JP2016035166A - Steel-pipe column and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel-pipe column which enables a planar part to be easily formed in a cylindrical steel pipe and which has the planar part formed to have almost the same plate thickness as a thickness of a steel-pipe column body, and also provide a method of manufacturing the steel-pipe column.SOLUTION: In a steel-pipe column 10 comprising a cylindrical steel-pipe column body 11, an abutting part 12 for abutting on an end of a beam material 20 is formed by press molding in a longitudinal direction of the cylindrical steel-pipe column body 11 and at least one of circumferential directions of the cylindrical steel-pipe column body 11. The abutting part 12 is formed in a planar shape while having almost the same plate thickness as a thickness of the cylindrical steel-pipe column body 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steel pipe column composed of a cylindrical steel pipe and a manufacturing method thereof.

  Conventionally, cylindrical steel pipes have been used as building pillars and the like. And the joining structure of the steel pipe pillar and beam material which joined the beam material to the outer peripheral surface of a cylindrical steel pipe is known.

  However, in the joining structure of a steel pipe column composed of a cylindrical steel pipe and a beam material, since the outer peripheral surface of the steel pipe column is a cylindrical surface, the beam material is used to join the beam material to the steel pipe column. There is a problem in that the end of the tube must be processed into an arc shape in accordance with the shape of the cylindrical surface of the steel pipe column.

  Therefore, in order to solve this problem, a steel pipe column having a portion formed in a planar shape in at least one place in the longitudinal direction of a cylindrical steel pipe has been proposed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-317085

  However, in the steel pipe pillar of patent document 1, since the plate | board thickness of the part formed in the planar shape is shape | molded thicker than the board thickness of a steel pipe main body, there existed a problem that steel pipe pillar itself became heavy. Moreover, in the steel pipe pillar of patent document 1, since the planar part was formed by heating and cooling a cylindrical steel pipe, there also existed a problem that a manufacturing method became complicated.

  Therefore, the present invention provides a steel pipe column in which a planar portion can be easily formed in a cylindrical steel pipe, and the planar portion is formed to have the same thickness as the plate thickness of the steel pipe column main body, and a manufacturing method thereof. Objective.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the steel pipe column according to claim 1 of the present invention is a steel pipe column constituted by a cylindrical steel pipe, and is arranged in the longitudinal direction of the cylindrical steel pipe and in the circumferential direction of the cylindrical steel pipe. A contact portion for contacting the end of the beam in at least one direction is formed by press molding, and the contact portion is formed in a flat shape while maintaining the same thickness as the cylindrical steel pipe. It is what is done.

  In the said structure, a planar contact part is formed in the predetermined position of a steel pipe pillar main body. Further, the contact portion (planar portion) is formed with a plate thickness comparable to that of a cylindrical steel pipe (steel pipe body).

  The invention according to claim 2 is a manufacturing method for manufacturing the steel pipe column according to claim 1, wherein the pressing range on the outer peripheral surface of the cylindrical steel pipe is gradually increased in the circumferential direction of the cylindrical steel pipe. The abutting portion is formed by pressing the outer peripheral surface of the cylindrical steel pipe while spreading it.

  In the above configuration, it is possible to form an abutting portion (planar portion) having a plate thickness comparable to that of a cylindrical steel pipe (steel pipe main body) only by performing press molding.

  Furthermore, invention of Claim 3 is a manufacturing method of the steel pipe pillar of Claim 2, Comprising: The press means which presses the outer peripheral surface of the said cylindrical steel pipe, and the range which the said press means presses is adjusted And the pressure adjusting means to be disposed in a portion of the cylindrical steel pipe where the contact portion is formed, and the contact adjusting portion is formed by gradually expanding a range pressed by the pressing means by the pressure adjusting means. Is.

  In the above configuration, it is possible to form an abutting portion (planar portion) having a plate thickness comparable to that of a cylindrical steel pipe (steel pipe main body) only by performing press molding.

  Furthermore, the invention according to claim 4 is the method of manufacturing a steel pipe column according to claim 2, wherein the abutting portion is formed in the cylindrical steel pipe by pressing means for pressing the outer peripheral surface of the cylindrical steel pipe. The pressing means is configured to be able to change the shape of the surface that presses the outer peripheral surface of the cylindrical steel pipe, and the pressing means presses while changing the shape of the surface of the pressing means. The contact portion is formed by gradually spreading the contact portion.

