How to transport heavy objects

Abstract

To provide a method for transporting heavy objects capable of transporting various kinds of heavy objects under optimum conditions. [Solution] This method involves moving self-propelled multi-axle transport carts D1, D2, each having a loading platform 12 and multiple axles 14, below the heavy object 10, then supplying hydraulic oil to multiple loading platform lifting actuators provided between the loading platform 12 and each axle 14 to raise the loading platform 12, and then pushing up the heavy object 10 and placing it on the loading platform 12 for transport.When pushing up the heavy object 10 using the loading platform 12 of the self-propelled multi-axle transport carts D1, D2, the supply of hydraulic oil to some of the multiple loading platform lifting actuators is cut off, and some of the multiple axles 14 are lifted.

Description

[Technical Field]

[0001] The present invention relates to a method for transporting heavy loads such as various plant facilities such as power plants, water production plants, petroleum plants, and chemical plants, large-scale structures (buildings, bridges) made of concrete or steel, and components that constitute these structures. [Background technology]

[0002] BACKGROUND ART Self-propelled multi-axle transport carts have conventionally been used to transport heavy objects (see, for example, Patent Document 1). This self-propelled multi-axle transport cart has a loading platform and multiple axles.After entering underneath a heavy object, it raises the loading platform by supplying hydraulic oil to multiple loading platform lifting actuators located between the loading platform and each axle, and then pushes up the heavy object, placing it on the loading platform and transporting it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6484443 Summary of the Invention [Problem to be solved by the invention]

[0004] When transporting heavy objects using a self-propelled multi-axle transport vehicle, the transport conditions for the heavy objects, such as the type and number of self-propelled multi-axle transport vehicles to be used, their locations, and the positions at which the heavy objects are placed on the loading platform, are determined in advance based on the weight, center of gravity, shape, etc. However, there are many different types of heavy objects, and it is sometimes not possible to transport each heavy object using a self-propelled multi-axle transport vehicle under the optimal conditions for that object. For example, the heavy object cannot be transported stably, and there is a risk of damage to the heavy object or the self-propelled multi-axle transport vehicle.

[0005] An object of the present invention is to provide a method for transporting heavy objects that can transport various types of heavy objects under optimal conditions. [Means for solving the problem]

[0006] The inventors of the present invention have conducted extensive research to find the optimum conditions for transporting various types of heavy objects using a self-propelled multi-axle transport vehicle having a platform and multiple axles. As a result, they have found that the above-mentioned problem can be solved by cutting off the supply of hydraulic oil to some of the platform lifting actuators provided between the platform and the multiple axles, respectively, when a heavy object is pushed up by the platform of the self-propelled multi-axle transport vehicle, and lifting some of the axles. This has led to the completion of the present invention.

[0007] The gist of the present invention is as follows. [1] A method for transporting a heavy object, comprising: moving a self-propelled multi-axle transport vehicle having a platform and a plurality of axles under a heavy object; supplying hydraulic oil to a plurality of platform lifting actuators respectively provided between the platform and each axle to lift the platform; and pushing up the heavy object and placing it on the platform for transport; A method for transporting heavy objects, characterized in that when the heavy object is pushed up by the loading platform of the self-propelled multi-axle transport cart, the supply of hydraulic oil to some of the loading platform lifting actuators is cut off, and some of the axles are lifted.

[0008] [2] A method for transporting a heavy object, the method comprising: a heavy object comprising a main body of the heavy object, a plurality of support columns arranged upright at intervals to support the main body of the heavy object, and a horizontal member connecting the support columns; a self-propelled multi-axle transport vehicle having a platform and a plurality of axles is advanced below the horizontal member; thereafter, hydraulic oil is supplied to a plurality of platform lifting actuators respectively provided between the platform and each axle to lift the platform; the horizontal member is pushed up, and the object is placed on the platform for transport; A method for transporting heavy objects, characterized in that when the horizontal member is pushed up by the platform of the self-propelled multi-axle transport cart, the supply of hydraulic oil to some of the platform lifting actuators is cut off, and some of the axles are lifted.

