Travel device suspension tool and travel device hoisting method

Abstract

A travel device suspension tool (50) for hoisting a travel device (11) of a construction machine (100) comprises at least one suspension tool body (60) having a fixing part detachably fixed to the travel device (11), and at least one movable member (70) having an attachment part (71) for attaching the suspension device (200) and supported by the suspension tool body (60), The movable member (70) being configured so as to be able to be displaced with respect to the suspension tool body (60) between a single hoisting position (P1), which is a position for hoisting the travel device suspension tool (50) alone, and a travel device hoisting position (P2), which is a position for hoisting the travel device suspension tool (50) and the travel device (11).

Description

Traveling device lifting tool and traveling device lifting method

[0001] The present disclosure relates to a traveling device hoisting tool and a traveling device hoisting method used when hoisting a traveling device such as a crawler traveling device of a construction machine.

[0002] Each of Patent Documents 1 and 2 discloses a technique for lifting a crawler traveling device of a construction machine.

[0003] Generally, the lifting work for lifting a crawler travelling device is carried out using an auxiliary machine such as an auxiliary crane and a travelling device lifting tool. The auxiliary machine includes a lifting device. The lifting device includes, for example, a rope, a connecting part (e.g., a shackle) fixed to the lower end of the rope, and a winch for winding and unwinding the rope.

[0004] The traveling device lifting work includes a single lifting step in which the traveling device lifting tool that is not fixed to the crawler traveling device is lifted by itself, and a traveling device lifting step in which both the traveling device lifting tool and the crawler traveling device are lifted with the traveling device lifting tool fixed to the crawler traveling device.

[0005] The traveling unit hoisting device has a fixing portion detachable from the crawler traveling unit, a first mounting portion to which a shackle of the hoisting device can be attached, and a second mounting portion located away from the first mounting portion to which the shackle can be attached. The first mounting portion is formed at a position on the traveling unit hoisting device that takes into account the position of the center of gravity of the traveling unit hoisting device alone (position 67 in Figure 2 of Patent Document 1). The second mounting portion is formed at a position on the traveling unit hoisting device that takes into account the position of the center of gravity of the object to be hoisted, including the traveling unit hoisting device and the crawler traveling unit (position 65 in Figure 2 of Patent Document 1).

[0006] In the above-described running device lifting operation, the shackle of the lifting device is attached to the first mounting portion in the single unit lifting step, and the shackle of the lifting device is attached to the second mounting portion in the running device lifting step. That is, in the above-described running device lifting operation, the shackle of the lifting device needs to be removed from the first mounting portion and attached to the second mounting portion, or the shackle needs to be removed from the second mounting portion and attached to the first mounting portion. That is, the mounting position of the lifting device needs to be changed.

[0007] JP 2020-97486 A JP 2023-22703 A

[0008] The present disclosure aims to provide a running gear hoisting device and a running gear hoisting method that can perform steps of hoisting the running gear hoisting device alone and hoisting both the running gear hoisting device and the running gear without changing the mounting position of the hoisting device.

[0009] A traveling gear hoisting device according to one aspect of the present disclosure is a traveling gear hoisting device for hoisting the traveling gear of a construction machine, and comprises at least one hoisting device body having a fixing portion that is detachably fixed to the traveling gear, and at least one movable member that has an attachment portion for attaching a hoisting device and is supported by the hoisting device body, wherein the movable member is configured to be displaceable relative to the hoisting device body between a single-unit hoisting position, which is a position for hoisting the traveling gear hoisting device alone, and a traveling gear hoisting position, which is a position for hoisting the traveling gear hoisting device and the traveling gear.

[0010] A method for lifting a running device according to another aspect of the present disclosure is a method for lifting a running device using the running device lifting tool, which includes lifting the running device lifting tool using the lifting tool when the movable member is positioned at the single-unit lifting position, and lifting the running device lifting tool and the running device using the lifting tool when the movable member is positioned at the running device lifting position.

[0011] According to the present disclosure, a running gear hoisting device and a running gear hoisting method are provided that can perform steps of hoisting the running gear hoisting device alone and hoisting both the running gear hoisting device and the running gear without changing the mounting position of the hoisting device.

