CN114380243B

CN114380243B - Overlength stacker device

Info

Publication number: CN114380243B
Application number: CN202111677752.8A
Authority: CN
Inventors: 徐孝琴; 杨海飞
Original assignee: Robo Technologiesautomation Suzhou Co ltd
Current assignee: Robo Technologiesautomation Suzhou Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-05-09
Anticipated expiration: 2041-12-31
Also published as: CN114380243A

Abstract

The invention discloses an ultra-long stacker device which comprises a frame, a cargo carrying mechanism, a lifting mechanism and a travelling mechanism, wherein the frame comprises two upright post structures positioned at two ends of the travelling direction of the frame, an upper connecting rod and a lower connecting rod which are arranged up and down are arranged between the two upright post structures, each of the two ends of the upper connecting rod and the lower connecting rod are respectively and flexibly connected with the two upright post structures so that the two upright post structures can float up and down relatively, the cargo carrying mechanism comprises a cargo carrying platform and two lifting brackets, the two ends of the cargo carrying platform are respectively and flexibly connected with the two lifting brackets so that the two ends of the cargo carrying platform can float up and down relatively, and the two lifting brackets are respectively and flexibly connected with the two upright post structures. The invention can float and self-regulate, can avoid the distortion of the integral structure, greatly reduce the requirement on the processing technology, reduce the manufacturing precision of the equipment, lighten the weight of the equipment and realize the change of the span of the ultra-long stacker device.

Description

Overlength stacker device

Technical Field

The invention belongs to the technical field of intelligent storage, and particularly relates to an ultra-long stacker device.

Background

The stacker is an important component of modern intelligent storage, mainly has the functions of carrying, storing, transferring and the like, has high warehouse-in and warehouse-out efficiency and wide application range, and is a trend of future sustainable development. At present, the storage unit of the stacker is mainly a tray and a feed box, the goods type is relatively regular, the size is also relatively conventional, the length is basically within 5m, the width is within 3m, and the height is within 3 m.

The popularity of the stacker is wider and wider, besides the application of the traditional industry, more and more steel, pipes, special steel and other production industries are added, and the industries are characterized by overlength and different lengths and heavy weights, so that the conventional stacker is difficult to apply to the occasion, even if special remanufacturing can cause serious deformation of the whole metal structure of the equipment, and the problem of shortened service life of the running structure occurs.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is how to avoid the distortion of the whole structure of the ultra-long stacker.

In order to solve the technical problems, the invention provides an ultra-long stacker device which comprises a frame, a cargo carrying mechanism which is connected to the frame in a lifting way and is used for carrying cargoes, a lifting mechanism which is arranged on the frame and drives the cargo carrying mechanism to lift, and a travelling mechanism which is arranged on the frame and drives the frame to travel,

the frame comprises two upright post structures positioned at two ends of the frame in the running direction, an upper connecting rod and a lower connecting rod which are arranged up and down are arranged between the two upright post structures, and two ends of each of the upper connecting rod and the lower connecting rod are respectively and flexibly connected with the two upright post structures so that the two upright post structures can float up and down relatively;

the cargo carrying mechanism comprises a cargo carrying platform and two lifting brackets, wherein two ends of the cargo carrying platform are respectively flexibly connected with the two lifting brackets so that two ends of the cargo carrying platform can relatively float up and down, and the two lifting brackets are respectively connected with the two upright post structures in a lifting manner.

In one embodiment of the invention, two ends of each of the upper connecting rod and the lower connecting rod are respectively hinged with the two upright post structures.

In one embodiment of the invention, a plurality of first connecting holes are respectively arranged at two ends of the cargo carrying platform, a plurality of second connecting holes are respectively arranged at two lifting brackets, and flexible connection is realized by the lifting brackets connected with each end of the cargo carrying platform through a plurality of hinge shafts penetrating through the plurality of first connecting holes and the plurality of second connecting holes.

In one embodiment of the invention, the whole upright post structure is in an inverted T shape and comprises an upright post body, an upper cross beam connected to the top of the upright post body and a lower cross beam connected to the bottom of the upright post body, wherein the upper connecting rods are respectively connected between the two upper cross beams, and the lower connecting rods are respectively connected between the two lower cross beams.

