Hook for construction machine and construction machine

Abstract

To provide a hook for a construction machine capable of adjusting a suspended weight in accordance with a situation.SOLUTION: A hook for a construction machine includes: a hook portion capable of hooking a to-be-hooked portion of a suspended-load side; and a weight portion separably coupled to the hook portion. The hook includes a rope connection portion to which the hook portion is connected. In each of a state where the weight portion is separated from the hook portion and a state where the weight portion is coupled to the hook portion, a rope for suspension can be connected to the rope connection portion.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a hook for construction machinery and construction machinery.

Background Art

[0002] In the construction machinery of Patent Document 1, a hook can be suspended from the front end of a boom that can be raised and lowered via a suspension rope. Then, the suspended part on the suspended load side is hooked to the hook part of the hook suspended from the front end of the boom, and the suspended load is lifted. In the lifting operation of the suspended load, a plurality of types of hooks having different weights are prepared, and the plurality of types of hooks are selectively used according to the weight of the suspended load, the raised and lowered posture of the boom during operation, and the type of construction machinery used. That is, one type corresponding to a situation including the weight of the suspended load, the raised and lowered posture of the boom during operation, and the type of construction machinery used is selected from a plurality of types of hooks having different weights, and the selected one type is used to lift the suspended load.

[0003] In the lifting operation of the suspended load, from the viewpoint of work efficiency and the like, it is required to make it possible to adjust the lifted weight in accordance with a situation including the weight of the suspended load, the raised and lowered posture of the boom during operation, and the type of construction machinery used without preparing a plurality of types of hooks having different weights. That is, it is required to make it possible to adjust the lifted weight in accordance with a situation including the weight of the suspended load, the raised and lowered posture of the boom during operation, and the type of construction machinery used in one hook.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide a hook for a construction machine capable of adjusting the weight to be suspended according to the situation, and a construction machine including the hook.

Means for Solving the Problems

[0006] To achieve the above object, a hook for a construction machine according to an aspect of the present invention includes a hook portion capable of hooking a hooked portion on the suspended load side, a weight portion detachably connected to the hook portion, and a rope connection portion to which a rope for suspension can be connected in a state where the hook portion is connected and the weight portion is separated from the hook portion, and in a state where the weight portion is connected to the hook portion.

Effects of the Invention

[0007] According to the present invention, it is possible to provide a hook for a construction machine capable of adjusting the weight to be suspended according to the situation, and a construction machine including the hook.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] First, as an example of an embodiment, the first embodiment will be described. In the first embodiment, a crane is provided as a construction machine. FIG. 1 shows the crane 1 according to the first embodiment. As shown in FIG. 1, the crane 1 includes a traveling body 2 and a slewing body 3. The slewing body 3 is connected to the traveling body 2 from the vertically upper side (arrow Z1 side). Further, the slewing body 3 is rotatable with respect to the traveling body 2 about a slewing axis P along the vertical direction (the directions indicated by arrow Z1 and arrow Z2).

[0011] In the traveling body 2, a front-rear direction (the directions indicated by arrow X1 and arrow X2) that intersects (is orthogonal or substantially orthogonal) to the vertical direction, and a width direction (a direction orthogonal or substantially orthogonal to the paper surface in FIG. 1) that intersects (is orthogonal or substantially orthogonal) to both the vertical direction and the front-rear direction are defined. Also, in the slewing body 3, a front-rear direction that intersects (is orthogonal or substantially orthogonal) to the vertical direction, and a width direction that intersects (is orthogonal or substantially orthogonal) to both the vertical direction and the front-rear direction are defined. FIG. 1 shows a state where the front-rear direction of the traveling body 2 coincides or substantially coincides with the front-rear direction of the slewing body 3, and the width direction of the traveling body 2 coincides or substantially coincides with the width direction of the slewing body 3. Also, FIG. 1 shows the crane 1 in a state where the front side (arrow X1 side) of the traveling body 2 coincides or substantially coincides with the front side of the slewing body 3. Also, FIG. 1 shows a side view as viewed from one side in the width direction of the traveling body 2.

[0012] The traveling body 2 includes a driver's cab 5 and two pairs of outriggers 6A, 6B. In the driver's cab 5, operations related to the traveling of the crane 1 are input. Also, in the traveling body 2, a pair of outriggers 6A is provided at the front side portion, and a pair of outriggers 6B is provided at the rear side portion. During work or the like of the crane 1, each of the outriggers 6A, 6B is grounded to the ground.

[0013] The rear end of the boom 7 is attached to the revolving body 3. The boom 7 extends along the longitudinal direction from the rear end to the front end. The boom 7 can be raised and lowered with respect to the revolving body 3. Also, the boom 7, together with the revolving body 3, can be rotated with respect to the traveling vehicle body 2. The revolving body 3 is provided with a cab (operation room) 8. In the cab 8, operations related to the operations of the crane 1, such as the operation of rotating the revolving body 3 and the operation of raising and lowering the boom 7, are input. In the revolving body 3, the cab 8 is arranged side by side on one side in the width direction with respect to the boom 7.

[0014] Also, a sub winch (winch) 11 is provided on the revolving body 3, and a sub winding rope (rope) 12 extends from the sub winch 11. The sub winding rope 12 extends from the rear side to the front side of the boom 7 on the boom upper surface (the rising side surface) of the boom 7. When working with the crane 1, the sub winding rope 12 is connected to a sub hook (hook) 13 at the extending end from the sub winch 11. In an example, when working with the crane 1, the sub winding rope 12 is hung on a guide sheave 15 and a luffing sheave 16 arranged at the front end of the boom 7. Then, the sub hook 13 is suspended from the luffing sheave 16 via the sub winding rope 12. For this reason, the sub hook 13 is suspended from the front end of the boom 7 via the sub winding rope 12.

