Rope inspection device and work machine equipped with same

Abstract

To provide a rope inspection device which can accurately detect deterioration of a rope used in a work machine, and to provide the work machine including the rope inspection device.SOLUTION: A rope inspection device 7 includes: a rope deterioration detector 70; an idler sheave 18S; and a support unit 7S. The rope deterioration detector 70 can inspect a deterioration state of a rope 52. The idler sheave 18S has an outer peripheral surface on which the rope 52 drawn from a winch hooks. The support unit 7S has: a support medium 72 which rotatably supports the idler sheave 18S; and a detector support part 73 which supports the rope deterioration detector 70 so that the rope deterioration detector 70 can inspect a portion, which is opposite to the winch when viewed from the idler sheave 18S, of the rope 52. The rope inspection device 7 is attached to a gib 18.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rope inspection device and a work machine equipped with the same. [Background technology]

[0002] Cranes capable of lifting a load have been known as work machines. The crane includes a machine body, a hoisting structure capable of raising and lowering a load relative to the machine body, a load rope suspended from the tip of the hoisting structure and connected to the load, and a load winch for winding and unwinding the load rope. The crane also includes a hoisting rope and a hoisting winch. The hoisting rope is connected to the tip of the hoisting structure via a guy link or the like, and when the hoisting winch winds and unwinds the hoisting rope, the hoisting structure rises and falls relative to the machine body. With such cranes, the ropes can deteriorate and become damaged over long periods of operation.

[0003] Patent Document 1 discloses a technology in which the hoisting rope is coated with paint and the color and peeling of the paint are photographed using a camera fixed to the top of the gantry, thereby determining the lifespan of the rope. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-117989 Summary of the Invention [Problem to be solved by the invention]

[0005] The technology described in Patent Document 1 has the problem that it is difficult to accurately detect rope deterioration because the distance between the camera and the rope fluctuates during crane operation, particularly depending on the elevation of the undulating body.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a rope inspection device that can accurately detect deterioration of ropes used in work machines, and a work machine equipped with the same. [Means for solving the problem]

[0007] The present invention provides a rope inspection device that is attached to a work machine having a body, a hoisting body that can be raised and lowered relative to the body, a winch, and a rope that is pulled out from the winch. The rope inspection device includes a support unit that has: a rope inspector that can inspect the deterioration state of the rope; a sheave that has an outer circumferential surface around which the rope pulled out from the winch is hung; a sheave support part that rotatably supports the sheave; an inspector support part that supports the rope inspector so that the rope inspector can inspect the portion of the rope that is on the opposite side of the winch from the sheave; and an attachment part that is attached to the hoisting body.

[0008] According to this configuration, the support unit supports the sheave and the rope inspector so that the rope inspector can inspect the portion of the rope that has passed through the outer periphery of the sheave. Therefore, the position of the rope pulled out from the winch is stably maintained by the sheave, allowing the rope inspector to accurately detect deterioration of the rope. Furthermore, because the support unit is attached to the hoisting body, even if the hoisting body rises and falls relative to the machine body, the relative positions of the hoisting body, the sheave, and the rope inspector are maintained, allowing for stable rope inspection.

[0009] In the above configuration, the support unit may further include an inspector angle adjustment unit that can adjust the relative angle of the rope inspector with respect to the undulating body.

[0010] According to this configuration, the inspection device angle adjustment unit can adjust the relative angle of the rope inspection device with respect to the undulating body, so that the rope deterioration can be inspected in a stable posture corresponding to various positions on the undulating body.

[0011] In the above configuration, the support unit may further include an inspector height adjustment section that can adjust the relative height of the rope inspector with respect to the undulating body.

[0012] According to this configuration, the inspection device height adjustment unit can adjust the relative height of the rope inspection device with respect to the undulating body, so that the rope deterioration can be inspected in a stable posture corresponding to various positions on the undulating body.

[0013] In the above configuration, the elevation body may have a first member, a second member, and an elevation body connecting pin connecting the first member and the second member, and the support unit may have a fixing plate that includes a protrusion extending parallel to the elevation body connecting pin and is placed on the elevation body, a first hole that receives the protrusion of the fixing plate, and a second hole that receives the elevation body connecting pin connecting the first member and the second member, and a fixing link that fixes the fixing plate to the elevation body.

[0014] According to this configuration, the rope inspection device can be stably attached to the undulating body by utilizing the connection pin that connects the first member and the second member of the undulating body.

[0015] In the above configuration, the fixing plate may further include a restricting portion that restricts rotation of the fixing link around the protrusion.

[0016] According to this configuration, the restricting portion of the fixing plate stably maintains the posture of the fixing link, thereby making it possible to stably maintain the relative position of the rope inspection device with respect to the undulating body.

[0017] In the above configuration, the undulating body may have a first member, a second member, and a undulating body connecting pin that connects the first member and the second member, and the support unit may have a fixing plate placed on the undulating body, and a fixing member that has a hole portion that receives the undulating body connecting pin that connects the first member and the second member, and is fixed to the fixing plate by a plurality of fastening members.

[0018] According to this configuration, the rope inspection device can be stably attached to the undulating body by utilizing the connection pin that connects the first member and the second member of the undulating body.

