Heavy load transport system, transport device used in the system, and heavy load transport method

Abstract

To provide a heavy load transport system capable of improving transport efficiency while suppressing a cost increase, a transport device used for the system, and a heavy load transport method.SOLUTION: The frame 11 extends from a carry-in position to an installation position of the chiller 1, and a conveying device 21 including a roller portion and a base portion is disposed at the carry-in position. The chiller 1 is placed on and temporarily fixed to the base portion. The chiller 1 or the like is carried by rolling the roller part on the frame 11 by hand pushing or the like, and derailment of the carrying device 21 is prevented by the guide part 23 and the connecting part 24 of the carrying device 21. At the installation position, after the temporary fixing is released, the claw portion 77 of the claw jack 71 is inserted into the space on the upper side of the connecting portion 24 and the lower side of the chiller 1, and jacked up to lift the chiller 1. In the meantime, the transportation device 21 is removed, jacked down, and the chiller 1 is placed and fixed on the frame 11, thereby completing the installation of the chiller 1.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a heavy object transport system, a transport device used in the system, and a heavy object transport method. [Background technology]

[0002] Conventionally, cooling water circulation devices known as "chillers" have been installed on the rooftops of facilities (e.g., factories) where many industrial machines are used. Industrial machines generate heat when they operate, and if this heat is left unattended, the industrial machines may break down. Therefore, for example, air-cooled chillers are used as air conditioning heat sources to cool the industrial machines with conditioned air and maintain an appropriate temperature.

[0003] Chillers are heavy objects, so when a chiller located on the ground is to be installed on a rooftop or the like, a large lifting mechanism such as a crane is generally used (see, for example, Patent Document 1). Furthermore, because chillers generate vibrations during operation, they are installed and fixed in a predetermined installation position on a vibration-isolated stand installed on a rooftop or the like. For example, when a chiller placed on the ground is to be transported to an installation position on a vibration-isolated stand installed on a rooftop, the following two methods are mainly considered.

[0004] The first method is to use a large crane, such as a 220 ton crane (within the rotation range from the chiller position to the installation position), to lift the chiller from the ground, rotate the crane, and place the chiller in the designated installation position on the vibration-isolated stand. In other words, the large crane is used alone to transport the chiller to the installation position.

[0005] The second method involves using a medium-sized crane, such as a 65-ton crane (but not large enough to reach the installation location), to lift the chiller from the ground and place it in the designated location on the roof. The chiller is then moved sideways using a hand lift or temporary steel materials, and transported to the end of the vibration-isolated stand, i.e., the designated delivery location. In addition, multiple rollers are stretched at the delivery location in a direction perpendicular to the vibration-isolated stand. The chiller is then placed on the rollers, and the rollers' front-to-back positions are swapped or adjusted as necessary to suit the movement situation, before being moved to the installation location. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 9-126540 Summary of the Invention [Problem to be solved by the invention]

[0007] However, while the first method can shorten the work time and simplify the work content, it requires work such as arranging for the large crane itself, obtaining a road use permit, applying for lane restrictions, installing various equipment such as restriction signs and cones, and arranging for traffic control personnel, so the cost of the crane becomes enormous.

[0008] Furthermore, while the second method can reduce crane costs to some extent compared to the first method, it requires the use of rollers to transport the chiller from the delivery position to the installation position on the vibration-isolated platform. The rollers are not fixed and are always unstable, and there is a concern that the chiller may gradually tilt as it is moved. Therefore, transportation work must be carried out with the utmost care to prevent the chiller from falling off. This increases the burden on workers and the working time, which may result in a decrease in work efficiency.

[0009] The present invention has been made to solve the problems exemplified above, and its purpose is to provide a heavy object transport system, a transport device used in the system, and a heavy object transport method that can improve transport efficiency while suppressing cost increases. [Means for solving the problem]

[0010] The following describes each means suitable for achieving the above objects, etc., by item. Note that, as necessary, the effects and advantages specific to the corresponding means will be added.