[0012] FIG. 1 is a diagram showing a traveling unit hoisting tool, a construction machine, and a hoisting device according to an embodiment of the present disclosure. FIG. 2 is a diagram for explaining a traveling unit hoisting method using the traveling unit hoisting tool. FIG. 3 is a side view showing the traveling unit hoisting tool according to the first embodiment. FIG. 4 is a perspective view showing the traveling unit hoisting tool according to the first embodiment. FIG. 5 is a perspective view showing the traveling unit hoisting tool according to a first modified example of the first embodiment. FIG. 6 is a side view showing the traveling unit hoisting tool according to a first modified example of the first embodiment. FIG. 7 is a perspective view showing the traveling unit hoisting tool according to a second embodiment. FIG. 8 is an enlarged view showing the traveling unit hoisting tool according to the second embodiment, with the movable member positioned at the single unit hoisting position. FIG. 9 is an enlarged view showing the traveling unit hoisting tool according to the second embodiment, with the movable member positioned at the traveling unit hoisting position.

[0013] Embodiments of the present disclosure will be described with reference to the drawings.

[0014] As shown in Figure 1, a construction machine 100 according to this embodiment is a crane. As shown in Figures 1 and 2, the construction machine 100 includes a lower traveling body 10, an upper rotating body 20 that is rotatably supported on the lower traveling body 10, and a working device 30. The lower traveling body 10 includes a pair of crawler traveling units 11 and a lower frame 12 that is supported by the pair of crawler traveling units 11. The lower frame 12 may include a car body and at least one axle. The upper rotating body 20 includes an upper frame 21, a cab 22 that is supported on the upper frame 21, and a counterweight 23. The working device 30 includes a boom 31. The working device 30 may further include a jib (not shown) that is supported at the tip of the boom 31.

[0015] The crawler traveling device 11 comprises a crawler frame 13 extending forward and backward, two wheels 14 rotatably supported at the front and rear ends of the crawler frame 13, respectively, and a crawler belt 15 arranged around the crawler frame 13 and the two wheels 14.

[0016] A pair of crawler travelling devices 11 are attached to the right and left sides of the lower frame 12, respectively. The installation and removal of the crawler travelling devices 11 each include a traveling device lifting operation for lifting the crawler travelling devices 11. The traveling device lifting operation is performed using an auxiliary machine such as an auxiliary crane (not shown) and a traveling device lifting tool 50 according to this embodiment. The traveling device lifting tool 50 is a lifting tool for lifting the crawler travelling devices 11. The auxiliary machine is equipped with a lifting device 200. The construction machine 100 is equipped with multiple jacks 101 for stabilizing the posture of the construction machine 100 when performing these operations. The jacks 101 are sometimes called translifters. Each of the multiple jacks 101 may be configured to extend and retract up and down, for example, hydraulically. The multiple jacks 101 are used, for example, to hold the lower frame 12 above the ground when attaching the crawler travel device 11 to the lower frame 12, or when lowering components of the construction machine 100, including the lower frame 12, from a trailer to the ground, for example.

[0017] The hoisting device 200 includes, for example, a rope 201, a shackle 202 (connecting metal fitting) fixed to the lower end of the rope 201, and an unillustrated winch that winds and unwinds the rope 201. The shackle 202 includes, for example, a U-shaped metal fitting 203 (see FIG. 3) and a bolt 204 (see FIG. 3) supported by the metal fitting 203. The shackle 202 can be attached to and detached from the traveling unit hoisting device 50 (specifically, the mounting portion 71 described below) by tightening or loosening the bolt 204 relative to the metal fitting 203.

[0018] The traveling unit lifting work includes a single unit lifting step indicated by a two-dot chain line in Fig. 2 and a traveling unit lifting step indicated by a solid line in Fig. 2. The single unit lifting step is a step of lifting the traveling unit hoisting tool 50 by itself, which is not fixed to the crawler traveling unit 11. The traveling unit lifting step is a step of lifting both the traveling unit hoisting tool 50 and the crawler traveling unit 11 with the traveling unit hoisting tool 50 fixed to the crawler traveling unit 11.

[0019] The following describes the features of the traveling unit suspender 50 according to the embodiment. The traveling unit suspender 50 includes the following first aspect, and preferably includes at least one of the second to eleventh aspects.

