JP3050018U - Cylinder block having a spiral groove - Google Patents

Abstract

(57) [Summary] [Object] To easily provide a cylinder having a spiral shaped routing that has been extremely rarely employed due to difficulties in processing and poor precision. [Structure] A cylindrical column is divided in the vertical and circumferential directions, and three-dimensional processing is performed by a numerically controlled machine tool on a spiral routing that is patterned so that each divided block has the same shape. The combination of the blocks completes a cylinder having a spiral routing.

Description

[Detailed description of the invention]

[0001]

[Problems to be solved by the invention]

 Since ancient times, there are endless examples of cutting out stone and building a cylinder. It is also widely used in modern buildings. Many of them have a circular surface as they are, but there are also many ornaments that have arc-shaped grooves called furing. FIG. 1 shows an example of the routing. Although the cross-sectional shape and number of the grooves differ depending on each building, the directions are absolutely large and parallel to the cylinder, that is, the vertical direction. A spiral routing can be considered in terms of design, but there are few examples of its use for the following two reasons. The first reason is processing difficulty. Cylinders used in buildings today have strong decorative elements, and most of them are usually divided and processed, and then wound around foundation pillars. Machining is facilitated by the division, but it is not easy to machine grooves with a constant cross section on a curved surface, and the number of man-hours is several times greater than that of a cylinder having ordinary vertical routing, and the cost is increased accordingly. Becomes The second reason is the problem of product accuracy. In the case of the conventional hand-made method, the processing accuracy is rough, and it is extremely difficult to make the cross-sectional shape and the spiral shape of the routing uniform, thereby significantly reducing the commercial value.

[0002]

[Means for Solving the Problems]

 In this invention, in order to solve the above-mentioned problem, a cylinder is divided into a vertical shape and a circumferential direction from a form of a finished product, and is patterned so that all blocks have the same shape. When analyzing the patterned spiral shape, the trajectory of the arc center of the cross section is a three-dimensional curve based on a certain rule. By programming the analyzed mathematical formulas and using the program, it is possible to easily carry out spiral machining on the cylindrical surface with a numerically controlled milling machine or similar machine.

[0003]

[Effect of the Invention] By using the block according to the invention, a cylinder having a spiral-shaped routing that has been rarely adopted while being conventionally evaluated in terms of design can be manufactured with high precision, easily, and at low cost. Now you can produce. By changing the pattern of the block in various ways, the shape of the routing groove, the gradient of the spiral, the number of turns, and the diameter of the cylinder are arbitrary, and the height is infinite. Also, by changing the same program, it is possible to easily process a single-ended design with a single routing used for the upper and lower ends of the pillar. Furthermore, by stopping both ends of the routing, it is possible to easily process a design that can be used in various ways.

[Brief description of the drawings]

FIG. 1 is an example of a cylinder having a vertical routing and a sectional view thereof.

FIG. 2 is an example of dividing a cylinder having 24 spiral routings into three equal parts in the vertical direction and six equal parts in the circumferential direction.

3A and 3B are a plan view and a sectional view of a divided block shown in FIG.

FIG. 4 is an example of a cylinder to which a routing is fixed.

FIG. 5 is a plan view and a cross-sectional view of a block obtained by dividing a cylinder to which a routing is fixed;

FIG. 6 is a design in which both routings are stopped.

FIG. 7 is a plan view and a cross-sectional view of a divided block of a design having both ends routed.

[Explanation of symbols]

 1 Cross section shape of routing 2 Divided block 3 Spiral shape

Claims (3)

[Utility model registration claims] 1. A natural stone material in which a groove having an arc having an arbitrary depth and diameter is machined by a numerically controlled machine tool in a spiral locus. 2. An artificial stone material in which a groove having an arc of a given depth and diameter is machined by a numerically controlled machine tool, drawing a spiral trajectory. 3. A ceramic material in which a groove having a circular cross section having an arc of an arbitrary depth and diameter is formed by a mold manufactured by a numerically controlled machine tool.