[0011] Means 1. A heavy object transport system for installing a predetermined heavy object, which is carried to a carrying-in position, at an installation position on a pair of platforms laid parallel to each other and forming a rail shape, comprising: The pair of stands extend from the loading position to the installation position, a transport device that is movable in the longitudinal direction of the pedestal, that is detachably installed on the pedestal, and that can place and temporarily fix the heavy object thereon; a first lifting device that can be operated to lift and lower the heavy object at or near the loading position so as to place the heavy object on the transporting device; a second lifting device that can be operated to lift the heavy object from the conveying device at or near the installation position, the transport device can be installed on each of the pair of platforms, The transport device includes a pair of front and rear main bodies spaced a predetermined distance apart in the longitudinal direction of the platform; a connecting portion that connects the main body portions to each other; a guide portion that prevents derailment of the transport device by guiding an outer surface of the frame, The main body includes a roller portion that can slide on the base; and a base portion on which the heavy object can be placed and temporarily fixed, When the transport device is installed, the upper surface of the connecting portion is flush with or at a lower height than the upper surface of the platform, A heavy object transport system characterized in that the second lifting device can be raised and lowered by inserting a part of it into the space above the connecting portion and below the heavy object placed on the main body portion.

[0012] According to the first means, a heavy object carried into a predetermined carrying-in position by a hand lift, temporary steel materials, or the like can be lifted and lowered using the first lifting device. That is, a transport device is installed in advance for each pair of platforms, and these are arranged at the carrying-in position. Then, the carried-in heavy object is placed on each transport device by the first lifting device at the carrying-in position and temporarily fixed there. This allows the heavy object and the transport device to be moved along the platforms.

[0013] At this time, since the pair of stands extend from the loading position to the installation position, heavy objects temporarily fixed on each transport device at the loading position can be transported to the designated installation position by pulling with a rope or pushing by hand.

[0014] Furthermore, the heavy object transported to the installation position can be lifted using the second lifting device. That is, the heavy object transported to the installation position is released from the temporary fixation with each transporting device, and then lifted by the second lifting device, and each transporting device is removed from the pedestal during the lifting, and the heavy object can be installed on the pedestal.

[0015] According to this aspect, the conveying device includes a main body having a roller unit and a base, and a guide unit. Therefore, when the conveying device is installed on a pair of platforms, the roller unit allows the conveying device to move along the platforms, and the base allows a heavy object to be placed on and temporarily secured thereto. Furthermore, the guide unit prevents significant displacement in a direction perpendicular to the platforms, eliminating concerns that the conveying device may deviate from the platforms. In short, the platforms function as rails, the roller unit as a movement mechanism on the rails, the base as a temporary securing mechanism for the heavy object, and the guide unit as a derailment prevention mechanism, eliminating the risk of the conveying device and, ultimately, the heavy object deviating from the platforms. Therefore, unlike conventional techniques that required careful transport using rollers, this aspect enables heavy objects to be transported stably and smoothly. As a result, the use of large cranes and other equipment is eliminated, and transportation on the platforms is facilitated, thereby suppressing costs and improving transportation efficiency.

[0016] Furthermore, the transport device is constructed by integrating a pair of front and rear main bodies with a connecting section. Therefore, by installing one transport device on each of the pair of platforms, it is possible to support a heavy object at four points. This not only makes it easy to install and remove the transport device itself, but also to accurately and easily align the heavy object when placing it on the platform. As a result, workability can be improved and work time can be significantly reduced.

[0017] Furthermore, in this configuration, lifting and lowering operations are possible by inserting part of the second lifting device into the space above the connecting part and below the heavy object placed on the main body in the installed position. Part of the second lifting device can be smoothly inserted from the outer surface of the pair of stands, which has a relatively large amount of space, making it easy to lift and lower the second lifting device. As a result, workability can be dramatically improved in this respect as well.

[0018] Means 2. A heavy object transport system as described in Means 1, characterized in that the platform has temporary fixing holes corresponding to holes formed in the bottom of the heavy object, and the heavy object can be temporarily fixed to the platform by aligning the holes with the temporary fixing holes and fastening them with a specified fastening member.

[0019] According to the second aspect, the heavy object can be easily and reliably temporarily fixed to each of the transport devices by aligning the holes formed in the bottom of the heavy object with the temporary fixing holes in the base of the transport device and fastening them with fastening members. As a result, the heavy object can be transported in a more stable state without reducing workability.

[0020] Means 3. A heavy-duty transport system as described in Means 1, characterized in that the connecting portion is capable of preventing derailment of the transport device by guiding the outer surface of the platform.

