JP5374263B2 - Relay characteristic adjustment system and relay characteristic adjustment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automate adjustment of characteristics such as a working voltage and open voltage with accuracy equal to a highly-skilled operator. <P>SOLUTION: A characteristic detection device includes a load cell 22 for measuring force acting on a movable contact 5 from a movable spring 3 and electromagnetic device 6 of a relay Ry as characteristic information. Restoring force Fa of the movable spring 3 and attractive force Fb of the electromagnetic device 6 act on the movable contact 5, and resultant force of these restoring force Fa and attractive force Fb acts on a card 7. Therefore, the load cell 22 measures the resultant force by measuring force acting on the card 7. The measurement results of the load cell 22 are used to determine a twist amount of the movable spring 3. Balance of the restoring force Fa of the movable spring 3 and the attractive force Fb of the electromagnetic device 6 can be adjusted by twisting the movable spring based on the amount of twist. Accordingly the characteristics such as the working voltage and open voltage can be adjusted. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a relay characteristic adjustment system and a relay characteristic adjustment method used for adjusting characteristics such as a moving voltage and an open-circuit voltage, which are performed at the time of manufacturing a relay in order to realize normal operation of the relay.

  Conventionally, for example, as shown in FIG. 13, a fixed contact 2 and a movable contact 5 that can be brought into and out of contact with each other, and an electromagnet device 6 that generates a magnetic force so as to move the movable contact 5 when the coil 61 is energized. A relay Ry provided in the inside (not shown) is provided (see, for example, Patent Document 1). The relay Ry illustrated in FIG. 13 includes a fixed terminal plate 1 that holds the fixed contact 2 and a movable spring 3 that is made of a leaf spring and holds the movable contact 5 movably within a specified range. The electromagnet device 6 generates an attractive force so that the armature 62 is attracted to the magnetic pole piece 63b when the coil 61 is energized, so that the movable contact 5 moves to a position where it contacts the fixed contact 2.

  By the way, in this type of relay Ry, characteristics such as a moving voltage and an open voltage may vary depending on a slight difference in the degree of bending of the movable spring 3 and a variation in the attractive force generated by the electromagnet device 6. Therefore, in order to realize a normal operation with no variation among individuals, it is necessary to adjust individual characteristics at the time of manufacture. In adjusting the characteristics of the relay Ry, the operator manually checks the contact state of each relay Ry while manually twisting the fixed terminal plate 1 and the movable spring 3 to increase the distance between the fixed contact 2 and the movable contact 5. Done by adjusting.

  Specifically, in order to realize the normal operation of the relay Ry, the voltage applied to the coil 61 is more than a specified voltage (moving voltage) and the contact is turned on (or turned off), and the specified voltage (open voltage). In the following, the contact is turned off (or turned on), the amount of overtravel (OT) is appropriate, and a constant contact pressure can be secured when the contact is turned on, and the armature 62 contacts the magnetic pole piece 63b when the moving voltage is applied ( Hereinafter, it is necessary to satisfy the four items of reaching the end position), and the adjustment amount (the amount of twist of the fixed terminal plate 1 and the movable spring 3) is determined so as to satisfy these four items. The overtravel amount refers to an amount by which the movable contact 5 is further pushed into the fixed contact 2 side by the movement of the armature 62 after the movable contact 5 contacts the fixed contact 2. In addition, the phenomenon that the armature 62 does not reach the end position is caused by an increase in the force in the direction in which the contact contacts and the movable spring 3 is pushed back. As the voltage applied to the coil 61 is increased, the electromagnet Since the suction force of the device 6 increases and the armature 62 reaches the end position, this is called “two-stage operation”.

JP 10-162710 A (paragraph 0015-0023)

  However, when performing the above characteristic adjustments, for example, fine adjustments such as an angle adjustment on the order of 1 degree or less and a position adjustment on the order of 0.1 mm or less are necessary. Advanced skills are required. For this reason, it takes time to acquire the skill of the operator, and furthermore, even in the actual characteristic adjustment scene, it takes about several seconds per work, which hinders the improvement of the production efficiency of the relay Ry.

  It is also conceivable to take an image of the contact state and the like, and automatically determine the adjustment amount based on the image. However, there are requirements that the operator cannot visually determine, such as variations in the attractive force generated by the electromagnet device 6. Adjustments are made based on experience and intuition, and it is difficult to automate characteristic adjustment with the same accuracy.

  The present invention has been made in view of the above reasons, and a relay characteristic adjustment system capable of automating adjustment of characteristics such as a moving voltage and an open-circuit voltage with an accuracy equivalent to a worker having high skill, It is an object to provide a method for adjusting relay characteristics.

The invention according to claim 1, and detachably fixed contacts and the movable contact with one another, a fixed terminal board for holding said stationary contact, a movable spring for movably holding the movable contact within the specified range, the coil targeting relay with an electromagnet device for generating magnetic force to move the movable contact when energized, relay characteristic used to adjust the characteristics to be performed by twisting at least one of said movable spring and the fixed terminal plate a regulating system, by using the current apparatus that performs energization of the coil, the characteristic detector for detecting characteristic information of the relay to be a detection result of said characteristic detection device at the time of energization of the coil , and an arithmetic unit for determining the amount of twist of the fixed terminal plate and the movable spring according to the criteria defined in advance, the characteristic detection apparatus, the movable spring and the solenoid It includes a haptic system measuring unit for measuring the force acting on the movable contact from the apparatus as the characteristic information, and an electrical system measuring unit for detecting an electrical connection state of the fixed contact and the movable contact as the characteristic information It is characterized by.

