Gib crane unit

Abstract

To provide a gib crane unit capable of suppressing vertical enlargement by reducing the vertical length (height) of the entire gib crane unit.SOLUTION: A gib crane unit 100 is configured to move a trolley 4 to a tip side opposite to a support pillar 1 side in the extending direction of a gib 2 when a cylinder 6 pulls a connection wire 7 in a state where the cylinder 6 contracts, and move the trolley to the support pillar 1 side while pulling the connection wire 7 via a first pulley 41 when the dead weight of an object 50 to be suspended is applied on a suspension wire 3 in a state where the cylinder 6 expands.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a jib crane unit. [Background technology]

[0002] 2. Description of the Related Art A jib crane unit is known in the art (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 discloses a jib crane unit including a revolving frame, a jib, a gantry (support part) that attaches the jib to the revolving frame and extends in the vertical direction, a trolley (horizontal movement mechanism) that can move the jib in the horizontal direction, and a hook suspended from the trolley. In Patent Document 1, the revolving frame is configured to revolve the jib. The revolving frame is also provided with a hoisting winch for hoisting the trolley, a traverse winch for moving the trolley in the horizontal direction, and a sheave (pulley) arranged above the gantry. The hoisting winch and the traverse winch are connected to the trolley via the sheave. The hoisting winch winds up the wire, causing the trolley provided at the tip of the wire to move in the vertical direction. The traverse winch winds up the wire, causing the trolley to move in the lateral direction. In Patent Document 1, the gantry extends above the jib. In addition, the traverse winch and the winding winch are disposed above the jib, and the multiple sheaves are disposed above the traverse winch and the winding winch. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-286591 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the jib crane unit described in Patent Document 1 above, a gantry (support portion) extends vertically from the jib, and a traverse winch and sheave for moving the trolley horizontally are positioned above the gantry, which creates the problem that the vertical length (height) of the jib crane unit becomes large.

[0006] This invention has been made to solve the above-mentioned problems, and one object of the invention is to provide a jib crane unit that can reduce the vertical length (height) of the entire jib crane unit, thereby preventing the vertical size from increasing. [Means for solving the problem]

[0007] In order to achieve the above object, a jib crane unit in one aspect of the present invention comprises a rotatable support column extending in a vertical direction, a jib formed in an elongated shape extending in a horizontal direction and fixed to the upper end of the support column, the jib serving as a guide when moving a suspended object in a horizontal direction, a suspension wire for suspending the suspended object, a trolley that is attached to the jib, moves along the horizontal direction in which the jib extends, and includes a first pulley that supports the suspension wire, and a horizontal movement mechanism for moving the suspended object suspended by the suspension wire in a horizontal direction, the trolley being disposed closer to the support column than the trolley and winding up the suspension wire or The device is equipped with a vertical movement mechanism that moves the suspension wire vertically by feeding out the suspension wire, a cylinder that is attached to the jib so as to extend along the horizontal direction and expands and contracts along the horizontal direction, and a connecting wire connected to the trolley and the cylinder.When the cylinder is contracted, the cylinder is configured to pull the connecting wire, causing the trolley to move to the tip side opposite the support section in the direction in which the jib extends, and when the cylinder is extended, the weight of the object to be suspended is applied to the suspension wire, causing the trolley to move toward the support section while pulling the connecting wire via the first pulley.

[0008] In one aspect of the present invention, the jib crane unit includes a jib that is elongated and extends horizontally, fixed to the upper end of the support, and serves as a guide when moving the suspended object horizontally. As a result, the support does not extend above the jib, and the vertical length (height) of the entire jib crane unit can be prevented from increasing. The jib also includes a cylinder that is attached to the jib so as to extend horizontally and expands and contracts horizontally, and a connecting wire that is connected to the trolley and the cylinder. When the cylinder is extended, the weight of the suspended object is applied to the hanging wire, and the trolley moves toward the support while pulling the connecting wire via the first pulley. As a result, the cylinder for moving the trolley horizontally is attached to extend horizontally, and unlike the case where the traverse winch for moving the trolley horizontally and the sheave that is arranged above the traverse winch are arranged above the jib, the vertical length (height) of the entire jib crane unit can be prevented from increasing. As a result, the vertical length (height) of the entire jib crane unit can be reduced, preventing it from becoming too large in the vertical direction.

