JPH07285592A - Automatic bottom cover opening/closing mechanism in storage container - Google Patents

Abstract

PURPOSE:To obtain an automatic bottom cover opening/closing mechanism of a chip storage container capable of efficiently transferring a large quantity of chips contained therein into a transport container at a time without a possibility of missing. CONSTITUTION:A hang-down bracket 34 integrally formed on the outer surface of a bottom cover of a chip storage container 10 is hinged to the chip storage container 10 in the vicinity of the bottom edge thereof through a shaft pin 38. A rotating roller 56 engaged with a trigger projection 57 on the inner surface of a transport container is provided in relation to the hang-down bracket. The rotating roller is pressed by a spring so as to be projected outward to a certain extent from the side part of the storage container. A latch hook 60 is pivotally mounted on the side part of the chip storage container so as to be pressed inward by a spring in a normal state. The latch hook comprises a hooking part 62 releasably hooking a part of the peripheral edge of the bottom cover of the chip storage container at the bottom cover hooking/closing position thereof and a shoulder part 64 making the latch hook pivot outward against the pressing force of the spring by engaging with a trigger projection 44 provided on the inner surface of the transport container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a waste piece storage container used for temporarily storing a large amount of waste pieces or small disposable parts and transferring the waste pieces into a transfer container when they are full. The present invention relates to a bottom lid automatic opening / closing mechanism for a hanging-type waste piece storage container used together with a transfer container.

[0002]

2. Description of the Related Art In a nuclear power plant, a plurality of fuel assemblies that have been irradiated with radiation are pulled out from a core and a visual inspection is periodically performed. In boiling water reactors, the irradiation fuel assembly was placed on the underwater fuel inspection table, and the bolts that fastened the channel box to the fuel body were placed above the spent fuel pool during inspection. Remove it from the stand using a long and narrow bolt wrench, then lift the channel box upwards to remove it from the fuel body main body. After inspection, reattach the channel box and fix it firmly to the fuel body main body with a new bolt. Such inspection procedure is performed for each of the irradiated fuel assemblies.

Conventionally, the used fastening bolts that have been removed are temporarily stored in a storage basket placed at the bottom of the pool near the fuel inspection table. When the basket becomes full, it is discarded for disposal. I picked up the bolts one by one using the gripping tool and transferred them to the transfer container to the site bunker.

[0004]

As described above, the conventional procedure for transferring the fastening bolts one by one takes time, and the bolts may be dropped during the transfer from the storage basket to the transfer container. Was difficult.

An object of the present invention is that the bottom lid is automatically opened in cooperation with the transfer container, and a large amount of stored scraps are efficiently transferred into the transfer container at one time without fear of dropping. It is to provide a hanging-type waste piece storage container that can be used.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is an automatic bottom lid opening / closing mechanism for a hanging type waste piece storage container which is used in combination with a transfer container so as to be seated on the transfer container. A hanging bracket integrally formed on the outer surface of the bottom lid of the storage container is hinged to the vicinity of the bottom edge of the waste piece storage container via a first shaft pin, and the bottom lid is provided between an open position and a latching closed position. A rotatable roller is provided in association with the depending bracket that engages an inwardly projecting first trigger projection provided on the inner surface of the transfer container and pivotable from the side of the storage container. It is spring-loaded so as to project somewhat outward, and the latch hook is normally pivoted inward and is pivotally attached to the side of the waste piece storage container. In the closed position, one edge of the bottom lid of the waste container is A retaining portion for releasably locking the second projecting inwardly which is provided in the transfer container inner surface
And a shoulder portion that engages with the trigger protrusion of the latch to pivot the latch hook outward against the spring biasing force.

When transferring the scrap pieces from the storage container to the transfer container, when the waste piece storage container is lowered into the transfer container in the aligned state toward the sitting position, the shoulder portion of the latch hook is moved to the second position. Of the trigger protrusion of the bottom lid, which causes the bottom lid to be released from the latch hook and pivot about the first axial pin toward the open position and eject the debris into the transfer container for debris storage. When the container is raised from the seated position on the transfer container, the rotating roller strikes the bottom of the first trigger projection to pivot the bottom lid toward the latching closed position.