[0019] In the above configuration, the support unit may further include a sheave rotating shaft that rotatably supports the sheave, a pair of support walls that respectively support both ends of the sheave rotating shaft, and a plurality of spacers that are attached to the sheave rotating shaft so as to be respectively interposed between the pair of support walls and the sheave, and that regulate the position of the sheave in the axial direction of the sheave rotating shaft.

[0020] According to this configuration, the position of the sheave in the width direction can be stabilized, and the rope can be stably inspected for deterioration.

[0021] In the above configuration, the support unit may further include a sheave height adjustment section that can adjust the relative height of the sheave with respect to the undulating body.

[0022] According to this configuration, the height of the sheave can be adjusted in accordance with the specifications of the work machine, and then the rope can be inspected for deterioration.

[0023] In the above configuration, the sheave height adjustment unit may be capable of adjusting the height of the sheave and the rope inspection device together with respect to the undulating body.

[0024] According to this configuration, when adjusting the height of the sheave in accordance with the specifications of the work machine, deterioration of the rope can be stably inspected without significantly changing the relative position between the sheave and the rope inspector.

[0025] The present invention also provides a work machine comprising a machine body, a hoisting body that can be raised and lowered relative to the machine body, a winch, a rope that is pulled out from the winch, and any one of the rope inspection devices described above that is attached to the hoisting body. [Effects of the Invention]

[0026] According to the present invention, it is possible to provide a rope inspection device that can accurately detect deterioration of a rope used in a work machine, and a work machine equipped with the same. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a side view of a crane according to a first embodiment of the present invention. FIG. [Figure 2] 1 is a side view of a crane rope inspection device according to a first embodiment of the present invention. [Figure 3] 1 is a plan view of a crane rope inspection device according to a first embodiment of the present invention. [Figure 4] 1 is a rear view of a crane rope inspection device according to a first embodiment of the present invention. FIG. [Figure 5] 1 is a rear view showing a state in which the rope inspection device according to the first embodiment of the present invention is attached to a hoisting body of a crane. [Figure 6] FIG. 6 is a side view of a crane rope inspection device according to a second embodiment of the present invention. [Figure 7] FIG. 6 is a side view of a crane rope inspection device according to a second embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view of a fixing plate of a crane rope inspection device according to a third embodiment of the present invention. [Figure 9] FIG. 10 is a side view of a crane rope inspection device according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a plan view of a crane rope inspection device according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a rear view of a crane rope inspection device according to a third embodiment of the present invention. [Figure 12] FIG. 10 is a side view of a crane rope inspection device according to a fourth embodiment of the present invention. [Figure 13] FIG. 10 is a plan view of a crane rope inspection device according to a fourth embodiment of the present invention. [Figure 14]FIG. 10 is a rear view of a crane rope inspection device according to a fourth embodiment of the present invention. [Figure 15] FIG. 10 is a rear view of a crane rope inspection device according to a fifth embodiment of the present invention. [Figure 16] FIG. 10 is a plan view of a crane rope inspection device according to a fifth embodiment of the present invention. [Figure 17] FIG. 10 is a rear view of a crane rope inspection device according to a fifth embodiment of the present invention. [Figure 18] FIG. 10 is an exploded assembly view of a spacer of a crane rope inspection device according to a fifth embodiment of the present invention. [Figure 19] FIG. 10 is a side view of a crane rope inspection device according to a sixth embodiment of the present invention. [Figure 20] FIG. 10 is a rear view of a crane rope inspection device according to a sixth embodiment of the present invention. [Figure 21] FIG. 10 is a rear view of a crane rope inspection device according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] First Embodiment Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view of a crane 1 (work machine) according to a first embodiment of the present invention. Note that, although directions such as "up," "down," "left," "right," "front," and "rear" are shown in each drawing hereinafter, these directions are shown for the convenience of explaining the structure of the crane 1 according to each embodiment, and do not limit the direction of movement or the manner of use of the crane according to the present invention.

[0029] The crane 1 includes an upper rotating body 12, a lower running body 14, a boom 16, a jib 18, a lower spreader 19A, an upper spreader 19B, a pair of left and right boom guy lines 20, a gantry 21, a boom hoist rope 22, a boom hoist winch 30, a main hoisting winch 34, an auxiliary hoisting winch 35, a counterweight 40, and a pair of left and right boom backstops 45. The crane 1 also includes ropes 51 and 52, a main hook 53, an auxiliary hook 54, a strut 55, a pair of left and right strut guy lines 56, and a pair of left and right jib guy lines 57. In the following explanation, the left and right members of the pair have the same structure, so only the structure of one of the left and right members will be described.

[0030] The upper rotating body 12 constitutes the crane body (machine body) of the crane 1, and is supported by the lower traveling body 14 so as to be able to rotate about a rotation center axis extending in the vertical direction. The lower traveling body 14 is able to travel on a traveling surface such as the ground G.