[0009] In the jib crane unit according to the above aspect, preferably, the cylinder is arranged to extend horizontally on the upper surface side of the jib, the jib includes a second pulley arranged near the end on the tip side, and the connecting wire is configured to connect the cylinder and the trolley via the second pulley. With this configuration, by arranging the cylinder horizontally on the upper surface side of the jib, it is possible to prevent the horizontal length from increasing compared to the case where the cylinder is arranged to extend horizontally from the end on the tip side of the jib. In addition, since the second pulley is arranged at the end on the tip side of the jib, it is possible to further reduce the vertical length of the entire jib crane unit compared to the case where a pulley for moving the trolley horizontally is provided above the jib. This makes it possible to prevent the jib crane unit from becoming large in the horizontal and vertical directions.

[0010] In the jib crane unit according to the above aspect, preferably, the vertical movement mechanism includes a winch arranged on the support column. With this configuration, since the winch is arranged on the support column, the vertical length can be prevented from increasing compared to the case where the winch is arranged on the jib. Furthermore, when the suspended object is arranged deep underground, the suspension wire needs to be long, and therefore the winch needs to be made larger in size in accordance with the length of the suspension wire. This increases the weight of the winch. In this case, by arranging the winch on the support column, the weight of the jib can be prevented from increasing, unlike the case where the winch is arranged on the jib, and the load on the portion connected to the support column of the jib can be reduced.

[0011] In the jib crane unit according to the above aspect, preferably, the jib crane unit further includes a power supply source that supplies power to the vertical movement mechanism, and the cylinder includes an electric cylinder that expands and contracts with power supplied from the power supply source. With this configuration, by using the power supply source of the vertical movement mechanism as the power source of the electric cylinder, unlike the case where another cylinder such as a hydraulic cylinder is used, there is no need to provide a separate power source, so that it is possible to suppress an increase in the number of parts and to suppress an increase in the complexity of the device configuration.

[0012] In the jib crane unit according to the above aspect, the hoisting wire is preferably configured to suspend a submersible pump as a hoisting object that is disposed underground or in a river at a predetermined depth and that discharges groundwater or river water accumulated underground. With this configuration, the submersible pump can be disposed underground or in a river at a predetermined depth using the jib crane unit and the water can be discharged.

[0013] In the jib crane unit according to the above aspect, the support section is preferably configured to be mounted on a vehicle including a bed, and the sum of the vertical length of the bed of the vehicle and the vertical length of the support section is configured to be the size of the hanging allowance. With this configuration, the jib crane unit can be easily transported to any position by mounting it on a vehicle. Furthermore, since the sum of the vertical length of the bed of the vehicle and the vertical length of the support section is configured to be the size of the hanging allowance, the vertical length of the support section can be reduced by the vertical length of the bed of the vehicle compared to when the jib crane unit is not mounted on a vehicle. As a result, the vertical length (height) of the jib crane unit can be prevented from increasing. Effect of the Invention

[0014] According to the present invention, as described above, it is possible to provide a jib crane unit that can reduce the vertical length of the entire jib crane unit, thereby preventing an increase in vertical size. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 illustrates a jib crane unit according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 13 is a diagram showing a state in which the trolley is positioned at the tip side. [Figure 4] FIG. 13 is a diagram showing a state in which the cylinder is extended while the object to be suspended is suspended. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment will be described with reference to the drawings.

[0017] (Embodiment) (Jib crane unit configuration) A jib crane unit 100 of an embodiment will be described with reference to Figs. 1 to 4.

[0018] The jib crane unit 100 shown in FIG. 1 is used to move a suspended object 50 in the vertical direction. The suspended object 50 is, for example, a submersible pump. The submersible pump is placed underground or in a river at a predetermined depth. The predetermined depth is, for example, a depth of 10 m or more, and, for example, a depth of 20 m to 40 m. The underground is, for example, a well. The submersible pump is configured to pump groundwater or river water to the outside.

