JP2018122440A - Solder automatic replenishment unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solder automatic replenishment unit in which a solder container is automatically replaced.SOLUTION: The solder automatic replenishment unit is provided that includes: replacement means for arranging a replenishment solder container 8a and a used solder container 8b in the respective predetermined positions where both containers are moved in the rotational direction; delivery means for delivering the replenishment solder container 8a and the used solder container 8b between a printer and the solder automatic replenishment unit; carrying-in means for supplying the replenishment solder container 8a to the replacement means, carrying-out means for carrying out the used solder container 8b from the replacement means; transfer means for transferring the used solder container 8b to the carrying-out means from the replacement means; and stopping means for stopping and staying, in the carrying-in means, the replenishment solder container 8a transferring to the replacement means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an automatic solder replenishment unit for automatically refilling a solder container into a printing press.

  In the screen printing machine, a mask having a printing pattern hole is held inside the machine body, and the substrate is conveyed by the substrate conveying device under the mask to perform screen printing of cream solder on the substrate. At that time, cream solder is supplied to the upper surface of the mask by the solder supply device. Then, the cream solder is rolled on the mask by the squeegee device and pushed into the printed pattern hole. The solder supply apparatus described in Patent Document 1 below is configured such that cream solder placed in a solder container is set and pressed onto a lower mask by applying pressure by a pressing cylinder. Two solder containers are set in the container holding part, and the empty solder container can be moved to the standby position.

JP 2014-240159 A

  In the solder supply device of the above-mentioned document, the solder is supplied from the solder container located under the pressing cylinder. However, the emptied solder container moves to a standby position that is out of the position. At that time, the other solder container moves integrally and is sent under the pressing cylinder, and the solder supply is continuously performed. Then, the emptied solder container is removed and replaced with a new solder container, and the solder supply device is replenished with solder. However, the replacement of such a new solder container has been troublesome because it has to be done by the operator. In addition, the operator is informed of the replenishment timing by the notification means, but there is a risk that a refill error may occur without noticing the notification.

  Accordingly, an object of the present invention is to provide an automatic solder replenishment unit that automatically replaces a solder container in order to solve such a problem.

  An automatic solder replenishment unit according to the present invention includes a replacement means for moving a replenishment solder container and a used solder container in a rotational direction and arranging them at a predetermined position, the refill solder container, and the used solder container with a printing machine. Delivery means for delivering between, a delivery means for supplying the replenishment solder container to the replacement means, an unloading means for unloading the used solder container from the replacement means, and the used solder Transfer means for transferring the container from the replacement means to the carry-out means, and stop means for retaining the refill solder container to be transferred to the replacement means in the carry-in means.

  According to the above configuration, the replenishment solder container supplied from the carry-in means via the stop means and the used solder container returned from the printing machine by the delivery means are moved in the rotation direction by the replacement means, and the transfer means Then, the used solder container is moved to the carry-out means and discharged to the carry-out means, and the refill solder container is delivered to the printing machine by the delivery means.

It is the top view which showed notionally the internal structure of the screen printer. It is the figure which showed notionally the structure of the automatic solder replenishment unit. It is the figure at the time of used solder container delivery which showed notionally the structure of the automatic solder replenishment unit. It is the figure at the time of the used solder container discharge | emission which showed notionally the structure of the automatic solder replenishment unit. It is the side view which showed the carrying-in side roller conveyor. It is the figure which showed the robot hand which is a delivery means. It is the figure which showed notionally the structure of the automatic solder replenishment unit of 2nd Embodiment. It is the figure which showed the other plan of the delivery means.

  Next, an embodiment of an automatic solder replenishment unit according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view conceptually showing the internal configuration of a screen printing machine to which an automatic solder replenishment unit can be attached. This screen printing machine 1 prints cream solder on a substrate, and constitutes a circuit board production line together with, for example, a solder inspection machine for inspecting the printed state and a component mounting machine for mounting electronic components on a substrate. To do. A conveyance port is formed in both sides of the machine body of the screen printing machine 1, and the substrate is conveyed in the X-axis direction that is the machine body width direction by a conveyance device inside the machine body. In the drawing, the board loaded from the left side is printed in the machine, the printed board is carried out to the right side, and sent to the next component mounting machine or the like.

