JP2011089358A - Heavy load conveying mechanism and heavy load conveying method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying mechanism including a shock absorbing mechanism provided in a partial section of a conveying path to relieve an impact load loaded to a frame for supporting a travel rail when a conveyed object is placed on a traveling truck. <P>SOLUTION: The conveying mechanism for loading the traveling truck 6 traveling on a track 5, with a heavy load includes a liftable upper frame 8 supporting the track, and a lower frame 9 supporting the upper frame 8, in the partial section on the track 5. A lifting mechanism 10 for lifting the upper frame 8, cushioning mechanisms 11 absorbing a shock when placing the heavy load, and height adjusting mechanisms 12 for the upper frame 8, are provided between the upper frame 8 and the lower frame 9. The upper frame 8 is supported by the cushioning mechanisms 11 when placing the heavy load on the traveling truck 6, and supported by the height adjusting mechanisms 12 after the heavy load is placed on the traveling truck 6. The cushioning mechanism 11 is formed of a spring, and the height adjusting mechanism 12 is formed of a detachable liner. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a heavy material transport mechanism that loads and transports heavy objects on a carriage traveling on a track, and a heavy material transport method using the same, and more particularly to a hot-rolled steel sheet or a cold-rolled steel coil wound in a coil shape. The present invention relates to a steel sheet suitable for conveyance in a factory.

  Hot-cold rolled steel sheets and surface-treated steel sheets are made into products through many processes such as a hot-rolling process, a cold-rolling process, and a surface treatment process. Therefore, it is usually transported between a plurality of factory buildings many times in the form of being wound in a coil shape until it is completed as a product.

  In order to reduce the time and labor required for conveyance between the respective processes, various rational factory layouts and agile conveyance apparatuses have been proposed (for example, Patent Document 1, Conveyance apparatus for the factory layout). (Patent Document 2 etc.).

  FIG. 5 shows an example of a transport line 1 provided when a thin steel plate is coiled and transported between a plurality of buildings in a factory through a building, and each transport line row 1a, 1b, 1c, 1d, 1e is shown. Is provided with transport means such as a moving skid or a transport carriage. In addition, transfer positions 2a, 2b, 2c, and 2d between the transfer line rows are each provided with a transfer device that transfers coils from the upstream transfer line row to the downstream transfer line row. Then, the coil 3 is conveyed from the upstream side to the downstream side of the conveyance line 1 (from the conveyance line row 1a in the A building to the conveyance line row 1e in the C building) as indicated by an arrow in FIG.

  In the conveyance line 1 illustrated in FIG. 5, since the conveyance line rows 1a to 1e are arranged in series and no spare line is provided, for example, when the conveyance line row 1b or 1c fails, the conveyance line A The coil 3 on the line line 1a cannot be transferred to the transfer position 2c to the transfer line line 1d in the B building, and the coil 3 on the transfer line line 1a cannot be transferred to the transfer line line 1e. It becomes possible.

  In order to cope with such an abnormal situation, in the transfer line 1 illustrated in FIG. 5, the transfer path of the transfer line row 1 d is extended to the A building, and is lifted by an overhead crane (not shown) on the route in the A building. The position of the coil 3 on the carriage (not shown) of the conveyance line row 1d (transfer position 4 by the overhead crane) is provided, and the coil on the conveyance line row 1a is used as an emergency by the overhead crane of the A building. 3 can be directly conveyed to the conveyance line row 1d.

JP-A 62-54501 JP 2007-106147 A

  By the way, thin steel plates are used for products such as automobiles and home appliances whose appearance defects impair the product value. Therefore, there are high demands on the surface properties of steel plates, and they are managed so that surface defects do not occur in the manufacturing and transport processes. . Therefore, in the conveyance line as illustrated in FIG. 5, each conveyance line row is provided in the same horizontal plane as much as possible, or a device is devised so that an impact is not applied to the coil when the coil is transferred at the transfer position.

  On the other hand, in the above-mentioned emergency, when a coil lifted by an overhead crane is placed directly on a carriage, surface flaws may occur on the steel sheet due to an impact when the coil lands on the carriage. In addition, a failure may occur in a traveling system such as a wheel of a truck or an axle due to an impact load.

  As a countermeasure, it may be possible to provide an impact shock absorber on the cart, but if the number of carts is large, a huge cost is required, which is not realistic.

  Then, an object of this invention is to provide the coil conveyance mechanism provided with the mechanism which eases the impact load at the time of coil mounting.