[0019] Jib crane unit 100 is mounted on vehicle 200. Vehicle 200 is, as an example, a truck having a loading platform 210. In addition to a pump which is a suspended object 50, vehicle 200 may also be equipped with a hose, an elbow pipe, a generator, or the like which are used together with the pump.

[0020] Jib crane unit 100 of this embodiment includes a support column 1, a jib 2, a hoisting wire 3, a trolley 4, a vertical movement mechanism 5, a cylinder 6, and a connection wire 7. Jib crane unit 100 is configured so that the sum of height (vertical length) h1 of platform 210 of vehicle 200 and height (vertical length) h2 of support column 1 constitutes the size of the hoisting allowance. The hoisting allowance is the height (vertical length) required when suspending object 50 to be suspended by hoisting wire 3.

[0021] The support column 1 extends along the vertical direction. The support column 1 is formed to have a constant height. The support column 1 can rotate horizontally around a vertically extending axis as a rotation axis. The support column 1 includes a base 1a that supports the entire jib crane unit 100. The base 1a is connected to a rotation mechanism (not shown), and the support column 1 rotates when the base 1a rotates by the rotation mechanism. The rotation angle of the support column 1 is not particularly limited, but may be 360 ​​degrees as an example, or may be limited to 180 degrees or less as another example. The support column 1 is configured such that the horizontal length is greater on the upper side than on the lower side. A vertical movement mechanism 5 is disposed on the support column 1.

[0022] As shown in Fig. 1, the jib 2 is formed in an elongated shape extending along the horizontal direction. In the specification and drawings, in the extension direction of the jib 2, the support column 1 side is represented by X1, and the tip side opposite the support column 1 side is represented by X2. The vertical direction is represented by Z, with the upper side being the Z1 side and the lower side being the Z2 side. The direction perpendicular to the vertical direction and the extension direction of the jib 2 is represented by the Y direction.

[0023] The jib 2 is a guide for moving the trolley 4 (suspended object 50) in the horizontal direction. The jib 2 is fixed to the upper end of the support column 1. In this embodiment, an example is shown in which the end of the jib 2 on the support column 1 side is fixed to the upper end of the support column 1, but the portion on the X2 side from the end of the support column 1 side may be fixed. The support column 1 and the jib 2 are fixed to each other in a state of forming an approximately right angle. A triangular reinforcing rib R is provided at the angular position of the approximately right angle between the support column 1 and the jib 2. The jib 2 is, as an example, made of H-beam. The support column 1 and the jib 2 form an L-shape. The jib 2 rotates with the rotation of the support column 1. The horizontal length of the jib 2 is formed to be constant. The horizontal length, which is the longitudinal direction of the jib 2, is greater than the vertical length, which is the longitudinal direction of the support column 1.

[0024] As shown in FIG. 2, the jib 2 made of the H-beam of this embodiment is fixed to the upper end of the support part 1 horizontally so as to be I-shaped when viewed from the X direction. The jib 2 is also made of a pair of first flat plate parts 21 and one second flat plate part 22 connecting the pair of first flat plate parts 21. The first flat plate part 21 is a plate-like member having a thickness in the Z direction, and the second flat plate part 22 is a plate-like member having a thickness in the Y direction. The pair of first flat plate parts 21 are arranged parallel to each other in the Z direction and both extend in the X direction. The second flat plate part 22 connects the pair of first flat plate parts 21 at their intermediate positions in the Y direction between the pair of first flat plate parts 21 and extends in the X direction. A cylinder 6 is arranged from above on the upper first flat plate part 21 of the pair of first flat plate parts 21. The cylinder 6 is also arranged biased toward the support part 1 side of the upper first flat plate part 21. Of the pair of first flat plate portions 21, the trolley 4 is disposed on the lower first flat plate portion 21.

