JP2016182660A - Workpiece transportation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the intervention between an unloading arm and an insulating plate provided on each side of a power card.SOLUTION: A workpiece transportation method for mounting a plurality of workpieces 2 between a fixed clamp section 12 and a movable clamp section 13 of a transportation apparatus 1, transporting the workpieces 2, unloading the workpieces 2 by an unloading arm 3, and passing the workpieces 2 to a subsequent process, comprises: mounting the workpieces 2 between the fixed clamp 12 and the movable clamp 13 in an unclamping state where the fixed clamp section 12 is apart from the movable clamp section 13; making the movable clamp section 12 close to the fixed clamp section 13, thereby transporting the workpieces 2 in a clamping state where the fixed clamp section 12 and the movable clamp section 13 clamp two side portions 2d, 2e of a power card 2a; maintaining the clamping state until the unloading arm 3 clamps the power card 2a; and changing the clamping state to the unclamping state when the unloading arm 3 unloads the workpieces 2.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a transport method for transporting a plurality of workpieces at once.

  A flat power card in which a plurality of semiconductors are sealed with resin is used for an inverter that converts a direct current into an alternating current.

  Conventionally, there is JP, 2015-023124, A as a technique of such a field. In the stacked cooling unit described in this publication, a cooler is stacked between flat plate-like first and second power cards in which a semiconductor is sealed. Each power card is provided with a heat sink on both side surfaces facing the cooler.

Japanese Patent Laying-Open No. 2015-023124

  When assembling an article using a workpiece having such a power card, a plurality of workpieces may be collectively conveyed to a subsequent process. For transporting the plurality of workpieces, a transport device is used in which the workpieces are erected and arranged in parallel in the direction of the flat plate surface. In this transport device, when a work is placed, a tray gen is provided so as to sandwich the lower side surface of the power card from both sides. However, since the distance between the tray cards is designed to match the standard maximum width of the power card, when a work having a power card with the minimum standard width is placed on the transfer device, there is a small gap between the power card and the tray card. Clearance occurs.

Here, in the step of inserting the work plate into the cooler, which is a post-process after attaching the insulating plate to the power card, it is necessary to take out the work without shaking at all on the insulating plate attached to both surfaces of the power card. However, the thickness of the power card is a few millimeters, and the Trayagen can only guide about a few tens of millimeters below the power card because of the relationship with the clamp, so even if the clearance between the power card and the bevel is very small, A large misalignment occurs at the top of the power card. For this reason, there is a problem that the center of the side surface of the power card may not be clamped when the upper side surface of the power card is clamped by the take-out arm and pulled out from the transport device.
The present invention provides a method for transporting a work in which a pick-up arm and an insulating plate provided on both surfaces of a power card do not interfere when the work is taken out from the transport device.

In the transport method according to the present invention, a work having a power card provided with insulating parts on both sides is placed and transported between a fixed clamp part and a movable clamp part, and the work is taken out by a take-out arm. A workpiece transfer method, wherein the workpiece is placed between the fixed clamp portion and the movable clamp portion in an unclamped state in which the distance between the fixed clamp portion and the movable clamp portion is increased, and the movable By bringing the clamp part closer to the fixed clamp part, the fixed clamp part and the movable clamp part convey the workpiece in a clamped state where both sides of the power card are clamped, and the power card is clamped by the take-out arm. The clamp state is maintained until the take-out arm is fixed to the movable clamp and the movable clamp. From between the parts when taking out the workpiece, to change from the clamping state to the unclamped state.
Thereby, the several power card mounted in the conveying apparatus can be stood | rightened vertically.

  Thereby, when taking out a power card from a conveyance apparatus, it can take out without making an extraction arm and the insulating board provided in both surfaces of a power card interfere.

It is a perspective view which shows the external appearance of a conveying apparatus. It is AA sectional drawing of a conveying apparatus. It is a top view of the conveyance apparatus of the unclamp state in which the workpiece | work was mounted. It is a perspective view of a workpiece. It is an enlarged view of the fixed clamp part of an unclamp state. It is an enlarged view of the movable clamp part of an unclamp state. It is a flowchart of operation | movement. It is a top view of the conveyance apparatus of the clamped state in which the power card was mounted. It is an enlarged view of the fixed clamp part and movable clamp part of a clamp state. It is AA sectional drawing which shows the state which took out the power card mounted in the conveying apparatus and clamped with the arm.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the conveying device 1 includes a base 11, a fixed clamp portion 12 disposed on the base portion 11, and a movable clamp disposed on the base portion 11 so as to face the fixed clamp portion 12. Part 13 and cylinder 14 for operating movable clamp part 13. As shown in FIG. 3, the workpiece 2 is disposed in a standing state between the fixed clamp portion 12 and the movable clamp portion 13 during conveyance.