According to this configuration, the characteristic detection device includes the force sensor measuring unit that measures the force acting on the movable contact from the movable spring and the electromagnet device as the characteristic information, and the arithmetic device uses the characteristic information according to the determination criterion. Since the torsion amounts of the fixed terminal plate and the movable spring are determined, the torsion amount can be obtained in consideration of requirements that cannot be visually discriminated such as variations in the attractive force generated by the electromagnet device. As a result, the adjustment of characteristics such as the moving voltage and the open voltage can be automated with the same accuracy as a highly skilled worker. In addition, according to this configuration, in the arithmetic device, in addition to the measurement result of the force sense measurement unit, the detection result of the electrical connection state of the fixed contact and the movable contact is used to calculate the torsion amounts of the fixed terminal plate and the movable spring. Therefore, the characteristic adjustment with higher accuracy can be realized as compared with the case where the twist amount is determined only from the measurement result of the haptic measurement unit.

Wherein the invention according to claim 2, characterized in that in the invention of claim 1, wherein the characteristic detection apparatus, comprising a camera for capturing an image of a region including said fixed contact and said moving contact, at least the fixed contact from the image A visual system measurement unit that detects a contact state with the movable contact as the characteristic information is included.

  According to this configuration, in the arithmetic device, the torsion amounts of the fixed terminal plate and the movable spring are determined using the characteristic information detected from the image in addition to the measurement result of the force sense measurement unit. Compared with the case where the twist amount is determined only from the measurement result of the part, it is possible to realize characteristic adjustment with higher accuracy.

According to a third aspect of the invention, there is provided the adjusting device according to the first or second aspect , further comprising an adjusting device for twisting at least one of the fixed terminal plate and the movable spring by an amount of twist obtained by the arithmetic device. Features.

  According to this configuration, the work of twisting the fixed terminal plate and the movable spring can be automated, so that the production efficiency of the relay can be further improved. In addition, the structure which twists a movable spring is not restricted to what twists a movable spring directly, For example, when a movable spring is supported by the movable terminal board, it can move by twisting the said movable terminal board and changing the angle of a movable terminal board. The angle of the spring may be changed.

The invention according to claim 4, and detachably fixed contacts and the movable contact with one another, a fixed terminal board for holding said stationary contact, a movable spring for movably holding the movable contact within the specified range, the coil targeting relay with an electromagnet device for generating magnetic force to move the movable contact when energized, relay characteristic used to adjust the characteristics to be performed by twisting at least one of said movable spring and the fixed terminal plate a preparation method, by using the current process of performing energization of the coil, the characteristic detection step of detecting the characteristic information of the relay to be a detection result of said characteristic detection step during energization of the coil , and a calculation process of determining twist of the fixed terminal plate and the movable spring according to the criteria defined in advance, the characteristic detecting process, the movable spring and the electromagnet instrumentation And force measuring step of measuring the force acting on the movable contact as the characteristic information from, characterized in that it comprises a step of detecting an electrical connection state of the fixed contact and the movable contact as the characteristic information.

According to the present invention, the characteristic detection process includes a force measurement process for measuring the force acting on the movable contact from the movable spring and the electromagnet device as the characteristic information. In the calculation process, the fixed terminal according to the determination criterion using the characteristic information. Since the torsion amounts of the plate and the movable spring are determined, the torsion amount can be obtained in consideration of requirements that cannot be visually determined, such as variations in the attractive force generated by the electromagnet device. As a result, the adjustment of characteristics such as the moving voltage and the open voltage can be automated with the same accuracy as a highly skilled worker. Further, according to the present invention, in the calculation process, the torsion amounts of the fixed terminal plate and the movable spring are determined using the detection result of the electrical connection state of the fixed contact and the movable contact in addition to the measurement result of the force measurement process. Therefore, compared with the case where the twist amount is determined only from the measurement result of the force measurement process, the characteristic adjustment with higher accuracy can be realized.

  Since the present invention determines the torsion amount of the fixed terminal plate and the movable spring using the measurement result of the force acting on the movable contact from the movable spring and the electromagnet device, adjustment of characteristics such as the moving voltage and the open voltage can be performed with high skill. There is an advantage that it can be automated with the same accuracy as an operator having

It is the schematic which shows the principal part of Embodiment 1 of this invention. It is a block diagram which shows a system configuration same as the above. It is a block diagram which shows a force sense system measurement part same as the above. It is a block diagram which shows an arithmetic unit same as the above. It is the schematic which shows the adjustment method same as the above. It is explanatory drawing which shows the voltage application pattern used in the same as the above. It is a flowchart which shows operation | movement same as the above. It is a graph which shows the measurement result of a force sense system measurement part same as the above. It is a graph which shows the other measurement result of a force sense system measurement part same as the above. It is a graph which shows the other measurement result of a force sense system measurement part same as the above. It is explanatory drawing which shows the process used in Embodiment 3 of this invention. It is explanatory drawing same as the above. It is the schematic which shows the structure of a relay.

  In the following embodiments, a relay characteristic adjustment system used for adjusting characteristics such as a moving voltage and an open-circuit voltage is exemplified for the relay Ry of FIG. 13 described in the background art section. Here, the configuration of the relay Ry shown in FIG. 13 will be briefly described.

