Round steel material loading device and round steel material loading method

Abstract

To provide a loading technology for round steel material that enables round steel material to be loaded in an aligned manner and suppresses impact during transfer.SOLUTION: The round steel material loading device is for transporting round steel material S, consisting of steel bars with circular cross sections, to a rack 1 and stacking them on the rack 1. The device includes: an outer wall 2 that prevents the movement of the round steel material S loaded on the rack 1 to the outside of the loading side; a lifting mechanism that raises and lowers the outer wall 2; an inclined path 6 that extends toward the rack 1; a take-out mechanism 9 that stops the movement of the round steel material S rolling and guided to the inclined path 6 and releases the stoppage; a rail 11, which is a part that receives the round steel material S that the take-out mechanism 9 has released from the stoppage and is inclined so that the side of the rack 1 is downward and extends to the position where it overlaps the rack 1 in plan view; and a synchronizing mechanism that enables the inclined path 6 and the rail 11 to be raised and lowered in synchronization with the raising and lowering of the outer wall section 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a round steel loading device for transporting and loading round steel onto a rack, and a round steel loading method using the device.

Background Art

[0002] Round steel formed into a predetermined cross-section by hot rolling or cold rolling is cut to a predetermined length and transported to the next process such as a cooling process. The transportation to the next process is performed, for example, by a belt conveyor or a transfer rail to the next process. At this time, when stocking and unloading a certain amount of steel, or in the case of steel of a steel type that requires long-time cooling, it is necessary to load and store the steel outside the line so as not to become a process bottleneck. That is, for the purpose of air cooling or temporary storage, the transported steel may be stacked and stored (stocked) on a rack. Further, usually, when performing long-term air cooling, the steel is flatly arranged and stocked on a cooling bed or the like. At this time, due to space or other reasons, the steel is stacked and stored in a stepped manner.

[0003] Ordinary steel materials such as ordinary steel have magnetism. Therefore, when transporting to a storage location, it is possible to lift and transport and stack the steel materials with a lifter magnet. However, steel materials such as high-chromium steel materials do not have magnetism at high temperatures. Such steel materials with no or little magnetism during transportation cannot be transported and stacked by a lifter magnet. Further, in the stacking method using a lifter magnet, it is difficult to transport each steel material to an accurate loading position. Also, the loading work takes time.

[0004] Therefore, as a method of transporting and loading steel materials regardless of the presence or absence of magnetism of the steel materials to be stacked, a method of transporting the steel materials using a transport device such as a belt conveyor or a crane is conceivable. At this time, conventionally, the transported steel materials are stacked by dropping or rolling them from a position higher than the loading surface for transfer. As such a stacking device, for example, there is a device described in Patent Document 1.

[0005] The aligning and stacking device described in Patent Document 1 includes a first conveyor that sequentially conveys a plurality of steel bars, and a second conveyor that protrudes outward from the end portion of the first conveyor. In Patent Document 1, for the second conveyor, the installation height and conveyance speed of the conveyance belt (upward running belt) are set lower than those of the first conveyor. Further, the diameter of the pulley on the end side of the second conveyor is set smaller than that of the first conveyor. In the method of Patent Document 1, when transferring from the first conveyor to the second conveyor, the steel bars may be in an inclined posture. However, it is described that this can be solved by suppressing the conveyance speed when transferring the steel bars on the conveyor. The reason is that even if the steel bars are in an inclined posture, they can be brought into an aligned posture parallel to each other by contacting the side surface of the previously transferred steel bars. Also, Patent Document 1 describes that the drop height from the second conveyor to the stacking surface at the stacking upper part can be made a relatively short distance.

[0006] Also, Patent Document 2 describes a steel pipe stacking device that conveys steel pipes to a rack by an inclined running rail and stacks the steel pipes on the rack. In Patent Document 2, by applying braking to the steel pipes conveyed on the running rail by a magnetic field generating device provided on the running rail, the movement of the steel pipes conveyed to the rack is decelerated. Further, in Patent Document 2, the position of a steel pipe fall prevention guide arranged in front of the rack is fixed, and the rack on which the steel pipes are stacked has a structure that can be lifted and lowered. And in Patent Document 2, the rack is lowered according to the stacking of the steel pipes.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] The conveyance of steel materials by a conveyor can continuously convey the steel materials. However, in Patent Document 1, in order to reduce the drop when the bar steel falls onto the loading surface, the bar steel is transferred between two different conveyors. However, since it is being conveyed by a conveyor, just transferring between two conveyors is likely to result in a drop (level difference) greater than a predetermined value when transferring the bar steel onto the loading surface. And the greater this drop, the greater the impact generated when the bar steel to be transferred next contacts the loading surface such as the bar steel already stacked or the floor surface of the rack. Thus, there is a problem that the greater the drop during transfer, the greater the risk of scratches on the surface layer of the bar steel. However, in Patent Document 1, the more the drop is to be reduced, the more necessary it is to increase the number of conveyors for transfer, and accordingly, the device configuration becomes more complicated.