[0020] 2 to 10 , the running unit hoisting device 50 according to the first embodiment includes at least one hoisting device main body 60 and at least one movable member 70. The hoisting device main body 60 has a fixing portion 61 that is detachably fixed to the running unit 11. The movable member 70 is supported by the hoisting device main body 60. The movable member 70 has an attachment portion 71 for attaching the hoisting device 200. The movable member 70 is configured to be displaceable relative to the hoisting device main body 60 between a single unit hoisting position P1, which is a position for hoisting the running unit hoisting device 50 alone, and a running unit hoisting position P2, which is a position for hoisting the running unit hoisting device 50 and the running unit 11.

[0021] In this first aspect, the movable member 70 can be displaced relative to the hoisting device main body 60 between the single lifting position P1 and the running device lifting position P2, so that it is possible to perform a single lifting step in which the running device hoisting device 50 is lifted alone, and a running device lifting step in which both the running device hoisting device 50 and the running device 11 are lifted, without changing the mounting position of the shackle 202 of the hoisting device 200.

[0022] The individual lifting position P1 is a position determined taking into consideration the center of gravity of the running device lifting device 50 alone, and the running device lifting position P2 is a position determined taking into consideration the center of gravity of the object to be lifted, including the running device lifting device 50 and the crawler running device 11.

[0023] The crawler frame 13 has fixable portions 16 to which the fixing portions 61 of the sling body 60 are fixed. The fixable portions 16 may be formed on the outer surfaces of the crawler frames 13, for example. In the specific example shown in FIGS. 1 and 2 , the fixable portions 16 have a shape that protrudes outward from the outer surfaces of the crawler frames 13. That is, the fixable portion 16 of the right crawler frame 13 has a shape that protrudes to the right from the right side surface of that crawler frame 13, and the fixable portion 16 of the left crawler frame 13 has a shape that protrudes to the left from the left side surface of that crawler frame 13. The fixable portions 16 may have an insertion hole formed therein for inserting a shaft-shaped fixing member 90 such as a bolt or pin, and the fixing portions 61 of the sling body 60 may have an insertion hole formed therein for inserting the fixing member 90. In this case, the fixing member 90 is inserted through the insertion hole of the fixing portion 61 and the insertion hole of the fixed portion 16 , so that the fixing portion 61 of the sling body is detachably fixed to the fixed portion 16 of the crawler frame 13 .

[0024] The movable member 70 has a base end 74 and a tip end 75, and has a shape extending from the base end 74 toward the tip end 75. As shown in the specific examples of Figures 2 to 10, the movable member 70 may have a shape extending in one direction from the base end 74 toward the tip end 75. The attachment portion 71 is formed on the tip end 75 of the movable member 70. The attachment portion 71 may have an insertion hole formed therein for inserting the shackle 202 of the lifting device 200 (specifically, the bolt 204 of the shackle 202).

[0025] Each of the traveling device hoisting devices 50 shown in Figures 2 to 10 includes a plurality of hoisting device main bodies 60 (specifically, a pair of hoisting device main bodies 60) and a plurality of movable members 70 (specifically, a pair of movable members 70). The pair of hoisting device main bodies 60 are arranged at a distance from each other. The pair of movable members 70 are arranged at a distance from each other. The pair of hoisting device main bodies 60 have similar structures, and the pair of movable members 70 have similar structures. Therefore, the following description will mainly focus on the structure of one of the hoisting device main bodies 60 and the structure of one of the movable members 70.

[0026] [Second Aspect] The traveling unit hoisting device 50 according to the second aspect may further include the following configuration in the traveling unit hoisting device 50 according to the first aspect. That is, in the traveling unit hoisting device 50 according to the second aspect, as shown in Figures 2 to 7, the movable member 70 may be supported rotatably with respect to the hoisting device main body 60. In this second aspect, by performing a simple operation of rotating the movable member 70 with respect to the hoisting device main body 60, the movable member 70 can be displaced with respect to the hoisting device main body 60 between the single unit hoisting position P1 and the traveling unit hoisting position P2.

[0027] 2 to 7, the movable member 70 is supported by the hoisting tool main body 60 so as to be able to rise and fall. At the single unit hoisting position P1, the movable member 70 is positioned in a posture such that it stands upright from the top of the hoisting tool main body 60. That is, the movable member 70 is positioned vertically at the single unit hoisting position P1. On the other hand, at the traveling device hoisting position P2, the movable member 70 is positioned in a posture such that it lies flat. That is, the movable member 70 is positioned horizontally at the traveling device hoisting position P2.

