H-beam reversing device and H-beam reversing method
The H-beam inversion device simplifies the structure and reduces costs while enhancing welding accuracy and efficiency by using a rotating inversion table with clamping and support mechanisms.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PASCAL ENG
- Filing Date
- 2024-11-27
- Publication Date
- 2026-05-15
AI Technical Summary
Conventional H-shaped steel inversion devices have complex structures and high costs.
The H-beam inversion device employs a simple structure comprising bases, an inversion table with a mounting surface, a clamping device, and a drive device that rotates the table to change its position, along with support and measuring means to maintain the H-shaped steel's posture and facilitate welding operations.
The device achieves a simpler and more cost-effective inversion process with improved welding accuracy and efficiency.
Smart Images
Figure 2026079639000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an H-shaped steel inversion working device and an H-shaped steel inversion working method.
Background Art
[0002] There is a device for inverting long members such as H-shaped steel and square steel pipes, and a processing yard for welding, drilling holes, etc. of long members equipped with such a device, as described in Japanese Patent Application Laid-Open No. 10-45241.
[0003] This conventional inversion device includes a moving table that travels in the workpiece conveyance direction, and a pair of support arms that are rotationally driven at least 90 degrees around a horizontal axis orthogonal to the traveling direction. One support arm and the other support arm that form the pair of support arms extend horizontally on one side and the other side in the traveling direction of the moving table (the forward side and the backward side when the moving table is traveling in a certain direction) from the rotation center axis. It is equipped with drive means for individually rotating each support arm at least 90 degrees upward from the horizontal position, and the rotation center axis of the support arm is located below the loading surface of the support arm.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] The conventional inversion device had a complex structure and high cost.
[0006] Therefore, an object of the present invention is to provide an H-shaped steel inversion working device with a simple structure and an H-shaped steel inversion working method.
Means for Solving the Problems
[0007] To achieve the above objective, the present invention employs the following means. Specifically, the H-beam inversion device of the present invention comprises a plurality of bases arranged along the longitudinal direction of the H-beam, an inversion table having a mounting surface on which the flange of the H-beam is placed, pivotally supported on the bases by a shaft provided on the inversion table, a clamping device for fixing the flange placed on the mounting surface to the mounting surface, and a drive device for rotating the inversion table clockwise and counterclockwise around the shaft to change the position of the mounting surface from a horizontal state to an inclined state.
[0008] Preferably, the inversion platform is provided with a support device that supports the lower part of the H-shaped steel fixed to the mounting surface when the mounting surface is inclined, thereby maintaining its posture. Preferably, the inversion platform is provided with a measuring means for measuring the length of the H-shaped steel attached to the inversion platform.
[0009] It is preferable that the height of the base is set so that a worker can perform welding work on the H-shaped steel fixed to the inclined mounting surface from the floor.
[0010] The drive device has a drive shaft that rotates with respect to a drive source, and it is preferable that the drive shaft is provided through the plurality of bases, and that the shaft portion and the drive shaft are interlocked and connected by a transmission means.
[0011] The drive source preferably has a motor. It is also preferable that a balancer is provided to reduce the power of the drive source.
[0012] The clamping device preferably has a hydraulic cylinder block containing a piston pin that presses against the upper surface of the flange placed on the aforementioned mounting surface, and the hydraulic cylinder block is preferably mounted on the reversing table so as to be able to change its position according to the size of the flange.
[0013] The support device preferably has a swing arm that is rotatably mounted on the base around a vertical axis and supports the H-shaped steel beam.
[0014] The support device can be installed on the floor surface and have a stand for supporting the H-shaped steel.
[0015] The clamping device can be composed of a device that fixes the flange to the placement surface by screw means.
[0016] The clamping device can have a magnet clamp embedded in the placement surface.
[0017] The H-shaped steel inversion working method of the present invention uses the H-shaped steel inversion working device to fix the H-shaped steel on the horizontal placement surface, rotate the inversion table, and perform welding operations on both sides of the H-shaped steel.
Effect of the Invention
[0018] According to the present invention, compared with a conventional structure that is complex and costly, the structure is simple and can be produced at a low cost.
