WO2020054463A1 - Hoist, hoist operation restriction method and hoist life estimation method, and hoist operation restriction system and hoist life estimation system - Google Patents

Hoist, hoist operation restriction method and hoist life estimation method, and hoist operation restriction system and hoist life estimation system Download PDF

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Publication number
WO2020054463A1
WO2020054463A1 PCT/JP2019/034203 JP2019034203W WO2020054463A1 WO 2020054463 A1 WO2020054463 A1 WO 2020054463A1 JP 2019034203 W JP2019034203 W JP 2019034203W WO 2020054463 A1 WO2020054463 A1 WO 2020054463A1
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Prior art keywords
hoist
inching
storage device
motor
energized
Prior art date
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PCT/JP2019/034203
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French (fr)
Japanese (ja)
Inventor
京介 山野
Original Assignee
株式会社日立産機システム
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Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to CN201980057001.0A priority Critical patent/CN112638816B/en
Priority to JP2020545915A priority patent/JP7066867B2/en
Publication of WO2020054463A1 publication Critical patent/WO2020054463A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/46—Position indicators for suspended loads or for crane elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/12—Driving gear incorporating electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear

Definitions

  • the present invention relates to a hoist, a method for restricting operation of a hoist, a method for estimating the life of a hoist, an operation restriction system for a hoist, and a system for estimating the life of a hoist.
  • Patent Document 1 discloses a technique in which the number of times of operation of a hoist is measured in accordance with a load level to thereby estimate a life and determine an inspection time.
  • the product life and parts replacement time of the hoist differ depending on the usage environment, total operation time and start frequency. Above all, the start frequency leads to deterioration of the insulation of the motor due to the start current (generally 5 to 6 times the rated current), failure or failure due to contact wear due to opening and closing of the electromagnetic contactor, lining wear of the electromagnetic brake, and the like.
  • the jogging operation for starting and stopping the hoist in a very short time is performed.
  • the inching operation is performed continuously, so that the electric motor, the electromagnetic contactor, the electromagnetic brake, and the like may be damaged by continuous starting and stopping.
  • the greater the number and frequency of successive inchings the sooner the product is supposed to be, the sooner the parts will be replaced and the longer the product life will be. Therefore, unscheduled repair / inspection work and product replacement will occur.
  • Patent Literature 1 the number of times of operation of the hoist according to the load level is measured. However, since the number of times of inching operation is not taken into account, continuous inching operation is performed depending on the environment used and the skill of the driver. If this is done, it is not possible to properly estimate the service life or judge the inspection time.
  • An object of the present invention is to provide a hoist, a method for restricting operation of a hoist, a method for estimating the life of a hoist, and a hoist capable of estimating a component replacement time and a product life in consideration of the number of inching operations. And a system for estimating the life of the hoist.
  • the present invention is characterized in that a hook for hanging a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor.
  • a storage device for storing operation information of the electric motor in accordance with the operation input device, wherein the storage device is energized to the electric motor and then de-energized for less than a predetermined time. It is to store the number of times of a certain inching operation.
  • the features of the present invention include a hook for hanging a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and an operation input device.
  • a storage device for storing operation information of the electric motor according to the operation control method wherein the storage device is energized to the electric motor and then de-energized for less than a predetermined time. The number of inching operations is stored, and when the average value of the predetermined order of the number of inching operations exceeds a prescribed value, the operation of the inching operation from the operation input device is restricted.
  • the present invention is characterized in that a hoist provided with a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor.
  • a hoist provided with a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor.
  • the present invention is characterized in that a hoist provided with a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor.
  • a machine life estimating system for estimating the service life of a hoist based on the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time.
  • a hoist a method for limiting operation of a hoist, a method for estimating the life of a hoist, and a hoist capable of estimating a component replacement time and a product life in consideration of the number of inching operations And a system for estimating the life of the hoist.
  • FIG. 1 is a perspective view illustrating a configuration of an electric chain block body according to an embodiment of the present invention.
  • 1 is a front view illustrating a configuration of an electric chain block body according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a control configuration according to the embodiment of the present invention. It is a figure which shows the pattern which performs determination of the frequency
  • FIG. 1 is a perspective view showing the configuration of the electric chain block body according to the embodiment of the present invention
  • FIG. 2 is a front view showing the configuration of the electric chain block body according to the embodiment of the present invention.
  • the electric chain block 100 includes a motor 1, a speed reducer 2, an electromagnetic brake 3, an upper hanger 4, an operation input device 5, a chain bucket 6, a sprocket 7, a hook 8, a chain 9, and a controller 10.
  • the electric chain hoist 4 is attached to the electric chain block 100 for hanging the electric chain block 100 on a beam or the like of a building.
  • an electric motor 1 is attached to the electric chain block 100, and the electric motor 1 is connected to a reduction unit 2 for reducing the rotation generated by the electric motor 1.
  • the rotational force of the electric motor 1 decelerated by the reduction unit 2 is transmitted to the sprocket 7.
  • the electric motor 1 is provided with an electromagnetic brake 3 for stopping rotation generated by the electric motor 1.
  • a chain 9 meshes with the sprocket 7.
  • the electric chain block 100 is provided with a control unit 10 for controlling operations of the electric motor 1 and the electromagnetic brake 3.
  • FIG. 3 is a block diagram showing a control configuration according to the embodiment of the present invention.
  • the electric chain block 100 includes a storage device 24 (FIG. 3) for recording the number of times of starting and the number of times of inching.
  • the storage device 24 includes a central processing unit 24a (CPU) for performing various operations and an erasable / rewritable storage unit 24b (RAM: Random Access Memory) for holding data.
  • a storage medium 31 such as a USB memory can be connected to the storage device 24, and data stored in the storage device 24 can be output to the outside via the storage medium 31.
  • the storage device 24 may be provided with a wireless device 32 and output to the outside via the wireless device 32. Further, the display device 33 may be provided in the storage device 24, and the data stored in the storage device 24 may be displayed on the display device 33.
  • the energization / de-energization of electric power to the electric motor 1 is performed by the operation input device.
  • the electromagnetic contactor 21 in the control unit 10 is closed by the operation input of the operation input device 5 by pressing the operation button, and the electric motor 1 is energized.
  • the electromagnetic contactor 21 is opened by pressing the operation button, and the power supply to the electric motor 1 is de-energized.
  • the electromagnetic contactor 21 opens and closes a switch by operating the operation input device 5 to turn on and off the electric motor 1.
  • the electromagnetic brake 3 is also energized and the electromagnetic brake 3 is released, and the electric motor 1 starts rotating.
  • the electromagnetic brake 3 operates to apply a braking force to the electric motor 1 when not energized, and to release the braking force of the electric motor 1 when energized.
  • the rotational power of the electric motor 1 is reduced to a predetermined rotational speed by the reduction unit 2, and the rotation is transmitted to the chain 9 (connection member) by the sprocket 7 connected to the final reduction gear, and the hook 8 is wound up via the chain 9. Perform the lowering.
  • the chain 9 functions as a connecting member that connects the hook 8 and the electric motor 1. A hanging load is hung on the hook 8.
  • the suspended load is raised and lowered.
  • the chain 9 is stored in the chain bucket 6 attached to the electric chain block 100 main body when the chain 9 opposite to the hook 8 is wound up, and is discharged when the chain 9 is lowered.
  • FIG. 4 is a diagram showing a pattern for determining the number of times of starting, the number of times of inching and the number of times of continuous inching by inputting operation buttons of the operation input device.
  • FIG. 5 is a flowchart for counting the number of times of starting, the number of times of inching and number of continuous inchings.
  • FIG. 7 is a flowchart for calculating the starting frequency and the inching frequency, and
  • FIG. 8 is a flowchart for ranking the inching frequency.
  • the electric chain block 100 including the storage device 24 that counts and stores the number of times of starting, the number of times of inching, and the number of times of continuous inching is provided. Can be considered.
  • an operation button input of the operation input device 5 second input indicating an energized / de-energized (open / closed) state of the electromagnetic contactor 21, third input from a current sensor 22 for detecting a load current of the electric motor 1, Fourth, an input indicating the open state of the electromagnetic brake 3, fifth, an input from a rotation speed detecting device 23 such as an encoder for detecting the rotation speed of the electric motor 1, and sixth, a hook position detecting device 25 for detecting a hook position. This is the input from.
  • the sixth detection of the position of the hook is performed by monitoring the position of the hook 8 of the electric chain block 100 based on the state of the hook, the chain, the suspended load, and the hanging device.
  • the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the input operation of the operation input device 5.