  In the relay Ry illustrated in FIG. 13, a pair of fixed terminal plates 1 are provided so as to be parallel to each other, and are erected in a penetrating state on a bottom plate of a case (not shown). The fixed contact 2 is provided on the same side (right side in FIG. 13) of each fixed terminal plate 1. A pair of movable springs 3 are provided so as to correspond to the respective fixed terminal plates 1, and the respective base end portions penetrate through the bottom plate of the case so that the respective distal end portions are arranged to face the respective fixed contacts 2. It is being fixed with respect to the movable terminal board 4 standingly arranged by. The movable contact 5 is provided at a portion of each movable spring 3 facing the fixed contact 2, and is biased to a position away from the fixed contact 2 by the spring force of the movable spring 3 when the coil 61 is not energized. FIG. 13 is a schematic diagram of the relay Ry viewed from above (a direction orthogonal to the bottom surface of the case).

  The electromagnet device 6 has a cylindrical coil bobbin (not shown) wound between a pair of movable springs 3 around which a coil 61 is wound, an amateur (iron core) 62 made of a magnetic metal material, and a permanent magnet. (Not shown), a yoke 63, and a coil terminal (not shown) for energizing the coil 61. The amateur 62 is formed in a rod shape, and one end portion is disposed between the pair of fixed terminal plates 1 and the other end portion is supported in a swingable manner with the other end portion being inserted into the coil bobbin. The yoke 63 forms a magnetic path of a magnetic flux generated when the coil 61 is excited. The yoke 63 is erected between one end of the armature 62 and each fixed terminal plate 1, and each N is formed by a permanent magnet. It has a pair of magnetic pole pieces 63a and 63b magnetized to a pole and an S pole (in FIG. 13, the right pole piece 63a is the N pole and the left pole piece 63b is the S pole).

  Furthermore, the card | curd 7 which tells the movement of the amateur 62 to the movable contact 5 is provided in relay Ry. The card 7 has a configuration in which a portion closer to the movable contact 5 than an intermediate portion in the longitudinal direction of both movable springs 3 is mechanically connected to the amateur 62.

  Next, the operation of the relay Ry will be described. When the coil 61 of the electromagnet device 6 is energized, the attractive force Fb acts on the armature 62 so as to form a closed magnetic path through which the magnetic flux generated by exciting the coil 61 passes, and the one end of the armature 62 excited to the N pole. The part is attracted to the pole piece 63b on the S pole side and swings. At this time, the movable spring 3 connected to the amateur 62 via the card 7 is driven, and each movable contact 5 moves to a position where it contacts the corresponding fixed contact 2 against the spring force of the movable spring 3. To do. Thereafter, when energization to the coil 61 of the electromagnet device 6 is stopped, the one end of the armature 62 is returned to a position where it abuts on the magnetic pole piece 63a on the N pole side by the restoring force Fa generated by the movable spring 3, and each movable contact 5 moves to a position separated from the fixed contact 2. That is, in the relay Ry of FIG. 13, the contact is off when the coil 61 of the electromagnet device 6 is not energized, and the contact is turned on when the coil 61 is energized.

  In the relay Ry described above, characteristics such as a moving voltage and an open voltage may vary due to a slight difference in the degree of bending of the movable spring 3 and variations in the attractive force Fb generated by the electromagnet device 6. Therefore, in order to realize a normal operation with no variation for each individual, the fixed terminal plate 1 and the movable spring 3 are twisted to adjust the distance between the fixed contact 2 and the movable contact 5 to thereby change the characteristics of each relay Ry. It is necessary to make adjustments. The relay characteristic adjustment system described in the following embodiments is for automating such characteristic adjustment.

(Embodiment 1)
As shown in FIG. 2, the relay characteristic adjustment system of the present embodiment includes an energization device 10 that energizes the coil 61, a characteristic detection device 20 that detects characteristic information of the relay Ry, the fixed terminal plate 1 and the movable spring. 3 and an adjustment device 40 that adjusts the characteristics by twisting the fixed terminal plate 1 and the movable spring 3.

  The energization device 10 is configured to be able to adjust the magnitude of the voltage applied to the coil 61 at least within a range equal to or less than the rated voltage of the relay Ry. By changing the voltage applied to the coil 61, the contact point of the relay Ry Can be turned on and off.

  The characteristic detection device 20 includes a force sense measuring unit 21 that measures the force acting on the movable contact 5 from the movable spring 3 and the electromagnet device 6 as characteristic information. As shown in FIG. 3, the force sensor measuring unit 21 measures the force acting on the card 7 of the relay Ry, the displacement sensor 23 that measures the stroke of the armature 62, and the outputs of the load cell 22 and the displacement sensor 23. To a characteristic recognizing unit 24 for obtaining a force acting on the card 7 at each stroke position of the amateur 62.

  As shown in FIG. 1, two load cells 22 are provided so as to sandwich the card 7 of the target relay Ry from both sides in the moving direction, and each measuring element 25 is applied to both end surfaces of the card 7 in the moving direction. The force acting on the card 7 is measured by the contacted configuration. Thus, in one load cell 22 (left side in FIG. 1), the force acting in the direction of closing the contact with respect to the movable contact 5 (in contact with the fixed contact 2) can be measured, and in the other load cell 22, the movable contact 5 The force acting in the direction of opening the contact (separating from the fixed contact 2) can be measured. Note that a U-shaped attachment (not shown) that sandwiches the card 7 from both sides in the moving direction is used to connect the probe 25 of the load cell 22 to the attachment so that the contact acting on the movable contact 5 is closed. Both the force and the force on the contact opening side may be measured by one load cell 22.

  Here, both the restoring force Fa of the movable spring 3 and the attractive force Fb of the electromagnet device 6 act on the movable contact 5, and the resultant force of the restoring force Fa and the attractive force Fb is applied to the card 7. Since the load cell 22 acts, the load cell 22 can measure the resultant force by measuring the force acting on the card 7.