[0031] The boom 16 is supported on the upper rotating structure 12 so that it can be raised and lowered. Specifically, the boom 16 has a boom base end 16P and a boom tip end 16Q. The boom base end 16P is supported on the upper rotating structure 12 so that it can rotate in the raising and lowering direction around a horizontal boom rotation center axis. The boom tip end 16Q is located on the opposite side of the boom base end 16P in the longitudinal direction. In this embodiment, a boom foot 16S provided on the boom base end 16P is rotatably supported on a pivot support (not shown) of the upper rotating structure 12. As an example, the boom 16 is a so-called lattice type, which is formed by connecting multiple boom members to each other. The structure of the boom 16 is not limited to this, and may be a box-shaped structure or a telescopic structure. Furthermore, the position where the boom 16 is supported is not limited to the front side of the upper rotating structure 12, but may also be the rear side. A pair of left and right backstops 45 is supported on the back surface of the boom 16. These backstops 45 come into contact with the upper rotating body 12 when the boom 16 is in an upright position (working position of the crane 1). This contact prevents the boom 16 from being blown backward by strong winds or the like.

[0032] The jib 18 is supported on the boom tip 16Q of the boom 16 so as to be rotatable in the hoisting direction around a horizontal rotation center axis. The jib 18 has a jib base end 18P and a jib tip 18Q. The jib 18, together with the boom 16, constitutes the hoisting structure of the present invention. The hoisting structure can be raised and lowered relative to the upper rotating body 12.

[0033] The lower spreader 19A is connected to the tip of the gantry 21 and has a lower sheave block (not shown). The lower sheave block has a plurality of sheaves arranged in the width direction (left and right direction).

[0034] The upper spreader 19B is disposed a predetermined distance in front of the lower spreader 19A. The upper spreader 19B is connected to the boom tip 16Q via a boom guy line 20. The upper spreader 19B has an upper sheave block (not shown). The upper sheave block has multiple sheaves arranged in the width direction (left-right direction).

[0035] The pair of left and right boom guy lines 20 are spaced apart from each other in the left-right direction perpendicular to the plane of the paper in Figure 1. The rear end of each boom guy line 20 is connected to the upper spreader 19B, and the front end of each boom guy line 20 is detachably connected to the boom tip 16Q. The boom guy lines 20 may have any structure, such as guy links (metal plates), guy ropes, or guy wires (metal wires).

[0036] The gantry 21 is supported by the upper rotating body 12 behind the boom 16. As shown in FIG. 1, the gantry 21 is composed of two structures (compression member 21A, tension member 21B) that form a substantially triangle with the upper rotating body 12. The tension member 21B extends substantially vertically upward from the rear end of the upper rotating body 12. The compression member 21A connects the upper end of the tension member 21B to the approximately central portion of the upper rotating body 12 in a diagonal direction. The gantry 21 supports the boom 16 from behind so that the boom 16 can be raised and lowered.

[0037] The boom hoist rope 22 is pulled out from the boom hoist winch 30, hooked onto a sheave arranged at the tip of the tension member 21B, and then looped multiple times between the lower sheave block of the lower spreader 19A and the upper sheave block of the upper spreader 19B. After being looped around the lower sheave block and the upper sheave block, the tip of the boom hoist rope 22 is fixed to the tip (upper end) of the gantry 21.

[0038] The boom hoist winch 30 is disposed on the upper rotating body 12. The boom hoist winch 30 changes the distance between the lower sheave block of the lower spreader 19A and the upper sheave block of the upper spreader 19B by winding in and letting out the boom hoist rope 22, thereby raising and lowering the boom 16 while rotating the boom 16 relative to the gantry 21.

[0039] The main hoisting winch 34 hoists and lowers a load using a rope 51. For this main hoisting, a main hoist sheave block is provided at the boom tip 16Q of the boom 16, with multiple main hoist point sheaves arranged in the width direction. A main hook 53 for the load is connected to the rope 51 hanging down from the main hoist sheave block. The rope 51 pulled out from the main hoisting winch 34 is stretched between the sheave of the main hoist sheave block and the sheave of the sheave block provided on the main hook 53. Therefore, when the main hoisting winch 34 winds and unwinds the rope 51, the main hook 53 is hoisted and lowered.

[0040] Similarly, the auxiliary winch 35 (winch) hoists and lowers a load using a rope 52. For this auxiliary hoisting, an auxiliary sheave block with multiple auxiliary hoist point sheaves arranged in the width direction is provided at the tip of the jib 18. A load auxiliary hook 54 is connected to the rope 52 hanging down from the auxiliary sheave block. The rope 52 pulled out from the auxiliary winch 35 is passed through a sheave (not shown) on the strut 55 and stretched between the sheave of the auxiliary sheave block and the sheave of the sheave block on the load auxiliary hook 54. When the auxiliary winch 35 winds or unwinds the auxiliary hoisting rope 52, the load auxiliary hook 54 connected to the end of the rope 52 is hoisted or lowered. The rope 52 is also hooked around an idler sheave 18S (described below) at the longitudinal center of the jib 18. As a result, the rope 52 extends along the jib 18 as shown in FIG.

[0041] In addition, a counterweight 40 is mounted on the rear of the upper rotating body 12 to adjust the balance of the crane 1.

[0042] The strut 55 is supported at the jib base end 18P of the jib 18 so as to be rotatable in the direction of elevation. The strut 55 functions as a support that supports the jib 18 from the rear. The tip of the strut 55 is connected to the longitudinal center of the boom 16 by a strut guy line 56, and is also connected to the jib tip end 18Q of the jib 18 by a jib guy line 57.

