JP5983932B2 - Work transfer device - Google Patents

Description

  The present invention relates to a work transfer device for transferring a work such as an electronic component.

  For example, in the electronic component manufacturing process, when applying a functional paint (slurry) such as an insulator to an electronic component substrate such as a ceramic plate, a predetermined amount of slurry is uniformly applied to the surface of the material, and then dried and fixed. It is necessary to let Patent Document 1 below discloses a coating machine and a coating method for coating a polyvinylidene chloride coating material on an article such as a PET container. This coating method is a method of attaching a film to a non-horizontal receiving surface of an article, supplying a liquid paint to the back surface of the curtain plate so as to spread the paint on the back surface, and dropping as a curtain from the lower edge of the curtain plate; The process of moving the article and the curtain plate continuously relative to each other so that the article intersects the curtain so that the receiving surface intersects the curtain, and the paint is allowed to freely flow down to the receiving surface and the paint is freely released therefrom. It consists of a step of discharging and a step of drying the attached film on the receiving surface.

JP-T 63-501200

  When the workpiece is electronic and sensitive to impact, the method of forcibly dropping the workpiece when the workpiece is discharged has a high risk of workpiece damage. Therefore, when the workpiece is discharged, it is necessary to temporarily stop the workpiece transfer operation and discharge the workpiece so that no impact is applied. For such an application, an index table for intermittently moving the work around can be used. On the other hand, from the viewpoint of uniformity of application, it is necessary to continue the rotation (spinning) of the workpiece continuously even if the conveying operation is stopped.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a workpiece transfer device capable of continuously rotating a workpiece while intermittently transferring the workpiece using an index table. Is to provide.

One embodiment of the present invention is a work transfer device. This work transfer device
An index table that is driven to rotate intermittently;
A workpiece holding unit that is intermittently moved by the index table and that holds the workpiece rotatably;
A rotating disk disposed coaxially with the index table and continuously rotated relative to the index table;
Rotation transmitting means for transmitting relative rotation of the rotating disk with respect to the index table to the work holding unit to rotate the work held by the work holding unit;
Transmission blocking means for blocking rotation transmission by the rotation transmission means when the work holding unit comes to a predetermined rotation position ,
The rotation transmitting means includes a first fulcrum shaft supported by the index table, a oscillating shaft supported so as to be able to oscillate about the first fulcrum shaft, and rotatably supported by the oscillating shaft. A driving pulley, a first urging means for urging the swing shaft so as to press the driving pulley against the rotating disk, and a driven pulley that forms a winding conduction mechanism together with the driving pulley. , a work held on the work holding unit Ru is rotated by the rotation of the driven pulley.

  The transmission blocking means may separate the drive pulley that has come to a predetermined circumferential position from the rotating disk.

  You may provide the attitude | position conversion maintenance means to convert and hold | maintain the workpiece | work holding | maintenance attitude | position by the said workpiece | work holding unit to a predetermined attitude | position when the transmission of the rotation by the said rotation transmission means is interrupted | blocked.

  The posture conversion maintaining means includes two protrusions provided on an end surface portion of a rotating shaft of a work held by the work holding unit, and a second fulcrum substantially parallel to the rotating shaft on the side of the two protrusions. And an arm supported rotatably on a shaft, and the rotation axis of the workpiece may be converted to a predetermined angle and maintained by bringing the arm into contact with the two protrusions.