[0021] According to the third aspect, the conveyance device is guided not only by the guide portion but also by the connecting portion. This makes it possible to further prevent large displacement in the direction perpendicular to the base, and further eliminates concerns that the conveyance device may deviate from the base. As a result, the heavy object can be conveyed in a more stable state.

[0022] Means 4. A heavy-duty transport system according to Means 1, characterized in that the second lifting device is a claw jack.

[0023] According to Measure 4, the use of a simple claw jack makes it easier to raise and lower the second lifting device. Furthermore, if the height of the space is higher than the height of the claw jack, the claw jack body can be placed on the platform where the connecting part is located, eliminating the need for a separate platform to raise the height. This further improves workability.

[0024] Means 5: A heavy-duty transport system according to any one of means 1 to 4, characterized in that the guide section and the connecting section are integrally provided.

[0025] According to the fifth aspect, by providing guide sections on the front and rear main body sections, connection by the connecting section can be realized. Therefore, it is possible to further prevent a situation where the transport device is displaced in a direction perpendicular to the base, and it is possible to further eliminate concerns that the transport device may deviate from the base. As a result, heavy objects can be transported in a more stable state.

[0026] Means 6: A transporting device used in the heavy object transport system according to Means 1.

[0027] According to the sixth aspect, the same effects as those of the first aspect can be achieved.

[0028] Means 7. A method for transporting a heavy object on a pair of platforms that are laid parallel to each other, extend from a carry-in position to an installation position, and form a substantially rail shape, for installing a predetermined heavy object that has been carried into the carry-in position at the installation position, comprising: a pair of front and rear main bodies each having a roller portion and a base portion; a connecting portion that connects the main body portions to each other while spaced apart by a predetermined distance; a conveying device including a guide portion that prevents derailment by guiding the outer surface of the frame, a transport device installation process for installing the transport devices on the pair of platforms laid at the carry-in position; an installation process of placing the heavy object on both transport devices at the carry-in position using a first lifting device that can be lifted and lowered, and then temporarily fixing the heavy object; a transporting step of transporting the heavy object and the transport device on the pair of platforms to the installation position; At the installation position, the temporary fixation of the heavy object to both of the transport devices is released; a lifting step of inserting a part of a second lifting device that can be raised and lowered into a space above the connecting part whose upper surface is located at the same level as or a lower level than the upper surface of the platform and below the heavy object placed on the main body, and then lifting the heavy object from above both transport devices using the second lifting device; a conveying device removing step of removing both conveying devices from the pair of stands; and a heavy object installation step of placing and installing the heavy object on the pair of platforms.

[0029] According to the seventh aspect, the same effects as those of the first aspect can be achieved. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 10 is a perspective view showing a state in which a transport device is installed on a stand. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 10 is a perspective view showing a state in which the claw jack is jacked up. [Figure 8] FIG. 10 is a perspective view showing the chiller being installed on the transport device at the loading position. [Figure 9] FIG. 10 is a perspective view showing a state in which the transport device and the chiller are being transported on a stand. [Figure 10] FIG. 10 is a partially enlarged perspective view showing the claw jack placed on the base in the installation position. [Figure 11] FIG. 10 is a partially enlarged perspective view showing the state in which the claw jack is jacked up and the chiller is lifted up. [Figure 12] FIG. 10 is a partial enlarged perspective view showing the state in which the transporter has been removed while the chiller is being jacked up. [Figure 13] FIG. 2 is a perspective view showing the chiller installed in the installation position. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, an embodiment will be described with reference to the drawings.

[0032] On the rooftop of a factory or the like, for example, the pedestals 11 (see FIG. 2 etc.) are laid in a parallel state, and a plurality of chillers 1 are installed at predetermined installation positions on the pedestals 11.

[0033] As shown in FIG. 1, the chiller 1 as a heavy object includes a substantially rectangular parallelepiped housing 2 and a fixed frame 3 attached to the lower surface of the housing 2. Further, inside the housing 2, a heat exchanger, a fan motor, a compressor, etc. (not shown) are provided. Furthermore, the fixed frame 3 is composed of a plurality of steel materials, and mounting holes 4 as hole portions are provided at four corners, one at each corner.