[0009] Also, when the bar steel to be stacked is round steel, the posture of the bar steel is likely to change when transferring between conveyors. That is, when the bar steel is round steel, in the method of conveying the bar steel by transferring between belt conveyors as in Patent Document 1, there is also a risk that the posture of the round steel will change significantly due to the drop when transferring between conveyors. If the posture of the round steel to be transferred changes significantly, there is a risk that the round steel cannot be stacked on the loading surface in an aligned posture. Thus, in the method of conveying round steel by a belt conveyor and transferring it to the loading surface, in addition to the difficulty of precise handling of each piece, there is a problem that there is a risk of scratches on the steel material due to the impact during conveyance and stacking.

[0010] In addition, the rack lifting type loading device as described in Patent Document 2 has the following problems. That is, when providing a lifting mechanism for the rack, the degree of dependence on the rack shape increases, and there is a risk that the loading capacity of the rack and the loading state of the load will be limited. Also, when providing a lifting function for the rack, it may be difficult to provide a steel material handling mechanism inside the rack. That is, when providing a conveyor and a binding mechanism around the rack in addition to the lifting mechanism, it is necessary to consider that the binding mechanism etc. does not interfere with the lifting mechanism, and the design becomes limited.

[0011] In addition, the weight of the rack increases according to the loading amount on the rack. Therefore, it is necessary to design the lifting mechanism with the maximum load on the rack, and there is a concern that the lifting mechanism may be over-specified. As a result, extra costs are incurred for manufacturing costs and securing spare parts.

[0012] In addition, when the rack is lifted or lowered, the steel pipes after loading are displaced vertically. Therefore, every time the rack is driven, vibration occurs in the steel pipes, and there is a risk that the surface of the steel pipes will be damaged. In addition, when the rack is lifted or lowered, there are also problems with maintainability. For example, when the rack becomes inoperable, there is a problem that the lifting mechanism cannot be repaired unless all the steel pipes in the rack are removed.

[0013] The present invention has been made paying attention to the above points, and an object thereof is to provide a loading technique for round steel materials that can align and load round steel materials and suppress the impact during transfer.

Means for Solving the Problems

[0014] In order to solve the problems, one aspect of the present invention is a round steel material loading device for conveying round steel materials made of bar steel having a circular cross-section to a rack and stacking them on the rack, which is disposed on the loading side of the rack and extends vertically, and prevents the round steel materials stacked on the rack from moving outward on the loading side, a lifting mechanism for lifting and lowering the outer wall portion, an inclined path that extends toward the rack and is inclined so that the rack side is downward, and is provided on the tip side of the inclined path, and a carry-out mechanism that stops and releases the movement of the round steel material that has rolled while being guided on the inclined path, and a component that receives the round steel material whose movement has been released by the carry-out mechanism on the tip side of the inclined path, and is inclined so that the rack side is downward and extends to a position overlapping the rack in plan view, a rail, and a synchronization mechanism that enables the inclined path and the rail to be lifted and lowered in synchronization with the lifting and lowering of the outer wall portion. It is a round steel material loading device provided with.

Effects of the Invention

[0015] According to an aspect of the present invention, regardless of the presence or absence of magnetism in the round steel material, the round steel materials can be aligned and loaded onto the rack, and it is possible to suppress the generation of scratches on the surface layer of the round steel material by suppressing the impact during transfer. At this time, when raising and lowering the outer wall portion according to the stacking state of the round steel materials on the rack, the inclined path and the rail are also raised and lowered synchronously. For this reason, by adjusting the height of the outer wall portion, it is possible to automatically set the heights of the inclined path and the rail near the height of the next stacking surface on the rack. In addition, since it is not necessary to raise and lower the rack when loading the round steel materials, unnecessary vibration is not given to the loaded round steel materials.

[0016] Further, according to an aspect of the present invention, even if the steel material to be stacked is a round steel material, the round steel material that has rolled along the inclined path can be temporarily stopped and then moved to the rack side by the unloading mechanism. As a result, after positioning the posture of the round steel material to be loaded at the correct position, it is possible to unload the round steel materials one by one to the rack side. Thereby, it is possible to stack the round steel materials on the rack more reliably. Also at this time, by setting the gradient of the rail to be small, it is possible to suppress the rolling speed of the round steel material when transferring it to the rack, that is, to suppress the moving speed during transfer.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0018] Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the round steel material loading device of the present embodiment is a loading device for sequentially transporting round steel materials S made of bar steel having a circular cross-section to the rack 1 and stacking them on the rack 1. Note that the round steel material S is also simply referred to as the steel material. Also, the position on the rack 1 for transferring the round steel material S is called the loading surface. The loading surface is composed of the floor surface of the rack 1 or the upper surface portion of the uppermost row of the round steel materials S previously loaded on the rack 1.