[0043] 2, 3, and 4 are a side view, a plan view, and a rear view of the rope inspection device 7 of the crane 1 according to this embodiment. For ease of explanation, each direction is shown in Fig. 2 to 4 with the jib 18 in Fig. 1 in a lowered position so as to extend horizontally.

[0044] The crane 1 further includes a rope inspection device 7. The rope inspection device 7 is detachable from the jib 18 of the crane 1. The rope inspection device 7 includes a rope deterioration inspector 70 (rope inspector), a support unit 7S, a plurality of U-bolts 71V, and an idler sheave 18S (sheave). The support unit 7S includes a fixed plate 71, a support body 72 (sheave support portion), and an inspector support portion 73.

[0045] The rope deterioration detector 70 is capable of inspecting the deterioration state of the rope 52. In this embodiment, the rope deterioration detector 70 has a cylindrical shape and receives the rope 52 in its cylindrical internal space. The rope deterioration detector 70 generates a magnetic field in the internal space and detects deterioration of the rope 52 based on changes in the magnetic field. Since the rope deterioration detector 70 is cylindrical, it can measure the condition of the entire circumference of the rope 52. A resin member or the like may be attached to the cylindrical inner surface of the rope deterioration detector 70 to improve the sliding properties of the rope 52. Note that the mechanism by which the rope deterioration detector 70 detects deterioration of the rope 52 is not limited to the magnetic mechanism described above, but may also be mechanical or optical. Furthermore, the rope deterioration detector 70 is not limited to a cylindrical shape and may have another cylindrical shape, or may be a plate-like or rectangular parallelepiped shape disposed opposite the rope 52.

[0046] The fixed plate 71 is a plate-like member that extends elongatedly in the left-right direction as shown in Fig. 3. The fixed plate 71 is disposed so as to straddle a pair of left and right main pipes 180 that form the back surface of the jib 18. As shown in Figs. 2 to 4, both left and right ends of the fixed plate 71 are fixed to the main pipes 180 by two pairs of left and right U-bolts 71V. The fixed plate 71 has a plate main body 71A and a pair of left and right support body connecting portions 71B. The pair of left and right support body connecting portions 71B are rectangular parallelepiped protrusions that are arranged at an interval in the left-right direction on the upper surface of the plate main body 71A (see Fig. 8).

[0047] The support body 72 (sheave support portion) has a pair of left and right support walls 72H, each of which has an L-shape, when viewed from behind as shown in Fig. 4. These support walls 72H are connected to the support body connection portion 71B of the fixed plate 71 by connection pins 71P. A sheave rotation shaft 18A that rotatably supports the idler sheave 18S is disposed between the pair of left and right support walls 72H. An upper connection pin 72P is disposed above the sheave rotation shaft 18A.

[0048] 3, the detector support portion 73 is fixed to the left and right support walls 72H of the support body 72. The detector support portion 73 supports the rope deterioration detector .

[0049] The idler sheave 18S (sheave) is rotatably supported by the support body 72 via the sheave rotation shaft 18A. The idler sheave 18S has an outer circumferential surface on which the rope 52 pulled out from the winch 35 is hung.

[0050] FIG. 5 is a rear view showing the rope inspection device 7 according to this embodiment being attached to the jib 18 of the crane 1. The left side of FIG. 5 shows the crane 1 disassembled and the jib 18 placed on the platform of a transport vehicle. In this embodiment, the rope inspection device 7, including the idler sheave 18S and the rope deterioration detector 70, can be detached from the jib 18 as a single unit. This allows the jib 18 to be transported while satisfying the transport height limit H on the transport vehicle. Meanwhile, once the jib 18 is transported to the work site, the rope inspection device 7 is lifted and attached to the jib 18 by an auxiliary lifting device 100, such as another auxiliary crane. While the above description describes the fixing plate 71 and the multiple U-bolts 71V as constituting part of the rope inspection device 7, the fixing plate 71 and the multiple U-bolts 71V may also constitute part of the jib 18. Therefore, as shown in FIG. 5, the fixing plate 71 and the multiple U-bolts 71V may be transported and stored while still attached to the jib 18. On the other hand, at the work site, after the fixed plate 71 is attached to the jib 18, other parts of the rope inspection device 7 may be attached and fixed to the fixed plate 71 by the auxiliary lifting device 100.

[0051] As described above, in this embodiment, the fixed plate 71, the support body 72, and the inspector support portion 73 constitute the support unit 7S that is attached to the jib 18. The inspector support portion 73 of the support unit 7S supports the rope deterioration inspector 70 so that the rope deterioration inspector 70 can inspect the portion of the rope 52 on the opposite side of the winch 35 as viewed from the idler sheave 18S. In other words, the rope deterioration inspector 70 is disposed downstream of the idler sheave 18S in the direction in which the winch 35 pays out the rope 52.