  • the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the energized / deenergized state of the electromagnetic contactor 21.
  • the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the load current detected by the current sensor 22.
  • the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the release state of the electromagnetic brake 3.
  • the storage device 24 stores the number of inching operations, the number of start operations, and the number of continuous inching operations according to the rotation speed detected by the rotation speed detection device 23.
  • the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the position of the hook 8 detected by the hook position detecting device 25.
  • the start of the hoist is determined by any one or a combination of a plurality of inputs, and the total number of start, inching, and inching operations is performed. The number of successive inching operations and the inching frequency are stored.
  • FIG. 4 is a diagram showing an example of a pattern of the number of starts, the number of inchings, and the number of continuous inchings by the operation button input of the operation input device. The details of each determination method will be described with reference to FIGS.
  • the upper part shows a plurality of patterns of operation button inputs of the operation input device operated in a time series during, for example, one hour, and the lower part shows the judgment results corresponding to each pattern.
  • the input ON time continues for X seconds (predetermined time) or more, and the operation is turned OFF after Y seconds (predetermined time) elapses from the timing when the input ON operated before the operation is turned OFF. Is determined to be a normal start.
  • the input ON time (first energization) continues for less than X seconds, and the input ON operated before the operation is turned OFF (first non-energization), and is operated again to turn the input ON (
  • second energization is performed and the input is turned OFF (second non-energization) in less than Y seconds (predetermined time)
  • the number of consecutive inchings is determined to be two.
  • the storage device 24 stores the number of times as a continuous inching operation.
  • This embodiment shows an example in which the number of consecutive inchings is five. Similarly, for the remaining inputs, the normal start and the continuous inching count (5 times) are sequentially determined.
  • the number of times the input ON was operated during one hour was 11 times
  • the number of inchings was 9 times
  • the number of consecutive inchings was 5 times
  • the 2nd was 3 times
  • the 3rd was 1 time. Times
  • the starting frequency is determined to be 11 times
  • the inching frequency is determined to be 9 times.
  • FIG. 5 is a flowchart for counting the number of starts, the number of inchings, and the number of continuous inchings.
  • FIG. 6 is a flowchart for ranking the number of continuous inchings.
  • step 101 the central processing unit 24a of the storage device 24 checks the state of the operation input (step 101), and when the operation input is ON (Yes in step 101), counts the time while the input is ON (step 101).
  • step 102 is performed.
  • step 101 when the operation input is OFF (No in step 101), the determination in step 101 is repeated.
  • step 103 when the operation input is turned off (Yes in step 103), it is confirmed whether continuous inching is being performed (step 104). Since the number of consecutive inchings is 0 in the initial value, the process proceeds to Yes in step 104.
  • Step 106 when the input ON time is shorter than X seconds (Yes in Step 105), the number of consecutive inchings is set to 1 (Step 106), and the number of inchings is set to +1 and stored in the storage unit 24b (Step 107). .
  • the counting of the inching interval is started (step 108), and finally the number of starts is set to +1 and stored in the storage unit 24b (step 109).
  • step 109 the process proceeds to the number of start times + 1 (step 109).
  • step 110 After the number of consecutive inchings becomes +1 in step 106, the process returns to step 101, and when the next operation input is ON (Yes in step 101) and the process reaches step 104, the process proceeds to No and determines continuous inching. Proceed to processing (step 110). If the inching interval started counting in step 108 is less than Y seconds (Yes in step 110), it is determined that the next operation is also inching, and the number of successive inchings is stored as +1 in the storage unit 24b (step 111). . If the inching interval is equal to or longer than Y seconds (No in Step 110), the process proceeds to the continuous inching count ranking process in FIG. 6 (Step 112). In this way, the start / inching count processing is executed, and the inching count is stored in the storage unit 24b.
  • the central processing unit 24a compares the number with the third number (step 202). If the number is not less than the third place (No in step 202), the value of the number N is stored in the storage unit 24b as the third place (step 203). Next, the central processing unit 24a compares the number N with the second place (step 204), and if not less than the second place (No in step 204), the second place becomes the third place (step 205). The number N is stored as the second number in the storage unit 24b (step 206). Next, the central processing unit 24a compares the number N with the number one place (step 207).
  • step 207 If the number is not less than the number one place (No in step 207), the number one place becomes the number two place (step 208).
  • the number N is stored in the storage unit 24b as the number-one place (step 209).
  • step 210 the number of continuous inchings is set to 0 (cleared) (step 210)
  • step 210 the number N is set to 0 (cleared)
  • the process returns to the number-of-starts / inchings counting process. If the determinations in steps 202, 204, and 207 are Yes, the process proceeds to steps 210 and 211.
  • the central processing unit 24a counts for one minute (step 301), and when one minute has elapsed (Yes in step 302), sets 59 as a variable M in the storage unit 24b (step 301). 303), a loop for updating the number of times is started (step 304).
  • the array is used in the loop of steps 305 and 306, and the starting frequency and the inching frequency of 0 to 59 minutes before are recorded in the arrays A and B of the storage unit 24b in the variables of 0 to 59, respectively.
  • the process exits from the loop of step 304, and stores the latest start count and inching frequency in the arrays A [0] and B [0] of the storage unit 24b, respectively.
  • the central processing unit 24a calculates the difference between the number of starts A [0] and the number of inchings B [0] before 0 minutes and the number of starts A [59] and the number of inchings B [59] 59 minutes before, and calculates one hour.
  • the start frequency and the inching frequency between the two are stored in the storage unit 24b (step 308), and the process proceeds to the inching frequency ranking process of FIG.
  • the inching frequency ranking process in FIG. 8 an example is shown in which the highest frequency in the past is recorded in the first to third places, as in FIG.
  • the inching frequency ranking process is performed every hour (step 401 and step 402).
  • the inching frequency at the elapse of one hour (Yes in step 402) is stored in the storage unit 24b as the frequency N (step 403), and the central processing unit 24a compares the number with the third number of times (step 404). If the number is not less than the third place (No in step 404), the value of the number N is recorded in the storage unit 24b as the third place (step 405).
  • the central processing unit 24a compares the number N with the second place (step 406).
  • the second place becomes the third place (step 407).
  • the number N is recorded as the second number in the storage unit 24b (step 408).
  • the central processing unit 24a compares the number N with the first place (step 409). If the number is not less than the first place (No in step 410), the first place is changed to the second place (step 410). The number N is recorded in the storage unit 24b as the number one place (step 411). Finally, the continuous inching count is cleared (cleared) to 0 (step 412), and the process returns to the starting count / inching frequency counting process.
  • the number of starts, the number of inchings, the number of continuous inchings, the starting frequency, and the inching frequency are counted.
  • the operation of the hoist can be limited by referring to these count results.
  • the operation is restricted for the inching operation from the operation input device 5.
  • the operation is restricted for the inching operation from the operation input device 5.
  • the average of the predetermined order of the number of consecutive inchings exceeds a specified value, or the average of the predetermined order of inching frequency (top three in this embodiment) is specified.
  • the value exceeds the value, there is a method of not accepting an operation input for less than X seconds (predetermined time) and restricting the operation so that the inching operation cannot be performed.
  • the life of the hoist may be estimated based on the number of inching operations stored in the storage device 24.
  • a service life estimation method for estimating the service life of the hoist there are a method of estimating the service life of component replacement and a method of estimating the service life of the entire product.
  • a value obtained by dividing the difference between the average value of the predetermined order of the start frequency and the inching frequency (the top three in this embodiment) by the inching frequency is used as the component replacement life and the product life.
  • Pieces of information are output from the storage device 24 to a storage medium 31 such as a USB, a wireless device 32 such as Wifi (registered trademark), and a display 33 such as a 7-segment LED or a liquid crystal display, so that the customer and maintenance work can be performed. It is possible to output information to the outside such as a member.
  • a storage medium 31 such as a USB
  • a wireless device 32 such as Wifi (registered trademark)
  • a display 33 such as a 7-segment LED or a liquid crystal display
  • the operation limitation and the life estimation in the present embodiment may be performed on a cloud by providing the storage device 24 in, for example, a cloud.
  • This embodiment can be easily applied to a cloud system.