[0019] (Configuration) As shown in FIG. 1, the rack 1 of the present embodiment includes a floor portion 1A for stacking the round steel materials S and a rear frame 1B. The floor portion 1A has an outer peripheral contour in a rectangular shape whose dimension in the longitudinal direction is longer than the length of the round steel material S to be stacked, as shown in FIG. 2. However, as long as the round steel material S can be stably accommodated in the rack 1, the dimension of the floor portion 1A in the longitudinal direction may be shorter than the length of the round steel material S.

[0020] Note that the floor portion 1A does not necessarily have to be composed of a single flat plate-like member. The floor portion 1A may be composed of, for example, a plurality of members provided at predetermined intervals along the longitudinal direction. For example, the surface defined by the upper surfaces of the plurality of members is set to be a single horizontal plane. The rear frame 1B is a member that is located on the rear side with respect to the floor portion 1A and constitutes a wall for preventing the stacked round steel materials S from moving to the rear side of the floor portion 1A. The rear frame 1B also does not necessarily have to be composed of a single flat plate-like member. There is no problem as long as the movement of the stacked round steel materials S can be prevented.

[0021] In the present embodiment, the loading side of the rack 1 that faces the rear frame 1B is open. The loading side for loading the steel material into the rack 1 is the right side of the rack 1 in FIG. 1. The round steel material S loading device of the present embodiment is arranged at that right side position.

[0022] <Round Steel Material Loading Device> The round steel material loading device of the present embodiment includes an outer wall portion 2, a lifting mechanism, an inclined path 6, a synchronization mechanism, a carry-out mechanism 9, and a rail 11.

[0023] <Outer Wall Portion 2> The outer wall portion 2 is disposed on the loading side of the rack 1 and also serves as the outer frame of the rack 1. The outer wall portion 2 is arranged opposite to the rear frame 1B and is configured to move up and down by an elevating mechanism. In the initial position (the lowermost position), as shown by the two-dot chain line in FIG. 1, the upper end portion of the outer wall portion 2 is set to be flush with the upper surface of the floor portion 1A (the loading surface of the round steel S). The outer wall portion 2 is supported by the rack 1 so as to be movable upward from this initial position. Note that the support portion for guiding the outer wall portion 2 up and down may be configured separately from the rack 1. The outer wall portion 2 can prevent the round steel S stacked on the floor portion 1A of the rack 1 from moving to the loading side. Also, the upper end portion of the outer wall portion 2 can be arranged at the height for transferring the round steel S or in the vicinity thereof. That is, the outer wall portion 2 is displaced upward so that the upper end portion becomes the same height as or in the vicinity of the loading surface according to the stacking of the round steel S on the rack 1.

[0024] <Elevating mechanism> The elevating mechanism is a mechanism for elevating the outer wall portion 2. The elevating mechanism of the present embodiment includes a horizontal member 3 and an elevating device 4. One end of the horizontal member 3 is fixed to the outer wall portion 2, and it is a member that extends horizontally in a direction away from the outer wall portion 2. The elevating device 4 is the main body portion of the elevating mechanism for elevating the horizontal member 3. The elevating device 4 includes, for example, a rod 4A with its axis oriented vertically and its upper end connected to the horizontal member 3, and a mechanism for advancing and retracting the rod 4A up and down. The elevating device 4 is composed of a known elevating device 4 such as a cylinder device or an elevating jack device.

[0025] <Inclined path 6> An inclined path 6 is disposed above the horizontal member 3. The inclined path 6 extends toward the rack 1. Specifically, the upper surface (guide surface 6a) of the inclined path 6 has an inclination with the rack 1 side being downward. In the inclined path 6 of the present embodiment, the tip portion on the rack 1 side is located in front of the outer wall portion 2. In this embodiment, a second inclined path 7 that can be continuous with the inclined path 6 is provided on the rear end side of the inclined path 6. The round steel material S is sent to the inclined path 6 via the second inclined path 7. The round steel material S is sequentially sent to this second inclined path 7 by a conveying mechanism (not shown). A stopper 8 is provided on the front end side of the second inclined path 7. The stopper 8 is configured to be able to move up and down vertically. The stopper 8 is designed to protrude above the guide surface of the second inclined path 7 in the raised state and to be at a height below the guide surface of the second inclined path 7 in the lowered state.

[0026] When the heights of the rear end of the inclined path 6 and the front end of the second inclined path 7 are equal, the stopper 8 descends, and the configuration is such that the round steel material S is conveyed from the second inclined path 7 toward the inclined path 6.