[0015] Also, in another example, when working with the crane 1, a jib (not shown) is attached to the front end of the boom 7. And in the state where the jib is raised with respect to the boom 7, the sub winding rope 12 extends from the rear side to the front side of the boom 7 along the boom upper surface of the boom 7, and then extends along the jib from the rear side to the front side of the jib. Then, the sub hook 13 is suspended from the front end of the jib via the sub winding rope 12. In FIG. 1, for example, the state where the crane 1 is traveling is shown, and the boom 7 is in a state of being lowered with respect to the revolving body 3. Also, in the state of FIG. 1, the jib is stored in a state along the boom side surface (the surface facing one side in the width direction) of the boom 7.

[0016] Figures 2 to 6 show the supplementary hook 13 according to this embodiment. As shown in Figures 2 to 6 and the like, in the supplementary hook 13, a height direction (the directions indicated by arrow H1 and arrow H2), a width direction (the directions indicated by arrow W1 and arrow W2) that intersects (is orthogonal or substantially orthogonal) to the height direction, and a depth direction (the directions indicated by arrow D1 and arrow D2) that intersects (is orthogonal or substantially orthogonal) to both the height direction and the width direction are defined. And in the supplementary hook 13, one side in the height direction becomes the upper side (arrow H1 side), and the side opposite to the upper side in the height direction becomes the lower side (arrow H2 side).

[0017] In a state where the supplementary hook 13 is suspended from the front end of the boom 7 or the front end of the jib, the height direction of the supplementary hook 13 is along the vertical direction. And in a state where the supplementary hook 13 is suspended from the front end of the boom 7 or the front end of the jib, in the supplementary hook 13, the upper side in the height direction coincides or substantially coincides with the vertically upper side, and the lower side in the height direction coincides or substantially coincides with the vertically lower side. And in a state where the supplementary hook 13 is suspended from the front end of the boom 7 or the front end of the jib, each of the width direction and the depth direction of the supplementary hook 13 is along the horizontal plane.

[0018] Also, in the supplementary hook 13, a virtual central axis C along the height direction is defined. The supplementary hook 13 includes a hook portion 21, a weight portion 22, and a rope connection portion 23. The hook portion 21 is attached to the rope connection portion 23 from the lower side in the height direction and is connected to the rope connection portion 23 from the lower side in the height direction. The weight portion 22 is separably connected to the hook portion 21 and is connected to the hook portion 21 with the rope connection portion 23 interposed therebetween. Due to such a configuration, in the supplementary hook 13, the weight portion 22 is separable from the hook portion 21.

[0019] Also, the rope connection portion 23 includes a connection member 25 and an additional connection member 26. In the supplementary hook 13, the hook portion 21 is attached to the connection member 25 from the lower side in the height direction and is connected to the connection member 25 from the lower side in the height direction. In the operation using the crane 1, by hooking the hooked portion on the suspended load side to the hook portion 21 of the supplementary hook 13, the supplementary hook 13 can lift the suspended load.

[0020] In addition, in the auxiliary hook 13, the supplementary winding rope 12, which is a rope for suspension, can be connected to the rope connection part 23 in each of the state where the weight part 22 is separated from the hook part 21 and the state where the weight part 22 is connected to the hook part 21. Therefore, in each of the state where the weight part 22 is separated from the hook part 21 and the state where the weight part 22 is connected to the hook part 21, the auxiliary hook 13 can be suspended from the front end part of the boom 7 or the front end part of the jib via the supplementary winding rope 12. Note that in the auxiliary hook 13, when the weight part 22 is connected to the hook part 21, the weight that can be suspended increases compared to the state where the weight part 22 is separated from the hook part 21.

[0021] The hook part 21 includes a base end E1 which is a connection position to the connection member 25 of the rope connection part 23, and a tip end E2 which is an extended end on the side opposite to the base end E1, and extends from the base end E1 to the tip end E2. The hook part 21 extends in a curved shape from the base end E1 to the tip end E2 when viewed from the depth direction. In an example of FIGS. 2 to 6, the hook part 21 extends in an arc shape or a substantially arc shape between the base end E1 and the tip end E2 when viewed from the depth direction. Also, in an example of FIGS. 2 to 6, folding positions B1 and B2 are formed between the base end E1 and the tip end E2 in the hook part 21. In the hook part 21, each of the base end E1, the tip end E2, and the folding positions B1 and B2 is not shifted or hardly shifted in the depth direction of the auxiliary hook 13 with respect to the central axis C.

[0022] In addition, in the hook part 21, the tip end E2 is shifted from the central axis C to one side (arrow W1 side) in the width direction of the auxiliary hook 13, and the folding position (first folding position) B1 is shifted from the central axis C to the side opposite to the side where the tip end E2 is located (arrow W2 side) in the width direction of the auxiliary hook 13. In an example, the folding position B1 is located at an angular position 180° or approximately 180° away from the tip end E2 in the axial rotation direction of the central axis C. Also, in the hook part 21, each of the base end E1 and the folding position (second folding position) B2 is not shifted or hardly shifted in the width direction of the auxiliary hook 13 with respect to the central axis C. In an example, the central axis C passes through the base end E1 and the folding position B2 in the hook part 21.

