JP2009298526A - Heavy object transporting system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transporting system and a method for a heavy object such as a wave-absorbing concrete block which is more economic than those for installing two conventional large cranes and improves transporting efficiency. <P>SOLUTION: This transporting system has a transporting vehicle 16 provided with an elevating deck, a transporting rack 12 which is mounted on the deck in the extended state of each end to both sides of the transporting vehicle and can load the heavy object thereon, and at least a pair of fixed receiving racks to receive both ends of the transporting rack by each top and support the transporting rack in a bridging state when the receiving racks are disposed to be separated by a space into which the transporting vehicle can advance at a loading spot and the transporting vehicle advancing up to a prescribed position by bringing the deck into a rising state between the receiving racks lowers the deck. The transporting system is suitably applied when transporting the wave-absorbing concrete block 10 as the heavy object, in particular. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for transporting heavy objects such as a wave-dissipating block economically and efficiently.

  For example, in the case of construction work such as a nuclear power plant or thermal power plant in a coastal area, wave-dissipating blocks are regularly arranged from the quay to the offshore for the purpose of revetment with a specified top width and surface slope. Wave extinguishing work is performed. It is known that wave-dissipating works generally have a long construction period and a large number of wave-dissipating blocks, depending on the size of the quay.

As the wave-dissipating block, for example, called tetrapod (registered trademark), an unreinforced concrete block including four truncated conical legs extending radially is often used. The wave-dissipating block is usually a heavy object and has a high transportation cost. Therefore, the wave-dissipating block is manufactured at a wave-dissipating block manufacturing plant temporarily installed in the vicinity of the quay where the wave-dissipating work is to be performed. Temporarily placed. After that, in order to place them on the quay, the trailer is moved back and forth from the temporary storage to the wave-dissipating block unloading location near the quay. Loading into the trailer and unloading of the wave-dissipating block from the trailer. Since these large cranes are not required after the completion of construction, they are usually procured and installed by lease.
JP 2004-142837 A JP 2003-522697 A

  However, the installation of large cranes at the temporary storage site and the unloading site during the long-term wave-extinguishing work only increases the lease fee when these cranes are procured through leases. Not only that, it is necessary to place slinging workers in both places, which is very uneconomical. Moreover, since loading and unloading of the wave-dissipating block with a large crane takes a certain amount of time and labor, there is a problem that the efficiency of conveying the wave-dissipating block between these two points is poor.

  Accordingly, the present invention provides a system and method for transporting heavy objects such as a wave-dissipating block that solves such problems and is more economical than conventional methods using two cranes and improves transport efficiency. With the goal.

  According to one aspect of the present invention, the object is to be placed on the carrier with a transport vehicle having a load platform that can be moved up and down, and with end portions protruding from both sides of the transport vehicle. And a transport platform that can load a heavy load on the cargo handling area, and an interval that allows the transport vehicle to enter the loading area. It is achieved by a heavy material transportation system comprising at least one pair of fixed cradles that receive both ends of the transportation cradles at the tops when they are lowered and support the transportation cradles in a bridged state. .

  Further, according to another aspect of the present invention, the object is to mount the transportation platform by projecting from both sides in the width direction on the transportation platform of the transportation vehicle including the transportation platform capable of moving up and down in the first loading place. A pair of fixings placed on the top of which a heavy object is loaded and then transported to the second loading place by the transport vehicle, separated by a distance slightly larger than the width of the loading platform of the transport vehicle. The carrier vehicle that has moved up to a predetermined position with the cargo bed raised between the cradle, lowered the cargo bed, received both ends of the carrier cradle at the top of the fixed cradle, and bridged the carrier cradle It is achieved by a method for transporting heavy objects, characterized in that it is supported and stored in a container.

  According to the heavy material transport system and the transport method of the present invention, since handling with a crane can be omitted in at least one of the cargo handling places, the cost and the arrangement of slinging workers can be reduced more than when two conventional cranes are installed. In this respect, it becomes economical and the transportation efficiency is improved.

  Next, taking as an example the conveyance of a wave-dissipating block frequently used for wave-dissipation work on a coastal quay or the like, the heavy-material conveying system of the present invention will be described in detail with reference to the accompanying drawings. In the following, it is assumed that Tetrapod (registered trademark) having four truncated conical legs extending radially as a wave-dissipating block is used. In the production of the wave-dissipating block 10, a wave-dissipating block production plant is usually temporarily installed in the vicinity of the quay where the wave-dissipating work is to be performed. In this manufacturing plant, first, the required mass of the wave-dissipating block is determined by Hudson's formula using data such as the density of concrete, the design slope of the surface slope after wave-dissipation, and the design wave height, and the volume corresponding to this is determined. The wave-dissipating block 10 is manufactured by pouring concrete into a steel mold provided and hardening it, and then releasing the mold and curing it under predetermined conditions. The various wave-dissipating blocks having a normal mass in the range of 0.5 to 80 t thus obtained are temporarily placed in a temporary storage place that is a loading place. In addition, a trailer having a bed that can be moved up and down is used for the transport vehicle of the wave-dissipating block, and a crane is used for loading the wave-dissipating block on the transport vehicle at the loading site.