  As shown in FIG. 4, the workpiece 2 includes a flat power card 2a and insulating plates 2b provided on both surfaces of the power card 2a. A heat radiation grease 2c is applied to the surface where the power card 2a and the insulating plate 2b face each other. Typically, heat sinks (not shown) are provided on both surfaces of the power card 2a. The insulating plate 2b insulates between the power card 2a and the cooler when the work 2 is set in a cooler (not shown) in a process after the work 2 is transported by the transport device 1. The insulating plate 2b is also coated with heat radiation grease 2c on the surface not facing the power card 2a. Thereby, when the workpiece 2 is set in the cooler in the subsequent process, the air layer between the power card 2a and the cooler is eliminated via the insulating plate 2b, and the heat radiation efficiency is improved.

  Further, one side surface of the flat power card 2a is a side portion 2d, and the other side surface is a side portion 2e. The side portions 2d and 2e have shapes that engage with clamp grooves 13c and 37c, which will be described later, respectively. That is, as shown in FIG. 3, the side portions 2 d and 2 e have a shape in which the central portion protrudes from the both surface sides when the work 2 is viewed from above.

  Note that the width of the power card 2a is formed so as to be within the range of the standard minimum width to the standard maximum width, and therefore the length may slightly vary. That is, each power card 2a may have a different distance from the side part 2d to the side part 2e.

  As shown in FIGS. 1 and 2, the base 11 is provided in parallel with the bottom 11a, the first base 11b provided in the upper part of the bottom 11a, and extending in a predetermined direction, and the first base 11b. And a second base portion 11c. Hereinafter, the direction in which the first base portion 11b extends is referred to as the front-rear direction, and the direction in which the first base portion 11b and the second base portion 11c face each other is referred to as the left-right direction. The first base portion 11b and the second base portion 11c are blocks provided so as to extend in the front-rear direction, respectively, and are arranged in the left-right direction with a substantially same interval as the width of the workpiece 2. ing. Hereinafter, the direction in which the first base portion 11b and the second base portion 11c face each other may be referred to as an inner side (or inner direction), and the opposite direction as an outer side (or outer direction). The first base portion 11b and the second base portion 11c are connected by a connecting portion 11d extending in the left-right direction.

  The fixed clamp portion 12 is a block that is fixed to the upper portion of the first base portion 11b and extends in the front-rear direction. As shown in FIG. 5, the fixed clamp part 12 has a main body part 12a and a plurality of substantially rectangular parallelepiped protrusions 12b extending in the vertical direction inside the main body part 12a. Moreover, as shown in FIG. 3, the plurality of protrusions 12b are provided in parallel in the front-rear direction. In the inner direction of each protrusion 12b, there is a clamp groove 12c extending in the vertical direction. The lower side 2d of the power card 2a is disposed in the clamp groove 12c. The clamp groove 12c has a V-shaped shape when viewed from the top, and the V-shaped leading end portion that is notched is further cut outward.

  As shown in FIG. 2, the movable clamp unit 13 includes an LM (linear motion) guide 31, a pedestal 32 that extends in the front-rear direction and is guided by the LM guide 31 and operates in the left-right direction, and the pedestal 32 in the left-right direction. A first coil spring 33 that is operated to the outside, a first stopper bolt 34 that is provided outside the pedestal 32 and stops the pedestal 32 that is operated in the outward direction at a predetermined position, and is provided inside the pedestal 32. A second stopper bolt 35 for stopping the pedestal 32 operating in the inward direction at a predetermined position, a shoulder plate 36 extending in the front-rear direction and connected to the inner side surface 32 c of the pedestal 32, and provided on the pedestal 32. The plurality of movable clamp claws 37, the plurality of clamp claw guide portions 38 for guiding the movable clamp claws 37 and the pedestal 32 to slide in the left-right direction, and the movable clamp claws 37 in the left-right direction It includes a plurality of second coil spring 39 to be operated inward direction.

  In the LM guide 31, an LM rail is provided on the upper portion of the second base portion 11 c, and an LM block is connected to the pedestal 32. When the LM block moves in the left-right direction on the LM rail, the pedestal 32 can freely move in the left-right direction with respect to the second base portion 11c.

