Steel material inversion device

Abstract

To reliably rotate a long and heavy steel material around a shaft while stably supporting the steel material.SOLUTION: A steel material reversing device includes a pair of reversing machines 10 provided with an interval. In the pair of reversing machines 10, a chain 3 is installed on upper and lower sprockets 2 of a pair of support arms 1 and the chain 3 is driven to rotate a steel material 9 around a shaft while supporting the steel material 9 in a looseness region 3X which hangs down from upper end parts of the facing support arms 1. The pair of reversing machines 10 each include a tilting mechanism 4 tilting at least one of the support arms 1 as a tilting support arm 1A. When a load is not applied to the steel material 9, the tilting support arm 1A takes a non-tilted posture by using an elastic body 8. When a load is applied to the steel material, the tilting support arm 1A takes a tilted posture to narrow an interval of facing upper ends of the looseness region 3X. In a driving state of the chain 3, the tilted posture of the tilting support arm 1A is changed correspondingly to the posture of the rotating steel material 9 to change the interval of the facing upper ends of the looseness region 3X.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a steel material reversing device for rotating a steel material such as an H-beam, I-beam, channel steel, L-beam, angle pipe, etc., especially a long and heavy steel material around the axis in the longitudinal direction.

Background Art

[0002] Steel materials such as H-beams used in various structures are manufactured in a factory by performing processes such as welding, drilling, and shot blasting on the steel material used as a raw material. The locations where these processes are performed on the steel material may be the front and back surfaces, or in the case of four surfaces. In order to efficiently perform these processes, it is necessary to rotate the steel material around the axis in the longitudinal direction. However, since steel materials such as H-beams are generally long and heavy, it is difficult to rotate or reverse them around the axis, and rotating them using an overhead crane in the factory is a dangerous operation.

[0003] A reversing device for reversing such a steel material has been developed (see Patent Document 1). As shown in FIG. 6, this reversing device 90 is provided with a turntable 91 that rotates by a rotating shaft 94 at the center on a base 97. A U-shaped frame 96 is vertically planted on this turntable 91 in a reverse-opening manner facing each other front and back. Sprocket wheels 95 are respectively installed at the base and the tip of this frame 96, and a material rotating chain 98 is suspended between these sprocket wheels 95. This reversing device 90 is structured to rotate the drive shaft by driving a motor, thereby moving the material rotating chain 98 suspended on the sprocket wheel 95 and rotating the H-shaped steel material 99 placed on the material rotating chain 98.

[0004] This reversing device has the problem of not being able to handle long steel materials, as it places two material rotating chains in front of and behind the turntable, and steel materials are placed on these material rotating chains, rotating the H-shaped steel materials around the axis using the moving material rotating chains. Furthermore, although this reversing device has the advantage of being able to supply steel materials of various shapes to the material rotating chain by widening the upper opening by arranging the U-shaped frame in an inverted position, the large opening at the top of the frame results in insufficient slack in the material rotating chain placed between the U-shaped frame, preventing it from making wide-area contact with steel materials of various shapes. As a result, even when the material rotating chain is driven, the steel materials slip on the surface of the material rotating chain, and it is not possible to reliably rotate all the steel materials around the axis. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Official Gazette No. 559-037350 [Overview of the project] [Problems that the invention aims to solve]

[0006] This invention was developed to solve the above-mentioned problems, and one of its objectives is to provide a steel material inversion device that can reliably rotate and invert long and heavy steel materials around their longitudinal axis while stably supporting them. Means for solving the problems and effects of the invention.

[0007] A steel material turning device according to one embodiment of the present invention comprises a pair of turning machines arranged at a distance from each other, which support a steel material having a longitudinal axis in a horizontal position and rotate the steel material around its longitudinal axis. Each pair of turning machines comprises a pair of support arms arranged in a position projecting upward from a base and forming a support area for supporting the steel material between them, a sprocket rotatably positioned above and below the pair of support arms, and an endless track chain mounted on the sprocket and arranged in a position hanging down from the upper ends of the opposing pair of support arms, with a slack area formed in the support area. The pair of turning machines are driven to rotate the steel material around its longitudinal axis while supporting both ends of the steel material placed in the support area with the slack areas of the chain. Each of the two reversing machines has a structure in which at least one support arm is a tilting support arm, and the upper ends of the pair of support arms are tilted toward and toward each other via a tilting mechanism. This tilting mechanism comprises a tilting shaft to which the lower end of the tilting support arm is tiltably connected to a base, and an elastic body that biases the tilting support arm connected by the tilting shaft toward the opposing support arm. When no load of steel material is applied to the slack region of the chain, the elastic force of the elastic body keeps the tilting support arm in a non-tilted position. When a load of steel material is applied to the slack region of the chain, the tilting support arm is tilted to narrow the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state. Furthermore, in the chain driving state, the tilting mechanism changes the tilting position of the tilting support arm in accordance with the position of the steel material rotating around the axis, thereby changing the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state.