[0028] The suspender main body 60 has a support portion 64 that supports the movable member 70. A base end 74 of the movable member 70 is rotatably supported by the support portion 64 of the suspender main body 60. The support portion 64 is located at the top of the suspender main body 60. Specifically, for example, the support portion 64 may be formed with an insertion hole for inserting a shaft-shaped fixing member 94 such as a bolt or pin, and the base end 74 may be formed with an insertion hole for inserting the fixing member 94. In this case, by inserting the fixing member 94 into the insertion hole of the support portion 64 and the insertion hole of the base end 74, the movable member 70 is supported by the suspender main body 60 so as to be rotatable around the fixing member 94 relative to the suspender main body 60.

[0029] In the traveling unit hoisting device 50 shown in Figures 2 and 3, the hoisting device main body 60 includes a vertical portion 6A and a horizontal portion 6B. When the traveling unit hoisting device 50 is fixed to the crawler traveling unit 11 as shown by the solid line in Figure 2 (hereinafter, this state may be referred to as the fixed state), the vertical portion 6A extends downward from a position above the crawler frame 13 and on the outer side in the left-right direction (the right side in Figure 2). In the fixed state, the horizontal portion 6B extends from the upper portion of the vertical portion 6A to the inner side in the left-right direction (the left side in Figure 2). In the fixed state, the horizontal portion 6B is located above the crawler frame 13. More specifically, in the fixed state, the horizontal portion 6B is located above the top surface of the crawler belt 15, and part or all of the horizontal portion 6B is located in a position that overlaps the top surface of the crawler belt 15 in a plan view.

[0030] In each of the traveling unit hoisting device 50 shown in Figure 7 and the traveling unit hoisting device 50 shown in Figure 8 described later, the hoisting device main body 60 has a vertical portion 6A but does not have a horizontal portion 6B like the traveling unit hoisting device 50 shown in Figure 3. In each of the traveling unit hoisting device 50 shown in Figure 7 and the traveling unit hoisting device 50 shown in Figure 8 described later, when the movable member 70 is placed at the traveling unit hoisting position P2 in the fixed state, the movable member 70 is positioned above the upper surface of the crawler belt 15 and is positioned so as to overlap the upper surface of the crawler belt 15 in a plan view.

[0031] The hoisting device main body 60 has a lower abutment portion 66. The lower abutment portion 66 is a portion that abuts against the crawler frame 13 below the fixing portion 61 when the fixing portion 61 of the hoisting device main body 60 is fixed to the fixation portion 16 of the crawler frame 13. In the specific example shown in FIGS. 2 and 3 , the lower abutment portion 66 is supported by the lower end of the vertical portion 6A of the hoisting device main body 60. The lower abutment portion 66 has an adjustment mechanism for adjusting the amount of protrusion from the lower end of the hoisting device main body 60 (the lower end of the vertical portion 6A). The adjustment mechanism may include a bolt and a nut. The fixing portion 61 of the hoisting device main body 60 is allowed to rotate slightly around the fixing member 90 relative to the fixation portion 16 of the crawler frame 13. Therefore, by adjusting the amount of protrusion from the lower end of the hoisting device main body 60 using the adjustment mechanism, the position of the center of gravity of the object to be lifted, including the traveling device hoisting device 50 and the crawler traveling device 11, can be fine-tuned.

[0032] [Third Aspect] The traveling unit hoisting device 50 according to the third aspect preferably further comprises the following configuration in addition to the traveling unit hoisting device 50 according to the second aspect. That is, the traveling unit hoisting device 50 according to the third aspect preferably comprises a first rotation limiting part 91 that, when the movable member 70 is positioned at the individual lifting position P1 as shown in Fig. 3, limits further rotation of the movable member 70 in the rotation direction D1 when the movable member 70 is displaced from the traveling unit hoisting position P2 to the individual lifting position P1. In this third aspect, when the movable member 70 is positioned at the individual lifting position P1, further rotation of the movable member 70 in the rotation direction D1 from the individual lifting position P1 is limited, making it easy to position the movable member 70 at the individual lifting position P1.