[0052] With this configuration, the support unit 7S supports the idler sheave 18S and the rope deterioration detector 70 so that the rope deterioration detector 70 can inspect the portion of the rope that has passed over the outer peripheral surface of the idler sheave 18S. This allows the rope deterioration detector 70 to accurately detect the deterioration of the rope 52, while the position of the rope 52 that has been pulled out from the winch 35 and extended along the jib 18 is stably maintained by the idler sheave 18S. Furthermore, because the support unit 7S is attached to the jib 18, even if the hoisting structure including the jib 18 hoists and lowers relative to the upper rotating structure 12, the relative positions of the jib 18, the idler sheave 18S, and the rope deterioration detector 70 are maintained, allowing stable inspection of the rope 52.

[0053] The inspection of the rope 52 by the rope inspection device 7 may be performed while the crane 1 is in operation, or may be performed after the operation is completed or before the operation is started. In this embodiment, the rope inspection device 7 allows constant monitoring of the rope 52, which makes it possible to prevent damage to the rope 52 from becoming severe due to oversight, compared to when an operator visually inspects and checks the rope 52.

[0054] Furthermore, it is desirable that the rope inspection device 7 be detachable from the jib 18. In this case, the rope inspection device 7 can be removed from the jib 18 when the crane 1 is disassembled and transported, so that the components constituting the jib 18 can be transported within the transport height limit of the transport vehicle for the components. Also, when an unused rope 52 is prepared and attached, or when no inspection is required for the time being, the rope inspection device 7 can be removed from the jib 18, thereby making it possible to reduce the weight of the jib 18 during operation.

[0055] In addition, in this embodiment, the idler sheave 18S can guide the rope 52 toward the tip of the jib 18, so that the rope 52 can be easily inspected even in a configuration in which there is no idler sheave at the tip of the jib 18.

[0056] Second Embodiment Next, a second embodiment of the present invention will be described. In this embodiment, differences from the first embodiment will be mainly described (the same applies to the following embodiments). Figures 6 and 7 are side views of the rope inspection device 7 of the crane 1 according to this embodiment.

[0057] In this embodiment, the inspector support portion 73 has a first support portion 73A, a second support portion 73B, a third support portion 73C, a pivot pin 73P, and a plurality of fixed pins 73Q. The first support portion 73A is supported by the support body 72. The second support portion 73B is rotatable relative to the first support portion 73A around the pivot pin 73P. The rotation angle of the second support portion 73B can be set arbitrarily. The third support portion 73C is fixed to the second support portion 73B by a plurality of fixed pins 73Q so as to be extendable and retractable relative to the second support portion 73B.

[0058] Thus, in this embodiment, the support unit 7S has a first support portion 73A, a second support portion 73B, and a pivot pin 73P (all of which are inspector angle adjustment portions) that can adjust the relative angle of the rope deterioration inspector 70 with respect to the jib 18. With this configuration, the relative angle of the rope deterioration inspector 70 with respect to the jib 18 can be adjusted, so that the rope 52 can be inspected for deterioration in a stable posture corresponding to various positions on the jib 18. In particular, the angle of the rope deterioration inspector 70 can be changed without changing the attachment position of the fixing plate 71 with respect to the jib 18.

[0059] Furthermore, in this embodiment, the support unit 7S further has a second support portion 73B, a third support portion 73C, and a plurality of fixing pins 73Q (all of which are detector height adjustment units) that can adjust the relative height of the rope deterioration detector 70 with respect to the jib 18. With this configuration, the detector height adjustment units can adjust the relative height of the rope deterioration detector 70 with respect to the jib 18, so that the rope 52 can be inspected for deterioration in a stable posture corresponding to various positions on the jib 18. Furthermore, the height of the rope deterioration detector 70 can be changed without changing the mounting position of the fixing plate 71 with respect to the jib 18.

[0060] Furthermore, the effects of the above-mentioned inspection device angle adjustment unit and inspection device height adjustment unit make it possible to install the rope inspection device 7 in various positions depending on the model and specifications of the crane 1, making it possible to inspect the rope 52 for deterioration.

[0061] <Third embodiment> Next, a third embodiment of the present invention will be described. Fig. 8 is a perspective view of a fixing plate 71 of a rope inspection device 7 of a crane 1 according to this embodiment. Figs. 9, 10, and 11 are a side view, a plan view, and a rear view of the rope inspection device 7 of a crane 1 according to this embodiment.

[0062] This embodiment differs from the first embodiment in the attachment structure of the fixed plate 71 to the jib 18. The jib 18 can be separated into multiple members along its longitudinal direction. As an example, the jib 18 has a first jib member 18B (first member), a second jib member 18C (second member), and a pair of left and right jib connection pins 18M (elevating body connection pins) that connect these together.

[0063] Meanwhile, the rope inspection device 7 further has a pair of left and right fixing links 74. The fixing plate 71 also has two pairs of left and right positioning portions 71C (restriction portions) and a pair of left and right link mounting protrusions 71D (protrusions).

[0064] 8, a pair of positioning portions 71C are arranged at left and right ends of the plate body 71A of the fixed plate 71, spaced apart in the front-rear direction. A link mounting projection 71D is arranged between the pair of positioning portions 71C so as to protrude outward in the left-right direction. This link mounting projection 71D extends parallel to the aforementioned jib connecting pin 18M.

[0065] The pair of left and right fixing links 74 each have a first pin hole 74A (first hole portion) and a second pin hole 74B (second hole portion, hole portion) that are spaced apart vertically (FIG. 9). The first pin hole 74A receives the link mounting protrusion 71D. The second pin hole 74B receives the jib connecting pin 18M.

