JP3532225B2 - Current test equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for testing the continuity of electric equipment, and more particularly to an apparatus for testing a continuity of a circuit breaker. 2. Description of the Related Art In general, at least an instantaneous trip test and a long time-limit trip test are carried out as a current test for a circuit breaker.
Instantaneous tripping test apparatus, the power supply unit to be divided into upper and lower limits of the over current to conduction unit 1 constructed integrally with the conducting portion, the energization operation is done in a predetermined order, hence the power Are connected in series, so that the current test cannot be performed during the replacement time of the test object, and the test efficiency is reduced.
In the long-time trip test, the current test is continued for the longest time of the test object because the test is performed on multiple current-carrying parts by batch processing. There was a problem that the test efficiency was lowered. [0003] The present invention is based on the above-mentioned limitations.
The present invention has been made in view of the problem in the time trip test, and the present invention particularly relates to an energization test apparatus for performing a characteristic test of a circuit breaker. In the long-time trip test in which the inspection of the test object is completed, an energization test device that moves the test object preferentially and replaces the current-carrying part that has completed the inspection with a small moving distance from the attachment / detachment means It is intended to provide. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a current-carrying test apparatus for performing a long-time trip test of a circuit breaker. wherein comprising a detachable means for the installation and removal of the circuit breaker, and control means for selecting a priority order to be connected to the circuit breaker to the plurality of conducting portions Te, the detachable unit, before
It has a plurality of hands for attaching and detaching the circuit breaker and arms for detachable robots supporting the hands on the left and right,
The arm pitch between left and right is variable, the left and right arms
Discharge operation of the circuit breaker to the discharge conveyor,
The removal operation of the circuit breaker from the input conveyor
Can be performed, and the circuit
It is characterized in that it can be moved and exchanged so that the circuit breaker and the current-carrying unit are sequentially connected. [0005] The long-time trip is performed by the current-carrying test apparatus having the above-mentioned structure.
In the test , unlike the conventional batch processing, the test of a plurality of current-carrying parts is individually and randomly terminated by the exchange of the test object based on the priority set in advance for each current-carrying part. In this case, the test object can be replaced immediately, and the power supply efficiency of the power supply unit can be improved. The priority order for the energizing unit is determined from the one closer to the origin of the attaching / detaching unit, so that the moving distance of the attaching / detaching unit is reduced and the waiting time of the energizing unit is reduced. Regarding the pitch between the arms of the attaching / detaching means, the smaller the pitch between the arms, the smaller the movement distance of the operation of exchanging the test object to the current-carrying part. To perform the take-out operation and discharge operation simultaneously at the discharge position of the current-carrying object to the discharge side conveyor,
If the pitch between the arms is adjusted to that position, the attaching / detaching means can operate simultaneously without moving, and the exchange time can be reduced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A characteristic inspection test for a circuit breaker is generally performed on an instantaneous trip characteristic and a long time limit trip characteristic for an overcurrent. In the present embodiment, the instantaneous trip characteristic test is divided into a generation power supply for the upper limit current of the overcurrent and a generation power supply for the lower limit current of the overcurrent, and each of them can be individually energized. The energizing section is provided with first, second, and third units, and the attaching / detaching means sequentially attaches a work as a test object to the energizing sections of the three units. Exchange. In this embodiment, one of the attachment / detachment means is used.
One is an industrial robot (hereinafter referred to as a detachable robot). As a test operation, first the detachable robot
The test object is set in the first energizing unit. A power supply for the upper limit current value is connected to the first power supply unit, and a power supply test is performed. At the same time, the detachable robot sets the test object in the second power supply unit. Next, a power supply for the lower limit current value is connected to the first energizing unit, and an energization test is performed. At the same time, a power supply for the upper limit current value is connected to the second current-carrying unit to perform a power-on test. At this time, the detachable robot sets the test object in the third energizing unit. Next, since the current test of the upper limit value and the lower limit value is completed in the first energizing unit, the detachable robot replaces the test object of the first energizing unit. At the same time, since the test of the upper limit current value has been completed in the second energizing unit, the lower limit current value generating power supply is connected and the test of the lower limit current value is performed. At the same time, a power supply for the upper limit current value is connected to the third energizing section unit to perform the upper limit current value test. By repeating the above operation, during the exchange time of the test object, the generated power is switched to another current-carrying unit, and the current-carrying test can be performed at the same time, so that the test efficiency can be improved. The switching means for sequentially shifting and connecting the divided power supplies to the plurality of current-carrying unit units can be realized by switching the current-carrying connection with an electromagnetic switch provided in the control box. [0007] The current-carrying unit for the long time trip test is 20
One replacement robot is provided for each of the current-carrying units for attaching and detaching a test object to and from the current-carrying unit. The arrangement of the detachable robot