[0033] The first rotation limiting part 91 may be a separate member from the sling body 60 and the movable member 70, or may be a part of the sling body 60 or a part of the movable member 70. When the first rotation limiting part 91 is a separate member from the sling body 60 and the movable member 70, the first rotation limiting part 91 may be fixed to the sling body 60 or may be fixed to the movable member 70. The first rotation limiting part 91 may have an abutting part that abuts against the sling body 60 or the movable member 70 when the movable member 70 is positioned at the individual lifting position P1. When the movable member 70 is positioned at the individual lifting position P1, the first rotation limiting part 91 may be configured to abut against the sling body 60 or the movable member 70, thereby restricting further rotation of the movable member 70 in the rotation direction D1.

[0034] [Fourth Aspect] The running unit hoisting device 50 according to the fourth aspect preferably further comprises the following configuration in addition to the running unit hoisting device 50 according to the second or third aspect. That is, the running unit hoisting device 50 according to the fourth aspect preferably further comprises a second rotation limiting part 92 that limits the rotation of the movable member 70 relative to the hoisting device main body 60 when the movable member 70 is positioned at the running unit hoisting position P2. In this fourth aspect, the rotation of the movable member 70 positioned at the running unit hoisting position P2 is limited when the running unit hoisting device 50 and the running unit 11 are hoisted.

[0035] [Fifth Aspect] A traveling unit hoisting device 50 according to the fifth aspect preferably further comprises the following configuration in addition to the traveling unit hoisting device 50 according to the fourth aspect. That is, in the traveling unit hoisting device 50 according to the fifth aspect, as shown in Figures 3 and 4, the hoisting device main body 60 preferably has an insertion hole 62, the movable member 70 preferably has an insertion hole 72, and the second rotation limiting part 92 preferably includes a pin 93 that is inserted into the insertion hole 62 of the hoisting device main body 60 and the insertion hole 72 of the movable member 70 when the movable member 70 is positioned at the traveling unit hoisting position P2. In this fifth aspect, the movable member 70 can be held at the traveling unit hoisting position P2 by the simple operation of inserting the pin 93 into the insertion hole 62 of the hoisting device main body 60 and the insertion hole 72 of the movable member 70 when the movable member 70 is positioned at the traveling unit hoisting position P2.

[0036] In the specific example shown in Figures 3 and 4, movable member 70 has a tip-side protrusion 76 that protrudes in a bent manner from tip end 75. This tip-side protrusion 76 protrudes from tip end 75 in a direction intersecting the extension direction of movable member 70. For example, as shown by the two-dot chain line in Figure 3, in the fixed state and when movable member 70 is located at traveling device lifting position P2, tip-side protrusion 76 may protrude downward from tip end 75. Specifically, in the fixed state and when movable member 70 is located at traveling device lifting position P2, an intermediate portion of movable member 70 between base end 74 and tip end 75 may be located above lateral portion 6B of hoisting device main body 60 (specifically, directly above lateral portion 6B). Insertion hole 62 for inserting pin 93 may be formed in tip end portion 65 (inner end portion) of horizontal portion 6B of suspender main body 60, and insertion hole 72 for inserting pin 93 may be formed in tip end protrusion 76 of movable member 70. By inserting pin 93 through insertion hole 62 in tip end portion 65 of horizontal portion 6B and insertion hole 72 in tip end protrusion 76 of movable member 70, movable member 70 is fixed to horizontal portion 6B of suspender main body 60.

[0037] 5 to 7 , the movable member 70 is also supported by the hoisting tool body 60 so as to be rotatable around the fixed member 94 relative to the hoisting tool body 60. The second rotation limiting part 92 includes an insertion hole 92A formed in the support part 64 located at the top of the hoisting tool body 60, and a pin 93. The base end part 74 of the movable member 70 has an insertion hole 95, which is not located at a position corresponding to the insertion hole 92A of the second rotation limiting part 92 at the single unit hoisting position P1 shown in FIG. 7 , but is located at a position corresponding to the insertion hole 92A of the second rotation limiting part 92 at the traveling device hoisting position P2 shown in FIGS. 5 and 6 . At this running device lifting position P2, a pin 93 is inserted into the insertion hole 92A of the second rotation limiting portion 92 and the insertion hole 95 of the base end portion 74 of the movable member 70, thereby fixing the movable member 70 to the lifting device main body 60, as shown in Figure 6.

[0038] [Sixth Aspect] A traveling unit hoisting device 50 according to a sixth aspect may further include the following configuration in the traveling unit hoisting device 50 according to the first aspect. That is, in the traveling unit hoisting device 50 according to the sixth aspect, the movable member 70 may be supported slidably relative to the hoisting device main body 60, as shown in Fig. 8. In this sixth aspect, by performing a simple operation of sliding the movable member 70 relative to the hoisting device main body 60, the movable member 70 can be displaced relative to the hoisting device main body 60 between the single unit hoisting position P1 and the traveling unit hoisting position P2.

