CN113382950B - Data recording device and hoist having the same - Google Patents
Data recording device and hoist having the same Download PDFInfo
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- CN113382950B CN113382950B CN202080012291.XA CN202080012291A CN113382950B CN 113382950 B CN113382950 B CN 113382950B CN 202080012291 A CN202080012291 A CN 202080012291A CN 113382950 B CN113382950 B CN 113382950B
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- data recording
- operation input
- hoisting machine
- motor
- input device
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The present invention includes a data recording device (30) of a hoist for estimating a component replacement timing of an electric chain block (100) from operation input information of an operation input device (5) for operating the electric chain block (100) (hoist) and a load current of a motor (1) driving the electric chain block (100). The data recording device (30) further includes: a power supply connector (power supply female connector (17)) connected to a control unit (10) for controlling the electric chain block (100) and for supplying power to the motor (1); and an operation connector (operation female connector (18)) connected to the control unit (10) and used for supplying control power based on operation input information of the operation input device (5).
Description
Technical Field
The invention relates to a data recording device and a winch with the same.
Background
As an apparatus for estimating the life of a hoist, for example, there is a technique described in patent document 1. In the technique described in patent document 1, the number of times of operation of the hoisting machine is counted at a plurality of levels according to the load level, and the number of times of counting is counted in total in consideration of the life determined by the load level, thereby estimating the life of the hoisting machine.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2-89798
Disclosure of Invention
Problems to be solved by the invention
In patent document 1, a count processing unit that counts the number of operations is configured with an operation unit having a switch on a bus of an electric power line, and detects a load level with a current detector connected to the electric power line on the upstream side of the operation unit. In the technique described in patent document 1, the device for estimating the life of the hoisting machine is previously installed in the hoisting machine, and no consideration is given to the point that the installed hoisting machine is installed with the life estimation device later.
Therefore, the service life of the hoist not having the service life estimating device is estimated visually by the maintenance worker, and the judgment thereof is subject to an error due to the experience of the maintenance worker.
The invention provides a data recording device capable of providing a device for predicting the replacement time of the parts of a winch and the time of reaching the service life on the set winch, and a winch with the data recording device.
Means for solving the problems
In order to achieve the above object, the present invention includes a data recording device for estimating a component replacement timing of a hoisting machine from operation input information of an operation input device for operating the hoisting machine and a load current of a motor driving the hoisting machine, the data recording device including: a power supply connector connected to a control unit that controls the hoisting machine, the power supply connector being configured to supply power to the motor; and an operation connector connected to a control unit for controlling the hoisting machine, the operation connector being used for supplying control power based on operation input information of the operation input device.
The present invention is characterized by a hoisting machine including an operation input device for operating the hoisting machine, a motor for lifting a hook portion on which a load is suspended, a control unit for controlling the motor in accordance with the operation input device, and a data recording device for estimating a component replacement timing of the hoisting machine from operation input information of the operation input device and a load current of the motor, wherein the data recording device is disposed between the control unit and the operation input device which are electrically connected.
Effects of the invention
According to the present invention, it is possible to provide a data recording device capable of providing a device for predicting the timing of replacing a component of a hoisting machine and the time to reach the life of the component, to the installed hoisting machine, and a hoisting machine having the data recording device.
Drawings
Fig. 1 is a side view showing a structure of an electric chain block main body.
Fig. 2 is a front view showing a structure of an electric chain block main body.
Fig. 3 is a connection diagram showing a control structure of the electric chain block main body.
Fig. 4 is a side view of the electric chain block of the embodiment of the present invention.
FIG. 5 is an elevation view of a chain block of an embodiment of the present invention.
Fig. 6 is a connection diagram showing a control structure of the electric chain block according to the embodiment of the present invention.
Fig. 7 is a flowchart of counting the number of times of starting and the operating time according to the embodiment of the present invention.
Fig. 8 is an example of a flowchart for determining the load level.
Fig. 9 is an example of a flowchart of the process of releasing the overload prevention function.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to fig. 1 to 9. In the present embodiment, an example in which the hoist is applied to an electric chain block will be described. The present invention is not limited to the following embodiments, and various modifications and application examples of the technical concept of the present invention are included in the scope thereof.