[0009] [3] A method for transporting heavy objects according to [2] above, characterized in that the position at which the upward force acts on the horizontal member is adjusted so that the same upward force acts on each of the support columns. [Effects of the Invention]

[0010] According to the method for transporting heavy objects of the present invention, various types of heavy objects can be transported under optimal conditions. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view showing a state in which a heavy object is being transported by a method for transporting a heavy object according to a first embodiment of the present invention. [Figure 2] FIG. [Figure 3] 1A and 1B are a side view and a front view, respectively, showing the state of transporting a heavy object using a method for transporting a heavy object according to a conventional example. [Figure 4] FIG. 10 is a side view showing a state in which a heavy object is being transported by a method for transporting a heavy object according to a second embodiment of the present invention. [Figure 5] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] The method for transporting heavy objects of the present invention includes: moving a self-propelled multi-axle transport vehicle having a platform and a plurality of axles under the heavy object; supplying hydraulic oil to a plurality of platform lifting actuators provided between the platform and each axle to raise the platform; and then pushing up the heavy object and placing it on the platform for transport. When pushing up a heavy object using the platform of a self-propelled multi-axle transport cart, this method involves cutting off the supply of hydraulic oil to some of the platform lifting actuators among multiple platform lifting actuators, thereby lifting some of the multiple axles.

[0013] Heavy objects to be transported using the present invention include, for example, various types of plant equipment such as power plants, water production plants, petroleum plants, and chemical plants, large-scale structures (buildings, bridges) made of concrete or steel, and the components that make up these structures. In particular, when the heavy object is, for example, a variety of plant equipment, and comprises a heavy object body, a plurality of support pillars arranged upright at intervals to support the heavy object body, and a horizontal member connecting the support pillars, the horizontal member is the object to be pushed up by the platform of the self-propelled multi-axle transport cart, and when this horizontal member is pushed up, some of the multiple axles are lifted.

[0014] This makes it possible to adjust the position at which the lifting force acts on the heavy object or horizontal member, and to select the optimum transport conditions suitable for various types of heavy objects, thereby enabling the heavy objects to be transported stably while maintaining their quality.

[0015] First, with reference to FIGS. 1 and 2, the self-propelled multi-axle transport vehicles D1 and D2 used in the method for transporting a heavy object according to the first embodiment of the present invention will be described. The self-propelled multi-axle transport vehicles D1, D2 (hereinafter referred to as vehicles D1, D2) used to transport the heavy load 10 have the same configuration, and each is provided with a hydraulic power source 11 (power pack), and the loading platform 12 can be raised and lowered depending on whether or not hydraulic oil (oil) is supplied from this hydraulic power source 11. The vehicle D1, D2 is configured to be remotely operable using a known remote control held by an operator. Note that the method of operating the vehicle D1, D2 is not limited to the above configuration, and for example, the vehicle D1, D2 may be provided with a removable driver's cab (cabin) at the front, with the hydraulic power source 11 connected to the rear, and the operator may stand in the cab and directly operate the vehicle D1, D2. Moreover, the hydraulic power source 11 can also be arranged separately from the self-propelled carriage 13, which is the carriage body of the carriages D1 and D2.

[0016] A plurality of axles 14, each with wheels 14a (tires) attached to both axial sides, are attached to the lower part of the platform 12 of the self-propelled cart 13, and are independently rotatable around a vertical axis. Specifically, the self-propelled cart 13 is a six-axle vehicle in which twelve axles 14 are attached, one on each side in the width direction of the self-propelled cart 13 as shown in FIG. 2, and six axles 14 spaced apart along its length as shown in FIG. 1. The number of axles of the self-propelled cart may be adjusted appropriately depending on the weight of the object to be transported. For example, the self-propelled cart may be configured by connecting multiple axles, such as three-axle or four-axle vehicles, in series or in parallel, in addition to six-axle vehicles. This allows the multiple axles 14 to be rotated individually depending on the purpose, and the steering mode of the self-propelled carriage 13 to be changed in various ways, making it possible to perform various driving modes, such as normal driving, circular driving, diagonal driving, transversal driving, and fan-shaped driving.

