Monitoring device for winch drums

Abstract

The present invention relates to a monitoring device for a winch drum. The monitoring device for a winch drum (361) includes a monitoring unit (611, 628) that monitors whether a wear occurrence condition for the winch drum (361) is satisfied, and a notification unit (622) that performs notification based on satisfaction of the wear occurrence condition. For example, the monitoring unit monitors the layer state of a wire rope (32) wound around the winch drum (361), and can use as the wear occurrence condition a case where the first layer of the wire rope (32) wound around the winch drum (361) is used or a case where the movement amount of the wire rope (32) when the drum flange (363) of the winch drum (361) is used satisfies a prescribed condition.

Description

Technical Field

[0001] This application claims the benefit of priority based on Japanese Patent Application No. 2021-055337, filed on March 29, 2021. The entire contents of this Japanese patent application are incorporated herein by reference.

[0002] The invention relates to a monitoring device for a winch drum. Background Art

[0003] In construction machinery such as cranes that wind and unwind a wire rope using a winch drum, a camera has conventionally been used to capture images of the winch drum and notify workers of the occurrence of miswinding (see, for example, Patent Document 1).

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-1163

[0005] However, the conventional monitoring device described above only notifies the operator of the occurrence of random winding, and is unable to notify the operator of the occurrence and extent of wear of the winch drum caused by the repeated movement of the wire rope. Summary of the Invention

[0006] The object of the present invention is to monitor the wear state of a winch drum.

[0007] The present invention is a monitoring device for a winch drum of a crane, which has:

[0008] A monitoring mechanism for monitoring whether a preset wear condition of the winch drum is met; and

[0009] The notification mechanism performs notification in response to the establishment of the wear occurrence condition.

[0010] Effects of the Invention

[0011] According to the present invention, the wear state of the winch drum can be effectively monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a side view of a crane equipped with a winch drum monitoring device according to an embodiment of the present invention.

[0013] Figure 2 This is a block diagram showing the structure of a crane control device and its periphery.

[0014] Figure 3 It is an explanatory diagram showing a specific form of the measuring unit.

[0015] Figure 4 This is an example of a screen display showing operating information such as various set values ​​and detection values ​​in a crane.

[0016] Figure 5is a flowchart showing monitoring processing by the monitoring processing section.

[0017] Figure 6 is a block diagram showing the structure of an information management system of a crane.

[0018] In the figure: 1 - crane, 32 - hoist rope (wire rope), 36 - hoist winch, 37 - luffing rope, 42 - luffing winch, 50 - management server, 60 - control device, 61 - controller, 70 - information terminal, 100 - information management system, 361 - winch drum, 362 - winding portion, 363 - drum flange, 611 - monitoring processing section (monitoring mechanism), 612 - transmission processing section (monitoring mechanism), 621 - input section, 622 - display device (notification mechanism), 628 - measuring section (monitoring mechanism), 629 - distance measuring device, 630 - rotational amount detecting device, G - display screen, N1 - first icon, N2 - second icon, W - tier column information display section, a - column, b - column. DETAILED DESCRIPTION

[0019] [Overview of Crane]

[0020] Figure 1 is a side view of a crane as a construction machine on which a monitoring device of a winch drum according to an embodiment of the present application is mounted.

[0021] The crane 1 is a so-called mobile crawler crane. With respect to the crane 1, the vehicle advancing direction is set as the "front side", the retreating direction is set as the "rear side", in a state of facing the front side, the left-hand side (paper inside) is set as the "left side", and the right-hand side (paper front side) is set as the "right side". Also, a lower traveling body 2 that travels and an upper revolving body 3 that revolves on the lower traveling body are provided, but in the case where nothing is particularly mentioned, the directions of the respective parts are explained on the principle that the lower traveling body 2 and the upper revolving body 3 are in a state in which the front and rear directions coincide (set as a reference posture). Figure 1 Figure 1 As shown in

[0022] As shown in Figure 1 , the crane 1 includes a self-propelled crawler lower traveling body 2, an upper revolving body 3 that is revolvably mounted on the lower traveling body 2, and a boom 4 that is pivotably mounted to the front side of the upper revolving body 3.

[0023] The lower traveling body 2 includes a main body 21 and crawler belts 22 provided on both left and right sides of the main body 21. The left and right crawler belts 22 are each rotationally driven by a not-shown traveling hydraulic motor.

[0024] ​A boom 4 is mounted on the front side of the upper slewing body 3 so as to be tiltable. A pulley 43 for guiding a hoisting rope 32 as a wire rope is mounted rotatably near the upper front end of the boom 4.

[0025] Furthermore, a lower end portion of the mast 31 is supported at a position rearward of the boom 4 in the upper revolving body 3 .

[0026] The upper revolving body 3 is driven to rotate about an axis in the vertical up-down direction relative to the lower traveling body 2 by a revolving hydraulic motor (not shown).

