which was in the inclined state shown by the dashed line in FIG. Each claw portion 55 is tightened by a tightening tool 11a.

engage between Ilb and Ilb. 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 and 54 are automatically aligned by swinging vertically together with the reno-ku-46, and the bolt 13 is reliably aligned. The claw portion 55 engages with the bolt I3 between the fasteners 11a' and Ilb. Next, the air motor 72 is driven in the clockwise direction to rotate the threaded rod 52, thereby separating the opening claws 53 and 54 screwed into the right-hand thread 50 and the left-hand thread 51 from each other, and separating the opening claws 53 and 54 from each other. 0 order' to eliminate the gap between each side of the fastener 1]
The moving body 56 is supplied with compressed air from the air cylinder 68 &
While moving the nut runner 59 in the direction toward the bolt 13, the socket 57 is moved by the air motor 5F3.
Rotate counterclockwise to attach the socket 57 to 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 time, Tranna 5
The air motor 58 of No. 9 is rotated clockwise by 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 13 is loosened due to the impact action, and the tightening tool 11 is generated due to this loosening.
The clearance between a, llb 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 the same amount left and right, the tightening band 9 spreads symmetrically left and right, and engages with the band retention amount 35 to restrict its position in a ring shape, so the opening claws 53 and 54 is pushed by the bolt 13 and the end plate 44 is tilted in a direction G away from the drum can 6. If the lifting drive device 33 & support plate 30 are raised in this state, the lid 8 will be suspended from the electromagnet 36, and the expanded tightening band 9 will be held by the band holder 35 and connected to the curled body portion of the drum 6. It rises without interference, and the drum 6 becomes open. Then, the drum can centering and fixing device 20 is opened, the turntable 3 is rotated in the direction of rail straight movement, the cart 7 is moved to the outside of the pedestal 2, and the contents of the drum can are taken out or loaded by a next process device (not shown). Perform operations such as turning on.

Next, in order to attach the drum can 6 and lid 8 that have been returned to the cart 7 on the turntable 3 after the above operation, use the drum can centering fixing device @20. Then, the support plate 30 holding the tightening band 9 is lowered, and the air motor 58 of the nut runner 59 is rotated clockwise with the lid 8 in pressure contact with the drum can 6. Then, the screw 52 first passes through the gears 62 and 69 and the one-way clutch 70.
rotates a small amount and the opening claws 53, 54 and tightening glla, Il
A small amount of clearance is formed between b, and then the socket 57 starts to rotate clockwise with the play of the impact cam 65, and thereafter the screw barrel 52 and the socket 57 rotate synchronously. As a result, the bolt 13 is tightened into the nut I2, and the gap between the opening claws 53 and 54 narrows in advance of this, and the bolt 13 is tightened smoothly without locking.

By regulating the positions of the fasteners 11a and Ilb by the opening claws 53 and 54, the fastening band 9 is symmetrically reduced in diameter and smoothly engaged with the outer circumference of the lid 8 and the curled body portion of the upper end of the drum 6. Then, the lid 8 is attached using the tightening band 9. After that, the nut runner 59 is moved backward by the air cylinder 68, and the air motor 5g is rotated clockwise to release the opening claw 5.
3. Reduce the interval of 54 to create a gap between the fasteners 11a and Ilb, tilt the end plate 44 to the position indicated by the chain line in FIG. 13, the electromagnet 36 is turned off, the support plate 30 is raised, and the drum centering and fixing device 20 is opened, thereby completing the attachment of the lid 8.

As described above, the band opening/closing device 4
This can be done without manual intervention, especially with the tightening tool 11a.
and llb are driven equally to the left and right, so the tightening band 9 is deformed symmetrically, and the tightening band 9 can be opened and closed smoothly and reliably in a stable state.