Fig. 1 is a side view showing a structure of an electric chain block main body, fig. 2 is a front view showing the structure of the electric chain block main body, and fig. 3 is a connection view showing a control structure of the electric chain block.
The overall structure and the operation principle of the electric chain block will be described with reference to fig. 1 to 3. First, the overall structure is explained.
The electric chain block 100 includes a motor 1, a speed reduction unit 2, an electromagnetic brake 3, an upper hoist 4, an operation input device 5, a bucket 6, a sprocket 7, a hook unit 8, a chain 9, and a control unit 10. The electric chain block 100 is provided with an upper hoist 4 for suspending the electric chain block 100 from a beam or the like of a building. Further, the electric chain block 100 is equipped with a motor 1 for raising a hook portion 8 for suspending a load. A speed reduction unit 2 for reducing the rotation generated in the motor 1 is connected to the motor 1. The rotational force of the motor 1 decelerated by the deceleration section 2 is transmitted to the sprocket 7. An electromagnetic brake 3 for stopping rotation generated in the motor 1 is attached to the motor 1. The chain 9 engages with the sprocket 7. Further, the electric chain block 100 is provided with a control unit 10 that controls the operations of the electric motor 1 and the electromagnetic brake 3.
Next, the operation principle of the electric chain block 100 will be described with reference to fig. 1 to 3. As shown in fig. 3, a control unit 10 of the hoisting machine is provided with a power male connector 12 connected to a power female connector 11, and power is supplied to the control unit 10. A power cable 15 is connected to the power female connector 11. Further, the control unit 10 of the hoisting machine is provided with an operation male connector 14 connected to an operation female connector 13 of the operation input device 5, and operation information of the operation input device 5 is input to the control unit 10. An operation cable 16 is connected to the operation female connector 13. The power female connector 11 and the power male connector 12, and the operation female connector 13 and the operation male connector 14 are detachable, respectively.
In the circuit configuration described above, for example, when the upper operation button of the operation input device 5 is pressed, the electromagnetic contactor (coil) 23 is energized through the contact point of the anti-overwinding device 22 located in the control unit 10, whereby the electromagnetic contactor (contact point) 24 is closed, and the motor 1 is energized through the contact point of the anti-overwinding device 25. Simultaneously with the energization of the motor 1, the electromagnetic brake 3 is also energized, the electromagnetic brake 3 is released, and the motor 1 starts rotating. The rotational power of the motor 1 is decelerated to a predetermined rotational speed by the deceleration section 2, and the rotation is transmitted to the chain 9 by the sprocket 7 connected to the final deceleration stage, so that the hook section 8 is lifted up or lowered down via the chain 9, and the hoist is lifted up or lowered down. The electric chain block 100 is provided with a bucket 6 for storing a chain 9. When the hook 8 is lifted, the chain 9 located on the opposite side of the hook 8 is stored in the bucket 6, and when the hook 8 is lifted, the chain 9 located on the opposite side of the hook 8 is discharged from the bucket 6.
The hoisting machine needs to be replaced with a product, a component, or the like according to the use state, but the product life and the replacement timing of the component are different depending on the number of times of starting and the operation time for each load level. The determination of the lifetime of the product and the replacement timing of the component is performed visually by the maintenance worker, but an error occurs in the determination due to the experience of the maintenance worker. There is a winch to which a device for estimating a component replacement timing and a product life by measuring an operation time or the like is attached, but such a winch is a winch to which a function for estimating a component replacement timing and a product life is attached in advance, and this is not considered in the case of being attached to an existing winch.
Means for solving this problem will be described with reference to fig. 4 to 9. Fig. 4 is a side view of an electric chain block according to an embodiment of the present invention, fig. 5 is a front view of the chain block according to the embodiment of the present invention, fig. 6 is a connection diagram showing a control structure of the electric chain block according to the embodiment of the present invention, fig. 7 is an example of a flowchart for counting the number of times of starting and the operation time according to the embodiment of the present invention, fig. 8 is an example of a flowchart for determining the load level, and fig. 9 is an example of a flowchart for releasing the overload prevention function.