[0023] When the hook portion 21 is folded back at the folding position (the first folding position) B1, the hook portion 21 extends from the base end E1 to the folding position B1 in a direction away from the tip end E2 in the width direction, and extends from the folding position B1 to the tip end E2 in a direction approaching the tip end E2 in the width direction. Then, when the hook portion 21 is folded back at the folding position (the second folding position) B2, the hook portion 21 extends from the base end E1 to the folding position B2 downward in the height direction, and extends from the folding position B2 to the tip end E2 upward in the height direction.

[0024] In the auxiliary hook 13, the weight portion 22 includes a plurality of weight members 27 that are separable from each other. Therefore, the weight portion 22 can be divided into a plurality of weight members 27. In the weight portion 22, one or more of the plurality of weight members 27 are connected to the hook portion 21 with the rope connection portion 23 interposed therebetween. Also, in the weight portion 22, the number of weight members 27 connected to the hook portion 21 can be changed. Accordingly, in the auxiliary hook 13, the number of weight members 27 connected to the hook portion 21 can be adjusted.

[0025] Further, in the auxiliary hook 13, regardless of the number of weight members 27 connected to the hook portion 21, in each state where one or more weight members 27 are connected to the hook portion 21, the supplementary winding rope 12, which is a rope for suspension, can be connected to the rope connection portion 23. For this reason, regardless of the number of weight members 27 connected to the hook portion 21, in each state where one or more weight members 27 are connected to the hook portion 21, the auxiliary hook 13 can be suspended from the front end portion of the boom 7 or the front end portion of the jib via the supplementary winding rope 12. Note that in the auxiliary hook 13, the weight to be suspended increases as the number of weight members 27 connected to the hook portion 21 increases.

[0026] In an example of FIGS. 2 to 6, three weight members 27A to 27C are provided in the weight portion 22. In the auxiliary hook 13, in each of the states where only one weight member 27A is connected to the hook portion 21, only two weight members 27A and 27B are connected to the hook portion 21, and all three weight members 27A to 27C are connected to the hook portion 21, the auxiliary winding rope 12, which is a rope for suspension, can be connected to the rope connection portion 23. And in each of the states where only one weight member 27A is connected to the hook portion 21, only two weight members 27A and 27B are connected to the hook portion 21, and all three weight members 27A to 27C are connected to the hook portion 21, the auxiliary hook 13 can be suspended from the front end portion of the boom 7 or the front end portion of the jib via the auxiliary winding rope 12.

[0027] Here, FIG. 2 illustrates, in a perspective view, a configuration in which only one weight member 27A is connected to the hook portion 21. FIG. 3 illustrates, in a perspective view, a configuration in which, from the state where one weight member 27A is connected to the hook portion 21, another weight member 27B is further connected to the hook portion 21. Further, FIG. 4 illustrates, in a perspective view, a configuration in which, from the state where two weight members 27A and 27B are connected to the hook portion 21, an additional connecting member 26 of the rope connection portion 23 is further connected to the hook portion 21. FIG. 5 illustrates, in a perspective view, a configuration in which, from the state where two weight members 27A and 27B and the additional connecting member 26 are connected to the hook portion 21, another weight member 27C is further connected to the hook portion 21. Also, FIG. 6 shows, in a cross section orthogonal or substantially orthogonal to the width direction of the auxiliary hook 13, a state where all three weight members 27A to 27C are attached to the hook portion 21.

[0028] As shown in FIGS. 2 to 6 and the like, in the auxiliary hook 13, through holes 31, 32, and 33 are formed in the connecting member 25 of the rope connecting portion 23. The through hole 31 penetrates the connecting member 25 along the width direction of the auxiliary hook 13. Further, each of the through holes 32 and 33 penetrates the connecting member 25 along the depth direction of the auxiliary hook 13. In the connecting member 25, the through holes 31, 32, and 33 are arranged in this order from the lower side in the height direction. That is, in the connecting member 25, the through hole 32 is arranged above the through hole 31 in the height direction, and the through hole 33 is arranged above the through hole 32 in the height direction.

[0029] In the weight portion 22, each of the plurality of weight members 27 is formed in a cylindrical shape. And in each of the weight members 27, the circumferential direction and the radial direction are defined. In a state where one or more weight members 27 are connected to the hook portion 21, in each of the weight members 27 connected to the hook portion 21, the circumferential direction is along the direction around the central axis C. In one example, in a state where one or more weight members 27 are connected to the hook portion 21, the central axis C is coaxial or substantially coaxial with the central axis of each of the weight members 27 connected to the hook portion 21.

[0030] Four through holes 35 are formed in each of the plurality of weight members 27. In each of the weight members 27, each of the four through holes 35 penetrates the weight member 27 in the radial direction. In each of the weight members 27, the four through holes 35 are formed with an interval in the circumferential direction and are arranged at equal or substantially equal intervals in the circumferential direction. For this reason, in each of the weight members 27, each of the through holes 35 is arranged at an angular position 90° or substantially 90° away from the through hole 35 arranged adjacent in the circumferential direction.

[0031] In the following description, in each of the plurality of weight members 27, four through holes 35 are also denoted as through holes 35A to 35D. In each of the weight members 27, the through hole 35A is arranged at an angular position 90° or approximately 90° away in the circumferential direction from each of the through holes 35B and 35D, and is arranged at an angular position 180° or approximately 180° away in the circumferential direction from the through hole 35C. Also, in each of the weight members 27, the through hole 35B is arranged at an angular position 90° or approximately 90° away in the circumferential direction from each of the through holes 35A and 35C, and is arranged at an angular position 180° or approximately 180° away in the circumferential direction from the through hole 35D.