[0008] The above-described steel material inversion device has the advantage of being able to stably support and reliably rotate and invert even long and heavy steel materials around their longitudinal axis. This is because the inversion device comprises a pair of inversion machines arranged in a straight line and spaced apart, and these inversion machines are positioned such that a chain, which is stretched over sprockets located above and below the pair of support arms, is slackened between the pair of support arms to form a slack region, and the device also has a tilting mechanism that tilts the tilting support arms in a direction that brings the upper ends of the pair of support arms closer together and further apart from each other. In this inversion device, the tilting mechanism changes the tilting posture of the tilting support arms according to the positional relationship of the steel material with respect to the slack region of the chain, and supports the steel material with the chain, so that even steel materials of various shapes can be rotated around their longitudinal axis while controlling the tilting posture of the tilting support arms to an optimal state.

[0009] In particular, the tilt support arm can be adjusted to stably support the steel material with the chain by changing its tilt position depending on whether the load of the steel material is applied to the slack region of the chain or not, thereby adjusting the distance between the opposing upper ends of the slack region of the chain. Furthermore, when the chain is in operation, the tilt position of the tilt support arm can be changed according to the orientation of the steel material rotating around the axis, allowing the steel material to be reversed in an ideal state by adjusting the distance between the opposing upper ends of the slack region of the chain.

[0010] In this specification, "reversal of steel material" refers to the action of rotating a steel material extending in the longitudinal direction around its axis, and does not specify that the rotation angle of the steel material is 180 degrees. In other words, "reversal of steel material" is used in a broad sense to include rotating the steel material around its axis by 90 degrees, 270 degrees, etc.

[0011] In another embodiment of the present invention, the steel reversing device uses a coil spring as the elastic body of the tilting mechanism, with one end of the coil spring connected to the middle part of the tilting support arm and the other end connected to a fixed arm that rises from a base outside the tilting support arm.

[0012] In another embodiment of the present invention, a steel material inversion device can connect a coil spring to a tilting support arm or a fixed arm via an adjustment mechanism that adjusts its elastic force. By adjusting the elastic force of the elastic body, various steel materials can be inverted to an ideal state.

[0013] In another embodiment of the present invention, a steel material inversion device is configured such that one of a pair of support arms is a tilting support arm and the other is a fixed support arm, fixed to a base, and the upper end of the fixed support arm is fixed in a position tilted toward the tilting support arm.

[0014] The above reversing device has the advantage of being able to stably support the steel material while suppressing fluctuations in the position of the chain slack area, because one of the support arms is fixed as a fixed support arm and fixed in a position tilted toward the tilting support arm.

[0015] In another embodiment of the present invention, a steel material turning device can be configured such that one of a pair of turning machines is a driven turning machine equipped with a drive mechanism for driving a chain mounted on a sprocket, and the drive mechanism of the driven turning machine drives the chain to rotate the steel material around its axis, and the other of the pair of turning machines is a driven turning machine, and the chain of the driven turning machine is driven via the steel material rotating around its axis.

[0016] The above reversing device reduces manufacturing costs while reliably reversing steel materials by driving the chains of two reversing machines in sync via the rotating steel material. In particular, it can rotate the steel material with a simple drive mechanism without requiring a drive mechanism to synchronize the two reversing machines.

[0017] In another embodiment of the present invention, the steel material reversing device has a support arm made of a square pipe and a hollow section in the base, and the area of ​​the chain stretched over the sprocket, excluding the slack area, can be arranged as a tensioned area inside the support arm and in the hollow section of the base.

[0018] The above-described reversing device has the feature that it can be protected by covering the stretched area, which is the area other than the slack area of the chain, with a support arm or a base. Further, by housing the driven chain inside the support arm or the base, it is possible to surely prevent an operator from touching the chain, without soiling the operator's clothing or skin, and also surely prevent the occurrence of entrainment troubles caused by the chain, thereby realizing safe work. Also, it has the feature that it can effectively prevent foreign matter from adhering to the chain and effectively prevent malfunction from occurring.

[0019] The steel material reversing device according to another embodiment of the present invention further includes a lifting table disposed between a pair of reversing machines. In a state where the lifting table is in the lowered position, the pair of reversing machines support the steel material in a state of suspending both ends of the steel material with a chain. In a state where the lifting table is in the raised position, the pair of reversing machines releases the support state of suspending the steel material with the chain, and the central portion of the steel material can be supported by the lifting table.

[0020] By effectively using the lifting table disposed between the pair of reversing machines, the above-described reversing device can further process the steel material while increasing the working efficiency.