[0027] Here, the inclined path 6 has a length that can accommodate one row or more of round steel materials S loaded on the rack 1. And when transferring one row of round steel materials S to the rack 1, it is set to move up and down so that the rear end of the inclined path 6 becomes equal to the height of the front end of the second inclined path 7.

[0028] <Synchronization mechanism> The inclined path 6 is supported by the gantry 5. The gantry 5 is supported by the horizontal beam 3 via a column member 16 erected from the horizontal beam 3. This column member 16 constitutes a synchronization mechanism. And due to the lifting of the horizontal beam 3 driven by the lifting mechanism, the outer wall portion 2 and the inclined path 6 are configured to move up and down in synchronization. Thereby, the inclined path 6 can move up and down in synchronization with the outer wall portion 2. Separate from the lifting mechanism for lifting the outer wall portion 2, there may be another lifting mechanism for lifting the inclined path 6, and the two lifting mechanisms may be set to move up and down in synchronization. In this case, it is preferable to set the inclined path 6 to move up and down separately from the outer wall portion 2 only when conveying the round steel material S from the second inclined path 7 to the inclined path 6.

[0029] Here, as shown in FIG. 2, a plurality of sets of inclined paths 6 and the like are arranged along the longitudinal direction of the round steel material S to be conveyed. In FIG. 1, the case where four sets of inclined paths 6 and the like are provided is illustrated.

[0030] Also, in the present embodiment, the plurality of inclined paths 6 are supported by the same horizontal member 3, and the plurality of sets of inclined paths 6 are configured to move up and down in synchronization. In FIG. 1, the gantry 5 is also a common member for a plurality of sets, but the gantry 5 may be provided separately for each set of inclined paths 6 and the like.

[0031] <Unloading mechanism 9> The unloading mechanism 9 is provided on the tip end side of the inclined path 6, and is a mechanism part that temporarily stops the round steel material S that has been guided and rolled on the inclined path 6 and feeds out the round steel material S one by one. Specifically, the unloading mechanism 9 repeatedly stops and releases the movement of the rolling round steel material S.

[0032] The unloading mechanism 9 of the present embodiment includes, for example, a rotating shaft 9A and a rotating body 9B as shown in FIG. 3. The rotating shaft 9A is a shaft member that extends in the lateral direction perpendicular to the guiding direction of the inclined path 6 at a position below the guiding surface 6a of the inclined path 6. The lateral direction is the direction along the longitudinal direction of the round steel material S. The rotating body 9B is a member whose central portion is attached to the rotating shaft 9A in a posture perpendicular to the rotating shaft 9A, and the upper portion thereof protrudes above the guiding surface 6a of the inclined path 6. The rotating body 9B is formed by arranging a plurality of partition portions 9Ba that project outward in the radial direction of the rotating shaft 9A along the circumferential direction of the rotating shaft 9A. And the space between two adjacent partition portions 9Ba is an interval in which one round steel material S can be arranged, and the tip end portion of at least one partition portion 9Ba is arranged to protrude above the guiding surface 6a of the inclined path 6.

[0033] The rotating body 9B of the present embodiment is a disk body in which a center is fixed to the rotating body 9B, and a plurality of notches 9Bb having a radius larger than the radius of the round steel material S are formed along the circumferential direction.

[0034] However, the rotating body 9B does not necessarily have to be a disk body having the notch 9Bb as described above. For example, the rotating body 9B may be composed only of a partition portion 9Ba that radially protrudes from the rotation axis 9A in the outer diameter direction. The rotation axis 9A of the present embodiment is rotatable by chain drive. Reference numeral 15 indicates a chain that transmits power to the rotation axis 9A, and reference numeral 10 indicates a chain drive device that drives the chain 15.

[0035] Here, the carry-out mechanism 9 does not necessarily have to be configured using the rotating body 9B as described above. Another mechanism that can repeatedly stop and release the movement of the rolled steel material S that has rolled and send out the rolled steel materials S one by one may be adopted. For example, it may be composed of two elevating stoppers arranged along the extending direction of the inclined path 6. The distance between the two stoppers may be set to correspond to the diameter of the rolled steel material S, and they may be alternately elevated and lowered.

[0036] In the present embodiment, as shown in FIG. 2, the case where the carry-out mechanism 9 is arranged on the side of the tip of the inclined path 6 is illustrated, but it is not limited thereto. For example, the inclined path 6 may be composed of two rail members arranged at intervals from each other, and the carry-out mechanism 9 may be provided between the two rail members. It is preferable that a plurality of carry-out mechanisms 9 arranged in the horizontal direction have a synchronization mechanism that operates in conjunction.