[0066] 11, when the fixing plate 71 is placed on the jib 18 (first jib member 18B, second jib member 18C), the tips of the jib connecting pins 18M that connect the first jib member 18B and the second jib member 18C protrude in the left-right direction on both the left and right sides of the jib 18. Similarly, above the jib connecting pins 18M, link mounting protrusions 71D protrude in the left-right direction. Therefore, when an operator inserts the pin holes of the fixing links 74 into the link mounting protrusions 71D and the jib connecting pins 18M, respectively, the fixing plate 71 is fixed to the jib 18 by the fixing links 74.

[0067] As described above, in this embodiment, the rope inspection device 7 can be stably attached to the jib 18 by utilizing the jib connecting pin 18M that connects the first jib member 18B and the second jib member 18C of the jib 18. Therefore, unlike the first embodiment, it is not necessary to use multiple U-bolts 71V to secure the rope inspection device 7. This improves the ease of assembly of the rope inspection device 7.

[0068] Furthermore, in this embodiment, a pair of positioning portions 71C (restricting portions) on both the left and right sides of the fixing plate 71 are arranged so as to sandwich the fixing link 74 from both the front and rear sides. Therefore, the pair of positioning portions 71C function as positioning members and anti-rotation members that restrict rotation of the fixing link 74 around the link mounting projection 71D. With this configuration, the pair of positioning portions 71C stably maintain the posture of the fixing link 74, thereby making it possible to stably maintain the relative position of the rope inspection device 7 with respect to the jib 18.

[0069] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described. Figures 12, 13, and 14 are a side view, a plan view, and a rear view of the rope inspection device 7 of the crane 1 according to this embodiment. This embodiment differs from the third embodiment mainly in that the fixing plate 71 does not have a pair of link mounting projections 71D.

[0070] Specifically, in this embodiment, the rope inspection device 7 has a pair of fixing members 75 instead of the previous pair of fixing links 74. The fixing members 75 have first pin holes 75A (hole portions) in their lower portions, and also have a pair of bolt holes (not shown) above the first pin holes 75A.

[0071] Referring to FIG. 14, when the fixing plate 71 is placed on the jib 18 (first jib member 18B, second jib member 18C), the tips of the jib connecting pins 18M that connect the first jib member 18B and the second jib member 18C protrude in the left-right direction on both the left and right sides of the jib 18. The worker inserts the first pin hole 74A of the fixing link 74 into the jib connecting pin 18M, and fastens the fixing member 75 to the side of the fixing plate 71 with two plate mounting bolts 75M (fastening members) through a pair of bolt holes in the fixing link 74. Two bolt holes are also formed in the side of the fixing plate 71. As a result, the fixing plate 71 is fixed to the jib 18 by the fixing member 75.

[0072] As described above, in this embodiment as well, the rope inspection device 7 can be stably attached to the jib 18 by utilizing the jib connecting pin 18M that connects the first jib member 18B and the second jib member 18C of the jib 18. Therefore, unlike the first embodiment, there is no need to use multiple U-bolts 71V to secure the rope inspection device 7. Furthermore, in this embodiment, there is no need to provide the positioning portion 71C and the link mounting protrusion 71D on the side surface of the fixing plate 71, as in the third embodiment, and therefore the cost and manufacturing man-hours for the rope inspection device 7 can be reduced.

[0073] Fifth Embodiment Next, a fifth embodiment of the present invention will be described. Figures 15, 16, and 17 are a rear view, a plan view, and a rear view of the rope inspection device 7 for a crane 1 according to this embodiment. Figure 18 is an exploded view of a spacer 76 of the rope inspection device 7 for a crane 1 according to this embodiment.

[0074] In this embodiment, as shown in Fig. 15, the distance between a pair of support walls 72H of the support body 72 is set wider than that in the first embodiment. As a result, a space wider than the width of the idler sheave 18S is formed between the pair of support walls 72H. The pair of support walls 72H support both ends of the sheave rotation shaft 18A.

[0075] Furthermore, in this embodiment, the rope inspection device 7 is equipped with a plurality of spacers 76. The plurality of spacers 76 are attached to the sheave rotating shaft 18A so as to be interposed between the pair of support walls 72H and the idler sheave 18S, respectively, and have the function of regulating the position of the idler sheave 18S in the axial direction of the sheave rotating shaft 18A. As shown in Figures 15 and 16, two spacers 76 are attached to the left and right of the idler sheave 18S, so that the idler sheave 18S is positioned in the left-right center of the support body 72. Note that in this embodiment, the left and right dimensions of each spacer 76 are the same.

[0076] On the other hand, as shown in Figure 17, if three spacers 76 are attached to the right side of the idler sheave 18S and one idler sheave 18S is attached to the left side of the idler sheave 18S, the idler sheave 18S can be supported at a position further to the left than in Figure 15 (see the arrow in Figure 17).

[0077] 18, each spacer 76 is composed of a pair of a first spacer member 76A and a second spacer member 76B, and a cylindrical space 76S is formed between the two spacer members. With the sheave rotating shaft 18A fitted into the cylindrical space 76S, both spacer members are fixed with two fixing bolts 76V, thereby attaching the spacer 76 to the sheave rotating shaft 18A.