[0027] A counterweight 5 is mounted on the rear portion of the upper slewing body 3 to maintain the weight balance of the boom 4 and the suspended load L. The number of counterweights 5 can be increased or decreased as needed.

[0028] A luffing winch 42 is provided near the counterweight 5 to perform the luffing operation of the boom 4, and a hoisting winch 36 is provided in front of the luffing winch 42 to wind up and release the hoisting rope 32. The hoisting winch 36 winds up and releases the hoisting rope 32 using a hoisting hydraulic motor (not shown), thereby raising and lowering the hook 34 and the load.

[0029] Furthermore, a control room 33 is arranged on the right front side of the upper slewing body 3 .

[0030] The mast 31 has an upper spreader 35 at its upper end. The upper spreader 35 is connected to a boom guy wire 44, one end of which is connected to the upper end of the boom 4. A lower spreader (not shown) is provided below the upper spreader 35. When a luffing rope 37, a wire rope wound multiple times between the upper spreader 35 and the lower spreader, is wound or unwound by a luffing winch 42, the distance between the upper spreader 35 and the lower spreader changes, causing the boom 4 to pitch. The luffing winch 42 is driven by a luffing hydraulic motor (not shown).

[0031] [Crane control system]

[0032] A control device 60 for the crane 1 is attached to the operator's cabin 33 of the upper slewing body 3 . Figure 2 This is a block diagram showing the configuration of the control device 60 and its surroundings. The control device 60 is a control terminal mounted on the crane 1. In addition to controlling various operations of the crane 1, such as traveling, slewing, and winding and unwinding of the hoisting rope 32, the control device 60 also monitors the winding and unwinding of the hoisting rope 32 by the hoisting winch 36.

[0033] The control device 60 includes a controller 61 that includes a calculation processing unit including a CPU, a ROM and a RAM as storage devices, and other peripheral circuits.

[0034] The controller 61 includes software modules: a monitoring unit 611 for monitoring the winding and unwinding of the hoisting rope 32, described later, and a transmission unit 612 for outputting crane operation information to the outside. The monitoring unit 611 and the transmission unit 612 may also be implemented as hardware.

[0035] An input unit 621 , a display device 622 , an operating lever 624 , a memory 625 , a transmitting unit 626 , and a receiving unit 627 are connected to the controller 61 , and these constitute the control device 60 .

[0036] Furthermore, the controller 61 is connected to a load cell 631 , a boom angle sensor 632 , a rotation amount sensor 633 , a control valve 635 , and a measuring unit 628 .

[0037] The monitoring processing unit 611 and the measuring unit 628 function as monitoring means for monitoring whether a predetermined wear condition is satisfied on the winch drum 361 of the hoisting winch 36. The monitoring means and the transmission processing unit 612 constitute a winch drum monitoring device.

[0038] The details of the functions of the monitoring processing unit 611 and the transmission processing unit 612 will be described later.

[0039] The input unit 621 is provided in the control room 33 and is an input interface such as a touch panel. It outputs control signals corresponding to the operator's operations to the controller 61. The operator can operate the input unit 621 to set the length of the boom 4, the weight of the load, and other various settings and various inputs required for operation.

[0040] The display device 622 is provided in the control room 33 and includes, for example, a touch panel display which also serves as an input unit 621. The display screen displays information such as the weight of the load, the boom angle, and the rotation angle of the upper rotary body 3 according to the control signal output from the controller 61 (see FIG. Figure 4 ) Furthermore, the display device 622 functions as a notification unit that performs notification based on display by the monitoring processing unit 611 described later.

[0041] The operating lever 624 is provided in the control room 33 , and is used to manually input operations for causing the crane 1 to perform various actions, for example. A control signal corresponding to the amount of operation of the operating lever 624 is input to the controller 61 .

[0042] For example, the operating lever 624 can perform operation inputs for the traveling motion of the lower traveling body 2 , the swinging motion of the upper swinging body 3 , the pitching motion of the boom 4 , and the winding and releasing of the hoisting rope 32 by the hoisting winch 36 .

[0043] The transmission unit 626 and the reception unit 627 are wireless communication devices that perform wireless-based transmission and reception with the external communication base station 150 (see FIG. 1) described later, and perform information communication with an external communication network via the communication base station 150. Figure 6

[0044] The load cell 631 is attached to the upper hoist 35, detects the tension of the boom rope 44 that acts to tilt the boom 4, and outputs a control signal corresponding to the detected tension to the controller 61.

[0045] The boom angle sensor 632 is attached to the base end side of the boom 4, detects the tilt angle of the boom 4 (hereinafter, also referred to as the boom angle), and outputs a control signal corresponding to the detected boom angle to the controller 61. The boom angle sensor 632, for example, detects the angle with respect to the horizontal plane, i.e., the angle with respect to the ground, as the boom angle.