[0039] [Seventh Aspect] The traveling unit hoisting device 50 according to the seventh aspect preferably further comprises the following configuration in addition to the traveling unit hoisting device 50 according to the sixth aspect. That is, in the traveling unit hoisting device 50 according to the seventh aspect, it is preferable that one of the hoisting device main body 60 and the movable member 70 has a hole or groove formed along the one member to allow sliding of the movable member 70 relative to the hoisting device main body 60, and the other of the hoisting device main body 60 and the movable member 70 has a shaft member that can be displaced along the hole or groove. In this seventh aspect, the shaft member can be displaced along the hole or groove to displace the movable member 70 relative to the hoisting device main body 60 between the single unit hoisting position P1 and the traveling unit hoisting position P2. The shaft member is a shaft-shaped member such as a bolt or pin.

[0040] In the specific example shown in Figures 8 to 10, the movable member 70 has a long hole 73 formed along the longitudinal direction of the movable member 70, and the sling body 60 has an axial member 63 that is disposed inside the long hole 73 and can be displaced along the long hole 73.

[0041] [Eighth Aspect] The traveling unit hoisting device 50 according to the eighth aspect preferably further comprises the following configuration in addition to the traveling unit hoisting device 50 according to the seventh aspect. That is, in the traveling unit hoisting device 50 according to the eighth aspect, the hole or the groove preferably has a fitting portion into which at least a portion of the shaft member fits when the movable member 70 is disposed at the individual lifting position P1. In this eighth aspect, the fitting of at least a portion of the shaft member makes it easier to maintain the movable member 70 at the individual lifting position P1.

[0042] 8 to 10, the elongated hole 73 of the movable member 70 has a fitting portion 73A including a recess recessed downward from the elongated hole 73 at a position corresponding to the end of the elongated hole 73. When the movable member 70 is placed at the single-unit lifting position P1 as shown in FIG. 9, a part of the shaft member 63 of the suspending tool main body 60 fits into the fitting portion 73A of the movable member 70.

[0043] In the specific example shown in FIG. 9 , the lifting tool main body 60 has a support surface 69. This support surface 69 is a surface that faces the underside 70S of the movable member 70 when the movable member 70 is positioned at the individual lifting position P1 as shown in FIG. 9 . When the movable member 70 is positioned at the individual lifting position P1 as shown in FIG. 9 , the movable member 70 is positioned in an inclined position such that the base end 74 ( FIG. 10 ) is lower than the tip end 75. In this inclined position, the underside 70S of the movable member 70 is inclined in the same direction as the inclination of the movable member 70, and the support surface 69 is a plane that is approximately parallel to the underside 70S of the movable member 70. This stabilizes the position of the movable member 70 at the individual lifting position P1.

[0044] In the specific example shown in FIG. 10 , the movable member 70 has a support surface 79. This support surface 79 is a surface that faces the side surface 60S of the hoisting tool main body 60 when the movable member 70 is positioned at the traveling device hoisting position P2 as shown in FIG. 10 . This support surface 79 is formed on the base-end protrusion 77 of the movable member 70. This base-end protrusion 77 is a portion that protrudes downward from the base end 74 of the movable member 70 when the movable member 70 is in the fixed state and positioned at the traveling device hoisting position P2, and the support surface 79 is the inner surface of the base-end protrusion 77. This support surface 79 is a plane that is approximately parallel to the side surface 60S of the hoisting tool main body 60. This stabilizes the posture of the movable member 70 at the traveling device hoisting position P2.

[0045] [Ninth Aspect] A traveling unit hoisting device 50 according to a ninth aspect preferably includes the traveling unit hoisting device 50 according to any one of the first to eighth aspects, further including the following configuration. That is, in the traveling unit hoisting device 50 according to the ninth aspect, the at least one movable member 70 preferably includes a first movable member 70, a second movable member 70, and a connecting member 78 connecting the first movable member 70 and the second movable member 70. In this ninth aspect, as shown in FIGS. 5 and 7 , the first movable member 70 and the second movable member 70 are connected by the connecting member 78, so that the first movable member 70 and the second movable member 70 move in conjunction with each other. This improves the efficiency of the operation of displacing the pair of movable members 70 between the individual hoisting position P1 and the traveling unit hoisting position P2.