  In the above configuration, it is possible to form an abutting portion (planar portion) having a plate thickness comparable to that of a cylindrical steel pipe (steel pipe main body) only by performing press molding.

  According to the steel pipe column of the present invention, since the contact portion (planar portion) having the same thickness as that of the cylindrical steel pipe (steel pipe main body) can be formed, the weight of the steel pipe column itself can be reduced. it can.

  According to the method for manufacturing a steel pipe column of the present invention, a contact portion (planar portion) can be formed on a cylindrical steel pipe (steel pipe main body) only by performing press molding. The contact portion (planar portion) can be easily formed. Moreover, when forming the contact part (planar part), it is not necessary to heat and cool the steel pipe, so that the manufacturing method itself can be simplified.

(A) is a perspective view of the steel pipe pillar which concerns on this invention, (b) is sectional drawing of the contact part vicinity of the steel pipe pillar which concerns on this invention. The schematic side sectional drawing of the manufacturing apparatus for manufacturing the steel pipe pillar which concerns on this invention. The schematic front sectional drawing of the manufacturing apparatus for manufacturing the steel pipe pillar which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows 1st Example for manufacturing the steel pipe pillar which concerns on this invention. Schematic which shows 2nd Example for manufacturing the steel pipe pillar which concerns on this invention.

Embodiments of the present invention will be described below with reference to the drawings.
First, the steel pipe pillar 10 of this invention is demonstrated using FIG.

  As shown in FIG. 1 (a), a steel pipe column 10 according to the present invention includes a steel pipe column main body 11 and a contact portion 12.

  The steel pipe column main body 11 is formed of a cylindrical steel pipe having a predetermined length. The material, plate thickness, etc. of the steel pipe column main body 11 are not particularly limited, but may be any cylindrical steel pipe having a material, plate thickness, etc. that can be used as a column material.

The contact part 12 is a part which joins the beam material 20 in the steel pipe column main body 11, and is a planar part formed in the multiple places (FIG. 1 (a) 2 places) of the steel pipe column main body 11. FIG. The abutting portion 12 is composed of four planar portions 12 a formed in four directions in the circumferential direction of the steel pipe column main body 11 in the longitudinal direction of the steel pipe column main body 11. In addition, the contact part 12 is not limited to what is comprised from the four plane parts 12a, but the contact part 12 (plane part 12a) exists in at least one direction of the circumferential direction of the steel pipe column main body 11. FIG. It does not matter as long as it is formed.
The flat surface portion 12a of the contact portion 12 is formed with an area to which the end surface of the beam member 20 can be joined.
Moreover, as shown in FIG.1 (b), the plate | board thickness of the contact part 12 (plane part 12a) is formed by the plate | board thickness comparable as the steel pipe column main body 11. As shown in FIG. The contact portion 12 (plane portion 12a) is formed in a state where it is pushed inward with respect to the steel pipe column body 11.

  Thus, by forming the flat contact portion 12 at a predetermined position of the steel pipe column main body 11, the end of the beam member 20 is processed into an arc shape in accordance with the shape of the cylindrical surface of the steel pipe column main body 11. The beam member 20 can be joined to the steel pipe column 10. Moreover, since the plate | board thickness of the contact part 12 (plane part 12a) is formed by the plate | board thickness comparable as the steel pipe pillar main body 11, steel pipe pillar 10 itself can be reduced in weight.

  Next, the manufacturing method (1st Example) of the steel pipe pillar 10 is demonstrated using FIGS. 2-4.

  As shown in FIG. 2, first, the both ends of the steel pipe column main body 11 in the steel pipe column 10 are fixed at fixed positions by the first fixing means 31 and 31. As shown in FIGS. 2 and 3, a portion where the beam member 20 (FIG. 1) is joined in the steel pipe column main body 11, that is, a portion where the contact portion 12 (plane portion 12 a) is formed is the second fixing means 32. To fix. At this time, the 2nd fixing means 32 fixes the outer peripheral surface of the left-right direction of the steel pipe column main body 11. FIG. Furthermore, the outer peripheral surface of the vertical direction of the steel pipe column main body 11 is fixed from the left-right direction of the steel pipe column main body 11 with the metal mold | die 40 (an example of a "press adjustment means").

