JP2892442B2 - Buffer structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a buffer structure for protecting a container by absorbing and relaxing an impact applied to a container such as a radioactive substance transport container when the container falls or falls. About.

[Prior Art] For example, as a conventional buffer structure for a radioactive substance transport container, as shown in FIG. Wood
As shown in FIG. 5, a wood type buffer structure filled with 13 as a filler, or a concrete type buffer structure in which a buffer container 12 is filled with concrete 14, such as vermiculite concrete, as shown in FIG. A pipe-type buffer structure in which a number of steel pipes 15 are regularly filled in a buffer container 12 is known.

[Problems to be Solved by the Invention] However, in a wood-type buffer structure, the filler wood is a flammable substance and does not have fire resistance. There is a problem that variation occurs.

In the concrete type buffer structure, the filler is concrete (composition example: alumina cement = 30 to 40% by weight, vermiculite = 10 to 20% by weight, water = 45 to 55% by weight), but it is nonflammable. However, there is a problem that it is difficult to fill uniformly, and the impact buffering characteristics are likely to vary, and since water is contained, at low temperatures (0 to 40 ° C.), the impact buffering characteristics decrease due to freezing.

Further, in the pipe type buffer structure, when the deformation progresses to a certain extent, there is a problem that the impact resistance characteristic is sharply reduced due to the buckling of the steel pipe, and after the steel pipe is formed into a predetermined shape of different types. However, they must be combined regularly, which causes a problem that the manufacturing process is complicated and the cost increases.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a shock absorbing structure which is easy to manufacture and has stable shock damping characteristics.

Means for Solving the Problems In order to solve the above problems, a buffer structure of the present invention includes: a buffer container that covers at least a part of a transport container that stores an object to be transported; And a partition member for partitioning the inner space into a plurality of spaces, and a cushioning material piece that is irregularly filled in each of the plurality of spaces.

In the present invention, as the small buffer material, metal or porcelain is preferable because it is nonflammable and excellent in fire resistance. Further, as the metal material constituting the small cushioning material piece, stainless steel, aluminum alloy, carbon steel, or the like is preferable from the viewpoint of corrosion resistance, mechanical strength, and the like.

Further, as suitable as cushioning material small pieces, for example, Raschig ring, lessing ring, Berl saddle,
An artificial packing used for the packed tower, such as a pole ring, or a cut piece of a molded article formed into a predetermined shape such as an aluminum extrusion molded article is preferable.

Further, the above-mentioned components may be combined and used as a small cushioning material piece.

[Operation] In the buffer structure according to the present invention, a large number of small buffer material pieces are filled in each of the spaces of the buffer container divided into a plurality of sections by the partition member, and the buffer material pieces are filled in the buffer container. The occurrence of large deviation is suppressed. That is, the above-mentioned section serves to prevent the occurrence of excessive deformation and movement of the filler when a fall accident occurs and the shock absorber is deformed. Small pieces of cushioning material in the cushioning container are irregularly filled, so that shock-absorbing properties such as compressive strength do not vary depending on the direction (directionality), exhibit excellent shock-absorbing ability, Absorb the shock applied to the shipping container. Further, since the filling of the buffer material pieces is irregular, the filling operation is easy.

In the case of using metal or porcelain artificial fillers such as Raschig rings, ressi rings, berl saddles, and pole rings, or cut pieces of molded articles such as aluminum extruded articles, these small pieces of cushioning material are incombustible. It has excellent fire resistance and cold resistance because it is water resistant and contains no moisture. Furthermore, since there is no need to specially form the cushioning pieces and the filling operation is easy, the production cost is reduced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front (partial cross-sectional view) showing a buffer structure for a radioactive substance transport container according to an embodiment of the present invention, FIG. 2 is a side sectional view thereof, and FIG. It is a front view showing the state where the buffer structure was attached.

As shown in the above figure, the buffer body container 1 made of a steel plate has a cylindrical shape with a hole at the center, and the inner periphery thereof has an end portion of the radioactive substance transport container 5 (FIG. 3). Mating recess 1a
Are formed. The inner space of the buffer body container 1 is partitioned by a partition member 2 made of a wire mesh, and is divided and divided into five substantially uniformly in a circumferential direction. Each of the five divided spaces has a Raschig ring 3 made of stainless steel.
Are irregularly filled.

The buffer structure 4 thus configured has little variation in the direction of the buffer absorption characteristics, and is attached to both ends of the radioactive substance transport container 5 by bolts 6, 6,... As shown in FIG. As a result, the impact received by the radioactive substance transport container 5 in the event of a drop or the like is reliably absorbed.

In the above embodiment, a Raschig ring made of stainless steel is used as the cushioning material piece 3, but other than this, a metal or porcelain artificial filling such as a dressing ring, a Berl saddle, a pole ring, or an extruded aluminum product A cut piece of a molded product such as the above, or a combination thereof can be used as the cushioning material small piece 3.

In the above embodiment, the buffer structure for a radioactive material transport container having a columnar outer shape is shown. However, the buffer structure of the present invention is not limited to the above-described radioactive material transport container, but may be a rectangular parallelepiped or any other shape. The present invention can be applied to a container, and further can be applied to a radioactive substance transporting container having a radiating fin in a body portion thereof.

In the above-described embodiment, the buffer structure is configured to cover both ends of the container. However, the buffer structure may be configured to cover the entire container. In that case, the buffer structure may be formed integrally or may be formed separately.

Further, in the above-described embodiment, the buffer structure of the radioactive substance transport container has been described. However, the buffer structure of the present invention is not limited to this. It is possible to

Further, the present invention is not limited to a transport container, and can be applied to a buffer structure of a stationary container.

[Effects of the Invention] In the buffer structure of the present invention, the internal space of the buffer container is partitioned by the partition member, and the partitioned spaces are randomly filled with the buffer material pieces, so that the filling is easy. With
The shock absorbing characteristics do not vary depending on the direction, and the shock applied to the transport container when the transport container falls can be effectively absorbed.

Furthermore, when deformation of the buffer occurs when the transport container falls, for example, it is possible to prevent excessive deformation and movement of the filler.

In addition, a buffer structure using a small piece of metal or porcelain cushioning material is nonflammable and excellent in heat resistance, and does not freeze since it does not contain moisture, and is also excellent in cold resistance. In addition, since the packing for the packed tower and the cut piece of the molded product are used as the packed material, it is not necessary to specially form a small cushioning material piece, and the filling operation is easy, so that the manufacturing cost is reduced, A buffer structure having excellent shock absorbing performance can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing a buffer structure according to an embodiment of the present invention, FIG. 2 is a side sectional view taken along the line II-II of FIG. 1, and FIG. 3 is the buffer structure. FIG. 4, FIG. 5, FIG. 6, and FIG. 6 are cross-sectional views showing a conventional buffer structure. DESCRIPTION OF SYMBOLS 1 ... Buffer container 2 ... Partition member 3 ... Buffer material small piece 5 ... Transport container

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G21F 9/36 G21F 5/00 B65D 81/06

Claims (2)

(57) [Claims] 1. A buffer container that covers at least a part of a transport container that stores an object to be transported, a partition member that partitions a space in the buffer container into a plurality of spaces, and a space partitioned into the plurality of spaces. And a cushioning material piece filled irregularly. 2. The method according to claim 2, wherein the cushioning material pieces are made of metal or porcelain.
The cushioning structure according to claim 1, wherein the cushioning structure is a filler such as a Raschig ring, a dressing ring, a Berl saddle, a pole ring, or a cut piece of a molded product, or a combination thereof.