  • SYMBOLS 1 Electric motor, 2 ... Deceleration part, 3 ... Electromagnetic brake, 4 ... Upper hanging tool, 5 ... Operation input device, 6 ... Chain bucket, 7 ... Sprocket, 8 ... Hook, 9 ... Chain, 10 ... Control part, 21 ... Electromagnetic Contactor, 22 current sensor, 23 rotational speed detecting device, 24 storage device, 24a central processing unit, 24b storage unit, 25 hook position detecting device, 31 storage medium, 32 wireless device, 33 ... Display, 100 ... Electric chain block

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  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The purpose of the present invention is to provide a hoist, a hoist operation restriction method and a hoist life estimation method, and a hoist operation restriction system and a hoist life estimation system, whereby it is possible to estimate the timing of component replacement and product life in consideration of the number of times an inching operation has been carried out. To achieve this, the present invention comprises: an electric motor 1 for lifting or lowering a hook 8 for suspending a load; an operation input device 5 for energizing/de-energizing the electric motor 1; and a storage device 24 for storing operating information of the electric motor 1 corresponding to the operation input device 5. The storage device 24 stores the number of times an inching operation in which the electric motor 1 is energized and then de-energized for less than a predetermined period of time has been carried out. Furthermore, if the number of times the inching operation has been carried out as stored in the storage device 24 exceeds a predetermined value, operation restrictions are imposed with respect to the inching operation from the operation input device 5. Moreover, the life of a hoist 1 is estimated on the basis of the number of times the inching operation has been carried out as stored in the storage device 24.

Description

巻上機、巻上機の動作制限方法及び巻上機の寿命推測方法、並びに巻上機の動作制限システム及び巻上機の寿命推測システムHoist, method for restricting operation of hoist, method for estimating life of hoist, operation restriction system for hoist, and system for estimating life of hoist
　本発明は、巻上機、巻上機の動作制限方法及び巻上機の寿命推測方法、並びに巻上機の動作制限システム及び巻上機の寿命推測システムに関する。 The present invention relates to a hoist, a method for restricting operation of a hoist, a method for estimating the life of a hoist, an operation restriction system for a hoist, and a system for estimating the life of a hoist.
　巻上機の寿命測定を行う技術として、例えば特許文献１が提案されている。特許文献１では、荷重レベルに応じて巻上機の作動回数を計測することにより、寿命推定と点検時期の判断を行うようにした技術が開示されている。 As a technique for measuring the service life of a hoist, for example, Patent Document 1 is proposed. Patent Literature 1 discloses a technique in which the number of times of operation of a hoist is measured in accordance with a load level to thereby estimate a life and determine an inspection time.
特開平２－８９７９８号公報JP-A-2-89798
　巻上機の製品寿命や部品交換時期は、使用される環境、総運転時間や始動頻度によって異なる。中でも始動頻度については、始動電流(一般に定格電流の５～６倍の電流)による電動機の絶縁劣化、電磁接触器の開閉による接点摩耗・電磁ブレーキのライニング摩耗等による不具合・故障につながる。 製品 The product life and parts replacement time of the hoist differ depending on the usage environment, total operation time and start frequency. Above all, the start frequency leads to deterioration of the insulation of the motor due to the start current (generally 5 to 6 times the rated current), failure or failure due to contact wear due to opening and closing of the electromagnetic contactor, lining wear of the electromagnetic brake, and the like.
　巻上機では、吊り荷の位置を微調整する際に、極短い時間で巻上機を始動・停止させる寸動操作(以下インチング操作)が行われる。使用される環境・運転者の技量によっては、このインチング操作が連続で行われる為、電動機・電磁接触器および電磁ブレーキ等が連続の始動・停止によってダメージを受ける可能性がある。連続したインチングの回数および頻度が多いほど、製品が想定していた時間よりも早く、部品交換時期や製品寿命を迎えてしまう為、予定外の補修・点検作業や製品交換が発生してしまう。 In the hoist, when the position of the suspended load is finely adjusted, the jogging operation (hereinafter, inching operation) for starting and stopping the hoist in a very short time is performed. Depending on the environment to be used and the skill of the driver, the inching operation is performed continuously, so that the electric motor, the electromagnetic contactor, the electromagnetic brake, and the like may be damaged by continuous starting and stopping. The greater the number and frequency of successive inchings, the sooner the product is supposed to be, the sooner the parts will be replaced and the longer the product life will be. Therefore, unscheduled repair / inspection work and product replacement will occur.
　特許文献１では、荷重レベルに応じた巻上機の作動回数を計測しているが、インチング操作の回数を考慮していない為、使用される環境・運転者の技量によって、連続したインチング操作が行われた場合には、適切な寿命の推測や点検時期の判断を行うことが出来ない。 In Patent Literature 1, the number of times of operation of the hoist according to the load level is measured. However, since the number of times of inching operation is not taken into account, continuous inching operation is performed depending on the environment used and the skill of the driver. If this is done, it is not possible to properly estimate the service life or judge the inspection time.
　本発明の目的は、インチング操作の回数を考慮した部品交換時期・製品寿命の推測を行うことのできる巻上機、巻上機の動作制限方法及び巻上機の寿命推測方法、並びに巻上機の動作制限システム及び巻上機の寿命推測システムを提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a hoist, a method for restricting operation of a hoist, a method for estimating the life of a hoist, and a hoist capable of estimating a component replacement time and a product life in consideration of the number of inching operations. And a system for estimating the life of the hoist.
　上記目的を達成するために本発明の特徴とするところは、吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機において、前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶することにある。 In order to achieve the above object, the present invention is characterized in that a hook for hanging a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor. A storage device for storing operation information of the electric motor in accordance with the operation input device, wherein the storage device is energized to the electric motor and then de-energized for less than a predetermined time. It is to store the number of times of a certain inching operation.
　また本発明の特徴とするところは、吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機の動作制限方法であって、前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶し、前記インチング操作の回数の所定順位の平均値が規定値を超えた場合には、前記操作入力装置からの前記インチング操作に対し動作制限を行うことにある。 Further, the features of the present invention include a hook for hanging a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and an operation input device. A storage device for storing operation information of the electric motor according to the operation control method, wherein the storage device is energized to the electric motor and then de-energized for less than a predetermined time. The number of inching operations is stored, and when the average value of the predetermined order of the number of inching operations exceeds a prescribed value, the operation of the inching operation from the operation input device is restricted.
　さらに本発明の特徴とするところは、吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機の寿命推測方法であって、前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶し、前記インチング操作の回数に基づいて巻上機の寿命を推測することにある。 Further features of the present invention include a hook for hanging a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and an operation input device. A storage device for storing operation information of the electric motor in response to the operation of the electric motor, wherein the storage device is energized to the electric motor and then de-energized for less than a predetermined time. An object of the present invention is to store the number of inching operations and estimate the service life of the hoist based on the number of inching operations.
　さらにまた本発明の特徴とするところは、吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置とを備えた巻上機の動作制限システムであって、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数が所定値を超えた場合には、前記操作入力装置からの前記インチング操作に対し動作制限を行うことにある。 Furthermore, the present invention is characterized in that a hoist provided with a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor. An operation limiting system of the machine, wherein when the number of inching operations in which the electric motor is energized and then de-energized is less than a predetermined time exceeds a predetermined value, the inching operation from the operation input device is performed. It is to restrict the operation to the operation.
　また、本発明の特徴とするところは、吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置とを備えた巻上機の寿命推測システムであって、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数に基づいて巻上機の寿命を推測することにある。 Further, the present invention is characterized in that a hoist provided with a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor. A machine life estimating system for estimating the service life of a hoist based on the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time.
　本発明によれば、インチング操作の回数を考慮した部品交換時期・製品寿命の推測を行うことのできる巻上機、巻上機の動作制限方法及び巻上機の寿命推測方法、並びに巻上機の動作制限システム及び巻上機の寿命推測システムを提供することができる。 Advantageous Effects of Invention According to the present invention, a hoist, a method for limiting operation of a hoist, a method for estimating the life of a hoist, and a hoist capable of estimating a component replacement time and a product life in consideration of the number of inching operations And a system for estimating the life of the hoist.
本発明の実施例に係る電気チェーンブロック本体の構成を示した斜視図である。1 is a perspective view illustrating a configuration of an electric chain block body according to an embodiment of the present invention. 本発明の実施例に係る電気チェーンブロック本体の構成を示した正面図である。1 is a front view illustrating a configuration of an electric chain block body according to an embodiment of the present invention. 本発明の実施例に係る制御構成を示したブロック図である。FIG. 2 is a block diagram illustrating a control configuration according to the embodiment of the present invention. 操作入力装置の操作ボタン入力による始動回数、インチング回数および連続インチング回数の判定を行うパターンを示す図である。It is a figure which shows the pattern which performs determination of the frequency | count of a start by the operation button input of an operation input device, the frequency | count of inching, and the continuous frequency | count of inching. 始動回数、インチング回数および連続インチング回数のカウントを行うフローチャートである。It is a flowchart which counts the number of times of starting, the number of times of inching, and the number of times of continuous inching. 連続インチング回数のランク付けを行うフローチャートである。It is a flowchart which ranks the number of times of continuous inching. 始動頻度およびインチング頻度の計算を行うフローチャートである。It is a flowchart which performs calculation of a starting frequency and an inching frequency. インチング頻度のランク付けを行うフローチャートである。It is a flowchart which ranks the inching frequency.