[0078] As described above, in this embodiment, the position of the idler sheave 18S in the width direction is stabilized, and deterioration of the rope 52 can be stably inspected. In particular, even if the positions of the sheaves supporting the rope 52 are offset from the center in the lateral direction due to the layout of the crane 1, the position of the idler sheave 18S can be adjusted using the multiple spacers 76. This allows the rope 52 to be stably tensioned and the rope 52 to be inspected for deterioration. Furthermore, as shown in FIG. 18, the spacer 76 can be separated into two pieces, so the lateral position of the idler sheave 18S can be easily adjusted even after the rope inspection device 7 is attached to the jib 18. Note that the lateral dimensions of the multiple spacers 76 may be different from each other. Furthermore, one spacer 76 having the width dimensions of the two spacers 76 in FIG. 16 may be disposed on the left and right of the idler sheave 18S (see FIGS. 20 and 21). Furthermore, the multiple spacers 76 may have graduated widths, such as small, medium, and large.

[0079] Sixth Embodiment Next, a sixth embodiment of the present invention will be described. Fig. 19 is a side view of the rope inspection device 7 of the crane 1 according to this embodiment. Fig. 20 and Fig. 21 are both rear views of the rope inspection device 7 of the crane 1 according to this embodiment.

[0080] In this embodiment, the rope inspection device 7 has two pairs of height adjustment links 77 (sheave height adjustment units) on the left and right. Each height adjustment link 77 has four pin holes formed at the top and bottom. Specifically, each height adjustment link 77 has one fixing pin hole 77A and three adjustment pin holes 77B. A connection pin 77P is inserted into the fixing pin hole 77A of each height adjustment link 77, connecting the height adjustment link 77 to the support body connection unit 71B of the fixing plate 71. Meanwhile, in FIG. 20 , height adjustment pins 77Q are inserted into the upper two of the three adjustment pin holes 77B, respectively, thereby fixing the height adjustment link 77 to the support body 72. Note that pin holes for receiving the height adjustment pins 77Q are also formed on the support body 72 side.

[0081] 21, height adjustment pins 77Q are inserted into the lower two of the three adjustment pin holes 77B, thereby fixing the support body 72 at a lower position than that shown in FIG. 20. In this manner, in this embodiment, each height adjustment link 77 is capable of adjusting the relative height of the idler sheave 18S with respect to the jib 18. As a result, the height of the idler sheave 18S can be adjusted in accordance with the specifications of the crane 1, and then the rope 52 can be inspected for deterioration.

[0082] Furthermore, in this embodiment, each height adjustment link 77 can adjust the height of the idler sheave 18S and the rope inspection device 7 together relative to the jib 18. With this configuration, when adjusting the height of the idler sheave 18S in accordance with the specifications of the crane 1, deterioration of the rope 52 can be stably inspected without significantly changing the relative position between the idler sheave 18S and the rope inspection device 7.

[0083] The rope inspection device 7 and the crane 1 equipped with the same according to each embodiment of the present invention have been described above. However, the present invention is not limited to these embodiments. The following modified embodiments are possible according to the present invention.

[0084] (1) In the above embodiment, the rope inspection device 7 is described as being attached to the jib 18. However, the hoisting body to which the rope inspection device 7 is attached is not limited to the jib 18, and may be the boom 16 or a strut (including a front strut and a rear strut). Furthermore, if the crane 1 has a mast (not shown), the rope inspection device 7 may be attached to the mast. Furthermore, the rope to be inspected by the rope inspection device 7 is not limited to the rope 52 in FIG. 1, and may be the rope 51, the boom hoisting rope 22, etc.

[0085] (2) Furthermore, the configurations and features of the above-described embodiments can be combined with each other.

[0086] (3) In the above embodiment, the crane 1 shown in FIG. 1 was used for explanation. However, the present invention is not limited to this and can be applied to cranes with other structures. That is, the crane to which the present invention is applied may be a general-purpose crane equipped with a lattice mast instead of the gantry, and each winch may be disposed on the lattice mast or boom. Furthermore, as a large crane, the crane may be configured so that the boom is raised and lowered by raising and lowering the box mast. Furthermore, the struts may include front and rear struts. The traveling structure of the undercarriage 14 may be crawlers or tires, and a fixed lower body may be provided instead of the undercarriage 14. The work machine according to the present invention is not limited to a crane and may be of other configurations. [Explanation of symbols]