[0034] Also, as shown in FIG. 2, the pedestal 11 is constituted by laying and fixing in series the anti-vibration pedestal units 12 having a “day” shape in plan view from the loading position to the installation position of the chiller 1. Each anti-vibration pedestal unit 12 includes a lower pedestal 13, a substantially cylindrical vibration absorber 14, and an upper pedestal 15. The lower pedestal 13 and the upper pedestal 15 have substantially the same shape and are composed of a plurality of square steel pipes (having a “square” cross section). In addition, screw holes 16 are provided at four corners of the upper pedestal 15, one at each corner. In the present embodiment, the linear portions on both end sides in the horizontal direction sandwiching the intermediate member 12a of the anti-vibration pedestal unit 12 of the pedestal 11 correspond to “a pair of pedestals having a substantially rail shape”.

[0035] Furthermore, in the present embodiment, the conveying device 21 shown in FIG. 3 is used to convey the pedestal 11 from the loading position to the installation position. The conveying devices 21 are respectively installed one by one with respect to the linear portions on both sides of the pedestal 11. As shown in FIG. 4, the conveying device 21 includes a pair of front and rear main body portions 22 provided at a predetermined distance apart in the longitudinal direction of the pedestal 11, a guide portion 23 for guiding the outer surface of the pedestal 11 to prevent the conveying device 21 from getting off the track, and a connecting portion 24 for connecting the guide portions 23 (main body portions 22) to each other.

[0036] 5, the main body 22 is made up of a base 31 and a platform 41 provided on the base 31. The base 31 is generally rectangular and includes a frame 33 having holes 32 provided at each of the four corners, a rotor 35 rotatably provided at the center of the upper part of the frame 33 and having a screw hole 34, and a pair of rollers 36 provided at the front and rear of the frame 33.

[0037] Furthermore, the base 41 is attached to the upper surface of the rotating body 35. The base 41 includes a plate-shaped portion 42 and support portions 43 that are arranged at equal intervals on the upper surface of the plate-shaped portion 42 and on which the chiller 1 can be placed. Furthermore, a hole 44 is provided in the center of the plate-shaped portion 42, and a screw hole 45 is provided in one corner of the plate-shaped portion 42 as a temporary fixing hole.

[0038] The guide section 23 also has an outer plate 51 and a reinforcing plate 52 attached to its inner side. The guide section 23 has mounting holes 53 at positions corresponding to the holes 32 of the frame 33. The connecting section 24 is narrower in vertical width than the guide section 23 (outer plate 51), and the lower ends of the pair of outer plates 51 are connected to each other by the connecting section 24. In other words, the connecting section 24 and the outer plate 51 (guide section 23) are formed as a single metal plate that is concave in side view and are integrated together. In this embodiment, the connecting section 24, like the guide section 23, is located on the outer side of the rail-shaped platform 11, thereby preventing derailment of the conveyance device 21 during transport.

[0039] When assembling the transport device 21, first, the screw holes 34 of the rotor 35 are aligned with the holes 44 of the plate-like portion 42, and then the short bolts 61 are fastened. This attaches the platform portion 41 to the base 31, completing the assembly of each main body portion 22. Next, the holes 32 of each frame 33 are aligned with the mounting holes 53 of each guide portion 23, and then the long bolts 62 are inserted and fastened with nuts 63. This attaches the guide portions 23 to the main body portion 22, completing the assembly of the transport device 21.

[0040] In this embodiment, a claw jack 71 is used as the second lifting device at the desired installation position, as shown in Figures 6 and 7. The claw jack 71 includes a base 72, an operating unit 73 that adjusts the jack-up height, a hydraulic tank 74, a shaft 75 that extends vertically from inside the hydraulic tank 74 and can be extended and retracted up and down, and a jack-up unit 76 that is connected to the shaft 75. A claw 77 is provided at the bottom of the jack-up unit 76, protruding on the side opposite the operating unit 73.

[0041] When using the claw jack 71, as shown in Figure 7, the shaft 75 is raised by repeatedly moving the operating part 73 up and down. As the shaft 75 moves, the jack-up part 76 (claw part 77) also rises at the same time, performing jack-up. After jacking up, the jack-up part 76 (claw part 77) can be lowered by loosening the release valve (not shown) of the claw jack 71.