　以下、本発明に係る巻上機の実施例について図面を用いて説明する。なお、巻上機の一例として電気チェーンブロックを用いて説明するが、本発明は以下の実施例に限定されるものではなく、本発明の技術的な概念の中で種々の変形例や応用例もその範囲に含むものである。 Hereinafter, embodiments of the hoist according to the present invention will be described with reference to the drawings. In addition, although an electric chain block will be described as an example of a hoist, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is included in the range.
　図１は本発明の実施例に係る電気チェーンブロック本体の構成を示した斜視図、図２は本発明の実施例に係る電気チェーンブロック本体の構成を示した正面図である。 FIG. 1 is a perspective view showing the configuration of the electric chain block body according to the embodiment of the present invention, and FIG. 2 is a front view showing the configuration of the electric chain block body according to the embodiment of the present invention.
　図１および図２を用いて、電気チェーンブロックの全体構成及び動作原理について説明する。電気チェーンブロック１００は、電動機１、減速部２、電磁ブレーキ３、上吊具４、操作入力装置５、チェーンバケット６、スプロケット７、フック８、チェーン９、制御部１０を有する。電気チェーンブロック１００には、電気チェーンブロック１００を建屋の梁等に吊り下げて設置するための上吊具４が取付けられている。また、電気チェーンブロック１００には電動機１が取付けられており、電動機１には電動機１で発生した回転を減速させるための減速部２が接続されている。減速部２で減速させた電動機１の回転力はスプロケット７に伝達される。電動機１には電動機１で発生した回転を停止させるための電磁ブレーキ３が取付けられている。スプロケット７にはチェーン９が噛み合っている。
また、電気チェーンブロック１００には、電動機１および電磁ブレーキ３の動作を制御する制御部１０が取り付けられている。 The overall configuration and operation principle of the electric chain block will be described with reference to FIGS. The electric chain block 100 includes a motor 1, a speed reducer 2, an electromagnetic brake 3, an upper hanger 4, an operation input device 5, a chain bucket 6, a sprocket 7, a hook 8, a chain 9, and a controller 10. The electric chain hoist 4 is attached to the electric chain block 100 for hanging the electric chain block 100 on a beam or the like of a building. Further, an electric motor 1 is attached to the electric chain block 100, and the electric motor 1 is connected to a reduction unit 2 for reducing the rotation generated by the electric motor 1. The rotational force of the electric motor 1 decelerated by the reduction unit 2 is transmitted to the sprocket 7. The electric motor 1 is provided with an electromagnetic brake 3 for stopping rotation generated by the electric motor 1. A chain 9 meshes with the sprocket 7.
The electric chain block 100 is provided with a control unit 10 for controlling operations of the electric motor 1 and the electromagnetic brake 3.
　次に、電気チェーンブロック１００の動作原理について図１～図３を用いて説明する。図３は本発明の実施例に係る制御構成を示したブロック図である。本実施例による電気チェーンブロック１００においては、始動回数およびインチング回数を記録する記憶装置２４（図３）を備えている。記憶装置２４には、各種の演算を行う中央演算処理部２４ａ（CPU）と、データを保持する消去・書き換え可能な記憶部２４ｂ（RAM:Random Access Memory)を備えている。記憶装置２４にはＵＳＢメモリ等の記憶媒体３１が接続可能であり、記憶装置２４に記憶されたデータは記憶媒体３１を介して外部に出力することができる。また、記憶装置２４に記憶されたデータを取り出す手段としては、記憶装置２４に無線機器３２を備え、無線機器３２を介して外部に出力するようにしても良い。さらには、記憶装置２４に表示器３３を備え、表示器３３に記憶装置２４に記憶されたデータを表示するようにしても良い。 Next, the operation principle of the electric chain block 100 will be described with reference to FIGS. FIG. 3 is a block diagram showing a control configuration according to the embodiment of the present invention. The electric chain block 100 according to the present embodiment includes a storage device 24 (FIG. 3) for recording the number of times of starting and the number of times of inching. The storage device 24 includes a central processing unit 24a (CPU) for performing various operations and an erasable / rewritable storage unit 24b (RAM: Random Access Memory) for holding data. A storage medium 31 such as a USB memory can be connected to the storage device 24, and data stored in the storage device 24 can be output to the outside via the storage medium 31. As means for extracting data stored in the storage device 24, the storage device 24 may be provided with a wireless device 32 and output to the outside via the wireless device 32. Further, the display device 33 may be provided in the storage device 24, and the data stored in the storage device 24 may be displayed on the display device 33.
　電動機１への電力の通電・非通電は操作入力装置によって行われる。作業者が操作入力装置５の通電の操作ボタンを操作すると、操作ボタンの押し込みにより、制御部１０内にある電磁接触器２１が操作入力装置５の操作入力によって閉じられ、電動機１に通電する。また、操作入力装置５の切の操作ボタンを操作すると、操作ボタンの押し込みにより、電磁接触器２１が開放され、電動機１への通電が非通電となる。電磁接触器２１は操作入力装置５の操作により、スイッチを開閉して電動機１への通電・非通電を行う。電動機１の通電と同時に、電磁ブレーキ３にも通電し電磁ブレーキ３が開放され、電動機１が回転を開始する。電磁ブレーキ３は非通電の時は電動機１に制動力を与え、通電時は電動機１の制動力を解除するように動作する。電動機１の回転動力は減速部２で所定の回転速度に減速され、最終減速段と連結されたスプロケット７により回転をチェーン９（接続部材）に伝達し、チェーン９を介してフック８の巻上げ、巻下げを行う。チェーン９はフック８と電動機１を接続する接続部材として機能する。フック８には、吊荷が吊るされる。フック８の巻上げ、巻下げ（昇降）に伴い、吊荷が巻上げ、巻下げされる。その際に、チェーン９は電気チェーンブロック１００本体に取付けられたチェーンバケット６にフック８と反対側のチェーン９が巻上げの際には収納され、巻下げの際には排出される。 (4) The energization / de-energization of electric power to the electric motor 1 is performed by the operation input device. When the operator operates the operation button for energizing the operation input device 5, the electromagnetic contactor 21 in the control unit 10 is closed by the operation input of the operation input device 5 by pressing the operation button, and the electric motor 1 is energized. Further, when the off operation button of the operation input device 5 is operated, the electromagnetic contactor 21 is opened by pressing the operation button, and the power supply to the electric motor 1 is de-energized. The electromagnetic contactor 21 opens and closes a switch by operating the operation input device 5 to turn on and off the electric motor 1. At the same time as the electric motor 1 is energized, the electromagnetic brake 3 is also energized and the electromagnetic brake 3 is released, and the electric motor 1 starts rotating. The electromagnetic brake 3 operates to apply a braking force to the electric motor 1 when not energized, and to release the braking force of the electric motor 1 when energized. The rotational power of the electric motor 1 is reduced to a predetermined rotational speed by the reduction unit 2, and the rotation is transmitted to the chain 9 (connection member) by the sprocket 7 connected to the final reduction gear, and the hook 8 is wound up via the chain 9. Perform the lowering. The chain 9 functions as a connecting member that connects the hook 8 and the electric motor 1. A hanging load is hung on the hook 8. As the hook 8 is raised and lowered (raised and lowered), the suspended load is raised and lowered. At this time, the chain 9 is stored in the chain bucket 6 attached to the electric chain block 100 main body when the chain 9 opposite to the hook 8 is wound up, and is discharged when the chain 9 is lowered.
　本実施例における始動回数、インチング操作回数、連続したインチング操作回数およびインチング頻度の判定手段および方法について、図３～８を参照して説明する。 The means and method for determining the number of starts, the number of inching operations, the number of consecutive inching operations and the frequency of inching in this embodiment will be described with reference to FIGS.