Brief Description of the Drawings

[0021] [Figure 1] It is a schematic perspective view of a steel material reversing device according to an embodiment of the present invention. [Figure 2] It is a front view showing a state where no load of the steel material is applied to the chain of the reversing machine of the reversing device shown in FIG. 1. [Figure 3] It is a partially enlarged front view showing a state where a load of the steel material is applied to the chain of the reversing machine shown in FIG. 2. [Figure 4] It is a process diagram showing the process of rotating and reversing the steel material around the axis by the reversing device shown in FIG. 1. [Figure 5] It is a process diagram showing the process of placing the steel material at a fixed position of the reversing device shown in FIG. 1 and supporting it in a horizontal posture. [Figure 6] It is a front view of a conventional steel material reversing device. <H

Modes for Carrying Out the Invention

[0022] Hereinafter, the present invention will be described in detail based on the drawings. In the following description, terms indicating specific directions or positions (for example, "up", "down", and other terms including these terms) are used as necessary, but the use of these terms is for facilitating the understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meanings of these terms. Also, parts denoted by the same reference numerals in a plurality of drawings indicate the same or equivalent parts or members. Furthermore, the embodiments shown below are specific examples of the technical idea of the present invention and do not limit the present invention below. Also, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention only thereto without specific description, but are intended to be illustrative. Also, the content described in one embodiment or example is applicable to other embodiments or examples. Also, the sizes and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation.

[0023] [Embodiment 1] The reversing device for steel materials according to Embodiment 1 of the present invention is shown in FIG. 1. The reversing device 100 shown in this figure includes a pair of reversing machines 10 arranged at intervals. As shown in the figure, the reversing device 100 has a structure in which both ends of the steel material 9 are supported by a pair of reversing machines 10 and held in a horizontal posture, and the steel material 9 is rotated around the longitudinal axis. Further, the reversing device 100 shown in FIG. 1 includes a lifting platform 30 arranged between the pair of reversing machines 10.

[0024] (Reversing Machine 10) As shown in Figures 1 to 3, the pair of reversing machines 10 each consist of a pair of support arms 1 positioned to protrude upward from the base 5, forming a support area 6 between them to support the steel material 9; sprockets 2 rotatably positioned above and below the pair of support arms 1; and a continuous track chain 3 mounted on the sprockets 2, with a slack area 3X formed in the support area 6, which hangs down from the upper ends of the opposing pair of support arms 1. The pair of reversing machines 10 are structured to rotate the steel material 9 around its longitudinal axis by driving the chain 3 while supporting both ends of the steel material 9 positioned in the support area 6 with the slack area 3X of the chain 3.

[0025] (Base 5) The base 5 supports the pair of support arms 1 in a position where they protrude upward. The base 5 is a platform for stably supporting the pair of support arms 1 and is formed by combining steel materials such as structural steel. The base 5 shown in the figure comprises a main body 5A to which the lower ends of the pair of support arms 1 are connected, and support parts 5B that support both ends of the main body 5A in a crossed position.

[0026] (Support arm 1) The pair of support arms 1 are arranged in an upright position, with their lower ends connected to both ends of the main body 5A of the base 5. The pair of support arms 1 are arranged facing each other, with a support area 6 for placing the steel material 9 between them. The support arms 1 shown in the figure are formed from hollow square pipes, and a chain 3, which will be described later, can be placed inside them.

[0027] (Sprocket 2) A pair of support arms 1 are connected to sprockets 2 that are rotatably connected to their upper and lower ends. As shown in Figures 2 and 3, the support arms 1 are inside hollow square pipes, and the sprockets 2 are connected to their upper and lower ends via rotating shafts 11. The reversing machine 10, which positions the sprockets 2 inside the hollow support arms 1, is configured such that, with the chain 3 stretched over the sprockets 2, the area excluding the slack region 3X formed between the pair of support arms 1 is designated as the tension region 3Y, and the sprockets 2 are positioned in the hollow section between the support arms 1 and the base 5. This structure has the advantage of being able to drive the chain 3 while protecting it by housing the chain 3 inside the main body 5A of the support arms 1 and the base 5. The sprockets 2, positioned inside the support arms 1, are rotatably arranged via the rotating shafts 11. The sprockets 2 shown in the figures are housed inside the support arms 1 and the base 5, but the sprockets 2 can also be positioned so that they are exposed outside the support arms 1 and the base 5.

[0028] (Chain 3) Chain 3 is mounted on multiple sprockets 2 arranged on the support arm 1 and positioned in a fixed location. The chain 3 shown in the figure is a roller chain that meshes with the teeth of the sprockets 2 and is driven by the rotating sprockets 2. This chain 3 is a metal roller chain and is designed to have sufficient strength to withstand the load of the steel material 9. The chain 3 mounted on the sprockets 2 connected to the support arm 1 is positioned in a posture that hangs down from the upper ends of the opposing support arms 1 in the support region 6 formed between the pair of support arms 1, and this hanging portion is exposed as a slack region 3X. The chain 3 is mounted on multiple sprockets 2 built into the support arm 1 and base 5, and has a total length that hangs down between the sprockets 2 provided at the upper ends of the opposing support arms 1 to form a slack region 3X.