  FIG. 1 is a diagram illustrating an example of a heavy material transport system and a transport method according to the present invention. In this figure, reference numeral 10 is a wave-dissipating block, 12 is a transportation platform, 20 is a crane, 30 is a trailer, 31 is a loading platform, and 40 and 46 are fixed platforms. 2 includes an enlarged view of FIG. 1 (b), and is a diagram showing a state in which the wave-dissipating block is loaded on the trailer loading platform, and FIG. 3 shows (c-1) and (c-2) in FIG. ) Is an enlarged view. Further, FIG. 4 is a view of the fixed cradle on which the wave-dissipating block is placed as viewed from the direction perpendicular to the trailer entry direction.

  As shown in FIG. 2 or FIG. 3, the transport frame 12 fixes two long supporting aggregates R1 and R2 arranged in parallel to each other, and both the aggregates R1 and R2 in a substantially parallel manner. For this purpose, a skeleton structure having a substantially rectangular shape in plan view, which is a combination of longitudinal members 13 and 13 having a predetermined length for connecting both ends thereof, is provided. If the transportation platform 12 has a shape that allows the bottom surface to be placed on the loading platform of the trailer 30 and has a structure and strength characteristics that allow the wave-dissipating block 10 to be loaded thereon, does the transportation platform 12 include the skeleton structure described above? No particular limitation is imposed on the overall shape and structure.

  Among the skeletal structures, the supporting aggregates R1 and R2 are three truncated cones that extend radially of the wave-dissipating block 12 when the wave-dissipating block 12 is loaded on the carrier base 12, respectively. It is the main member that directly receives the tip of the leg. Therefore, each of the supporting aggregates R1 and R2 supports the wave-dissipating block 12 in these intermediate regions and receives the load in the region, and even when both ends in the longitudinal direction are supported and in a crosslinked state. It is required to have rigidity (strength characteristics) that hardly causes deformation such as deflection. In FIG. 2 and FIG. 3, these are structures in which three H-shaped steels of the same length are arranged with their respective webs aligned horizontally in the vertical direction, and these are connected to each other using a known connector or the like. It is said that. The size and number of the H-shaped steels to be connected can be appropriately set using a predetermined safety factor in consideration of the mass of the wave-dissipating block 10 loaded on the transportation platform.

  Further, the length of the supporting aggregates R1 and R2 is set to be larger than the width of the loading platform 31 of the trailer 30 on which the transport platform 12 is to be placed. Specifically, the total length of each of the supporting aggregates R1 and R2 is preferably set to be about 1 to 2 m longer than the width of the loading platform 31 of the trailer 30. By setting such a length, as will be described later, both ends of each of the supporting aggregates R1 and R2 are securely supported at the top of the adjacent fixed cradle, and each of the supporting aggregates is supported. R1 and R2 can bridge between the tops of the fixed cradle.

  Further, as shown in FIGS. 2 and 3, the transport frame 12 is a scaffold plate material provided so as to close a substantially rectangular opening surrounded by a skeleton structure composed of supporting aggregates R <b> 1 and R <b> 2 and vertical members 13 and 13. 121, and scaffolding plates 122 and 123 provided on brackets 125 and 126, respectively, in the direction perpendicular to the outer surfaces of the supporting aggregates R1 and R2 over the entire length. Each of the brackets 125 and 126 is composed of a horizontal material that supports the back surfaces of the scaffold plates 122 and 123 in parallel to the width direction thereof, and an oblique material that is fixed at one end to hold the horizontal material substantially horizontally. Has been. The brackets 125 and 126 can be provided at both ends in the arrangement direction of the supporting aggregates R1 and R2 of the scaffold plates 122 and 123, respectively, and in an intermediate region as necessary. By appropriately setting the size of the horizontal members of the brackets 125 and 126 together with the total length of the supporting aggregates R1 and R2, the wave-dissipating block is applied not only to the both ends in the length direction of the scaffold plate 121 but also to the scaffold plates 122 and 123. It is possible to fulfill the function of a worker's walkway around the area 10. In addition, it replaces with this bracket and other well-known support metal fittings can also be used.