[0037] <Rail 11> The rail 11 is a rail member that receives the rolled steel material S whose rolling has been temporarily stopped and the stop of which has been released on the tip side of the inclined path 6. The rail 11 extends toward the rack 1 side, and the tip side of the rail 11 extends into the rack 1 in plan view. The thickness of the tip of the rail 11 is, for example, equal to or less than the radius of the rolled steel material S to be conveyed. The thinner the thickness of the tip of the rail 11 is, the better as long as rigidity can be ensured. For example, the thickness of the tip of the rail 11 may be set to a thickness such that no scratches are generated on the surface layer of the round bar steel S due to dropping during transfer, and may be appropriately set according to the specifications of the rolled steel material S to be conveyed and the rigidity of the rail 11. A buffer material made of a resin plate or the like that protrudes downward is attached to the lower surface of the tip of the rail 11. The thickness of the tip of the rail 11 depends on the rigidity of the tip of the rail 11, but is, for example, set to be equal to or less than the radius of the round steel material S conveyed including the buffer material.

[0038] Here, the lower surface of the rail 11 is a horizontal plane. The rail 11 is supported by the gantry 5. As a result, the rail 11 can move up and down in synchronization with the inclined path 6 and the outer wall. Further, the rail 11 is supported by the upper end portion of the outer wall portion 2 so as to be movable forward and backward.

[0039] Here, the guide surface 11a of the rail 11 is provided with an inclination that becomes downward toward the tip. However, the gradient of the rail 11 is smaller than the gradient of the inclined path 6. As a result, the rolling speed of the round steel material S transferred from the inclined path 6 via the unloading mechanism 9 can be slowed down. Note that the gradient of the guide surface 11a of the rail 11 may be set to become smaller toward the tip.

[0040] Further, on the tip side of the inclined path 6, the guide surface 11a of the rail 11 is set to be equal to or approximately equal to the guide surface 11a of the inclined path 6 in height. Preferably, the height of the rail 11 and the height of the inclined path 6 are set to be equal on the side of the rack 1 with respect to the position of the unloading mechanism 9 or at a position closer to the rack 1 than that position. In this case, in a side view, the guide surface 6a of the inclined path 6 and the guide surface 11a of the rail 11 intersect at the position of the unloading mechanism 9 or in the vicinity thereof. Then, at a position past the intersection point, the round steel material S can be smoothly transferred from the inclined path 6 to the rail 11.

[0041] Note that, as will be described later, even if the rail 11 is configured to be movable forward and backward, behind the above intersection point, the height of the rail 11 becomes lower than that of the inclined path 6, so that it is possible to prevent the retracted rail 11 from interfering with the guiding of the steel plate by the inclined path 6. In addition, in the present embodiment, as shown in FIG. 2, the rail 11 is arranged offset with respect to the inclined path 6, but in a plan view, it may be arranged such that the extending direction of the inclined path 6 and the extending direction of the rail 11 overlap.

[0042] <Rail advancing and retracting mechanism 13> The rail 11 is preferably capable of advancing and retracting in the extending direction. In the present embodiment, a rail advancing and retracting mechanism 13 for advancing and retracting the rail 11 is provided. When the rail 11 is made capable of advancing and retracting, as described above, it is preferable to support the rail 11 on the upper end surface 2A of the outer wall portion 2 in a state where it can advance and retract. At this time, a notch 9Bb is formed in the portion of the upper end surface 2A of the outer wall portion 2 that guides the rail 11, and it is preferable to configure the notch 9Bb so that the rail 11 can surely advance and retract in the extending direction. In the present embodiment, the rail 11 is configured to be advanced and retracted by a linear motion guide device provided on the gantry 5. The rail 11 may be advanced and retracted by a known driving method.

[0043] (Operation and others) The round steel material loading device of the present embodiment operates as follows, for example. The description will start from the state where the rack 1 is empty. Also, it is assumed that the round steel materials S are sequentially transferred to the second inclined path 7.

[0044] First, the inclined path 6 is moved to a height where it can be continuous with the second inclined path 7. Then, by lowering the stopper 8, a plurality of round steel materials S placed on the second inclined path 7 roll toward the inclined path 6 side. As a result, a plurality of round steel materials S are placed on the inclined path 6. At this time, the foremost round steel material S contacts the partition portion 9Ba of the unloading mechanism 9 and is prevented from moving, so that a plurality of round steel materials S are placed on the inclined path 6 in a lined-up state. The number of round steel materials S placed on the inclined path 6 is set to be equal to or more than one row to be transferred to the rack 1.

[0045] Here, regarding the unloading mechanism 9, the position where one of the partition portions 9Ba is located above the rotating shaft 9A is set as the initial position. In this state, the partition portion 9Ba extending straight upward serves as a stopper. That is, the leading round steel material S among the round steel materials S transferred from the second inclined path 7 and rolling into contact with the partition portion 9Ba extending straight upward above it, and the movement of the round steel material S is reliably restricted. When a predetermined amount or more of round steel materials S are placed on the inclined path 6, the stopper 8 is raised to prevent the movement of the round steel materials S from the second inclined path 7 to the inclined path 6.

