JP4884289B2 - Inspection device for feeding grip in vertical transport type continuous plating equipment - Google Patents

Description

  The present invention relates to a power feeding grip inspection apparatus in a vertical conveyance type continuous plating apparatus, which detects an energization failure of a power feeding grip that holds a workpiece in the vertical conveyance type continuous plating apparatus.

  For plating of a flat workpiece such as a printed circuit board, a vertical conveyance type continuous plating apparatus that continuously transfers the workpiece while holding the workpiece in a vertical posture is often used. In the vertical transfer type continuous plating equipment, a power supply grip that supplies power while holding the upper end of the work is used, but this power supply grip has a certain holding force to hold the work so that it does not slip or fall off during transfer. At the same time, sufficient power supply capability is required. As a power supply grip for a flat workpiece having sufficient holding force and power supply capability, a grip as shown in Patent Document 1 has been put to practical use, and plating of a long sheet-like work can be performed using this power supply grip. A long sheet plating apparatus as shown in Patent Document 2 is put into practical use.

  What is shown in this patent document 1 is to hold and hold a plate-like workpiece between a workpiece holding leaf spring and a feeding plate spring and a base plate, which are made of different materials. It is movably attached to the rail, and is configured to take in the electric power supplied to the rail with a current collecting brush. According to this power feeding grip, the flat work is held by the work holding leaf spring made of a material having a large spring constant, and power is fed through the power feeding leaf spring made of a material having good conductivity. Is securely held and sufficient power is supplied.

  Also, Patent Document 2 shows that a conveying device that conveys a power feeding grip that sandwiches the upper end of the workpiece and feeds power is provided. Synchronized with speed. In the conventional plating equipment that feeds power to the work with the power supply roll provided before and after the plating tank, the current density is large at both ends of the plating tank close to the power supply roll and the central part of the plating tank far from the power supply roll due to the electrical resistance of the work. It was different. According to this long sheet plating apparatus, power is supplied to the work from the power supply grip that holds the upper end of the work, so that the current density does not vary in the longitudinal direction of the work.

  Such a power supply grip takes in the electric power currently supplied to the rail with the current collection brush which contacts a rail, and a current collection brush will slide on a rail with the movement of a power supply grip. For this reason, it is inevitable that the current collecting brush slides, and it may be deformed or the pressing force may be reduced. A plating failure such as a plating film thickness distribution failure occurs. In order to avoid the occurrence of defective plating immediately even if the current collecting brush becomes defective due to abnormalities such as wear or deformation, each power supply grip is usually provided with a plurality of current collecting brushes, and the work It is also carried out with a feeding grip.

  When a plurality of current collecting brushes are provided on the power supply grip, power can be taken in by the remaining current collecting brushes even if some of the current collecting brushes do not function. Absent. In addition, when the work is sandwiched between multiple power supply grips, the work is fed from the remaining power supply grips even if power supply failure occurs in some power supply grips. Depending on the number and distribution, a plating failure does not occur immediately, and a plating failure occurs only when an energization failure occurs in a plurality of power feeding grips.

  In order to avoid the occurrence of plating defects, it is necessary to maintain the power feeding grip in a normal state. However, since a large number of power feeding grips are used in the vertical conveyance type continuous plating equipment, it takes a lot of time. There is almost no maintenance, and power feeding grips are inspected and repaired only after plating defects occur. For this reason, the occurrence of defective plating is unavoidable, and the plating apparatus must be stopped each time, and there is a problem that it takes time to identify the power feeding grip that has become poorly energized. For such a problem, if an inspection device for inspecting the energization state of the power feeding grip is provided during the operation of the plating apparatus, the power feeding grip in which the power feeding failure is detected can be replaced at a position where the power feeding grip does not hold the workpiece. Is convenient. Although there are few apparatuses that perform an energization inspection in a plating apparatus, an apparatus that is disclosed in Patent Document 3, for example, is known as an apparatus that performs an energization inspection of a plating jig.