The center position of the 20 current-carrying unit units arranged in a line is set as the origin, and the replacement priority of the test object close to the origin is increased. Thus, for example, when the tests of the energized unit that is far from the position of the detachable robot and the energized unit that is close to it are almost completed at the same time, the test object of the energized unit that is closer to the detachable robot is replaced first, so that the detachable robot is replaced. And the test time can be improved. The detachable robot has a plurality of arms on the left and right, and the pitch between the left and right arms can be changed by using an air cylinder for each of the right arm and the left arm. As a result, the pitch between the arms is reduced for exchanging the test object in the energizing unit,
When attaching and detaching the test object from the non-defective product conveyor and the defective product discharge conveyor, the movement time of the detachable robot can be reduced by increasing the pitch between the arms and operating the left and right arms simultaneously. The command given to the detachable robot to replace the test object with respect to the plurality of energized units whose tests are randomly terminated is determined when the next untested test object is gripped by the hand of the detachable robot. . Thus, just before the detachable robot starts moving, when the current-carrying unit at the position where the moving distance is short has completed the test, the test object is exchanged with respect to the current-carrying unit at a closer position. The pitch between the right arm and the left arm of the detachable robot is changed by the drive cylinder that changes and adjusts the pitch between the arms of the detachable robot, and when the test object is exchanged by the energizing unit and when the specimen is removed from the supply conveyor, The pitch between the arms can be changed between the unloading operation and the unloading operation. Hereinafter, an energization test apparatus of the present invention will be described in detail based on embodiments. FIG. 1 is a perspective view showing an entire appearance of an automatic inspection device for performing a characteristic inspection of a fuse-free circuit breaker according to an embodiment of the present invention, and is attached to a side surface of the circuit breaker in an assembly line of the circuit breaker. This is a device that discriminates the model based on the barcode, automatically performs setup, and consistently inspects the mechanical part and the energized part. The inspection line configuration consists of three conducting units for continuity inspection, withstand voltage inspection, upper limit instantaneous trip inspection, and lower limit instantaneous trip inspection, and 20 energizing unit units for long time delay trip inspection. Has become. Material handling unit 1 for converting the test object flowing from the previous process, that is, the fuse-free circuit breaker, into the test position (vertical direction), instantaneous sample input conveyor 2 for transporting the test object in the vertical position, continuity check, upper limit Instantaneous trip inspection unit 3 for conducting, withstanding and withstanding voltage and instantaneous trip inspections, each of which has three energizing units for performing instantaneous trip inspection and lower limit instantaneous trip inspection, and mounting the test object on these energizing unit units The detachable robot 4 for taking out the product, the instantaneous defective product marking unit 5 for performing identification marking on the test object rejected as a result of the inspection by the instantaneous trip inspection unit 3, and the rejected test object are discharged out of the apparatus. The defective product discharge conveyor 6 and the long time trip inspection unit 7 having 20 current-carrying units to be subjected to the long time trip inspection, the test object for each current unit A detachable robot 8 for attaching and detaching, a long-time defective marking unit 9 for applying an identification mark to an object that has failed as a result of inspection by the long-time trip inspection unit 7, Defective product discharge conveyor 10 to be discharged outside, non-defective product conveyer 11 for transporting acceptable products, that is, non-defective products, personal computer 12 for monitoring the overall inspection status, and conduction, withstand voltage, It is composed of a switching circuit box 14 for issuing a command control to be shifted and connected to a power supply unit 13 for instantaneous trip, a long time trip power supply unit 15 for 20 energizing unit units, a backup circuit box 16 and the like. The trip characteristic of the fuse-free circuit breaker in the case of an overcurrent is shown in FIG. 3. In the instantaneous trip test, the fuse-free circuit breaker operates by applying the upper limit current shown by arrow B and the lower limit current shown by arrow C. Should be inoperative when the power is turned on,
This characteristic test is performed, and in the long time limit trip test, it is checked whether or not the device operates within the operation time range indicated by the arrow A by applying a current twice the rated current value. In the instantaneous trip test of this embodiment, as shown in FIG. 2, a power supply for continuity check and upper limit instantaneous trip inspection is integrated, and a withstand voltage check and a lower limit instantaneous trip inspection power source are integrated. The power supply test is performed efficiently using the two divided power supply units. 4 and 5
FIG. 4 is a comparison operation diagram of the energizing method according to the embodiment of the present invention and a conventional energizing method in an instantaneous trip inspection. In the figure, arrow D indicates the passage of time, and arrow E indicates the movement of the test object. In FIG. 4, the conventional energization method by series connection (a) is a system in which upper and lower limit energization tests are performed on one energized portion by an upper and lower limit integrated power supply after the test object is replaced. Further, the conventional switching energization method (b) is a method in which an energization test is alternately performed on two energized parts by a power supply integrated with upper and lower limits, and the test object exchange and the energization test can be performed simultaneously. From
The test can be completed by the tact of conducting the conduction test. The shift energizing method (c) of the embodiment of the present invention is as follows.