[0046] After that, the outer wall portion 2 and the inclined path 6 are lowered to the initial position shown by the two-dot chain line in FIG. 1. At this time, the rail 11 also descends together. Also, as shown by the two-dot chain line in FIG. 1, the tip of the rail 11 is positioned at a position retracted by the equivalent of one round steel material S from the rear frame 1B in the extending direction. This position in the extending direction is set as the initial position of the rail 11. At this time, the lower surface of the rail 11 reaches a height where it contacts the upper surface of the floor portion 1A, but the buffer material at the tip of the rail 11 contacts the floor portion 1A material, preventing the rail 11 from directly contacting the floor portion 1A.

[0047] Next, when the rotating body 9B of the unloading mechanism 9 is rotated by 45 degrees, as shown in FIG. 1, one round steel material S is positioned between the two inclined partition portions 9Ba. When it is continuously rotated by 45 degrees, the one round steel material S is sent out, and the round steel material S is guided by the rail 11 and transferred to the rack 1. At this time, since the thickness of the tip of the rail 11 is equal to or less than the radius of the round steel material S, the drop during the transfer to the rack 1 can be set small, and the round steel material S can be transferred to the rack 1 with a small impact.

[0048] In this way, every time the rotating body 9B of the unloading mechanism 9 is rotated by 90 degrees (=(45 degrees + 45 degrees)), one round steel material S is guided by the rail 11 and transferred to the rack 1. Therefore, the time required to rotate the rotating body 9B by 90 degrees is set to, for example, the maximum time required for one round steel material S to be guided by the rail 11 and transferred to the rack 1.

[0049] Then, every time the round steel S is guided and transferred along the rail 11, the rail 11 is retracted by the diameter of the round steel S.

[0050] After the transfer of one row of round steel S is completed, the outer wall portion 2 and the inclined path 6 are raised once to the position shown by the solid line in FIG. 1, and a plurality of round steel S are transferred from the second inclined path 7 to the inclined path 6 by rolling as described above. Then, the upper end of the outer wall portion 2 is lowered to a position where it is at or near the height of the stacking surface R formed by the upper surface of the round steel S currently stacked on the rack 1. Then, as described above, the transfer of one row of round steel S to the rack 1 is executed. Note that the rigidity of the rail 11 may be configured to bend slightly up and down so that even if the upper end of the outer wall portion 2 is slightly higher than the stacking surface R, the tip of the rail 11 may be near the stacking surface R.

[0051] By repeating the above operations, the rack 1 is executed until the round steel S is stacked by the target number of stages.

[0052] As described above, according to the apparatus of the present embodiment, the steel material can be transported and transferred regardless of the presence or absence of magnetism of the round steel S. In addition, each round steel S can be stacked at an arbitrary position on the rack 1, and the impact when stacking each round steel S can be suppressed, and it is possible to prevent the surface layer of the round steel S to be transferred from being scratched.

[0053] In addition, the inclined path 6 capable of holding a plurality of round steel materials moves up and down in synchronization with the outer wall portion 2. As a result, the round steel S can be arbitrarily transported according to the height stacked on the rack 1 without being lifted from the ground. In addition, the rail 11 with a gentle inclination can be stopped at an arbitrary position, and the unloading mechanism 9 capable of unloading the steel materials one by one can be driven independently. As a result, each round steel S can be accurately transferred onto the rack 1.

[0054] At this time, by providing a buffer material on the lower surface of the tip of the rail 11, it was devised so that the round steel material S stacked previously and the rail 11 do not come into direct contact. By this, it is possible to prevent surface flaws from being attached to the upper surface of the round steel material S stacked previously by the advancing and retreating rail 11.

[0055] Here, by increasing the gradient of the inclined path 6 with respect to the gradient of the rail 11, the time for transferring a plurality of round steel materials S from the second inclined path 7 to the inclined path 6 can be shortened. Also, by decreasing the gradient of the rail 11, the rolling speed of the round steel material S rolling on the rail 11 is suppressed, and the speed of the round steel material S at the time of transfer from the rail 11 to the rack 1 is suppressed, and the impact at the time of transfer can be mitigated.

[0056] Also, the gradient of the rail 11 is made smaller than the gradient of the inclined path 6, and at the position of the rotating body 9B or in its vicinity, the height of the guide surface 11a of the rail 11 and the height of the inclined path 6 are set to the same height. In this case, it is possible to eliminate the drop at the time of transfer from the inclined path 6 to the rail 11, and even if the rail 11 can advance and retreat in the extending direction, unnecessary interference between the rail 11 and the inclined path 6 can be prevented.