The object of the present invention can be achieved by the following means.
1. A transport mechanism for loading and transporting heavy objects on a carriage traveling on a track, wherein the upper frame can be moved up and down to support the track in a part of the track, and a lower frame to support the upper frame And an elevating mechanism for raising and lowering the upper gantry, a buffer mechanism for absorbing an impact when placing a heavy object, and a height adjusting mechanism for the upper gantry between the upper gantry and the lower gantry A heavy-duty conveyance mechanism characterized by that.
2. The weight according to claim 1, wherein the upper frame is supported by the buffer mechanism when a heavy object is placed on the carriage, and is supported by the height adjusting mechanism after the heavy object is loaded on the carriage. Material transport mechanism.
3. 3. The heavy article conveyance mechanism according to claim 1 or 2, wherein the buffer mechanism is constituted by a spring, and the height adjusting mechanism is constituted by a removable liner.
4). A heavy material transport line for transporting a heavy object by a plurality of transport means, wherein a part of the transport means using a carriage traveling on a track among the plurality of transport means, A heavy article conveyance line comprising the conveyance mechanism according to any one of the above.
5). A heavy material transport method for transporting a heavy object using a transport line provided with a plurality of transport means, wherein, among the plurality of transport means, a partial section of the transport means using a carriage traveling on a track. In addition, in the case where the transport mechanism according to any one of 1 to 3 is provided, and the transport means upstream of the transport means including the transport mechanism fails, a carriage is disposed on the upper frame of the transport mechanism. The weight is placed on the carriage with a heavy article lifted by an overhead crane from the failed conveyance means, and the heavy article is conveyed to a conveyance means downstream of the conveyance means having the conveyance mechanism. How to transport things.

  According to the present invention, even when a heavy object is placed on a carriage by an overhead crane, the impact at the time of landing can be mitigated, surface flaws occur on the steel sheet, or the carriage is damaged by an impact load. Can be prevented. Therefore, even if the transport means fails on the upstream side of the transport path for transporting heavy objects, it becomes possible to directly transport heavy objects to the transport means downstream of the failed transport means using the overhead crane. . In addition, since the buffer mechanism is provided not on the trolley side but on the track base side, it is sufficient to provide the buffer mechanism only at one transfer position even in the transport means on which many trolleys travel, which is extremely useful in the industry. is there.

FIG. 3 is a schematic perspective view to which the transport mechanism according to the present invention is applied. The schematic diagram which shows an example of the conveyance mechanism which concerns on this invention. The figure which shows the AA view of FIG. 2 which shows an example of the conveyance mechanism which concerns on this invention. It is a schematic diagram explaining the function of the conveyance mechanism which concerns on this invention, (a) is a normal operation | work, (b) is coil mounting waiting, (c) The figure which shows the state at the time of coil mounting. The figure which shows an example of the coil conveyance line in a factory.

  The present invention comprises a transport means having a carriage traveling on a track in a part of a transport path for heavy objects, a specific section having a buffer mechanism is provided in a part of the track of the transport means, The technical idea is to arrange a traveling carriage in the specific section and place a heavy object lifted by an overhead crane on the traveling carriage when the transportation means fails in the upstream transportation path. Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a specific section (transfer by a crane) in which a coil 3 is transferred by an overhead crane provided in a part of the transfer line row 1d of the in-factory transfer line 1 of the heavy load (coil 3) shown in FIG. In position 4), it is the typical perspective outline figure to which the conveyance mechanism 7 concerning the present invention is applied.

  As shown in FIG. 1, a partial section of the track 5 on which the carriage 6 travels is divided and a transport mechanism 7 is provided. The transport mechanism 7 includes an upper frame 8 that can move up and down to support the track 5 a and a lower frame 9 that supports the upper frame 8. A mechanism 11 and a height adjusting mechanism 12 are provided.

  The raising / lowering mechanism 10 has a function which raises / lowers the upper mount frame 8, for example, consists of a cylinder. The buffer mechanism 11 has a function of absorbing an impact generated when the coil 3 is placed on the carriage 6 on the upper mount 8 from the overhead crane, and is made of, for example, a coil spring. The height adjustment mechanism 12 has a function of adjusting the height of the upper gantry 8 so that the height level of the track 5 a supported by the upper gantry 8 matches the height level of the track 5 in the front and rear sections of the transport mechanism 7. For example, a detachable liner.