Brief Explanation of the Drawings
[0019] [Figure 1] FIG. 1 is a process diagram showing an embodiment of the H-shaped steel inversion working method of the present invention. [Figure 2] FIG. 2 is a perspective view showing an embodiment of the H-shaped steel inversion working device of the present invention. FIG. (a) of the same figure shows the state when the H-shaped steel is carried in, FIG. (b) shows the state where the H-shaped steel is inverted by 90 degrees, and FIG. (c) shows the state where the H-shaped steel is inverted by +90 degrees. [Figure 3] FIG. 3 is a side view showing the clamping device. [Figure 4] FIG. 4 is a front view of FIG. 3. [Figure 5] FIG. 5 is a cross-sectional view taken along line D-D of FIG. 4. [Figure 6] FIG. 6 is a perspective view showing the swing arm. [Figure 7] FIG. 7 is an operation explanatory view of the swing arm. [Figure 8]FIG. 8 is an explanatory view of a spacer provided on the swing arm. [Figure 9] FIG. 9 is a detailed view of part C in FIG. 8. [Figure 10] FIG. 10 is a perspective view of a fixed stand provided instead of the swing arm. [Figure 11] FIG. 11 is a detailed explanatory view of the fixed stand in FIG. 10. [Figure 12] FIG. 12 is a perspective view of a movable stand provided instead of the fixed stand. [Figure 13] FIG. 13 is a detailed explanatory view of the movable stand in FIG. 12. [Figure 14] FIG. 14(a) is an explanatory view of obliquely welding the A surface of the H-shaped steel, and FIG. 14(b) is an explanatory view of obliquely welding the B surface of the H-shaped steel. [Figure 15] FIG. 15(a) is a cross-sectional view showing another embodiment of the clamping device, and FIG. 15(b) is a side view showing the shape of the T-groove. [Figure 16] FIG. 16 is a cross-sectional view showing another embodiment (magnetic clamp) of the clamping device. [Figure 17] FIG. 17 is a perspective view showing another embodiment of the driving device. [Figure 18] FIG. 18 is a perspective view showing another embodiment of the driving device. [Figure 19] FIG. 19 is an explanatory view of the operation of the embodiment shown in FIG. 18. [Figure 20] FIG. 20 is a detailed perspective view showing the transmission means. [Figure 21] FIG. 21 is a cross-sectional view of the balancer in a 90-degree inverted state. [Figure 22] FIG. 22 is a perspective view showing another embodiment of the H-shaped steel inversion working device of the present invention. [Figure 23] FIG. 23 is an enlarged view of the main part of FIG. 22. [Figure 24] FIG. 24 is a perspective view of the scribing jig. [Figure 25] FIG. 25 is a perspective view showing another embodiment of the H-shaped steel inversion working device of the present invention. [Figure 26] Figure 26 is an enlarged view of the main part of Figure 25. [Figure 27] Figure 27 is a side view of Figure 26. [Figure 28] Figure 28 is a plan view of the plate. [Figure 29] Figure 29 is a perspective view showing another embodiment of the H-beam reversing device of the present invention. [Figure 30] Figure 30 is an enlarged view of the main part of Figure 29. [Figure 31] Figure 31 is a plan view of Figure 30. [Figure 32] Figure 32 is a side view of Figure 30. [Figure 33] Figure 33 is a perspective view showing another embodiment of the H-beam reversing device of the present invention, in which the drive shaft is directly connected to the rotating shaft. [Figure 34] Figure 34 is an enlarged view of the main parts of the device in the configuration shown in Figure 33. [Figure 35] Figure 35 is an explanatory diagram showing an H-shaped steel beam rotated 90 degrees using the apparatus shown in Figure 33. [Figure 36] Figure 36 is an explanatory diagram showing the position of the object rotated 180 degrees from the position in Figure 35, resulting in a -90 degree orientation. [Figure 37] Figure 37 is an explanatory diagram showing how the apparatus shown in Figure 33 is used when diagonally welding H-beams. [Modes for carrying out the invention]
[0020] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021] In Figures 1 and 2, the H-beam reversing device has multiple bases 2 arranged along the longitudinal direction of the H-beam 1. Specifically, three bases are provided, but the number is not limited to this. The H-beam 1 has a web 1a and flanges 1b provided at both ends, with a web length (height) of 1000 to 400 mm, a flange length (width) of 400 to 200 mm, and is a long material with a length of up to 15 m for the longest pieces.
[0022] A reversing platform 3 is pivotally supported on a base 2 so as to be rotatable. Shaft portions 4, pivotally supported on the base 2, protrude from both sides of the reversing platform 3. The base 2 has a pair of frames 5 that pivotally support the shaft portions 4 on both sides. The axis of the shaft portion 4 is aligned along the length of the H-shaped steel 1.