This Patent Document 1 is connected to a power feeding unit, a current-carrying plate connected to the power-feeding unit, and a conductive layer formed on an upper surface of a target object to be plated, In a plating jig energization inspection device for confirming energization of a plating jig having a plurality of energizers that can be contacted and separated from the plate, first energization inspection means for inspecting energization between the power feeding portion and the energizing plate. And a second energization inspection means for inspecting the energization between the power supply unit and the energization body, and a third energization inspection means for inspecting the energization between the energization bodies. However, such a configuration cannot be applied to a power feeding grip having a sliding portion such as a current collecting brush, and an apparatus for inspecting the energized state of such a power feeding grip has not been put into practical use.
JP 2003-221699 A JP 2006-193794 A Japanese Patent Laid-Open No. 2005-2407

  The present invention has been made to solve the above-described problems and to provide a power feeding grip inspection device in a vertical conveyance type continuous plating apparatus that inspects the power supply state of the power feeding grip while the power feeding grip is moving.

  In order to solve the above problems, the inspection device for the power feeding grip in the vertical conveyance type continuous plating apparatus of the present invention is a large number of power feeding grips each having a plurality of current collecting brushes driven by a driving chain and supported by rails. Is an inspection device for feeding grips in a vertical conveyance type continuous plating apparatus that can inspect the energization state of the feeding grips of a vertical conveyance type continuous plating apparatus that moves. The power feeders are arranged side by side in the direction of movement of the power feeding grip so that the interval between the power feeders for inspection is the same as the interval between the current collecting brushes and insulates each other and the other part of the rail. A sensor for detecting the power supply grip is provided at a position where the power supply grip moves and the leading current collecting brush contacts the power supply for inspection on the front side. When the sensor detects the voltage between the power supply unit that sends a constant current between the two inspection power supply units and the two power supply units for inspection, the signal is sent when the voltage exceeds the set value. An output voltage relay is provided.

  Here, one or more sensors for detecting the power feeding grip are provided in front of the direction of movement of the power feeding grip of the sensor for detecting the power feeding grip at the position where the leading current collecting brush contacts the power feeding portion for inspection on the front side. The intervals between the sensors can be the same as the intervals between the current collecting brushes, and when each sensor detects the power supply device, a constant current can flow between the two power supply units for inspection.

  According to the present invention, the sensor for detecting the power feeding grip is provided at a position where the power feeding grip moves and the leading current collecting brush contacts the front power feeding unit for inspection. Since a constant current flows between the power supply units, the voltage between the two inspection power supply units is measured, and when the voltage exceeds the set value, the voltage relay outputs a signal. If the current-carrying state of one of the two current collector brushes that are in contact with the two power supply units for inspection is bad, the voltage drop will increase, and the voltage relay will output a signal, causing the current collector brush to have a current failure. Can be detected.

  When sensors for detecting one or more power feeding grips are provided in front of the power feeding grip of the sensor, the second or third current collecting brush is used for the inspection power feeding on the front side. The feeding grip is detected at the position in contact with the part. When each sensor detects the second or third current collecting brush, a constant current is passed between the two inspection power supply units, the voltage between the two inspection power supply units is measured, and the voltage is measured. Since the voltage relay outputs a signal when the value exceeds the set value, the second and third or third and fourth current collecting brushes in contact with the two inspection power supply units at that time If any one of the energization states is bad, the voltage drop becomes large, and the voltage relay outputs a signal, so that the energization failure of three or four current collecting brushes can be detected.

  In this way, since the power supply grip can be inspected for the current-carrying state while the power-supply grip passes through the inspection position, there is an advantage that no special effort is required to find a power-supply grip with poor power supply. The subject of the present invention is a power feeding grip in which two or more current collecting brushes are arranged in the moving direction of the power feeding grip. However, when two or more current collecting brushes are provided in the power feeding grip, some Even if the current collecting brush is not energized, all other current collecting brushes are not simultaneously energized. Therefore, since power can be taken in by a sound current collecting brush, it is not necessary to stop the use immediately, and the plating process can be continued. Record the number of the power supply grip in which a power failure has been detected, and replace it properly when the power supply grip does not clamp the workpiece while the plating device is in operation. You can also As a result, the power feeding grip can be replaced before all of the plurality of current collecting brushes become energized, so there is an advantage that no plating failure occurs.

Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
1 and 2 show a configuration of a power feeding grip inspection device in the vertical conveyance type continuous plating apparatus of the present invention, and a position detection sensor for detecting the position of the power feeding grip is provided in the vicinity of the power feeding grip inspection position. An inspection power supply unit is provided on the rail at the inspection position. FIG. 3 shows the configuration of the main part showing an example of the vertical conveyance type continuous plating apparatus, and FIGS. 4 to 6 show the configuration of an example of the power supply grip with the power supply grip supported by the rail. Will be described.

  In the vertical conveying type continuous plating apparatus, a large number of power feeding grips 1, 1 are supported by a rail 2, and a plurality of power feeding grips 1, 1 are driven and moved by a drive chain 3 provided in parallel with the rail 2. is there. The power feeding grip 1 shown in the figure is configured by providing leaf spring support bases 5 and 5 on a base plate 4 and supporting the leaf spring mounting plates 6 on the leaf spring support bases 5 and 5 in a swingable manner. The plate spring mounting plate 6 includes a pair of power supply plate springs 7 and workpiece holding plate springs 8 and 8 arranged on both sides thereof, and the upper ends thereof are fixed to each other. One end of an opening spring 9 that is in contact with and supported by the base plate 4 is attached, and the lower end of the power feeding plate spring 7 is biased away from the base plate 4.

  The power supply leaf spring 7 is made of a material having high conductivity, and the work holding leaf spring 8 is made of a material having a large spring constant. Anti-slip protrusions 10 and 10 made of a material such as rubber are attached to the lower surfaces of the workpiece holding leaf springs 8 and 8 on the surface in contact with the workpiece. A presser fitting 11 is attached to the center of the power supply leaf spring 7, and a pressure rod 12 is provided on the presser fitting 11 in parallel with the surface of the power supply leaf spring 7. Both ends of the pressure rod 12 are extended to the front surfaces of the work holding plate springs 8 and 8 and the work holding plate springs 8 and 8 are simultaneously pushed backward when the presser fitting 11 is pushed backward. A front end of a hook 13 penetrating the power supply leaf spring 7 and the base plate 4 is pivotally attached to the pressure rod 12. The hook 13 has a lower surface engaging portion 14 on the lower surface of the central portion and an upper surface of the rear portion. Upper surface engaging portions 15 are provided respectively. A hook receiver 16 is provided on the back surface of the base plate 4.

  In addition, the base plate 4 has the rails 2 sandwiched from above and below, and rollers 17, 17, 18, and 18 that are rotatable about a horizontal axis perpendicular to the base plate 4, and the front lower portion of the rail 2 and the rail 2. Rollers 19 and rollers 20 and 20 that are in contact with the upper part of the back surface and are rotatable about a vertical axis parallel to the base plate 4 are provided on the rail 2 so that the power feeding grip 1 can move smoothly. A current collecting brush 21 is provided at a position in contact with the upper front portion of the rail 2 so that the power supplied to the rail 2 is taken into the base plate 4. The current collecting brush 21 is formed by forming a leaf spring. In the illustrated example, three current collecting brushes 21 a, 21 b, and 21 c are arranged at regular intervals from the front in the moving direction of the power feeding grip 1.

  When the power supply grip 1 configured as described above is opened, the lower ends of the power supply plate spring 7 and the work holding plate springs 8 and 8 are separated from the base plate 4 by the elastic force of the release spring 9. Hold. At this time, excessive opening is restricted by the upper surface engaging portion 15 of the hook 13. When the presser foot 11 is pushed backward, the power supply plate spring 7 and the work holding plate springs 8 and 8 swing together with the plate spring mounting plate 6, and the power supply plate spring 7 and the work holding plate springs 8 and 8 are bent. The upper end of the workpiece is held between the lower end and the base plate 4. The lower surface engaging portion 14 of the hook 13 is engaged with the hook receiver 16 to maintain the state of holding the workpiece, and is restored by operating the hook 13 to release the engagement between the lower surface engaging portion 14 and the hook receiver 16.

