Transport vehicle

Abstract

To provide a transport vehicle capable of reducing a load on a long object as a cargo.SOLUTION: The transport vehicle 1 transports the crane jib 23. A transport vehicle 1 includes a connecting part 4 to which a base end part side 23A of a crane jib 23 is connected, an erecting part 5 for erecting the crane jib 23 connected to the connecting part 4, and a weight placing part 9 for placing a counterweight 10. The weight placement part 9 is positioned closer to the 23B side of the tip part of the crane jib 23 than the connecting part 4. The raising portion 5 raises the crane jib 23 by operating a raising rope 6 attached to a side 23B of a tip end portion of the crane jib 23.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a transport vehicle for transporting long objects such as a crane jib. [Background technology]

[0002] Large cranes such as crawler cranes and tower cranes are used in the construction of wind power generation facilities. These large cranes are transported to the construction site and then assembled. After the construction work is completed, the cranes are disassembled and transported to the next construction site, where they are reassembled.

[0003] Assembling and dismantling a large crane takes approximately one to two weeks. Therefore, in order to shorten the time required for assembling and dismantling a crane, it has been considered to transport the jib, which is made up of multiple connected components, to the next site without dismantling it. For example, Patent Document 1 discloses a transport vehicle for transporting irregularly shaped, long objects such as wind power generation equipment blades. The transport vehicle in Patent Document 1 has a function that allows the platform on which the irregularly shaped, long object is placed to stand up or rotate while traveling in order to prevent the irregularly shaped, long object from interfering with travel. If such a transport vehicle could transport the jib to the next site without dismantling it, it would be possible to shorten the time required for assembling and dismantling a crane. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-189501 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of the transport vehicle described in Patent Document 1, the long object to be transported is supported at only one end in a cantilevered state, which means that a greater load is applied to the long object than when the object is supported at both ends. [Means for solving the problem]

[0006] The transport vehicle that solves the above problem is a transport vehicle for transporting long objects, and is equipped with a connection portion to which the base end of the long object is connected, an erection portion connected to the connection portion and used to erect the long object, and a weight mounting portion for placing a counterweight, wherein the weight mounting portion is located closer to the tip end of the long object than the connection portion, and the erection portion erects the long object by operating a wire rope attached to the tip end of the long object. [Effects of the Invention]

[0007] According to the present invention, the load on long cargo items can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a side view of a transport vehicle on which a crane jib is loaded. [Figure 2] FIG. 2 is an enlarged side view of a transport vehicle on which a crane jib is loaded. [Figure 3] FIG. 3 is a side view of the crane with the crane jib attached. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of a transport vehicle will be described below with reference to Figures 1 to 3. In this embodiment, it is assumed that a long object made up of a plurality of connected parts is transported in its long state by the transport vehicle.

[0010] (Configuration of transport vehicle 1) As shown in Fig. 1, the transport vehicle 1 is a self-propelled vehicle for transporting long objects as cargo. The transport vehicle 1 includes a cabin 2 and a loading section 3. The cabin 2 includes a driver's seat for an operator to operate the transport vehicle 1. In the following, the front-rear direction, left-right direction, and up-down direction as seen from the operator seated in the driver's seat will be referred to as the front-rear direction, left-right direction, and up-down direction of the transport vehicle 1.

[0011] The loading section 3 is located behind the cabin 2. A crane jib 23 is loaded onto the loading section 3 as cargo for the transport vehicle 1. The crane jib 23 is an example of a long object transported by the transport vehicle 1. The crane jib 23 is loaded onto the transport vehicle 1 in a state where it is detached from a crane 20 (see Figure 3) described below. The crane jib 23 is formed by connecting multiple members having a truss structure in the longitudinal direction. The transport vehicle 1 transports the crane jib 23 with the multiple members that make up the crane jib 23 still connected together.

[0012] The crane jib 23 is loaded on the loading section 3 with its longitudinal direction aligned with the front-to-rear direction of the transport vehicle 1. A base end 23A of the crane jib 23 is attached to the loading section 3. A tip end 23B of the crane jib 23 is located forward of the cabin 2.

[0013] The length of crane jib 23 is, for example, 40 m or more and 70 m or less. The weight of crane jib 23 is, for example, 20 t or more and 30 t or less. When transporting crane jib 23 of the above length and weight, loading section 3 is configured, for example, to have a length in the front-to-rear direction of 10 m or more and 20 m or less and a width in the left-to-right direction of 3.0 m or more and 3.5 m or less.