[0025] The hoisting wire 3 is made of a wire rope. A hook 31 is provided at one end of the hoisting wire 3 (the X2 side of the trolley 4). The hoisting wire 3 is held by a first pulley 41 of the trolley 4. The other end of the hoisting wire 3 (the X1 side of the trolley 4) is fixed to a winch 51 of the vertical movement mechanism 5, and is stored in a wound state inside the vertical movement mechanism 5. The hoisting wire 3 is arranged to extend obliquely from the vertical movement mechanism 5 toward the first pulley 41 and to extend downward from the first pulley 41.

[0026] The suspending wire 3 is moved in the vertical direction by the vertical movement mechanism 5. As a result, the suspended object 50 suspended from the hook 31 moves in the vertical direction. The suspending wire 3 is also moved in the horizontal direction by the trolley 4. As a result, the suspended object 50 suspended from the hook 31 moves in the horizontal direction. The suspending wire 3 also rotates with the rotation of the support unit 1. As a result, the suspended object 50 suspended from the hook 31 rotates around the support unit 1 and moves in the horizontal direction. When the suspended object 50 is not suspended from the hook 31, the hook 31 is fixed to a hook (not shown) provided at the tip side (X2 side) of the jib 2. The length of the suspending wire 3 is greater than the predetermined depth of the underground or river where the suspended object 50 is placed.

[0027] The trolley 4 includes a main body 40, a first pulley 41, and wheels 42. The trolley 4 is attached to the jib 2. In this embodiment, as an example, the trolley 4 is attached below the jib 2. The trolley 4 moves along the horizontal direction (X direction) in which the jib 2 extends. The trolley 4 is a horizontal movement mechanism for moving the hook 31 of the suspension wire 3 in the direction in which the jib 2 extends (horizontal direction).

[0028] As shown in FIG. 2, two main bodies 40 are provided facing each other in the vertical direction and in the Y direction perpendicular to the extension direction of the jib 2. The main bodies 40 are hexagonal plate-shaped members. A connecting wire 7 is attached to the main body 40. Two connecting wires 7 are provided. The two connecting wires 7 extend parallel to the jib 2 and are disposed with the jib 2 in between. A first pulley 41 and a wheel 42 are provided between the pair of main bodies 40.

[0029] The first pulley 41 is disposed below the wheel 42. The first pulley 41 supports the hoisting wire 3. As a result, as the trolley 4 moves, the hoisting wire 3 moves along the extension direction of the jib 2. In addition, the hoisting wire 3 moves in the vertical direction while rotating the first pulley 41. The rotation shaft of the first pulley 41 is attached to the main body 40.

[0030] 1, the first pulley 41 is disposed on the tip side (X2 side) of the vertical movement mechanism 5 in the horizontal direction. Also, the first pulley 41 is disposed above the vertical movement mechanism 5 in the vertical direction. As a result, the suspension wire 3 is provided in a state inclined downward from the tip side toward the support part 1 side.

[0031] As shown in FIG. 2, two wheels 42 are arranged in the vertical direction, sandwiching the jib 2. In addition, two wheels 42 are arranged facing each other in the vertical direction and in a direction (Y direction) perpendicular to the extension direction of the jib 2. In addition, although not shown, a plurality of wheels 42 are provided along the extension direction of the jib 2. The rotation of the wheels 42 causes the trolley 4 to move along the jib 2. The trolley 4 moves in a direction opposite to the extension direction of the cylinder 6. The trolley 4 does not have a power source because it is moved by the cylinder 6. The wheels 42 have a rotating shaft attached to a connection plate 43 that connects the wheels arranged in the vertical direction, and the connection plate 43 is attached to the main body 40.