In one embodiment of the invention, the lifting support is provided with lifting guide wheels for guiding the lifting support to lift and match with lifting guide rails on the upright post structure.

In one embodiment of the invention, the top of each upright post structure is provided with a first walking guide wheel which guides the upright post structure to walk and is matched with the top rail, and the bottom of each upright post structure is provided with a second walking guide wheel which guides the upright post structure to walk and is matched with the ground rail.

In one embodiment of the invention, each lifting bracket is provided with a movable pulley, the upper end of each upright post structure is provided with a fixed pulley and one end of a steel wire rope is fixed, and the other end of each steel wire rope sequentially descends, bypasses the movable pulley, ascends, bypasses the fixed pulley and descends and then is connected to the lifting mechanism.

In one embodiment of the invention, the overlength stacker device comprises one lifting mechanism arranged on one of the upright post structures, the lifting mechanism is a double-drum winch, the double-drum winch comprises two drums for respectively winding two steel wire ropes and a first driving motor for driving the two drums to rotate, the other end of one steel wire rope sequentially descends, bypasses the movable pulley, ascends, bypasses the fixed pulley on one upright post structure and is connected with one drum after descending, and the other end of the other steel wire rope sequentially descends, bypasses the movable pulley, ascends, bypasses the fixed pulley on the two upright post structures and is connected with the other drum after descending.

In one embodiment of the invention, the ultra-long stacker device comprises two lifting mechanisms which are respectively arranged on the two upright post structures, wherein the lifting mechanisms are single-drum winders, each single-drum windlass comprises a drum for winding one steel wire rope and a first driving motor for driving the drum to rotate, and the other end of each steel wire rope sequentially descends, bypasses the movable pulley, ascends and bypasses the fixed pulley on one upright post structure and then is connected with the drum after descending.

In one embodiment of the invention, the bottom of each upright post structure is provided with one travelling mechanism, and the travelling mechanism comprises two load wheels and a second driving motor for providing rotation power for the load wheels.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

1) According to the ultra-long stacker device, the upper connecting rod and the lower connecting rod which are flexibly connected with the upright post structure are arranged, so that the ultra-long stacker device can float and self-adjust, the distortion of the whole structure of the ultra-long stacker device can be avoided, the processing technology requirement of the ultra-long stacker device is greatly reduced, the manufacturing precision can be reduced, the weight is greatly reduced, the production cost can be reduced, and the span change of the ultra-long stacker device can be realized by changing the lengths or the structural forms of the upper connecting rod and the lower connecting rod;

2) According to the ultra-long stacker device provided by the invention, the cargo carrying platform and the lifting support are hinged through the plurality of hinge shafts, so that the cargo carrying platform and the lifting support can have a certain degree of relative displacement, and the connection strength between the cargo carrying platform and the lifting support is improved;

3) According to the ultra-long stacker device provided by the invention, the lifting mechanism adopts the movable pulley structure, so that half of lifting force can be saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.

Fig. 1 is a schematic structural diagram of an ultralong stacker disclosed in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view at B in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

FIG. 5 is a partial enlarged view at D in FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 1 at E;

FIG. 7 is an enlarged view of a portion of FIG. 1 at F;

FIG. 8 is a partial enlarged view at G in FIG. 1;

fig. 9 is a schematic structural diagram of an ultralong stacker disclosed in the second embodiment of the present invention.

11, a column structure; 111. a column body; 112. an upper cross beam; 113. a lower cross beam; 12. lifting the guide rail; 13. a first travel guide wheel; 14. a second walking guide wheel; 15. a fixed pulley; 21. a cargo bed; 22. a lifting bracket; 23. a third hinge shaft; 24. lifting guide wheels; 25. a fork assembly; 26. safety tongs; 27. a speed limiter; 28. a movable pulley; 31. an upper connecting rod; 32. a lower connecting rod; 33. a first hinge shaft; 34. a second hinge shaft; 41. a top rail; 42. a ground rail; 51. a wire rope; 52. a reel; 53. a first driving motor; 54. a spool shield; 61. a load wheel; 62. a second driving motor; 7. a safety ladder; 8. a top maintenance platform; 9. an operating table.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples.

