JPS6327031B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a skeleton made of balsa wood or the like,
The present invention relates to a method of manufacturing a model airplane that is equipped with an engine and a receiver and flies by radio control.

The conventional manufacturing method for model airplanes is, for example,
As disclosed in Japanese Patent No. 49-120394, a framework was formed by bonding wooden framework members with adhesive in advance, and then an outer skin was attached to the framework. However, with this method, in addition to the work of assembling the frame, it is necessary to separately bend and bend the outer skin, and furthermore, the work of pasting the outer skin cannot be done until the adhesive of the frame hardens and develops strength, resulting in fabrication. There were problems in that the process became complicated and the manufacturing time increased. Furthermore, when adhering the frame members to each other, the frame members must be positioned, and there is a problem in that the frame assembly workers also require skill.

The present invention has been made in view of these points, and its purpose is to use a material that is easy to bend and has shape retention properties as the outer skin, so that the assembly of the frame members is easy and the manufacturing process is easy. An object of the present invention is to provide a method for manufacturing a radio-controlled model airplane that can be simplified.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on an example of a fuselage among the constituent members of an airplane shown in the drawings.

Figure 1 shows assembly plate A, which is the outer skin used in the present invention.
FIG. As shown in FIG. 2, this assembly board A is made by gluing a printed paper 2 on which a cut section pattern is appropriately printed on the surface of a foamed synthetic resin board 1, and then gluing a synthetic resin film 3 to the surface of the printed paper 2, as shown in FIG. It has a structure in which reinforcing paper 4 is adhered to the back surface of a foamed synthetic resin board 1. Assembly plate A is cut along cutting line 5 to form assembly B. Then, the assembly B is made by curving the assembly B so that the center line 6 drawn with a very thin line becomes the center part of the fuselage C of the model airplane, and the fuselage side parts X,
X' is formed, and further bent at a substantially right angle along folding lines 7, 7' to form bottom parts Y, Y' of the body C. The bottom portions Y and Y' are integrally joined by a fitting material 8. The notches 10 and 10' are for fitting and bonding the main wing and the tail to integrate with the body C, respectively. 11 is the engine, 12 is the cutout of the transparent part for the cockpit, 12' is the transparent body of the control part, 1
4 is a propeller.

FIG. 4 is a diagram showing the assembly process same as above. Figure a shows the assembly B turned upside down, and the bent portion is provided with folding lines 7 and 7' having a V-shaped cross section.
Figure b shows the fuselage side part X on the back side of the assembly C,
A frame member 16 (side shells 15, 15' and wood trims 9, 9') made of balsa wood or the like is bonded to X' with adhesive. Figure c shows assembly B bent at folding lines 7 and 7', and the side bodies 15 and 15' integrated at wooden lines 9 and 9', and the frame D is placed inside assembly B. The figure shows the formation of the . FIG. 4 is a completed view of the fuselage C. Incidentally, after the assembly B is bent, the wood grain 9a may be replenished as appropriate.

As described above, in the present invention, an assembly is formed by cutting the entire assembly board along the printing paper, and then a frame member is attached to the back side of this assembly, and then the assembly is cut as appropriate. At the same time as the assembly is assembled by bending it into a shape and gluing the necessary parts, the frame of the aircraft is formed using the frame members within the assembly, so when assembling the assembly, the frame members are also assembled three-dimensionally. Therefore, it is possible to save the effort of separately assembling the frame members and to simplify the manufacturing process.

From one side. An assembly in which printed paper with an appropriate pattern printed on it is pasted on the surface of a synthetic resin board, a protective transparent film is laminated on the surface of the printed paper, and reinforcing paper is pasted on the back side of the foamed synthetic resin board. Since a plate is used, the assembly itself has better shape retention than the conventional film used as the outer cover.
Therefore, the positioning of the frame members in the assembled state is done by the assembly at the same time as the assembly is assembled, and very skillful assembly work is not required. Compared to the above, it is not necessary to use a holding hand cut exclusively for the frame members, and assembly accuracy can be improved. Furthermore, since the assembly and the frame members can be assembled at the same time, there is no need to allow time for the adhesive bonded to the frame members to develop its strength, resulting in an effect that the manufacturing time can be shortened. Furthermore, the assembly and the frame member can be bonded together in a flat state, which facilitates the bonding work and prevents the assembly and the frame member from shifting.

In addition, the assembly has reinforcing paper glued to both sides of the foamed synthetic resin board, so it can of course withstand shocks, and by making the foamed synthetic resin board 4 to 5 mm thick, it can be used for model airplanes. It can absorb engine vibrations, has a noise-muffling effect, and improves flight stability.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the assembly board used in the manufacturing method of the present invention, Figure 2 is a plan view of the same assembly board printed for punching, Figure 3 is a completed view of the fuselage of the same airplane, and Figure 4 is Figures a, b, and c are diagrams showing the manufacturing process of the same. 1... Foamed synthetic resin board, 2... Printing paper, 3...
Synthetic resin film, 4... Reinforcement paper, 16... Frame member, A... Assembly board, B... Assembly.

Claims (1)

[Claims] 1 Paste printed paper with an appropriate pattern printed on the surface of a foamed synthetic resin board, further laminate a protective transparent film on the surface of the printed paper, and paste reinforcing paper on the back side of the foamed synthetic resin board. Using the assembled board, first cut the entire assembled board along the printing on the printing paper to form an assembly, then adhere the frame members to the back of this assembly, and then cut the assembly as appropriate. A method for manufacturing a radio-controlled model airplane, characterized by assembling an assembly by bending it into a shape and gluing necessary parts, and at the same time forming a frame of an aircraft body using frame members within the assembly.