Another aspect of the present invention is a work transfer device. This work transfer device
An index table that is driven to rotate intermittently;
A workpiece holding unit that is intermittently moved by the index table and that holds the workpiece rotatably;
A rotating disk disposed coaxially with the index table and continuously rotated relative to the index table;
Rotation transmitting means for transmitting relative rotation of the rotating disk with respect to the index table to the work holding unit to rotate the work held by the work holding unit;
A transmission blocking means for blocking transmission of rotation by the rotation transmitting means when the work holding unit comes to a predetermined rotation position;
Posture conversion maintaining means for converting and maintaining the workpiece holding posture by the workpiece holding unit when the rotation transmission by the rotation transmitting device is interrupted,
The posture conversion maintaining means includes two protrusions provided on an end surface portion of a rotating shaft of a work held by the work holding unit, and a second fulcrum substantially parallel to the rotating shaft on the side of the two protrusions. And an arm supported rotatably on the shaft, and the rotation axis of the workpiece is converted into a predetermined angle and maintained by bringing the arm into contact with the two protrusions.
The posture conversion maintaining means includes second urging means for applying an urging force to the arm, and the second urging means is a rotation position where the arm is closer to the rotation axis of the workpiece than the boundary position. The arm is urged in a direction to contact the two protrusions, and when the arm is in a rotational position farther from the rotation axis of the workpiece than the boundary position, the arm is moved from the two protrusions. You may energize in the direction to leave.

  When the workpiece holding posture of the workpiece holding unit is maintained in a predetermined posture by the posture conversion maintaining means, the workpiece is supplied to and discharged from the workpiece holding unit, and the workpiece held in the workpiece holding unit is You may apply | coat a liquid material to the said workpiece | work when rotating with a rotation transmission means, and may dry after application | coating.

  The rotating disk may be controlled so that a relative rotational speed with respect to the index table is constant.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the present invention, it is possible to continuously continue the rotation of the workpiece while intermittently conveying the workpiece using the index table.

The schematic plan view of the workpiece conveyance apparatus which concerns on embodiment of this invention. Sectional drawing of station S3-S15 of FIG. Sectional drawing before the workpiece | work attitude | position conversion of station S17 of FIG. Sectional drawing after the workpiece | work attitude | position conversion of station S17 of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  FIG. 1 is a schematic plan view of a workpiece transfer apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the stations S3 to S15 in FIG. FIG. 3 is a cross-sectional view of the station S17 of FIG. FIG. 4 is a cross-sectional view of the station after the work posture conversion. 2 to 4, illustration of the configuration relating to coating and drying is omitted.

  The index table 1 is a table for transporting the mounted work holding member 14 (work chuck unit) to each station. A total of 18 workpiece holding members 14 are arranged and fixed on the outer periphery of the index table 1 at intervals of 20 °, for example. The index table 1 is directly connected to a servo motor (not shown), and is rotationally driven in the clockwise direction in FIG. The work holding member 14 rotates (revolves) in the clockwise direction in FIG. 1 by 20 ° intermittent feed as the index table 1 rotates.

  The workpiece 6 is supplied to the workpiece holding member 14 at the station S1 shown in FIG. The work holding member 14 holds (holds) the supplied work 6 and sequentially goes around each station. A station S3 in the middle is an application unit 8 where a liquid material (slurry) is applied to the workpiece 6 by a shower 7. Subsequent stations S4 to S15 are a drying unit 9 (drying furnace). Here, the workpiece 6 enters, for example, a tunnel, and drying (temporary drying) after application is performed by blowing hot air or warm air. The work holding member 14 discharges the work 6 at the station S17. In the station S18, the workpiece holding member 14 is cleaned with the chuck. The chuck cleaning is performed by, for example, a brush being put into and out of the V groove of the chuck and automatically performed by the chuck cleaning unit 15.

  As a method of applying the slurry to the workpiece 6, for example, (1) dip coating, (2) spray coating, (3) nozzle coating, (4) shower coating, etc. are conceivable. Here, there are problems such as a large variation in coating amount in dip coating, a low slurry recovery rate in spray coating, a large variation in ejection amount in nozzle coating, and a difficulty in discharging a high viscosity slurry. In addition, although there is a difficulty in ensuring the uniformity of the coating film thickness in the shower coating, an object of the present embodiment is to obtain a uniform film thickness by a structurally simple shower coating.