It should be noted that the following detailed description is illustrative and is intended to provide further details of improvement for the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof. In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, are merely relational terms determined for convenience in describing structural relationships of the various components or elements of the present disclosure, and do not denote any one of the components or elements of the present disclosure, and are not to be construed as limiting the present disclosure. In the present disclosure, terms such as "fixedly coupled," "connected," and the like are to be construed broadly and refer to either an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the disclosure may be determined according to circumstances, and should not be interpreted as limiting the disclosure, for relevant scientific research or a person skilled in the art.

The following is a preferred embodiment for illustrating the present invention, but is not intended to limit the scope of the present invention.

Example 1

Referring to fig. 1-8, as shown in the legend therein: the utility model provides an overlength stacker device, including the frame, liftable connect in above-mentioned frame and be used for carrying cargo the mechanism that carries cargo, install in above-mentioned frame and drive the elevating system that carries cargo the mechanism and install in above-mentioned frame and drive the running gear that above-mentioned frame walked, above-mentioned frame includes two stand structures 11 that are located its walking direction both ends, be equipped with upper connecting rod 31 and lower connecting rod 32 that arrange from top to bottom between two stand structures 11, the flexible connection of each both ends of two stand structures 11 that are mentioned above-mentioned upper connecting rod 31 and lower connecting rod 32 respectively makes two stand structures 11 can relatively float above-mentioned cargo carrying mechanism from top to bottom including a cargo carrying platform 21 and two lifting support 22, the both ends of two lifting support 22 respectively flexible connection of above-mentioned cargo carrying platform 21 make two ends of two lifting support 22 can relatively float from top to bottom, two stand structures 11 are connected to two lifting support 22 respectively can lift.

In the above technical solution, in the "flexible connection", the opposite connection members have a relationship of restraining or transmitting power, and may have a relative displacement to a certain extent. Flexible connections are relatively "rigid connections". In "rigid connection" there is no displacement between the opposing connection members, which is the connection in most fastenings. The two upright post structures 11 are flexibly connected with the upper connecting rod 31 and the lower connecting rod 32 respectively, the connecting mode can not only play a role in connection and transmission action, but also ensure stable operation under the state of an ultra-long span, and the errors between the two upright post structures 11 can be regulated by floating, so that the design can reduce the manufacturing precision of the whole ultra-long stacker device and simplify the manufacturing process, and the change of the span can be realized by changing the lengths or the structural forms of the upper connecting rod 31 and the lower connecting rod 32; the lifting support 22 is flexibly connected with the cargo table 21, so that the rotation capacity of the node is released while the transmission of shearing force is ensured, and the mode can avoid huge torsional deformation (similar to 'twist') generated by using an integral welding structure for an ultra-long span.

In a preferred embodiment of the present embodiment, two ends of each of the upper connecting rod 31 and the lower connecting rod 32 are respectively hinged to the two pillar structures 11. Hinged connection generally refers to the relative rotation of opposing links through a large angle. The generally opposed connectors are therefore hinged by a hinge shaft. Specifically, since the upper connecting rod 31 and the lower connecting rod 32 mainly serve the purpose of transferring horizontal movement without bearing, each end of the upper connecting rod 31 is connected to the pillar structure 11 through a first hinge shaft 33, and each end of the lower connecting rod 32 is connected to the pillar structure 11 through a second hinge shaft 34. In other embodiments it may also be: the two ends of each of the upper connecting rod and the lower connecting rod are respectively connected with the upright post structures through a plurality of hinge shafts, and at the moment, tiny relative displacement is generated between the two upright post structures.

In one embodiment of the present invention, a plurality of first connection holes are respectively formed at both ends of the cargo table 21, a plurality of second connection holes are respectively formed at the two lifting brackets 22, and the lifting brackets 22 connected to each end of the cargo table 21 are flexibly connected by a plurality of hinge shafts penetrating the plurality of first connection holes and the plurality of second connection holes. Specifically, since the cargo bed needs to carry the weight of the cargo, each end of the cargo bed 21 is connected to the lifting frame 22 through a plurality of third hinge shafts 23, in this embodiment, two three third hinge shafts 23 are used to connect the lifting frame 22, and the axes of the three third hinge shafts 23 are located in the same plane. The cargo bed 21 and the lifting frame 22 may be slightly swung therebetween to achieve their flexible connection. In other embodiments it may also be: each end of the carrying platform is connected with the lifting bracket through a third hinge shaft, and at this time, if the cargo on the carrying platform is heavy, the radial dimension of the third hinge shaft needs to be larger, or the cargo on the carrying platform is light, the radial dimension of the third hinge shaft does not need to be too large.