The present invention is not limited to the above-mentioned embodiments. For example, the end plate 44 may be horizontally driven back and forth instead of being swung to lock the claw portions 55 of the opening claws 53, 54 into the fasteners 11a, Il.
The arm 45 and the lever 46 may be engaged and disengaged from each other during the period b, or, if the tightening band 9 is manufactured with good precision, the arm 45 and the lever 46 may be fixed to each other and integrated. Further, in the above embodiment, the nut runner 59 is guided by the connecting rod 47 and the threaded rod 52 for guiding the opening claws 53, 54, and the nut runner 59 is reciprocated using the piston 67 fixed to the connecting rod 47. As a result, the nut runner 59 has the advantage of being compact and lightweight as a whole, but the nut runner 59 may be guided by a separate guide means and reciprocated by a separate air cylinder or the like. In cases where the rotating shaft of the nut runner 59 and the threaded rod 52 are directly driven by an electric motor, it is also possible to synchronously rotate them using an electrical synchronizer.

Further, the device of the present invention is a drum lid opening/closing device of the type in which the drum can is raised and lowered without raising and lowering the band opening/closing device, and the tightening band is opened and closed by the band opening/closing device attached to a support plate or the like fixed to the base. It can also be applied to

As explained above, according to the present invention, it is possible to smoothly and reliably open and close the tightening band, which is the most troublesome task in opening and closing the lid of a drum can using a bolt-type tightening band, without relying on human hands, thereby reducing the risk of danger. This makes it possible to safely open and close the lids of drums that contain large amounts of radioactive waste and other hazardous materials, making it a great contribution to industry.

[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. 6 is a vertical sectional view of the upper part of the device shown in Fig. 1; Fig. 4 is a view taken along the arrow B-E in Fig. 6; Fig. 5 is an enlarged front view of the band opening/closing device in Fig. 1; The side view taken along arrow C-C in Fig. 5, and Fig. 7 are the same (sectional view taken along the line D7D, and the sectional view taken along the line F-F are the same as shown in Fig. 8. 09...Tightening band, 13...Bolt, 40...
・Band opening/closing device, 42... Shaft, 43... Rocking motor, 44... End plate, 47... Connecting rod, 50... Right-hand thread, 51... Left-hand thread, 52...・Screw salary, 53...
・Release claw, 54...Release claw, 55...Claw piece portion, 56
...Mobile storage, 57...Socket, 5F3...Air motor, 59...Nut runner, 62...Tooth 3F,
, 66... cylinder, 67... piston, 68...
・Air cylinder, 69...Gear, 70...One-way clutch, 72...Air motor. Applicant: Masao Inui, agent of Nippon Insulator Co., Ltd.

Claims (1)

[Scope of Claims] A pair of end plates, a connecting rod having both ends supported by the end plates, and a connecting rod reciprocable in the longitudinal direction by the connecting rod.
A pair of opening pawls each having a pawl piece that engages between the band fasteners for attaching the lid of a drum, which are guided by the end plate; a screw barrel having a right-handed screw that is inserted into and screwed into the opening claw, and a left-handed screw that is connected to the right-handed threaded portion and inserted into and screwed into the other opening claw, and a drive device for driving the rotation of the threaded rod; a nut runner that is provided with a socket for rotating the bolt and a drive machine for rotating the socket and is supported reciprocally in the longitudinal direction of the connecting rod; a reciprocating drive machine that makes the nut runner reciprocate; and a reciprocating drive machine that rotates the nut runner in the tightening direction. a synchronizing device that simultaneously rotates the rotating shaft of the nut runner and the threaded rod; and an end plate drive that supports and drives the end plate so that the claw piece of the opening claw engages and disengages between the band fastener. A drum can tightening band opening/closing device comprising a device. 2 The nut runner can reciprocate freely using the connecting rod and threaded rod.
A drum can tightening band opening/closing device according to claim 1, which is attached to a moving body guided by the drum can. 3. The reciprocating drive machine for reciprocating the nut runner is a flow chamber pressure cylinder composed of a piston fixed to a connecting rod and a cylinder provided on a moving body and accommodating the piston. Drum tightening band opening/closing device. 4 A synchronizing device for synchronously rotating the rotation shaft of the nut runner and the threaded rod includes a gear attached to the rotation shaft of the nut runner, a gear meshed with the gear and attached to the threaded rod so as to be movable in the longitudinal direction, and a gear attached to the threaded rod so as to be movable in the longitudinal direction. The drum can tightening band opening/closing device according to claim 1, 2, or 6, comprising a one-way clutch provided between one side and the rotating shaft or the screw salvage.