  Here, the mold 40 is composed of a pair of molds so as to sandwich the steel pipe column main body 11 from the left-right direction, and is disposed on the upper and lower portions of the steel pipe column main body 11 when fixed by the second fixing member 32. . The mold 40 includes a plurality (two in FIG. 3) of mold members 41 and 42. The mold members 41 and 42 are composed of a pair of mold members so as to sandwich the upper part (or lower part) of the steel pipe column main body 11 from the left-right direction. The first mold member 41 is provided above the second mold member 42 as a member independent of the second mold member 42. The mold members 41 and 42 are configured so that the outer peripheral surface in the vertical direction of the steel pipe column main body 11 can be fixed from the left and right direction of the steel pipe column main body 11 and can be moved independently of each other in the left and right direction of the steel pipe column main body 11 Configured.

  In the steel pipe column 10, the contact part 12 (plane part 12a) is formed by pressing the outer peripheral surface of the steel pipe column main body 11 from the up-down direction by the pressing means 33.

  Here, when the contact part 12 (plane part 12a) is formed in the state which fixed the outer peripheral surface of the left-right direction of the steel pipe column main body 11 only with the 2nd fixing means 32 (pressing means 33 without arrange | positioning the metal mold | die 40). ), The outer peripheral surface of the steel pipe column main body 11 is pressed unevenly by the pressing means 33. In particular, the central portion of the flat portion 12a of the contact portion 12 is recessed inward of the steel pipe column main body 11, and the flatness of the flat portion 12a is deteriorated.

  Therefore, in the method of manufacturing the steel pipe column 10, while the pressing means 33 presses the outer peripheral surface of the steel pipe column main body 11 gradually (in steps) in the circumferential direction of the steel pipe column main body 11, 11 is pressed to form the contact portion 12 (planar portion 12a). Specifically, this is performed as follows.

  As shown in FIG. 4A, the steel pipe column main body 11 is arranged so that a part (top) of the upper and lower parts of the steel pipe column main body 11 protrudes from the mold 40. Then, as shown in FIG. 4B, a part of the steel pipe column main body 11 protruding with respect to the mold 40 is pressed by the pressing means 33. At this time, a part of the steel pipe column body 11 is pressed so as to be flush with the upper surface (or lower surface) of the first mold member 41, and only the pressed portion is formed into a flat shape.

  When a part of the steel pipe column main body 11 is pressed as described above, the first mold member 41 is separated (moved) from the steel pipe column main body 11 as shown in FIG. Thereby, the pressing range in which the pressing means 33 presses the outer peripheral surface of the steel pipe column main body 11 extends in the circumferential direction of the steel pipe column main body 11. Then, as shown in FIG. 4D, a part of the steel pipe column main body 11 protruding with respect to the second mold member 42 is pressed again by the pressing means 33. At this time, a part of the steel pipe column main body 11 is pressed so as to be flush with the upper surface (or lower surface) of the second mold member 42, and only the pressed portion is formed into a flat shape.

  When a part of the steel pipe column main body 11 is pressed as described above, the second mold member 42 is separated (moved) from the steel pipe column main body 11 as shown in FIG. Thereby, the press range which the press means 33 presses the outer peripheral surface of the steel pipe column main body 11 further spreads in the circumferential direction of the steel pipe column main body 11. Then, as shown in FIG. 4 (f), a part of the steel pipe column main body 11 protruding with respect to the second fixing means 32 is pressed again by the pressing means 33. At this time, a part of the steel pipe column main body 11 is pressed so as to be flush with the upper surface (or lower surface) of the second fixing means 32. And the contact part 12 (plane part 12a) is formed in the predetermined position of the steel pipe pillar main body 11. FIG.

  As described above, the pressing range in which the pressing means presses the outer peripheral surface of the steel pipe column main body 11 in the circumferential direction of the steel pipe column main body 11 by separating (moving) the mold 40 from the steel pipe column main body 11 stepwise. It spreads gradually (in stages). As a result, the outer peripheral surface of the steel pipe column main body 11 is gradually (stepwise) pressed by the pressing means 33, and the outer peripheral surface of the steel pipe column main body 11 is pressed evenly and flattened substantially uniformly (flatness) The contact portion 12 (planar portion 12a) is formed.