[0023] The reversing table 3 has a mounting surface 6 on which the flange 1b of the H-shaped steel 1 is placed. The reversing table 3 is provided with a clamping device 7 for fixing the flange 1b, which is placed on the mounting surface 6, to the mounting surface 6.
[0024] The H-beam inversion device is equipped with a drive device 8 that rotates the inversion platform 3 to change the position of the mounting surface 6 from a horizontal state to an inclined state. In this embodiment, the inclined state is a vertical state tilted at 90 degrees, but in the present invention, it means inclining within the range until the tip of the H-beam 1 contacts the floor surface.
[0025] The base 2 is positioned at a height that allows worker M to perform welding work from the floor level onto the H-shaped steel beam 1, which is fixed to the vertical mounting surface 6 (see Figures 1(c) and (d)).
[0026] The drive unit 8 has a drive shaft 10 that is rotated by a drive source 9. A motor is exemplified as the drive source 9, but it is not limited to this. A reduction gear 11 is directly connected to the motor 9, and the output shaft 12 of the reduction gear 11 and the end of the drive shaft 10 are interlocked and connected by a transmission means 13. The transmission means 13 consists of a chain and a sprocket, but it may also consist of a timing belt and timing pulley or a gear connection. The drive unit 8 has a control panel 38, and the motor 9 is controlled by operating this control panel 38.
[0027] The drive shaft 10 is provided in a penetrating manner through multiple bases 2. The drive shaft 10 is pivotally supported on the frame 5 of the base 2. One end of the shaft portion 4 of the reversing table 3 protrudes outward from the frame 5. This protruding portion and the drive shaft 10 are interlocked and connected by a transmission means 14. This transmission means 14 consists of a chain and a sprocket, but it may also be a timing belt and timing pulley or a gear connection. The axes of the drive shaft 10 and the shaft portion 4 are parallel.
[0028] When the mounting surface 6 of the inversion platform 3 is in an inclined state (vertical state), a support device 15 is provided to support the lower part of the H-shaped steel beam 1 fixed to the mounting surface 6 and maintain its posture.
[0029] As shown in Figures 3 to 5, the clamping device 7 has a hydraulic cylinder block 17 that incorporates a piston pin 16 that presses against the upper surface of the flange 1b of the H-shaped steel beam 1 placed on the mounting surface 6. The hydraulic cylinder block 17 is mounted on the reversing table 3 so as to be able to change its position according to the size of the flange 1b.
[0030] The reversing table 3 is provided with a T-groove 18, and a hydraulic cylinder block 17 is slidably fitted into this T-groove 18. A pair of hydraulic cylinder blocks 17 are provided on both sides of the flange 1b of the H-beam 1 (see Figure 3). In addition, a pair of hydraulic cylinder blocks 17 are provided along the longitudinal direction of the H-beam 1 (see Figure 4), and a total of four are provided on one reversing table 3.
[0031] In Figure 5, a hydraulic cylinder 19 is provided in the hydraulic cylinder block 17. A piston pin 16 that presses against the upper surface of the flange 1b is provided in the hydraulic cylinder 19 so as to be able to extend and retract vertically. A hydraulic unit 20 is connected to the hydraulic cylinder 19 via hydraulic piping 21.
[0032] Fixing means (not shown) are provided for positioning and fixing the hydraulic cylinder block 17 in the T-groove 18 according to the size of the flange 1b. Before the flange 1b of the H-shaped steel 1 is placed on the mounting surface 6, the hydraulic cylinder block 17 is in a retracted position so that the flange 1b can be placed on the mounting surface 6 (see Figure 1(a)). Once the flange 1b is placed on the mounting surface 6, it is moved to a position where it can press the upper surface of the flange 1b and is fixed to the reversing table 3 (see Figure 1(b)).
[0033] Figures 6 to 9 show an example of the support device 15. The support device 15 has a swing arm 22 that is rotatably mounted on the base 2 around a vertical axis and supports the H-shaped steel beam 1.
[0034] The swing arm 22 horizontally supports the H-shaped steel beam 1 held on the mounting surface 6 when the mounting surface 6 is in a vertical position. The swing arm 22 is rotatably mounted on the frame 5 of the base 2 via a hinge 23 (see Figure 6).