  The pedestal 32 is a block that is L-shaped when viewed from an elevation and extends in the front-rear direction. The pedestal 32 has a bottom portion 32a and a wall portion 32b erected on the top in the outer side direction of the bottom portion 32a. The inner surface 32c is the inner surface of the bottom 32a and the outer surface 32d is the outer surface of the wall 32b.

  On the upper surface of the bottom portion 32a, a plurality of movable clamp claws 37 are arranged in parallel in the front-rear direction. A shoulder plate 36 is connected to the inner surface 32c of the bottom 32a. A plurality of clamp pawl guide portions 38 extending in the left-right direction pass through the wall portion 32b.

  The first coil spring 33 is connected to the inner side surface 32 c of the pedestal 32 and a fixing portion (not shown) provided upright on the second base portion 11 b inside the inner side surface 32 c of the pedestal 32. The first coil spring 33 moves the pedestal 32 in the outward direction by elastic force when the state where the pedestal 32 is pressed from the outside to the inside by the cylinder 14 is released.

  The first stopper bolt 34 is provided outside the pedestal 32 and is connected to the second base portion 11c. The first stopper bolt 34 stops the pedestal 32 at a predetermined position by coming into contact with the outer surface 32d when the pedestal 32 moves outward by the elastic force of the first coil spring 33.

  The 2nd stopper volt | bolt 35 is provided inside the base 32, and is connected with the 2nd base 11c. For example, the second stopper bolt 35 is connected to a fixed portion erected on the second base portion 11 b on the inner side of the inner side surface 32 c of the base 32. The second stopper bolt 35 stops the pedestal 32 at a predetermined position by coming into contact with the inner side surface 32c of the pedestal 32 when the pedestal 32 is moved inward by the operation of the cylinder 14 described later.

  The shoulder plate 36 is a plate extending in the front-rear direction. The shoulder plate 36 is fixed to the pedestal 32 by bolts 36c passing through the shoulder plate 36. The upper position of the shoulder plate 36 is disposed so as to protrude slightly above the upper surface of the bottom 32 a of the pedestal 32. An inner side surface 37a of a movable clamp claw 37, which will be described later, abuts on the outer side surface 36b of the portion where the shoulder plate 36 protrudes upward from the bottom portion 32a. Further, when the work 2 is inserted into the conveying device 1, the lower portion of the side portion 2 e of the power card 2 a contacts the upper surface 36 a of the shoulder plate 36.

  The plurality of movable clamp claws 37 are provided in parallel in the front-rear direction on the bottom 32 a of the base 32. The movable clamp pawl 37 is a substantially rectangular parallelepiped block and can be individually operated. As shown in FIG. 6, a substantially rectangular parallelepiped protrusion 37 b extending in the vertical direction is provided on the inner side surface 37 a of the movable clamp claw 37. A clamp groove 37c extending in the vertical direction is formed inside the protrusion 37b. The shape of the clamp groove 37c is the same shape as the clamp groove 12c. Here, the projecting portion 37b is provided at a position facing the projecting portion 12b provided on the fixed clamp portion 12, and the clamp groove 37c and the clamp groove 12c are facing each other.

  A part of the clamp claw guide portion 38 is inserted into the movable clamp claw 37. The lower part of the inner side surface 37a of the movable clamp claw 37 has a notch shape, and when the movable clamp claw 37 is moved inward by the second coil spring 39, the inner side surface 37d of the cutout portion is the shoulder plate. Abuts against the outer surface 36b of 36. In this case, the protrusion 37b of the movable clamp claw 37 is disposed above the shoulder plate 36.

  The clamp claw guide portion 38 is a bolt that extends in the left-right direction and extends through the wall portion 32 b of the base 32 in the left-right direction. The clamp claw guide portions 38 are arranged in two upper and lower rows and are provided in parallel in the front-rear direction. When N movable clamp claws 37 provided on the bottom 32a of the base 32 are provided in parallel in the front-rear direction (N is an arbitrary number), the clamp claw guide portion 38 is similarly N rows are provided in the front-rear direction. Further, the tip of the clamp claw guide portion 38 is inserted from the outer side of the movable clamp claw 37 and disposed inside. For example, the clamp claw guide portion 38 a provided above the clamp claw guide portion 38 is fixed to the wall portion 32 b of the pedestal 32 and slides inside the movable clamp claw 37. The clamp claw guide portion 38 b provided below is fixed inside the movable clamp claw 37 and slides against the wall portion 32 b of the pedestal 32.