  The displacement sensor 23 has a stroke position of one end of the armature 62 between the pair of magnetic pole pieces 63a and 63b, a position (hereinafter referred to as a start position) Ps that contacts the N-pole magnetic pole piece 63a, and an S-pole magnetic pole. Measurement is performed with respect to a position Pe (hereinafter referred to as an end position) Pe in contact with the piece 63b. That is, when the energizing device 10 energizes the coil 61 of the electromagnet device 6, the armature 62 moves from the start position Ps to the end position Pe, and accordingly, the movable contact 5 comes into contact with the fixed contact 2.

  The characteristic recognizing unit 24 outputs characteristic information (force acting on the movable contact 5) measured by the load cell 22 for a plurality of stroke positions of the amateur 62 (hereinafter referred to as feature points 1, 2,..., N). Here, by measuring the force acting on the movable contact 5 over the entire stroke range of the armature 62, data as shown in FIG.

  In the present embodiment, the characteristic detection device 20 includes a camera (not shown) that captures an image of an area including at least the fixed contact 2 and the movable contact 5 in addition to the force sense measurement unit 21. It has a visual measurement unit 26 that detects characteristic information extracted from an image captured by a camera. The camera of the visual system measurement unit 26 includes the armature 62 and the magnetic pole pieces 63a and 63b in the field of view in addition to the fixed contact 2 and the movable contact 5. Here, the visual measurement unit 26 does not shake even when the movable contact 5 is moving by instantaneously applying a flash to the subject (relay Ry) with the camera shutter opened. A configuration that can obtain an image is adopted.

  The visual system measurement unit 26 extracts edges (contours) of the fixed contact 2, the movable contact 5, the armature 62, the magnetic pole pieces 63 a and 63 b from the captured image, and at least the fixed contact from the result (edge image). The characteristic information including the contact state between 2 and the movable contact 5 is detected. Here, the characteristic information detected by the visual system measurement unit 26 is used for calculation of the amount of overtravel described later, measurement of the distance between the fixed contact 2 and the movable contact 5, and the like, which is relatively high for edge extraction. Accuracy is required. In this embodiment, the corners of each component such as the fixed contact 2 and the movable contact 5 are R-processed. However, an error occurs in the position of the extracted edge by selecting an optimal optical system. Use a difficult structure.

  The arithmetic unit 30 stores the predetermined determination criteria and the like, and the twist amounts of the fixed terminal plate 1 and the movable spring 3 according to the determination criteria using the detection results of the characteristic detection device 20 when the coil 61 is energized. A fixed side calculation unit 32 and a movable side calculation unit 33.

  In the storage unit 31, the contact is turned on when the voltage applied to the coil 61 is equal to or higher than the specified voltage (moving voltage), the contact is turned off when the voltage is lower than the specified voltage (open voltage), and the amount of overtravel (OT) is Characteristic information (hereinafter referred to as non-defective product) detected by a non-defective relay Ry that satisfies the four items of being able to secure a constant contact pressure when the contact is on and that the armature 62 reaches the end position Pe when applying a moving voltage. Information) is stored. The determination criterion in the storage unit 31 is an adjustment amount (fixed terminal plate) required to satisfy the above four items based on a comparison result between the non-defective product information and the characteristic information of the relay Ry actually detected by the characteristic detection device 20. 1 and the amount of torsion of the movable spring 3).

  As shown in FIG. 4, the movable side calculation unit 33 stores the characteristic information (force acting on the movable contact 5) for each of the feature points 1, 2,... N received from the haptic measurement unit 21 in the storage unit 31. A plurality of comparison units 34 for comparing with the non-defective product information, and a torsion amount determination unit 35 for determining the torsion amount of the movable spring 3 in accordance with the determination criteria in the storage unit 31 from the comparison results in the comparison units 34. Here, the comparison unit 34 calculates the minimum value from the force acting on the movable contact 5 measured over the entire range of the stroke of the amateur 62, and calculates the minimum value and the normal operation stored as non-defective product information. Calculate the difference from the minimum required force. Then, the torsion amount determination unit 35 determines the torsion amount of the movable spring 3 from the difference value according to the bending coefficient (bending curve) of the movable spring 3 stored in the storage unit 31 as a determination criterion.

  As another configuration example, the difference value is divided into a plurality of ranks, and the twist amount corresponding to each rank is stored in advance in the storage unit 31 as a determination criterion, and the twist amount determination unit 35 is calculated by the comparison unit 34. The twist amount of the movable spring 3 may be determined from the twist amount corresponding to the rank of the difference value.

  The fixed-side calculation unit 32 compares the distance calculation unit 36 that calculates the overtravel amount using the characteristic information received from the visual system measurement unit 26 and compares the calculated overtravel amount with the non-defective product information in the storage unit 31. Unit 37 and a torsion amount determination unit 38 that determines the torsion amount of the fixed terminal board 1 according to the determination criterion in the storage unit 31 from the comparison result in the comparison unit 37. That is, since the distance between the movable contact 5 and the fixed contact 2 and the movement amount of the armature 62 can be calculated from the characteristic information extracted by the visual system measurement unit 26, after the movable contact 5 contacts the fixed contact 2. It is possible to calculate the amount of overtravel by calculating the amount of movement of the amateur 62. Therefore, by calculating the difference value between the overtravel amount and the overtravel amount stored as non-defective product information in the comparison unit 37, the twist amount determination unit 38 determines the twist amount of the fixed terminal board 1 from the difference value. can do.