  The screen printing machine 1 is configured such that a mask 12 having a printing pattern hole formed in a mask holder 11 is held horizontally, and the substrate is conveyed under the mask 12 in a horizontal state. Accordingly, the screen printing machine 1 includes a substrate transport device that loads and unloads a substrate in the body width direction below the mask holder 11, that is, the mask 12, a clamp device that clamps the substrate from the front-rear direction of the body (Y-axis direction), A backup device that moves the substrate up and down to the clamping position, a lifting device that lifts and lowers the clamped substrate together with the device, and the like are assembled.

  On the other hand, a squeegee device 13 is provided above the mask 12. The squeegee device 13 is movable along a guide rail 14 provided in the longitudinal direction of the machine body, and has a configuration in which cream solder is spread on the mask 12 while rolling. That is, the squeegee device 13 is mounted with a pair of squeegee heads facing in the longitudinal direction of the machine body, and each squeegee is moved up and down by a cylinder. A pair of squeegee heads, when one squeegee descends according to the moving direction of the squeegee device 13 to roll cream solder on the mask 12 and the squeegee device 13 moves in the opposite direction, the squeegee of the other squeegee head The cream solder is rolled down on the mask 12.

  The squeegee device 13 includes a solder supply mechanism. In the solder supply mechanism, a guide rail 15 parallel to the X-axis direction is formed with respect to the main body of the squeegee device 13, and a cup holder 16 that holds the solder cup 8 is slidably attached to the guide rail 15. It has been. Further, the cup holder 16 is configured with a ball screw mechanism, and linear movement along the guide rail 15 is possible by the output of the drive motor. The cup holder 16 is provided with pressing means for discharging the cream solder in the solder cup 8, and the cream solder is discharged onto the mask 12 while the cup holder 16 moves in the X-axis direction. Yes.

  The cup holder 16 is provided with a container detection sensor so that the remaining amount of cream solder in the solder cup 8 can be detected. Therefore, the used solder cup 8 and the new refill solder cup 8 are exchanged at a predetermined timing according to the detection result. In this embodiment, the automatic solder replenishment unit 2 attached to the screen printing machine 1 It is supposed to be done automatically. As shown in the figure, the automatic solder replenishment unit 2 is attached to the side of the screen printing machine 1 and at the front of the machine body that does not interfere with the board transfer port. And at the time of replacement | exchange, as the cup holder 16 shows with a dashed-dotted line, it moves to the position where the delivery window 17 exists, and the solder cup 8 is delivered between the automatic solder replenishment units 2.

  Next, FIG. 2 is a diagram conceptually showing the configuration of the automatic solder replenishment unit 2 attached to the screen printing machine 1. The automatic solder replenishment unit 2 supplies a refill solder cup 8 (hereinafter referred to as “replenishment solder cup 8a”) to the screen printing machine 1, while a used solder cup (hereinafter referred to as “used solder cup 8b”). )). Therefore, a supply unit for supplying the refill solder cup 8a, a discharge unit for discharging the used solder cup 8b, a replacement unit for replacing the refill solder cup 8a and the used solder cup 8b, and the like are configured. In the replacement part, two mounting bases 23 on which the solder cups 8 are placed are attached to the rotary table 21 at symmetrical positions around the rotation axis.

  The carry-in roller conveyor 25 for supplying the replenishing solder cups 8 a is installed on the opposite side of the transfer window 17 of the screen printer 1 with the rotary table 21 interposed therebetween. Here, FIG. 5 is a side view showing the carry-in side roller conveyor 25. The carry-in side roller conveyor 25 is inclined so as to descend toward the turntable 21 side. Therefore, the carry-in side roller conveyor 25 has an end portion at a high position protruding outward from the unit main body 20 as shown in FIG. 2, but the refilling solder cup 8a replenished by the operator is naturally a low rotating table 21. It will slide to the side and move. A stopper 26 is provided at the leading end of the carry-in roller conveyor 25, and a stopper mechanism for holding the refill solder cup 8a on the carry-in roller conveyor 25 is configured.

  The stopper 26 is configured to move in the vertical direction, and is normally in the raised position as shown by a solid line in FIG. 5 to stop the movement of the refilling solder cup 8a. Thus, the refilling solder cup 8a can be moved. Accordingly, the supply portion of the replenishing solder cup 8a has a plurality of replenishing solder cups 8a arranged in a line on the carry-in side roller conveyor 25, and the stopper 26 descends and rises at a predetermined time interval, thereby replenishing the top replenishment. The solder cup 8a passes through the mounting table 23, and the next refill solder cup 8a is stopped by the stopper 26 to be in a standby state.