  Moreover, in the said method, the outer peripheral surface of the steel pipe column main body 11 is only pressed by the press means 33. FIG. That is, the contact part 12 (plane part 12a) is formed only by press molding. Therefore, the contact part 12 (plane part 12a) can be easily formed in the steel pipe column main body 11 (since the heating process and the cooling process are not required, the manufacturing method itself of the steel pipe column 10 is simplified).

  In addition, the said method is a method of forming the contact part 12 (plane part 12a) in the two directions of the steel pipe column main body 11. FIG. Therefore, in order to form the remaining two contact portions 12 (plane portion 12a), in FIG. 4 (f), the fixing by the second fixing means 32 is once released, and the steel pipe column main body 11 is rotated by 90 degrees. After that, the operation of FIGS. 4A to 4F is performed again.

  In the above method, the abutting portion 12 (planar portion 12a) is formed simultaneously on both sides of the steel pipe column main body 11. However, the method is not limited to this, and only one of the steel pipe column main bodies 11 is applied. It is good also as a structure which forms the contact part 12 (plane part 12a), or the structure which forms the contact part 12 (plane part 12a) simultaneously in the four directions of the steel pipe column main body 11. FIG.

  Furthermore, in the above method, the mold 40 is configured by two mold members 41 and 42, but is not limited to this, and is configured by three or more mold members. It doesn't matter.

  Furthermore, in the above method, the pressing means 33 gradually expands the pressing range in which the pressing means 33 presses the outer peripheral surface of the steel pipe column main body 11 by moving the mold 40 stepwise, but the method is limited to this. Instead, the mold 40 may be moved steplessly (continuously) in accordance with the pressing speed of the pressing means 33.

  Next, another embodiment (second embodiment) in the method for manufacturing the steel pipe column 10 will be described with reference to FIG.

  In another embodiment, as in the first embodiment, both ends of the steel pipe column main body 11 in the steel pipe column 10 are fixed in place by the first fixing means 31 and 31 (see FIG. 2), and the steel pipe column main body 11 is fixed. , The portion forming the contact portion 12 (planar portion 12a) is pressed by the pressing means 50 from the vertical direction of the steel pipe column body 11.

  Here, the pressing means 50 is comprised by a pair of pressing member so that the steel pipe column main body 11 may be clamped from an up-down direction. Moreover, the pressing means 50 is comprised by multiple types (3 types in FIG. 5) pressing member 51 * 52 * 53. The pressing members 51, 52, and 53 have different shapes of the surfaces 51a, 52a, and 53a that press the outer peripheral surface of the steel pipe column main body 11, respectively. Specifically, the areas of the planar portions of the surfaces 51a, 52a, and 53a are different. The area of the plane portion on the surface 51a of the first pressing member 51 is the smallest, and the area of the plane portion on the surface 53a of the third pressing member 53 is the largest. That is, the area of the flat surface portion that presses the outer peripheral surface of the steel pipe column main body 11 is narrowest in the first pressing member 51 and widest in the third pressing member 53.

  In another embodiment, the configuration of the pressing member in the pressing means 50 is changed to each of the pressing members 51, 52, and 53. That is, the shape of the surfaces 51 a, 52 a, and 53 a that press the outer peripheral surface of the steel pipe column main body 11 in the pressing means 50 is changed. Thereby, the range which presses the outer peripheral surface of the steel pipe column main body 11 by the press means 50 gradually spreads in the circumferential direction of the steel pipe column main body 11. Specifically, this is performed as follows.

  As shown to Fig.5 (a), a pair of 1st press member 51 is arrange | positioned above and below the steel pipe column main body 11 fixed in the fixed position by the 1st fixing means 31 (refer FIG. 2), and it is from an up-down direction. The steel pipe column main body 11 is pressed. At this time, as shown in FIG. 5 (b), the steel pipe column main body 11 is pressed only in the portion that contacts the flat portion of the surface 51 a of the first pressing member 51, and only the pressed portion is formed in a flat shape. The Moreover, since the steel pipe column main body 11 is sufficiently fixed at the curved portion of the surface 51 a of the first pressing member 51, the portion in contact with the flat portion of the surface 51 a of the first pressing member 51 is uniformly pressed.