  Handrails that can be erected vertically are provided at the outer ends of the scaffold plates 122 and 123 in the longitudinal direction. The handrail is pivotally supported at its base, and the entire handrail is rotated from the vertically standing state to the horizontal state in the direction perpendicular to the arrangement direction of the supporting aggregates R1 and R2. It can be moved.

  The trailer 30 is suitable for transporting the wave-dissipating block 10, has a width and length that are large enough to load the block 10, and includes a loading platform 31 that can move up and down by a predetermined distance in the entire vertical direction. Yes. A known mechanism can be adopted for the lifting operation of the loading platform 31. There are no particular restrictions on the shape and structure of the trailer vehicle body or the driver's seat, excluding the loading platform 31 and its lifting mechanism. Moreover, if a heavy article can be conveyed and the loading platform is configured to be able to move up and down, it is not limited to a trailer, and other conveying vehicles can be used.

  As shown in FIG. 3, a plurality of fixed cradles (40, 46) adjacent to each other in an arbitrary direction are paired with each other and arranged at a predetermined interval on the loading / unloading place. The distance between the adjacent fixed cradle is slightly larger than the width of the trailer 30 so that at least a part of the cargo bed can enter between them, and the carriage 12 overhangs on both sides of the trailer in the width direction on the cargo bed. The two end portions are appropriately set within a range where they can be directly received and supported by the top portions. Here, the fixed cradle 40 is disposed at both ends of the array, and one end portion of the supporting aggregates R1 and R2 projecting in the same direction from the side of the transport gantry 12 has a width substantially equal to the width thereof. And it is comprised so that it may mount and support in the top part which has the area | region of the length substantially equivalent to the length projected from these loading platforms 31 (refer FIG. 3 and FIG. 4). Further, the fixed cradle 46 is disposed at a position excluding both ends of the arrangement, and the oppositely projecting end portions of the two transport gantry 12 and 12 from both sides have a width substantially equal to the width thereof and the loading platforms 31. Are mounted and supported by the tops having a region having a length approximately equal to the length of the protrusion (the area of the latter is set to approximately twice that of the former). The fixed cradle 40, 46 enables the transport gantry 12 to be supported in a bridged state.

  Each of the fixed cradle 40, 46 can take various structures without particular limitation as long as it can withstand the load of the transport gantry loaded with heavy objects and the top is located at a predetermined height. 3 and FIG. 4, a plurality of H-shaped steels of the same size as the H-shaped steels constituting the supporting aggregates (R1, R2) are cut into a predetermined length, and three of these cut pieces are aligned. It is formed by stacking connected bodies (41 to 45; 47 to 51) arranged side by side so that their directions are alternately perpendicular. The stacking height is the moving height of the upper surface of the loading platform 31 when the loading platform 31 of the trailer 30 is moved up and down (in other words, the moving height of the lower end surface of the transport platform 12 mounted thereon). It can set suitably within the range. Further, the length of the fixed cradle 40, 46 in the direction in which the trailer 30 enters can be set as appropriate. For example, one end of each of the supporting aggregates R1, R2 of the transport cradle 12 that protrudes from the cargo bed 31 in the width direction is individually provided. May be supported by the fixed support base 40 (or 46), or may be supported by one fixed support base 40 (or 46).

  Next, it is assumed that a number of wave-dissipating blocks manufactured at the wave-dissipating block production plant are temporarily placed in the loading place (temporary storage area) that is the first cargo handling place, and this wave-dissipating block is unloaded as the second cargo handling place. Taking the case of transporting to the ground (unloading place) as an example, the method for transporting heavy objects of the present invention will be described. First, the supporting aggregates R1 and R2 face the loading platform 31 of the wave-dissipating block transport trailer 30 in the width direction, and both ends of the aggregates R1 and R2 are the same from both sides of the loading platform 31. The transportation platform 12 is placed so as to overhang by a certain length. At this time, if necessary, the loading platform 31 and the transportation platform 12 can be fixed using a known fixture or the like so that the transportation platform 12 is not displaced on the loading platform 31 during the movement of the trailer. .

  In this way, the trailer 30 on which the transport platform 12 is placed (fixed) on the loading platform 31 is moved to the temporary storage place (loading place) of the wave-dissipating block 10, and the wave-dissipating block 10 is attached to the transport platform 12 using a large crane. Load on top. At this time, if necessary, the wave-dissipating block 10 may be fixed on the transportation platform 12 using a known fixture or the like. Thereafter, the trailer 30 loaded with the wave-dissipating block 10 is loaded and unloaded.

