JPS6243866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting two honeycomb plates by connecting each end of the two honeycomb plates with medium strength.

In recent years, honeycomb boards used for the floorboards of aircraft, the bottoms and side walls of hovercraft, etc. have a structure in which the top and bottom of a honeycomb core are covered with a surface board, respectively. Figures 1 and 2 are rigid connection methods that maintain strength so that the bending moment can be sustained when connecting at each connection end.
Conventional examples as shown in FIGS. 3, 3, and 4 are known.

In these joining methods, each connecting end of two honeycomb plates 3 whose upper and lower sides of the honeycomb core 1 are respectively closed with face plates 2A and 2B is connected to one of the face plates 2A and 2B.
2B to the connecting plate 4, and the other surface plate 2A, 2
This is a method in which the load flows as shown in Fig. 1, but in the case of Fig. 1, the top plates 2A and 2B are not reinforced at their ends, and as a result, the top plates 2A and 2B are not reinforced at their ends for the purpose of reducing weight.
Assuming that A and 2B are made as thin as possible, when driving rivets, the strength must be transmitted through the surface pressure of the surface plates 2A and 2B, which increases the number of rivets that need to be driven and increases the number of man-hours. The disadvantage is that the area must be expanded.

In addition, when bonding each connection end, the honeycomb plates 2A and 2B are bonded and manufactured first, and then the joints are bonded, so the ends of the honeycomb plate 3 must be heated, so high temperature curing is required. However, there is a disadvantage in that the area of the joint at each joint end must be increased to compensate for the poor reliability.

Next, in FIGS. 2 and 3, U-shaped honeycomb edge members 5 are attached to the upper and lower surface plates 2A, 2B at the connecting ends of the two honeycomb plates 3 by adhesive or the like to strengthen them. Therefore, the drawbacks of the conventional example shown in FIG. Since the honeycomb edge material 5 and the connecting plate 4 disappear over a considerable length, the honeycomb edge material 5 and the connecting plate 4 become like a rigid frame structure, and as a result, they have to receive a moment, so it is necessary to increase the strength of these members. However, the disadvantage is that it is heavier.

Further, when manufacturing a honeycomb board, heat and pressure are applied as shown in FIG. 5a to cure the adhesive. Due to the heat and pressure, the leading edge of the edge material tends to bend inward, as shown in Figure 5b. Therefore, in normal rivet driving, the rivets are not sufficiently tightened and become ineffective, as shown in FIG. 5b after curing.

Furthermore, as in the other conventional example shown in FIG. 4, the upper and lower surface plates 2A, 2B of each connection end of the honeycomb board 3 are filled with insert materials 6 such as wood, and the upper and lower surface plates 2A, 2B are filled with the insert material 6 such as wood. Each outer side of the connection end of is covered with a connection plate 4 in a sandwich-like manner, and each connection end is further covered with a connection plate 4, a surface plate 2A, 2B,
A fastening member 7 such as a bolt passing through the insert material 6
There is also a method in which two honeycomb plates 3 are connected by attaching a
Although the drawbacks of the prior art examples shown in FIGS. 2 and 3 are corrected, the insert material 6 is required to have considerable rigidity, making it impossible to use a lightweight insert material 6.

Therefore, in FIG. 4, if the insert material 6 is made lightweight and non-rigid in order to reduce the weight, and the surface plates 2A and 2B are made as thin as possible,
The surface pressure of the studs is applied only to the more rigid surface plate,
There is a problem that no load is applied to the insert material, resulting in the same drawback as shown in FIG. 1.

