JPS6224185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for assembling a cylindrical frustoconical structure, such as a stern nozzle, which is installed near the periphery of a screw in the stern of a ship, among other conical structures.

Conventionally, a cylindrical truncated conical structure has been formed by, for example, two halves that are formed using a press machine or the like and then joined together.

It has been difficult to obtain high precision in the conical structures that can be manufactured by the above-mentioned conventional methods.

For example, the stern nozzle is placed near the periphery of the screw and improves the propulsion performance of the vessel by the water flow flowing along its surface.The wide open end located at the front in the bow and stern direction is perpendicular to the axis. It is cut on an inclined surface that is different from the normal plane, and the cross-sectional shape of the shell portion is wing-like, requiring extremely high precision.

An object of the present invention is to provide a method and apparatus for assembling a cylindrical truncated conical structure with high precision and efficiency in an inverted position with reference to the outer peripheral surface and the truncated head. It is in.

In order to achieve the above object, the present invention has a plurality of columns erected on a circumference centered on a vertical axis, and the upper and lower ends are attached to the columns via adjustment screws on the axis side. Adjust the position of the rod-shaped movable receiving jigs so that their inner edges can support them along the outer periphery of the cylindrical truncated conical structure in an inverted position, and place the movable receiving jigs at the upper and lower ends of the movable receiving jigs. An upper circular ring and a lower circular ring are respectively attached to integrally fix all the movable receiving jigs, and the truncated head of the cylindrical truncated conical structure in an inverted position is supported by the upper ring. This is a method of assembling a conical structure by joining the outer surface material, aggregate, and inner surface material in this order, and multiple supports are erected at predetermined intervals on the circumference of the vertical axis of the floor surface. A rod-shaped movable jig is provided on the vertical axis side of the column, the upper end and the lower end of which are attached to the column via adjustment screws, and which can move toward and away from the vertical axis. The receiving jig is inclined inward toward the bottom, and its inner edge is configured to be able to support along the outer periphery of the cylindrical truncated conical structure in an inverted position, and the upper end of the movable receiving jig is An upper circular ring is provided for connecting and fixing, the lower end portions of the movable receiving jig are respectively connected and fixed, and a lower circular ring is provided for supporting the truncated head of the conical structure. be.

According to the above method and apparatus, a cylindrical truncated conical structure in an inverted position is supported at its outer periphery by the inner edge of a plurality of rod-shaped movable support jigs with its outer periphery and truncated part as a reference. In addition, since the truncated head is supported and assembled by the lower circular ring that fixes the movable pedestal, the cylindrical truncated conical structure can be assembled efficiently with high precision.

An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes, for example, eight pillars erected on a fixed surface plate 18 at equal intervals on a circumference centered on the vertical axis 0, and each of the lower parts of these pillars 1 has a vertical axis 0. The rail 2 heading toward is connected. 4 is a rod-shaped movable receiving jig arranged on the vertical axis 0 side of the column 1, and its upper and lower ends are connected to the column 1 via upper and lower adjustment screws 5 and 6; The lower end portion is placed on the rail 2 via the roller 3, and is configured to be able to move toward and away from the vertical axis 0. At the connecting portion of the upper end of this movable receiving jig 4, the tip of the upper adjustment screw 5 that is screwed into the support column 1 has a connecting portion 1 that is rotatably connected around the axis.
As shown in FIG. 3, a roller 8 is provided at the tip of the rod 9 to fit into a groove 7 formed along the length of the movable receiving jig 4. . In addition, at the connecting portion of the lower end of the movable jig 4, a rod 12 is connected to the tip of the lower adjustment screw 6 that is screwed into the support column 1 via a connecting portion 13 that is rotatably connected around the axis. The tip of the rod 12 is connected to the movable receiving jig 4 via the pin 11.
is connected to the lower end of the Each of these movable receiving jigs 4 is arranged in an inclined manner closer to the vertical axis 0 as it goes downward, and by adjusting the distance of each movable receiving jig 4 from the vertical axis 0, the movable receiving jig 4 can be It becomes possible for the inner edge 4a to support the outer periphery of the conical structure in an inverted position.

Reference numerals 14 and 15 denote an upper circular ring and a lower circular ring that connect the upper end and lower end of the movable receiving jig 4, respectively, which are respectively connected to the inner side of the upper end surface and the lower end after position adjustment, and are connected to the inside of each movable receiving jig. To prevent all the movable receiving jigs 4 from wobbling and to integrally fix all the movable receiving jigs 4.