[0046] The swing amount sensor 633 is attached between the lower traveling body 2 and the upper swing body 3, detects the swing angle of the upper swing body 3, and outputs a control signal corresponding to the detected swing angle to the controller 61. The swing amount sensor 633, for example, detects the angle around the vertical axis as the swing angle.

[0047] The control valve 635 is configured of a plurality of valves that can be switched according to a control signal from the controller 61.

[0048] For example, the control valve 635 includes a valve that controls the rotational drive of the left and right tracks 22 of the lower traveling body 2, a valve that controls the swing operation of the upper swing body 3, a valve that controls the rotational drive of the tilt winch 42, a valve that controls the rotational drive of the hoist winch 36, and the like.

[0049] The measurement unit 628 detects the layer state of the hoist rope 32 wound around the winch drum 361 of the hoist winch 36. Figure 3 is a diagram that shows the specific manner of the measurement unit 628.

[0050] The layer state of the hoist rope 32 indicates the number of layers and the number of columns of the hoist rope 32 that are stacked in layers and wound with respect to the winch drum 361.

[0051] Note that the hoist rope 32 located at a position deviated from the state of being wound around the winding portion 362 on which the hoist rope 32 of the winch drum 361 is wound is referred to as the "paying-out portion of the wire rope". Therefore, the layer state of the hoist rope 32 indicates the layer and the column in which the paying-out portion of the hoist rope 32 is located.

[0052] That is, as shown in Figure 3 ​As shown, the winch drum 361 has a winding portion 362 around which the hoisting rope 32 is wound, and two flange-like drum flanges 363 provided at either end of the winding portion 362. The hoisting rope 32 is sequentially wound around the winding portion 362 of the winch drum 361, from one drum flange 363 side to the other drum flange 363 side. This winding process is repeated, resulting in stacking the ropes to form layers. Specifically, the number of layers up to the outermost end of the hoisting rope 32 is the "number of layers" in the "layered state." Furthermore, the number of times the outermost hoisting rope 32 is wound from the end is the "number of columns" in the "layered state."

[0053] It should be noted that when the hoisting rope 32 is wound by the winch drum 361, if the hoisting rope 32 is wound one layer from the side of one of the drum flanges 363 to the side of the other drum flange 363, then in the next layer, the hoisting rope 32 is turned back and wound one layer from the side of the other drum flange 363 to the side of one of the drum flanges 363. By alternately repeating this winding, the hoisting rope 32 is wound in multiple layers.

[0054] Therefore, in the odd-numbered layers of the hoisting rope 32, the first row is on the side of one of the drum flanges 363 ( Figure 3 In the example, the left roll flange 363), in the even-numbered layers, the first column becomes the other roll flange 363 side ( Figure 3 In the example, the right side roller flange 363).

[0055] The measuring unit 628 detects the winch drum 361 that winds up the hoisting rope 32 in this manner using a laser scanning distance measuring device 629 such as LiDAR and a rotation amount detecting device 630 such as a potentiometer to detect the rotation amount (rotation angle) of the winch drum 361 .

[0056] The distance measuring device 629 is not limited to a laser scanning type such as LiDAR, and other sensors or cameras that can detect the distance to the wound hoisting rope 32 can also be used.

[0057] Likewise, the rotation amount detection device 630 is not limited to a potentiometer, and any sensor capable of detecting the rotation amount of the winch drum 361 can be used.

[0058] like Figure 3As shown, the distance measuring device 629 performs a laser scan from the outside of the winch drum 361 in the direction of its rotation radius toward the inside of the winch drum 361 in the direction of its rotation radius, within a plane including the center axis of the winch drum 361, and measures the distance between one drum flange 363 and the other drum flange 363 to the hoisting rope 32 exposed on the surface side. Based on this measurement result, the axial cross-sectional shape of the winch drum 361 can be measured, and the layering state of the hoisting rope 32 wound on the winch drum 361 can be detected.

[0059] For example, Figure 3 When the outermost layer of the hoisting rope 32 is wound to the end in this way, the distance measuring device 629 obtains a measurement result that the distance between one drum flange 363 and the other drum flange 363 is approximately uniform from the distance measuring device 629 to the surface of the hoisting rope 32.

[0060] Therefore, based on the above-mentioned measurement results, the number of layers of the hoisting rope 32 is obtained from the distance from the distance measuring device 629 to the surface of the wound hoisting rope 32.

[0061] Then, the obtained distances are made substantially uniform, and the hoisting rope 32 is wound just to the end (the maximum number of rows in one layer) is determined.

[0062] Furthermore, when the hoisting rope 32 is wound halfway in the outermost layer, if the distance from the distance measuring device 629 to the surface of the hoisting rope 32 is measured between one drum flange 363 and the other drum flange 363 using the distance measuring device 629, a result showing that a step difference occurs in the middle can be obtained.