[0046] [Tenth Aspect] A traveling device hoisting device 50 according to the tenth aspect preferably includes the traveling device hoisting device 50 according to any one of the first to ninth aspects, further comprising the following configuration. That is, in the traveling device hoisting device 50 according to the tenth aspect, the at least one movable member 70 preferably includes a first movable member 70 and a second movable member 70, the first movable member 70 and the second movable member 70 being spaced apart from each other, and each of the first movable member 70 and the second movable member 70 being formed from a single plate-like member. In this tenth aspect, because the first movable member 70 and the second movable member 70 are spaced apart from each other, stable lifting operations are possible, and because the first movable member 70 and the second movable member 70 are each formed from a single plate-like member, it is possible to suppress an increase in the weight of each movable member 70. This improves the efficiency of the work of displacing each of the first movable member 70 and the second movable member 70 between the individual lifting position P1 and the traveling device lifting position P2.

[0047] [Eleventh aspect] The traveling device lifting method according to the eleventh aspect is a traveling device lifting method for lifting a crawler traveling device 11 using a traveling device lifting tool 50 according to any one of the first to tenth aspects, and includes lifting the traveling device lifting tool 50 using the lifting device 200 when the movable member 70 is positioned at a single-unit lifting position P1, and lifting the traveling device lifting tool 50 and the traveling device 11 using the lifting device 200 when the movable member 70 is positioned at a traveling device lifting position P2. In this 11th aspect, the movable member 70 can be displaced relative to the hoisting device main body 60 between the individual hoisting position P1 and the running device hoisting position P2, so that it is possible to perform the individual hoisting step of hoisting the running device hoisting device 50 alone and the running device hoisting step of hoisting both the running device hoisting device 50 and the running device 11 without changing the mounting position of the shackle 202 of the hoisting device 200.

[0048] [Other Modifications] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and includes, for example, the following modifications 2 to 7.

[0049] (A) Modification 2 In the above embodiment, the movable member 70 includes a first movable member 70 and a second movable member 70, but the traveling device suspender may include only a single movable member.

[0050] (B) Modification 3 In the first embodiment, the movable member 70 is disposed in a posture in which it stands up from the top of the hoisting tool main body 60, i.e., in a vertical orientation, at the individual lifting position P1, and the movable member 70 is disposed in a posture in which it lies down, i.e., in a horizontal orientation, at the traveling device lifting position P2. However, the movable member 70 may be configured as follows. That is, the movable member 70 according to Modification 3 may be disposed in a posture in which it stands up from the top of the hoisting tool main body 60, i.e., in a vertical orientation, at the traveling device lifting position P2, and the movable member 70 may be disposed in a posture in which it lies down, i.e., in a horizontal orientation, at the individual lifting position P1. In this modification 3, the position of the support portion of the hoisting tool main body 60 that rotatably supports the base end portion 74 of the movable member 70 may be set closer to the tip end portion 65 of the lateral portion 6B of the hoisting tool main body 60 than the position of the support portion 64 of the hoisting tool main body 60 in FIG. 3, for example.

[0051] (C) Modification 4 The movable member 70 according to Modification 4 may be positioned in a lying-down position, i.e., horizontally, at both the individual lifting position P1 and the traveling unit lifting position P2. In this modification 4, the position of the support portion of the hoisting tool main body 60 may be set, for example, at a position (intermediate position) between the position of the support portion 64 of the hoisting tool main body 60 in FIG. 3 and the position of the support portion of the hoisting tool main body 60 in Modification 3, and the movable member 70 may be rotatably supported on the support portion of the hoisting tool main body 60 at, for example, an intermediate position between the base end portion 74 and the tip end portion 75. The movable member 70 according to Modification 4 may be configured to switch from one of the individual lifting position P1 and the traveling unit lifting position P2 to the other by rotating a predetermined angle (e.g., 180 degrees) from either the individual lifting position P1 or the traveling unit lifting position P2.

[0052] (D) Modification 5 The structure for restricting the rotation of the movable member 70 at each of the single unit lifting position P1 and the traveling device lifting position P2 is not limited to the specific examples shown in FIGS. 2 to 10, and may be, for example, the following structure.