In one embodiment of the present invention, the pillar structure 11 has an inverted T-shape, and includes a pillar body 111, an upper beam 112 connected to the top of the pillar body 111, and a lower beam 113 connected to the bottom of the pillar body 111, wherein the upper connecting rods 31 are respectively connected between the two upper beams 112, and the lower connecting rods 32 are respectively connected between the two lower beams 113. The lower beam 113 needs to bear the weight of the whole machine, and a box welding structure can provide good moment of inertia, so that the deformation is reduced. The upright post body 111 can be of a rectangular structure or a welded box body structure, flat steel is welded on the upright post body 111 according to the whole height/bearing, the upper end of the upright post body 111 is welded with the upper cross beam 112 for guiding and supporting, the upper cross beam 112 is of a rectangular structure or a welded box body, the upper cross beam can be adjusted according to actual lifting load, the rectangular structure is preferred, the structure is simple, the whole structure length of the existing upper cross beam 112 is short, the manufacturing cost and the dead weight of equipment can be greatly reduced, and the safety cat ladder 7 and the top maintenance platform 8 are arranged on the upright post bodies 111 at two sides, so that the later-stage top maintenance is facilitated; the operation table 9 is installed at the bottom of the upright post body 111, and the operation table 9 is arranged on the lower cross beam 113 and is a main control unit of the stacker and a converging place of wires. In other embodiments it may also be: the whole upright post structure is of an L-shaped structure or an upright straight-line structure.

In the preferred embodiment of the present embodiment, the lifting bracket 22 is provided with lifting guide wheels 24 for guiding the lifting bracket to lift and cooperate with the lifting guide rail 12 on the upright structure 11, and the cargo bed 21 is provided with a plurality of fork assemblies 25 positioned at different positions along the traveling direction thereof. Specifically, the lifting guide rail 12 is made of flat steel, one of the wider surfaces of the flat steel is connected to the upright body, each lifting support 22 is provided with four groups of lifting guide wheels 24, and each group of lifting guide wheels comprises two lifting guide wheels respectively in rolling contact with the wider surface and the narrower surface of the flat steel. In the view of fig. 1, two narrower surfaces of the flat steel are respectively advanced and backward, wherein two sets of lifting guide wheels are arranged at the upper end of the lifting support and are arranged front and back, the other two sets of lifting guide wheels are arranged at the lower end of the lifting support and are arranged front and back, the front and back two sets of lifting guide wheels are arranged in a front-back axisymmetric manner, and the upper and lower two sets of lifting guide wheels are overlapped after being vertically overturned. Each group of lifting guide wheels are arranged in a modularized mode, the lifting guide wheels are directly fixed through bolts, long-term stock can be carried out, later-stage disassembly and maintenance are simple, safety tongs 26 are further arranged on each lifting support, the safety tongs 26 are fixed between the lifting guide wheels 24 and are also modularized components, the lifting guide wheels 24 are fixed through bolts and the lifting support 22, the modularized design is suitable for local change of a design change, the design and production period can be greatly saved, the safety tongs 26 are mainly matched with a speed limiter 27 to use an overspeed rope breaking protection effect, a purely mechanical structure is adopted, a fork component 25 is arranged on a cargo carrying platform 21, the fork component 25 can be driven independently for a plurality of groups of forks, namely, each fork component is driven independently, or a plurality of fork components are driven in a sharing mode, judgment selection can be carried out according to the type of stored goods, and the speed limiter is arranged on a lower cross beam 113 to be matched with the safety tongs 26. In other embodiments it may also be: the lifting guide wheel is replaced by a sliding block.