  In order to apply a uniform coating film to the workpiece 6 by shower coating, it is important that the workpiece 6 continues to rotate (rotate) continuously from slurry application to drying (that is, during the laps of the stations S3 to S15). is there. The continuous rotation speed is preferably constant. On the other hand, for automation, it is necessary to maintain the posture (angle) at which the workpiece 6 is held and held by the workpiece holding member 14 (angle) when the workpiece 6 is supplied and discharged. From such a background, the workpiece transfer device of the present embodiment always rotates (spins) the workpiece 6 at a constant speed during slurry application and drying, and keeps the posture (angle) of the workpiece 6 at the time of delivery of the workpiece 6. It has a mechanism to hold. Details of the configuration will be described below.

  As shown in FIGS. 2 to 4, a cylindrical support portion 16 is fixed substantially vertically through the index table 1 whose top surface is horizontal. A first fulcrum shaft 18 is rotatably supported on the cylindrical support portion 16 via a bearing 17. A lever 19 is integrally fixed to the upper end portion of the first fulcrum shaft 18. A spring mounting bracket 20 is attached and fixed to one end of the lever 19. One end of a spring 22 as a first urging means is attached to the spring mounting bracket 20. The spring 22 is a coil spring, for example. The other end of the spring 22 is attached to a spring mounting bracket 21 that is erected and fixed to the index table 1. The spring 22 biases the lever 19 in a direction to rotate counterclockwise in plan view. A swing shaft 23 is erected and fixed to the other end side of the lever 19. The swing shaft 23 is substantially parallel to the rotation axis of the index table 1. A driving pulley 25 is rotatably supported on the swing shaft 23 via a bearing 24. Two loop-shaped concave grooves are provided on the outer peripheral surface of the drive pulley 25 and an O-ring 26 is fitted therein. As shown in FIG. 2, the outer peripheral surface (O-ring 26) of the drive pulley 25 contacts the outer peripheral surface of the rotating disk 2. The contact force is applied via the lever 19 by the bias of the spring 22. A roller 27 serving as a cam follower is attached to the upper end portion of the swing shaft 23. The rotating disk 2 is provided coaxially with the index table 1, is directly connected to a servo motor (not shown), and continuously rotates in the same direction at a higher speed than the index table 1. The rotating disk 2 is preferably rotated while being synchronously controlled so that the relative speed with respect to the index table 1 is always constant. The relative rotation of the rotary disk 2 with respect to the index table 1 is used as power for rotating (spinning) the workpiece 6. This will be described later.

  A support mechanism 3 is fixed to the outer periphery of the index table 1. A work holding member 14 is fixedly supported on the support mechanism 3. That is, the pair of brackets 4 are fixed to the support mechanism 3. The relay shaft 37 is rotatably supported so as to pass between the one end sides of the pair of brackets 4. Relay pulleys 35 and 36 are fixed to the relay shaft 37 so as to be integrally rotatable. A round belt 34 is wound around the relay pulley 35 and the drive pulley 25 to transmit the rotation. At this time, the rotation of the driving pulley 25 about the vertical direction is converted into the rotation of the relay pulley 35 about the horizontal direction. The relay shaft 37 is rotated by the rotation of the relay pulley 35, and the relay pulley 36 is further rotated. A work rotation shaft 43 is rotatably supported on the other end of one bracket 4. A driven pulley 48 is fixed to the work rotation shaft 43 so as to be integrally rotatable. A timing belt 38 is wound around the driven pulley 48 and the relay pulley 36 to transmit the rotation. One of the pair of chucks 5 (FIG. 1) is fixed to the work rotation shaft 43 so as to be integrally rotatable. The other of the pair of chucks 5 is rotatably supported by the other of the pair of brackets 4. The pair of chucks 5 grips both ends of the workpiece 6 (FIG. 1). A pair of rollers 44 (exemplification of protrusions) are provided to protrude from the end surface portion of the work rotation shaft 43.