　図４は操作入力装置の操作ボタン入力による始動回数、インチング回数および連続インチング回数の判定を行うパターンを示す図、図５は始動回数、インチング回数および連続インチング回数のカウントを行うフローチャート、図６は、連続インチング回数のランク付けを行うフローチャート、図７は始動頻度およびインチング頻度の計算を行うフローチャート、図８はインチング頻度のランク付けを行うフローチャートである。 FIG. 4 is a diagram showing a pattern for determining the number of times of starting, the number of times of inching and the number of times of continuous inching by inputting operation buttons of the operation input device. FIG. 5 is a flowchart for counting the number of times of starting, the number of times of inching and number of continuous inchings. And FIG. 7 is a flowchart for calculating the starting frequency and the inching frequency, and FIG. 8 is a flowchart for ranking the inching frequency.
　始動回数およびインチング回数、連続インチング回数をカウントし記憶する記憶装置２４を備えた電気チェーンブロック１００が、始動回数およびインチング回数、連続インチング回数を判定する手段としては、主に以下の６種類の入力が考えられる。 The electric chain block 100 including the storage device 24 that counts and stores the number of times of starting, the number of times of inching, and the number of times of continuous inching is provided. Can be considered.
　第一に操作入力装置５の操作ボタン入力、第二に電磁接触器２１の通電・非通電（開閉）状態を示す入力、第三に電動機１の負荷電流を検出する電流センサ２２からの入力、第四に電磁ブレーキ３の開放状態を示す入力、第五に電動機１の回転数を検出するエンコーダ等の回転数検出装置２３からの入力、第六にフックの位置を検出するフック位置検出装置２５からの入力である。第六におけるフックの位置の検出は、電気チェーンブロック１００のフック８の位置をフック、チェーン、吊り荷および吊り具の状態によって監視することにより行われる。 First, an operation button input of the operation input device 5, second input indicating an energized / de-energized (open / closed) state of the electromagnetic contactor 21, third input from a current sensor 22 for detecting a load current of the electric motor 1, Fourth, an input indicating the open state of the electromagnetic brake 3, fifth, an input from a rotation speed detecting device 23 such as an encoder for detecting the rotation speed of the electric motor 1, and sixth, a hook position detecting device 25 for detecting a hook position. This is the input from. The sixth detection of the position of the hook is performed by monitoring the position of the hook 8 of the electric chain block 100 based on the state of the hook, the chain, the suspended load, and the hanging device.
　上記第一の場合、記憶装置２４は、操作入力装置５の入力操作に応じて、インチング操作の回数、始動回数、連続インチング操作の回数を記憶する。 In the first case, the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the input operation of the operation input device 5.
　上記第二の場合、記憶装置２４は、電磁接触器２１の通電・非通電状態に応じて、インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶する。 In the second case, the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the energized / deenergized state of the electromagnetic contactor 21.
　上記第三の場合、記憶装置２４は、電流センサ２２が検出した負荷電流に応じて、インチング操作の回数、始動回数、連続インチング操作の回数を記憶する。 In the third case, the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the load current detected by the current sensor 22.
　上記第四の場合、記憶装置２４は、電磁ブレーキ３の開放状態に応じて、インチング操作の回数、始動回数、連続インチング操作の回数を記憶する。 (4) In the fourth case, the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the release state of the electromagnetic brake 3.
　上記第五の場合、記憶装置２４は、回転数検出装置２３が検出する回転数に応じて、インチング操作の回数、始動回数、連続インチング操作の回数を記憶する。 In the fifth case, the storage device 24 stores the number of inching operations, the number of start operations, and the number of continuous inching operations according to the rotation speed detected by the rotation speed detection device 23.
　上記第六の場合、記憶装置２４は、フック位置検出装置２５が検出するフック８の位置に応じて、インチング操作の回数、始動回数、連続インチング操作の回数を記憶する。 In the sixth case, the storage device 24 stores the number of inching operations, the number of starting operations, and the number of continuous inching operations according to the position of the hook 8 detected by the hook position detecting device 25.
　本実施例における巻上機では、これら６種類全ての入力を備える必要はなく、いずれか１種または複数の組合せ入力によって、巻上機の始動を判定し、始動、インチング、インチング操作の総回数および連続したインチング操作の回数とインチング頻度を記憶する。 In the hoist according to the present embodiment, it is not necessary to provide all of these six types of inputs, and the start of the hoist is determined by any one or a combination of a plurality of inputs, and the total number of start, inching, and inching operations is performed. The number of successive inching operations and the inching frequency are stored.
　本実施例では、特別な機器を設けることなく、汎用機器を利用して始動、インチング、インチング操作の総回数および連続したインチング操作の回数とインチング頻度を算出することができる。 In the present embodiment, it is possible to calculate the total number of starting, inching, and inching operations, and the number of consecutive inching operations and the inching frequency using a general-purpose device without providing any special device.
　次に、本実施例における操作入力装置の操作ボタン入力による始動回数、インチング回数および連続インチング回数の判定を行うパターンの例について図４を用いて説明する。図４は操作入力装置の操作ボタン入力による始動回数、インチング回数および連続インチング回数のパターン例を示す図である。なお、各判定方法の詳細は後述する図５～８を用いて説明する。 Next, an example of a pattern for determining the number of starts, the number of inchings, and the number of continuous inchings by the operation button input of the operation input device in the present embodiment will be described with reference to FIG. FIG. 4 is a diagram showing an example of a pattern of the number of starts, the number of inchings, and the number of continuous inchings by the operation button input of the operation input device. The details of each determination method will be described with reference to FIGS.
　図４において、上部には例えば1時間の間に時系列に操作される操作入力装置の操作ボタン入力の複数のパターンを示し、下部には各パターンに対応する判定結果を示している。 4 In FIG. 4, the upper part shows a plurality of patterns of operation button inputs of the operation input device operated in a time series during, for example, one hour, and the lower part shows the judgment results corresponding to each pattern.
　図４において、時系列に従い、各パターンの説明および判定結果の説明を行う。まず、操作入力ＯＮ（電動機１への通電）が継続している時間をカウントし、入力ＯＮされ、その後入力ＯＦＦ（電動機への非通電）された時間がＸ秒（所定時間）未満である操作はインチングであると判定するとともに、連続インチング回数も１回とカウントされる。 (4) In FIG. 4, the description of each pattern and the determination result will be given in chronological order. First, the operation input ON (power supply to the electric motor 1) is counted, and the input is turned ON, and then the operation in which the input OFF (electric power is not supplied to the electric motor) is less than X seconds (predetermined time). Is determined to be inching, and the number of consecutive inchings is counted as one.
　次に、入力ＯＮ時間がＸ秒（所定時間）以上継続し、かつ当該操作の前に操作された入力ＯＮがＯＦＦになったタイミングからＹ秒（所定時間）以上経過して当該操作が入力ＯＦＦになった場合、通常始動と判定する。 Next, the input ON time continues for X seconds (predetermined time) or more, and the operation is turned OFF after Y seconds (predetermined time) elapses from the timing when the input ON operated before the operation is turned OFF. Is determined to be a normal start.
　次に、入力ＯＮ時間（第１の通電）がＸ秒未満継続し、かつ当該操作の前に操作された入力ＯＮがＯＦＦ（第１の非通電）になった時から再び操作され入力ＯＮ（第２の通電）し、Ｙ秒未満（所定時間）で当該操作が入力ＯＦＦ（第２の非通電）になった場合、連続インチング回数は２回と判定される。換言すると、電動機１に第１の通電がされ、その後第１の非通電となった時間がＸ秒（所定時間）未満であり、かつ電動機１に第２の通電がされ、その後第２の非通電となり、第１の非通電から第２の非通電までの時間が所定時間未満である時、記憶装置２４は、連続インチング操作として回数を記憶する。本実施例では連続インチング回数が５回発生している例を示している。同様に残りの入力に関しても、順に通常始動、連続インチング回数（５回）と判定する。 Next, the input ON time (first energization) continues for less than X seconds, and the input ON operated before the operation is turned OFF (first non-energization), and is operated again to turn the input ON ( When the second energization is performed and the input is turned OFF (second non-energization) in less than Y seconds (predetermined time), the number of consecutive inchings is determined to be two. In other words, the first energization of the electric motor 1 and the time of the first non-energization after that are less than X seconds (predetermined time), and the second energization of the electric motor 1 and then the second non-energization When the power is turned on and the time from the first non-energization to the second non-energization is less than the predetermined time, the storage device 24 stores the number of times as a continuous inching operation. This embodiment shows an example in which the number of consecutive inchings is five. Similarly, for the remaining inputs, the normal start and the continuous inching count (5 times) are sequentially determined.