[0032] As shown in FIGS. 3 to 6 and the like, in a state where two or more of the plurality of weight members 27 are connected to the hook portion 21, in the two or more weight members 27 connected to the hook portion 21, the through holes 35A are arranged without shifting or hardly shifting with respect to each other in the direction around the central axis C, and the through holes 35B are arranged without shifting or hardly shifting with respect to each other in the direction around the central axis C. Then, in the two or more weight members 27 connected to the hook portion 21, the through holes 35C are arranged without shifting or hardly shifting with respect to each other in the direction around the central axis C, and the through holes 35D are arranged without shifting or hardly shifting with respect to each other in the direction around the central axis C.

[0033] As shown in FIG. 2 and the like, when only one weight member 27A is connected to the hook portion 21, a connecting pin 36 is inserted into each of the through hole 31 of the connecting member 25 and the through holes 35A and 35C of the weight member 27A. Thereby, the weight member 27A is attached to the connecting member 25, and the weight member 27A is connected to the hook portion 21 with the connecting member 25 interposed therebetween. Also, in a state where the weight member 27A is connected to the hook portion 21, the connecting pin 36 extends along the width direction of the auxiliary hook 13.

[0034] Further, as shown in FIG. 3 and the like, when connecting another weight member 27B to the hook portion 21 from the state where one weight member 27A is connected to the hook portion 21, a connecting pin 37 is inserted into each of the through hole 32 of the connecting member 25 and the through holes 35B and 35D of the weight member 27B. Thereby, the weight member 27B is attached to the connecting member 25, and the weight member 27B is connected to the hook portion 21 with the connecting member 25 interposed therebetween. Further, in the state where the weight member 27B is connected to the hook portion 21, the connecting pin 37 extends along the depth direction of the auxiliary hook 13.

[0035] In an example of FIGS. 2 to 6, in a state where the additional connecting member 26 is not attached to the connecting member 25, that is, in a state where the additional connecting member 26 is not connected to the hook portion 21, one or two weight members 27 can be connected to the hook portion 21 with the connecting member 25 interposed therebetween. Further, in a state where the additional connecting member 26 is not connected to the hook portion 21, the supplementary winding rope 12, which is a rope for suspension, is connected to the connecting member 25 of the rope connecting portion 23 at the through hole 33. Therefore, in a state where the weight portion 22 is separated from the hook portion 21, a state where only one weight member 27A is connected to the hook portion 21, and a state where only two weight members 27A and 27B are connected to the hook portion 21, the supplementary winding rope 12 can be connected to the rope connecting portion 23 at the through hole 33.

[0036] Further, as shown in FIG. 4 and the like, at the rope connecting portion 23, the additional connecting member 26 is detachably attached to the connecting member 25. Therefore, the additional connecting member 26 is connected to the hook portion 21 with the connecting member 25 interposed therebetween and is separably connected to the hook portion 21. Further, through holes 41, 42, and 43 are formed in the additional connecting member 26. Each of the through holes 41 to 43 penetrates the additional connecting member 26. In a state where the additional connecting member 26 is connected to the hook portion 21, each of the through holes 41 to 43 penetrates the additional connecting member 26 along the depth direction of the auxiliary hook 13. Further, in a state where the additional connecting member 26 is connected to the hook portion 21, in the additional connecting member 26, the through holes 41, 42, and 43 are arranged in this order from the lower side in the height direction.

[0037] When connecting the additional connecting member 26 to the hook portion 21, a connecting pin 45 is inserted into each of the through hole 33 of the connecting member 25 and the through hole 41 of the additional connecting member 26. Thereby, the additional connecting member 26 is attached to the connecting member 25, and the additional connecting member 26 is connected to the hook portion 21 with the connecting member 25 in between. Further, in a state where the additional connecting member 26 is connected to the hook portion 21, the connecting pin 45 extends along the depth direction of the auxiliary hook 13. Further, in an example of FIGS. 2 to 6, only when the additional connecting member 26 is connected to the hook portion 21, all of the three weight members 27A to 27C can be connected to the hook portion 21.

[0038] As shown in FIGS. 5 and 6 and the like, when further connecting one weight member 27C to the hook portion 21 from a state where two weight members 27A, 27B and an additional connecting member 26 are connected to the hook portion 21, a connecting pin 46 is inserted into each of the through hole 42 of the additional connecting member 26 and the through holes 35B, 35D of the weight member 27C. Thereby, the weight member 27C is attached to the additional connecting member 26, and the weight member 27C is connected to the hook portion 21 with the additional connecting member 26 and the connecting member 25 in between. Further, in a state where the weight member 27C is connected to the hook portion 21, the connecting pin 46 extends along the depth direction of the auxiliary hook 13.

[0039] In an example of FIGS. 2 to 6, in a state where the additional connecting member 26 is attached to the connecting member 25, that is, in a state where the additional connecting member 26 is connected to the hook portion 21, the supplementary winding rope 12, which is a rope for suspension, is connected to the additional connecting member 26 of the rope connecting portion 23 at the through hole 43. For this reason, in a state where all of the three weight members 27A to 27C are connected to the hook portion 21, the supplementary winding rope 12 can be connected to the rope connecting portion 23 at the through hole 43.

[0040] FIG. 7 shows, in a perspective view, the configuration of the rear end portion of the traveling vehicle body 2 in the crane 1 according to the embodiment. In FIG. 7, the directions indicated by the arrow Y1 and the arrow Y2 are the width direction of the traveling vehicle body 2. As shown in FIGS. 1 and 7 and the like, a storage bracket 50 is attached to the traveling vehicle body 2. In an example such as FIG. 7, a base frame 51 is provided at the rear end portion of the traveling vehicle body 2, and the storage bracket 50 is attached to the base frame 51 of the traveling vehicle body 2. For this reason, in an example such as FIGS. 1 and 7, the storage bracket 50 is arranged at the rear end portion of the traveling vehicle body 2.