[0032] The vertical movement mechanism 5 is attached to the support column 1. The vertical movement mechanism 5 is located closer to the support column 1 (X1 side) than the trolley 4 (first pulley 41) and is located lower in the vertical direction. The vertical movement mechanism 5 moves the suspension wire 3 in the vertical direction to move the hook 31 in the vertical direction. The vertical movement mechanism 5 includes a winch 51, as an example. The end of the suspension wire 3 on the support column 1 side (X1 side) is fixed to the winch 51. The vertical movement mechanism 5 moves the suspension wire 3 in the vertical direction by winding up the suspension wire 3 with the winch 51 or by feeding out the suspension wire 3. Specifically, the suspension wire 3 fed out by the winch 51 moves downward via the first pulley 41. Furthermore, as the winch 51 winds up the suspension wire 3, the suspension wire 3 moves upward via the first pulley 41. The vertical movement mechanism 5 has a roller 52 for preventing irregular winding. The roller 52 for preventing irregular winding is configured to face the winch 51 in the vertical direction and to sandwich the suspension wire 3 together with the winch 51. The roller 52 for preventing irregular winding is a roller that extends in the Y direction. Note that the roller 52 for preventing irregular winding may be configured to move in the Y direction.

[0033] The cylinder 6 is attached to the jib 2 so as to extend along the horizontal direction. In this embodiment, the position where the cylinder 6 is attached is the upper surface side of the jib 2. The cylinder 6 is arranged so that the piston portion is located on the tip side (X2 side). The cylinder 6 is an electric cylinder. The drive motor 6a of the cylinder 6 is arranged at a position closer to the end of the jib 2 on the support section 1 side (X1 side) than the end of the jib 2 on the tip side (X2 side) in a plan view. In detail, the drive motor 6a of the cylinder 6 is arranged approximately directly above the support section 1. The power supply source 8 that drives the cylinder 6 is the same as the power supply source 8 that drives the vertical movement mechanism 5. The cylinder 6 expands and contracts along the horizontal direction, which is the direction in which the jib 2 extends. The cylinder 6 expands toward the tip side (X2 side) and contracts toward the support section 1 side (X1 side). The cylinder 6 is provided with wheels at the end of the tip side (X2 side) that can move along the jib 2. The extendable length of the cylinder 6 is the length by which the trolley 4 can move toward the support section 1. In this embodiment, it is half the horizontal length of the jib 2. In a plan view, the center position of the cylinder 6 in the Y direction, the center position of the jib 2 in the Y direction, and the center position of the trolley 4 in the Y direction are aligned.

[0034] The connecting wire 7 is made of a wire rope. The connecting wire 7 connects the trolley 4 and the cylinder 6 via the second pulley 9. Specifically, it connects the piston of the cylinder 6 and the main body 40 of the trolley 4. The position where the connecting wire 7 connects to the trolley 4 is a position above the first pulley 41. When the cylinder 6 contracts, the connecting wire 7 above the jib 2 moves to the support column 1 side (X1 side), but the connecting wire 7 below the jib 2 moves to the tip side (X2 side). This pulls the trolley 4 to the tip side (X2 side). When the cylinder 6 expands and the object 50 to be suspended is suspended from the hook 31, the connecting wire 7 on the upper side moves to the tip side, but the connecting wire 7 on the lower side moves to the support column 1 side (X1 side). This allows the trolley 4 to move to the support column 1 side (X1 side). The connecting wire 7 is not connected to the suspension wire 3. Two connecting wires 7 are provided facing each other in the Y direction. The two connecting wires 7 are connected to the trolley 4 and the cylinder 6, respectively.

[0035] The power supply source 8 is, for example, a gasoline engine type generator. The power supply source 8 is mounted on the vehicle 200. The power supply source 8 drives the vertical movement mechanism 5 and the cylinder 6. The power supply source 8 also drives the swivel mechanism. Although not shown, the vertical movement mechanism 5 and the cylinder 6 are driven by operating a remote control. The remote control has a one-way traverse button for extending the cylinder 6 to move the trolley 4 to the X1 side, a other-way traverse button for retracting the cylinder 6 to move the trolley 4 to the X2 side, an up button for winding the hoisting wire 3 with the winch 51 to raise the hook 31, and a down button for sending out the hoisting wire 3 with the winch 51 to lower the hook 31. The remote control is configured to drive the vertical movement mechanism 5 and the cylinder 6 while the button is being operated, and to stop the vertical movement mechanism 5 and the cylinder 6 when no operation is accepted. This allows the amount of movement to be adjusted.