[0063] Therefore, based on the measurement results, the number of layers of the hoisting rope 32 is determined from the distance from the distance measuring device 629 to the surface of the wound hoisting rope 32 (the distance on the closer side across the step).

[0064] The number of rows is determined by dividing the distance from one or the other drum flange 363 to the step by the width (outer diameter) of the hoisting rope 32 .

[0065] Furthermore, although details will be described later, the monitoring processing unit 611 performs processing to accumulate the total amount of winding and unwinding (winding rope length) in a specific layer or column of the winding rope 32 during operation.

[0066] The rotation amount detection device 630 can detect the rotation amount (change in rotation angle) of the winch drum 361 from the origin, thereby obtaining the winding amount or the unwinding amount in a specific number of layers or rows of the hoisting rope 32 .

[0067] [Monitoring and processing of winch drum]

[0068] The monitoring processing unit 611 cooperates with the measuring unit 628 to monitor whether a predetermined wear condition of the winch drum 361 is satisfied.

[0069] The winch drum 361 has a specific portion where the hoisting rope 32 is strongly rubbed and easily abraded during the winding and releasing operation.

[0070] like Figure 3 As shown, in the case of any row a of the first layer (innermost layer), when the hoisting rope 32 is wound or released, the hoisting rope 32 directly and strongly rubs against the outer peripheral surface of the winding portion 362 of the winch drum 361, and is easily worn.

[0071] Furthermore, when the hoisting rope 32 of the first row (referred to as row b) in all layers (including the first layer) of the drum flange position of the winch drum 361 is wound or unwound, it directly rubs strongly against the drum flange 363 and is easily worn.

[0072] Therefore, the monitoring processing unit 611 determines that the wear occurrence condition is satisfied when the first layer (innermost layer) of the hoisting rope 32 of the winch drum 361 is wound or unwound.

[0073] Furthermore, the monitoring processing unit 611 sets a condition related to the flange-adjacent movement amount, which is the amount of movement of the hoisting rope 32 at a position adjacent to the drum flange 363, as a wear-initiating condition. More specifically, the wear-initiating condition is determined to be satisfied when the ratio of the cumulative value (the flange-adjacent movement amount) of the hoisting rope 32 movement amount (the winding-up length and the pay-out length) in each layer's column b relative to the cumulative value (the total movement amount of the hoisting rope 32) of the entire winding-up and pay-out lengths of the winch drum 361 exceeds a predetermined value (threshold value). In this case, the cumulative value is accumulated for each layer's column b, and each cumulative value is determined to be greater than the threshold value. Furthermore, the cumulative value is accumulated based on the absolute values ​​of the winding-up and pay-out lengths, regardless of the winding-up and pay-out directions.

[0074] The above-mentioned wear-generating conditions (conditions related to the movement amount of the hoisting rope 32 in column b of each layer, i.e., the flange adjacent movement amount) are not limited to the ratio of the flange adjacent movement amount to the total movement amount of the hoisting rope 32 exceeding the threshold value, but may also be the ratio of the flange adjacent movement amount to the specified period or specified movement amount exceeding the threshold value.

[0075] If any of the above-mentioned wear occurrence conditions is satisfied, the monitoring processing unit 611 executes a notification process. The notification process displays a notification icon on the display device 622 to allow the operator to recognize the occurrence of wear on the winch drum 361, for example.

[0076] Figure 4 An example of a display screen G that displays operating information such as various setting values ​​and detection values ​​in the crane 1 on the display device 622 is shown. This display screen G is always displayed while the crane 1 is in use.

[0077] In the two specified frames in the display screen G, the first icon N1 indicating that the wear generation condition is met when winding or unwinding is performed on the first layer and the second icon N2 indicating that the wear generation condition is met when the cumulative value of the winding length and unwinding length in the first column exceeds the threshold are displayed.

[0078] The first icon N1 imitates the winch drum 361, and the number "1" indicating the first floor is marked in the icon.

[0079] The second icon N2 imitates the winch drum 361 , and is described together with an indication of a strong friction state of the drum flange 363 .

[0080] The display method of each of these icons N1 and N2 is not limited to being displayed only when the wear-incurring condition is met. For example, each icon N1 and N2 may be displayed normally, and when the wear-incurring condition is met, the icon or background may be brightened or its color may be changed, the icon may be flashed, the icon may be enlarged, or any other display method that allows visual recognition of the meeting of the wear-incurring condition may be used.

[0081] Furthermore, a layer information display W is provided below the display frames of the icons N1 and N2 within the display screen G. Regardless of whether the wear-inducing conditions are met, the layer information display W displays layer information indicating the layer and column of the unwound portion of the hoisting rope 32 currently being wound or unwound from the winch drum 361. The layer information display W also displays the total number of columns wound in one layer, next to the measured number of columns.