In the electric chain block 100 according to the embodiment of the present invention, a data recording device 30 for estimating a component replacement timing of the electric chain block 100 (hoist) and the like based on operation input information of the operation input device 5 and a load current of the motor 1 is provided between the control unit 10 of the electric chain block 100 and the operation input device 5 which are electrically connected. In other words, the control unit 10 of the electric chain block 100 is electrically connected to the operation input device 5 via the data recording device 30. The data recording device 30 further includes a power supply cable 15 for supplying power to the motor 1, and a current sensor 32 for detecting a load current of the motor 1 from the power supply cable 15. More specifically, the data recording device 30 determines the operation input from the operation input device 5, measures and records the load current of the motor 1, estimates the timing of component replacement and the product life, and limits the operation of the overload hoist. The configuration of the data recording device 30 will be described with reference to fig. 6.
To the data recording device 30, a power supply line 15 and an operation input device 5 are connected. The data recording device 30 includes a power female connector 17 connected to the power male connector 12 of the control unit 10. The power male connector 12 is electrically connected to the power female connector 17. The power source cable 15 is connected to the power source female connector 17, and power is supplied to the control unit 110 of the hoisting machine via the power source female connector 17 and the power source male connector 12. Similarly, the data recording device 30 includes an operation female connector 18 connected to the operation male connector 14 of the control unit 10. The operating male connector 14 is electrically connected with the operating female connector 18. The operation cable 16 is connected to the operation female connector 18, and the control power is supplied to the control unit 110 of the hoisting machine via the operation female connector 18 and the operation male connector 14. The power female connector 17 and the power male connector 12, and the operation female connector 18 and the operation male connector 14 are detachable, respectively.
The data recording device 30 includes a signal element 33 for detecting an input of an operation button of the operation input device 5, an AD converter 36 for AD-converting an input from a current sensor 32 for measuring a load current of the motor 1, a common line breaking relay 34 for breaking a common line of the operation input device 5, a lift operation line breaking relay 35 for breaking a lift operation input line, a CPU37 (Central Processing Unit) for controlling these relays, and a control circuit board 31 having a memory 38 for recording stored information. The current sensor 32 is disposed in 1 phase (for example, R phase) of the power supply line.
The power supply unit 39 of the control circuit board 31 receives power supply from the step-down transformer 21 for supplying power to the operation input device 5. For example, when there is a lift operation input from the operation input device 5, the operation of the data recording device 30 is performed by energizing the signal element 33 in the control circuit board 31 and introducing operation input information to the CPU37. At the same time, the control power passes through the lift wire cut-off relay 35, and the electromagnetic contactor (coil) 23 is energized through the anti-overwinding device 22 of the control unit 10 of the electric chain block 100, whereby the electromagnetic contactor (contact) 24 is closed, and the motor 1 is energized through the contact of the anti-overwinding device 25. Simultaneously with the energization of the motor 1, the electromagnetic brake 3 is also energized to release the electromagnetic brake 3, and the motor 1 starts rotating. When the motor 1 is energized, the current sensor 32 outputs a current value corresponding to the load current to the control circuit board 31. The output current value is converted into a digital signal by the AD converter 36, and the digital signal is introduced into the CPU37, and the number of times of activation/operation time per load level is counted.
Since the data recording device 30 of the present embodiment has the connectors (the power source female connector 17 and the operation female connector 18) for connecting to the control unit 10 of the hoisting machine, the data recording device 30 can be mounted on the hoisting machine by detaching the power source connector (the power source female connector 11) on the power source side and the operation connector (the operation female connector 13) on the operation input device 5 side from the power source connector (the power source male connector 12) and the operation connector (the operation male connector 14) provided on the control unit 10 of the hoisting machine, and connecting the power source connector (the power source female connector 17) and the operation connector (the operation male connector 14) on the data recording device 30 side provided on the data recording device 30 to the released power source connector (the power source male connector 12) and the operation connector (the operation male connector 14).
Next, the number of times of activation/operating time counting process will be described with reference to fig. 7. As for the initial value in the number-of-starts/operating time counting process of fig. 7, the total number of starts, the total operating time, and the conversion flag are all 0. The processing of fig. 7 is executed by the CPU37 provided in the data recording device 30, and the data is stored in the memory 38.
First, the state of the operation input is confirmed (step S101), and when the operation input is ON (yes in step S101), the time during which the input is ON is counted (step S102). When the operation input ON time is not less than X seconds (predetermined time) (yes in step S103), the conversion flag is set to 1, and AD conversion is started (step S104).