　以上の判定を纏めると、1時間の間に入力ＯＮが操作された始動回数は１１回、インチング回数は９回、連続インチング回数の１位は５回、２位は３回、３位は1回、始動頻度は１１回、インチング頻度は９回であることが判定される。 Summarizing the above judgments, the number of times the input ON was operated during one hour was 11 times, the number of inchings was 9 times, the number of consecutive inchings was 5 times, the 2nd was 3 times, and the 3rd was 1 time. Times, the starting frequency is determined to be 11 times, and the inching frequency is determined to be 9 times.
　次に、図５および図６を用いて、始動回数、インチング操作回数、連続したインチング操作回数を判定する方法の一例を説明する。図５は始動回数、インチング回数および連続インチング回数のカウントを行うフローチャート、図６は連続インチング回数のランク付けを行うフローチャートである。 Next, an example of a method of determining the number of starts, the number of inching operations, and the number of consecutive inching operations will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart for counting the number of starts, the number of inchings, and the number of continuous inchings. FIG. 6 is a flowchart for ranking the number of continuous inchings.
　図４の始動回数・インチング回数カウント処理では、初期値が始動回数、インチング回数、連続インチング回数がいずれも０回であるとする。 In the start count / inch count count process shown in FIG. 4, it is assumed that the initial count is 0, the start count, the inching count, and the continuous inching count are all zero.
　図５および図６に示す処理は、記憶装置２４にて行われる。まず、記憶装置２４の中央演算処理部２４ａは、操作入力の状態を確認(ステップ１０１)し、操作入力がＯＮの場合(ステップ１０１のYes)、入力がＯＮしている間の時間をカウント(ステップ１０２)する。ステップ１０１において、操作入力がＯＦＦの場合(ステップ１０１のNo)、ステップ１０１の判定を繰り返す。ステップ１０３において、操作入力がＯＦＦになった場合(ステップ１０３のYes)、連続インチング中であるかを確認(ステップ１０４)する。初期値では連続インチング回数は０であるため、ステップ１０４のYesに進む。次に、入力ＯＮ時間がＸ秒未満であった場合(ステップ１０５のYes)は、連続インチング回数を１に設定(ステップ１０６)し、インチング回数を＋１として記憶部２４ｂに記憶する(ステップ１０７)。連続インチングを判定する為、インチング間隔のカウントを開始(ステップ１０８)し、最後に始動回数を＋１として記憶部２４ｂに記憶する(ステップ１０９)。 処理 The processing shown in FIGS. 5 and 6 is performed in the storage device 24. First, the central processing unit 24a of the storage device 24 checks the state of the operation input (step 101), and when the operation input is ON (Yes in step 101), counts the time while the input is ON (step 101). Step 102) is performed. In step 101, when the operation input is OFF (No in step 101), the determination in step 101 is repeated. In step 103, when the operation input is turned off (Yes in step 103), it is confirmed whether continuous inching is being performed (step 104). Since the number of consecutive inchings is 0 in the initial value, the process proceeds to Yes in step 104. Next, when the input ON time is shorter than X seconds (Yes in Step 105), the number of consecutive inchings is set to 1 (Step 106), and the number of inchings is set to +1 and stored in the storage unit 24b (Step 107). . In order to determine continuous inching, the counting of the inching interval is started (step 108), and finally the number of starts is set to +1 and stored in the storage unit 24b (step 109).
　一方、入力ＯＮ時間がＸ秒以上であった場合(ステップ１０５のNo)は、始動回数＋１(ステップ１０９)に移行する。 On the other hand, if the input ON time is equal to or longer than X seconds (No in step 105), the process proceeds to the number of start times + 1 (step 109).
　ステップ１０６で連続インチング回数が＋１となった後に、ステップ１０１に戻り、次の操作入力ＯＮ時（ステップ１０１のYes）であってステップ１０４に到達時した場合には、Ｎｏに進み、連続インチング判定処理（ステップ１１０）に進む。ステップ１０８でカウント開始したインチング間隔がＹ秒未満であった場合(ステップ１１０のYes)、次の操作もインチングであると判定し、連続インチング回数を＋１として記憶部２４ｂに記憶する(ステップ１１１)。インチング間隔がＹ秒以上だった場合(ステップ１１０のNo)、図６の連続インチング回数ランク付け処理へ移行する(ステップ１１２)。このようにして、始動・インチング回数カウント処理が実行され、インチング回数が記憶部２４ｂに記憶される。 After the number of consecutive inchings becomes +1 in step 106, the process returns to step 101, and when the next operation input is ON (Yes in step 101) and the process reaches step 104, the process proceeds to No and determines continuous inching. Proceed to processing (step 110). If the inching interval started counting in step 108 is less than Y seconds (Yes in step 110), it is determined that the next operation is also inching, and the number of successive inchings is stored as +1 in the storage unit 24b (step 111). . If the inching interval is equal to or longer than Y seconds (No in Step 110), the process proceeds to the continuous inching count ranking process in FIG. 6 (Step 112). In this way, the start / inching count processing is executed, and the inching count is stored in the storage unit 24b.
　次に図６を用いて連続インチング回数ランク付け処理について説明する。図６における連続インチング回数ランク付け処理では、過去最大の回数を１位～３位まで記録する場合として一例を示す。 Next, the continuous inching count ranking process will be described with reference to FIG. In the continuous inching count ranking process in FIG. 6, an example is shown as a case where the largest number in the past is recorded in the first to third places.
　まず、その時点の連続インチング回数を回数Ｎとして記憶部２４ｂに保存し(ステップ２０１)、中央演算処理部２４ａは回数３位と比較する(ステップ２０２)。回数３位未満で無い場合は(ステップ２０２のNo)、回数Ｎの値を回数３位として記憶部２４ｂに記憶する(ステップ２０３)。次に中央演算処理部２４ａは回数Ｎと回数２位を比較(ステップ２０４)し、回数２位未満で無い場合は（ステップ２０４のNo）、回数２位を回数３位に(ステップ２０５)、回数Ｎを回数２位として記憶部２４ｂに記憶する(ステップ２０６)。次に中央演算処理部２４ａは回数Ｎと回数１位を比較(ステップ２０７)し、回数１位未満で無い場合は(ステップ２０７のNo)、回数１位を回数２位に(ステップ２０８)、回数Ｎを回数１位として記憶部２４ｂに記憶する(ステップ２０９)。最後に連続インチング回数を０(クリア)し(ステップ２１０)、回数Ｎも０(クリア)にして始動回数・インチング回数カウント処理へ戻る。なお、ステップ２０２、ステップ２０４、ステップ２０７で判定がＹｅｓだった場合、ステップ２１０およびステップ２１１に移行する。 First, the number of consecutive inchings at that time is stored in the storage unit 24b as the number N (step 201), and the central processing unit 24a compares the number with the third number (step 202). If the number is not less than the third place (No in step 202), the value of the number N is stored in the storage unit 24b as the third place (step 203). Next, the central processing unit 24a compares the number N with the second place (step 204), and if not less than the second place (No in step 204), the second place becomes the third place (step 205). The number N is stored as the second number in the storage unit 24b (step 206). Next, the central processing unit 24a compares the number N with the number one place (step 207). If the number is not less than the number one place (No in step 207), the number one place becomes the number two place (step 208). The number N is stored in the storage unit 24b as the number-one place (step 209). Finally, the number of continuous inchings is set to 0 (cleared) (step 210), the number N is set to 0 (cleared), and the process returns to the number-of-starts / inchings counting process. If the determinations in steps 202, 204, and 207 are Yes, the process proceeds to steps 210 and 211.
