JPS592676B2 - Longi frame mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a longitudinal frame mounting structure.

Generally, the outer skin of a ship consists of a special three-dimensional curved surface.
A longitudinal frame is attached to its inner surface.

However, since the outer panel has a complicated curved surface as described above, this longitudinal frame has a complicated three-dimensional curved surface.

That is, as shown in FIG. 1, the outer panel 4 formed by welding and connecting several curved plates 1 to 3 has a complicated curved surface, and each curved plate 1 to
A longitudinal frame 5 is fixed to each of the longitudinal frames 3 and 3, but if these longitudinal frames are simply attached in a continuous state, the longitudinal frames 5 will be fixed as shown in FIG. 2A.

As shown in B, the longitudinal frame 5 itself becomes a twisted three-dimensional oil surface.

Since the adjacent connecting surfaces 6 are formed on the twisted three-dimensional curved surface, the machining accuracy is poor, and there is a problem in attaching such a longitudinal frame to a curved plate.

Furthermore, the longitudinal frame must be separately machined as having a three-dimensional curved surface as described above, which has the drawback of poor processing accuracy and easy deformation after processing.

The present invention was made to eliminate the above-mentioned drawbacks, and by forming the longitudinal frame to fit within a plane that has a certain relationship with the curved plate, complicated three-dimensional curved surface processing is not required. This provides a structure with a longitudinal frame.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 3 illustrates one embodiment of the present invention.

In the figure, the same parts as in FIG. 1 are designated by the same reference numerals.

In the figure, the surfaces indicated by symbols γ to 9 are curved plates 1 to 3, respectively.
The longitudinal frame attachment of is a plane containing the normal to each curved plate at some point within the position.

Therefore, although these planes 7 to 9 have different inclinations as a whole depending on the curvature of each curved plate, adjacent planes 7 to 9 always have an intersection line 10.

11 is a longitudinal frame that forms the main part of the present invention, and these longitudinal frames are made of the planes 7 to 7 described above.
It is formed to fit within the plane of 9.

That is, the longitudinal frame 11 is bent only in its longitudinal direction with the same ratio as each of the curved plates 1 to 3, and there is no twisting at all.

That is, as shown in FIGS. 4A and 4B, it has a structure that is curved only in the longitudinal direction within one plane.

The connecting portions 12 of adjacent longitudinal frames 11 are bent surfaces, but this connecting portion 12 is determined as being on the intersection line 10 of the planes 7 to 9 described above.

As is clear from the above explanation, according to the present invention, the longitudinal frame is formed to fit within a plane that includes the normal line passing through the mounting position to the curved plate, so the excellent effects described below can be expected. can.

(1) Since the longitudinal frame has a curved shape only in the longitudinal direction, bending is extremely easy, and processing accuracy is dramatically improved.

(2) Since the longitudinal frame does not form a three-dimensional curved surface, it is easy to handle during transportation and storage, does not deform, and occupies less space. (3) The connecting surfaces of adjacent longitudinal frames are curved. Calculated assuming that it is located on the intersection line of the plane that includes the normal to the longitudinal frame mounting position of the face plate.

The connection is made accurately due to the processing accuracy of the longitudinal frame mentioned above (1), and errors during installation are drastically reduced.

(4) Only the connecting portions of each longitudinal frame are not in the same plane, but each other than the connecting portions is in a single plane, so unlike the conventional longitudinal frame, twisting does not cause a decrease in strength over the entire surface.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional attachment method, FIGS. 2A and B are a side view and a plan view of a conventional longitudinal frame, and FIG. 3 is a perspective view illustrating an embodiment of the present invention. 4A and 4B are a side view and a plan view of the longitudinal frame according to the present invention. 7...Plane, 10...Intersection line, 11...
...Longi frame, 12...Connection part.

Claims (1)

[Claims] 1 A longitudinal frame of a curved board is formed by being bent in the longitudinal direction so as to fit within a plane containing the normal line set at the position where the longitudinal frame is attached, and the connecting parts of this longitudinal frame are adjacent to each other. A mounting structure for a longitudinal frame, characterized in that it is configured to be located on an intersection line of planes containing the longitudinal frame.