[0014] The loading section 3 includes a connection section 4. A base end section 23A of the crane jib 23 is connected to the connection section 4. The connection section 4 rotatably supports the crane jib 23 at the joint with the base end section 23A, using an axis extending in the left-right direction as a rotation axis.

[0015] The loading section 3 includes an erecting section 5. The erecting section 5 erects the crane jib 23 connected to the connection section 4. By erecting the long crane jib 23, it is possible to reduce the length that the crane jib 23 occupies in the fore-and-aft direction of the transporter vehicle 1. Therefore, when the transporter vehicle 1 is traveling, by having the erecting section 5 erect the crane jib 23 connected to the connection section 4, it is possible to prevent the crane jib 23 from interfering with the traveling.

[0016] The erection section 5 includes an erection rope 6, a turn-back section 7, and a winch 8. The erection rope 6 is a wire rope. The erection rope 6 is led out from the winch 8, passes through the turn-back section 7, and is attached to a rope attachment section 23C provided at the tip section 23B of the crane jib 23.

[0017] The turn-back portion 7 is located rearward of the connection portion 4 and the winch 8. As an example, the winch 8 is located rearward of the connection portion 4. The erection rope 6 is led rearward from the winch 8 and is attached to the tip portion 23B in a state where it is turned back forward at the turn-back portion 7. Hereinafter, the position where the erection rope 6 is turned back at the turn-back portion 7 is referred to as the turn-back position.

[0018] At the erection section 5, the winch 8 either winds up or unwinds the erection rope 6, thereby raising or lowering the crane jib 23. For example, at the erection section 5, the winch 8 winds up the erection rope 6, thereby raising the tip end 23B of the crane jib 23. This causes the crane jib 23 to erect with the connection section 4 as a fulcrum. For example, at the erection section 5, the winch 8 unwinds the erection rope 6, thereby lowering the tip end 23B of the crane jib 23. This causes the crane jib 23 to collapse with the connection section 4 as a fulcrum.

[0019] The maximum angle at which the crane jib 23 can be raised or lowered by operating the erector 5 is, for example, less than 90 degrees. The raising or lowering angle is the angle between the longitudinal direction of the crane jib 23 and a plane including the front-rear and left-right directions of the transporter vehicle 1.

[0020] The loading section 3 includes a weight placing section 9. The weight placing section 9 is located forward of the connection section 4, i.e., closer to the tip section 23B of the crane jib 23 than the connection section 4. A counterweight 10 is placed on the weight placing section 9. The weight of the counterweight 10 is adjusted appropriately depending on the length, weight, and other dimensions of the crane jib 23 and the angle at which the crane jib 23 can be raised or lowered. For example, when the crane jib 23 has a length and weight within the above ranges, the weight of the counterweight 10 is 10 tons or more and 80 tons or less.

[0021] 2, in the up-down direction, the height H1 from the connection between the connection part 4 and the base end 23A of the crane jib 23 to the turn-back position is, for example, 1 m or more and 10 m or less. In addition, in the front-rear direction, the distance D1 from the connection between the connection part 4 and the base end 23A of the crane jib 23 to the turn-back position is, for example, 5 m or more and 10 m or less. By locating the turn-back position of the turn-back part 7 in such a position, the erection rope 6 can be suitably wound and unwound by the winch 8.

[0022] (Configuration of Crane 20) 3, the crane 20 will be described before the crane jib 23 is removed. Note that the crane 20 is, for example, a crawler crane.

[0023] The crane 20 comprises a base 21, a crane boom 22, and the above-mentioned crane jib 23. The base 21 comprises a driver's seat where an operator sits, and a crawler (crawler) type traveling device. The crane boom 22 is formed by connecting a plurality of members having a truss structure in the longitudinal direction. The crane boom 22 comprises a base end 22A connected to the base 21, and a tip end 22B to which a base end 23A of the crane jib 23 is connected. A hoisting hook 24 is suspended from the tip end 23B of the crane jib 23. When the crane jib 23 is transported by the transport vehicle 1, the hoisting hook 24 is detached from the crane jib 23.

[0024] The crane boom 22 is the main jib of the crane 20. The crane jib 23 is the auxiliary jib of the crane 20. In other words, the crane boom 22 and the crane jib 23 are each an example of a jib provided on the crane 20. Therefore, the long object transported by the transport vehicle 1 may be the crane boom 22 detached from the crane 20.

[0025] Base end 22A of crane boom 22 is configured to be pivotally supported by a pin or the like relative to base 21. The portion of base 21 that pivotally supports base end 22A of crane boom 22 is an example of a pivotal support portion included in crane 20.