  One bracket 4 rotatably supports an arm 41 via a second fulcrum shaft 47. A spring mounting bracket 42 is fixed to the arm 41, a spring mounting bracket 46 is fixed to one bracket 4, and a spring 45 as a second urging means is mounted between the spring mounting brackets 42 and 46. The spring 45 is, for example, a coil spring (tensile coil spring). One bracket 4 is provided with a restricting member 39 so that the arm 41 is in contact with the restricting member 39 by the bias of a spring 45 when the workpiece 6 is rotated (FIG. 2).

  As shown in FIGS. 3 and 4, a cam support shaft 29 is fixed to a fixed frame 28 fixed to a device base (not shown). A plate cam 30 as a transmission blocking means is fixed to the lower end portion of the cam support shaft 29. The plate cam 30 is provided across the stations S17, S18, S1 in FIG. The aforementioned roller 27 rides on the outer peripheral surface of the plate cam 30 at stations S17, S18, and S1. As a result, the swing shaft 23 swings clockwise against the biasing of the spring 22 (counterclockwise biasing in plan view), and the contact between the outer peripheral surface of the drive pulley 25 and the outer peripheral surface of the rotary disk 2 occurs. Is released, and the transmission of rotation from the rotary disk 2 to the drive pulley 25 is interrupted.

  As shown in FIGS. 3 and 4, an air cylinder 31 (actuator) is fixed to the fixed frame 28. A pusher 33 is fixed to the tip of the piston rod 32 of the air cylinder 31. The pusher 33 pushes the roller 40 provided on the arm 41 to the outside against the urging of the spring 45 (the urging in the clockwise direction in the figure) (FIG. 4). As a result, the arm 41 rotates outward (counterclockwise), and when the spring mounting brackets 42 and 46 and the second fulcrum shaft 47 exceed the rotational position (boundary position) where they are aligned, the spring 45 is biased. The arm 41 abuts against the pair of rollers 44 (biased counterclockwise in the figure). Thus, the holding posture of the workpiece 6 by the workpiece holding member 14 is converted into the horizontal direction. After receiving the workpiece 6 at the station S1 in FIG. 1, it is necessary to return the arm 41 to the state shown in FIGS. Therefore, the station S1 has the same configuration as the air cylinder 31 and the like of the station S17, and the arm 41 is rotated clockwise against the biasing of the spring 22 (counterclockwise biasing in the figure). Let me return.

  Hereinafter, the operation of the workpiece transfer apparatus of the present embodiment will be described.

  A workpiece supply unit 10 shown in FIG. The workpiece 6 is measured for weight by the pre-application weight measuring unit 11. Thereafter, the workpiece 6 is supplied to the workpiece holding member 14 at the station S <b> 1 and is gripped by the chuck 5 of the workpiece holding member 14. At this time, as shown in FIG. 4, the rotation position of the work rotation shaft 43, that is, the rotation position of one chuck 5 is fixed by the arm 41. Thereafter, at the station S1, the arm 41 is rotated toward the regulating member 39, and the arm 41 is brought into the state shown in FIG.

  Subsequently, the workpiece holding member 14 moves to the station S <b> 2 by the intermittent rotation of the index table 1. Then, the roller 27 riding on the outer peripheral surface of the plate cam 30 returns to the original position, and the outer peripheral surface (O-ring 26) of the drive pulley 25 comes into contact with the outer peripheral surface of the rotary disk 2 as shown in FIG. As a result, the relative rotation of the rotary disk 2 with respect to the index table 1 is transmitted to the driven pulley 48 via the driving pulley 25 and the relay pulleys 35, 36, the workpiece rotating shaft 43 and the chuck 5 rotate, and the workpiece 6 rotates ( Rotate). By synchronously controlling the relative speed of the rotating disk 2 with respect to the index table 1 so as to be always constant, the workpiece 6 can be continuously rotated at a constant rotational speed.