  The adjustment device 40 includes a fixed-side adjustment unit 41 that adjusts characteristics by twisting the fixed terminal plate 1 according to the adjustment amount (the twist amount of the fixed terminal plate 1 and the movable spring 3) obtained by the arithmetic device 30, and a movable spring. 3 and a movable side adjusting portion 42 for adjusting characteristics by twisting 3.

  As shown in FIG. 5A, the fixed-side adjustment unit 41 has a direction A in which the fixed contact 2 opens (a direction away from the movable contact 5) A and a direction B in which the fixed contact 2 closes (a direction closer to the movable contact 5) B Both of them have a mechanism for twisting the fixed terminal plate 1. Specifically, the fixed-side adjustment unit 41 has a chuck (not shown) that sandwiches the base portion of the fixed terminal plate 1 erected on the bottom plate of the case, and the fixed terminal by rotating the chuck with a motor. The inclination of the fixed terminal board 1 is adjusted by twisting the board 1. The amount of rotation of the chuck is determined based on the adjustment amount obtained by the arithmetic unit 30 and taking into account the springback that occurs when the fixed terminal plate 1 is twisted.

  As shown in FIG. 5 (b), the movable side adjustment unit 42 has a direction C in which the movable contact 5 opens (a direction away from the fixed contact 2) C and a direction D in which the movable contact 5 closes (a direction toward the fixed contact 2) D. Both have a mechanism for twisting the movable spring 3. Specifically, the movable side adjustment unit 42 has a chuck (not shown) that sandwiches the movable terminal plate 4 to which the base of the movable spring 3 is fixed, and the movable terminal plate is rotated by rotating the chuck with a motor. 4 is twisted to change the angle of the movable terminal plate 4 and the angle of the movable spring 3 is changed. Note that the amount of rotation of the chuck is determined on the basis of the adjustment amount obtained by the arithmetic unit 30 and considering the spring back that occurs when the movable spring 3 (movable terminal plate 4) is twisted.

  Thus, in the present embodiment, the movable spring 3 is adjusted using the characteristic information measured by the haptic measurement unit 21, and the fixed terminal board 1 is adjusted using the characteristic information measured by the visual system measurement unit 26. Will be. Here, by adjusting the movable spring 3, the balance between the restoring force Fa of the movable spring 3 and the attractive force Fb of the electromagnet device 6 can be adjusted. As a result, the voltage applied to the coil 61 is specified. The characteristics of the relay Ry can be adjusted so that the contact is turned on at a voltage (impressive voltage) or higher and the contact is turned off at a specified voltage (open voltage) or lower. On the other hand, the amount of overtravel can be adjusted by adjusting the fixed terminal plate 1, so the characteristics of the relay Ry can be adjusted to optimize the overtravel amount and ensure a constant contact pressure when the contact is on. is there.

  Furthermore, since the positional relationship between the armature 62 and the magnetic pole pieces 63a and 63b can be detected from the image obtained by the visual system measurement unit 26, the distance between the armature 62 and the magnetic pole piece 63b is measured from the image when the moving voltage is applied. Then, it is also possible to determine whether or not the amateur 62 has reached the end position Pe (whether or not a two-step operation is performed).

  Although not shown in FIG. 2, the characteristic adjustment system of the present embodiment includes a confirmation unit for confirming that the relay Ry is operating normally after the adjustment of the movable spring 3 and the fixed terminal plate 1 is completed. Is provided. The confirmation means has a configuration for detecting an on / off state of the contact while applying a confirmation voltage from the energization device 10 to the coil 61 of the relay Ry. The on / off state of the contact may be detected using images of the fixed contact 2 and the movable contact 5 obtained by the visual measurement unit 26, or a circuit for detecting a conduction state between the fixed contact 2 and the movable contact 5 may be used. May be used.

  As shown in FIG. 6, the confirmation voltage applied at this time is the lower limit value V1L of the permissible range of the moving voltage (the voltage at which the contact is turned on), the upper limit value V1H of the permissible range of the moving voltage, the rated voltage V0, the open circuit voltage ( The upper limit value V2H of the permissible range of the voltage at which the contact is turned off and the lower limit value V2L of the permissible range of the open-circuit voltage are changed stepwise with time. Here, as an example, 70% of the rated voltage V0 is the upper limit value V1H of the permissible voltage range, and 10% of the rated voltage V0 is the lower limit value V2L of the permissible range of the open circuit voltage.

  Here, if the relay Ry is normal, the voltage at which the contact is turned on is within the permissible voltage range (V1L to L1H), and the voltage at which the contact is turned off is within the permissible range of the open voltage (V2L to L2H). There will be. Therefore, when the applied voltage to the coil is changed as described above, the contact is off during the period of applied voltage = V1L, the contact is on during the period of applied voltage = V1H, and the contact is on during the period of applied voltage = V0. The contact is on during the period of applied voltage = V2H, and the contact is off during the period of applied voltage = V2L. Using this contact on / off pattern as a normal pattern, the confirmation means determines that the relay is operating normally if the contact on / off pattern matches the normal pattern, and determines that the contact is not operating normally if the pattern does not match. To do.

  Next, a relay characteristic adjustment method using the above-described relay characteristic adjustment system will be described with reference to the flowchart of FIG.

  First, the coil 61 of the relay Ry is energized by applying a measurement voltage from the energization device 10 (energization process S1). The measurement voltage used here is a predetermined voltage obtained in advance from experimental results.