Reference numeral 16 denotes a stern nozzle assembled with this device, which has a cylindrical frustoconical shape consisting of an outer surface material 16a, an aggregate 16b, and an inner surface material 16c. The material 16a is supported,
It is assembled in an inverted position with one end (the truncated head) facing downward. Further, one end (truncated head) of this stern nozzle 16 is fixed and supported by the lower circular ring 15, and the other end of this stern nozzle 16 is attached to a shape provided on the inner edge of the movable receiving jig 4. 17. The lower circular ring 15 is removed from the movable receiving jig 4 at the same time as the nozzle 16 is removed from the movable receiving jig 4, and is fixed to the nozzle 8 until the nozzle 1 is attached to the stern of the ship. 16 is kept in shape.

The assembly accuracy of the nozzle 16 can be easily measured using a plumb bob.
On the top, marks 19 are placed concentrically and radially from the axis 0.

Next, a method for assembling the stern nozzle 16 using this device will be explained.

First, the inner edge of each movable support jig 4 is set so that it can be supported along the outer periphery of the stern nozzle 16 in an inverted position, that is, a position with one end (truncated head) positioned downward. The upper screw shaft 5 and the lower screw shaft 6
Adjust by. Next, the upper circular ring 14 and the lower circular ring 15 are fixed to the upper and lower ends of the movable receiving jig 4, respectively. Next, one end (truncated head) of the stern nozzle 16 is supported by the lower circular ring 15, and the stern nozzle 16 is moved along the inner edge of the movable support jig 4 from the outer surface material 16a to the aggregate 16b. The inner surface material 16c is joined and assembled in this order.

Stern nozzle 16 assembled and precision adjusted
is removed from the movable support jig with the lower circular ring 15 still attached to one end, attached to the hull near the stern screw, and then the lower circular ring 1
5 is removed.

As described above, according to the present invention, a cylindrical truncated conical structure is assembled in an inverted position with its truncated head supported by the lower conical ring and its outer peripheral part supported by the inner edge of the movable support jig. Therefore, not only the above-mentioned stern nozzle but also other conical structures can be assembled, and the assembly work can be performed with high precision and efficiency. In particular, according to the present invention, by adjusting the inclination of the movable receiving jig using an adjustment screw, a conical structure having a desired opening angle can be assembled easily and accurately.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention.
The figure is a schematic perspective view, Figure 2 is an enlarged partial cutaway view of the main part,
FIG. 3 is a view taken along the X arrow in FIG. 0... Vertical axis, 1... Support column, 4... Movable receiving jig, 4
a...Inner edge, 5...Upper adjustment screw, 6...Lower adjustment screw, 14...Upper circular ring, 15...Lower circular ring, 16...Stern nozzle, 16a...Outer surface plate, 16
b... aggregate, 16c... inner surface board.

Claims (1)

[Scope of Claims] 1. A movable rod-shaped rod whose upper and lower ends are attached to the pillars via adjustment screws on the axis side of a plurality of pillars erected on a circumference centered on a vertical axis. The position of the receiving jig is adjusted so that its inner edge can be supported along the outer periphery of the cylindrical truncated conical structure in an inverted position, and upper circular rings are attached to the upper and lower ends of the movable receiving jig, respectively. and a lower circular ring are attached to integrally fix all the movable support jigs, the truncated head of the cylindrical truncated conical structure in an inverted position is supported by the upper ring, and this conical structure is A method for assembling a conical structure, characterized by assembling an outer surface material, aggregate, and inner surface material in this order. 2. A plurality of columns are erected at predetermined intervals on the circumference of the vertical axis of the floor surface, and the upper and lower ends of the columns are attached to the columns via adjustment screws on the vertical axis side. , a rod-shaped movable receiving jig that can approach and move away from the vertical axis is provided, and this movable receiving jig is inclined inward toward the bottom, and its inner edge has a cylindrical truncated conical structure in an inverted position. An upper circular ring configured to be supportable along the outer periphery of the object and connecting and fixing the upper ends of the movable holders, respectively connecting and fixing the lower ends of the movable holders, and An apparatus for assembling a conical structure, characterized in that a lower circular ring is provided to support the truncated head of the conical structure.