[0082] It should be noted that the notification process is not limited to the display by the display device 622, and any method that can be recognized by the staff, such as display by a notification lamp or output of sound by the sound output unit, can also be adopted.

[0083] Figure 5 1 is a flowchart showing the monitoring process performed by the monitoring processing unit 611. The monitoring process will be described in detail based on this flowchart. It should be noted that the process of this flowchart is repeatedly executed by the monitoring processing unit 611 at a small cycle time set in advance.

[0084] The monitoring processing unit 611 controls the distance measuring device 629 to measure the distance to the winch drum 361 by laser scanning (step S1). Then, based on the measurement result, the layer information of the hoisting rope 32 currently wound on the winch drum 361 is obtained (step S3).

[0085] Further, it is determined from the layer column information whether or not the winding or unwinding of the hoisting rope 32 is being performed in the first column of any of the layers of the winch drum 361 (step S5).

[0086] As a result, when it is determined in step S5 that the winding or unwinding of the hoisting rope 32 is being performed in the first column, the monitoring processing section 611 accumulates the amount of winding or unwinding of the hoisting rope 32 in the first column by the rotation amount detection device 630 (step S7), and the processing proceeds to step S9.

[0087] Note that, as described above, the monitoring processing is repeatedly performed with a small cycle time set in advance, and thus the amount of change in the detection by the rotation amount detection device 630 from the last monitoring processing is found, and the absolute value thereof is accumulated. Further, the accumulated value is found for each layer, and thus the accumulated values in the respective layers are added.

[0088] On the other hand, when it is determined that the winding or unwinding of the hoisting rope 32 is not being performed in the first column or after the accumulated values are added in step S7, the monitoring processing section 611 determines whether or not the ratio of the accumulated value of the amount of winding or unwinding of the hoisting rope 32 (flange adjacent movement amount) in the first column to the total movement amount of the hoisting rope 32 at present exceeds a threshold value (step S9).

[0089] As a result, when it is determined that the ratio of the accumulated values of the winding and unwinding amounts is equal to or less than the threshold value, the processing proceeds to step S13, and it is determined whether or not the winding or unwinding of the hoisting rope 32 is being performed in the first layer.

[0090] On the other hand, when it is determined that the accumulated values of the winding and unwinding amounts exceed the threshold value, the notification processing is performed, and the second icon N2 is displayed on the display device 622 (step Sll).

[0091] Next, the monitoring processing section 611 determines from the layer column information whether or not the winding or unwinding of the hoisting rope 32 is being performed in the first layer of the winch drum 361 (step S13).

[0092] As a result, when it is determined that the winding or unwinding of the hoisting rope 32 is not being performed in the first layer, the monitoring processing ends, and when it is determined that the winding or unwinding of the hoisting rope 32 is being performed in the first layer, the notification processing is performed, and the first icon Nl is displayed on the display device 622 (step S15).

[0093] After that, the monitoring processing ends.

[0094] [Transmission processing]

[0095] The transmission processing performed by the transmission processing unit 612 will be described. The transmission processing unit 612 controls the transmission unit 626 to transmit and output the operation information of the crane 1 to the outside of the crane 1.

[0096] The transmission processing unit 612 outputs the operation information to the outside periodically, for example. The period is exemplified as one day, but is not limited thereto and can be increased or decreased arbitrarily. Furthermore, the period can be set arbitrarily.

[0097] The operation information of the crane 1 outputted to the outside by the transmission processing unit 612 includes, for example, information on monitoring processing, information on working conditions of the crane 1 , and information on the content of work performed by the crane 1 .

[0098] As information related to the monitoring process (information related to the wear-generating conditions), for example, the following items stored within one period of the above-mentioned output cycle (in the above-mentioned example, one day) can be cited, namely, (1) the number of notifications of winding or releasing for the first layer, (2) the execution time of the notification, (3) the cumulative value of the winding amount and the releasing amount during the execution time of the notification (the period during which the wear-generating conditions are satisfied), (4) the number of notifications of winding or releasing for the first column, (5) the execution time of the notification, (6) the cumulative value of the winding amount and the releasing amount during the execution time of the notification (the period during which the wear-generating conditions are satisfied), etc.

[0099] Furthermore, regarding this information, the range of rope tension in the crane 1 described later can be divided into a plurality of values, and the values ​​of the above-mentioned items (1) to (6) can be obtained for each of the rope tension divisions to provide information related to monitoring processing. This allows information to be obtained that indicates the distribution of rope tension at the time of notification of winding or unwinding for the first layer or at the time of notification of winding or unwinding for the first column (during the period when the wear generation condition is satisfied).