  Since the transport mechanism 7 is in a part of the path along which the carriage 6 travels, the upper frame 8 is supported by the height adjustment mechanism 12 so that the height of the track 5a matches the track 5 in the front and rear sections.

  On the other hand, when it becomes necessary to transfer the coil 3 lifted by the overhead crane to the carriage 6 due to a failure of the conveying means on the upstream side, the carriage 6 is first positioned on the upper frame 8 of the conveyance mechanism 7. . Then, after raising the upper frame 8 using the lifting mechanism 10 and releasing the height adjustment mechanism 12, the upper frame 8 is lowered again using the lifting mechanism 10, and the upper frame 8 is supported by the buffer mechanism 11. When the coil 3 is placed on the carriage 6 from the overhead crane in this state, the shock upon landing of the coil 3 can be absorbed by the action of the buffer mechanism 11.

  Next, the upper frame 8 is raised using the lifting mechanism 10, and the upper frame 8 is supported by the height adjusting mechanism 12 so that the height position of the track 5 a matches the track 5 in the front and rear sections, and then the coil 3 is loaded. The trolley | bogie 6 made to travel downstream.

  As described above, according to the transport mechanism 7 of the present invention, it is possible to absorb an impact when a heavy object (coil) lifted by an overhead crane is transferred onto a carriage, so that surface flaws are generated on the steel plate. The cart can be prevented from being damaged by an impact load. In addition, when a shock absorbing mechanism is provided on the carriage side, a buffering mechanism corresponding to the number of trucks is required.However, since the shock absorbing mechanism is provided on the track base side, the shock absorbing mechanism is provided only at the transfer position by the crane. This is very advantageous in terms of cost.

  Next, details of the transport mechanism 7 according to the present invention will be described. FIG. 2 is a diagram illustrating an example of a specific configuration of the transport mechanism 7 according to the present invention, and FIG. 3 is a view taken along line AA of FIG.

  A coil spring guide 13 is attached to the lower surface side of the upper gantry 8, and the coil spring 14 is accommodated in the coil spring guide 13 so as to be extendable in the vertical direction, and the piston 15 is movable in the vertical direction below the coil spring guide 13. It is stored. The coil spring guide 13, coil spring 14, and piston 15 constitute a buffer mechanism 11.

  On the other hand, an elevating cylinder 16 is fixed to a member below the lower gantry 9, and a rod 17 of the elevating cylinder 16 extends through the lower gantry 9 to below the piston 15 of the buffer mechanism 11. The elevating cylinder 16 and the rod 17 constitute the elevating mechanism 10.

  Further, a liner cylinder 19 for entering and exiting a liner 18 sandwiched between the lower frame 9 and the coil spring guide 13 is fixed on the upper surface of the lower frame 9, and the liner 18 is attached to the lower frame 9 at the tip thereof. It is attached between the coil spring guide 13 so as to be able to enter and exit. The liner 18 and the liner cylinder 19 constitute a height adjusting mechanism 12.

  FIG. 4 is a schematic diagram for explaining the function of the transport mechanism 7. The function of the transport mechanism 7 will be described with reference to FIG.

  FIG. 4A shows a normal working state. A liner 18 having a thickness d1 is sandwiched between the lower frame 9 and the coil spring guide 13, and the upper frame 8 is supported by the liner 18. Here, the thickness d1 of the liner 18 is such that when the liner 18 is sandwiched between the lower frame 9 and the coil spring guide 13, the height of the track 5a (not shown) supported by the upper frame 8 and the transport mechanism 7 is set. It is selected so that the heights of the tracks 5 in the preceding and following sections coincide. In this state, the elevating cylinder 16 is positioned at the lower limit, and the rod 17 and the piston 15 are separated from each other with a gap g.

  Next, the case where the coil lifted by the overhead crane is transferred to the carriage 6 will be described. First, the carriage 6 is positioned on the upper frame 8 of the transport mechanism 7. Then, the rod 17 is pushed upward by the elevating cylinder 16 and the upper frame 8 is lifted upward via the piston 15 and the coil spring 14, and then the liner cylinder 19 is set to the limit (cylinder pulling side), and the liner 18 is moved to the lower frame. Pull out from between 9 and the coil spring guide 13.

  Subsequently, when the elevating cylinder 16 is lowered to the lowering limit, the coil 3 (not shown in the drawing) shown in FIG. That is, the upper frame 8 is supported by the rod 17 via the coil spring 14 and the piston 15. At this time, the gap d2 between the lower gantry 9 and the coil spring guide 13 is equal to the gap g between the rod 17 and the piston 15 that was held in the normal operation state of FIG. The thickness is smaller than the thickness d1 of the liner 18 by the amount of contraction of the coil spring 14 due to the weight of the cart 6 (not shown) located above.