[0029] The slack region 3X formed between the pair of support arms 1 is the portion that supports the steel material 9 in a suspended state, as will be described later. Therefore, the slack region 3X of the chain 3 is preferably designed to be long enough to be positioned along three surfaces of the steel material 9, excluding the upper surface, which is placed in the support region 6, as shown in Figure 3. As shown in the figure, the length of the slack region 3X of the chain 3 is adjusted so that a slack region 3X with a depth of 50% to 80% of the height of the support arm 1 is formed. The chain 3, which is mounted on a sprocket 2 provided at the upper end of the opposing support arms 1, hangs down by its own weight between them, forming a slack region 3X in the support region 6 formed between the pair of support arms 1. As shown in Figure 2, the slack region 3X of the chain 3 formed in the support region 6 is exposed from the support arm 1. In other words, the chain 3 in the figure has a tensioned region 3Y, which is the area excluding the slack region 3X that is placed in the support region 6, and is protected by being positioned inside the support arm 1 and the base 5.

[0030] (Drive mechanism 7) The reversing device 100 described above has a structure in which a pair of reversing machines 10 support both ends of the steel material 9, which is placed in the support area 6, with the slack area 3X of the chain 3, and the chain 3 is driven to rotate the steel material 9 around its longitudinal axis. Therefore, the reversing machine 10 is equipped with a drive mechanism 7 for driving the chain 3 which is mounted on the sprocket 2. In the reversing device 100 shown in Figures 1 to 3, only one of the pair of reversing machines 10 is equipped with the drive mechanism 7. In the reversing device 100 shown in Figure 1, one of the pair of reversing machines 10 (the front in Figure 1) is a drive-side reversing machine 10A equipped with a drive mechanism 7 for driving the chain 3 mounted on the sprocket 2, and the other of the pair of reversing machines 10 (the rear in Figure 1) is a driven-side reversing machine 10B which is not equipped with a drive mechanism 7 for driving the chain 3. Here, the drive-side reversing machine 10A and the driven-side reversing machine 10B differ only in their structure, which includes a drive mechanism 7 for driving the chain 3; other than the presence or absence of the drive mechanism 7, they have the same structure.

[0031] The drive mechanism 7 rotates a sprocket 2 provided on the drive-side reversing machine 10A to drive a chain 3 stretched across the sprocket 2. The drive mechanism 7 shown in Figures 1 to 3 drives the chain 3 of the drive-side reversing machine 10A by rotating a sprocket 2 located at the lower end of one of the support arms 1 (right side in the figure) of the drive-side reversing machine 10A as the drive sprocket 2X. The drive mechanism 7 shown in the figure includes a drive motor 12 and a rotation transmission mechanism 13 that transmits the rotational torque of the drive motor 12 to the drive sprocket 2X. The rotation transmission mechanism 13 includes a first sprocket 14 connected to the rotating shaft 12A of the drive motor 12, a second sprocket 15 connected to the drive sprocket 2X via a drive shaft 16, and a transmission chain 17 stretched across the first sprocket 14 and the second sprocket 15. The drive mechanism 7 shown in the figure enhances safety by covering the rotation transmission mechanism 13 with a cover portion 18. The drive mechanism 7 described above rotates the drive sprocket 2X in the forward direction when the drive motor 12 is rotated in the forward direction, thereby driving the chain 3 in the forward direction, and rotates the drive sprocket 2X in the reverse direction when the drive motor 12 is rotated in the reverse direction, thereby driving the chain 3 in the reverse direction. The reversing device 100 shown in Figure 1 is equipped with a controller 26 for controlling the drive mechanism 7. This controller 26 is equipped with an operating section for controlling the forward and reverse rotation of the drive motor 12.

[0032] The reversing mechanism 10 shown in the figure is one of the support arms 1, and as will be described in detail later, a drive mechanism 7 is provided on a fixed support arm 1B that is fixed to the base 5 in a non-tilting state. This structure, in which the drive mechanism 7 is provided on the fixed support arm 1B, has the advantage of being able to drive the chain 3 stably because the sprocket 2 located on the fixed support arm 1B is driven as the drive sprocket 2X. However, the drive mechanism 7 does not necessarily have to drive the sprocket 2 on the fixed support arm 1B; it can also drive the sprocket 2 on the tilting support arm 1A, which will be described later, or a sprocket can be provided in a part other than the pair of support arms, for example, inside the base, and this sprocket can be driven as the drive sprocket that drives the chain.

[0033] As described above, in a structure where only one of the pair of inverting machines 10 is equipped with a drive mechanism 7, the drive mechanism 7 of the driving inverting machine 10A drives the chain 3, causing the moving chain 3 to rotate one end of the steel material 9 around its axis. In this state, the other end of the steel material 9 rotating around its axis drives the chain 3 of the driven inverting machine 10B. That is, the chain 3 of the driven inverting machine 10B is driven via the steel material 9 that is rotating around its axis. The chain 3 of the driven inverting machine 10B is driven synchronously with the chain 3 of the driving inverting machine 10A via the rotating steel material 9, causing the steel material 9 to rotate smoothly. In this way, a structure in which only one of the pair of inverting machines 10 is equipped with a drive mechanism 7 for the chain 3 does not require a complex mechanism to rotate two drive motors in sync, and the chains 3 of both inverting machines 10 can be driven synchronously with a single drive motor 12, allowing for safe operation while reducing manufacturing costs.