[0100] Furthermore, for the items (4) to (6) within one period of the output cycle, the numerical values ​​of the items may be obtained for each layer and used as information related to the monitoring process.

[0101] Examples of information related to the operating conditions of the crane 1 include the length of the boom 4 and the number of wound hoisting ropes 32 .

[0102] Examples of information related to the operation performed by the crane 1 include the maximum rope tension value and the maximum operating radius recorded by the crane 1. The rope tension is the load applied to the hoisting rope 32 divided by the number of hoisting ropes 32 wound. Furthermore, the maximum operating radius is the maximum radius when viewed from above, calculated based on the boom length and the tilt angle during operation. This information also relates to the friction between the wire rope and the drum.

[0103] The transmission processing unit 612 stores the operating information including the above-mentioned items for one period of the above-mentioned output cycle (one day in the above-mentioned example), and outputs it to the outside when the output cycle arrives.

[0104] Figure 6 1 is a block diagram showing the structure of the information management system 100 of the crane 1. Figure 6 As shown, the information management system 100 includes a control device 60 of the crane 1 , an external information terminal 70 , and a management server 50 .

[0105] The management server 50 is connected to a network 130 such as a general public line network.

[0106] In addition to the management server 50 , a communication base station 150 and an information terminal 70 are connected to the network 130 . The management server 50 can exchange data with the communication base station 150 , the crane 1 control device 60 , and the external information terminal 70 connected to the network 130 .

[0107] The communication base station 150 is, for example, a base station for a mobile phone communication line. Upon receiving the operation information data of the crane 1 outputted to the outside by the transmission processing unit 612 of the crane control device 60 via the transmission unit 626 , the communication base station 150 transmits the data to the management server 50 via the network 130 .

[0108] The management server 50 is connected to a crane operation information database 140 and an information providing destination database 160 recording the providing destinations of the operation information. The management server 50 stores the operation information data received from the control device 60 of the crane 1 in the operation information database 140.

[0109] Furthermore, the management server 50 transmits the operating information data stored in the operating information database 140 to the information terminal 70 via the network 130. The management server 50 determines the destination of the information based on the contents of the information providing destination database 160.

[0110] The transmission of the above-mentioned operation information data may be performed only when requested from the information terminal 70 side.

[0111] In this manner, the operation information data outputted to the outside by the transmission processing unit 612 of the control device 60 of the crane 1 is provided to a manager or the like who uses the external information terminal 70 .

[0112] The information management system 100 that provides the operating information data is an example and is not limited to the above. For example, the management server 50 may be omitted and the operating information data may be directly provided to the pre-registered information terminal 70 via the network 130 .

[0113] [Technical Effects of Embodiments of the Invention]

[0114] As described above, the controller 61 of the control device 60 of the crane 1 includes the monitoring processing unit 611 for monitoring whether the wear condition of the winch drum 361 is satisfied, and the display device 622 for notifying when the wear condition is satisfied.

[0115] Therefore, the worker can clearly recognize the occurrence of wear that may be caused to the winch drum 361 by the hoisting rope 32 .

[0116] It should be noted that, regarding the wear generation conditions, fixed conditions whose contents do not change are exemplified in the above-mentioned embodiment, conditions may be automatically updated by gradual learning using a reinforcement learning function.

[0117] Furthermore, the monitoring processing unit 611 monitors the stacking state of the hoisting rope 32 wound on the winch drum 361 , and thus can more easily identify the occurrence of wear that may occur in the hoisting rope 32 without directly measuring the wear that occurs in the winch drum 361 .

[0118] It should be noted that the wear generation conditions are not limited to the conditions where wear generation is foreseeable as exemplified in the embodiment, and may be conditions where the wear amount of the hoisting rope 32 is directly measured in the winch drum 361 and judgment is made based on the measured value.

[0119] Furthermore, the wear-generating conditions determined by the monitoring processing unit 611 include conditions that are satisfied when using the first layer of the hoisting rope 32 wound on the winch drum 361. Therefore, even if the wear generated in the winch drum 361 is not directly measured, the wear generated on the periphery of the winding portion 362 of the winch drum 361 can be predictively detected and the staff can be identified by the wear.

[0120] In addition, other wear-generating conditions determined by the monitoring processing unit 611 are set as conditions related to the flange adjacent movement amount, and the flange adjacent movement amount is the movement amount of the hoisting rope 32 at a position adjacent to the drum flange 363. Therefore, even if the wear generated in the winch drum 361 is not directly measured, the wear generated in the drum flange 363 of the winch drum 361 can be predictively detected and the staff can identify the wear.

[0121] It should be noted that the conditions related to the above-mentioned flange adjacent movement amount are not limited to the conditions exemplified in the embodiment, and may be set such that the ratio of the flange adjacent movement amount to a specified period or a specified movement amount exceeds a threshold or the total amount of the flange adjacent movement amount exceeds a threshold.

