JP2504082Y2 - Cross-type adhesive joint - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cross-type adhesive joint for use in a space structure such as an artificial satellite body made of fiber reinforced composite material or an antenna tower mounted on a satellite. .

[Conventional technology]

FIG. 2 is a view showing a conventional cross-type adhesive joint, FIG. 2 (a) is an external view, and FIG. 2 (b) is a sectional view taken along line CC of FIG. 2 (a).

In the figure, (1) is the first thin-walled cylinder, (2) is the second
Is a thin-walled cylinder, (3) is a third thin-walled cylinder, (4) is a fourth thin-walled cylinder, and (8) is a cross-type connector.

The conventional cross-type adhesive joint is constructed by the first thin-walled cylinder (1), the second thin-walled cylinder (1), and the second thin-walled cylinder (1) from four directions on the four arm portions of the cross-shaped connector (8) integrally formed and formed as described above. The cylinder (2), the third thin-walled cylinder (3) and the fourth thin-walled cylinder (4) are inserted and bonded.

[Problems to be solved by the invention]

In the conventional cross-type adhesive joint as described above, the cross-type connector has a saddle type outer shape in which two cylinders intersect each other. However, it is difficult to reduce the thickness of the saddle-shaped part by reducing the thickness of the saddle-shaped part and it becomes a heavy object.

The present invention has been made in order to solve such a problem, and eliminates the saddle-shaped portion of the above-mentioned cross-type connector, which is difficult to machine, thereby achieving cost reduction and easy weight reduction. The purpose is to obtain a joint.

[Means for solving problems]

The cross-type adhesive joint according to the present invention has one joining plate inserted into each U-shaped notch provided at each end of each of the first, second, third and fourth thin-walled cylinders. In the semicircular gap formed between the thin-walled cylinder and the joining plate, a thin-walled two-divided cylinder having a similar semicircular cross-sectional shape is inserted and bonded.

[Action]

In the present invention, the load and bending moment transmitted from each of the first, second, third and fourth thin-walled cylinders are applied to the thin-walled cylinders 2 inserted and bonded to the ends of these thin-walled cylinders.
It is transmitted to the joint plate through the split cylinder, but then again through the joint plate to the first, second, third and fourth joint plates.
It is transmitted to the thin-walled cylinder of and exhibits the function as a crossing joint.

〔Example〕

An embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 (a) is a diagram showing a cross-type adhesive joint according to the present invention, and FIG. 1 (b) is a sectional view.

In the figure, (1) is a first thin cylinder, (2) is a second thin cylinder, (3) is a third thin cylinder, (4) is a fourth thin cylinder, and (5) is a U-shaped cut. Notch, (6) is a joining plate, and (7) is a thin-walled two-division cylinder.

 Next, the operation of the above embodiment will be described.

First thin-walled cylinder (1), second thin-walled cylinder (2), third
The thin-walled cylinder (3) and the fourth thin-walled cylinder (4) have two U-shaped notches (5) at circumferentially symmetrical positions at the ends where they are connected to each other. The joining plate (6) is inserted into the V-shaped notch (5), and the plate and the first thin-walled cylinder (1), the second thin-walled cylinder (2), the third thin-walled cylinder (3), and the fourth thin-walled cylinder First, second, third, and fourth thin-walled cylinders are formed by inserting and adhering two thin-walled two-divided cylinders (7) in upper and lower portions in the respective gaps with the circular cylinder (4) to form a cross-type adhesive joint. The load transmitted from the
It is transmitted to one joining plate (6) through the split cylinder (7) and again through the thin-walled two-split cylinder (7) located at the other end. It is transmitted to a thin cylinder.

[Effect of device]

As described above, according to the present invention, it is easy to reduce the weight of the joining plate by appropriately changing the thickness of the joining plate according to the magnitude of the load flowing from the first, second, third and fourth thin cylinders. , In addition, since the joint plate, which has a very simple shape as the joint, serves as the load transmission path, the first, second, third, and fourth thin-walled cylinders are coupled to each other in the joint plate plane with the joint angle. It has the advantage that it can be freely set according to the angle to be used. Furthermore, the use of a fiber-reinforced composite material with low density that secures strength and rigidity by connecting fibers is simple because the shape is simple. This is possible and has the effect of significantly reducing weight.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) show an embodiment of the present invention.
(A) (b) is a figure of the conventional cross type adhesive joint. In the figure, (1) is the first thin-walled cylinder, (2) is the second thin-walled cylinder, (3) is the third thin-walled cylinder, (4) is the fourth thin-walled cylinder, and (5) is U-shaped. Notch, (6) is a joining plate,
(7) is a thin, two-divided cylinder, and (8) is a cross-type connector. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims (1)

(57) [Scope of utility model registration request] 1. An end portion is located on a straight line with a first thin-walled cylinder having U-shaped notches cut in the longitudinal direction at two locations which are symmetrical on the circumference, and the first thin-walled cylinder. , The end portion intersects with the second thin-walled cylinder having U-shaped notches cut in the longitudinal direction at two locations which are symmetrical on the circumference, and the end portion which intersects the first and second thin-walled cylinders at an arbitrary inclination Is a third thin-walled cylinder having U-shaped notches cut in the longitudinal direction at two locations symmetrical about the circumference,
A fourth thin-walled cylinder having U-shaped notches cut in the longitudinal direction at two locations which are aligned with the third thin-walled cylinder and whose ends are circumferentially symmetrical, and the first, second A joining plate inserted into a U-shaped notch provided at the end of each of the third and fourth thin-walled cylinders, the first, second, third, and fourth thin-walled cylinders, and the ends of these thin-walled cylinders A semicircular thin-walled two-column cylinder inserted in the longitudinal direction and bonded to each of the semicircular gaps formed between the joining plates inserted in the U-shaped notches of the section. Characteristic cross type adhesive joint.