  The haptic measurement unit 21 measures the force acting on the card 7 portion in a state where the measurement voltage is applied to the coil 61 (force measurement process S11). Then, the movable side calculation unit 33 compares the characteristic information received from the haptic system measurement unit 21 with the non-defective product information (S12), and the twist of the movable spring 3 is determined from the comparison result (difference value) according to the determination criterion. The amount is determined (calculation step S13). Thereafter, the movable side adjustment unit 42 adjusts the relay characteristics by twisting the movable spring 3 based on the twist amount obtained in the calculation step S13 (S14).

  On the other hand, the visual system measurement unit 26 captures an image including the fixed contact 2, the movable contact 5, the armature 62, and the magnetic pole pieces 63a and 63b with the camera in a state where the measurement voltage is applied to the coil 61 (S21). Then, the fixed side calculation unit 32 compares the characteristic information received from the visual system measurement unit 26 with the non-defective product information (S22), and based on the comparison result (difference value), the fixed terminal board 1 is twisted according to the criterion. The amount is determined (S23). Thereafter, the fixed-side adjusting unit 41 adjusts the relay characteristics by twisting the fixed terminal board 1 based on the twist amount obtained in step S23 (S24).

  When the adjustment of the movable spring 3 and the fixed terminal plate 1 is completed, a confirmation voltage is applied from the energizing device 10 to the coil 61 (S2). At this time, it is determined whether or not the relay Ry is operating normally from the ON / OFF pattern of the contact (S3). If the relay Ry is operating normally, the characteristic adjustment for the relay Ry is terminated, and if it is not operating normally. Then, returning to the energization process in step S1, the characteristic adjustment for the relay Ry is performed again. As a result, the characteristic adjustment is repeated for the relay Ry until it is confirmed that the relay Ry operates normally.

  By using the relay characteristic adjustment system having the above-described configuration, specifically, characteristic adjustment as described below can be performed. In the following, it is assumed that 70% of the rated voltage V0 is defined as the upper limit value V1H of the allowable range of the moving voltage and 10% of the rated voltage V0 is defined as the lower limit value V2L of the allowable range of the open voltage as described above.

  That is, the voltage applied to the coil 61 is 100% of the rated voltage ("A" in the figure), 70% ("B" in the figure), 40% ("C" in the figure), 10% (" If the relay Ry is a non-defective product when it is gradually changed to “d”) and 0% (“e” in the figure), the haptic measurement unit 21 can obtain characteristic information as shown in FIG. . Here, the horizontal axis is the stroke (unit: mm), the vertical axis is the force (unit: mN), the force acting on the movable contact 5 in the direction of closing the contact is positive, and the force is applied in the direction of opening the contact. Force is negative. The stroke of the armature 62 is 0 mm at the end position Pe, and the stroke increases as the armature 62 approaches the start position Ps.

  That is, when the upper limit value V1H (70% of the rated voltage V0) of the allowable range of the moving voltage is applied to the coil 61, the normal relay Ry has a contact with the movable contact 5 in the entire range of the stroke of the armature 62. Since a force (positive force) of at least about 70 mN acts in the closing direction, a normal operation of contact ON is performed. Therefore, the non-defective product information is stored in the storage unit 31 with the minimum force required for normal operation of contact ON being 70 mN. In addition, when the lower limit value V2L (10% of the rated voltage V0) of the allowable range of the open voltage is applied to the coil 61, the normal relay Ry has a contact with the movable contact 5 over the entire range of the armature 62 stroke. Since a force in the direction of opening (negative force) acts, the normal operation of contact-off is performed.

  On the other hand, when the haptic measurement unit 21 obtains characteristic information as shown in FIG. 9 when the upper limit value V1H (70% of the rated voltage V0) of the permissible voltage range is applied to the coil 61, the relay Ry can be determined to be abnormal. That is, in this case, in the relay Ry, the armature 62 is in the vicinity of the start position Ps, and even when a voltage is applied to the coil 61, a force (positive force) in the direction of closing the contact acts on the movable contact 5. This causes an abnormality that the contact does not turn on. This abnormality is considered to be caused by the large restoring force Fa of the movable spring 3, and is thus eliminated by twisting the movable spring 3 in a direction that weakens the restoring force Fa of the movable spring 3 (direction D in which the movable contact 5 closes). be able to.

  Therefore, when the characteristic information as shown in FIG. 9 is obtained, the movable side calculation unit 33 sets the minimum value in FIG. 9 to the minimum necessary for normal operation of contact ON stored as good product information. Compared with the magnitude of the force (70 mN), the amount of torsion of the movable spring 3 is determined based on the difference, and the movable side adjustment unit 42 moves the movable spring 3 in the direction D in which the movable contact is closed based on the amount of torsion. Adjust characteristics by twisting. As a result, when the upper limit value V1H of the permissible voltage range (70% of the rated voltage V0) is applied to the coil 61, the characteristic information obtained by the haptic measurement unit 21 changes as shown in FIG. As a result, the relay Ry is determined to be non-defective.

  Here, the relay Ry targeted in the present embodiment includes two sets of the movable contact 5 and the fixed contact 2 as shown in FIG. 13, but the timing when both the movable contacts 5 contact the fixed contact 2 respectively. Do not have to match exactly. In the example of FIG. 10, as the armature 62 swings, first, one movable contact 5 comes into contact with the fixed contact 2 (H1 in the figure), and then the other movable contact 5 comes into contact with the fixed contact 2 (see FIG. 10). Middle H2), and finally, the armature 62 is in contact with the magnetic pole piece 63b (H3 in the figure).