[0035] As shown in Figure 7, when the reversing table 3 is reversed by -90 degrees and when it is reversed by +90 degrees, the swing arm 22 rotates 180 degrees by the hinge 23 to support the lower surface of the flange 1b and maintain the upper surface of the web 1a in a horizontal position.
[0036] As shown in Figure 8, in the case of an H-shaped steel beam 1 with a short flange length (width), the lower surface of the flange 1b is supported by a spacer 24 provided on the upper surface of the swing arm 22, so that the upper surface of the web 1a becomes horizontal.
[0037] As shown in Figures 6 and 9, multiple holes 25 are formed on the upper surface of the swing arm 22, and projections 26 that engage with these holes 25 are provided on the lower surface of the spacer 24. The spacer 24 can be repositioned by engaging the projections 26 with the holes 25 so that it contacts the lower surface of the flange 1b, according to the length of the web 1a. In addition, spacer 24s of multiple heights are available to accommodate the size of the H-shaped steel 1.
[0038] Figures 10 and 11 show another embodiment of the support device 15. The support device 15 has a stand 27 that is installed on the floor and supports the H-shaped steel beam 1. In this embodiment, a fixed stand 27a is provided instead of the swing arm 22. The base 2 has bases 28 that extend on both the front and rear sides, and the fixed stand 27a is erected on these bases 28. A swing arm 39 is provided on the upper part of the fixed stand 27a so as to be able to rotate around a vertical axis. A spacer 29 is provided on the upper surface of the swing arm 39 corresponding to the width of the flange 1b of the H-shaped steel beam 1.
[0039] Figures 12 and 13 show another embodiment of the support device 15. In this embodiment, the fixed stand 27a is replaced with a movable stand 27b. The movable stand 27b is mounted on the base 28 so as to be repositionable. The movable stand 27b is provided with spacers 29 according to the width of the flange 1b.
[0040] Furthermore, the position of the stand 27 is not limited to being located at a position corresponding to the base 2; it can also be located at an intermediate position between adjacent bases 2.
[0041] Figure 1 illustrates the work method using the H-beam reversing device.
[0042] The H-beam inversion method involves fixing the flange 1b of the H-beam 1 to the horizontal mounting surface 6 of the inversion table 3, inverting the inversion table 3 so that the mounting surface 6 is in a vertical position at plus or minus 90 degrees, and then having a worker perform welding work on both sides of the H-beam 1 from the floor.
[0043] Figure 1(a) shows the H-beam loading process. The flange 1b of the H-beam 1 is suspended by the crane 30. The A and B sides of the web 1a are suspended in a vertical position. The reversing platform 3 is held on the base 2 in a position where the mounting surface 6 is horizontal. The clamping devices 7 provided on the mounting surface 6 are retracted to the left and right sides so that the flange 1b of the H-beam 1 is placed on the mounting surface 6. This state is also shown in Figure 2(a). In this state, the H-beam 1 is lowered by the crane 30 and its flange 1b is placed on the mounting surface 6 of the reversing platform 3. The H-beam 1 is lowered so that the web 1a of the H-beam 1 is positioned on the axis of the shaft portion 4.
[0044] Figure 1(b) shows the H-beam clamping process. The clamping device 7, which is in a retracted position, moves to a fixed position to secure the flange 1b of the H-beam 1, which is placed on the mounting surface 6, to the mounting surface. Once the H-beam 1 is fixed to the reversing table 3, the wire of the crane 30 is released.
[0045] Figure 1(c) shows the process of inverting the H-beam 1 by -90 degrees. The minus sign (-) indicates the counterclockwise direction in the figure. The drive device 8 rotates the inversion table 3 by -90 degrees from the state shown in Figure 1(b), so that surface A of the web 1a of the H-beam 1 fixed to the inversion table 3 becomes the upper surface. At this time, the swing arm 22 of the support device 15 is swung to a position that supports the H-beam 1. The H-beam 1, which is fixed to the vertical mounting surface 6 and protrudes laterally, is supported by the swing arm 22 and can maintain a horizontal state. This state is also shown in Figure 2(b). In this state, worker M performs welding work from the floor surface onto the horizontal surface A.
[0046] Figure 1(d) shows the process of inverting an H-beam by 180 degrees. From the state shown in Figure 1(c), the inversion table 3 rotates 180 degrees, and the B-side of the web 1a of the H-beam 1 fixed to the inversion table 3 becomes the upper surface. At this time, the swing arm 22 is swung to a position that supports the H-beam 1. This state is also shown in Figure 2(c). In this state, worker M performs welding work from the floor surface onto the horizontal B-side.