[0034] (Tilt mechanism 4) Furthermore, the inverting machine 10 is designed to stably support steel materials 9 of various shapes and to allow the steel materials 9 of various shapes to rotate stably around an axis. At least one support arm 1 is tilted via a tilting mechanism 4, causing the upper ends of a pair of support arms 1 to move toward and away from each other. In the inverting machine 10 shown in Figures 2 and 3, one of the pair of support arms 1 (left side in the figure) is a tiltable support arm 1A that is tiltably positioned relative to the base 5, while the other support arm 1 (right side in the figure) is a fixed support arm 1B fixed to the base 5 in a predetermined position. The tilting mechanism 4 includes a tilting shaft 19 to which the lower end of the tiltable support arm 1A is tiltably connected to the base 5, and an elastic body 8 that biases the tiltable support arm 1A connected by the tilting shaft 19 toward the opposing fixed support arm 1B.

[0035] The tilting axis 19 is connected to the connecting plates 20 provided on both sides of the lower end of the tilting support arm 1A and the main body portion 5A of the base 5, passing through them, and allows the tilting support arm 1A, which tilts around the tilting axis 19, to tilt toward the fixed support arm 1B. The tilting mechanism 4 shown in the figure is provided with a tilting stopper 21 that contacts and stops the tilting support arm 1A when it is tilted furthest toward the fixed support arm 1B. The tilting stopper 21 shown in the figure is a protrusion provided that protrudes from the upper surface of the main body portion 5A of the base 5. Figure 3 shows the state in which the tilting support arm 1A is tilted furthest toward the fixed support arm 1B. In this state, the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 is at its narrowest.

[0036] The elastic body 8 biases the tilting support arm 1A away from the fixed support arm 1B, causing the tilting support arm 1A to tilt from an inclined position to a vertical position (non-inclined position). The elastic body 8 shown in the figure is a coil spring 8A, which is a tension spring. One end of the elastic body 8, which is a coil spring 8A, is connected to the middle part of the tilting support arm 1A, and the other end is connected to a fixed arm 22 that rises from the base 5 on the outside of the tilting support arm 1A.

[0037] Furthermore, the tilting mechanism 4 shown in the figure is equipped with an adjustment mechanism 23 for adjusting the elastic force of the coil spring 8A. The adjustment mechanism 23 shown in the partially enlarged view of Figure 3 consists of a ring screw 24 provided at the connection point between the coil spring 8A and the fixed arm 22, and a nut portion 25 into which the ring screw 24 is screwed. The ring screw 24 has a ring portion 24B connected to the rear end of the screw portion 24A, and is structured so that one end of the coil spring 8A can be locked to this ring portion 24B. The nut portion 25 is a nut into which the screw portion 24A of the ring screw 24 is screwed, and is structured so that the elastic force of the coil spring 8A can be adjusted by adjusting the amount of screwing into the screw portion 24A and moving the position of the ring portion 24B in the axial direction. The nut portion 25 shown in the figure is equipped with a first nut 25A and a second nut 25B located on both sides of the through hole 22a provided in the fixed arm 22. Thus, the structure with a pair of nuts on both sides of the fixed arm 22 has the advantage of fixing the ring screw 24 to the fixed arm 22 and preventing the ring screw 24 from unexpectedly moving axially relative to it. The adjustment mechanism 23 of this structure adjusts the elastic force of the coil spring 8A by determining the position of the ring screw 24 by tightening the outer first nut 25A with the inner second nut 25B loosened, and then fixing the ring screw 24 to the fixed arm 22 via the pair of nuts by tightening the inner second nut 25B toward the fixed arm 22 after determining the position of the ring screw 24. However, the nut portion 25 can also be fixed coaxially with the through hole 22a provided in the fixed arm 22, and the elastic force of the coil spring 8A can be adjusted by screwing the ring screw 24 into the nut portion 25 and moving the position of the ring portion 24B in the axial direction. Furthermore, the adjustment mechanism is not limited to the above structure, and all other mechanisms that can adjust the axial length of the coil spring 8A can be adopted. Furthermore, although the adjustment mechanism shown in the figure is connected to the fixed arm, the adjustment mechanism can also be provided on the tilting support arm side.

[0038] The tilting mechanism 4 described above maintains the tilting support arm 1A in a non-tilted position by the elastic force of the elastic body 8 when no load of steel material 9 is applied to the slack region 3X of the chain 3. The reversing machine 10 shown in Figure 2 shows a state in which no load of steel material 9 is applied to the slack region 3X of the chain 3, and in this state, the tilting support arm 1A is held in a non-tilted, vertical position by the tilting mechanism 4. Furthermore, when a load of steel material 9 is applied to the slack region 3X of the chain 3, the tilting mechanism 4 sets the tilting support arm 1A in an inclined position, as shown in Figure 3, to narrow the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 that supports the steel material 9 in a suspended state.