In a preferred embodiment of the invention, a second axle pin is connected in parallel and spaced relation to the first axle pin for rocking movement about the first axle pin and the rotating roller is associated with the second axle pin. A spring-loaded rod is mounted to the pin and normally biases the second axial pin around the first axial pin, one end of the spring-loaded rod being pivotally attached to the second axial pin and the other end. Is attached retractably to a spring receiver fixed to the hanging bracket. Thus, during the raising of the storage container from the seated position, the rotating roller hits the bottom of the first trigger protrusion and absorbs the reaction force from the first trigger protrusion via the second shaft pin by retracting the spring pressing rod. , The bottom lid can be pivoted slightly beyond the latching closed position, so that the bottom lid can be securely latched by the latch hook. Preferably, the latch hook is pivotally mounted between a pair of parallel mounting plates secured to the sides of the storage container, the latch hook extending laterally and provided on one of the mounting plates. With a stop pin that hits the stop,
The stop pin prevents the spring from pivoting the latch hook beyond a predetermined limit. A guide roller that engages with the inner surface of the transfer container is mounted above the latch hook between the parallel mounting plates.

Preferably, around the side of the storage container,
Three guide legs having seating portions for the top edge of the transfer container are fixed at equal angular intervals, and the guide legs maintain the alignment relationship of the storage container with respect to the transfer container while maintaining the transfer container. Are arranged to move downward along the sides of the.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a storage container 10 containing, for example, about 20 channel box fastening bolts, which has been exposed to radiation, and a crane of a refueling machine (not shown). Shown in the state of being suspended above a generally cylindrical transfer container or basket 12 that is engaged with a section and located at the bottom of the irradiated fuel pool.

The upper lid 14 of the storage container 10 may be of a single-open type as shown in the figure. The transfer container 12 is of a type that is pivotally attached to the top edge so that the upper lid 16 with a handle is completely opened, and has an internal volume that can accommodate about 450 bolts. Three guide legs 18 are fixed around the side part of the storage container at equal intervals, and at least one thin guide part 20 is preferably provided on the upper side part of the transfer container in correspondence with these guide legs. Are provided at two locations, and this allows the storage container to be aligned with the transfer container. The guide leg 18 has a seating portion 19 that abuts the top edge of the transfer container.

The storage container 10 has an upper lid 14 as shown.
And an upper large diameter cylindrical housing part 24 with a lifting handle 22 and a lower small diameter cylindrical housing part 2
6 and a funnel-shaped intermediate housing part 28 located between the upper and lower housing parts. The lower housing part is provided with an automatic opening / closing mechanism 32 of the invention associated with a preferably circular bottom lid 30, which bottom opening automatic opening / closing mechanism is described with reference to FIGS. 2, 3, 4 and 5. To do.

As shown, a hanging bracket 34 extending along the radius of the outer surface of the circular bottom lid 30 of the storage container is fixed by, for example, welding. A shaft portion 35 formed integrally with the hanging bracket 34 is hinged to a mounting plate 36 provided on a side portion of the storage container via a shaft pin 38. Thus, the axle pin 38 constitutes the depending bracket 34 and thus the axis about which the bottom lid 30 pivots between its open and closed positions. As shown in FIGS. 2 and 4, a shaft pin 40 is connected to the shaft pin 38 via a link member 42 in parallel with the shaft pin 38 and at a predetermined interval. Further, an L-shaped spring receiver 48 formed integrally with one end of a spring pressing rod 46 is pivotally attached to the shaft pin 40. The other end of the spring pushing rod 46 has a spring receiver 50 fixed to the bracket 34.
Penetrates through. A nut 52 is attached to the other end of the spring push rod 46. A compression coil spring 54 is arranged between the spring receivers 48 and 50, and the spring pressing rod is retractable. As best seen in FIG. 4, a rotating roller 56 is attached to the axle pin 40 between the link member 42 and the integral spring bearing 48 of the spring push rod 46.