[0041] FIG. 8 shows, in a perspective view, the configuration of the storage bracket 50. As shown in FIG. 8 and the like, in the storage bracket 50, a front-rear direction (the directions indicated by the arrow X3 and the arrow X4), a width direction (the directions indicated by the arrow Y3 and the arrow Y4) that intersects (is orthogonal or substantially orthogonal) with respect to the front-rear direction, and a height direction (the directions indicated by the arrow Z3 and the arrow Z4) that intersects (is orthogonal or substantially orthogonal) with respect to both the front-rear direction and the width direction are defined. Further, in the storage bracket 50, one side in the front-rear direction is the front side (arrow X3 side), and the side opposite to the front side in the front-rear direction is the rear side (arrow X4 side). And in the storage bracket 50, one side in the vertical direction is the upper side (arrow Z3 side), and the side opposite to the upper side in the height direction is the lower side (arrow Z4 side).

[0042] In an example such as FIG. 7, the storage bracket 50 is attached to the base frame 51 of the traveling vehicle body 2 in a state where the height direction is along the vertical direction and the front-rear direction is along the front-rear direction of the traveling vehicle body 2. And in a state where the storage bracket 50 is attached to the base frame 51, the width direction of the storage bracket 50 is along the width direction of the traveling vehicle body 2. Also, in a state where the storage bracket 50 is attached to the base frame 51, the upper side in the height direction of the storage bracket 50 coincides or substantially coincides with the vertically upper side, and the lower side in the height direction of the storage bracket 50 coincides or substantially coincides with the vertically lower side. And in a state where the storage bracket 50 is attached to the base frame 51, the front side of the storage bracket 50 coincides or substantially coincides with the front side of the traveling vehicle body 2, and the rear side of the storage bracket 50 coincides or substantially coincides with the rear side of the traveling vehicle body 2.

[0043] As shown in FIG. 8 and the like, a storage cavity 52 is formed inside the storage bracket 50. The hook portion 21 of the auxiliary hook (hook) 13 can be stored in the storage cavity 52 of the storage bracket 50. In FIGS. 1 and 7, for example, a state where the crane 1 is traveling is shown, and the hook portion 21 of the auxiliary hook 13 is stored in the storage cavity 52 of the storage bracket 50.

[0044] FIGS. 9 to 12 show a state in which the hook portion 21 of the auxiliary hook 13 is stored in the storage cavity 52 of the storage bracket 50 in the embodiment. FIGS. 9 and 11 show perspective views, and FIGS. 10 and 12 show perspective views of the storage bracket 50 cut along a cross section orthogonal or substantially orthogonal to the width direction. As shown in FIGS. 8 to 12 and the like, the storage bracket 50 includes a bottom plate portion 53, a rear plate portion 55, a pair of side plate portions 56 and 57, and an inclined plate portion 58.

[0045] In the storage bracket 50, the bottom plate portion 53 covers the storage cavity 52 from the lower side in the height direction. Also, in the storage bracket 50, the side plate portion 56 covers the storage cavity 52 from one side in the width direction, and the side plate portion 57 covers the storage cavity 52 from the side opposite to the side plate portion 56 in the width direction. Therefore, the pair of side plate portions 56 and 57 face each other across the storage cavity 52 in the width direction of the storage bracket 50.

[0046] Further, in the storage bracket 50, the rear plate portion 55 covers the storage cavity 52 from the rear side. In a state where the storage bracket 50 is attached to the base frame 51, the base frame 51 covers the storage cavity 52 from the front side of the storage bracket 50 (the front side of the traveling vehicle body 2). Therefore, in a state where the storage bracket 50 is attached to the base frame 51, the base frame 51 faces the rear plate portion 55 across the storage cavity 52 in the front-rear direction of the storage bracket 50.

[0047] Also, in the storage bracket 50, the storage cavity 52 opens upward in the height direction and is not covered from above in the height direction. In the storage bracket 50, the dimension of the storage cavity 52 along the width direction is smaller than each of the dimension of the storage cavity 52 along the height direction and the dimension of the storage cavity 52 along the front-rear direction. For this reason, in the state where the storage bracket 50 is attached to the base frame 51, the distance between the pair of side plate portions 56, 57 is smaller than each of the distance between the rear plate portion 55 and the base frame 51 and the distance from the opening of the storage cavity 52 upward in the height direction to the bottom plate portion 53.

[0048] Also, in the storage bracket 50, the inclined plate portion 58 extends rearward from the bottom plate portion 53 to the rear plate portion 55 and extends along the width direction between the pair of side plate portions 56, 57. And in the inclined plate portion 58, the front end is connected to the bottom plate portion 53 and the rear end is connected to the rear plate portion 55. The inclined plate portion 58 extends in a state of being inclined with respect to the height direction and the front-rear direction of the storage bracket 50. The inclined plate portion 58 is inclined with respect to the height direction and the front-rear direction of the storage bracket 50 such that the rearward portion is located more upward in the height direction.

[0049] The storage bracket 50 includes a pair of protruding plate portions 61, 62 and an annular portion 63. The protruding plate portion 61 is connected to the upper end of the side plate portion 56. And in the storage bracket 50, the protruding plate portion 61 extends outward in the width direction from the upper end of the side plate portion 56 and protrudes outward in the width direction with respect to the side plate portion 56. Also, the protruding plate portion 62 is connected to the upper end of the side plate portion 57. And in the storage bracket 50, the protruding plate portion 62 extends outward in the width direction from the upper end of the side plate portion 57 and protrudes outward in the width direction with respect to the side plate portion 57.