Thereafter, the AD converted output value is stored (step S105), the process proceeds to the load level determination process of fig. 8, and the process proceeds to step S106. If the input ON time is less than X seconds (no in step S103), the process proceeds directly to step S106. If the operation input is not OFF (no in step S106), the process is repeated from step S103 onward. When the operation input is OFF (yes in step S106), the input ON time is saved (step S107), 1 is added to the total number of starts (step S108), and the input ON time is added to the total operation time (step S109).
If the conversion flag is 1 (yes in step S110), the number of times of activation and the operation time for each load level are stored in the array as the number of times of activation [ load level ] and the operation time [ load level ], respectively, based on the load level determined in the load level determination process of fig. 8 (steps S111 and S112). Finally, the input ON time is cleared (step S113), and the number of times of activation/operating time counting process is repeated. The load level in the present embodiment is a range corresponding to the weight of the load suspended from the electric chain block 100, and for example, 100kg to 200kg, 201kg to 300kg, and the like are divided into a plurality of levels by 1 level.
Next, the load level determination process will be described with reference to fig. 8. The AD conversion output value stored in step S105 of fig. 7 is stored in the load N (step S201), and the load level is set to 1 (step S202). The load N is compared with the level 5 (step S203), and if the load N is equal to or higher than the level 5 (yes in step S203), if the lift operation input is ON (yes in step S204), the lift operation wire cut-off relay 35 that cuts off the lift operation wire is turned ON (step S205), and thereafter, the load level is set to 5 (step S206).
When the load N is less than the level 5 (no in step S203), the load N is compared with the level 4 (step S207), and when the load N is equal to or more than the level 4 (yes in step S207), the load level is set to the level 4 (step S208).
When the load N is less than the level 4 (no in step S207), the load N is compared with the level 3 (step S209), and when the load N is equal to or more than the level 3 (yes in step S209), the load level is set to the level 3 (step S210).
When the load N is less than the level 3 (no in step S209), the load N is compared with the level 2 (step S211), and when the load N is equal to or more than the level 2 (yes in step S211), the load level is set to the level 2 (step S212). After that, the process returns to the starting times/operating time counting process while maintaining the set load level.
According to the present embodiment, the timing of component replacement and the lifetime of the product can be determined according to the load level.
In step S203, the load level 5 is a predetermined value at which the load suspended from the electric chain block 100 (hoist) may fall and the hoist may be broken down. When the load level is equal to or higher than the predetermined value, the load suspended on the electric chain block 100 (hoisting machine) may fall and the hoisting machine may malfunction, and therefore, when an upward operation input is input from the operation input device 5, the upward operation input needs to be cut off. In this embodiment, when the load level is equal to or higher than the predetermined value and the lifting operation input is ON in step S204, the lifting operation wire cut relay 35 is turned ON to cut off the operation in the upward direction. In this way, the lift wire cut relay 35 functions as an overload protection device.
In the present embodiment, the overload protection device is provided, and thereby, the suspended load can be prevented from falling down and the winch can be prevented from malfunctioning.
The load level determination process of fig. 8 will be described with reference to the lift wire off relay release process of fig. 9, as a release method in the case where the lift wire off relay 35 that cuts off the lift wire is turned on.
When the state of the lowering operation input is confirmed and the lowering operation is turned ON (step S301), the counting of the lowering input ON time is started (step S302). When X seconds (predetermined time) or more have elapsed for the lowering operation ON time (yes at step S303), the lift wire cutting relay 35 that cuts the lift wire is turned off (step S304), and the process returns to the starting count/operating time counting process. When the lowering input is performed from the operation input device 5 in this manner, the lift wire breaking relay 35 is released from the breaking.
The method of estimating the component replacement life and the product life in the present embodiment corrects the life value and the component replacement timing predetermined for each product, for example, based on the ratio of the number of starts to the operating time for each load level.
As shown in fig. 6, the data recording device 30 of the present embodiment includes an information output unit 40 that outputs information necessary for estimating the component replacement life and the product life. The information output unit 40 is connected to the CPU37 and the memory 38, and outputs information of the CPU37 and the memory 38 to the outside. The information output unit 40 is connected to and outputs a storage medium 41 such as a USB memory or an SD memory card (registered trademark), a wireless device 42 such as Wi-Fi (registered trademark), and a display 43 such as a liquid crystal screen, thereby enabling information to be output to the outside. The customer, the maintenance worker, and the like determine the time to reach the lifetime and the time to replace the component based on the output information.