  One end of the plurality of second coil springs 39 is connected to the movable clamp claw 37, and the other end is connected to the wall portion 32 b of the pedestal 32. The second coil spring 39 moves the movable clamp claw 37 in the inner direction relative to the base 32 by an elastic force. For example, the second coil spring 39 is formed around the clamp claw guide portion 38b so that the clamp claw guide portion 38b is disposed inside. The second coil spring 39 may be formed so as to be integrated with the clamp claw guide portion 38b.

  The cylinder 14 is a power unit provided outside the movable clamp unit 13. The cylinder 14 moves the base 32 in the inner direction by pressing the outer surface 32d of the base 32 in the inner direction.

  The take-out arm 3 is provided above the transfer device 1 at a position after the work 2 is transferred by the transfer device 1. The take-out arm 3 clamps the side portions 2d and 2e in the vicinity of the upper portion of the power card 2a and takes it out upward.

  Next, the operation of the transport device 1 will be described with reference to FIG.

  First, the fixed clamp part 12 and the movable clamp part 13 are put into an unclamped state (S1). Specifically, in the transport device 1, the pedestal 32 is in a state of being moved outward by the elastic force of the first coil spring 33, and is stationary by coming into contact with the first stopper bolt 34.

  At this time, the plurality of movable clamp claws 37 are in a state where they are moved inward by the elastic force of the second coil springs 39 connected thereto, and the inner side surface 37a abuts against the shoulder plate 36 and is stationary. Thereby, the distance of the clamp groove 12c of the fixed clamp part 12 and the clamp groove 37c of the movable clamp nail | claw 37 is arrange | positioned longer than the maximum standard width of the power card 2a.

  Next, the workpiece 2 is placed from above the transfer device 1 (S2). As shown in FIGS. 5 and 6, the conveying device 1 is in an unclamped state, and the side portions 2d and 2e of the power card 2a slide with respect to the wall portion that forms the clamp groove 12c and the clamp groove 37c. Without being inserted into the clamp grooves 12c and 37c. Thereafter, the lower portion of the side portion 2e of the inserted power card 2a comes into contact with the shoulder plate 36. As a result, as shown in FIG. 3, the side portions 2d and 2e of the plurality of power cards 2a are placed in the clamp grooves 12c and the clamp grooves 37c in an unclamped state.

  Next, in the conveying apparatus 1, the power card 2a inserted into the clamp groove 12c and the clamp groove 37c is brought into a clamped state (S3).

  Specifically, the cylinder 14 contacts the outer surface 32d of the pedestal 32 by operating in the inner direction, and presses the pedestal 32 in the inner direction. Accordingly, the pedestal 32 is guided by the LM guide 31 on the second base portion 11c and operates in the inward direction.

  At this time, the movable clamp claw 37 disposed on the pedestal 32 moves in the inner direction as the pedestal 32 moves in the inner direction. Thereby, the wall part which forms the clamp groove | channel 37c of the movable clamp nail | claw 37 contact | abuts to the side part 2e of the power card 2a.

  The pedestal 32 is further pressed by the cylinder 14 and moves inward. Thereby, the wall part which forms the clamp groove | channel 37c contact | abuts to the power card 2a, and presses it inside. Thereby, as shown in FIG. 6, the wall part which forms the clamp groove | channel 12c of the fixed clamp part 12 will be in the state contact | abutted to the side part 2d of the power card 2a. Therefore, the side portions 2d and 2e of the power card 2a are clamped by the fixed clamp portion 12 and the movable clamp portion 13.

  Here, since the power card 2a has a variation in width, in the place where the work 2 having the long power card 2a is set, the power is reduced by the movable clamp claw 37 and the fixed clamp portion 12. It will be in a clamped state prior to the place where the work 2 having the card 2a is set.

  Thereafter, the cylinder 14 further moves in the inward direction, so that the base 32 is further moved in the inward direction. Thereby, it will be in a clamped state in the location in which the workpiece | work 2 which has the short power card 2a is set.

  At this time, in the location where the work 2 having the long power card 2a is set, the second coil spring 39 contracts by the movable clamp claw 37 being pressed against the power card 2a. Thereby, the movable clamp nail | claw 37 moves to an outer side direction relatively with respect to the base 32 in the state which clamped the power card 2a. In this way, the difference in the width of the power card 2 a is absorbed by the second coil spring 39. Therefore, by moving the pedestal 32 inward, as shown in FIGS. 8 and 9, all the power cards 2 a are clamped between the fixed clamp portion 12 and the movable clamp portion 13.

  The conveyance device 1 conveys the workpiece 2 by moving while maintaining the clamp state by the fixed clamp portion 12 and the movable clamp portion 13 (S4).