[0050] The annular portion 63 is circular or substantially circular when viewed from the height direction. In the storage bracket 50, the annular portion 63 is connected to the protruding plate portions 61 and 62 from the upper side in the height direction. In the storage bracket 50, a space 65 is formed on the inner peripheral side of the annular portion 63, and the space 65 is surrounded by the annular portion 63 over the entire circumference. Also, in the storage bracket 50, the storage cavity 52 communicates with the space 65 through an opening toward the upper side in the height direction. And in the state where the storage bracket 50 is attached to the base frame 51, the storage cavity 52 communicates with the outside of the storage bracket 50 through the space 65 on the inner peripheral side of the annular portion 63.

[0051] Also, in each of the pair of protruding plate portions 61 and 62, a groove portion 66 is formed on the surface facing the upper side in the height direction of the storage bracket 50. In each of the protruding plate portions 61 and 62, on the surface facing the upper side in the height direction of the storage bracket 50, the groove portion 66 is recessed downward in the height direction. Also, the groove portions 66 of the respective protruding plate portions 61 and 62 are located on the inner peripheral side with respect to the annular portion 63 and are located within the range surrounded by the annular portion 63.

[0052] In the protruding plate portion 61, the groove portion 66 is formed in a concave shape that is recessed from the upper end of the side plate portion 56 toward the outside in the width direction of the storage bracket 50. Also, in the protruding plate portion 62, the groove portion 66 is formed in a concave shape that is recessed from the upper end of the side plate portion 57 toward the outside in the width direction of the storage bracket 50. For this reason, in each of the protruding plate portions 61 and 62, the groove portion 66 is recessed from the opening edge of the opening of the storage cavity 52 toward the outside in the width direction of the storage bracket 50.

[0053] In the groove portions 66 of the respective protruding plate portions 61 and 62, a concave portion 67 that is recessed from the opening edge of the opening of the storage cavity 52 toward the outside in the width direction of the storage bracket 50, and a concave portion 68 that is further recessed from the bottom of the concave portion 67 toward the outside in the width direction of the storage bracket 50 are formed. For this reason, in the groove portions 66 of the respective protruding plate portions 61 and 62, a two-stage concave shape that is recessed in two stages toward the outside in the width direction of the storage bracket 50 is formed by the concave portions 67 and 68.

[0054] In this embodiment, the connecting body of the hook portion 21 and the connecting member 25 is inserted into the storage bracket 50 from above the storage bracket 50, so that the hook portion 21 is stored in the storage cavity 52. At this time, the connecting body of the hook portion 21 and the connecting member 25 is inserted into the storage bracket 50 from the hook portion 21, and the hook portion 21 is inserted into the storage cavity 52 through the space 65 on the inner peripheral side of the annular portion 63.

[0055] In a state where the hook portion 21 is stored in the storage cavity 52, the upper side (arrow H1 side) in the height direction of the auxiliary hook 13 coincides with or substantially coincides with the upper side (arrow X3 side) in the height direction of the storage bracket 50, and the lower side (arrow H2 side) in the height direction of the auxiliary hook 13 coincides with or substantially coincides with the lower side (arrow X4 side) in the height direction of the storage bracket 50. Therefore, in a state where the storage bracket 50 is attached to the traveling vehicle body 2 and the hook portion 21 is stored in the storage cavity 52, the upper side in the height direction of the auxiliary hook 13 coincides with or substantially coincides with the vertically upper side (arrow X1 side), and the lower side (arrow H2 side) in the height direction of the auxiliary hook 13 coincides with or substantially coincides with the vertically lower side.

[0056] Then, in a state where the width direction (the directions indicated by arrows W1 and W2) of the auxiliary hook 13 is along the front-rear direction (the directions indicated by arrows X3 and X4) of the storage bracket 50, and the depth direction (the directions indicated by arrows D1 and D2) of the auxiliary hook 13 is along the width direction (the directions indicated by arrows Y3 and Y4) of the storage bracket 50, the hook portion 21 is stored in the storage cavity 52. Therefore, in a state where the storage bracket 50 is attached to the traveling vehicle body 2 and the hook portion 21 is stored in the storage cavity 52, the width direction of the auxiliary hook 13 is along the front-rear direction (the directions indicated by arrows X1 and X2) of the traveling vehicle body 2, and the depth direction of the auxiliary hook 13 is along the front-rear direction (the directions indicated by arrows Y1 and Y2) of the traveling vehicle body 2.

[0057] Further, in the storage cavity 52, in a state where the folding position B1 with respect to the central axis C of the supplementary hook 13 is located on the front side of the storage bracket 50 (the front side of the traveling vehicle body 2), and the tip E2 is located on the rear side of the storage bracket 50 (the rear side of the traveling vehicle body 2) with respect to the central axis C, the hook portion 21 is stored. For this reason, when storing the hook portion 21 in the storage cavity 52, the hook portion 21 is inserted into the storage cavity 52 in a state where the tip E2 is located on the rear side of the storage bracket 50 (the rear side of the traveling vehicle body 2) with respect to the folding position B1 and the central axis C.

[0058] Here, in the storage bracket 50, as described above, the dimension of the storage cavity 52 along the width direction is smaller than the dimension of the storage cavity 52 along the front-rear direction. For this reason, the hook portion 21 can be inserted into the storage cavity 52 only when the width direction of the supplementary hook 13 is along the front-rear direction of the storage bracket 50 and the depth direction of the supplementary hook 13 is along the width direction of the storage bracket 50.