[0039] Thus, the structure in which the tilting support arm 1A is in a non-tilted position when the load of the steel material 9 is not applied to the slack region 3X of the chain 3, and in a tilted position when the load of the steel material 9 is applied to the slack region 3X of the chain 3, has the advantage, as shown in Figure 2, that when the steel material 9 is placed in the slack region 3X formed in the support region 6 of the reversing machine 10, the distance between the upper ends of the pair of support arms 1 is widened, or in other words, the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 is widened, making it easier to move the steel material 9 to a predetermined position in the slack region 3X. Furthermore, when the load of the steel material 9 is applied to the slack region 3X of the chain 3, the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 is narrowed, which has the advantage of allowing the steel material 9 to be held stably by making contact between both sides of the steel material 9 and the chain 3 over a wider surface area.

[0040] Furthermore, the tilting mechanism 4, when the chain 3 is driven to rotate the steel material 9 around its axis, changes the tilting position of the tilting support arm 1A in response to the changing posture of the steel material 9 due to rotation, thereby changing the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 that supports the steel material 9 in a suspended state. For example, as shown in Figures 4(A) to 4(G), in the process of rotating and reversing the steel material 9 around its axis, the tilting position of the tilting support arm changes according to the posture of the rotating steel material 9. In the posture shown in Figure 5(B), the cross-sectional shape of the steel material 9 is elongated in the vertical direction, so the tilting mechanism 4 sets the tilting support arm 1A to its most tilted position, narrowing the distance (d) between the opposing upper ends of the slack region 3X of the chain 3. As a result, the steel material 9 comes into contact with the chain 3 over a wide area including both sides, and is reliably rotated by the driven chain 3.

[0041] Furthermore, as shown in Figures 5(C) to (E), when the steel material 9 rotates around its axis and its cross-sectional shape widens in the left-right direction, the elastic force of the elastic body 8 causes the tilting support arm 1A to tilt from an inclined position to a non-inclined position, widening the distance (d) between the opposing upper ends of the slack region 3X of the chain 3. In this way, the tilting mechanism 4 widens the support region 6 by tilting the tilting support arm 1A so that the upper ends of the pair of support arms 1 are widened, allowing the steel material 9 to rotate smoothly. Also, even when the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 widens, the tilting support arm 1A returns to a non-inclined position, allowing the steel material 9 to contact the chain 3 over a wide area and be reliably rotated by the driven chain 3. In particular, even when the rotating steel material 9 is in a sideways position, it can rotate reliably while suppressing contact between the chain 3 and the inner surface of the support arm 1.

[0042] The fixed support arm 1B, which is fixed to the base 5, is fixed in a position where its upper end is tilted toward the tilting support arm 1A. In this way, the fixed support arm 1B, which is fixed in a position tilted toward the opposing tilting support arm 1A, can position the chain 3 hanging from the sprocket 2 at its upper end toward the opposing support arm 1, i.e., toward the tilting support arm 1A. In the process of rotating the steel material 9 around its axis, this has the advantage of easily narrowing the distance between the opposing upper ends of the slack region 3X, allowing the chain 3 to be positioned around the steel material 9. Furthermore, by fixing the position of the chain 3 hanging from the sprocket 2 at its upper end toward the fixed support arm 1B, fluctuations in the slack region 3X located in the support region 6 can be suppressed, and the position supporting the steel material 9 can be stabilized.

[0043] Thus, the structure in which one of the pair of support arms 1 is a tiltable tilting support arm 1A and the other is a fixed support arm 1B fixed to the base 5 has the advantage of suppressing fluctuations in the position of the slack region 3X of the chain 3 and stably supporting the steel material 9. However, the reversing machine 10 can also be connected to the base 5 so that both support arms 1 are tiltable support arms 1A and can be tilted. The reversing machine 10 with this structure has the advantage of widening the support region 6 of the pair of support arms 1, so that even wide steel material 9 can be easily guided into the slack region 3X.

[0044] (Elevator platform 30) As shown in Figure 1, the lifting platform 30 is positioned between a pair of inverting machines 10 that are spaced apart, and supports the central part of the steel material 9. The lifting platform 30 shown in Figure 1 includes an upper and lower platform 32 that moves parallel to the base 31 vertically, and a pair of rotating rollers 33 are provided on the upper surface of this upper and lower platform 32. The rotating rollers 33 are positioned so that their rotation shafts 34 are perpendicular to the longitudinal direction of the steel material 9. Both ends of the rotation shafts 34 of the rotating rollers 33 are connected to the upper and lower platform 32 via bearings 35. The pair of rotating rollers 33 are positioned apart in the longitudinal direction of the steel material 9, so that the steel material 9 can be stably supported by the two rotating rollers 33. Furthermore, the lifting platform 30 is equipped with a lifting mechanism 36 that moves the upper and lower platform 32 up and down. The lifting mechanism 36 shown in the figure includes an X-link 37 that connects the base 31 and the upper and lower platform 32, and a drive unit (not shown) such as a hydraulic cylinder that deforms the X-link from a horizontal position to an upright position. The inversion device 100 shown in Figure 1 is equipped with a controller 26 for controlling the lifting platform 30. This controller 26 is equipped with an operating section for controlling the raising and lowering of the lifting platform 30.