In order to further shorten the tact time as compared with the conventional switching energizing method (b), the divided upper limit current value test, lower limit current value test, and replacement of the test object are performed for the three energizing unit units. This is a method of sequentially shifting the operation. When the shift energization is to be performed by further increasing the number of energized units, the test items are divided into N-1 with respect to the number N of energized units, and the divided test time and test object attaching / detaching time are substantially reduced. By making them equal, the tact time can be further reduced. That is,
FIG. 5 shows a conventional technique (a) in which four energizing unit units are provided and two energizing unit units are energized exclusively for the upper limit test and for the lower limit test, respectively, and shift energization according to the embodiment of the present invention. FIG. 4B is a diagram comparing the method (b). In the conventional method, the number of times of attachment and detachment of the test object is large, so that the waiting time of the energizing unit is long. It can be seen that there is no time and the test efficiency is significantly improved. FIG. 6 is an operation diagram showing an energization method according to another embodiment of the present invention. This embodiment shows an energization method in a case where different types of test objects are randomly inputted in the instantaneous time trip inspection, and even if different types are mixed in arrows F and G in the figure, the setup is performed. The time can be reduced, and an efficient energization test can be performed. FIG. 7 is a diagram showing the supply of the test object 20 to the current-carrying unit 17 during the execution of the long time-limit trip test. NO. 1 to NO. The test object attaching / detaching robot 8 takes out the test object 20 from the supply conveyor 18 by the supply arm 8a with respect to the 20 conducting unit units 17. First, the energizing unit 17 for setting the test object 20 is NO. 1
0, and the subject attachment / detachment priority is NO. 10, NO. 1
1, NO. 9, NO. 12, NO. 8,... NO. 1, N
O. It is lower in the order of 20. Long time trip test
Although the supply arm 8a chucks the test object 20 in a random manner for each test object 20, the supply unit 8 can supply and move, and after the high-priority energizing unit 17 has completed the test, the destination is changed and the priority is changed. 20 of the current-carrying unit 17 having a high
Perform a replacement. The attachment and detachment of the test object 20 is performed by removing the tested test object 20 b with the discharge arm 8 b of the test object attachment / detachment robot 8.
After being taken out by the discharge arm 8b, it is shifted laterally by the pitch p between the arms, and the untested test object 20a is supplied to the current-carrying unit 17 by the supply arm 8a. In this test object attaching / detaching operation, the pitch p between the arms of the attaching / detaching robot is preferably small as shown in FIG. 8 in order to shorten the lateral shift distance corresponding to the arm pitch p. However, it is advantageous that the operation of discharging the test object 20 to the discharge conveyor 11 and the operation of taking out the test object 20 from the test object input conveyor 18 be performed at the same time. Must match. Therefore, the arm cylinder 19 shown in FIG. 8 is configured to change the pitch p between the arms during the movement of the detachable robot. According to the present invention, by shifting the power supply and connecting the power supply, the priority order of the test objects is changed in the long time trip test, thereby reducing the moving distance of the test object attaching / detaching robot. Further, by making the pitch between the arms of the detachable robot variable, the simultaneous operation of the left and right arms becomes possible, thereby shortening the time and improving the test efficiency of the current-carrying part.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an entire appearance of an automatic inspection device for inspecting characteristics of a circuit breaker according to an embodiment of the present invention. FIG. 2 is a schematic flowchart of test items according to the embodiment of the present invention. FIG. 3 is an overcurrent trip characteristic curve diagram of the circuit breaker according to the embodiment of the present invention. FIG. 4 is a comparative operation diagram of an energizing method according to an embodiment of the present invention and a conventional energizing method. FIG. 5 is a comparative operation diagram of an energizing method according to the embodiment of the present invention and a conventional energizing method. FIG. 6 is an operation diagram showing an energization method according to another embodiment of the present invention. FIG. 7 is a diagram showing supply of a test object to a long time-limit trip energizing unit according to the embodiment of the present invention. FIG. 8 is an external perspective view of a robot for attaching and detaching an object according to an embodiment of the present invention. [Explanation of Signs] 1 Material handling unit 2 Instantaneous specimen loading conveyor 3 Instantaneous trip inspection unit 4 Instantaneous specimen attaching / detaching robot 5 Instantaneous defective product marking unit 6 Defective product discharge conveyor 7 Long time delay Removal inspecting unit 8 ... Long-time inspection object attaching / detaching robot 9 ... Long-time defect marking unit 10 ... Defective item discharging conveyor 11 ... Good product unloading conveyor 12 ... PC 13 ... Power supply unit for instantaneous trip 14 ... Switching circuit box 15 ... Long Power supply unit for timed trip 16 Backup circuit box 17 Power supply unit 18 Long conveyor for charging timed test object 19 Arm cylinder 20 Test object

Claims (1)

(57) [Claim 1] In an energization test apparatus for performing a long-time trip test of a circuit breaker , a plurality of energized parts, and mounting and dismounting of the circuit breaker with respect to the energized part are performed. Attaching and detaching means, and a control means for selecting a priority order in which the circuit breakers should be connected to the plurality of current-carrying parts, wherein the attaching and detaching means comprises a plurality of hands for attaching and detaching the circuit breakers. Arms of a detachable robot that supports the hand are provided on the left and right, and the pitch between the left and right arms is variable, and the left and right arms are provided with the circuit breaker to a discharge conveyor.
Of the circuit breaker from the charging conveyor
Out operation can be performed at the same time, conduction test apparatus characterized by said conducting portion and said circuit breaker can be mobile switching to sequentially connected by command of the control means.