  When the workpiece holding member 14 is moved to the station S3 (application unit 8) by the intermittent rotation of the index table 1, a liquid material (slurry) is applied to the workpiece 6 by the shower 7. Thereafter, while the work holding member 14 moves around the stations S4 to S15 (drying unit 9) by intermittent rotation of the index table 1, hot air or warm air is blown onto the work 6 to perform temporary drying after application.

  The roller 27 rides on the outer peripheral surface of the plate cam 30 while the workpiece holding member 14 moves from station S16 to S17 by intermittent rotation of the index table 1, and the outer peripheral surface of the drive pulley 25 and the outer peripheral surface of the rotary disk 2 are in contact with each other. The contact is released, and the rotation transmission from the rotary disk 2 to the drive pulley 25 is interrupted (FIG. 2 → FIG. 3).

  Thereafter, in the station S17, the air cylinder 31 is operated, the pusher 33 pushes the roller 40 outward, and the arm 41 comes into contact with the pair of rollers 44 (FIG. 4). Thereby, the holding posture of the workpiece 6 by the workpiece holding member 14 is converted into a predetermined posture (horizontal direction) and maintained. Thereafter, at the station 17, the chuck 5 releases the workpiece 6 and discharges it. At this time, the workpiece 6 is delivered from the chuck 5 so that an impact is not applied to a transfer table (not shown). The weight of the workpiece 6 is measured by the weight measuring unit 12 after application, and aligned and conveyed by the workpiece take-out unit 13. On the other hand, the workpiece holding member 14 is moved to the station S18 by the intermittent rotation of the index table 1 so that the chuck 5 is cleaned, and further moved to the station S1 to receive the next workpiece 6. The above operation is performed in parallel with 18 systems.

  According to the present embodiment, the following effects can be achieved.

(1) The index table 1 that operates intermittently is used for the workpiece 6 conveyance system, and the conveyance operation is temporarily stopped when the workpiece 6 is supplied and discharged (during delivery), and when the workpiece 6 is delivered by the workpiece holding member 14. Since the holding posture of the workpiece 6 is maintained in a predetermined posture (a posture in which the workpiece 6 is easily transferred), the workpiece 6 is smoothly transferred to and from the chuck 5, and the risk of an impact on the workpiece 6 is reduced.

(2) Since the work 6 is rotated (rotated) using the rotation of the rotating disk 2 that rotates continuously relative to the index table 1, the work 6 is continuously conveyed while using the index table 1 for transporting the work 6. Can continue to rotate. Since the slurry is applied to the workpiece 6 and dried while the workpiece 6 is continuously rotated, a uniform film thickness can be obtained by structurally simple shower coating.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  The rotation transmission from the driving pulley 25 to the driven pulley 48 may be performed without using the relay pulleys 35 and 36.

  The angle of intermittent rotation of the index table 1 and the number of stations are arbitrary regardless of the example of the embodiment, and are appropriately determined according to the design convenience.

DESCRIPTION OF SYMBOLS 1 Index table, 2 Rotating disk, 3 Support mechanism, 4 Bracket, 5 Chuck, 6 Workpiece, 7 Shower, 8 Application part, 9 Drying part, 10 Work supply part, 11 Pre-application weight measurement part, 12 Post-application weight measurement part , 13 Workpiece removal part, 14 Workpiece holding member, 15 Chuck cleaning part, 16 Cylindrical support part, 17 Bearing, 18 First fulcrum shaft, 19 Lever, 20 Spring mounting bracket, 21 Spring mounting bracket, 22 Spring, 23 Swing Shaft, 24 Bearing, 25 Drive pulley, 26 O-ring, 27 Roller, 28 Fixed frame, 29 Cam support shaft, 30 Plate cam, 31 Air cylinder, 32 Piston, 33 Pusher, 34 Round belt, 35 Relay pulley, 36 Relay pulley 37 Relay shaft, 38 Timing belt, 39 Member, 40 a roller, 41 arm, 42 a spring mounting bracket, 43 work rotating shaft, 44 a roller, 45 a spring, 46 spring mounting bracket, 47 a second pivot shaft, 48 driven pulley