[0036] The second pulley 9 is disposed near the end of the tip side (X2 side) of the jib 2. Two second pulleys 9 are provided facing each other in the Y direction. The rotation center axis of the second pulley 9 is disposed between the pair of first flat plate portions 21 in the vertical direction. The second pulley 9 is the same size as the first pulley 41. The rotation center axes of the first pulley 41, the second pulley 9, and the winch 51 are all axes parallel to the Y direction.

[0037] The movement of the trolley 4 accompanying the extension and contraction of the cylinder 6 will be described with reference to Figs.

[0038] A case where the cylinder 6 is contracted will be described with reference to Fig. 3. As the cylinder 6 contracts towards the support section 1 side (X1 side), a force F1 is generated which pulls the connection wire 7 on the upper end side of the jib 2 towards the support section 1 side (X1 side). In addition, along with this, a force F2 is generated which pulls the connection wire 7 on the lower end side of the jib 2 towards the tip side (X2 side). Note that the forces F1 and F2 are of the same magnitude. As the connection wire 7 on the lower end side of the jib 2 is pulled towards the tip side (X2 side), the trolley 4 is pulled towards the tip side (X2 side).

[0039] A case where the cylinder 6 is extended will be described with reference to Fig. 4. When the cylinder 6 is extended to the tip side (X2 side) without suspending the suspended object 50, the connecting wire 7 on the upper end side of the jib 2 is pushed by the cylinder 6 and moves to the tip side (X2 side). However, no load F3 pulling the suspension wire 3 in the vertical direction is generated, and no force F4 pulling the trolley 4 toward the support section 1 is generated. In this case, the connecting wire 7 on the lower end side of the jib 2 cannot move, so slack (play) is formed in the connecting wire 7 below the second pulley 9.

[0040] As shown in FIG. 4, when the suspended object 50 is suspended from the hook 31, a vertical load F3 is applied to the suspension wire 3 due to the weight of the suspended object 50. This generates a force F4 that pulls the trolley 4 toward the support column 1 (X1 side). As a result, the trolley 4 moves toward the support column 1 (X1 side). If the connecting wire 7 is loose, the slack is eliminated. Furthermore, the connecting wire 7 is no longer loose and becomes taut, restricting the movement of the trolley 4.

[0041] A detailed description will be given of an example of the use of the jib crane unit. The jib crane unit 100 is transported to a work site with the cylinder 6 contracted and the hook 31 fixed to a hook provided on the tip side (X2 side) of the jib 2. This makes it possible to suppress the swinging of the hook 31. Next, the hook 31 is removed from the jib 2 and positioned vertically downward. The suspended object 50 is suspended from the hook 31. This causes the trolley 4 to move toward the support section 1. Then, by adjusting the extension and retraction of the cylinder 6, the suspended object 50 moves to the arrangement position. Then, with the trolley 4 stopped, the vertical movement mechanism 5 lowers the suspended object 50 to a predetermined depth. Note that while the suspended object 50 is being moved in the vertical direction, the cylinder 6 may be extended and retracted to adjust the position of the suspended object 50.

[0042] (Effects of the embodiment) In this embodiment, the following effects can be obtained.

[0043] In this embodiment, as described above, the jib 2 is formed in an elongated shape extending along the horizontal direction and fixed to the upper end of the support column 1, and serves as a guide when moving the suspended object 50 in the horizontal direction. As a result, the support column 1 does not extend above the jib 2, so that the vertical length (height) of the entire jib crane unit 100 can be prevented from increasing. In addition, the jib crane unit 100 is provided with a cylinder 6 that is attached to the jib 2 so as to extend along the horizontal direction and expands and contracts along the horizontal direction, and a connecting wire 7 that is connected to the trolley 4 and the cylinder 6. When the cylinder 6 is extended, the weight of the suspended object 50 is applied to the hanging wire 3, and the trolley 4 moves toward the support column 1 while pulling the connecting wire 7 via the first pulley 41. This allows the cylinder 6 for moving the trolley 4 horizontally to be attached so as to extend along the horizontal direction, and therefore, unlike a case in which a traverse winch for moving the trolley 4 horizontally and a sheave arranged above the traverse winch are arranged above the jib, it is possible to prevent the vertical length (height) of the entire jib crane unit 100 from increasing. As a result, the vertical length (height) of the entire jib crane unit 100 can be reduced, preventing it from becoming too large in the vertical direction.