Preferably, for the reason described below, the rotating roller 56 attached to the shaft pin 40 projects outward from the side portion of the storage container by the action of the spring pushing rod 46, and as shown in FIG. It is adapted to engage with a trigger projection 57 provided on the inner surface of the transfer container 12 corresponding thereto. The trigger projections 57 are preferably ramps 57a, b that allow the rolling roller 56 to roll smoothly.
Equipped with.

As can be seen in FIGS. 2 and 3, the automatic bottom lid opening / closing mechanism of the present invention is located on the opposite side of the above-described hinge fastening portion, and on the cylindrical side portion of the lower housing portion 26 of the storage container. Pivotally mounted between a pair of mounted parallel longitudinal mounting plates 59, and in a normal state,
It includes a latch hook 60 that is spring-loaded inward by a torsion spring 58 provided above it. This latch hook is a latching recess 6 that releasably locks a part of the peripheral edge of the circular bottom lid 30 of the storage container in the closed position of the bottom lid.
2 and a shoulder portion 64, and the shoulder portion 64 is adapted to engage with a trigger protrusion 44 provided on the inner surface of the transfer container in a diametrically opposed relationship with the trigger protrusion 57. Further, the latch hook 60 preferably has an inclined lower end portion 67. It is preferable to have a stop pin 66 that engages with one notch or locking portion of the mounting plate 59 to prevent the torsion spring 58 from pivoting the latch hook beyond a predetermined limit. As shown, a guide roller 68 is provided above the pivoting latch hook 60 between the parallel mounting plates 59 which engages the inner surface of the transfer container during bolt transfer. Helps maintain alignment.

FIG. 5 shows the storage container 1 for the transfer container 12 during the transfer of the bolt from the storage container to the transfer container.
It shows a state of 0 just before sitting. When the storage box 10 full of channel box fastening bolts is being lowered into the transfer container in alignment, in the preferred embodiment, the rotating roller 56 first hits the upper ramp 57a of the trigger projection 57 of the transfer container 12, 5, the bottom lid 30 rotates slightly clockwise and the spring pushing rod 46 retracts somewhat to prevent damage to the automatic opening / closing mechanism.

After the rotating roller 56 has passed the trigger projection 57, the shoulder 64 of the opposite latch hook 60 abuts the flat upper end of the trigger projection 44 of the transfer container 12 to pivot the latch hook clockwise. As a result, the bottom lid 30 that was in the hooked and closed position is disengaged from the latch hook 60, and is pivoted counterclockwise toward the open position shown by the imaginary line in FIG. Then, the stored bolts are dropped all at once into the transfer container. The lowering of the storage container is continued until the seat 19 of the guide leg 18 engages the top edge of the transfer container.

When the waste piece storage container is raised from the seated position on the transfer container, the shoulder portion 64 of the latch hook 60 separates from the trigger protrusion 44, and the latch hook returns to its original position by the action of the torsion spring 58. . Next, the rotating roller 56 hits the lower ramp 57b of the trigger projection 57, and the reaction thereof causes the bottom lid to pivot toward the latching closed position. Such a reaction is such that the bottom lid 30 crosses over the slanted lower end 67 of the latch hook and reaches its latched closed position. Since the rotating roller 56 projects laterally beyond the flat surface of the side portion of the storage container, the bottom lid can be reliably brought to its latching closed position. Further, since the spring pushing rod 46 is provided so as to be retractable, no force that causes damage to the bottom lid automatic opening / closing mechanism is applied.

[0019]

With the above construction, a large amount of waste pieces can be transferred from the storage container to the transfer container at one time, which saves time and is efficient. The storage container of the present invention can be operated from a distance, and since the bottom lid is automatically opened and closed, even bolts that have been irradiated with radiation can be safely transferred.

[0020]

[Brief description of drawings]

FIG. 1 is a perspective view of a waste piece storage container used in combination with a transfer container to a site bunker.