  In the loading / unloading place, it is confirmed that the carriage 12 is not placed between a pair of adjacent fixed cradles 40 and 46 or 46 and 46 in the row of the fixed cradles 40, 46, 46,. After confirming, the trailer 30 is moved forward or backward to enter the fixed cradle 40, 46 (or 46, 46) that is not placed, with the cargo bed 31 raised. At this time, when a fixture is used to fix the transportation platform 12 and the load 31, the fixture is removed and the loading platform 31 and the transportation platform 12 are unlocked. This fixing tool can be removed before entering the row of the fixed support bases 40 and 46 in advance. When both ends in the length direction of the support aggregates R1 and R2 in the transport platform 12 are located above the fixed supports 40 and 46, the loading platform 31 of the trailer 30 is lowered, and both ends of the support aggregates R1 and R2 are moved. Receiving directly at the top of each fixed cradle 40 or 46, the transport cradle 12 is supported in a bridged state between the tops. The loading platform 31 is further lowered so that a gap is generated between the upper surface of the loading platform 31 and the lower surface of the transportation platform 12 mounted and supported on the fixed cradle 40 or 46. To leave. Thereby, the conveyance stand 12 is supported in the bridge | crosslinking state between the top parts of adjacent fixed stand, and it becomes possible to store in that state.

  The trailer 30 that has exited between the pair of fixed cradles 40 and 46 (or 46 and 46), if necessary according to the construction plan, again places the transport cradle 12 on the carrier 31 and needs this. Accordingly, it is possible to move to the loading place in a fixed state and repeat the transportation method.

  As described above, by using the transport system and transport method of the present invention, a heavy object is loaded onto a trailer using a crane at the loading site, and the cargo handling work using the crane is omitted at the unloading site where the trailer is transported. As a result, the cost associated with the crane and the placement of slinging workers are not required, and the economy is improved, and the loading and unloading operations with a crane that requires a long time can be halved. It is done.

  In the embodiment described above, the fixed cradle is installed at the loading / unloading place in the two loading / unloading places where the transport vehicle reciprocates. For example, the fixed cradle is installed at the loading place, and the method opposite to the above method is used. It is also possible to carry heavy objects with. In this case, a transport platform loaded with heavy objects is placed in a bridged state on an adjacent fixed stand, and a trailer with a load platform lowered is inserted between the adjacent fixed stands. The loading platform is lifted, and while the transport platform is supported in a state of being lifted from the fixed suspension platform, the loading platform is unloaded by appropriately adjusting the height of the loading platform, for example, by lowering the loading platform. It will be transported to.

It is a figure explaining the conveyance method of a wave-dissipating block as an example of the conveyance method of the heavy article of this invention. It is a figure which shows the loading state of the wave-dissipating block on the loading platform of the trailer of (b) in FIG. FIG. 2 is an enlarged view of (c-1) and (c-2) in FIG. 1. It is the figure which looked at the wave-dissipating block and conveyance stand on the fixed stand of FIG. 3 from the left side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wave-dissipating block 12 Carriage stand 121,122,123 Scaffold board | plate material 13 Vertical member 14 End part handrail 15 Staircase 30 with a handrail Trailer 31 Loading platform (possible to move up and down)
40, 46 Fixed cradle R1, R2 Support aggregate

Claims (4)

  A transport vehicle having a load platform capable of moving up and down, a transport platform mounted on the load platform in a state in which ends thereof are projected on both sides of the transport vehicle, and capable of loading heavy objects thereon; The transport vehicle is disposed at an interval that allows the transport vehicle to enter, and when the transport vehicle that has moved up to a predetermined position with the load platform raised in the meantime, lowers both ends of the transport platform. A heavy material transport system comprising: at least a pair of fixed cradles received at the top and supporting the transport cradle in a bridged state.   2. The heavy material transport system according to claim 1, wherein the heavy material is a wave-dissipating block.   In the first cargo handling area, the transport vehicle is provided with a load platform that can be moved up and down, the transport platform is placed on both sides in the width direction of the transport vehicle, and a heavy object is loaded thereon. To the second loading place, where the loading platform is raised between a pair of fixed cradles spaced apart by a distance slightly larger than the width of the loading platform of the transporting vehicle to a predetermined position. The heavy vehicle characterized in that the transporting vehicle that has entered lowers the loading platform and receives both ends of the transporting platform at the top of the fixed mounting platform to support and store the transportation platform in a bridged state. Transport method.   The method for transporting a heavy object according to claim 3, wherein the heavy object is a wave-dissipating block.

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