　次に、図７および図８を用いて始動頻度、インチング頻度の計算およびインチング頻度のランク付けする方法の一例を説明する。始動頻度、インチング頻度計算処理は、中央演算処理部２４ａが１分間カウントを行い(ステップ３０１)、１分経過した場合(ステップ３０２のYes)、記憶部２４ｂに変数Ｍとして５９をセットし(ステップ３０３)、回数更新ループを開始する(ステップ３０４)。ステップ３０５およびステップ３０６のループで配列を用い、０～５９の変数に０～５９分前の始動頻度およびインチング頻度を記憶部２４ｂの配列Ａと配列Ｂにそれぞれ記録する。変数Ｍが０になった場合に、ステップ３０４のループから抜け、最新の始動回数とインチング頻度を、それぞれ記憶部２４ｂの配列Ａ[０]とＢ[０]に記憶する。中央演算処理部２４ａは０分前と始動回数Ａ[０]およびインチング回数Ｂ[０]と５９分前の始動回数Ａ[５９]およびインチング回数Ｂ[５９]の差を計算し、１時間の間での始動頻度およびインチング頻度を記憶部２４ｂに記憶し(ステップ３０８)、図８のインチング頻度ランク付け処理に移行する。 Next, an example of a method of calculating the starting frequency and the inching frequency and ranking the inching frequency will be described with reference to FIGS. 7 and 8. In the starting frequency and inching frequency calculation processing, the central processing unit 24a counts for one minute (step 301), and when one minute has elapsed (Yes in step 302), sets 59 as a variable M in the storage unit 24b (step 301). 303), a loop for updating the number of times is started (step 304). The array is used in the loop of steps 305 and 306, and the starting frequency and the inching frequency of 0 to 59 minutes before are recorded in the arrays A and B of the storage unit 24b in the variables of 0 to 59, respectively. When the variable M becomes 0, the process exits from the loop of step 304, and stores the latest start count and inching frequency in the arrays A [0] and B [0] of the storage unit 24b, respectively. The central processing unit 24a calculates the difference between the number of starts A [0] and the number of inchings B [0] before 0 minutes and the number of starts A [59] and the number of inchings B [59] 59 minutes before, and calculates one hour. The start frequency and the inching frequency between the two are stored in the storage unit 24b (step 308), and the process proceeds to the inching frequency ranking process of FIG.
　図８におけるインチング頻度ランク付け処理では、図６と同様に過去最大の頻度を１位～３位まで記録する場合として一例を示す。インチング頻度ランク付け処理は１時間毎に行う(ステップ４０１およびステップ４０２)。まず、１時間経過時点のインチング頻度（ステップ４０２のYes）を頻度Ｎとして記憶部２４ｂに記憶し(ステップ４０３)、中央演算処理部２４ａは回数３位と比較する(ステップ４０４)。回数３位未満で無い場合は（ステップ４０４のNo）、回数Ｎの値を回数３位として記憶部２４ｂに記録する(ステップ４０５)。次に中央演算処理部２４ａは回数Ｎと回数２位を比較(ステップ４０６)し、回数２位未満で無い場合は（ステップ４０４のYes）、回数２位を回数３位に(ステップ４０７)、回数Ｎを回数２位として記憶部２４ｂに記録する(ステップ４０８)。次に中央演算処理部２４ａは回数Ｎと回数１位を比較(ステップ４０９)し、回数１位未満で無い場合は(ステップ４１０のNo)、回数１位を回数２位に(ステップ４１０)、回数Ｎを回数１位として記憶部２４ｂに記録する(ステップ４１１)。最後に連続インチング回数を０(クリア)して(ステップ４１２)、始動回数・インチング頻度カウント処理へ戻る。 In the inching frequency ranking process in FIG. 8, an example is shown in which the highest frequency in the past is recorded in the first to third places, as in FIG. The inching frequency ranking process is performed every hour (step 401 and step 402). First, the inching frequency at the elapse of one hour (Yes in step 402) is stored in the storage unit 24b as the frequency N (step 403), and the central processing unit 24a compares the number with the third number of times (step 404). If the number is not less than the third place (No in step 404), the value of the number N is recorded in the storage unit 24b as the third place (step 405). Next, the central processing unit 24a compares the number N with the second place (step 406). If the number N is not less than the second place (Yes in step 404), the second place becomes the third place (step 407). The number N is recorded as the second number in the storage unit 24b (step 408). Next, the central processing unit 24a compares the number N with the first place (step 409). If the number is not less than the first place (No in step 410), the first place is changed to the second place (step 410). The number N is recorded in the storage unit 24b as the number one place (step 411). Finally, the continuous inching count is cleared (cleared) to 0 (step 412), and the process returns to the starting count / inching frequency counting process.
　以上説明したように、本実施例では始動回数、インチング回数、連続インチング回数、始動頻度、インチング頻度をカウントするようにしている。本実施例では、これらのカウント結果を参照し、巻上機の動作制限を行うことができる。 As described above, in this embodiment, the number of starts, the number of inchings, the number of continuous inchings, the starting frequency, and the inching frequency are counted. In this embodiment, the operation of the hoist can be limited by referring to these count results.
　例えば、記憶装置２４に記憶されたインチング操作の回数が所定値を超えた場合には、操作入力装置５からのインチング操作に対し動作制限を行う。また、記憶装置２４に記憶された連続インチング操作の回数が所定値を超えた場合には、操作入力装置５からのインチング操作に対し動作制限を行う。具体的には、例えば連続インチング回数の所定順位（本実施例では上位３位）の平均が規定値を超えた場合や、インチング頻度の所定順位（本実施例では上位３位）の平均が規定値を超えた場合には、Ｘ秒（所定時間）未満の操作入力を受け付けず、インチング操作が出来ないよう、動作制限を設ける等の方法がある。 For example, when the number of inching operations stored in the storage device 24 exceeds a predetermined value, the operation is restricted for the inching operation from the operation input device 5. When the number of consecutive inching operations stored in the storage device 24 exceeds a predetermined value, the operation is restricted for the inching operation from the operation input device 5. Specifically, for example, when the average of the predetermined order of the number of consecutive inchings (top three in this embodiment) exceeds a specified value, or the average of the predetermined order of inching frequency (top three in this embodiment) is specified. When the value exceeds the value, there is a method of not accepting an operation input for less than X seconds (predetermined time) and restricting the operation so that the inching operation cannot be performed.
　本実施例では、インチング操作に対する動作制限を設けることにより、巻上機が故障し、動作不能になることを抑制することができる。 In the present embodiment, by providing an operation restriction on the inching operation, it is possible to prevent the hoist from breaking down and becoming inoperable.
　さらに、記憶装置２４に記憶されたインチング操作の回数に基づいて、巻上機の寿命を推測するようにしても良い。巻上機の寿命を推測する寿命推測方法としては、部品交換の寿命を推測する方法、製品全体の寿命を推測する方法がある。 Furthermore, the life of the hoist may be estimated based on the number of inching operations stored in the storage device 24. As a service life estimation method for estimating the service life of the hoist, there are a method of estimating the service life of component replacement and a method of estimating the service life of the entire product.
　部品交換寿命および製品寿命の推測方法については、例えば始動頻度とインチング頻度の所定順位（本実施例では上位３位）の平均値の差をインチング頻度で割った数値を、部品交換寿命および製品寿命の初期値に掛けた数値を補正して寿命とする方法がある。 For the method of estimating the component replacement life and the product life, for example, a value obtained by dividing the difference between the average value of the predetermined order of the start frequency and the inching frequency (the top three in this embodiment) by the inching frequency is used as the component replacement life and the product life. There is a method of correcting the numerical value multiplied by the initial value of the above to obtain the life.
　これらの情報は、記憶装置２４から、ＵＳＢ等の記憶媒体３１、Ｗｉｆｉ（登録商標）等の無線機器３２、および７セグメントＬＥＤや液晶画面等の表示器３３に出力することで、顧客やメンテナンス作業員等の外部に情報出力が可能である。 These pieces of information are output from the storage device 24 to a storage medium 31 such as a USB, a wireless device 32 such as Wifi (registered trademark), and a display 33 such as a 7-segment LED or a liquid crystal display, so that the customer and maintenance work can be performed. It is possible to output information to the outside such as a member.
　本実施例では、インチング操作を考慮した寿命推定を行うようにしているので、巻上機が故障し、動作不能になることを抑制することができる。 In the present embodiment, since the life is estimated in consideration of the inching operation, it is possible to prevent the hoist from breaking down and becoming inoperable.
　また、記憶装置２４の情報を容易に取り出すことができるので、保守作業を向上させることができる。 (4) Since the information in the storage device 24 can be easily taken out, the maintenance work can be improved.
　本実施例における動作制限及び寿命推測は、記憶装置２４を例えばクラウドに設け、クラウド上でも行うようにしても良い。本実施例はクラウドシステムにおいても容易に適用することができる。 The operation limitation and the life estimation in the present embodiment may be performed on a cloud by providing the storage device 24 in, for example, a cloud. This embodiment can be easily applied to a cloud system.
　以上説明したように本実施例によれば、インチング操作の回数を考慮した部品交換時期・製品寿命の推測を行うことのできる巻上機を提供することができる。 According to the present embodiment, as described above, it is possible to provide a hoist capable of estimating a component replacement time and a product life in consideration of the number of inching operations.