Claims (8)

An index table that is driven to rotate intermittently;
A workpiece holding unit that is intermittently moved by the index table and that holds the workpiece rotatably;
A rotating disk disposed coaxially with the index table and continuously rotated relative to the index table;
Rotation transmitting means for transmitting relative rotation of the rotating disk with respect to the index table to the work holding unit to rotate the work held by the work holding unit;
Transmission blocking means for blocking rotation transmission by the rotation transmission means when the work holding unit comes to a predetermined rotation position ,
The rotation transmitting means includes a first fulcrum shaft supported by the index table, a oscillating shaft supported so as to be able to oscillate about the first fulcrum shaft, and rotatably supported by the oscillating shaft. A driving pulley, a first urging means for urging the swing shaft so as to press the driving pulley against the rotating disk, and a driven pulley that forms a winding conduction mechanism together with the driving pulley. the Ru has been the workpiece held by the workpiece holding unit is rotated by the rotation of the driven pulley, the workpiece transfer apparatus. The workpiece transfer apparatus according to claim 1 , wherein the transmission blocking unit separates the drive pulley that has come to a predetermined rotation position from the rotating disk. Workpiece transfer apparatus according to claim 1 or 2 holding posture of the workpiece by the workpiece holding unit includes a posture changing maintaining means for converting maintained at a predetermined posture when the rotation of the transmission by the rotation transmitting means is interrupted . The posture conversion maintaining means includes two protrusions provided on an end surface portion of a rotating shaft of a work held by the work holding unit, and a second fulcrum substantially parallel to the rotating shaft on the side of the two protrusions. The workpiece according to claim 3 , further comprising: an arm rotatably supported on a shaft, wherein the workpiece is brought into contact with the two protrusions to convert and maintain the rotation axis of the workpiece at a predetermined angle. Conveying device. An index table that is driven to rotate intermittently;
A workpiece holding unit that is intermittently moved by the index table and that holds the workpiece rotatably;
A rotating disk disposed coaxially with the index table and continuously rotated relative to the index table;
Rotation transmitting means for transmitting relative rotation of the rotating disk with respect to the index table to the work holding unit to rotate the work held by the work holding unit;
A transmission blocking means for blocking transmission of rotation by the rotation transmitting means when the work holding unit comes to a predetermined rotation position;
Posture conversion maintaining means for converting and maintaining the workpiece holding posture by the workpiece holding unit when the rotation transmission by the rotation transmitting device is interrupted,
The posture conversion maintaining means includes two protrusions provided on an end surface portion of a rotating shaft of a work held by the work holding unit, and a second fulcrum substantially parallel to the rotating shaft on the side of the two protrusions. A workpiece transfer device having an arm rotatably supported by a shaft, and converting the rotation axis of the workpiece to a predetermined angle and maintaining the arm by contacting the two projections. The posture conversion maintaining means includes second urging means for applying an urging force to the arm, and the second urging means is a rotation position where the arm is closer to the rotation axis of the workpiece than the boundary position. The arm is urged in a direction to contact the two protrusions, and when the arm is in a rotational position farther from the rotation axis of the workpiece than the boundary position, the arm is moved from the two protrusions. The work transfer device according to claim 4 or 5, wherein the work transfer device is biased in a direction away from the workpiece. When the workpiece holding posture of the workpiece holding unit is maintained in a predetermined posture by the posture conversion maintaining means, the workpiece is supplied to and discharged from the workpiece holding unit, and the workpiece held in the workpiece holding unit is The work conveying apparatus according to any one of claims 3 to 6, wherein a liquid material is applied to the work while being rotated by a rotation transmission unit, and drying after the application is performed.   The work conveying apparatus according to claim 1, wherein the rotating disk is controlled so that a relative rotational speed with respect to the index table is constant.