[0047] According to the above method, the welding surface is kept horizontal, which improves the welding accuracy of the workers. Figures 1(c) and (d) show "horizontal welding," where welding is performed on the web 1a, while Figure 1(b) shows "vertical welding," where welding is performed on the flange 1b.
[0048] Next, we will explain "angled welding". Figure 14 shows "angled welding" with the mounting surface 6 rotated further from a vertical position. The reversing table 3 is designed to rotate to approximately plus or minus 130 degrees. In Figure (a), the flange 1b on side A becomes nearly horizontal, making it easier to weld stiffeners, etc., to the flange 1b. In Figure (b), welding of the flange 1b on side B becomes easier. A stopper pin 40 is provided on the side of the reversing table 3, and the stopper pin 40 contacts the base 2, restricting the rotation of the reversing table 3. In "angled welding", the tip of the H-beam 1 may be brought into contact with the floor surface to stabilize its position.
[0049] Figure 15 shows another embodiment of the clamping device 7, in which the clamping device 7 fixes the flange 1b to the mounting surface 6 by a screw means 31. A bolt is exemplified as the screw means 31, and the bolt 31 presses against the flange 1b. In the left side of Figure (a), a tapped hole 32 is formed in the mounting surface 6 of the reversing table 3, and a bolt 31 for tightening the retaining plate 33 is screwed into this tapped hole 32. A spacer 34 is interposed at the left end of the retaining plate 33, and the right end presses against the upper surface of the flange 1b of the H-shaped steel 1.
[0050] In the right side of Figure (a), a block 35 is slidably fitted into a T-groove 18 formed in the reversing base 3, and the upper surface of the flange 1b is pressed by a bolt 31 screwed into the left end of the block 35. This bolt 31 is not limited to being tightened manually, but may also be electrically tightened and released. Figure (b) is a side view showing the shape of the T-groove 18 and the block 35.
[0051] Figure 16 shows another embodiment of the clamping device 7. In this clamping device 7, a magnetic clamp 36 is attached to the mounting surface 6 of the reversing table 3. This magnetic clamp 36 is configured to be switchable between an adsorption state (magnetized state) in which it attracts the flange 1b and an unadsorption state (demagnetized state) in which it does not attract the flange 1b.
[0052] Figure 17 shows another embodiment of the drive unit 8. In this embodiment, the drive shaft 10 of the drive unit 8 is pivotally supported on one of the three bases 2, and rotates a reversing table 3 pivotally supported on that base 2. If this reversing table 3 is called the drive reversing table 3a, the other two reversing tables 3 are called the free-moving reversing tables 3b. The free-moving reversing tables 3b are designed to rotate in accordance with the rotation of the H-shaped steel beam 1 fixed to the mounting surface 6 of the drive reversing table 3a.
[0053] The base 2 of the driven reversing platform 3a is fixed to the floor, but the base 2 of the free-moving reversing platform 3b is provided to be movable on rails 37 laid on the floor and its position is adjusted according to the length of the H-shaped steel 1.
[0054] Figures 18 to 21 show another embodiment of the drive unit 8. In this embodiment, the drive unit 8 is equipped with a balancer 41 that reduces the power of the motor 9.
[0055] The ends of the shaft portions 4 on both sides of the reversing table 3 protrude from the frame 5, with a transmission means 14 provided at one protruding end and a balancer 41 at the other protruding end. A gas balancer is exemplified as this balancer 41. The balancer 41 has a cylinder 42 and a piston rod 43 slidably housed in the cylinder 42, and the inside of the cylinder 42 is filled with nitrogen gas. The balancer 41 balances the weight of the H-shaped steel 1 fixed to the reversing table 3 when the reversing table 3 rotates, thereby reducing the load on the motor 9.
[0056] A crank arm 44 is fixed to the protruding end of the shaft portion 4, and a cylinder end 46 is pivotally supported on a pin 45 of the crank arm 44. Below the shaft portion 4, a pin 47 is fixed to the frame 5 of the base 2. The tip of the piston rod 43 is pivotally supported on this pin 47. Figure 21 shows a cross-sectional view of the balancer 41. Nitrogen gas is sealed in the cylinder chamber between the piston top surface of the piston rod 43 and the lower surface of the cylinder end 46.