[0017] A link mechanism 15 (bogie and arm) and a hydraulic jack (an example of an actuator for raising and lowering the loading platform: not shown) are provided between the loading platform 12 and each axle 14, and the distance between the loading platform 12 and the axle 14, i.e., the height of the loading platform 12 relative to the ground G, can be adjusted by whether or not hydraulic oil is supplied to the hydraulic jack by the hydraulic source 11. The supply of hydraulic oil from the hydraulic source 11 to the hydraulic jacks attached to each axle 14 can be carried out mainly through two systems, for example, a system of six hydraulic jacks attached to one side of the self-propelled carriage 13 in the width direction, and a system of six hydraulic jacks attached to the other side in the width direction. Alternatively, the supply of hydraulic oil can be carried out mainly through a total of four systems, for example, front, rear, left and right in a plan view of the self-propelled carriage 13. Here, the supply of hydraulic oil to the multiple hydraulic jacks in each system can be cut off (stopped) by, for example, closing multiple valves (not shown) provided in each system.

[0018] Considering the scale (size) of the heavy objects to be transported, it is preferable to use two or more trains of the above-described bogies at the same time as shown in FIG. 2, but one train may also be used. Here, when multiple bogies are used, they can be operated synchronously. As a result, for example, as shown in Figure 2, bogies D1 and D2 arranged in parallel run while maintaining that state, so that a heavy object 10 placed across the loading platforms 12 of two self-propelled bogies 13 can be transported to the destination without falling off the loading platform 12 or shifting position on the loading platform 12, while being kept horizontal.

[0019] Next, a method for transporting a heavy object according to a first embodiment of the present invention will be described with reference to FIGS. first, heavy Based on the weight, center of gravity, shape, etc. of the heavy object 10, the transport conditions for the heavy object, such as the type and number of carts to be used, their positions, and the position where the heavy object 10 is placed on the loading platform, are determined. Here, two sets of carts D1 and D2 are used, and each cart D1 and D2, with its loading platform 12 lowered, is caused to enter below the heavy object 10 placed at a predetermined height. 2, the carriages D1 and D2 are arranged parallel to each other in a plan view, with the center of gravity of the heavy load 10 located between the adjacent carriages D1 and D2. Although the hydraulic source 11 sides of the carriages D1 and D2 face in the same direction, they may face in opposite directions.

[0020] In the above-described state, when hydraulic oil is supplied to all the hydraulic jacks to raise the platform 12 as shown in FIG. 3(a), the acting span of the lifting force is within the range R (the range from the widthwise center position C1 of one of the carriages D1 to the widthwise center position C2 of the other carriage D2) as shown in FIG. 3(b). At this time, the load on the platform 12 from the heavy object 10 differs between the area where the heavy object 10 is placed and the area where it is not placed, and a bending moment is generated in the platform 12 in the width direction of each of the carriages D1 and D2. This does not result in optimal transport conditions for the heavy object 10, and there is a risk that the heavy object 10 cannot be transported stably and that the platform 12, etc. may be damaged.

[0021] Therefore, as shown in FIGS. 1 and 2, the supply of hydraulic oil to some of the hydraulic jacks is cut off to adjust the position at which the lifting force acts on the heavy load 10. The position at which the pushing-up force acts on the heavy load 10 is adjusted so that the span of action of the pushing-up force is narrower than the range R described above, that is, so that it is in the range R' from a position C1' inside the widthwise center position C1 of one of the trolleys D1 (towards the center of gravity of the heavy load 10) to a position C2' inside the widthwise center position C2 of the other trolley D2 (towards the center of gravity of the heavy load 10), as shown in Figure 3(b).

[0022] Here, the positions of the hydraulic jacks that supplied hydraulic oil and the hydraulic jacks that cut off the supply of hydraulic oil for each of the bogies D1 and D2 will be described with reference to FIGS. Hydraulic oil is supplied to all of the hydraulic jacks corresponding to the multiple axles 14 located on the inner side in the width direction (the side of the center of gravity of the heavy load 10) of the parallel-arranged dollies D1 and D2. As a result, all of the hydraulic jacks contribute to pushing up (jacking up) the loading platform 12. Meanwhile, for the hydraulic jacks corresponding to the multiple axles 14 located on both outer sides in the width direction of the carts D1 and D2 arranged in parallel (on the opposite side from the center of gravity of the heavy load 10), the supply of hydraulic oil to some of the hydraulic jacks is cut off. Specifically, the supply of hydraulic oil to the first, third, and sixth hydraulic jacks counting from the hydraulic source 11 side is cut off. As a result, the first, third, and sixth axles 14 are lifted, as shown in Figures 1 and 2. In other words, the first, third, and sixth hydraulic jacks do not contribute to pushing up the loading platform 12, and the second, fourth, and fifth hydraulic jacks other than the above-mentioned hydraulic jacks contribute to pushing up the loading platform 12.