[0026] Tip end 22B of crane boom 22 is configured to pivotally support base end 23A of crane jib 23. In other words, base end 23A of crane jib 23 is configured to be pivotally supported relative to tip end 22B of crane boom 22. Tip end 22B of crane boom 22 is an example of a pivotal support portion provided in crane 20. Connection portion 4 of transport vehicle 1 described above pivotally supports a portion of base end 23A of crane jib 23 that is pivotally supported by tip end 22B of crane boom 22 in crane 20.

[0027] For example, the tip end 22B of the crane boom 22 and the base end 23A of the crane jib 23 are connected to each other by a pin or the like. The tip end 22B of the crane boom 22 and the base end 23A of the crane jib 23 each have an insertion hole for inserting the pin. Note that the mechanism using the pin and insertion hole described above can also be used for the attachment structure of the base end 22A of the crane boom 22 to the base 21.

[0028] The crane 20 is equipped with a first hoisting rope 25 and a second hoisting rope 26. Both the first hoisting rope 25 and the second hoisting rope 26 are wire ropes. The first hoisting rope 25 is attached to a rope attachment point 22C provided on the tip 22B of the crane boom 22. The second hoisting rope 26 is attached to a rope attachment point 23C provided on the tip 23B of the crane jib 23. In the transport vehicle 1 described above, the raising rope 6 is attached to the rope attachment point 23C of the crane jib 23, which is the part of the crane 20 where the second hoisting rope 26 is attached.

[0029] The crane 20 includes a counterweight 27. In FIG. 3, if the direction in which the crane jib 23 extends from the crane boom 22 is defined as the front, the counterweight 27 is disposed rearward of the base 21 and the crane boom 22.

[0030] (Effects of the embodiment) (1) In a conventional method for transporting the crane 20, the crane 20 is first disassembled. At this time, the long crane boom 22 and crane jib 23 must be laid on their side, and the components connected in the longitudinal direction must be disassembled. Furthermore, after transportation, the disassembled crane jib 23 must be reassembled. In this regard, in the present embodiment, the transport vehicle 1 is used to transport the crane jib 23 with the components that make up the crane jib 23 still connected, thereby reducing the time required to disassemble and assemble the crane jib 23.

[0031] (2) A large yard (workplace) was required to dismantle the long crane boom 22 and crane jib 23. Furthermore, a similarly large yard was required to reassemble the crane 20 at the next site after transport. On the other hand, because onshore wind power plants constructed using the crane 20 are often built in forested areas, it is difficult to expand the yard to assemble and dismantle temporary machinery such as the crane 20 from an environmental protection perspective. In this regard, in the present embodiment, the transport vehicle 1 is used to transport the long crane boom 22 and crane jib 23 without dismantling them, thereby reducing the yard required for assembling and dismantling the crane 20.

[0032] (3) In the transport vehicle 1, the base end 23A of the crane jib 23, which serves as a load, is pivotally supported by the connection part 4. In addition, in the transport vehicle 1, the raising rope 6 is attached to the tip end 23B of the crane jib 23, and the crane jib 23 is raised by operating the raising rope 6. Therefore, the crane jib 23 loaded on the transport vehicle 1 is raised with both the base end 23A and the tip end 23B of the crane jib 23 supported. This reduces the load on the crane jib 23 compared to when the crane jib 23 is raised with only the base end 23A of the crane jib 23 supported.

[0033] (4) In the crane 20, the crane jib 23 is raised and lowered by operating the second hoisting rope 26 attached to the tip 23B. That is, the crane jib 23 is designed on the premise that it will be raised and lowered by the wire rope attached to the tip 23B with the base end 23A pivotally supported, so that it can withstand use as the crane 20. Therefore, with a configuration in which the crane jib 23 is raised by operating the raising rope 6 attached to the tip 23B of the crane jib 23, as in this embodiment, it is possible to prevent a load exceeding the design allowable value from being applied to the crane jib 23.

[0034] (5) In the transport vehicle 1, the weight placement portion 9 is located forward of the connection portion 4, i.e., closer to the tip portion 23B of the crane jib 23 than the connection portion 4. This prevents the center of gravity of the transport vehicle 1 from being excessively shifted rearward due to the weight of the crane jib 23.

[0035] (6) The connection part 4 of the transport vehicle 1 pivotally supports the portion of the base end part 23A of the crane jib 23 that is pivotally supported by the tip end part 22B of the crane boom 22 in the crane 20. In other words, the configuration in which the crane jib 23 is pivotally supported in the crane 20 can be utilized as a configuration in which the connection part 4 pivotally supports the crane jib 23 in the transport vehicle 1. Therefore, the connection structure between the connection part 4 and the base end part 23A of the crane jib 23 can be simplified.