According to the present embodiment, since information for determining the time to reach the lifetime and the timing of replacing the component can be easily output, the work efficiency can be improved.
Further, when outputting information, the common line cut relay 34 is turned on to restrict the operation of the electric chain block, thereby enabling safe viewing of information.
As described above, the present embodiment includes the data recording device 30 of the hoist that estimates the timing of replacing the component of the electric chain block 100 (hoist) based on the operation input information of the operation input device 5 that operates the electric chain block 100 (hoist) and the load current of the motor 1 that drives the electric chain block 100 (hoist). The data recording device 30 includes a power supply connector (power supply female connector 17) connected to the control unit 10 that controls the electric chain block 100 (hoisting machine) and supplies power to the motor 1, and an operation connector (operation female connector 18) connected to the control unit 10 and supplying control power based on operation input information of the operation input device 5.
According to the present embodiment, even the installed electric chain block 100 (hoist) can be connected to the data recording device.
The present invention is not limited to the above-described embodiments, and various modifications are possible. The above-described embodiments are described in detail for easy understanding of the present invention, and are not limited to having all the configurations described.
Description of the reference numerals
1, 8230, a motor, 2, 8230, a speed reduction part, 3, 8230, an electromagnetic brake, 4, 8230, an upper sling, 5, 8230, an operation input device, 6, 8230, a chain bucket, 7, 8230, a chain wheel, 8, 8230, a hook part, 9, 8230, a chain, 10, 8230, a control part, 11, 8230, a power female connector, 12, 8230, a power male connector, 13, 8230, an operation female connector, 14, 8230, an operation male connector, 15, 8230, a power cable, 16, 8230, an operation cable, 17, 8230, a power female connector, 18, an operation female connector, 21, 8230, a voltage reduction transformer, 22, 8230, an anti-overwinding device, 23 method 8230, 24 method 8230for an electromagnetic contactor (coil), 30 method 8230for an electromagnetic contactor (contact), 31 method 8230for a data recording device, 32 method 8230for a control circuit board, 33 method 8230for a current sensor, 34 method 8230for a signal element, 35 method 8230for a common line cut-off relay, 36 method 8230for a lift operation line cut-off relay, an AD converter, 37 method 8230for a CPU,38 method 8230for a memory, 39 method 8230for a power supply portion, 40 method 8230for a wireless device, 41 method 8230for an information output portion, 42 method 8230for a storage medium, 42 method 8230for a wireless device, 43 method 8230for a display, 100 method 8230for a chain pulley.
Claims (11)
1. A data recording device that estimates a component replacement timing of a hoisting machine from operation input information of an operation input device for performing an operation of the hoisting machine and a load current of a motor that drives the hoisting machine, characterized in that:
the data recording apparatus includes:
a power supply connector connected to a control unit that controls the hoist, the power supply connector being configured to supply power to the motor; and
and an operation connector connected to a control unit for controlling the hoisting machine, the operation connector being used for supplying control power based on operation input information of the operation input device.
2. The data recording apparatus according to claim 1, wherein:
the data recording device determines a load level based on the weight of the cargo suspended on the hoist,
and storing the starting times and the running time of the winch under each load level.
3. The data recording apparatus according to claim 1, wherein:
the data recording device includes an overload protection device that prohibits the lifting operation by the operation input device when a load level of the load suspended from the hoisting machine is equal to or higher than a predetermined level.
4. A data recording apparatus according to claim 3, wherein:
the data recording device cancels the prohibition of the lifting operation by the overload protection device when the operation input device performs the lowering operation after the overload protection device cuts off the lifting operation.
5. The data recording apparatus according to claim 1, wherein:
the data recording apparatus has an information output section that outputs information on a component replacement timing.
6. The data recording apparatus of claim 5, wherein:
the information output unit is connected with a storage medium.
7. The data recording apparatus of claim 6, wherein:
the storage medium is a USB memory or an SD memory card.
8. The data recording apparatus of claim 5, wherein:
the information output part is connected with a wireless device.