[0057] The operation of the nitrogen gas balancer 41 is explained with reference to Figure 19. In the vertical position shown in Figure 19(c), the piston rod 43 is fully extended, and in the 130-degree inverted position shown in Figures 19(a) and (e), the stroke of the piston rod 43 is set so that the piston rod 43 is fully retracted.
[0058] As shown in Figure 19(c), the flange 1b of the H-shaped steel beam 1 is fixed to the horizontal mounting surface 6 of the reversing table 3 by the clamping device 7. When the reversing table 3 is rotated by the drive device 8 in the direction shown in Figures (b) and (a) (counterclockwise), the piston rod 43 of the balancer 41 contracts and moves. At this time, the nitrogen gas inside the cylinder 42 is compressed, generating a resistance force against the rotational direction of the reversing table 3, preventing the reversing table 3 from rapidly accelerating in the rotational direction due to the weight of the H-shaped steel beam 1.
[0059] As shown in Figures 19(a) to (b) and (c), when the reversing stand 3 is rotated clockwise, the increased pressure due to compression inside the cylinder 42 moves the piston rod 43 in the extension direction. This causes the cylinder 42 to rotate the crank arm 44 clockwise, thereby reducing the power required by the motor 9 of the drive unit 8.
[0060] The same applies to the rotation of the inversion table 3 shown in Figure (c)→(d)→(e), and the rotation of the inversion table 3 shown in Figure (e)→(d)→(c).
[0061] Although the above embodiment uses a gas balancer as an example, a hydraulic balancer may also be used.
[0062] Figures 22 to 24 show another embodiment of the present invention. Conventionally, marking the positions for welding stiffeners and gusset plates to H-beams was done by marking the H-beams, which were up to 13 cm long, with chalk and a measuring tape. In this embodiment, a scale is attached to the H-beam turning device, and marking can be done using a simple jig.
[0063] In other words, the H-beam reversing device according to this embodiment is equipped with a measuring means 48 on the reversing table 3 for measuring the length of the H-beam 1 attached to the reversing table 3. This measuring means 48 is composed of a scale 48a with markings.
[0064] As shown in Figure 23, the scale 48a is provided to protrude upward from the upper end surface of the flange 1b when the inversion table 3 is inverted by +90 degrees or -90 degrees.
[0065] Figure 24 shows a marking jig 49. This marking jig 49 is L-shaped to make surface contact with the flange 1b and the web 1a. Marking holes 50 are provided in the part that contacts the flange 1b and the web 1a, and marking lines are drawn on the flange 1b and the web 1a through these holes 50. A window 51 for reading the scale markings is provided at the upper end of the part that contacts the flange 1b. A guide projection 52 is provided at the upper end of the part of the marking jig 49 that contacts the flange 1b.
[0066] This guide projection 52 slides along the upper end surface of the flange 1b, reading the scale markings on the scale 48a from the window 51, and moves longitudinally to draw a marking line on the flange 1b or web 1a from the hole 50 at a predetermined position for drawing the marking line.
[0067] According to this embodiment, marking can be easily performed on both sides A and B of the web 1a using the H-beam reversing device.
[0068] Figures 25 to 28 show a case where a "laser distance meter 48b" is used as the measuring means 48 instead of the scale 48a.
[0069] In this embodiment, the reversing table 3 is provided with a reference rail 53 arranged along the upper and lower end faces of the flange 1b. The reversing table 3 includes a guide section 54 that moves along the longitudinal direction of the H-shaped steel beam 1 guided by the reference rail 53, a marking unit 55 provided on the guide section 54, and a measuring means 48 for measuring the position of the marking unit 55. The marking unit 55 is provided with a replaceable plate 57 having marking holes 56 for drawing marking lines on the upper surface of the H-shaped steel beam 1.
[0070] The guide section 54 includes a pair of front and rear rollers 58 that run on a reference rail 53, a frame 59 that clamps the rollers 58 from both the left and right sides to support the rollers 58 so that they can rotate, and a pair of front and rear marking unit connecting bars 60 that protrude from the frame 59 toward the H-shaped steel 1. A magnet 61 is provided at the tip of the marking unit connecting bar 60 to detachably fix the marking unit 55.
[0071] The marking unit 55 has a mounting portion 62 to which the plate 57 is attached. The mounting portion 62 is provided with four wheels 63 that travel along the longitudinal direction on the upper surface of the web 1a, on the front, back, left, and right sides. A vertical wall 64 is provided at the end of the mounting portion 62, and a pair of vertically oriented elongated holes 65 are provided in the front and back of this vertical wall 64. The tip of the marking unit connecting bar 60 engages with these elongated holes 65 so as to be movable in the vertical direction. A magnet 61 is attracted to the vertical wall 64 to fix the marking unit 55 in place.