[0045] As shown in Figure 1, the inversion device 100 is installed with a pair of inversion machines 10 arranged in a straight line with a gap between them. The pair of inversion machines 10 arranged in a straight line are installed so that the inclined support arm 1A and the fixed support arm 1B are located in the same direction. The distance between the pair of inversion machines 10 is determined according to the total length of the steel material 9 to be inverted. Furthermore, a lifting platform 30 is installed in the middle of the pair of inversion machines 10. The lifting platform 30 is located on a straight line connecting the support areas 9 of the pair of inversion machines 10, preferably in the middle of the pair of inversion machines 10. The inversion device 100 is used as follows.

[0046] As shown in Figures 1 and 5(B), the reversing device 100 supports the steel material 9 by suspending both ends with chains 3 when the lifting platform 30 is in the lowered position. Also, as shown in Figure 5(C), when the lifting platform 30 is in the raised position, the pair of reversing machines 10 release the support of the steel material 9 by chains 3, and the central part of the steel material 9 is supported by the lifting platform 30. This reversing device 100 allows for welding, drilling, and other processing of the steel material 9 while the steel material 9 is supported in a horizontal position on the upper surface of the lifting platform 30 with the lifting platform 30 in the raised position. Furthermore, as shown in Figure 4(G), after rotating the steel material 9 around its axis to reverse its orientation, welding, drilling, and other processing of the steel material 9 can be performed on the steel material 9 while the steel material 9 is supported in a horizontal position on the upper surface of the lifting platform 30 with the lifting platform 30 in the raised position.

[0047] The inversion device 100 described above holds the steel material 9 in a horizontal position and rotates the steel material around its longitudinal axis as follows. [Process of supporting and processing steel material 9 on a lifting platform 30] As shown in Figure 5(A), the steel material 9 is moved to a predetermined position on the inversion device 100 using an overhead crane or the like, and the steel material 9 is supported in the slack region 3X of the chain 3. As shown in Figure 5(B), when the load of the steel material 9 is applied to the slack region 3X of the chain 3, the tilting support arm 1A is tilted, and the distance (d) between the opposing upper ends of the slack region 3X of the chain 3 is narrowed, providing stable support. Furthermore, as shown in Figure 5(C), the upper and lower platforms 32 of the lifting platform 30 are raised to the raised position, and the steel material 9 is held in a horizontal position on the upper surface of the lifting platform 30. In this state, predetermined processing is performed on the steel material 9.

[0048] [A process of rotating the steel material 9 around its longitudinal axis] As shown in Figures 4(A) and 4(B), the lifting platform 30 is lowered to its lowered position. In this state, the load of the steel material 9 is applied to the slack region 3X of the chain 3, causing the tilting support arm 1A to tilt, which narrows the distance (d) between the opposing upper ends of the slack region 3X of the chain 3, allowing the chain 3 to stably hold the steel material 9. As shown in Figures 4(B) to 4(F), the drive mechanism 7 rotates the drive sprocket 2X to drive the chain 3. The driven chain 3 moves while gradually rotating the steel material 9. At this time, the tilting mechanism 4 changes the tilting position of the tilting support arm 1A in accordance with the position of the rotating steel material 9, thereby changing the distance (d) between the opposing upper ends of the slack region 3X of the chain 3. As shown in Figure 4(F), when the steel material 9 has rotated to the predetermined position, as shown in Figure 4(G), the lifting platform 30 is raised to its upper position, and the steel material 9 is held in a horizontal position on the upper surface of the lifting platform 30. In this state, the inverted steel material 9 is subjected to predetermined processing. [Industrial applicability]

[0049] The above-described steel material reversing device can be used to reliably and stably rotate long and heavy steel materials around their axis, making it suitable for processing steel materials of various shapes. [Explanation of symbols]

[0050] 100... Reversing device 1...Support arm 1A...Tilting support arm 1B... Fixed support arm 2... Sprocket 2X… Drive sprocket 3... Chain 3X…Sagging area 3Y…Stretching area 4…Tilt mechanism 5…Base 5A…Main unit 5B…Support part 6...Support area 7…Drive mechanism 8...Elastic body 8A... Coil spring 9…Steel material 10… Reversing machine 10A...Drive-side reversing machine 10B... Driven side reversing machine 11…Rotation axis 12…Drive motor 12A... Rotating shaft 13…Rotation transmission mechanism 14…First sprocket 15...Second sprocket 16…Drive shaft 17…Transmission chain 18...Cover part 19…Tilt axis 20…Connecting plate 21...Tilting stopper 22…Fixed arm 22a...Through hole 23...Adjustment mechanism 24... Ring screw 24A...Screw part 24B...Ring section 25... Nut part 25A...First nut 25B...Second nut 26…Controller 30… Elevating platform 31...Base 32…Upper and lower stand 33... Rotating roller 34…Rotation axis 35... Bearing 36… Lifting mechanism 37...X-Link 90... Inverting device 91... Turntable 94... Rotation axis 95... Sprocket Wheel 96...frame 97... Base 98…Material: Rotating chain 99…H-shaped steel material