[0036] (7) In the transport vehicle 1, the raising rope 6 is attached to the rope attachment portion 23C of the crane jib 23, which is the portion to which the second raising rope 26 is attached in the crane 20. In other words, the rope attachment portion 23C, which is configured to attach the second raising rope 26 to the tip end 23B of the crane jib 23 in the crane 20, can be used to attach the raising rope 6 in the transport vehicle 1. Therefore, the attachment structure of the raising rope 6 to the tip end 23B of the crane jib 23 can be simplified.

[0037] (Example of change) This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0038] The long object to be loaded onto the transport vehicle 1 is not limited to the jib of the crane 20, such as the crane boom 22 or the crane jib 23. The long object may be any long object made up of multiple connected members, or any long object on its own.

[0039] The raising rope 6 of the transport vehicle 1 may be the second raising rope 26 attached to the crane jib 23 of the crane 20, or a wire rope separate from the second raising rope 26 may be used.

[0040] The transporter vehicle 1 may be made up of multiple vehicle bodies. For example, the transporter vehicle 1 may be configured so that the cabin 2 and the loading section 3 are not integrated, but can be connected and separated from each other. Furthermore, the loading section 3 may be configured so that the weight placement section 9, the connection section 4, and the standing section 5 are not integrated, but can be connected and separated from each other.

[0041] The erection rope 6 of the transport vehicle 1 may be attached to a portion of the tip 23B of the crane jib 23 other than the rope attachment portion 23C. At the base end 23A of the crane jib 23, the portion pivotally supported on the tip end 22B of the crane boom 22 of the crane 20 and the portion pivotally supported on the connection part 4 of the transport vehicle 1 may be different from each other. In other words, the base end 23A of the crane jib 23 may have a portion pivotally supported on the tip end 22B of the crane boom 22 of the crane 20 and a portion pivotally supported on the connection part 4 of the transport vehicle 1, respectively.

[0042] In the loading section 3, the winch 8 may be located forward of the connection section 4. In this case, the weight of the winch 8 also contributes to stabilizing the posture of the transport vehicle 1, just like the counterweight 10. Therefore, the weight of the counterweight 10 placed on the weight placement section 9 can be reduced.

[0043] (Addendum) The technical concepts that can be understood from the above-described embodiments and modifications will be described below. (Appendix 1) A transport vehicle for transporting a jib removed from a crane, A connection portion to which the base end portion of the jib is connected; A raising portion connected to the connection portion for raising the jib; a weight placement portion for placing a counterweight thereon, The jib is configured by connecting a plurality of members in the longitudinal direction, The weight placement portion is located closer to the tip end of the jib than the connection portion, The erecting unit erects the elongated object by operating a wire rope attached to the tip of the jib, The connection portion pivotally supports a portion of the base end portion of the jib that is pivotally supported by a pivot support portion provided on the crane. Transport vehicle.

[0044] (Appendix 2) The tip of the jib is provided with a rope attachment portion configured to attach a hoisting rope provided in the crane, The erecting portion operates the wire rope attached to the rope attachment portion. A transport vehicle as described in Appendix 1. [Explanation of symbols]

[0045] D1...distance, H1...height, 1...transport vehicle, 2...cabin, 3...loading section, 4...connection section, 5...erecting section, 6...erecting rope, 7...folding section, 8...winch, 9...weight mounting section, 10, 27...counterweight, 20...crane, 21...base, 22...crane boom, 22A, 23A...base end, 22B, 23B...tip end, 22C, 23C...rope attachment section, 23...crane jib, 24...hook, 25...first erecting rope, 26...second erecting rope.

Claims

1. A transport vehicle for transporting long objects, a connection portion to which a base end portion of the elongated object is connected; a standing portion that stands the elongated object connected to the connecting portion; a weight placement portion for placing a counterweight thereon, the weight placement portion is located closer to the tip end of the elongated object than the connection portion, The erecting unit erects the elongated object by operating a wire rope attached to the tip end of the elongated object. Transport vehicle.

2. the long object is a jib detached from a crane, The base end of the jib is configured to be pivotally supported on a pivot support provided on the crane, The tip of the jib is configured to allow a hoisting rope provided on the crane to be attached. The transport vehicle of claim 1 .

3. The jib is formed by connecting a plurality of members in the longitudinal direction. The transport vehicle according to claim 2.

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