Therefore, the present invention has been made to solve the above-mentioned conventional drawbacks and problems, and it is possible to maintain the strength of the connecting end of the honeycomb plates and connect two honeycomb plates without increasing the weight. The purpose is to provide a connection method that allows

That is, in the method of connecting two honeycomb plates of the present invention, U-shaped honeycomb edge members are placed in the upper and lower surface plates of each connecting end of two honeycomb plates in which the upper and lower sides of the honeycomb core are respectively closed with surface plates. The honeycomb edge material is fitted so that the connecting ends are covered, and the outer sides of the connecting ends of the upper and lower surface plates are covered in a sandwich-like manner with connecting plates, and the upper and lower surfaces of the connecting ends are The present invention is characterized in that the two honeycomb plates are connected by attaching fastening members that pass through the connecting plate, the surface plate, and the honeycomb edge material.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, and the same parts as in each of the conventional examples shown in FIGS. 1 to 4 are indicated by the same part numbers.

First, the connection method of the embodiment of the present invention shown in FIG.
This method is a combination of the conventional examples shown in FIG. 2 and FIG. A U-shaped honeycomb edge material 5 is fitted into the surface plates 2A and 2B so as to cover the honeycomb edge material 5, and the outer sides of the connection ends of the upper and lower surface plates 2A and 2B are connected. After covering the plate 4 in a sandwich-like manner, fastening members 7 such as studs passing through the connecting plate 4, the surface plates 2A and 2B, and the honeycomb edge material 5 are respectively attached to the upper and lower surfaces of the connecting plate 4, the top plates 2A and 2B, and the honeycomb edge material 5, thereby connecting the two honeycomb plates 3. The connection is made with medium strength through the connection plate 4.

Here, in the connection method of the present invention, since the honeycomb edge material 5 web is located at the end of the honeycomb plate 3,
Even if heat and pressure are applied during manufacturing of the honeycomb plate 3, it is possible to prevent the edge material from bending inward and the fastening member 7 becoming useless.

Further, since there is no curved surface, the adjustment of the liner or filler is easy and the work is not so difficult due to the difference in height between the left and right honeycomb plates 3 due to the tolerance of the edge material 5.

In addition, as the connection plate 4, the surface plates 2A, 2 are usually used.
It is preferable to use a plate thicker than B, and a material having a material strength equal to or greater than that of the honeycomb edge material 5 and the surface plates 2A and 2B.

Moreover, as the fastening member 7, in addition to rivets, bolts and
Nuts may be used, but it is necessary to attach the nuts to the edge material before gluing the honeycomb board so that it can be attached from one side.

Therefore, if two honeycomb plates are connected by the connection method of the present invention, a connection can be obtained that maintains sufficient strength even at the connection end without increasing the weight of the joint part, and the number of fastening members can be reduced. It is also possible to minimize the number of connections, thereby reducing the number of connection work steps.

Further, by fastening the connecting ends of the honeycomb plates with fastening members such as bolts and nuts, there is an advantage that the honeycomb plates can be easily attached to and detached from each other after being connected.

In particular, the connection method of the present invention does not require an insert material or the like in the connection part, so the weight of the connection part can be reduced, the structure of the connection part can be simplified, and the height of the connection ends of the honeycomb plates can be reduced. This has the advantage that adjustment is easy.

[Brief explanation of the drawing]

Figures 1, 2, 3, and 4 are side views of main parts showing different conventional methods for connecting two honeycomb plates, and Figures 5a and 5b are cure treatment conditions. FIG. 6 is a side view of a main part showing a method of connecting two honeycomb plates in each embodiment of the present invention. 1...honeycomb core, 2A, 2B...surface plate,
3... Honeycomb plate, 4... Connection plate, 5... Honeycomb edge material, 7... Fastening member.

Claims (1)

[Claims] 1 Place a U-shaped honeycomb edge material in the upper and lower surface plates of each connecting end of two honeycomb plates whose top and bottom of the honeycomb core are respectively closed with surface plates, so that the honeycomb edge material closes the connecting ends. After fitting, the outer sides of the connecting ends of the upper and lower surface plates are covered in a sandwich-like manner with connecting plates, and the upper and lower surfaces of each of the connecting ends are penetrated through the connecting plate, the surface plate, and the honeycomb edge material. A method for connecting two honeycomb plates, characterized in that they are connected by attaching fastening members respectively.