JPH0321349Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a side stringer suitable for holding the sides of a pair of bottom plates laid as the bottom of a rubber boat, etc., and retaining the shape of a plurality of bottom plates. .

(Prior art) This type of bottom plate shape retainer, ie, side stringer,
No. 16668, West German Patent No. 1103800, West German Patent No. 948487
It has been known for a long time, as seen in French Patent No. 1,155,376, etc., and has a rod-shaped structure with a recess into which at least the side of the bottom plate fits.

(Problem to be solved by the invention) However, when using such a conventional side stringer, especially when receiving strong water pressure while driving, the end of the side stringer 1 as shown in FIG. A crack 10 is placed on the bottom plate 5 located at
There was a problem that it was easy to enter. As a solution to this problem, reinforcing materials 11, etc. were separately installed in the bottom plate parts where cracks easily enter, but this resulted in inconveniences such as a reduction in the effective space inside the boat, a deterioration in appearance, and an increase in cost. was desired.

The present invention has been developed in view of the above circumstances, and has a side stringer structure that eliminates the need for further reinforcing the bottom plate with a separate member, and prevents the occurrence of cracks in the bottom plate without reducing the effective space inside the boat. The purpose is to provide

(Means for Solving the Problem) The side stringer of the bottom plate for an air boat of the present invention connects and integrates the upper frame and the lower frame to form a recess, and the lower surface of the upper frame and the upper surface of the lower frame In the side stringers that clamp the sides of the combination bottom plate, the edges of the upper frame and the lower frame are arranged so that the lower surface of the upper frame and the longitudinal ends of the upper surface of the lower frame are not located on the same vertical line. It is characterized by having at least one end edge cut out.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Side stringers 1 made of a hard and rigid material such as hard wood or aluminum are fitted into the sides of the plurality of combined bottom plates 5. (Fig. 1) Fig. 2 shows an enlarged view of the main part, the end of the side stringer 1, which is the edge of the upper frame 7 and lower frame 8 that sandwich the bottom plate side part 6. Only the lower frame edge 3 is cut out diagonally with respect to the center direction of the bottom plate so that the upper frame edge 2 and the lower frame edge 3 are not located on the same vertical line 4.

The present invention is not limited to this, the upper frame end edge 2 may be cut out, and the shape of the cutout may be arbitrary.
As shown in FIG. 3, it may be cut out in a rounded shape. In addition, as a means for preventing the upper frame edge portion 2 and the upper frame edge portion 3 from being located on the same vertical line, the upper frame 7
The frame lengths of the lower frame 8 in the longitudinal direction may be made different from each other.

(Function) In the side stringer of the present invention, since the edge of the upper frame and the edge of the lower frame are not located on the same vertical line, both ends of the conventional upper and lower frames shown in Fig. 4 are aligned vertically. Upper frame end edge 2 located on the same vertical line 4 like a cut-shaped side stringer 1
Because of the lower frame edge 3, the fulcrum 9 on which force is concentrated is not reliably formed at that portion, and the applied force is dispersed.

(Effects of the invention) According to the side stringer of the invention as described above, there is no need to specially reinforce the bottom plate of the airboat, there is no reduction in the effective space inside the airboat, and there are no problems with the appearance. This has the advantage of being able to prevent the occurrence of cracks in the bottom plate without causing any damage.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional perspective view of the main part of Fig. 1, Fig. 3 is a plan view showing another embodiment of the invention, and Fig. 4. , 5th
The figures are a cross-sectional perspective view and a partially cutaway perspective view, respectively, showing a conventional example. DESCRIPTION OF SYMBOLS 1...Side stringer, 2...Upper frame edge, 3...Lower frame edge, 4...Plumb line, 5...Bottom plate, 6...Bottom plate side part, 7...Upper frame, 8... ...bottom frame,
9...Fully point, 10...Crack, 11...Reinforcement material.

Claims (1)

[Scope of utility model registration request] The upper frame and the lower frame are connected and integrated to form a recess,
In the side stringer that clamps the side part of the combination bottom plate between the lower surface of the upper frame and the upper surface of the lower frame, the lower surface of the upper frame and the upper surface of the lower frame are arranged so that both longitudinal ends thereof are not located on the same vertical line. A side stringer of a bottom plate for an air boat, characterized in that at least one edge of an upper frame edge and a lower frame edge is cut out.