[0059] Further, in the storage bracket 50, as described above, the inclined plate portion 58 is provided adjacent to the rear side of the bottom plate portion 53. For this reason, by inserting the hook portion 21 into the storage cavity 52 in a state where the tip E2 is located on the rear side of the storage bracket 50 with respect to the folding position B1 and the central axis C, the hook portion 21 is stored in the storage cavity 52 without protruding upward in the height direction from the storage cavity 52. For example, when the hook portion 21 is inserted into the storage cavity 52 in a state where the tip E2 is located on the front side of the storage bracket 50 with respect to the folding position B1 and the central axis C, the hook portion 21 protrudes upward in the height direction from the storage cavity 52, and the hook portion 21 is not properly stored in the storage cavity 52.

[0060] Also, when the hook portion 21 is stored in the storage cavity 52 as described above, the connecting member 25 of the rope connecting portion 23 abuts on the respective groove portions 66 of the protruding plate portions 61 and 62 from the upper side in the height direction of the storage bracket 50. And when the hook portion 21 is stored in the storage cavity 52, the connecting member 25 of the rope connecting portion 23 engages with the respective groove portions 66 of the protruding plate portions 61 and 62. For this reason, when the hook portion 21 is stored in the storage cavity 52, the movement of the connecting member 25 in the front-rear direction and the width direction of the storage bracket 50 is restricted by the concave portions 68 of the respective groove portions 66 of the protruding plate portions 61 and 62. Thereby, the movement of the hook portion 21 stored in the storage cavity 52 in the front-rear direction and the width direction of the storage bracket 50 is also restricted. Therefore, the hook portion 21 of the auxiliary hook 13 is stored in the storage cavity 52 inside the storage bracket 50 in a state of being positioned in the front-rear direction and the width direction of the storage bracket 50.

[0061] When the hook portion 21 is stored in the storage cavity 52 as described above, the connecting member 25 is disposed in the space on the inner peripheral side of the annular portion 63. Also, when the hook portion 21 is stored in the storage cavity 52, the connecting member 25 protrudes upward in the height direction of the storage bracket 50 with respect to the annular portion 63. And when the hook portion 21 is stored in the storage cavity 52, each of the through holes 31 to 33 formed in the connecting member 25 is positioned above the annular portion 63 in the height direction of the storage bracket 50.

[0062] Since the hook portion 21 is stored as described above, when the hook portion 21 is stored in the storage cavity 52, only one weight member 27A can be attached to the connecting member 25 as described above, and two weight members 27A and 27B can be attached to the connecting member 25 as described above. For this reason, with respect to the hook portion 21 stored in the storage cavity 52, only one weight member 27A can be connected, and two weight members 27A and 27B can be connected. With respect to the hook portion 21 stored in the storage cavity 52, one or two weight members 27 are connected via the connecting member 25 and are separably connected.

[0063] Also, when the hook portion 21 is stored in the storage cavity 52, the additional connection member 26 can be attached to the connection member 25 as described above. Therefore, even when the hook portion 21 is stored in the storage cavity 52, by attaching the additional connection member 26 to the connection member 25, it becomes possible to attach all of the three weight members 27A to 27C to the rope connection portion 23. For this reason, it is possible to connect all of the three weight members 27A to 27C to the hook portion 21 stored in the storage cavity 52. With respect to the hook portion 21 stored in the storage cavity 52, the three weight members 27 are connected via the rope connection portion 23 and are separably connected.

[0064] As described above, in the present embodiment, the weight portion 22 can be connected to the hook portion 21 stored in the storage cavity 52. With respect to the hook portion 21 stored in the storage cavity 52, the weight portion 22 is connected via the rope connection portion 23 and is separably connected. In FIGS. 9 and 10, a state in which the weight portion 22 is separated from the hook portion 21 stored in the storage cavity 52, that is, a state in which none of the three weight members 27A to 27C is connected to the hook portion 21 stored in the storage cavity 52, is shown. And in FIGS. 11 and 12, a state in which all of the three weight members 27A to 27C are connected to the hook portion 21 stored in the storage cavity 52 is shown.

[0065] As described above, in the supplementary hook (hook) 13 of the present embodiment, the weight portion 22 is detachably connected to the hook portion 21. And at the rope connection portion 23 to which the hook portion 21 is connected, in each of the state where the weight portion 22 is separated from the hook portion 21 and the state where the weight portion 22 is connected to the hook portion 21, the supplementary winding rope 12 which is a rope for suspension can be connected. Thereby, in one supplementary hook 13, it becomes possible to change the weight to be suspended in the state where the weight portion 22 is separated from the hook portion 21 and the state where the weight portion 22 is connected to the hook portion 21. Therefore, without preparing a plurality of types of hooks having different weights from each other, in response to situations including the weight of the suspended load, the undulating posture of the boom during work, and the type of the crane 1 (construction machine) used, etc., in one supplementary hook 13, the weight to be suspended can be adjusted.

[0066] Also, in the present embodiment, the weight portion 22 is separable into a plurality of weight members 27, and the number of weight members 27 connected to the hook portion 21 can be changed. And at the rope connection portion 23, regardless of the number of weight members 27 connected to the hook portion 21, in each of the states where one or more weight members 27 are connected to the hook portion 21, the supplementary winding rope 12 which is a rope for suspension can be connected. For this reason, by adjusting the number of weight members 27 connected to the hook portion 21, in one supplementary hook 13, the weight to be suspended can be adjusted among three or more weights. Thereby, in response to situations including the weight of the suspended load, the undulating posture of the boom during work, and the type of the crane 1 (construction machine) used, etc., in one supplementary hook 13, the weight to be suspended can be adjusted more finely.