  When the pressing by the first pressing member 51 is completed, as shown in FIG. 5C, the configuration of the pressing member is changed to the second pressing member 52, and the steel pipe column body 11 is pressed by the second pressing member 52. At this time, as shown in FIG.5 (d), as for the steel pipe column main body 11, only the part contact | abutted with the surface 52a of the 2nd press member 52 is pressed, and only the pressed part is formed in planar shape. Here, since the area of the plane portion of the surface 52a of the second pressing member 52 is larger than that of the surface 51a of the first pressing member 51, the plane portion formed in the steel pipe column main body 11 as compared with the pressing by the first pressing member 51. The area increases.

  When the pressing by the second pressing member 52 is completed, the configuration of the pressing member is changed to the third pressing member 53 as shown in FIG. 5E, and the steel pipe column body 11 is pressed by the third pressing member 53. At this time, as shown in FIG.5 (f), only the part which contact | abuts the surface 53a of the 3rd press member 53 is pressed, and only the pressed part is formed in planar shape. Here, since the area of the plane portion of the surface 53a of the third pressing member 53 is larger than that of the surface 52a of the second pressing member 52, the plane portion formed in the steel pipe column main body 11 is compared with the pressing by the second pressing member 52. The area increases. When the pressing by the third pressing member 53 is completed, the contact portion 12 (plane portion 12a) is formed at a predetermined position of the steel pipe column main body 11.

  As described above, the pressing range in which the pressing unit 50 presses the outer peripheral surface of the steel pipe column main body 11 by changing the shape of the surface that presses the outer peripheral surface of the steel pipe column main body 11 in the pressing unit 50 (area of the plane portion). However, it spreads gradually (in steps) in the circumferential direction of the steel pipe column main body 11. As a result, the outer peripheral surface of the steel pipe column main body 11 is gradually (stepwise) pressed by the pressing means 50, and the outer peripheral surface of the steel pipe column main body 11 is pressed uniformly and flattened (flatness). The contact portion 12 (planar portion 12a) is formed.

  In addition, the said method is a method of forming the contact part 12 (plane part 12a) in the two directions of the steel pipe column main body 11. FIG. Therefore, in order to form the remaining two contact portions 12 (plane portion 12a), the steel pipe column main body 11 is rotated by 90 degrees in FIG. 5 (f), and then from FIG. 5 (a) to (f). It is formed by performing the operation again.

  In the above method, the abutting portion 12 (planar portion 12a) is formed simultaneously on both sides of the steel pipe column main body 11. However, the method is not limited to this, and only one of the steel pipe column main bodies 11 is applied. It is good also as a structure which forms the contact part 12 (plane part 12a), or the structure which forms the contact part 12 (plane part 12a) simultaneously in the four directions of the steel pipe column main body 11. FIG.

  Furthermore, in the said method, although the press member is comprised with three types (press member 51 * 52 * 53), it is not limited to this, You may comprise with four or more types of press members. .

10 Steel pipe pillar 11 Steel pipe pillar body (steel pipe)
12 Contact part 20 Beam 33, 50 Pressing means 40 Mold (Pressing adjusting means)

Claims (4)

A steel pipe column composed of a cylindrical steel pipe,
Forming a contact portion for pressing the end of the beam in the longitudinal direction of the cylindrical steel pipe and at least one circumferential direction of the cylindrical steel pipe by pressing,
The steel pipe column is characterized in that the abutting portion is formed in a flat shape while maintaining a plate thickness comparable to that of the cylindrical steel pipe. A manufacturing method for manufacturing the steel pipe column according to claim 1,
The contact portion is formed by pressing the outer peripheral surface of the cylindrical steel pipe while gradually expanding the pressing range on the outer peripheral surface of the cylindrical steel pipe in the circumferential direction of the cylindrical steel pipe. A method of manufacturing a steel pipe column. Pressing means for pressing the outer peripheral surface of the cylindrical steel pipe;
A pressure adjusting means for adjusting a range pressed by the pressing means;
In the cylindrical steel pipe in the portion that forms the contact portion,
The method of manufacturing a steel pipe column according to claim 2, wherein the contact portion is formed by gradually expanding a range pressed by the pressing means by the pressing adjusting means. A pressing means for pressing the outer peripheral surface of the cylindrical steel pipe is disposed in a portion where the contact portion is formed in the cylindrical steel pipe,
The pressing means is configured to be able to change the shape of the surface that presses the outer peripheral surface of the cylindrical steel pipe,
The method of manufacturing a steel pipe column according to claim 2, wherein the contact portion is formed by gradually expanding a range pressed by the pressing means while changing the shape of the surface of the pressing means.

Images