  FIG. 4C shows a state where the coil 3 (not shown in the figure) is placed on the carriage 6 on the upper frame 8. The coil spring 14 contracts as much as the weight of the coil 3 is added, and the gap d3 between the lower frame 9 and the coil spring guide 13 is further narrowed. Here, the spring constant of the coil spring 14 is such that when the coil 3 (omitted in the figure) is lowered from the crane onto the cart 6 (omitted in the figure), the coil spring contracts and the lower gantry 9 and the coil spring guide 13 are moved. It is necessary to select so that it does not touch. By using a coil spring having an appropriate spring constant, it is possible to absorb an impact when the coil 3 (not shown in the figure) is placed on the carriage 6 from the overhead crane without damaging the transport mechanism 7.

  When the mounting of the coil 3 (not shown) on the carriage 6 (not shown) is completed, the rod 17 is pushed upward by the elevating cylinder 16 and the upper frame 8 is lifted upward via the piston 15 and the coil spring 14. After providing a gap for inserting the liner 18 between the lower gantry 9 and the coil spring guide 13, the liner 18 is inserted between the lower gantry 9 and the coil spring guide 13 with the liner cylinder 19 as the limit. When the transport mechanism 7 is returned to the normal working state of FIG. 4A in this way, the cart 6 on which the coil 3 is placed is transported downstream.

  According to the transport mechanism 7 of the present invention as described above, a heavy object (coil) lifted by an overhead crane can be obtained with a simple structure and only by being installed on a platform at one transfer position by a crane on the transport line. The impact at the time of transfer on the carriage can be stably absorbed.

  Note that the transport mechanism 7 of the present invention described above may be provided in a partial section of the transport means using a carriage traveling on a track, and the position is not particularly defined.

  Further, the transport mechanism 7 of the present invention is preferably applied to a transport line that transports a plurality of buildings in a factory as shown in FIG. 5 through a building, but is not limited to this. The present invention can be widely applied to a case where heavy objects are transferred to a transfer line using a cart traveling on the top by an overhead crane or the like.

DESCRIPTION OF SYMBOLS 1 Transfer line 1a, 1b, 1c, 1d, 1e Each transfer line row | line | column 2a, 2b, 2c, 2d Transfer position 3 Coil 4 Transfer position by crane 5 Track 6 Traveling carriage 7 Transfer mechanism 8 Upper mount 9 Lower mount 10 Lifting Mechanism 11 Buffer mechanism 12 Height adjustment mechanism 13 Coil spring guide 14 Coil spring 15 Piston 16 Lift cylinder 17 Rod 18 Liner 19 Liner cylinder

Claims (5)

  A transport mechanism for loading and transporting heavy objects on a carriage traveling on a track, wherein the upper and lower supports supporting the track are supported in a partial section on the track, and a lower support supporting the upper frame. And an elevating mechanism for raising and lowering the upper gantry, a buffer mechanism for absorbing an impact when placing a heavy object, and a height adjusting mechanism for the upper gantry between the upper gantry and the lower gantry A heavy-duty conveyance mechanism characterized by that.   2. The upper frame is supported by the buffer mechanism when placing a heavy object on the carriage, and is supported by the height adjusting mechanism after loading the heavy article on the carriage. Heavy goods transport mechanism.   The heavy-duty conveyance mechanism according to claim 1, wherein the buffer mechanism is configured by a spring, and the height adjusting mechanism is configured by a removable liner.   It is a heavy goods conveyance line which conveys a heavy article by a some conveyance means, Comprising: It is a partial area | region of the conveyance means using the trolley | bogie which travels on a track among these conveyance means. A heavy article conveyance line comprising the conveyance mechanism according to any one of the above.   A heavy material transport method for transporting a heavy object using a transport line provided with a plurality of transport means, wherein, among the plurality of transport means, a partial section of the transport means using a carriage traveling on a track. In addition, the transport mechanism according to any one of claims 1 to 3 is provided, and when the transport means upstream of the transport means including the transport mechanism fails, a carriage is disposed on the upper frame of the transport mechanism. In addition, a heavy object lifted by an overhead crane is placed on the carriage, and the heavy object is conveyed to a conveying means downstream of the conveying means provided with the conveying mechanism. Transporting heavy items.

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