[0042] Next, a method for transporting and installing the chiller 1 will be described.

[0043] As described above, in this embodiment, racks 11 are installed in parallel on the roof of a factory or the like, and chiller 1 is installed at a predetermined installation position on racks 11. In this embodiment, chiller 1 is lifted from the ground using a medium-sized crane, such as a 65-ton class crane, and placed in advance at a predetermined temporary installation position on the roof that is different from racks 11. Then, chiller 1 from the temporary installation position is transported to the vicinity of the predetermined installation position on rack 11 using a hand lift (not shown) as a first lifting device.

[0044] At the loading position, as shown in FIG. 3, one transport device 21 pre-assembled according to the assembly procedure described above is placed (placed) on each of the linear portions on both sides of the platform 11.

[0045] Once the placement of the transporting devices 21 is complete, the chiller 1 transported by the hand lift is lifted up near the loading position. Then, as shown in FIG. 8 , the position of the hand lift (tiller 1) is adjusted relative to the transporting devices 21 so that the mounting holes 4 of the chiller 1 are positioned directly above the screw holes 45 of each transporting device 21 installed on the rack 1. Once this position is determined, the hand lift is lifted down and the chiller 1 is placed on the top surface of the support part 43 of the transporting device 21. Once it is confirmed that the screw holes 45 are aligned with the mounting holes 4, a total of four short bolts 61 are tightened, one from above each mounting hole 4. This completes the temporary fixation of the chiller 1 to the transporting devices 21.

[0046] 9, the chiller 1 and the transport device 21 are transported from the delivery position to the installation position by pulling with a rope or pushing by hand. The transport is carried out smoothly by the roller portion 36 of the transport device 21 rolling on the base 11.

[0047] Once the chiller 1 approaches the installation position, the horizontal position of the transporting device 21 is adjusted so that the mounting holes 4 of the chiller 1 are positioned directly above the screw holes 16 of the base 11 at the installation position (see FIG. 12, etc.). Once this position is determined, that is, once transportation to the installation position is complete, as shown in FIG. 10, the claw portions 77 of the claw jack 71 are inserted into the space created above the top surface of the base 11 and below the chiller 1 on one side of the transporting device 21, and the claw jack 71 is placed on the base 11. Note that the connecting portions 24 connect the lower ends of the guide portions 23, and the upper surface of the connecting portions 24 is positioned at a lower height than the upper surface of the base 11. This prevents the connecting portions 24 from interfering with the base 72 of the claw jack 71, etc.

[0048] Next, the four short bolts 61 that were attached at the delivery position are removed to release the temporary fixation of the chiller 1. Then, as shown in Figure 11, the operating part 73 of the claw jack 71 is repeatedly moved up and down to jack it up. This operation moves the claw part 77 upward, lifting the chiller 1 on one side of the transporter 21, and the bottom surface of the chiller 1 and the top surface of the transporter 21 are separated from each other.

[0049] During this separation, as shown in FIG. 12, the transporting device 21 that had been installed (placed) on the base 11 is quickly removed. Then, the claw jack 71 is jacked down to place the chiller 1 on the base 11. At this time, it is confirmed that the screw holes 16 of the base 11 are aligned with the mounting holes 4 of the chiller 1. Then, the same work using the claw jack 71 described above (see FIGS. 10 to 12) is performed on the other side of the transporting device 21. Of course, the work using the claw jack 71 may be performed on both sides at the same time.

[0050] Thereafter, a total of four short bolts 61 are fastened, one from above each mounting hole 4. This completes the installation of the chiller 1 in the predetermined installation position, as shown in FIG.

[0051] As described above in detail, according to this embodiment, the transporting device 21 includes the main body 22 having the roller units 36 and the base unit 41, and the guide unit 23. Therefore, when the transporting device 21 is installed on each of a pair of pedestals 11, the roller units 36 allow the transporting device 21 to move along the pedestals 11, and the base unit 41 allows the tiller 1 to be placed on and temporarily fixed thereon. Furthermore, the guide unit 23 prevents the transporting device 21 from being significantly displaced in a direction perpendicular to the pedestal 11, thereby eliminating concerns that the transporting device 21 may deviate from the pedestal 11. In short, the pedestal 1 functions as a rail, the roller units 36 as a movement mechanism on the rail, the base unit 41 as a temporary fixing mechanism for the tiller 1, and the guide unit 23 as a derailment prevention mechanism, so there is no risk of the transporting device 21, and therefore the tiller 1, deviating from the pedestal 1. Therefore, unlike the prior art, which required careful transport using rollers, this embodiment allows for stable and smooth transport of chiller 1. As a result, there is no need to use a large crane or the like, and transportation on frame 11 is easy, which helps to suppress cost increases and improves transportation efficiency.