  Next, as shown in FIG. 10, the take-out arm 3 provided above the transport device 1 clamps the side portions 2d and 2e near the upper portion of the power card 2a (S5). At this time, since the power card 2a is in a clamped state by the fixed clamp portion 12 and the movable clamp portion 13, the workpiece 2 stands vertically. Therefore, the take-out arm 3 can clamp the side portions 2d and 2e of the power card 2a without being in contact with the insulating plate 2b provided on the work 2 by adjusting to the position of the upper part of the work 2 standing upright.

  Next, the conveying apparatus 1 changes the fixed clamp part 12 and the movable clamp part 13 to an unclamped state (S6).

  Specifically, the cylinder 14 is moved outwardly so that the cylinder 14 and the pedestal 32 are separated. That is, the pressing of the base 32 by the cylinder 14 is released. At this time, the pedestal 32 is guided by the LM guide 31 and moves outward by the elastic force of the first coil spring 33.

  Here, the movable clamp claw 37 in contact with the power card 2 a moves inward relative to the pedestal 32 by the elastic force of the second coil spring 39 when the pedestal 32 moves outward. Accordingly, the movable clamp claw 37 moves inward relative to the base 32 until it comes into contact with the shoulder plate 36. Thereafter, when the pedestal 32 further moves outward, it is pressed by the shoulder plate 36, and the movable clamp pawl 37 moves outward and moves away from the power card 2a. Thereby, the fixed clamp part 12 and the movable clamp part 13 will be in an unclamped state.

  The pedestal 32 moves outward and stops until it comes into contact with the first stopper bolt 34 by the elastic force of the first coil spring 33.

  Thereafter, the take-out arm 3 pulls the workpiece 2 upward from the transfer device 1 (S7). Here, as shown in FIG. 4, since the fixed clamp portion 12 and the movable clamp portion 13 are in an unclamped state, the power card 2a includes side walls 2d and 2e and wall portions that form the clamp grooves 12c and the clamp grooves 37c. It is pulled out by the take-out arm 3 without sliding.

  Thereby, the workpiece | work 2 can be made to stand perpendicularly in the conveying apparatus 1, and the taking-out arm 3 can clamp the side surface center of the power card 2a. Therefore, the take-out arm 3 does not interfere with the insulating plates 2b provided on both surfaces of the power card 2a. Further, after the take-out arm 3 clamps the power card 2a, the fixed clamp portion 12 and the movable clamp portion 13 are in an unclamped state, so that the take-out arm 3 slides the transport device 1 and the power card 2a. The workpiece 2 can be taken out without any trouble. Thereby, abrasion of the conveying apparatus 1 can be prevented.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, a plurality of LM guides 31 may be provided in the upper part of the second base portion 11 c, and the horizontal movement of the base 32 may be guided by the plurality of LM guides 31. A plurality of first coil springs 33 may be disposed on the pedestal 32. A plurality of second coil springs 39 may be arranged for one movable clamp claw 37.

DESCRIPTION OF SYMBOLS 1 Conveying device 2 Work 2a Power card 2b Insulating plate 2c Radiation grease 2d, 2e Side part 3 Taking-out arm 11 Base part 11a Bottom part 11b 1st base part 11c 2nd base part 11d Connection part 12 Fixed clamp part 12a Main body part 12b Protrusion part 12c Clamp groove 13 Movable clamp portion 14 Cylinder 31 Guide 32 Base 32a Bottom portion 32b Wall portion 32c Inner side surface 32d Outer side surface 33 First coil spring 34 First stopper bolt 35 Second stopper bolt 36 Shoulder contact plate 36a Upper surface 36b Outer side surface 36c Bolt 37 Movable clamp claw 37a Inner side surface 37b Projection part 37c Clamp groove 38 Clamp claw guide part 39 Second coil spring

Claims (1)

This is a method for transporting a workpiece having a power card having an insulating portion provided on both sides, placed between a fixed clamp portion and a movable clamp portion, and taking out the workpiece by a take-out arm and delivering it to a subsequent process. And
In an unclamped state in which the distance between the fixed clamp part and the movable clamp part is separated, the workpiece is placed between the fixed clamp part and the movable clamp part,
By bringing the movable clamp part closer to the fixed clamp part, the fixed clamp part and the movable clamp part convey the workpiece in a clamped state in which both side parts of the power card are clamped,
Maintaining the clamped state until the power card is clamped by the take-out arm,
A method for conveying a workpiece, wherein the take-out arm changes from the clamped state to the unclamped state when taking out the workpiece from between the fixed clamp part and the movable clamp part.

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