JPH11106188A - History display device for electric chain block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a history display device of an electric chain block which is capable of arbitrarily checking the history that the electric chain block was actually actuated, i.e., the total operation frequency and the total operation time of the actual operation at the desired time, compact in size, and simple in operation. SOLUTION: A history display device 17 provided with a measuring means to measure the winding/unwinding operation frequency and the operation time, a storing means to accumulate and store the operation frequency and the operation time measured by the measuring means, one reading means to read the total operation frequency and the total operation time stored in the storing means, and one display means (a display part 22) to successively display the total operation frequency and the total operation time in one reading of the reading means, is provided in an electric equipment part 15 of an electric chain block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric chain which stores the total number of operations and the total operation time of an electric chain block for hoisting and unwinding a load, and arbitrarily reads out and displays the total number of operations and the total operation time. The present invention relates to an electric chain block history display device capable of confirming the history of a block.

[0002]

2. Description of the Related Art Since an electric chain block hoists and unloads a heavy load, there is a time when a mechanical component constituting a mechanical portion has a life due to wear or metal fatigue. In addition, there is a time when an electric component constituting an electric component such as an electromagnetic switch or a relay has a life due to electric spark, mechanical wear, or the like.

[0003] As described above, mechanical components and electrical components need to be replaced or repaired before the end of their life due to safety measures. Conventionally, failure or breakage of these components occurs, or the life of components, replacement time, and repair time are predicted in consideration of the elapsed time since the installation of the electric chain block, and The technique of replacing or repairing is used.

[0004]

However, a method of replacing or repairing a component after a failure or breakage of the component as described above is not preferable in terms of safety measures. In addition, the method of replacing or repairing by estimating the service life, replacement time, and repair time of the component parts in consideration of the elapsed time since the installation of the electric chain block does not reach the service life yet and can be sufficiently used In some cases, components are replaced or unnecessary repairs are performed, which is not economical.

The present invention has been made in view of the above points, and it is possible to arbitrarily confirm the history of actual operation of an electric chain block, that is, the total number of actual operations and the total operation time when desired. It is an object to provide a history display device for an electric chain block.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a measuring means for measuring the number of times of hoisting and lowering an electric chain block and the operating time, and the number of times of operation measured by the measuring means. Storage means for accumulating and storing the operating time, one reading means for reading the total number of operations and the total operating time stored in the storage means, and displaying the total number of operations and the total operating time read by the reading means And a display unit configured to sequentially display the total number of operations and the total operation time or the total operation time and the total number of operations on the display unit in response to a single reading instruction from the reading unit. The display means is provided.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the appearance of an electric chain block equipped with a history display device according to the present invention, wherein FIG. 1 (a) is a left side view and FIG. 1 (b) is a front view. As shown in the figure, the electric chain block includes a main unit 13 including a sprocket, a drive shaft, a brake, and the like (not shown) for winding and rewinding the chain 12, a motor unit 14 for driving the main unit 13, a control device, And an electrical component 15 on which the electrical components are mounted, and the history display device 17 of the present invention is mounted in an electrical component cover 16 of the electrical component 15. Reference numeral 18 denotes a hook for attaching an electric chain block, 19 denotes a hook for lifting and lowering a load, 2
Reference numeral 0 denotes a storage box for storing the chain 12.

FIG. 2 is a diagram showing the configuration of the history display device 17. 1, the history display device 17 includes a central processing unit (CPU) 21, a display unit 22, a storage unit 23, and a display switch 24. The central processing unit 21 is configured by, for example, a 4-bit CPU, the display unit 22 is configured by, for example, an LCD, and the storage unit 23 is configured by an operation number storage unit 23a that stores the operation number and an operation time storage unit 23b that stores the operation time. Is done. Further, the central processing unit 21 outputs a closing signal (O) of the button switch 25 for winding operation of the electric chain block.
N signal) is input through the resistor 26. The components constituting the history display device are mounted on a single board, and the board is mounted on the electrical unit 1 in the electrical cover 16.
5

The central processing unit 21 includes a hoisting operation button switch 2 which is closed each time the electric chain hoisting operation is performed.
5 is counted, and the counted number is stored as an operation count in the operation count storage section 23a of the storage section 23, and the duration of the ON signal of the hoisting operation button switch 25 is measured. It is stored in the storage unit 23b. Further, each time an ON signal of the hoisting operation button switch 25 is input, it is added to the previous count number and stored in the operation count storage unit 23a. Further, the measurement time of the ON signal is added to the measurement time up to the previous time and stored in the operation time storage unit 23b.

In the above example, the number of times of inputting the ON signal of the winding operation button switch 25 is measured as the number of operations, and the duration is measured as the operation time. However, the method of measuring the number of operations and the operation time is not limited thereto. However, for example, the number of times the lowering operation button switch ON signal is input may be set as the number of operations, and the duration may be set as the operation time. May be measured as the operation time. In short, any number of input signals and input times may be used as long as the signal can measure the number of operations and the operation time.