[0052] Furthermore, the carrier device 21 is configured by integrating a pair of front and rear guide sections 23 (main body sections 22) with a connecting section 24. Therefore, by installing one carrier device 21 on each of a pair of stands 11, the chiller 1 can be supported at four locations. This not only makes it easy to install and remove the carrier device 21 itself, but also allows for accurate and easy positioning when placing the chiller 1. As a result, workability can be improved and work time can be significantly reduced. In addition, connection can be achieved using the connecting section 24. This improves workability when assembling the carrier device 21.

[0053] Furthermore, in this embodiment, when the chiller is in the installed position, the claw jack 71 can be raised and lowered by inserting the claw 77 of the claw jack 71 into the space above the base 11 and below the chiller 1. The claw jack 71 can be smoothly inserted from the outer surfaces of the pair of bases 11, where there is relatively more space, making it easy to raise and lower the claw jack 71. As a result, workability can be dramatically improved in this respect as well.

[0054] Furthermore, by aligning the mounting holes 4 formed in the chiller 1 with the threaded holes 45 in the base 41 of the transport device 21 and fastening them with short bolts 61, the chiller 1 and each transport device 21 can be temporarily fixed easily and reliably. As a result, the chiller 1 can be transported in an even more stable state without reducing workability.

[0055] Additionally, in this embodiment, the chiller 1 is guided not only by the guide portion 23 of the transport device 21 but also by the connecting portion 24. This makes it possible to further prevent large displacements in the direction perpendicular to the base 11, further eliminating concerns that the transport device 21 may deviate from the base 11. As a result, the chiller 1 can be transported in an even more stable state.

[0056] Also, lifting and lowering operations can be easily performed by using the simple claw jack 71. Furthermore, the claw jack 71 can be placed on the platform 11, eliminating the need for a separate platform for raising the platform. This further improves workability.

[0057] The present invention is not limited to the above-described embodiment, and may be implemented as follows: Of course, other applications and modifications not exemplified below are also possible.

[0058] (a) In the above embodiment, a chiller 1 is cited as an example of a heavy object, but the heavy object is not limited to the chiller 1. For example, the heavy object may be a large industrial robot, measuring instruments, machine tools, transport machinery, various power generation devices, etc. Furthermore, the installation location of the heavy object is not limited to a rooftop, but may also be indoors.

[0059] (b) In the above embodiment, the mount 11 is configured by installing and fastening multiple vibration isolation mount units 12 from the delivery position to the installation position of the chiller 1, but this configuration is not necessarily limited to this as long as the installation position of the heavy object is on the mount 11. For example, the mount may simply be configured with a pair of rails, or may have a configuration without vibration isolation function.

[0060] (c) In the above embodiment, the vibration-isolating mount unit 12 (mount 11) is composed of multiple square steel pipes with a square cross section, but the cross-sectional shape and material are not particularly limited as long as they do not interfere with the transportation and installation of heavy objects. Regarding the shape of the steel material, for example, it may be a C-shaped steel with the outer surface of the web as the upper surface, or an H-shaped steel or I-shaped steel with the outer surface of one flange as the upper surface. Furthermore, regarding the material, it may be made of, for example, steel, stainless steel, aluminum, wood, etc.

[0061] (d) In the above embodiment, the main body 22 of the transport device 21 is composed of the base 31 and the platform 41, but the shape and configuration of each component are not particularly limited. For example, the number of rollers 36 in the base 31 may be increased, or the rotor 35 may be omitted. Furthermore, while the platform 41 has four support portions 43 on the plate-shaped portion 42, the number of support portions may be increased or decreased, or they may be omitted. In addition, the base 31 and the platform 41 may be configured as an integrated unit rather than as separate bodies.