  Further, the automatic solder replenishment unit 2 is provided with a carry-out side roller conveyor 27 for discharging the used solder cup 8b. The carry-out side roller conveyor 27 is inclined so as to descend toward the collection box 28 placed outside the unit main body 20 from the rotary table 21 side. In the present embodiment, the position for supplying the refill solder cup 8a and the position for discharging the used solder cup 8b are the same supply / discharge position P1. Accordingly, the lower end portion of the carry-in side roller conveyor 25 and the upper end portion of the carry-out side roller conveyor 27 are at the supply / discharge position P1. On the other hand, there is a delivery position P2 for delivering the solder cup 8 to and from the screen printing machine 1 at a position opposite to 180 °. The two mounting bases 23 alternate between the supply / discharge position P1 and the delivery position P2.

  A pusher 29 for moving the used solder cup 8b to the carry-out side roller conveyor 27 is provided at the supply / discharge position P1. The pusher 29 is a solenoid that outputs a linear motion by, for example, an expansion / contraction operation of a plunger, and constitutes a push-out mechanism for the used solder cup 8b. Therefore, the used solder cup 8b placed on the placement table 23 on the horizontal placement surface is conveyed to the supply / discharge position P1 and is pushed out by the pusher 29 so as to be delivered to the carry-out side roller conveyor 27. ing.

  Although the automatic solder replenishment unit 2 is not shown in FIG. 2, a robot hand 32 as shown in FIG. 6 is provided on the delivery position P2 side. In the robot hand 32, a pair of chuck claws 322 that can be opened and closed is assembled to a rotary shaft 321. Therefore, as shown in FIG. 6, the solder cup 8 gripped by the pair of chuck claws 322 is transferred between the mounting table 23 indicated by the solid line and the cup holder 16 indicated by the one-dot chain line by the rotation of the rotating shaft 321. To be done.

  Incidentally, the cream solder in the solder cup 8 is preferably maintained at a predetermined temperature in order to maintain its quality. Therefore, the automatic solder replenishment unit 2 is provided with a temperature sensor 33 for measuring the temperature in the unit main body 20 and a temperature adjusting device 34 for adjusting the internal temperature. Since the automatic solder replenishment unit 2 is surrounded by the box-shaped unit body 20, it is conceivable that the temperature rises due to the heat generated by the operating screen printer 1. Therefore, for example, a cooling fan or the like for lowering the room temperature is used for the temperature adjustment device 34.

  The automatic solder replenishment unit 2 is provided with a controller 30 for driving and controlling a drive motor used for the rotary table 21 and the robot hand 32 and a solenoid of the pusher 29 and the like. The controller 30 is connected to the control device 18 that controls the drive of the screen printing machine 1 in addition to controlling the temperature adjustment device 34 based on the temperature information from the temperature sensor 33, and receives a replenishment command signal as will be described later. A series of controls relating to the delivery of the solder cup 8 are performed.

  Next, the operation of the automatic solder replenishment unit 2 will be described. In the automatic solder replenishment unit 2 attached to the screen printing machine 1, a plurality of replenishing solder cups 8a are placed on the carry-in side roller conveyor 25 as shown in FIGS. The replenishing solder cup 8a stands by in a state where it contacts the stopper 26 due to the inclination of the carry-in roller conveyor 25. At this time, the temperature adjustment device 34 is controlled by the controller 30 based on the temperature information from the temperature sensor 33, and the inside of the unit main body 20 is maintained at about 24 to 25 ° C., for example.

  On the other hand, the screen printing machine 1 performs a printing process on the substrate, and cream solder is discharged onto the mask 12 from the solder cup 8 held by the cup holder 16 at a predetermined timing. Since the remaining amount of cream solder is detected by the container detection sensor, a replenishment command signal is transmitted from the control device 18 to the controller 30 based on the detection signal. Therefore, when the solder cup 8 is replenished, the used solder cup 8b moves to the position of the delivery window 17 as shown by a one-dot chain line in FIG. 1 and as shown in FIG. 3, and is delivered from the cup holder 16 by the robot hand 32. It is transferred to the mounting table 23 at the position P2. The delivery window 17 has an automatic opening / closing door that opens and closes at the delivery timing.