[0023] As described above, by cutting off the supply of hydraulic oil to some of the hydraulic jacks, the lifting force on the heavy object 10 by the hydraulic jacks whose supply of hydraulic oil has been cut off can be neutralized, and as shown in Figure 3(b), the effective span of the lifting force can be narrowed from the range R to the range R'. Therefore, by adjusting the position at which the lifting force acts on the heavy load 10, it is possible to alleviate the bending moment generated in the loading platform 12. The lifting force acting on the heavy load 10 can be calculated in advance and adjusted while checking the actual pressure applied to each hydraulic jack. It is preferable to place a buffer material such as a wooden board or a metallic support material between the heavy load 10 and the loading platform 12 of the dolly D1, D2 in advance.

[0024] After adjusting the position where the lifting force acts on the heavy load 10 in this way, the heavy load 10 placed on the loading platforms 12 of the dollies D1 and D2 is transported to the destination. This allows the optimum transport conditions to be selected for various types of heavy objects, and the heavy objects can be transported stably while maintaining their quality.

[0025] Next, a method for transporting a heavy object according to a second embodiment of the present invention will be described with reference to Figures 4 and 5. Note that the method for transporting a heavy object according to this embodiment is a method for transporting a heavy object 20 using the above-mentioned dollies D1 and D2, so differences will be described in detail.

[0026] The heavy object 20 to be transported comprises a heavy object main body 21, a plurality of pillars 22 arranged upright at intervals to support the heavy object main body 21, and horizontal members 23 that connect the pillars 22 together; for example, it is various types of plant equipment or components that constitute the same, and may be pre-manufactured or may be constructed by attaching various components before transportation. In this embodiment, when the heavy load 20 is viewed in a plane, the multiple pillars 22 are each located at the center of each vertex and side of the polygonal shape, and adjacent pillars 22 in the circumferential direction of the heavy load 20 are connected by horizontal members 23. However, depending on the configuration of the heavy load, for example, the horizontal members may connect multiple pillars every other pillar, or may connect pillars that face each other in a plane view.

[0027] A portion of this horizontal member 23 is supported and pushed up by the carriages D1 and D2, and is attached to each support column 22 in a horizontal state. It is preferable that the horizontal member 23 supported and pushed up by the carts D1 and D2 is one in which the pushing-up force of the carts D1 and D2 acts on all of the support columns 22. This allows the heavy load 20 to be transported while the heavy load main body 21 remains supported by the support columns 22 (a state in which the heavy load 20 is installed). It is preferable that the horizontal members 23 supported and pushed up by the carts D1 and D2 are all at the same height relative to the ground G, but they may be at different heights, and if they are at different heights, they are supported by the carts D1 and D2 via height adjustment members, etc. When pushing up the horizontal members, reinforcing members can be attached to the existing horizontal members to increase their strength against the pushing-up force.

[0028] First, as shown in Fig. 4, with the loading platforms 12 of the bogies D1 and D2 lowered, the two bogies D1 and D2 pass between adjacent support pillars 22 and enter below the heavy load 20. The positions at which the bogies D1 and D2 enter below the heavy load 20 can be determined based on, for example, the number of support pillars and the spacing between adjacent support pillars. The two bogies D1 and D2 are arranged parallel to each other in a plan view, with the support pillar 22 located at the center of the width of the heavy load 20 as the center, and the center of gravity of the heavy load 20 is located between the adjacent bogies D1 and D2. Furthermore, the hydraulic source 11 sides of the two bogies D1 and D2 face in the same direction, but they may face in opposite directions.