[0057] Also, in the present embodiment, there is no need to provide an unnecessary mechanism such as a lifting mechanism on the rack 1 itself. For this reason, there are no particular restrictions on the rack shape and the handling mechanism of the round steel material S loaded on the rack 1. Therefore, the rack shape can be freely changed according to the quantity scheduled to be loaded and stored on the rack 1 and the diameter of the round steel material S. That is, the rack 1 can be easily changed according to the application. For this reason, even when the operating situation changes and the storage quantity increases or decreases or the shape changes, it is possible to easily respond by simply changing the capacity and shape of the rack 1. And as the rack 1, a conventionally known rack 1 may be used.

[0058] Also, in the present embodiment, since the maximum amount of round steel materials S that can ride on the inclined path 6 is clear, it is easy to grasp the minimum necessary capacity for lifting, and appropriate strength design and spare parts management can be performed. Therefore, reduction of design costs and repair costs can also be achieved. Also, when the rack 1 itself is lifted and lowered for loading, in addition to the vibration and impact on the round steel S during transportation and loading, there is a concern about the adverse effects caused by the vibration during the lifting and lowering of the rack 1 within the rack 1. In contrast, in the present embodiment, the vibration applied to the round steel S is only the vibration when rolling on the inclined path 6 and the rail 11, and there is no particular concern about impact on the round steel S during storage after being loaded on the rack 1. Therefore, the risk of damage to the surface of the round steel S can be reduced accordingly.

[0059] In the case of a device for lifting and lowering the rack 1 for loading, when the lifting and lowering function becomes inoperable, it is necessary to remove the round steel S corresponding to the maximum load capacity on the rack 1 from the rack 1 at worst. In contrast, in the present embodiment, when the lifting device fails, maintenance can be performed by removing at most the round steel S for one row, so repair can be performed in a short time with a low load.

[0060] (Other) The present disclosure may also have the following configuration. (1) A round steel loading device for transporting a round steel made of a bar steel with a circular cross-section to a rack and stacking it on the rack, An outer wall portion that is disposed on the loading side of the rack and extends vertically to prevent the loaded round steel on the rack from moving outward on the loading side; A lifting mechanism for lifting and lowering the outer wall portion; An inclined path that extends toward the rack and is inclined so that the rack side is downward; A unloading mechanism that is provided on the tip side of the inclined path and stops and releases the movement of the round steel that has rolled along the inclined path; A component that receives the round steel whose movement has been released by the unloading mechanism on the tip side of the inclined path, and is inclined so that the rack side is downward and extends to a position overlapping the rack in plan view; a rail; A synchronization mechanism that enables the inclined path and the rail to be lifted and lowered in synchronization with the lifting and lowering of the outer wall portion; A round steel loading device, characterized by comprising the above. The thickness of the tip of the rail is, for example, equal to or less than the radius of the round steel within a range where the rigidity of the rail can be ensured. (2) It is provided with a rail advancing and retreating mechanism for advancing and retreating the above-mentioned rail along the extending direction. (3) A plurality of sets of the above-mentioned inclined path, the above-mentioned unloading mechanism, and the above-mentioned rail are arranged at intervals in the longitudinal direction of the round steel material to be conveyed. (4) A buffer material is attached to the lower surface of the tip of the above-mentioned rail so as to protrude downward from the lower surface. The thickness of the above-mentioned rail is, for example, equal to or less than the radius of the above-mentioned round steel material including the above-mentioned buffer material. (5) The above-mentioned unloading mechanism A rotating shaft extending in the lateral direction orthogonal to the guiding direction of the above-mentioned inclined path, below the guiding surface of the above-mentioned inclined path, and A rotating body with its central part attached to the above-mentioned rotating shaft and the upper part protruding above the guiding surface of the above-mentioned inclined path, and is provided with On the above-mentioned rotating body, a plurality of partition parts protruding radially outward from the above-mentioned rotating shaft are arranged along the circumferential direction of the above-mentioned rotating shaft, and the space between two adjacent partition parts is an interval in which one round steel material can be arranged, and at least the tip side of one partition part is arranged to protrude above the guiding surface of the above-mentioned inclined path. (6) The above-mentioned rotating body is composed of a disk body in which a plurality of notches with a radius larger than the radius of the above-mentioned round steel material are formed along the circumferential direction. (7) The above-mentioned synchronization mechanism is configured by connecting the above-mentioned outer wall part to the above-mentioned inclined path and the above-mentioned rail. (8) The gradient of the above-mentioned rail is smaller than the gradient of the above-mentioned inclined path, and at the position of the above-mentioned unloading mechanism or at a position closer to the rack side than that position, the heights of the guiding surface of the above-mentioned rail and the guiding surface of the above-mentioned inclined path are set to be equal. (9) A method for stacking round steel materials, which are made of round bar steel with a circular cross-section, sequentially conveyed to a rack and stacked on the rack, comprising using the round steel material stacking device according to claim 1, raising the above-mentioned outer wall part, the above-mentioned inclined path, and the above-mentioned rail in accordance with an increase in the number of stacking stages of the round steel materials on the above-mentioned rack. (10) A method for stacking round steel materials, which are made of round bar steel with a circular cross-section, sequentially conveyed to a rack and stacked on the rack, comprising Using the round steel loading device according to claim 2, as the number of loading stages of round steel on the rack increases, raise the outer wall portion, the inclined path, and the rail, and move the rail forward and backward according to the position where the next round steel is to be transferred in plan view. (11) Set the height of the lower surface of the rail to the height of the position where the next round steel is to be transferred or in the vicinity thereof.