FIG. 2 is a sectional elevation view of a waste piece storage container, schematically showing the bottom lid automatic opening / closing mechanism of the present invention.

FIG. 3 is a side view of a latch hook that constitutes the bottom lid automatic opening / closing mechanism of the present invention as seen along the line AA in FIG.

FIG. 4 is a side view of a pivotal mounting portion that constitutes the bottom lid automatic opening / closing mechanism of the present invention, taken along line BB in FIG.

FIG. 5 is a view showing a state of the storage container on the verge of seating with respect to the transfer container, and is a view for explaining the transfer work of the channel box fastening bolts.

[Explanation of symbols]

 10 Waste Piece Storage Container 12 Transfer Container 18 Guide Leg 30 Bottom Lid of Storage Container 32 Automatic Opening / Closing Mechanism 34 Hanging Bracket 38, 40 Shaft Pin 42 Link Member 44, 57 Trigger Protrusion 46 Spring Push Rod 54 Coil Spring 56 Rotating Roller 58 Twist Re-spring 60 Latch hook 62 Hooking portion 64 Shoulder 66 Stop pin 68 Guide roller

Claims (5)

[Claims] 1. A bottom lid automatic opening / closing mechanism of a hanging type waste piece storage container, which is used together with a transfer vessel and is seated on the transfer vessel, which is integrally formed on the outer surface of the bottom lid of the waste piece storage container. The suspended bracket is hinged to the vicinity of the bottom edge of the waste piece storage container via the first shaft pin, and the bottom lid is pivotable between an open position and a latching closed position, and is attached to the inner surface of the transfer container. A rotating roller is provided in association with the depending bracket that engages an inwardly projecting first triggering protrusion, said rotating roller being spring biased to project somewhat outward from the side of the container. The latch hook is pivotally attached to the side portion of the waste piece storage container in a state where it is normally spring-loaded inward, and the latch hook is located at the bottom closed position of the waste piece storage container in the latching closed position. Latching part that releasably locks a part of the periphery of And a shoulder portion that engages with an inwardly projecting second trigger protrusion provided on the inner surface of the transfer container and pivots the latch hook outwardly against the spring biasing force. When transferring the scrap pieces to the transfer container, the shoulder portion of the latch hook contacts the top portion of the second trigger protrusion when the waste piece container is lowered into the transfer container in the aligned state toward the sitting position. , By which the bottom lid is released from the latch hook and pivots around the first axial pin towards the open position and discharges debris into the transfer container to displace the debris storage container into the transfer container. An automatic bottom lid opening / closing mechanism, wherein, when raised from the seated position, the rotating roller hits the bottom portion of the first trigger protrusion to pivot the bottom lid toward the latching closed position. 2. A second shaft pin is connected in parallel with the first shaft pin at a distance so as to swing around the first shaft pin,
The rotating roller is attached to the second shaft pin, and in the normal state, a spring pressing rod is provided to bias the second shaft pin around the first shaft pin, and one end of the spring pressing rod has a second shaft.
2. The automatic bottom lid opening / closing mechanism according to claim 1, wherein said bottom lid automatic opening / closing mechanism is pivotally attached to said shaft pin, and the other end is attached to a spring receiver fixed to said hanging bracket so as to be retractable. 3. The latch hook is pivotally mounted between a pair of parallel mounting plates secured to the sides of the container, the latch hook extending laterally and provided on one of the mounting plates. With a stop pin that hits the locked part,
2. The automatic bottom lid opening / closing mechanism according to claim 1, wherein the stop pin prevents the latch hook from pivoting beyond a predetermined limit by a spring. 4. A seating portion for the top edge of the transfer container is provided at equal angular intervals around the side of the storage container.
A guide leg of a book is fixed, characterized in that
Automatic bottom lid opening and closing mechanism. 5. The automatic bottom lid opening / closing mechanism according to claim 3, wherein a guide roller that engages with the inner surface of the transfer container is mounted above the latch hook between the parallel mounting plates.