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JP-2026075184-A - Workpiece inversion device and workpiece inversion method

JP2026075184AJP 2026075184 AJP2026075184 AJP 2026075184AJP-2026075184-A

Abstract

[Problem] The present invention aims to provide a workpiece inversion device that is simple in structure, inexpensive, and allows for safe operation. [Solution] The workpiece reversing device 1 of the present invention comprises a T-shaped frame 4 having horizontal sections 3 on both the left and right sides at the lower end of a vertical section 2, a base 6 that pivotally supports a shaft section 5 provided at the intersection of the horizontal section 3 and the vertical section 2, and a drive device 12 that rotates the shaft section 5 to bring the vertical section 2 into a horizontal position, wherein mutually orthogonal workpiece mounting surfaces 7 are formed on the horizontal section 3 and the vertical section 2 as a first surface 7a, a second surface 7b, a third surface 7c, and a fourth surface 7d. [Selection Diagram] Figure 1

Inventors

  • 北浦 一郎

Assignees

  • パスカルエンジニアリング株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (4)

  1. A T-shaped frame having horizontal sections on both the left and right sides at the lower end of the vertical section, A base that pivotally supports the shaft portion provided at the intersection of the horizontal and vertical portions, It includes a drive device that rotates the shaft portion to bring the vertical portion into a horizontal position, A workpiece inversion device having workpiece mounting surfaces, which are mutually orthogonal to each other, formed as the first, second, third, and fourth surfaces on the horizontal and vertical sections.
  2. The workpiece inversion device according to claim 1, wherein the height of the horizontal workpiece mounting surface from the floor is set to a height at which an operator can work on the workpiece placed on the horizontal workpiece mounting surface from the floor.
  3. A method for inverting a workpiece using the workpiece inversion device described in claim 1, The process involves placing the workpiece on the third surface with the third surface horizontal and the fourth surface vertical, and then performing work on the workpiece. The steps include rotating the T-shaped frame by 90 degrees and placing the workpiece on the fourth surface, A step of lifting the workpiece from the fourth surface, The process of placing the lifted workpiece on the first surface, A method for inverting a workpiece, comprising the steps of: rotating the T-shaped frame by 90 degrees and placing the workpiece on the first surface; and performing work on the workpiece.
  4. The method for inverting a workpiece according to claim 3, wherein the worker performs the work on the workpiece from the floor level.

Description

This invention relates to a workpiece reversing device and a method for reversing a workpiece. Traditionally, the inversion of large H-beams and other structural steel sections required the use of two cranes and at least two workers, making it a dangerous operation. As an example of a device that uses a reversing mechanism to invert a workpiece, the one described in Japanese Patent Publication No. 2003-25093 (Patent Document 1) has been proposed. This conventional reversing device consisted of a pair of rotating frames, each driven to rotate around the same axis by a frame rotation device. The rotating frames held both ends of a long steel column, and the rotating frames were rotated by the respective frame rotation devices during welding of the middle section of the steel column. Japanese Patent Publication No. 2003-25093 Figure 1 is a side view of a workpiece reversing device according to an embodiment of the present invention.Figure 2 is a perspective view showing the working state of Figure 5(a) using three workpiece inversion devices.Figure 3 is a perspective view showing the working state in Figure 5(b).Figure 4 is a cross-sectional view of the drive unit.Figure 5 is a process diagram of the work method using a workpiece reversal device.Figure 6 is a side view showing the workpiece mounting surface in an inclined state. The embodiments of the present invention will be described below with reference to the drawings. In Figure 1, the workpiece reversing device 1 has a T-shaped frame 4 with horizontal sections 3 on both the left and right sides of the lower end of a vertical section 2. The T-shaped frame 4 has a shaft section 5 located at the intersection of the horizontal section 3 and the vertical section 2. A pair of shaft sections 5 are provided, protruding from the front and rear of the T-shaped frame 4, sharing the same axis. The workpiece reversing device 1 has a base 6 that pivotally supports the shaft sections 5. On the horizontal section 3 and the vertical section 2, mutually orthogonal workpiece mounting surfaces 7 are formed as the first surface 7a, the second surface 7b, the third surface 7c, and the fourth surface 7d. For explanatory purposes, the workpiece mounting surface 7 on the upper surface of the horizontal section 3 on the left side of the shaft section 5 in Figure 1 is referred to as the first surface 7a. The left side of the vertical section 2 is referred to as the second surface 7b. The right side of the vertical section 2 is referred to as the third surface 7c. The upper surface of the horizontal section 3 on the right side of the shaft section 5 is referred to as the fourth surface 7d. In Figure 1, the workpiece W is placed on the fourth surface 7d. An example of the workpiece W is an H-beam (500 mm x 1250 mm x 15000 mm). The 500 mm portion is placed on the fourth surface 7d, and the 1250 mm portion is in contact with the third surface 7c. The first surface 7a and the fourth surface 7d are symmetrical across the shaft portion 5, and their lengths from the shaft portion 5 are shorter than those of the second surface 7b and the third surface 7c. One of the pair of shaft portions 5 protrudes from the base 6, and a sprocket 8 is provided on this protruding portion. A drive shaft 9 is rotatably positioned at the lower part of the base 6, and a sprocket 10 is provided on the drive shaft 9. A chain 11 is wrapped around the sprocket 8 on the shaft portion 5 and the sprocket 10 on the drive shaft 9, thus linking the shaft portion 5 and the drive shaft 9 in an interlocking manner. As shown in Figures 2 to 4, the workpiece reversing device 1 has a drive device 12 that rotates the shaft portion 5 to bring the vertical portion 2 into a horizontal position. The drive unit 12 has a motor 13, a reduction gear 14 is directly connected to the motor 13, and a sprocket 16 is provided on the output shaft 15 of the reduction gear 14. The drive shaft 9, extending from the base 6, extends below the sprocket 16 of the output shaft 15 of the reduction gear 14, with a sprocket 17 provided at this extended end. The sprocket 17 of the drive shaft 9 and the sprocket 16 of the output shaft 15 are linked together by a chain 18. The drive unit 12 is equipped with a control panel 19 that controls the rotation of the motor 13. In this embodiment, since the workpiece W is a long H-shaped steel beam, multiple workpiece reversing devices 1 are arranged to support multiple points along the longitudinal direction of the workpiece W. In this embodiment, three workpiece reversing devices 1 are arranged. The multiple workpiece reversing devices 1 are linked by a single drive shaft 9. The T-shaped frames 4 of the three workpiece reversing devices 1 rotate synchronously around the shaft 5 due to the rotation of a single motor 13 of the drive unit 12. The height of the horizontal workpiece mounting surface 7 from the floor is set so that the worker M can work on the workpiece W placed on the horizontal workpiece mounting s