Claims

1. A steel material inversion device comprising a pair of inversion machines arranged at intervals, for supporting a steel material having a longitudinal axis in a horizontal position with the pair of inversion machines and rotating the steel material around its longitudinal axis, The pair of inverters are, A pair of support arms are positioned to protrude upward from the base, forming a support area between them that supports the steel material, A sprocket is rotatably positioned above and below the pair of support arms, The system comprises a chain of continuous tracks mounted on the sprocket, with slack regions formed in the support region, which are positioned to hang down from the upper ends of the opposing pair of support arms. The pair of reversing machines are configured such that the chain is driven to rotate the steel material around its longitudinal axis, with the chain supporting both ends of the steel material placed in the support area by the slack area of ​​the chain. Each of the pair of reversing machines has a structure in which at least one of the support arms is a tilting support arm, and the upper ends of the pair of support arms are tilted toward and toward each other via a tilting mechanism. The tilting mechanism is, A tilting shaft is formed by connecting the lower end of the tilting support arm to the base so as to be tiltable, The tilting support arm, connected by the tilting axis, is biased in a direction away from the opposing support arm by an elastic body, With no load of steel material applied to the slack region of the chain, the elastic force of the elastic body sets the tilting support arm to a non-tilted position. When the load of the steel material is applied to the slack region of the chain, the tilting support arm is set to an inclined position to narrow the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state. The tilting mechanism, in the driving state of the chain, changes the tilting position of the tilting support arm in accordance with the orientation of the steel material rotating around the axis, thereby changing the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state. The elastic body of the tilting mechanism is a coil spring which is a tension spring. A steel material inversion device comprising connecting one end of the coil spring to the middle part of the tilting support arm, and connecting the other end to a fixed arm that rises from the base outside the tilting support arm.

2. A steel material inversion device according to claim 1, A steel material reversing device comprising a coil spring connected to the tilting support arm or the fixed arm via an adjustment mechanism for adjusting its elastic force.

3. A steel material inversion device comprising a pair of inversion machines arranged at intervals, for supporting a steel material having a longitudinal axis in a horizontal position with the pair of inversion machines and rotating the steel material around its longitudinal axis, The pair of inverters are, A pair of support arms are positioned to protrude upward from the base, forming a support area between them that supports the steel material, A sprocket is rotatably positioned above and below the pair of support arms, The system comprises a chain of continuous tracks mounted on the sprocket, with slack regions formed in the support region, which are positioned to hang down from the upper ends of the opposing pair of support arms. The pair of reversing machines are configured such that the chain is driven to rotate the steel material around its longitudinal axis, with the chain supporting both ends of the steel material placed in the support area by the slack area of ​​the chain. Each of the pair of reversing machines has a structure in which at least one of the support arms is a tilting support arm, and the upper ends of the pair of support arms are tilted toward and toward each other via a tilting mechanism. The tilting mechanism is, A tilting shaft is formed by connecting the lower end of the tilting support arm to the base so as to be tiltable, The tilting support arm, connected by the tilting axis, is biased in a direction away from the opposing support arm by an elastic body, With no load of steel material applied to the slack region of the chain, the elastic force of the elastic body sets the tilting support arm to a non-tilted position. When the load of the steel material is applied to the slack region of the chain, the tilting support arm is set to an inclined position to narrow the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state. The tilting mechanism, in the driving state of the chain, changes the tilting position of the tilting support arm in accordance with the orientation of the steel material rotating around the axis, thereby changing the distance between the opposing upper ends of the slack region of the chain that supports the steel material in a suspended state. The pair of support arms are One of the support arms is the tilting support arm, The other support arm is fixed to the base as a fixed support arm. The aforementioned fixed support arm is fixed in a position where its upper end is tilted toward the tilting support arm, and this is a device for inverting steel materials.

4. A steel material inversion device according to claim 1, One of the pair of reversing machines is a drive-side reversing machine equipped with a drive mechanism for driving the chain mounted on the sprocket. The drive-side reversing machine drives the chain with the drive mechanism, causing the moving chain to rotate the steel material around its axis, A steel material reversing device in which the other of the pair of reversing machines is used as a driven reversing machine, and the chain of the driven reversing machine is driven via a steel material that rotates around an axis.

5. A steel material inversion device according to claim 1, A steel material reversing device comprising a support arm made of a square pipe, a base having a hollow section, and the chain stretched over the sprocket, with the area excluding the slack section designated as the tensioned area, and arranged inside the support arm and in the hollow section of the base.

6. A steel material inversion device according to any one of claims 1 to 5, further, It is equipped with a lifting platform positioned between the pair of reversing machines. With the lifting platform in the lowered position, the pair of reversing machines support the steel material by suspending both ends with the chains. A steel material inversion device in which, with the lifting platform in the raised position, the pair of inversion machines release the support state in which the steel material is suspended by the chain, and the central part of the steel material is supported by the lifting platform.

Images