[0122] In addition, the controller 61 has a sending processing unit 612 that stores the operating information of the crane, wherein the operating information of the crane includes the moving distance and notification time of the hoisting rope 32 during the period when the wear-generating conditions of the winch drum 361 are met, and information indicating the distribution of the size of the rope tension. Therefore, the situation of the crane 1 when the wear-generating conditions are met can be analyzed later, and countermeasures against the wear can be taken.

[0123] Furthermore, the transmission processing unit 612 divides the crane operation information into a plurality of sections and stores information related to the wear occurrence conditions for each section of the operation information. This allows for more detailed analysis of the state of the crane 1 when the wear occurrence conditions are met.

[0124] Specifically, when a condition related to the amount of adjacent flange movement is used as a wear-initiating condition, the rope tension value range is divided into multiple categories as load information related to the load acting on the hoisting rope 32, and the amount of adjacent flange movement is stored for each category of this load information. This allows the magnitude of the rope tension at the time of wear caused by adjacent flange movement to be determined, enabling more detailed analysis of the crane 1's condition when the wear-initiating condition is met.

[0125] Although rope tension is exemplified as the load acting on the hoisting rope 32, rope tension can also be referred to as a load acting on the drum. When referred to as "load acting on the hoisting rope (wire rope)", the load acting on the winch drum is also considered to be included.

[0126] Furthermore, the amount of adjacent flange movement may be stored by dividing the amount of adjacent flange movement into each value of the rope tension as in the above embodiment, or by dividing the amount of adjacent flange movement into crane operation, load hanging operation, or excavation operation.

[0127] Furthermore, the sending processing unit 612 outputs the stored crane operation information to the outside of the crane, so that not only the staff operating the crane 1 but also external managers can analyze the situation of the crane 1 when the wear conditions are met and take countermeasures against the wear.

[0128] Furthermore, the monitoring processing unit 611 displays, on the display device 622, a display screen when the wear-initiating condition is met, a layer column display indicating the layer and column where the unwound portion of the hoisting rope 32 wound around the winch drum 361 is located. This allows the operator to associate the occurrence of wear with the position of the unwound portion, allowing them to recognize the position.

[0129] When the unleashed portion of the hoisting rope 32 becomes the first layer, the monitoring processing unit 611 displays the fact that the first layer has been reached as the first icon N1 on the display device 622 separately from the layer list display.

[0130] Therefore, the worker can clearly recognize the occurrence of wear due to use of the first layer.

[0131] [other]

[0132] Furthermore, the details shown in the embodiments of the above invention can be appropriately modified without departing from the spirit of the invention.

[0133] For example, the measuring unit 628 is configured to include the distance measuring device 629 and the rotation amount detecting device 630 , but the present invention is not limited thereto.

[0134] For example, the rotation amount detection device 630 can be omitted from the measuring unit 628. The distance measurement device 629 can easily obtain information about the arrangement of the hoisting ropes 32 wound on the winch drum 361. Furthermore, the position of the row of hoisting ropes 32 currently being wound or unwound changes slightly during a single rotation. By detecting this change using the distance measurement device 629, it is possible to determine the approximate degree of rotation of the current row of hoisting ropes 32. Therefore, the distance measurement device 629 can also determine the amount of movement of the hoisting ropes 32 when the wear-inducing condition is met, and thus the rotation amount detection device 630 can be omitted from the measuring unit 628.

[0135] Furthermore, the measuring unit 628 may be configured such that the distance measuring device 629 is omitted.

[0136] For example, when the outer diameter of the hoisting rope 32, the outer diameter of the winding portion 362 of the winch drum 361, the distance between the two drum flanges 363, and the like are predetermined values, the total rotation amount of the winch drum 361 from a reference position (e.g., the position of the winch drum 361 when the hoisting rope 32 is fully unwound) can be used to determine the layer information of the hoisting rope 32 currently being wound or unwound. Therefore, by constantly detecting the total rotation amount of the winch drum 361 using the rotation amount detection device 630, the layer information and the amount of movement of the hoisting rope 32 when the wear-inducing condition is met can be determined, and a configuration can also be adopted in which the distance measurement device 629 is removed from the measurement unit 628.

[0137] Furthermore, wear generation can be measured without using either the distance measuring device 629 or the rotation amount detecting device 630. For example, a sensor for detecting whether the hoisting rope 32 is moving can be provided on the drum flange 363 side of the winch drum 361 to detect the first row, etc.

[0138] Furthermore, in the above embodiment, the monitoring device for the winch drum 361 of the hoisting winch 36 is exemplified, but a monitoring device having the same structure may also be provided for the winch drum of the pitching winch 42 .