In the preferred embodiment of the present embodiment, the top of each upright structure 11 is provided with a first running guide wheel 13 for guiding the upright structure to run and being matched with the top rail 41, and the bottom of each upright structure 11 is provided with a second running guide wheel 14 for guiding the upright structure to run and being matched with the bottom rail 42. Specifically, two first traveling guide wheels 13 are arranged at two ends of each upper beam 112, two second traveling guide wheels 14 are arranged at two ends of each lower beam 113, the first traveling guide wheels 13 play a role in auxiliary guiding and supporting, and the second traveling guide wheels 14 play a role in horizontal guiding. In other embodiments it may also be: the first walking guide wheel and the second walking guide wheel are replaced by sliding blocks.

In the preferred embodiment of the present embodiment, each lifting bracket 22 is provided with a movable pulley 28, the upper end of each upright post structure 11 is provided with a fixed pulley 15 and is fixed with one end of a wire rope 31, and the other end of each wire rope 51 is sequentially connected to the lifting mechanism after descending, bypassing the movable pulley 28, ascending, bypassing the fixed pulley 15, and descending. Specifically, the wire rope goes up and then goes around at least two fixed pulleys and then goes down.

In one embodiment of the present invention, the ultra-long stacker device includes one of the hoisting mechanisms mounted on one of the upright structures 11, the hoisting mechanism is a dual-drum hoist, the dual-drum hoist includes two drums 52 for winding two wire ropes 51 respectively, and a first driving motor 53 for driving the two drums 52 to rotate, wherein the other end of one wire rope 51 sequentially descends, bypasses the movable pulley 28, ascends, bypasses the fixed pulley 15 on one of the upright structures 11, descends and then connects with one of the drums 52, and the other end of the other wire rope 51 sequentially descends, bypasses the movable pulley 28, ascends and bypasses the fixed pulleys 15 on the two upright structures 11, descends and then connects with the other drum 52. Specifically, the other end of one wire rope bypasses two fixed pulleys on one upright post structure 11 and then descends, and the other end of the other wire rope bypasses one fixed pulley on one upright post structure 11 and then horizontally travels and then bypasses one fixed pulley on the other upright post structure 11 and then descends. The fixed pulley 15 mainly plays a lifting transition role, the movable pulley 28 plays a transition steel wire rope 51 and provides a traction fulcrum, the whole is in a movable pulley structure, and half of force can be saved in lifting. The hoist is fixed to the column body 111 and mounted above the operation table. The wire rope 51 is fixedly wound on the winding drum 52, passes through the fixed pulley 15, transits to the movable pulley 28, finally returns to the upper beam 112 to be fixed, the first driving motor 53 drives the winding drum 52 to rotate, the winding and unwinding of the wire rope 51 are controlled, the lifting and descending of the cargo carrying mechanism are realized, the winding drum shield 54 arranged on the first driving motor 53 can play a role in preventing the wire rope from jumping, and the safety protection of personnel can be further realized. In other embodiments it may also be: the lifting mechanism adopts a motor screw nut lifting mechanism.

In the preferred embodiment of the present embodiment, the bottom of each upright structure 11 is provided with one of the travelling mechanisms, which comprises two load wheels 61 and a second drive motor 62 for providing rotational power to the load wheels 61. Specifically, two load wheels 61 are disposed on each lower beam 113, so that the load wheels can bear the force exerted by the upper part of the load wheels, the stability of the equipment is ensured, and meanwhile, a second driving motor 62 is disposed on the side surface of the lower beam 113, and the front-back driving synchronization is ensured under the condition that enough power is provided for the equipment. In other embodiments it may also be: the travelling mechanism comprises three or one or four load wheels, and one travelling mechanism comprises a second driving motor.

The invention has the same use mode as the common stacker, the goods are picked by the fork assembly and stored on the carrying platform, the travelling mechanism drives the goods to be transferred from one place to another place, the lifting mechanism drives the goods to be lifted from one height to the other, and the fork assembly sends the goods to the stacking position.

