JP3514330B2 - Sandwich structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandwich structure suitable for use as a constituent member of a spacecraft.

[0002]

2. Description of the Related Art As a sandwich structure of this type,
For example, as shown in FIG. 11, a corrugated panel 10 serving as a core material
There is a structure in which 0 is sandwiched between two flat plates 101, 101.

[0003]

However, in the conventional sandwich structure using the corrugated panel 100 as described above, the strength against bending about the axis in the X-axis direction in the drawing, which is the direction in which the corrugations are arranged, is high. On the other hand, there is a problem that the strength against bending around the axis in the Y-axis direction in the drawing, which is the muscular direction of the waveform, is small, and the difference is large, and it has been a problem to solve such a problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is a sandwich structure used as a constituent member of a spacecraft, which has an X-axis and a Y-axis on a face plate.
It is an object of the present invention to provide a sandwich structure that can obtain the same strength against bending about each axis.

[0005]

A sandwich structure according to the present invention is a sandwich structure used as a constituent member of a spacecraft, and in claim 1, corrugated beams are arranged in parallel at regular intervals. Along with that, the beams forming the same waveform are arranged in parallel at a constant interval while intersecting each beam,
In addition, the crests and troughs of each beam are alternately combined, a face plate made of a grid is provided on both sides of these beams, and other parts are provided at the intersections of the bars of the lattice making up the face plate. In order to solve the above-mentioned problems, the present invention has a structure in which a connecting tool for mounting the structure is provided, and the ribs are provided on each rail of the lattice forming the face plate in the longitudinal direction thereof. Is used as a means.

[0006]

In the sandwich structure according to the first aspect of the present invention, the strength against bending around the X axis and the strength against bending around the Y axis on the face plate are equal due to the plurality of corrugated beams arranged vertically and horizontally. In addition, since it uses a face plate composed of a lattice, it becomes even lighter in weight while obtaining the above-mentioned strength, and due to the connecting tool provided at the intersection of the lattice bars, Attach and support other structures. In the sandwich structure according to the second aspect of the present invention, the strength and rigidity of the face plate and the whole are further enhanced by the ribs provided on the respective bars of the lattice.

[0007]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The sandwich structure 1 shown in FIG.
It is used as the main structure of the replenishment section exposure zone B in the experimental module A of the space station shown in 0 (a) and (b). The experiment module A includes, in addition to the replenishment section exposure zone B, a pressurizing section C, a replenishment section pressurization zone D, an exposure section E to which various experimental devices are attached, a manipulator F, and the like. The replenishment section exposure zone B is loaded with a payload G such as an experimental device or a replenishment article, and is launched by, for example, a space shuttle, and is attached / detached to / from the replenishment section pressure zone D or the exposure section E by the manipulator F. It will be collected after being replaced.

The sandwich structure 1, which is the main structure of the replenishment section exposed area B, has a plurality of corrugated beams 2 arranged vertically and horizontally, and the face plates 3 and 3 are provided on both sides of the beams 2 in between. It has a configuration provided.

As shown in FIG. 2 (a), the beam 2 has a corrugated shape formed by alternately connecting the inclined portions 2a and the horizontal portions 2b, and has an I-shaped shape as shown in FIG. 2 (b) over the longitudinal direction. The horizontal portion 2b has a through hole 2c for connecting the face plates. A plurality of beams 2 are arranged in parallel at regular intervals, and at this time, the beams 2 and 2 adjacent to each other are arranged so that the peaks and valleys thereof are lined up. The books are arranged in parallel at regular intervals, and the peaks and valleys of the vertical and horizontal beams 2 are alternately combined.

As shown in FIG. 3 (a), the face plate 3 has vertical and horizontal crosspieces 3e and 3f in frames 3a to 3d forming the periphery thereof.
And the crosspieces 3g and 3h in two diagonal directions are combined. As shown in FIG. 3B, each of the crosspieces 3e to 3h has a T-shaped cross-sectional shape having a rib 3r in the middle.

As shown in FIG. 4, the respective beams 2 and the face plates 3 arranged are in such a positional relationship that the respective horizontal portions 2b and the intersections of the respective legs 3e to 3h correspond to each other, and the respective beams 3e of the face plate 3 are arranged. ~ 3h
A through hole 3s for beam connection (see FIG. 5) is provided at the intersection of the. Then, as shown in FIG. 5, the beam 2 and the face plate 3 are screwed with each other by screwing a bolt 4 passed through a through hole 2c of the beam 2 and a nut 5 inserted into a through hole 3s of the face plate 3 to each other. It is connected.

Further, as shown in FIGS. 6 and 7, a connecting tool 6 of another structure is provided at the intersection of the crosspieces 3e to 3h on the face plate 3. Each connecting tool 6 has two bolt mounting holes 6a on the left and right sides, and a bolt mounting hole 6b which is slightly larger than the bolt mounting holes 6b at the center. It is fixed to the face plate 3 by a nut 8. Then, by the bolt 9 and the nut 10 inserted through the central bolt mounting hole 6b,
In FIG. 7B, another structure indicated by an imaginary line, such as the above-described holding device 11 for the payload G, is fixed.