[0044] In this embodiment, as described above, the cylinder 6 is arranged to extend along the horizontal direction on the upper surface side of the jib 2, the jib 2 includes the second pulley 9 arranged near the end on the tip side, and the connecting wire 7 is configured to connect the cylinder 6 and the trolley 4 via the second pulley 9. As a result, by arranging the cylinder 6 along the horizontal direction on the upper surface side of the jib 2, it is possible to suppress the horizontal length from increasing compared to the case where the cylinder 6 is arranged to extend horizontally from the end on the tip side of the jib 2. In addition, since the second pulley 9 is arranged at the end on the tip side of the jib 2, it is possible to further reduce the vertical length of the entire jib crane unit 100 compared to the case where a pulley for moving the trolley 4 in the horizontal direction is provided above the jib 2. As a result, it is possible to suppress the horizontal and vertical size of the jib crane unit 100 from increasing.

[0045] In this embodiment, as described above, the vertical movement mechanism 5 includes the winch 51 arranged on the support part 1. As a result, since the winch 51 is arranged on the support part 1, it is possible to suppress the vertical length from increasing compared to the case where the winch 51 is arranged on the jib 2. Furthermore, when the suspended object 50 is arranged deep underground, it is necessary to lengthen the suspension wire 3, and therefore it is necessary to enlarge the winch 51 in accordance with the length of the suspension wire 3. In this case, the weight of the winch 51 increases. Therefore, by arranging the winch 51 on the support part 1, it is possible to suppress the weight of the jib 2 from increasing, unlike the case where the winch 51 is arranged on the jib 2, and to reduce the load on the part where the jib 2 is connected to the support part 1.

[0046] As described above, this embodiment further includes the power supply source 8 that supplies power to the vertical movement mechanism 5, and the cylinder 6 is configured as an electric cylinder that expands and contracts with power supplied from the power supply source 8. By using the power supply source 8 of the vertical movement mechanism 5 as the power source for the electric cylinder, unlike the case where another cylinder such as a hydraulic cylinder is used, there is no need to provide a separate power source, so that it is possible to suppress an increase in the number of parts and to suppress an increase in the size of the device configuration.

[0047] In this embodiment, as described above, the suspension wire 3 is configured to suspend a submersible pump as a suspension object 50 that is placed underground or in a river at a predetermined depth and discharges groundwater or river water accumulated underground. This allows the jib crane unit 100 to be used to place the submersible pump underground or in a river at a predetermined depth and discharge water.

[0048] In this embodiment, as described above, the support column 1 is configured to be mounted on the vehicle 200 including the loading platform 210, and the sum of the vertical length of the loading platform 210 of the vehicle 200 and the vertical length of the support column 1 is configured to be the size of the hanging margin. This allows the jib crane unit 100 to be easily transported to any position by mounting it on the vehicle 200. In addition, since the sum of the vertical length of the loading platform 210 of the vehicle 200 and the vertical length of the support column 1 is configured to be the size of the hanging margin, the vertical length of the support column 1 can be reduced by the vertical length of the loading platform 210 of the vehicle 200 compared to when it is not mounted on the vehicle 200. As a result, the vertical length (height) of the jib crane unit can be suppressed from increasing.

[0049] (Modification) The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications (variations) within the meaning and scope of the claims.

[0050] For example, in the above embodiment, an example has been shown in which the jib crane unit is mounted on a vehicle, but the present invention is not limited to this. In the present invention, the jib crane unit may be disposed on the ground instead of being mounted on a vehicle.

[0051] In the above embodiment, the cylinder is provided at the upper end of the jib, but the present invention is not limited to this. In the present invention, the cylinder may be provided inside the jib or at the tip end of the jib.

[0052] In the above embodiment, the suspended object is an underwater pump, but the present invention is not limited to this. In the present invention, the suspended object may be a device such as a generator.