In the history display device having the above structure, the central processing unit 21 shifts from the standby state to the measurement state by the ON signal of the hoisting operation button switch 25, and starts measuring the operation time. The measurement is terminated when the ON signal is turned off for a predetermined time (for example, 32.5 mSec) or more, the number of operations is updated, and the state shifts to a standby state. During this measurement state, the display unit 22
Is not displayed. Then, by closing (ON) the display switch 24, the central processing unit 21 reads out the total number of operations and the total operation time from the number-of-operations storage unit 23a and the operation time storage unit 23b, respectively. The total operation time is displayed by a predetermined display method.

FIG. 3 is a view showing a display example of the display unit 22. As shown in FIG. First, when the display switch 24 is turned on from the standby state, the display unit 22 displays a symbol “H” indicating one hour as a display unit, followed by a total operation time (“1234” in the figure) as shown in FIG. Is displayed for a predetermined time (for example, 3.0 sec). Thereafter, as shown in FIG. 3B, the display is automatically turned off for a predetermined time (for example, 1.0 sec). Subsequently, as shown in FIG. 7C, the total number of operations (“5678” in the figure) is displayed for a predetermined time (for example, 3.0 Sec) following the code “C” indicating the count number. The display is turned off as shown in FIG.

The history display device having the above configuration has a test mode for confirming whether or not the device operates reliably.
In order to enter the test mode, test terminals (test pads) 27 and 28 provided on the history display device (the test terminals 27 and 28 are mounted on the back surface of the substrate on which the components of the history display device 17 are mounted). Is provided at a position where it cannot be used normally).
N, and then turning OFF, the mode shifts to the test mode. Then, a test display is performed on the display unit 22, and the number of operations and the operation time stored in the number-of-operations storage unit 23a and the operation time storage unit 23b are cleared.

FIG. 4 is a diagram showing a flow of the operation in the test mode, and FIG. 5 is a diagram showing a display example of the display unit 22 in the test mode. As described above, the test terminals (test pads) 27 and 28 are short-circuited, the display switch 24 is turned on,
Subsequently, when the test mode is entered by turning OFF (steps ST1, ST2, ST3), a total number of operations ("1234" in the figure) is followed by a sign "C" indicating the count number as shown in FIG. ) Is displayed (step ST).
4) Then, the display shifts to the test display.

In the test display, first, as shown in FIG. 5B, a display test of the least significant digit is performed (step ST).
5) Subsequently, the display is performed by sequentially increasing the number of digits, and FIG.
Is displayed up to the highest digit as shown in FIG.
888 ") (step ST6), the number of operations and the operation time are reset (step ST7).
The display is turned off as shown in (d) (step ST).
8).

By providing the history display device having the above-described configuration in the electrical unit 15 of the electric chain block, it is possible to check the history of the electric chain block, that is, the total number of operations and the total operation time so far. By removing the electrical cover 16 and operating one display switch 24, the total number of operations and the total operation time or the total operation time and the total number of operations are sequentially displayed on one display unit 22. And one display switch 24 and one display unit 22 as one reading means for displaying the total operation time.
So that the history display device can be made compact,
The operation for checking the history is simplified.

[0017]

As described above, according to the present invention, the electric chain block is provided with measuring means for measuring the number of times of winding and unwinding and the operating time thereof, and the number of times of operation and the operating time measured by the measuring means. Means for accumulating and storing data, and reading out the total number of operations and the total operation time stored in the storage means.
Read means, and one display means for displaying the total number of operations and the total operation time read by the read means. Since the history display means configured to sequentially display the total operation time or the total operation time and the total number of operations is provided, the following excellent effects can be obtained.

The history of the total number of operation times and the total operation time of the electric chain block can be accurately known, and it is possible to appropriately cope with maintenance such as replacement of components.

Since the total number of operations and the total operation time or the total operation time and the total number of operations are sequentially displayed on one display means by one reading instruction by one reading means, the apparatus can be downsized.

Since the total number of operations and the total operation time or the total operation time and the total number of operations are sequentially displayed on one display means by one reading instruction, the operation for knowing the history is simplified.

[Brief description of the drawings]

FIG. 1 is a view showing the appearance of an electric chain block equipped with a history display device of the present invention, wherein FIG. 1 (a) is a left side view and FIG. 1 (b) is a front view.

FIG. 2 is a diagram showing a configuration of an electric chain block history display device of the present invention.

FIG. 3 is a diagram illustrating a display example of a display unit of the history display device for an electric chain block according to the present invention.

FIG. 4 is a diagram showing a flow of an operation in a test mode of the history display device for an electric chain block according to the present invention.

FIG. 5 is a diagram showing a display example of a display unit in a test mode of the history display device for an electric chain block of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Chain 13 Main part 14 Motor part 15 Electrical part 16 Electrical cover 17 History display device 18 Hook 19 Hook 20 Storage box 21 Central processing unit 22 Display part 23 Storage part 24 Display switch 25 Button switch for winding operation 26 Resistor

Claims (1)

[Claims] 1. A measuring means for measuring the number of times of hoisting and unwinding and the operating time of the electric chain block, a storing means for accumulating and storing the number of times of operating and the operating time measured by the measuring means, and Means for reading the total number of operations and the total operation time stored in the means, and one display means for displaying the total number of operations and the total operation time read by the reading means; And a history display means configured to sequentially display the total number of operations and the total operation time or the total operation time and the total number of operations on the display means in response to a single readout instruction of the electric chain block. History display device.