  In the carry-in side roller conveyor 25, when the stopper 26 is lowered, the leading refill solder cup 8a slides down to the mounting table 23 at the supply / discharge position P1, as indicated by the one-dot chain line in FIG. Then, the next refill solder cup 8a is stopped by the stopper 26 ascending before it slides down and enters a standby state. Subsequently, when the rotary table 21 is rotated by 180 °, the positions of the refilling solder cup 8a and the used solder cup 8b are switched between the supply / discharge position P1 and the delivery position P2, as shown in FIG. Then, the used solder cup 8b at the supply / discharge position P1 is pushed out of the mounting table 23 by the pusher 29, and slides on the carry-out side roller conveyor 27 and moves to the collection box 28. Further, the refilling solder cup 8 a at the delivery position P <b> 2 is transferred to the cup holder 16 by the robot hand 32.

  Therefore, according to the automatic solder replenishment unit 2, when the cream solder of the solder cup 8 runs out in the screen printer 1, the used solder cup 8b and the replenishment solder cup 8a filled with the cream solder are used. Exchange is done automatically. Therefore, the operator can perform other operations without worrying about the replacement of the solder cup 8, and can eliminate the replenishment error of the cream solder. Moreover, since the carry-in means and carry-out means for the cream solder 8 are the carry-in side roller conveyor 25 and the carry-out side roller conveyor 27 that do not require power, the weight reduction and the configuration of the automatic solder replenishment unit 2 can be simplified. .

  Since the automatic solder replenishment unit 2 has the supply / discharge position P1 and the delivery position P2 at positions close to the mounting table 23 of the rotary table 21, the entire unit can be reduced in size. Therefore, it can be attached to a conventional screen printing machine or the like by retrofitting. Further, since the internal structure of the automatic solder replenishment unit 2 is covered by the box-shaped unit body 20, dust is prevented from entering the cream solder of the solder cup 8 put therein. Furthermore, the temperature control device 34 of the cooling fan controls the temperature inside the unit main body 20, so that the quality of the cream solder can be ensured and the air can flow from the inside to the outside. It is possible to prevent dust from entering the cup 8.

  Next, a second embodiment of the automatic solder replenishment unit will be described. FIG. 7 is a diagram conceptually showing the configuration of the automatic solder replenishment unit 3 of the second embodiment. The same components as those in the above embodiment will be described with the same reference numerals. The automatic solder replenishment unit 3 is provided with a replacement table 41 for replacing the solder cup 8. The replacement table 41 is obtained by superposing a guide table 412 for positioning the solder cup 8 on a circular rotary table 411 on which the solder cup 8 is placed.

  The guide table 412 has two mounting portions 415 that are cut out in a U shape in a circular plate as shown in the figure, and are formed at symmetrical positions around the rotation axis. The positions of the mounting portion 415 shown in the figure are a supply position P3 and a delivery position P2. That is, in the present embodiment, the used solder cup 8b is discharged not by the supply position P3 but by the discharge guide 42 in the middle of rotation. On the replacement table 41, a discharge guide 42 extending from the rotation center side to the carry-out roller conveyor 27 side is disposed. Since the guide table 41 is thin and only the lower part of the solder cup 8 is included in the mounting portion 415, the side surface of the used solder cup 8b on the rotating replacement table 41 contacts the discharge guide 42. It has become.

  In the automatic solder replenishment unit 3, the replenishment solder cup 8a is introduced from the carry-in side roller conveyor 25, as in the first embodiment. Therefore, the top replenishing solder cup 8a slides on the slope and enters the mounting portion 415 at the supply position P3, but the next replenishing solder cup 8a hits the replenishing solder cup 8a in the mounting portion 415 and carries-in rollers. It will stay on the conveyor 25. That is, the automatic solder replenishment unit 3 has no stopper mechanism, and when the replacement table 41 rotates, the circumferential side surface 416 is always in sliding contact with the next replenishment solder cup 8a as a stopping means. Configured to work.

  Therefore, the refilling solder cup 8a from the carry-in side roller conveyor 25 enters the mounting portion 415 at the supply position P3, while the used solder cup 8b used in the screen printing machine 1 is delivered from the cup holder 16 by the robot hand 32. It is transferred to the mounting portion 415 at the position P2. Then, when the replacement table 41 is rotated by 180 °, the positions of the refill solder cup 8a and the used solder cup 8b are moved between the supply position P3 and the delivery position P2.

  At that time, the next refilling solder cup 8a located at the top on the carry-in side roller conveyor 25 slides on the circumferential side surface 416 of the rotating replacement table 41, and the standby state is maintained as it is. The used solder cup 8b hits the discharge guide 42 in the middle of moving from the delivery position P2 to the supply position P3, is pushed out from the mounting portion 415, moves onto the carry-out roller conveyor 27, and slides to the collection box 28. Sent. When the mounting portion 415 thus emptied moves to the supply position P3, the replenishment solder cup 8a that has been in the standby state on the carry-in side roller conveyor 25 is slid down and set.