[0139] Also, in the above-described embodiment, an example in which the monitoring device is provided at the winch drum of the crawler crane is shown, but the present application is not limited to the crawler crane, and can be applied to all cranes having a winch drum, such as a harbor crane, a bridge crane, a cantilever crane, a gantry crane, an unloader, a fixed crane, and the like, in addition to a wheel crane, a truck crane, and the like.

[0140] Also, the present application is not limited to a crane having a load hook, and can be applied to a crane having an accessory such as a suspended magnet, a ground bucket, and the like.

[0141] Also, in the above-described embodiment, the notification is performed in accordance with the satisfaction of the wear generation condition, but for example, the notification can be canceled by input from the input unit 621.

[0142] Also, when the first column winding or unwinding is set as the wear generation condition, the notification processing can be canceled at a time point at which the state in which the wear generation condition is satisfied is released.

[0143] Also, it is mentioned that the total amount of the flange adjacent movement amount exceeding the threshold value can be set as the wear generation condition, but at this time, if the threshold value is once exceeded, it is difficult to release the state in which the wear generation condition is satisfied, and in relation to this, for example, the notification processing can be canceled at a time point at which the first column winding or unwinding state is released. At this time, the notification processing can be restarted at a time point at which the first column winding or unwinding state is generated again.

[0144] Also, it is mentioned that the transmission processing unit 612 can store and record the cumulative value of the execution time of the above-described notification as the operation information of the crane 1, and output to the outside, but the execution time of the notification can accumulate all times in which the wear generation condition is satisfied, or can accumulate times in which the notification is performed (times in which the first column winding or unwinding is performed).

Claims

1. A monitoring device for a winch drum of a crane, comprising: a monitoring mechanism for monitoring whether a wear condition in which wear of the winch drum is expected to occur is satisfied; and The notification mechanism performs notification in response to the establishment of the wear occurrence condition.

2. The winch drum monitoring device according to claim 1, wherein: The monitoring mechanism monitors the layered state of the wire rope wound on the winch drum.

3. The winch drum monitoring device according to claim 1 or 2, wherein: The wear occurrence condition includes a condition that is satisfied when the first layer of wire rope wound around the winch drum is used.

4. The winch drum monitoring device according to claim 1 or 2, wherein: The winch drum has a winding portion for winding a wire rope and drum flanges protruding radially at both ends of the winding portion. The wear generation condition is a condition related to a flange adjacent movement amount, and the flange adjacent movement amount is a movement amount of the wire rope at a position adjacent to the drum flange.

5. The winch drum monitoring device according to claim 1 or 2, wherein: The operation information of the crane during the period when the wear occurrence condition is satisfied is stored.

6. The winch drum monitoring device according to claim 5, wherein: The operation information of the crane is divided into a plurality of parts, and information related to the wear occurrence condition is stored for each part of the operation information.

7. The winch drum monitoring device according to claim 6, wherein: The winch drum has a winding portion for winding a wire rope and drum flanges protruding radially at both ends of the winding portion. The wear generating condition is a condition related to the flange adjacent movement amount, wherein the flange adjacent movement amount is the movement amount of the wire rope at a position adjacent to the drum flange. Load information related to the load acting on the wire rope is divided into a plurality of parts, and the flange adjacent movement amount is stored for each part of the load information.

8. The winch drum monitoring device according to claim 1 or 2, wherein: The notification means displays a layer column indicating the layer and column in which the unwound portion of the wire rope wound on the winch drum is located, and also displays the display when the wear occurrence condition is satisfied.

9. The winch drum monitoring device according to claim 8, wherein: When the unwound portion of the wire rope becomes the first layer, the notification means displays information indicating that the portion has become the first layer separately from the layer list display.

10. A monitoring device for a winch drum of a crane, comprising: a monitoring mechanism for monitoring whether a wear condition of the winch drum is met; and a notification mechanism for notifying upon the establishment of the wear-generating condition; in, The winch drum has a winding portion for winding a wire rope and drum flanges protruding radially at both ends of the winding portion. The wear generation condition is a condition related to a flange adjacent movement amount, and the flange adjacent movement amount is a movement amount of the wire rope at a position adjacent to the drum flange.

11. A monitoring device for a winch drum of a crane, comprising: a monitoring mechanism for monitoring whether a wear condition of the winch drum is met; and a notification mechanism for notifying upon the establishment of the wear-generating condition; in, storing the operation information of the crane during the period when the wear generation condition is satisfied, The operation information of the crane is divided into a plurality of parts, and information related to the wear generation condition is stored for each part of the operation information. The winch drum has a winding portion for winding the wire rope and drum flanges protruding radially at both ends of the winding portion. The wear generating condition is a condition related to the flange adjacent movement amount, wherein the flange adjacent movement amount is the movement amount of the wire rope at a position adjacent to the drum flange. Load information related to the load acting on the wire rope is divided into a plurality of parts, and the flange adjacent movement amount is stored for each part of the load information.

Images