[0072] A laser distance meter 48b of the measuring means 48 is mounted on the vertical wall 64. The reflector 66 of the laser distance meter 48b is detachably attached to the end of the H-shaped steel beam 1 by a magnet 67.
[0073] As shown in Figure 28, the marking holes 56 in plate 57 are for drawing marking lines on the upper surface of the H-shaped steel beam 1. Various width (a) and length (b) dimensions of the marking holes 56 are available, allowing plate 57 to be easily replaced depending on the thickness of the plate to be welded. For example, dimension a can be selected from 12, 14, 16, 19, 22 mm, etc., and dimension b can be selected from 300, 400, 500 mm, etc.
[0074] Figures 29 to 32 show another embodiment of the H-beam reversing device of the present invention. This embodiment is a modification of the above embodiment. In the embodiment shown in Figures 22 to 24, the reading surface of the scale 48a was positioned perpendicular to the surface of the web 1a, but in this modification, the reading surface of the scale 48a is positioned parallel to the surface of the web 1a. Also, the reference rail 53 of the embodiment shown in Figures 25 to 28 is changed to the scale 48a, and the laser distance meter 48b as the measuring means 48 is replaced with the scale 48a. In this modification, the marking work is performed in the inclined state shown in Figure 14 (when the reversing table 3 has rotated to approximately plus or minus 130 degrees).
[0075] In this modified example, the marking jig 49 has a reading section 68 and a marking unit 55 provided on the reading section 68. The reading section 68 has a window 51 for reading the scale 48a, a guide projection 52 that slides along the upper surface of the scale 48a, and an L-shaped connecting section 69 that protrudes from the guide projection 52 toward the H-shaped steel 1 toward the web 1a, with the marking unit 55 connected to its lower end.
[0076] The marking unit 55 has a mounting portion 62 for detachably attaching the plate 57. The mounting portion is provided with a wheel 63 that rolls on the upper surface of the web 1a and a running roller 70 that rolls on the inner surface of the flange 1b.
[0077] During the marking operation, since the upper surface of the web 1a is inclined, the traveling roller 70 rolls along the inner surface of the flange 1b, guiding the marking unit 55 in the longitudinal direction. The dimensions of the mounting portion 69 are changed according to the size of the H-beam 1.
[0078] Figures 33 to 37 show another embodiment of the H-beam reversing device of the present invention, in which the drive shaft 10 of the drive device 8 is directly connected to the shaft portion 4, and motors 9 are provided on both the left and right sides.
[0079] Each base 2 has a crankshaft 71 on the frame 5 at the position where the drive shaft 10 in the embodiment shown in Figure 2 was located. One end of the crankshaft 71 and the shaft portion 4 are linked together by a transmission means 14 consisting of a sprocket and a chain. A crank arm 44 is provided at the other end of the crankshaft 71. A balancer 41 is provided, with one end pivotally supported on the crank arm 44 and the other end pivotally supported on the frame 5. Specifically, the cylinder end 46 of the balancer 41 is pivotally supported on a pin 47 provided below the shaft portion 4, and the end of the piston rod 43 is pivotally supported on a pin 45 of the crank arm 44.
[0080] Figure 37 shows the state when the swing arm 39 of the support device 15 is rotated 180 degrees in the case of oblique welding.
[0081] In other embodiments of the H-beam reversing device, the drive shaft 10 of the drive unit 8 is directly connected to the shaft portion 4, and motors 9 are provided on both the left and right sides.
[0082] The crank arm 44 of the balancer 41 is located below, and the shaft portion 4 and the crankshaft are linked together by a transmission means consisting of a chain and a sprocket.
[0083] The present invention is not limited to the embodiments shown above. In the embodiments described above, welding work was performed by a worker, but it is also possible to perform automatic welding by installing a welding robot. When performing automatic welding, it is desirable that the swinging motion of the swing arm 22 be synchronized with the robot control to swing automatically. The work is not limited to welding work, but may also be machining work such as drilling, or other work. The workpiece is not limited to H-shaped steel 1, but may also be square steel pipe, etc. A swing arm type hydraulic clamp or the like can also be used as the clamping device 7.