[0087] 1 Crane (working machine) 100 Auxiliary lifting device 12 Upper rotating body 14 Undercarriage 16. Boom 18 Jib (elevating body) 180 Main Pipe 18A Sheave rotating shaft 18B First jib member 18C Second jib member 18M Jib connection pin (elevating body connection pin) 18S Idler Sheave (Sheave) 22 Boom hoisting rope 34, 35 Winches 51, 52 Rope 53 Main Hook 54 Auxiliary hook 7 Rope inspection equipment 70 Rope Deterioration Inspection Device (Rope Inspection Device) 71 Fixing plate 71A Plate body 71B Support connection part 71C Positioning part (regulating part) 71D Link mounting protrusion (protrusion) 71P connection pin 71V U-Volt 72 Support body (sheave support part) 72H Support wall 72P Upper connection pin 73 Inspection device support part 73A First support part (inspection device angle adjustment part) 73B Second support part (inspection device angle adjustment part) 73C Third support unit (inspection device height adjustment unit) 73P Rotating pin (inspection instrument angle adjustment part) 73Q Fixing pin (inspection instrument height adjustment part) 74 Permalink 74A 1st pin hole (1st hole) 74B 2nd pin hole (2nd hole, hole) 75 Fixing member 75A pin hole 75M Plate Mounting Bolt (Fastening Component) 76 Spacer 76A First spacer member 76B second spacer member 76S Cylindrical Space 76V fixing bolt 77 Height adjustment link (sheave height adjustment part) 77P connection pin 77Q Height adjustment pin 7S Support Unit G ground

Claims

1. A rope inspection device that is attached to a work machine having a body, a hoisting body that can be raised and lowered relative to the body, a winch, and a rope that is pulled out from the winch, a rope inspection device capable of inspecting the deterioration state of the rope; a sheave having an outer peripheral surface on which the rope drawn from the winch is hung, and guiding the rope toward the tip end of the undulating body between the tip end of the undulating body and the base end of the undulating body; A support unit attached to the back of the elevation body includes a sheave support portion that rotatably supports the sheave, and an inspector support portion that supports the rope inspector so that the rope inspector can inspect the portion of the rope on the opposite side of the winch as viewed from the sheave. A rope inspection device comprising:

2. The rope inspection device according to claim 1 , wherein the support unit further comprises an inspector angle adjustment unit that can adjust the relative angle of the rope inspector with respect to the undulating body.

3. 3. The rope inspection device according to claim 1, wherein the support unit further comprises an inspector height adjustment unit capable of adjusting the relative height of the rope inspector with respect to the undulating body.

4. A rope inspection device attached to a work machine having a machine body, a hoisting body that can be raised and lowered relative to the machine body, a winch, and a rope pulled out from the winch, a rope inspection device capable of inspecting the deterioration state of the rope; a sheave having an outer circumferential surface on which the rope drawn from the winch is hung; A support unit attached to the escalator includes a sheave support portion that rotatably supports the sheave, and an inspector support portion that supports the rope inspector so that the rope inspector can inspect a portion of the rope on the opposite side of the winch as viewed from the sheave. Equipped with the undulating body has a first member, a second member, and an undulating body connecting pin that connects the first member and the second member; The support unit includes: a fixing plate that includes a protrusion extending parallel to the undulating body connection pin and is placed on the undulating body; a fixing link having a first hole portion that receives the protrusion portion of the fixing plate and a second hole portion that receives the undulating body connecting pin that connects the first member and the second member, and that fixes the fixing plate to the undulating body; A rope inspection device having

5. The rope inspection device according to claim 4 , wherein the fixing plate further includes a restricting portion that restricts rotation of the fixing link around the protrusion.

6. A rope inspection device attached to a work machine having a machine body, a hoisting body that can be raised and lowered relative to the machine body, a winch, and a rope pulled out from the winch, a rope inspection device capable of inspecting the deterioration state of the rope; a sheave having an outer circumferential surface on which the rope drawn from the winch is hung; A support unit attached to the escalator includes a sheave support portion that rotatably supports the sheave, and an inspector support portion that supports the rope inspector so that the rope inspector can inspect a portion of the rope on the opposite side of the winch as viewed from the sheave. Equipped with the undulating body has a first member, a second member, and an undulating body connecting pin that connects the first member and the second member; The support unit includes: a fixed plate placed on the undulating body; a fixing member having a hole for receiving the undulating body connecting pin that connects the first member and the second member, and fixed to the fixing plate by a plurality of fastening members; A rope inspection device having

7. The support unit includes: a sheave rotation shaft that rotatably supports the sheave; A pair of support walls that support both ends of the sheave rotating shaft, a plurality of spacers attached to the sheave rotating shaft so as to be respectively interposed between the pair of support walls and the sheave, and which regulate the position of the sheave in the axial direction of the sheave rotating shaft; 7. The rope inspection device of claim 1, further comprising:

8. A rope inspection device attached to a work machine having a machine body, a hoisting body that can be raised and lowered relative to the machine body, a winch, and a rope pulled out from the winch, a rope inspection device capable of inspecting the deterioration state of the rope; a sheave having an outer circumferential surface on which the rope drawn from the winch is hung; A support unit attached to the escalator includes a sheave support portion that rotatably supports the sheave, and an inspector support portion that supports the rope inspector so that the rope inspector can inspect a portion of the rope on the opposite side of the winch as viewed from the sheave. Equipped with The rope inspection device, wherein the support unit further includes a sheave height adjustment unit capable of adjusting the relative height of the sheave with respect to the undulating body.

9. The rope inspection device according to claim 8 , wherein the sheave height adjustment unit is capable of adjusting the heights of the sheave and the rope inspection device together relative to the undulating body.

10. The aircraft and a hoisting body that can be raised and lowered relative to the fuselage; A winch and a rope drawn from the winch; The rope inspection device according to any one of claims 1 to 9, which is attached to the undulating body; A work machine comprising:

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