[0053] In the traveling unit hoisting device 50 according to the first embodiment shown in Figures 3 and 4, the movable member 70 positioned at the individual lifting position P1 is restricted from further rotation in the rotation direction D1 (see Figure 3) by the hoisting device main body 60 or the movable member 70 abutting against the abutment portion of the first rotation limiting portion 91, but the rotation of the movable member 70 positioned at the individual lifting position P1 may be restricted by inserting a pin into an insertion hole formed in each of the movable member 70 and the hoisting device main body 60. Similarly, in the traveling unit hoisting device 50 according to Variation 1 of the first embodiment shown in Figures 5 to 7, the rotation of the movable member 70 positioned at the individual lifting position P1 may be restricted by inserting a pin into an insertion hole formed in each of the movable member 70 and the hoisting device main body 60.

[0054] 8 to 10, in the traveling device hoisting device 50 according to the second embodiment, the rotation of the movable member 70 disposed at the single-unit hoisting position P1 may be restricted by inserting a pin into an insertion hole formed in each of the movable member 70 and the hoisting device body 60. The fitting portion 73A in the elongated hole 73 of the movable member 70 may be omitted.

[0055] 8 to 10, in the traveling unit hoisting device 50 according to the second embodiment, the rotation of the movable member 70 disposed at the traveling unit hoisting position P2 may be restricted by inserting a pin into an insertion hole formed in each of the movable member 70 and the hoisting device main body 60. The base-end protrusion 77 of the movable member 70 (specifically, the support surface 79 of the base-end protrusion 77) may be omitted.

[0056] (E) Modification 6 In the above embodiment, the traveling device is a crawler traveling device, but the traveling device in the present disclosure does not necessarily have to be a crawler traveling device, and may be another type of traveling device.

[0057] (F) Modification 7 In the above embodiment, the construction machine 100 is a crane, but the construction machine in the present disclosure may be other construction machines such as a shovel or a bulldozer.

Claims

1. A traveling device hoist for lifting a traveling device of a construction machine, comprising at least one hoist body having a fixing portion detachably fixed to the traveling device, and at least one movable member having an attachment portion for attaching a hoisting device and supported by the hoist body, wherein the movable member is configured to be displaceable relative to the hoist body between a single-lifting position which is a position for lifting the traveling device hoist alone and a traveling-device lifting position which is a position for lifting the traveling device hoist and the traveling device.

2. The traveling device hoist according to claim 1, wherein the movable member is rotatably supported relative to the hoist body.

3. The traveling device hoist according to claim 2, further comprising a first rotation restricting portion for restricting further rotation in the rotation direction when the movable member is displaced from the traveling-device lifting position to the single-lifting position in a state where the movable member is disposed at the single-lifting position.

4. The traveling device hoist according to claim 2 or 3, further comprising a second rotation restricting portion for restricting rotation of the movable member relative to the hoist body in a state where the movable member is disposed at the traveling-device lifting position.

5. Each of the hoist body and the movable member has an insertion hole, and the second rotation restricting portion includes a pin inserted into the insertion hole of the hoist body and the insertion hole of the movable member in a state where the movable member is disposed at the traveling-device lifting position.

6. The traveling device hoist according to claim 1, wherein the movable member is slidably supported relative to the hoist body.

7. One of the hoist body and the movable member has a hole or a groove formed along the one member to allow sliding of the movable member relative to the hoist body, and the other of the hoist body and the movable member has a shaft member displaceable along the hole or the groove.

8. The traveling device hoist according to claim 7, wherein the hole or the groove has a fitting portion into which at least a part of the shaft member fits in a state where the movable member is disposed at the single-lifting position.

9. The at least one movable member includes a first movable member, a second movable member, and a connecting member that connects the first movable member and the second movable member. The traveling device hoist according to any one of claims 1 to 8.

10. The at least one movable member includes a first movable member and a second movable member. The first movable member and the second movable member are arranged at intervals from each other. Each of the first movable member and the second movable member is constituted by a single plate-like member. The traveling device hoist according to any one of claims 1 to 9.

11. A traveling device hoisting method for hoisting the traveling device using the traveling device hoist according to any one of claims 1 to 10, including hoisting the traveling device hoist using the hoisting device in a state where the movable member is disposed at the single hoisting position, and hoisting the traveling device hoist and the traveling device using the hoisting device in a state where the movable member is disposed at the traveling device hoisting position.

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