  Since the movement of the force acting on the movable contact 5 changes as the movable contact 5 contacts the fixed contact 2 or the armature 62 contacts the magnetic pole piece 63b in this way, It is also possible to detect the on / off state of the contact and the state of the amateur 62. As a result, the overtravel amount can also be calculated using the characteristic information obtained by the haptic measurement unit 21 instead of the characteristic information obtained by the visual measurement unit 26, and the visual measurement unit 26 Can be omitted.

  According to the relay characteristic adjustment system described above, the force sense measuring unit 21 of the characteristic detection device 20 can also quantitatively measure the invisible requirement of the force acting on the movable contact 5. Then, the characteristic information obtained by the characteristic detection device 20 is compared with non-defective product information, and the adjustment amount (the amount of twist of the fixed terminal plate 1 and the movable spring 3) is determined from the comparison result. It is possible to automate the adjustment of characteristics with the same accuracy as a highly skilled worker.

(Embodiment 2)
The relay characteristic adjustment system according to the present embodiment adds an electrical measurement unit (not shown) that detects the electrical connection state between the fixed contact 2 and the movable contact 5 as characteristic information to the characteristic detection device 20, and the arithmetic device 30. However, it differs from the relay characteristic adjustment system of the first embodiment in that the adjustment amount (the twist amount of the fixed terminal plate 1 and the movable spring 3) is determined in consideration of the detection result of the electric system measurement unit.

  The electrical measuring unit is electrically connected to each of the fixed terminal plate 1 connected to the fixed contact 2 and the movable terminal plate 4 connected to the movable contact 5 via the movable spring 3. -The electrical connection state (contact ON / OFF state) between the fixed contact 2 and the movable contact 5 is detected by detecting the conduction state between the movable terminal plates 4. Specifically, as in the example of FIG. 6 described in the first embodiment, the voltage applied from the energization device 10 to the coil 61 is the lower limit value V1L of the allowable range of the moving voltage (the voltage at which the contact is turned on). The upper limit value V1H of the permissible voltage range, the rated voltage V0, the upper limit value V2H of the open circuit voltage (the voltage at which the contact is turned off), and the lower limit value V2L of the open circuit voltage range, stepwise over time. The contact ON / OFF state is detected while changing to.

  That is, if the relay Ry is normal, the contact is off during the period of applied voltage = V1L, the contact is on during the period of applied voltage = V1H, the contact is on during the period of applied voltage = V0, and the period of applied voltage = V2H. Is contact ON, and contact OFF is applied during the period of applied voltage = V2L. Hereinafter, such a contact ON / OFF pattern is a normal pattern ("Normal" in Table 1).

  On the other hand, if the contact ON / OFF pattern does not match the normal pattern, it is determined that the relay Ry is not operating normally. Then, as shown in “Abnormality 1” to “Abnormality 6” in Table 1, from the on / off pattern of the contact when the abnormality is detected (the abnormal portion is in the thick frame in Table 1), the cause of the abnormality and the abnormality It is possible to predict an adjustment method for solving the problem. For example, in the case of “abnormality 1”, when the measurement result that the contact is off is obtained in the period of applied voltage = V1H and the period of applied voltage = V2H to be in contact, the restoring force Fb of the movable spring 3 is Since it is large, it is considered that the abnormality can be solved by twisting the movable spring in the direction in which the restoring force of the movable spring 3 is weakened (direction D in which the movable contact is closed).

そこで、演算装置３０は、判定基準として表１のようなテーブルを記憶部３１に記憶し、電気系計測部で計測された接点のオンオフのパターンをテーブルと照合することにより、固定端子板１および可動ばね３をどの向きに捻ればよいのかを判断することができる。捻り量に関しては、実施形態１で説明したように、可動側算出部３３および固定側算出部３２にて求めることができる。

Therefore, the arithmetic unit 30 stores a table as shown in Table 1 as a determination criterion in the storage unit 31, and collates the contact on / off pattern measured by the electrical system measurement unit with the table, thereby fixing the fixed terminal board 1 and It is possible to determine in which direction the movable spring 3 should be twisted. The twist amount can be obtained by the movable side calculation unit 33 and the fixed side calculation unit 32 as described in the first embodiment.

  According to the configuration described above, the electrical system measurement unit can more reliably change the contact on / off state than when the contact measurement state is detected from the measurement results of the haptic measurement unit 21 and the visual system measurement unit 26. It becomes possible to detect, and the measurement accuracy of the overstroke amount is improved. Therefore, the accuracy of characteristic adjustment can be improved as compared with the case where the adjustment amount is obtained only from the measurement results of the haptic measurement unit 21 and the visual measurement unit 26.

  Other configurations and functions are the same as those of the first embodiment.

(Embodiment 3)
The relay characteristic adjustment system according to the present embodiment is characterized in that the contact state between the fixed contact 2 and the movable contact 5 is determined in more detail using the characteristic information obtained by the visual system measurement unit 26. This is different from the relay characteristic adjustment system.

  In the present embodiment, in the arithmetic unit 30, as shown in FIG. 11, the straight line La formed by the edge on the movable contact 5 side of the movable spring 3, and the straight lines Lb and Lc formed by the edge of the fixed terminal plate 1 on the fixed contact 2 side. From the relationship, the contact state of the fixed contact 2 and the movable contact 5 is determined. For example, when the movable contact 5 is in contact with the fixed contact 2 while the movable contact 5 is inclined, the contact area between the fixed contact 2 and the movable contact 5 is small and the resistance between the contacts is large. It is desirable to determine that the relay Ry in which the error occurs is abnormal.