　１…電動機、２…減速部、３…電磁ブレーキ、４…上吊具、５…操作入力装置、６…チェーンバケット、７…スプロケット、８…フック、９…チェーン、１０…制御部、２１…電磁接触器、２２…電流センサ、２３…回転数検出装置、２４…記憶装置、２４ａ…中央演算処理部、２４ｂ…記憶部、２５…フック位置検出装置、３１…記憶媒体、３２…無線機器、３３…表示器、１００…電気チェーンブロック DESCRIPTION OF SYMBOLS 1 ... Electric motor, 2 ... Deceleration part, 3 ... Electromagnetic brake, 4 ... Upper hanging tool, 5 ... Operation input device, 6 ... Chain bucket, 7 ... Sprocket, 8 ... Hook, 9 ... Chain, 10 ... Control part, 21 ... Electromagnetic Contactor, 22 current sensor, 23 rotational speed detecting device, 24 storage device, 24a central processing unit, 24b storage unit, 25 hook position detecting device, 31 storage medium, 32 wireless device, 33 ... Display, 100 ... Electric chain block

Claims (17)

  1. 　吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機において、
    　前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶することを特徴とする巻上機。     A hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and operation information of the motor corresponding to the operation input device are stored. In a hoist having a storage device,
    The hoisting machine according to claim 1, wherein the storage device stores the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time.
  2. 　請求項１において、
    　前記記憶装置は、前記電動機に通電された始動回数を記憶することを特徴とする巻上機。     In claim 1,
    The hoisting machine according to claim 1, wherein the storage device stores the number of times the electric motor has been energized.
  3. 　請求項２において、
    　前記電動機に第１の通電がされ、その後、第１の非通電となった時間が所定時間未満であり、かつ前記電動機に第２の通電がされ、その後、第２の非通電となり、前記第１の非通電から前記第２の非通電までの時間が所定時間未満である時、
    前記記憶装置は、連続インチング操作として回数を記憶することを特徴とする巻上機。     In claim 2,
    The first energization of the motor is performed, and then the first non-energization time is less than a predetermined time, and the motor is energized for the second time, and then the second non-energization is performed. When the time from the first non-energization to the second non-energization is less than a predetermined time,
    The storage device stores the number of times as a continuous inching operation.
  4. 　請求項３において、
    　前記記憶装置は、前記操作入力装置の入力操作に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    The hoist according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of the starting, and the number of times of the continuous inching operation in accordance with an input operation of the operation input device.
  5. 　請求項３において、
    　前記電動機への通電・非通電を行う電磁接触器を備え、
    　前記記憶装置は、前記電磁接触器の通電・非通電状態に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    An electromagnetic contactor for energizing / de-energizing the motor is provided,
    The hoisting machine according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of the starting, and the number of times of the continuous inching operation in accordance with an energized / deenergized state of the electromagnetic contactor.
  6. 　請求項３において、
    　前記電動機の負荷電流を検出するする電流センサを備え、
    　前記記憶装置は、前記電流センサが検出した負荷電流に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    A current sensor for detecting a load current of the electric motor,
    The hoist according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of the start, and the number of times of the continuous inching operation according to the load current detected by the current sensor.
  7. 　請求項３において、
    　前記電動機の回転を停止させる電磁ブレーキを備え、
    　前記記憶装置は、前記電磁ブレーキの開放状態に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    An electromagnetic brake for stopping rotation of the electric motor,
    The hoist according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of the starting, and the number of times of the continuous inching operation in accordance with an open state of the electromagnetic brake.
  8. 　請求項３において、
    　前記電動機の回転数を検出する回転数検出装置を備え、
    　前記記憶装置は、前記回転数検出装置が検出する回転数に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    A rotation speed detection device that detects the rotation speed of the electric motor,
    The hoisting machine according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of starting, and the number of times of the continuous inching operation according to the number of revolutions detected by the revolution number detecting device.
  9. 　請求項３において、
    　前記フックの位置を検出するフック位置検出装置を備え、
    　前記記憶装置は、前記フック位置検出装置が検出する前記フックの位置に応じて、前記インチング操作の回数、前記始動回数、前記連続インチング操作の回数を記憶することを特徴とする巻上機。     In claim 3,
    A hook position detecting device for detecting a position of the hook,
    The hoisting machine according to claim 1, wherein the storage device stores the number of times of the inching operation, the number of times of starting, and the number of times of the continuous inching operation according to the position of the hook detected by the hook position detecting device.
  10. 　請求項３において、
    　前記記憶装置には、記憶媒体を接続可能としたことを特徴とする巻上機。     In claim 3,
    A hoisting machine, wherein a storage medium can be connected to the storage device.
  11. 　請求項３において、
    　前記記憶装置には、無線機器が備えられ、前記無線機器を介して前記記憶装置に記憶されたデータを出力可能としたことを特徴とする巻上機。     In claim 3,
    The hoist according to claim 1, wherein the storage device includes a wireless device, and the data stored in the storage device can be output through the wireless device.
  12. 　請求項３において、
    　前記記憶装置には、表示器が備えられ、前記表示器に前記記憶装置に記憶されたデータを表示出力可能としたことを特徴とする巻上機。     In claim 3,
    The hoisting machine according to claim 1, wherein the storage device includes a display, and the display device can display and output data stored in the storage device.
  13. 　吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機の動作制限方法であって、
    　前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶し、前記インチング操作の回数が所定値を超えた場合には、前記操作入力装置からの前記インチング操作に対し動作制限を行うことを特徴とする巻上機の動作制限方法。     A hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and operation information of the motor corresponding to the operation input device are stored. A method for restricting the operation of a hoist comprising a storage device,
    The storage device stores the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time, and when the number of inching operations exceeds a predetermined value, the operation input is performed. An operation restriction method for a hoist, wherein operation restriction is performed on the inching operation from a device.
  14. 　請求項１３において、
    　前記電動機に第１の通電がされ、その後、第１の非通電となった時間が所定時間未満であり、かつ前記電動機に第２の通電がされ、その後、第２の非通電となり、前記第１の非通電から前記第２の非通電までの時間が所定時間未満である時、前記記憶装置は、連続インチング操作として回数を記憶し、前記連続インチング操作の回数が所定値を超えた場合には、前記操作入力装置からの前記インチング操作に対し動作制限を行うことを特徴とする巻上機の動作制限方法。     In claim 13,
    The first energization of the motor is performed, and then the first non-energization time is less than a predetermined time, and the motor is energized for the second time, and then the second non-energization is performed. When the time from the first non-energization to the second non-energization is less than a predetermined time, the storage device stores the number of continuous inching operations, and when the number of the continuous inching operations exceeds a predetermined value, Is a method for restricting the operation of the hoist, wherein the operation is restricted for the inching operation from the operation input device.
  15. 　吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置と、前記操作入力装置に応じた前記電動機の運転情報を記憶する記憶装置とを備えた巻上機の寿命推測方法であって、
    　前記記憶装置は、前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数を記憶し、前記インチング操作の回数に基づいて巻上機の寿命を推測することを特徴とする巻上機の寿命推測方法。     A hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, an operation input device for energizing / de-energizing the motor, and operation information of the motor corresponding to the operation input device are stored. A method for estimating the life of a hoist provided with a storage device,
    The storage device stores the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time, and estimates the life of the hoist based on the number of inching operations. Characteristic method of estimating the life of the hoist.
  16. 　吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置とを備えた巻上機の動作制限システムであって、
    　前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数が所定値を超えた場合には、前記操作入力装置からの前記インチング操作に対し動作制限を行うことを特徴とする巻上機の動作制限システム。     A hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation limiting system for a hoist including an operation input device for energizing / de-energizing the motor,
    When the number of times of the inching operation in which the electric motor is energized, and then the time of de-energization is less than the predetermined time exceeds a predetermined value, operation restriction is performed on the inching operation from the operation input device. A feature is the operation restriction system of the hoist.
  17. 吊荷を吊るすフックと、前記フックを接続部材を介して昇降させる電動機と、前記電動機への通電・非通電を行う操作入力装置とを備えた巻上機の寿命推測システムであって、
    　前記電動機に通電され、その後非通電となった時間が所定時間未満であるインチング操作の回数に基づいて巻上機の寿命を推測することを特徴とする巻上機の寿命推測システム。     A life estimating system for a hoist comprising a hook for suspending a suspended load, a motor for raising and lowering the hook via a connecting member, and an operation input device for energizing / de-energizing the motor,
    A life estimating system for a hoist, wherein the life of the hoist is estimated based on the number of inching operations in which the electric motor is energized and then de-energized for less than a predetermined time.
PCT/JP2019/034203 2018-09-13 2019-08-30 Hoist, hoist operation restriction method and hoist life estimation method, and hoist operation restriction system and hoist life estimation system WO2020054463A1 (en)

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