The invention can be used for occasions with the length of 16m of cargoes, adopts a hinged structure form at a plurality of positions, ensures the rotation capacity of a joint when the shearing force is transmitted, can greatly reduce the torsional deformation of equipment caused by an ultra-long span, can automatically float and adjust errors in the operation process, has a great reduction effect on the complexity of the manufacturing process of the whole equipment, has a stable structure, can adjust the length of a connecting rod between two upper cross beams and a lower cross beam according to the actual span (length) requirement, and ensures that the lower cross beam and the upper cross beam are in breaking hinge connection, thereby ensuring the rigidity required by the equipment and having the weight which is about 50 percent lighter than that of the whole normal structure. The modularized design can reduce the design workload, and is beneficial to long-term stock, production and maintenance period reduction.

Example two

Referring to fig. 9, the remaining embodiments are the same as the first embodiment, except that the ultra-long stacker device includes two lifting mechanisms respectively mounted on the two upright structures, the lifting mechanisms are single-drum winders, the single-drum winders include a drum for winding one wire rope and a first driving motor for driving the drum to rotate, and the other end of each wire rope sequentially descends, bypasses the movable pulley, ascends, bypasses the fixed pulley on the upright structure, descends and then is connected with the drum. When the span (i.e. length)/bearing of the stacker is large, the lifting double-drive is selected, namely, two lifting mechanisms are adopted.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an overlength stacker device, includes frame, liftable connect in the frame and be used for bearing cargo carry cargo mechanism, install in the frame and drive carry cargo mechanism goes up and down's hoisting mechanism and install in the frame and drive the running gear of frame walking, its characterized in that:

2. The ultra-long stacker apparatus according to claim 1, wherein both ends of each of said upper and lower connecting rods are hinged to said two upright structures, respectively.

3. The ultra-long stacker apparatus according to claim 1, wherein a plurality of first connection holes are respectively provided at both ends of said loading table, a plurality of second connection holes are respectively provided at said two lifting brackets, and said lifting brackets to which each end of said loading table is connected are flexibly connected by a plurality of hinge shafts penetrating said plurality of first connection holes and said plurality of second connection holes.

4. The ultra-long stacker device according to claim 1, wherein the column structure is in an inverted T-shape as a whole, and comprises a column body, an upper beam connected to the top of the column body, and a lower beam connected to the bottom of the column body, wherein the upper connecting rods are respectively connected between the two upper beams, and the lower connecting rods are respectively connected between the two lower beams.

5. The ultra-long stacker apparatus according to claim 1 wherein said elevation bracket is provided with elevation guide wheels guiding the elevation thereof and cooperating with elevation guide rails on said upright structure.

6. The ultra-long stacker apparatus according to claim 1, wherein a first travel guide wheel guiding the travel of the upright structures and being matched with the top rail is provided at the top of each upright structure, and a second travel guide wheel guiding the travel of the upright structures and being matched with the ground rail is provided at the bottom of each upright structure.

7. The ultra-long stacker apparatus according to claim 1, wherein a movable pulley is mounted on each lifting bracket, a fixed pulley is mounted on an upper end of each upright post structure, one end of a wire rope is fixed, and the other end of each wire rope sequentially descends, bypasses the movable pulley, ascends, bypasses the fixed pulley, descends and then is connected to the lifting mechanism.

8. The overlength stacker apparatus of claim 7 wherein said overlength stacker apparatus includes one of said hoisting mechanisms mounted on one of said column structures, said hoisting mechanism is a dual-reel hoist including two reels for respectively winding two of said wire ropes and a first drive motor for driving said two reels to rotate, wherein the other end of one of said wire ropes goes down, bypasses said movable pulley, goes up, bypasses said fixed pulley on one of said column structures, goes down and then connects one of said reels, and the other end of the other of said wire ropes goes down, bypasses said movable pulley, goes up, bypasses said fixed pulley on both of said column structures, goes down and then connects the other of said reels.

9. The overlength stacker apparatus of claim 7 including two of said hoisting mechanisms mounted on said two upright structures respectively, said hoisting mechanism being a single reel winch including a reel for winding one of said wire ropes and a first drive motor for driving said one reel to rotate, the other end of each of said wire ropes being sequentially lowered, bypassed around said movable sheave, raised, bypassed around said fixed sheave on one of said upright structures, lowered and connected to said reel.

10. The ultra-long stacker apparatus according to claim 1, wherein a bottom of each of said pillar structures is provided with one of said travelling mechanisms including two load wheels and a second drive motor for supplying rotational power to said load wheels.