  Therefore, in this embodiment, the replacement of the used solder cup 8b and the new refill solder cup 8a filled with cream solder is automatically performed, so that an effect of replenishment mistakes and the like can be achieved. Further, by the configuration of the replacement table 41 having the mounting portion 415 and the circumferential side surface 416, the refilling solder cup 8a is transferred from the carry-in roller conveyor 25, and the used solder cup 8b is transferred to the carry-out roller conveyor 27. It was possible to adopt a configuration that does not use a drive mechanism for transfer. Therefore, the automatic solder replenishment unit 3 can further reduce the weight of the entire unit and simplify the configuration.

  As another embodiment, the delivery of the solder cup 8 may be structured as shown in FIG. In the first embodiment, the mounting table 23 of the rotary table 21 is fixed horizontally, but the mounting table 24 having this tilting mechanism is used. In this case, the screen printing machine 1 is provided with a delivery table 14 having the same mechanism, and can be transferred from the delivery table 14 to the cup holder 16 in the machine. The mounting table 24 and the delivery table 14 face each other at the same height when the solder cup 8 is delivered, so that the delivery side performs an ascending operation and an inclination operation. Thereby, the solder cup 8 slides and is delivered to the other party.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, the automatic solder replenishment unit 3 of the second embodiment may be configured using the stopper 26 of the first embodiment.
Further, for example, the automatic solder replenishment unit 2 of the first embodiment may be provided with the discharge guide 42 of the second embodiment instead of the pusher 29.
Further, for example, an endless belt may be provided as a solder cup delivery structure, and delivery may be performed between the delivery table 14 and the mounting table 23 of the screen printing machine 1.
For example, in the above-described embodiment, the solder cup 8 is described as an example of the solder container. However, a syringe containing cream solder may be handled.
Further, for example, in the above-described embodiment, the description has been made by showing the roller conveyor as the carrying-in means and the carrying-out means. However, in addition, the belt conveyor, the slide having a low frictional resistance, or the roller conveyor provided with the driving mechanism. It may be.

DESCRIPTION OF SYMBOLS 1 ... Screen printer 2 ... Automatic solder replenishment unit 8 ... Solder cup 8a ... Solder cup for replenishment 8b ... Used solder cup 16 ... Cup holder 20 ... Unit main body 21 ... Rotary table 23 ... Mounting stand 25 ... Carrying side roller conveyor 26 ... Stopper 27 ... Roll-out roller conveyor 29 ... Pusher 30 ... Controller 34 ... Temperature control device

Claims (8)

Replacement means for moving the replenishing solder container and the used solder container in the rotational direction and arranging them at a predetermined position;
Delivery means for delivering the refill solder container and the used solder container to a printing machine;
Carrying-in means for supplying the refill solder container to the replacement means;
Unloading means for unloading the used solder container from the replacement means;
Transfer means for transferring the used solder container from the replacement means to the carry-out means;
An automatic solder replenishment unit having stop means for retaining the refill solder container to be transferred to the replacement means on the carry-in means.   2. The automatic solder replenishing unit according to claim 1, wherein the transfer means is an extrusion mechanism that pushes the used solder container from the replacement means to the carry-out means.   2. The automatic solder replenishing unit according to claim 1, wherein the transfer means is a discharge-side guide plate that guides the used solder container that is moved in the rotation direction by the replacement means to the carry-out means side.   4. The automatic solder replenishment unit according to claim 1, wherein the carry-in means is a carry-in roller conveyor inclined toward the exchange means side. 5.   6. The automatic solder replenishing unit according to claim 1, wherein the carry-out means is a carry-out side roller conveyor inclined from the replacement means side.   The automatic solder replenishment unit according to claim 4 or 5, wherein the stopping means is a stopper mechanism that is disposed at an end portion of the carry-in roller conveyor and includes a movable stopper that stops the refill solder container. The replacement means is a disk-shaped rotating body in which the replenishment solder container and the used solder container enter a recess for rotating integrally,
The automatic solder replenishment unit according to any one of claims 1 to 5, wherein a circumferential side surface other than the concave portion of the rotating body constituting the replacement unit functions as the stop unit. The automatic solder replenishment unit according to claim 1, wherein the automatic solder replenishment unit is surrounded by a box-shaped unit main body and has temperature control means for adjusting the internal temperature.

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