[0084] The scope of the present invention is indicated by the claims rather than the above description, and all modifications within the meaning and scope equivalent to the claims are included. [Explanation of Symbols]
[0085] 1 H-beam 1a Web 1b Flange 2 bases 3. Turning platform 4. Shaft section 5 frames 6. Mounting surface 7. Clamping device 8. Drive system 9. Drive source (motor) 10 Drive shaft 11 Reducer 12 Output shafts 13 Transmission means (between output shaft and drive shaft) 14 Transmission means (between the shaft and the drive shaft) 15. Support device 16 Piston Pins 17 Hydraulic Cylinder Block 18 T groove 19 Hydraulic Cylinder 20 Hydraulic Units 21 Hydraulic piping 22 Swingarm 23 Hinge 24 Spacers 25 holes 26 Protrusion 27 Stands 27a Fixed stand 27b Portable Stand 28 base 29 Spacers 30 Cranes 31 Screw means (bolt) 32 tapped holes 33. Presser foot 34 Spacers 35 blocks 36 Magnetic Clamps 37 rails 38 Control panel 39 Swingarm 40 Stopper pins 41 Balancer 42 cylinders 43 Piston Rod 44 Crank Arms 45 pins 46 Cylinder end 47 pins (located on frame 5) 48 Measuring means 48a scale 48b Laser rangefinder 49 Marking jigs 50 holes 51 windows 52 Guide projection 53 Reference Rail 54 Guide section 55 Scribing Unit 56 Marking holes 57 Plates 58 Laura 59 frames 60 Marking Unit Connecting Bar 61 Magnets 62 Mounting part 63 wheels 64 vertical wall 65 long hole 66 Reflector 67 Magnets 68 Reading section 69 Connecting part 70. Traveling roller (for flange surface travel) 71 Crank Axle M worker
Claims
1. Multiple bases are arranged along the longitudinal direction of the H-shaped steel. A reversing table having a mounting surface on which the flange of the H-shaped steel is placed is pivotally supported on the base by a shaft provided on the reversing table, so as to be rotatable. The inversion platform is provided with a clamping device for fixing the flange, which is placed on the aforementioned mounting surface, to the mounting surface. An H-beam inversion device is provided with a drive device that rotates the inversion table clockwise and counterclockwise around the shaft portion to change the position of the aforementioned mounting surface from a horizontal state to an inclined state.
2. The H-beam inversion device according to claim 1, wherein a support device is provided to support the lower part of the H-beam fixed to the mounting surface of the inversion platform when the mounting surface of the inversion platform is inclined, thereby maintaining its posture.
3. The H-beam inversion device according to claim 1, wherein the height of the base is set so that a worker can perform welding work on the H-beam fixed to the inclined mounting surface from the floor.
4. The aforementioned drive device has a drive shaft that rotates with respect to a drive source, The drive shaft is provided in a penetrating manner through the multiple bases. The H-beam reversing device according to claim 1, wherein the shaft portion and the drive shaft are interlockingly connected by a transmission means.
5. The H-beam reversing device according to claim 4, wherein the drive source is a motor.
6. The clamping device has a hydraulic cylinder block containing a piston pin that presses against the upper surface of the flange placed on the aforementioned mounting surface, The H-beam inversion device according to claim 1, wherein the hydraulic cylinder block is provided on the inversion table so as to be able to change its position according to the size of the flange.
7. The H-beam reversing device according to claim 2, wherein the support device is provided on the base so as to be rotatable around a vertical axis and has a swing arm that supports the H-beam.
8. The H-beam inversion device according to claim 2, wherein the support device is installed on the floor and has a stand that supports the H-beam.
9. The H-beam inversion device according to claim 1, wherein the clamping device is configured to fix the flange to the aforementioned mounting surface by screw means.
10. The clamping device is the H-beam inversion device according to claim 1, having a magnetic clamp embedded in the mounting surface described above.
11. The aforementioned drive device has a drive shaft that rotates with respect to a drive source, The shaft portion and the drive shaft are interlocked and connected by a transmission means. The H-beam inversion device according to claim 1, further comprising a balancer for reducing the power of the drive source.
12. The H-beam inversion device according to claim 1, wherein the inversion table is provided with measuring means for measuring the length of the H-beam attached to the inversion table.
13. An H-beam inversion method using the H-beam inversion device described in claim 1, wherein the H-beam is fixed on the aforementioned horizontal mounting surface, and the inversion platform is rotated to perform welding work on both sides of the H-beam.