  A driven rod 22 is provided on the upper portion of the base plate 4 so as to project rearward. The driven rod 22 is engaged with a drive rod 23 protruding upward from the top of the drive chain 3. As a result, when the drive chain 3 moves and the drive rod 23 moves, the driven rod 22 is pushed and the power feeding grip 1 moves. Although not shown in the drawing, the rail 2 is provided in an oval shape as in the case of the conventional vertical conveyance type continuous plating apparatus, and a large number of feeding grips 1 and 1 are driven along the rail 2 so as to be stretched inside the rail 2. As the chain 3 moves, it moves and circulates all at once. The treatment tank is disposed below the rail 2 as in the conventional case.

  Two inspection power supply portions 24 a and 24 b are arranged side by side from the front side in the movement direction of the power supply grip 1 at the inspection position portion of the rail 2 for inspecting the power supply grip 1. The intervals between the inspection power feeding portions 24a and 24b are the same as those of the current collecting brush 21. The insulating members 25 and 25 insulate the rails 2 from each other. In addition, the inspection power feeding portions 24 a and 24 b and the insulating material 25 have the same cross-sectional shape as the other portions of the rail 2. The inspection power supply units 24 a and 24 b are each connected to the output terminal of a DC power supply device that is the power supply device 26, and are simultaneously connected to the input terminal of the voltage relay 27. The voltage relay 27 measures the voltage between the inspection power supply units 24a and 24b and outputs a signal when the voltage exceeds a set value. In the figure, 28 is a protective resistor provided at the input of the voltage relay 27. This inspection position is other than a tank in which energization such as electrolysis is performed, and is preferably set at the head of a processing step in which no workpiece is sandwiched. The current in this apparatus may be a DC power supply or an AC power supply.

  The plating apparatus main body is provided with a first sensor 29 and a second sensor 30 from the rear side in the moving direction of the power feeding grip 1. The first sensor 29 and the second sensor 30 detect the front edge of the power feeding grip 1, and the interval thereof is the same as that of the current collecting brush 21. The first sensor 29 is provided at a position where the leading edge of the power supply grip 1 is detected when the power supply grip 1 moves to a position where the leading current collecting brush 21a contacts the front-side inspection power supply unit 24a. The second sensor 30 detects the front edge of the power supply grip 1 when the power supply grip 1 moves to a position where the second current collecting brush 21b contacts the front inspection power supply unit 24a. The power supply device 26 is controlled at a constant current, and is operated for a predetermined time when the first sensor 29 or the second sensor 30 detects the power feeding grip 1.

  In such a configuration, as in the conventional vertical conveyance type continuous plating apparatus, a large number of power feeding grips 1, 1 are driven and moved by the drive chain 3, and the workpieces sandwiched between the power feeding grips 1, 1 are sequentially transferred to the processing tank. It is immersed and a predetermined plating process is performed. As shown in FIG. 1, when the feeding grip 1 moves and reaches the position where the leading current collecting brush 21 a comes into contact with the front-side inspection feeding unit 24 a, the first sensor 29 detects the front edge of the feeding grip 1. Then, the power supply device 26 is operated to supply a constant current between the inspection power supply unit 24a and the inspection power supply unit 24b. This current flows through the path of the inspection power supply unit 24a, the current collecting brush 21a, the base plate 4, the current collection brush 21b, and the inspection power supply unit 24b.

  At this time, if either the current collecting brush 21a or the current collecting brush 21b is not energized, the voltage drop between the current collecting brush 21a and the current collecting brush 21b increases. If the voltage is equal to or higher than a predetermined value, the voltage relay 27 outputs a detection signal. To do. As a result, it is possible to detect that either the current collecting brush 21a or the current collecting brush 21b is poorly energized. The power supply device 26 stops after a certain time after the completion of the inspection, but the power supply grip 1 continues to move, and the second current collecting brush 21b contacts the front inspection power supply unit 24a as shown in FIG. When reaching the position, the second sensor 30 detects the front edge of the power feeding grip 1. When the second sensor 30 detects the power supply grip 1, the power supply device 26 is operated, and a current flows through the path of the inspection power supply unit 24a, the current collecting brush 21b, the base plate 4, the current collection brush 21c, and the inspection power supply unit 24b. .