[0067] As described above, in this embodiment, in one auxiliary hook 13, the weight to be suspended can be adjusted among a plurality of weights. Therefore, the weight to be suspended can be appropriately adjusted with one auxiliary hook 13 to a weight corresponding to the situation including the weight of the suspended load, the pitching posture of the boom during work, and the type of the crane 1 used. Further, by increasing the number of weight members 27 connected to the hook portion 21, etc., the weight to be suspended by the auxiliary hook 13 is increased, so that the weight of the suspended load lifted using the auxiliary hook 13 can be increased.

[0068] In one auxiliary hook 13, since the weight to be suspended can be adjusted among a plurality of weights, the number of auxiliary hooks 13 used in the work by the crane 1 can be reduced. Thereby, the number of auxiliary hooks 13 mounted on the traveling vehicle body 2 of the crane 1 can be reduced when traveling, such as when moving between work sites. Therefore, it is possible to reduce the vehicle weight of the crane 1 when traveling on a public road or the like.

[0069] Further, in this embodiment, the storage bracket 50 is attached to the traveling vehicle body 2, and the hook portion 21 of the auxiliary hook 13 can be stored inside the storage bracket 50 in a positioned state. Therefore, it is possible to travel with the hook portion 21 of the auxiliary hook 13 appropriately stored when traveling, such as when moving between work sites. Further, in this embodiment, the weight portion 22 of the auxiliary hook 13 is separably connected to the hook portion 21 stored in the storage bracket 50. Thereby, it is possible to appropriately travel in a state where the weight portion 22 is connected to the hook portion 21 stored in the storage bracket 50 when traveling, such as when moving between work sites.

[0070] In addition, in the above-described embodiments and the like, the configuration in which the weight portion 22 is separable into three weight members 27A to 27C has been mainly described, but the present invention is not limited thereto. The weight portion 22 may be separable into two weight members 27, or may be separable into four or more weight members 27. However, in any case, regardless of the number of weight members 27 connected to the hook portion 21, in each state where one or more weight members 27 are connected to the hook portion 21, the supplementary winding rope 12, which is a suspension rope, can be connected to the rope connection portion 23. Thereby, the same operations and effects as those in the above-described embodiments and the like are achieved.

[0071] Further, the weight portion 22 may be composed of only one weight member 27. Also in this case, the weight portion 22 is separably connected to the hook portion 21. And in each of the state where the weight portion 22 is separated from the hook portion 21 and the state where the weight portion 22 is connected to the hook portion 21, the supplementary winding rope 12, which is a suspension rope, can be connected to the rope connection portion 23. Thereby, the same operations and effects as those in the above-described embodiments and the like are achieved.

[0072] In addition, in the above-described embodiments and the like, the supplementary hook 13 has been mainly described, but the above-described configuration may be applied to hooks other than the supplementary hook 13. For example, in the work using the crane 1, the main hook is suspended from the top sheave disposed at the front end of the boom 7 via the main winding rope, which is a suspension rope. In the embodiments and the like, the above-described configuration of the supplementary hook 13 may also be applied to the main hook. In this case, the main hook includes a hook portion, a weight portion, and a rope connection portion, and the weight portion is separably connected to the hook portion. And the rope connection portion can connect the main winding rope, which is a suspension rope, to the rope connection portion in each of the state where the hook portion is connected and the weight portion is separated from the hook portion and the state where the weight portion is connected to the hook portion.

[0073] In addition, in the above-described embodiments and the like, the crane 1 has been mainly described as a construction machine, but the above-described configuration of the supplementary hook 13 may also be applied to hooks used in construction machines other than the crane 1.

[0074] Note that the invention of the present application is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof at the implementation stage. Also, each embodiment may be implemented in appropriate combination as much as possible, and in that case, the combined effects can be obtained. Furthermore, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriate combinations of a plurality of disclosed constituent elements.

Description of Reference Numerals

[0075] 1... Crane, 2... Traveling vehicle body, 3... Slewing body, 7... Boom, 12... Supplementary winding rope, 13... Supplementary hook, 21... Hook portion, 22... Weight portion, 23... Rope connection portion, 25... Connection member, 26... Additional connection member, 27(27A to 27C)... Weight member, 50... Storage bracket.

Claims

1. A hook portion capable of hooking a hooked portion on the suspended load side, A weight portion separably connected to the hook portion, In each of the state where the hook portion is connected and the weight portion is separated from the hook portion, and the state where the weight portion is connected to the hook portion, a rope connection portion to which a suspension rope can be connected, A hook for construction machinery, comprising the above.

2. The weight portion includes a plurality of weight members separable from each other, In the weight portion, the number of weight members connected to the hook portion is variable, In the rope connection portion, regardless of the number of the weight members connected to the hook portion, in each state where one or more of the weight members are connected to the hook portion, the suspension rope can be connected, The hook according to Claim 1.

3. The hook according to Claim 1 or 2, The suspension rope connectable to the rope connection portion of the hook, A boom capable of suspending the hook via the rope from the front end portion, A slewing body to which the rear end portion of the boom is attached and the boom can be raised and lowered, A traveling vehicle body connected to the slewing body from vertically above and the slewing body can rotate about a vertical rotation axis along the vertical direction, A construction machine, comprising the above.

4. The construction machine according to Claim 3, further comprising a storage bracket attached to the traveling vehicle body and capable of storing the hook portion of the hook therein in a positioned state.

5. The construction machine according to Claim 4, wherein the weight portion of the hook is separably connected to the hook portion stored in the storage bracket.

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