  Here, the fixed terminal plate 1 erected on the bottom surface of the case has a main piece 1a provided with a fixed contact 2 as shown in FIG. 12A, and a height from the case bottom surface of the main piece 1a. The lower side piece 1b is L-shaped. Since the visual system measurement unit 26 captures an image from the arrow X side (upper side) in FIG. 12A, the edge of the front end surface of the main piece 1a (the straight line Lc) and the side piece on the image. The edge (the straight line Lb) of the front end face of 1b appears separately. Therefore, if the fixed terminal plate 1 is perpendicular to the bottom surface of the case, the straight lines Lb and Lc are aligned on a straight line as shown in FIG. On the other hand, when the fixed terminal plate 1 is inclined with respect to the bottom surface of the case, a deviation occurs in the thickness direction of the fixed terminal plate 1 between the straight line Lb and the straight line Lc as shown in FIG.

  The arithmetic unit 30 calculates between the straight lines Lb and Lc for each predetermined reference measurement position set on the straight line La from an image captured in a state where the upper limit value V1H of the permissible voltage range is applied to the coil 61. The distances d1 to d5 are obtained, and if the average value of the distances d1 to d5 is equal to or greater than the threshold value, it is determined that the movable contact 5 and the fixed contact 2 are separated (that is, the contact is off). Further, if the angle formed between the straight line La and the straight line Lb is equal to or greater than the threshold value, the angle formed between the movable contact 5 and the fixed contact 2 is considered to be large. It is determined that Furthermore, when the distance between the straight lines Lb and Lc in the thickness direction of the fixed terminal plate 1 is equal to or greater than the threshold value, the fixed contact plate 1 is greatly inclined with respect to the bottom of the case. Therefore, it is determined that the movable contact 5 is in a one-sided state with respect to the fixed contact 2.

  According to the configuration described above, since the contact state between the fixed contact 2 and the movable contact 5 such as presence / absence of contact can be determined in detail, there is an advantage that the reliability of the relay Ry after characteristic adjustment is improved. .

  Other configurations and functions are the same as those of the first embodiment.

  By the way, in each said embodiment, each measurement result of the haptic system measurement part 21 and the visual system measurement part 26 is each separately determined for the determination of the twist amount of the movable spring 3, and the determination of the twist amount of the fixed terminal board 1. Although the example of using was shown, it is not restricted to this example, You may make it determine the torsion amount of the movable spring 3 and the fixed terminal board 1 by combining both measurement results. In this case, a determination criterion using both measurement results as parameters is adopted so that the adjustment amount can be determined from both measurement results of the haptic measurement unit 21 and the visual measurement unit 26. Furthermore, the adjustment amount may be determined by combining the measurement results of the electric system measurement unit.

DESCRIPTION OF SYMBOLS 1 Fixed terminal board 2 Fixed contact 3 Movable spring 5 Movable contact 6 Electromagnet apparatus 7 Card 10 Current supply apparatus 20 Characteristic detection apparatus 21 Haptic system measurement part 22 Load cell 26 Visual system measurement part 30 Arithmetic apparatus 40 Adjustment apparatus 61 Coil Fa Restoring force Fb Suction force Ry relay

Claims (4)

Moving and detachably fixed contacts and the movable contact with one another, a fixed terminal board for holding said stationary contact, a movable spring for movably holding the movable contact within the specified range, the movable contact upon energization of the coil targeting relay with an electromagnet device for generating a magnetic force so as to, a relay characteristic adjustment system used to adjust the characteristics to be performed by twisting at least one of said movable spring and the fixed terminal plate,
Energizing device that performs energization of the coil, the characteristic detector for detecting characteristic information of the relay in question, using the detection result of said characteristic detection device at the time of energization of the coil, determining a predetermined and an arithmetic unit for determining the amount of twist of the fixed terminal plate and the movable spring according to the criteria,
The characteristic detection apparatus, and Force-based measuring unit for measuring the force acting on the movable contact from said movable spring and the electromagnet apparatus as the characteristic information, the electrical connection state of the fixed contact and the movable contact characteristics The relay characteristic adjustment system characterized by including the electrical measurement part detected as information . Visual wherein the characteristic detection device comprises a camera for capturing an image of the including the fixed contact and the movable contact region, for detecting the state of contact between at least the fixed contact and the movable contact from the image as the characteristic information The relay characteristic adjustment system according to claim 1, further comprising a system measurement unit. The relay characteristic adjustment system according to claim 1 , further comprising an adjustment device that twists at least one of the fixed terminal plate and the movable spring by an amount of twist obtained by the arithmetic device . A fixed contact and a movable contact that can be brought into and out of contact with each other, a fixed terminal plate that holds the fixed contact, a movable spring that holds the movable contact within a specified range, and the movable contact that moves when the coil is energized A relay characteristic adjusting method used for adjusting a characteristic that is performed by twisting at least one of the fixed terminal plate and the movable spring for a relay including an electromagnet device that generates a magnetic force so as to perform,
Using the energization process for energizing the coil, the characteristic detection process for detecting the characteristic information of the target relay, and the detection result of the characteristic detection process when energizing the coil, a predetermined determination is made. A calculation process for determining the amount of twist of the fixed terminal plate and the movable spring according to a standard,
The characteristic detection process includes a force measurement process for measuring a force acting on the movable contact from the movable spring and the electromagnet device as the characteristic information, and an electrical connection state of the fixed contact and the movable contact as the characteristic information. A method for adjusting relay characteristics, comprising: a detecting process.

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