[0029] In the above-described state, if hydraulic oil is supplied to all the hydraulic jacks to raise the loading platform 12, the span of action of the lifting force will be from the widthwise center position C1 of one of the trolleys D1 to the widthwise center position C2 of the other trolley D2 (see Figure 3), which will not be the optimal transport condition for the heavy load 20, and a large lifting force will act on some of the pillars 22, which may damage the heavy load 20; specifically, the pillars 22 may come off the heavy load main body 21, or the horizontal members 23 may come off the pillars 22.

[0030] Therefore, by cutting off the supply of hydraulic oil to some of the hydraulic jacks and lifting some of the axles 14, it is possible to disable the lifting force of these hydraulic jacks on the heavy load 20, and it becomes possible to adjust the position at which the lifting force acts on the heavy load 20, as in the first embodiment (see FIGS. 1 and 2). After adjusting the position at which the lifting force acts on the heavy load 20 in this way, the heavy load 20 placed on the loading platforms 12 of the dollies D1 and D2 is transported to the destination. This allows the heavy object 20 to be transported without directly supporting (directly contacting) the heavy object main body 21, while maintaining the state in which the heavy object main body 21 is supported by the multiple support columns 22. Therefore, for example, the heavy object 20 can be transported efficiently with good workability without performing a strength analysis of the heavy object main body 21 and without impairing the quality of the heavy object main body 21. In addition, by adjusting the position at which the upward pushing force acts on each horizontal member 23 and applying the same upward pushing force to each support 22, the heavy object 20 can be transported with the heavy object main body 21 stably supported by the carts D1 and D2.

[0031] As described above, in the method for transporting heavy objects of the present invention, when a heavy object (horizontal member) is pushed up by the platform of a self-propelled multi-axle transport cart, the supply of hydraulic oil to some of the platform lifting actuators among multiple platform lifting actuators is cut off and some of the multiple axles are lifted, thereby partially neutralizing the pushing force on the heavy object (horizontal member) and making it possible to adjust the position at which the pushing force acts on the heavy object (horizontal member).This means that even for various types of heavy objects, the optimal transport conditions suitable for the heavy object can be selected, and the heavy object can be transported stably while maintaining its quality.

[0032] Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the configurations described in the above embodiments and includes other embodiments and modifications that are conceivable within the scope of the claims. For example, a method for transporting heavy objects of the present invention that combines some or all of the above embodiments and modifications is also within the scope of the present invention. [Explanation of symbols]

[0033] 10: heavy load, 11: hydraulic power source, 12: loading platform, 13: self-propelled carriage, 14: axle, 14a: wheel, 15: link mechanism, 20: heavy load, 21: heavy load body, 22: support, 23: horizontal member

Claims

1. A method for transporting a heavy object, comprising: moving a self-propelled multi-axle transport vehicle having a platform and a plurality of axles under a heavy object; supplying hydraulic oil to a plurality of platform lifting actuators respectively provided between the platform and each axle to lift the platform; and pushing up the heavy object and placing it on the platform for transport; A method for transporting heavy objects, characterized in that when the heavy object is pushed up by the loading platform of the self-propelled multi-axle transport cart, the supply of hydraulic oil to some of the loading platform lifting actuators is cut off, and some of the axles are lifted.

2. A method for transporting a heavy object, the method comprising: a heavy object comprising a main body of the heavy object, a plurality of support columns arranged upright at intervals to support the main body of the heavy object, and a horizontal member connecting the support columns; a self-propelled multi-axle transport vehicle having a platform and a plurality of axles is advanced below the horizontal member; thereafter, hydraulic oil is supplied to a plurality of platform lifting actuators respectively provided between the platform and each axle to lift the platform; the horizontal member is pushed up, and the object is placed on the platform for transport; A method for transporting heavy objects, characterized in that when the horizontal member is pushed up by the platform of the self-propelled multi-axle transport cart, the supply of hydraulic oil to some of the platform lifting actuators is cut off, and some of the axles are lifted.

3. 3. A method for transporting a heavy object according to claim 2, wherein the position at which the upward force acts on said horizontal member is adjusted so that the same upward force acts on each of said support columns.

Images