[0062] (e) In the above embodiment, the four short bolts 61 are removed at the installation position, the chiller 1 is released from its temporary fixation, and then the claw jack 71 is used to jack up the chiller 1. However, this order does not necessarily have to be followed. For example, at the installation position, the claw jack 71 may first be used to jack up the chiller 1 and the transporting device 21 temporarily fixed to the chiller 1, and during this jacking up, the four short bolts 61 may be released and the transporting device 21 may be removed. In this case, for example, the short bolts 61 may be removed at a height that is relatively easy to work at, further improving workability.

[0063] (f) In the above embodiment, a hand lift is used as the first lifting device, but other lifting devices such as a forklift may also be used. Also, in the above embodiment, a claw jack 71 is used as the second lifting device, but other lifting devices such as a pantograph jack or garage jack may also be used. [Explanation of symbols]

[0064] 1...chiller, 4...mounting hole, 11...frame, 21...transport device, 22...main body, 23...guide, 24...connecting portion, 36...roller, 41...base, 45...screw hole, 61...short bolt, 71...claw jack, 77...claw.

Claims

1. A heavy object transport system for installing a predetermined heavy object, which has been carried to a carrying-in position, at an installation position on a pair of platforms that are laid parallel to each other and have a substantially rail shape, comprising: The pair of stands extend from the loading position to the installation position, a transport device that is movable in the longitudinal direction of the pedestal, that is detachably installed on the pedestal, and that can place and temporarily fix the heavy object thereon; a first lifting device that can be operated to lift and lower the heavy object at or near the carry-in position so as to place the heavy object on the transporting device; a second lifting device that can be operated to lift the heavy object from the conveying device at or near the installation position, the transport device can be installed on each of the pair of platforms, The transport device includes a pair of front and rear main bodies spaced a predetermined distance apart in the longitudinal direction of the platform; a connecting portion that connects the main body portions to each other; a guide portion that prevents derailment of the transport device by guiding an outer surface of the frame, The main body includes a roller portion that can slide on the base; and a base portion on which the heavy object can be placed and temporarily fixed, When the transport device is installed, the upper surface of the connecting portion is flush with or at a lower height than the upper surface of the platform, A heavy object transport system characterized in that the second lifting device can be raised and lowered by inserting a part of it into the space above the connecting portion and below the heavy object placed on the main body portion.

2. The heavy object transport system described in claim 1, characterized in that the platform portion has temporary fixing holes corresponding to holes formed in the lower part of the heavy object, and the heavy object can be temporarily fixed to the platform portion by aligning the holes with the temporary fixing holes and fastening them with a specified fastening member.

3. 2. The heavy-duty transport system according to claim 1, wherein the connecting portion is capable of preventing derailment of the transport device by guiding the outer surface of the platform.

4. 2. The heavy-duty transport system according to claim 1, wherein the second lifting device is a claw jack.

5. 5. A heavy-duty transport system according to claim 1, wherein the guide portion and the connecting portion are integrally provided.

6. A transporting device used in the heavy object transport system according to claim 1.

7. A method for transporting a heavy object on a pair of platforms that are laid parallel to each other, extend from a carry-in position to an installation position, and form a substantially rail shape, for installing a predetermined heavy object that has been carried into the carry-in position at the installation position, the method comprising: a pair of front and rear main bodies each having a roller portion and a base portion; a connecting portion that connects the main body portions to each other while spaced apart by a predetermined distance; a conveying device including a guide portion that prevents derailment by guiding the outer surface of the frame, a transport device installation process for installing the transport devices on the pair of platforms laid at the carry-in position; an installation process of placing the heavy object on both transport devices at the carry-in position using a first lifting device that can be lifted and lowered, and then temporarily fixing the heavy object; a transporting step of transporting the heavy object and the transport device on the pair of platforms to the installation position; At the installation position, the temporary fixation of the heavy object to both of the transport devices is released; a lifting step of inserting a part of a second lifting device that can be raised and lowered into a space above the connecting part, the upper surface of which is located at the same level as or at a lower height than the upper surface of the platform, and below the heavy object placed on the main body, and then lifting the heavy object from above both transport devices using the second lifting device; a conveying device removing step of removing both conveying devices from the pair of stands; and a heavy object installation step of placing and installing the heavy object on the pair of platforms.

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