Besides, the sandwich structure 1 is shown in FIG.
As shown in FIG. 9 and FIG. 9, the keel part 13 having the keel trunnion 12 is connected to the lower part in the figure, and the longelon part 15 having the longelon trunnion 14 is provided on the left and right parts. Be connected. Furthermore, the sandwich structure 1 has
The bus device 16 is attached, and the connection device 1 to the replenishment section pressurization zone D or the exposure section E is also provided on the upper side.
8 and a connecting portion 17 for handling with the manipulator F are attached via the supporting bodies 20 and 19, and another connecting portion 22 is attached to the face plate 3 on one side via the supporting body 21. It constitutes the replenishment section exposure zone B of.

The sandwich structure 1 which is the main structure of the above-mentioned replenishment section exposed area B employs a plurality of corrugated beams 2 arranged vertically and horizontally, so that it is far superior to the case where a corrugated panel is used. In addition to being lightweight, the strength against bending around the X-axis and the strength and rigidity against bending around the Y-axis on the face plate 3 are equal, and moreover, the face plate 3 is composed of a lattice and the lattice has ribs 3r. The crosspiece 3e to have
Since it is configured for 3 hours, it is lighter and has sufficient strength.

Therefore, the above sandwich structure 1
Is equipped with a payload G as a replenishment section exposure zone B,
For example, it will be launched by a space shuttle,
It is possible to sufficiently bear the load at the time of launch.

[0018]

As described above, according to the sandwich structure according to the first aspect of the present invention, the weight can be reduced by adopting the beams, and the X-axis and the X-axis on the face plate can be realized. Equivalent strength can be obtained for bending around each axis of the Y-axis, and by constructing the face plate with a lattice, it is possible to achieve further weight reduction in addition to the above-mentioned strength and rigidity. Therefore, in particular, as a component of a spacecraft, it has an advantage of being lightweight, and also has sufficient load bearing capacity for a load at launch. Further, according to the sandwich structure, another heavier structure can be surely supported by the connecting tool provided at the intersection of the lattice bars, and
By locating the connector at each intersection, attachment of other structures of various sizes can be easily accommodated, resulting in more loads to be loaded.

According to the sandwich structure of claim 2 of the present invention, the same effect as that of claim 1 can be obtained, and the ribs are provided on the crosspieces of the lattice to enhance the strength of the face plate. Therefore, the strength of the entire structure can be increased.

[0020]

[Brief description of drawings]

FIG. 1 is a perspective exploded view illustrating a replenishment section exposure zone of an experimental module including a sandwich structure according to an embodiment of the present invention.

FIG. 2 is a perspective view (a) and a sectional view (b) illustrating a beam.
Is.

FIG. 3 is a perspective view (a) and a cross-sectional view (b) of a crosspiece for explaining a face plate.

FIG. 4 is a perspective view illustrating a beam and a face plate.

FIG. 5 is a perspective view for explaining a connecting procedure of a beam and a face plate.

FIG. 6 is a plan view for explaining the arrangement of connectors on the face plate.

FIG. 7 is an enlarged plan view of the connector part on the face plate (a).
FIG. 4B is a cross-sectional view of FIG.

FIG. 8 is a perspective view for explaining a replenishment section exposure zone of the experimental module.

FIG. 9 is a front view (a), a plan view (b) and a side view (c) for explaining a replenishment section exposure area.

FIG. 10 is a perspective view illustrating a state where the replenishment section exposure section is connected to the exposure section in the experimental module (a), and a perspective view illustrating a state where the replenishment section exposure section is connected to the replenishment section pressurization section (b). Is.

FIG. 11 is a perspective view illustrating a conventional sandwich structure.

[Explanation of symbols]

1 Sandwich structure 2 beams 3 faces 3e to 3h crosspiece 3r rib 6 connector

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shirogane Hiroshi               2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa               Sansan Co., Ltd. (72) Inventor Akio Miyoshi               2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa               Sansan Co., Ltd. (72) Inventor Go Ozawa               3-5-1 Momoi, Suginami-ku, Tokyo                 Nissan Aerospace Engineering                 Within                (56) Reference JP-A-5-77796 (JP, A)                 JP-A-49-6728 (JP, A)

Claims (2)

(57) [Claims] 1. A sandwich structure used as a constituent member of a spacecraft, wherein corrugated beams are arranged in parallel at regular intervals, and the same corrugated beams are intersected at regular intervals. The beams are arranged in parallel, and the peaks and valleys of the beams are alternately combined, and a face plate composed of a lattice is provided on both sides of the beams with the beams interposed therebetween. A sandwich structure, wherein a connecting tool for attaching another structure is provided at a crossing part of the sandwich structure. 2. The sandwich structure according to claim 1, wherein ribs are provided on each of the bars of the lattice forming the face plate in the longitudinal direction thereof.