Explanation of Signs

[0061] 1 Rack 1A Floor portion 1B Rear frame 2 Outer wall portion 3 Cross member 4 Lifting device 4A Rod 5 Stand 6 Inclined path 6a Guide surface 8 Stopper 9 Unloading mechanism 9A Rotating shaft 9B Rotating body 9Ba Partition portion 9Bb Notch 11 Rail 11a Guide surface 13 Rail advancing / retreating mechanism 16 Column member S Round steel

Claims

1. A round steel material loading device for transporting a round steel material made of a bar steel with a circular cross-section to a rack and stacking it on the rack, comprising: An outer wall portion disposed on the loading side of the rack and extending vertically to prevent the round steel material stacked on the rack from moving outward on the loading side; A lifting mechanism for lifting and lowering the outer wall portion; An inclined path extending toward the rack and inclined such that the rack side is downward; A carry-out mechanism provided on the tip end side of the inclined path for stopping and releasing the movement of the round steel material that has rolled while being guided on the inclined path; A component for receiving the round steel material whose movement has been released by the carry-out mechanism on the tip end side of the inclined path, the component being inclined such that the rack side is downward and extending to a position overlapping the rack in plan view, and a rail; A synchronization mechanism for enabling the inclined path and the rail to be lifted and lowered in synchronization with the lifting and lowering of the outer wall portion; A round steel material loading device characterized by comprising the above.

2. The round steel material loading device according to claim 1, further comprising a rail advancing and retreating mechanism for advancing and retreating the rail along the extending direction. The round steel material loading device according to claim 1, characterized in that.

3. The round steel material loading device according to claim 1, characterized in that a plurality of sets of the combination of the inclined path, the carry-out mechanism, and the rail are arranged at intervals in the longitudinal direction of the round steel material to be transported. The round steel material loading device according to claim 1, characterized in that.

4. The round steel material loading device according to claim 1, characterized in that a buffer material is attached to the lower surface of the tip end of the rail so as to protrude downward from the lower surface. The round steel material loading device according to claim 1, characterized in that.

5. The carry-out mechanism is: A rotating shaft extending in a lateral direction orthogonal to the guiding direction of the inclined path at a position below the guiding surface of the inclined path; A rotating body with its central part attached to the rotating shaft and the upper part protruding above the guiding surface of the inclined path, and comprising, In the rotating body, a plurality of partition portions projecting radially outward from the rotating shaft are arranged along the circumferential direction of the rotating shaft, and the space between two adjacent partition portions is such that one round steel bar can be placed, and at least the tip end side of one partition portion is arranged to project above the guiding surface of the inclined path. The round steel bar loading device according to claim 1, characterized in that.

6. The rotating body is composed of a disk body in which a plurality of notches having a radius larger than the radius of the round steel bar are formed along the circumferential direction. The round steel bar loading device according to claim 5, characterized in that.

7. The synchronization mechanism is configured by connecting the outer wall portion to the inclined path and the rail. The round steel bar loading device according to claim 1, characterized in that.

8. The gradient of the rail is smaller than the gradient of the inclined path, At the position of the unloading mechanism or at a position on the rack side closer to the rack than that position, the height of the guiding surface of the rail and the guiding surface of the inclined path is set to be equal. The round steel bar loading device according to claim 1, characterized in that.

9. A round steel bar loading method for sequentially conveying round steel bars made of bar steel with a circular cross-section to a rack and stacking them on the rack, using the round steel bar loading device according to claim 1, raising the outer wall portion, the inclined path, and the rail in accordance with an increase in the number of stages of stacking round steel bars on the rack. The round steel bar loading method, characterized in that.

10. A round steel bar loading method for sequentially conveying round steel bars made of bar steel with a circular cross-section to a rack and stacking them on the rack, Using the round steel material loading device according to claim 2, As the number of loading stages of the round steel material on the rack increases, the outer wall portion, the inclined path, and the rail are raised, The rail is advanced and retracted according to the position where the next round steel material is to be transferred in plan view, A method for loading round steel materials, characterized by the above.

11. The height of the lower surface of the rail is set to the height of the position where the next round steel material is to be transferred, or in the vicinity of that height, The method for loading round steel materials according to claim 9 or claim 10, characterized by the above.

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