  If either the current collecting brush 21b or the current collecting brush 21c is not energized, the voltage relay 27 similarly outputs a detection signal. Thus, the three current collecting brushes 21a, 21b, and 21c are inspected by performing the measurement twice. When there are two current collecting brushes 21, it is possible to detect an energization failure with a single measurement. In the case where the number of current collecting brushes 21 is four, by providing a sensor in front of the second sensor 30, four current collecting brushes can be inspected by measuring three times in the same manner. . Even more rarely, even when there are five or more current collecting brushes 21, the inspection can be performed by measuring the number of times one less than the number of current collecting brushes 21 by providing a sensor.

  As apparent from the above description, any of the current collecting brushes 21a, 21b, and 21c can reliably detect the poorly energized power supply grip 1 while the power supply grip 1 is moving. There is an advantage that no special effort is required to find 1. In the above-described embodiment, the inspection power feeding portions 24a and 24b are provided so as to replace a part of the rail 2 with the same cross-sectional shape as the other portions of the rail 2, but only the surface with which the current collecting brush 21 contacts. It is also possible to provide it.

  When a current-carrying failure of the power supply grip 1 is detected, even if any one of the current collecting brushes 21a, 21b, 21c is a current-carrying failure, the other current-collecting brushes 21 do not all have a current-carrying failure at the same time. Since the power can be taken in by the sound current collecting brush 21, the plating process can be continued. The power supply grip 1 in which an energization failure has been detected records its number, and can be replaced as appropriate when the power supply grip 1 is not sandwiching a workpiece during operation of the plating apparatus. Can also be exchanged. As a result, the power supply grip 1 can be replaced before all of the plurality of current collecting brushes 21 are poorly energized.

It is a connection diagram showing an embodiment of the present invention. It is a connection diagram which shows the state which the electric power feeding grip moved. It is a top view of the principal part which shows the example of a vertical conveyance type continuous plating apparatus. It is a front view which shows an example of an electric power feeding grip. It is a side view which shows an example of an electric power feeding grip. It is a top view which shows an example of an electric power feeding grip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Feeding grip 2 Rail 3 Drive chain 4 Base plate 5 Leaf spring support base 6 Leaf spring mounting plate 7 Feeding leaf spring 8 Work holding leaf spring 9 Release spring 10 Non-slip protrusion 11 Holding metal 12 Pressure rod 13 Hook 14 Lower surface engaging portion 15 Upper surface engaging portion 16 Hook receiver 17, 18, 19, 20 Roller 21, 21a, 21b, 21c Current collecting brush 22 Drive rod 23 Drive rod 24a, 24b Inspection power feeding portion 25 Insulating material 26 Power supply device 27 Voltage relay 28 Protection resistor 29 First sensor 30 Second sensor

Claims (2)

In a vertical conveyance type continuous plating apparatus for inspecting the energization state of a power supply grip of a vertical conveyance type continuous plating apparatus in which a large number of power supply grips each having a plurality of current collecting brushes driven by a drive chain and supported by rails are moved A power feeding grip inspection device, wherein two power feeding parts for inspection are arranged in front and rear in the moving direction of the power feeding grip at an inspection position for inspecting the current-carrying state of the power feeding grip, and the interval between the power feeding parts for inspection is collected. Insulate between the brushes and the other parts of the rail, and supply power at the position where the feeding grip moves and the top collecting brush touches the front feeding part. A sensor for detecting the grip is provided, and when this sensor detects, a constant current is passed between the two power supply units for inspection and between the two power supply units for inspection Inspection device of the power supply grip in the vertical conveyance type continuous plating apparatus characterized by comprising a voltage relay for outputting a signal when the voltage is greater than or equal to the set value by measuring the voltage. One or more sensors for detecting the power supply grip are provided in front of the direction of movement of the power supply grip of the sensor that detects the power supply grip at the position where the leading current collecting brush contacts the power supply unit for inspection on the front side. The distance between the current collecting brush and the current collecting brush is the same, and when each sensor detects the power supply device, a constant current is passed between two inspection power supply units. Inspecting device for feeding grip in vertical conveyor type continuous plating equipment.

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