[0053] In the above embodiment, the suspended object is placed underground or in a river, but the present invention is not limited to this. In the present invention, the suspended object may be placed on the ground.

[0054] In the above embodiment, the cylinder is an electric cylinder, but the present invention is not limited to this. In the present invention, the cylinder may be a hydraulic cylinder.

[0055] In the above embodiment, an example has been shown in which a hook is provided at one end of the suspension wire, but the present invention is not limited to this. In the present invention, a claw for clamping the suspension target may be provided.

[0056] In the above embodiment, the trolley is provided below the jib, but the present invention is not limited to this. In the present invention, the trolley may be disposed at the center of the jib in the vertical direction.

[0057] In the above embodiment, the first pulley and the second pulley are the same size, but the present invention is not limited to this. In the present invention, the first pulley and the second pulley may be different sizes.

[0058] In the above embodiment, the vertical movement mechanism includes a winch, but the present invention is not limited to this. For example, a pulley may be used.

[0059] In the above embodiment, an example is shown in which a drive source for driving the vertical movement mechanism is included, but the present invention is not limited to this. For example, the vertical movement mechanism may be operated manually.

[0060] In the above embodiment, an example was shown in which the operation of the cylinder and the operation of the vertical movement mechanism are not related, but the present invention is not limited to this. For example, the operation of the cylinder and the operation of the vertical movement mechanism may be related. In this case, in order to prevent the suspended object from descending by extending the cylinder when the suspended object is suspended, and to prevent the suspended object from ascending by contracting the cylinder when a load is suspended, the winch of the vertical movement mechanism may be controlled so that the height position of the suspended object does not change with the extension and contraction of the cylinder. [Explanation of symbols]

[0061] 1 Support section 2 Jib 3 Hanging wire 4 Trolley 5 Vertical movement mechanism 6 cylinders 7 Connecting Wires 8 Power supply source 9 Second pulley 41 1st pulley 50 Hanging Objects 51 Winch 100 Jib Crane Unit 200 vehicles

Claims

1. A support portion that is configured to be rotatable and extends along a vertical direction; a jib that is formed in an elongated shape extending along the horizontal direction and is fixed to an upper end of the support column and serves as a guide when moving the suspended object in the horizontal direction; a suspension wire for suspending the object to be suspended; a trolley that is a horizontal movement mechanism for horizontally moving the suspended object suspended by the suspension wire, the trolley being attached to the jib and moving along the horizontal direction in which the jib extends and including a first pulley that supports the suspension wire; a vertical movement mechanism that is disposed closer to the support section than the trolley and moves the suspension wire in the vertical direction by winding up the suspension wire or by feeding out the suspension wire; A cylinder attached to the jib so as to extend along the horizontal direction and expands and contracts along the horizontal direction; A connecting wire connected to the trolley and the cylinder, A jib crane unit configured such that when the cylinder is contracted, the cylinder pulls the connecting wire, causing the trolley to move to the tip side opposite the support section in the direction in which the jib extends, and when the cylinder is extended, the weight of the object to be suspended is applied to the suspension wire, causing the trolley to move toward the support section while pulling the connection wire via the first pulley.

2. The cylinder is disposed so as to extend horizontally along the upper surface side of the jib, The jib includes a second pulley disposed near the tip end, The jib crane unit according to claim 1 , wherein the connecting wire is configured to connect the cylinder and the trolley via the second pulley.

3. The jib crane unit of claim 1 , wherein the vertical movement mechanism includes a winch disposed on the support column.

4. a power supply source for supplying power to the vertical movement mechanism; The jib crane unit according to claim 1 , wherein the cylinder is an electric cylinder that extends and retracts by power supplied from the power supply source.

5. The jib crane unit described in claim 1, wherein the suspension wire is configured to suspend an underwater pump as the suspension object that is placed underground or in a river at a predetermined depth and discharges groundwater or water from the river that has accumulated underground.

6. The support column is configured to be mounted to a vehicle including a cargo bed; The jib crane unit according to claim 1, wherein the sum of the vertical length of the platform of the vehicle and the vertical length of the support pillar is configured to be the size of the hanging allowance.

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