9. The data recording apparatus according to claim 5, wherein:
the information output part is connected with a display.
10. A hoisting machine including an operation input device for operating the hoisting machine, a motor for hoisting a hook portion from which a load is suspended, a control portion for controlling the motor in accordance with the operation input device, and a data recording device for estimating a component replacement timing of the hoisting machine from operation input information of the operation input device and a load current of the motor, the hoisting machine characterized in that:
the data recording device is disposed between the control section and the operation input device which are electrically connected,
the data recording apparatus has a power supply cable for supplying power to the motor and a current sensor that detects a load current of the motor from the power supply cable.
11. A hoisting machine including an operation input device for operating the hoisting machine, a motor for hoisting a hook portion on which a load is suspended, a control portion for controlling the motor in accordance with the operation input device, and a data recording device for estimating a component replacement timing of the hoisting machine from operation input information of the operation input device and a load current of the motor, the hoisting machine characterized in that:
the data recording device is disposed between the control section and the operation input device,
the data recording apparatus has an operation connector connected to the control section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019028588 | 2019-02-20 | ||
| JP2019-028588 | 2019-02-20 | ||
| PCT/JP2020/002128 WO2020170699A1 (en) | 2019-02-20 | 2020-01-22 | Data logging device and hoisting machine provided with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113382950A CN113382950A (en) | 2021-09-10 |
| CN113382950B true CN113382950B (en) | 2023-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080012291.XA Active CN113382950B (en) | 2019-02-20 | 2020-01-22 | Data recording device and hoist having the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7114795B2 (en) |
| CN (1) | CN113382950B (en) |
| WO (1) | WO2020170699A1 (en) |
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| JP3256778B2 (en) * | 1997-09-30 | 2002-02-12 | 株式会社キトー | History display device for electric chain block |
| JP2010030760A (en) * | 2008-07-30 | 2010-02-12 | Kito Corp | Motor driven hoisting device |
| JP2010180001A (en) * | 2009-02-04 | 2010-08-19 | Kamiuchi Electric Works Ltd | Working status management device for crane, and crane equipped with the same |
| CN103121624A (en) * | 2009-11-19 | 2013-05-29 | 株式会社日立产机系统 | Hoist |
| CN104555785A (en) * | 2013-10-21 | 2015-04-29 | 株式会社日立产机系统 | Electric chain hoist |
| CN104822618A (en) * | 2013-03-29 | 2015-08-05 | 株式会社日立产机系统 | Hoist life calculating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197093U (en) * | 1985-05-29 | 1986-12-09 | ||
| JP2623774B2 (en) * | 1988-09-28 | 1997-06-25 | 株式会社明電舎 | Crane life estimation device |
| JPH11179070A (en) * | 1997-12-25 | 1999-07-06 | Matsushita Electric Works Ltd | Hanging device |
| JP3653052B2 (en) * | 2002-02-26 | 2005-05-25 | 東洋エレクトロニクス株式会社 | Magnetic head support device for magnetic card reader |
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2020
- 2020-01-22 JP JP2021501732A patent/JP7114795B2/en active Active
- 2020-01-22 CN CN202080012291.XA patent/CN113382950B/en active Active
- 2020-01-22 WO PCT/JP2020/002128 patent/WO2020170699A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3256778B2 (en) * | 1997-09-30 | 2002-02-12 | 株式会社キトー | History display device for electric chain block |
| JP2010030760A (en) * | 2008-07-30 | 2010-02-12 | Kito Corp | Motor driven hoisting device |
| JP2010180001A (en) * | 2009-02-04 | 2010-08-19 | Kamiuchi Electric Works Ltd | Working status management device for crane, and crane equipped with the same |
| CN103121624A (en) * | 2009-11-19 | 2013-05-29 | 株式会社日立产机系统 | Hoist |
| CN104822618A (en) * | 2013-03-29 | 2015-08-05 | 株式会社日立产机系统 | Hoist life calculating device |
| CN104555785A (en) * | 2013-10-21 | 2015-04-29 | 株式会社日立产机系统 | Electric chain hoist |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7114795B2 (en) | 2022-08-08 |
| CN113382950A (en) | 2021-09-10 |
| JPWO2020170699A1 (en) | 2021-10-07 |
| WO2020170699A1 (en) | 2020-08-27 |
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